Reference Manual

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EN/LZT 720 0008 P2A

P007551A

Ericsson GSM System, BSS R8

RBS 2106, RBS 2206

Reference Manual

Preliminary

Summary of content (487 pages)

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ry na P007551A eli mi Pr Ericsson GSM System, BSS R8 RBS 2106, RBS 2206 Reference Manual EN/LZT 720 0008 P2A
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ry na eli mi Pr
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E RBS 2106, RBS 2206 Reference Manual RBS 2106, RBS 2206 Reference Manual Pr eli mi na ry © Ericsson Radio Systems AB — All Rights Reserved — EN/LZT 720 0008 2001-11-28 P2A © Ericsson Radio Systems AB — All Rights Reserved — 1 (485)
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Pr eli mi na ry RBS 2106, RBS 2206 Reference Manual Due to continued progress in methodology, design and manufacturing, the contents of this document are subject to revision without notice.
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RBS 2106, RBS 2206 Reference Manual Contents 1 Preface ........................................................................................................... 15 1.1 Objectives................................................................................................ 15 1.2 Target Groups..........................................................................................15 1.3 RBS 2000 Library Overview....................................................................15 1.4 How to Order CPI.
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RBS 2106, RBS 2206 Reference Manual 4.8 Co-Siting with TDMA RBS Using an ASU .............................................. 82 5 Product Data RBS 2106................................................................................87 5.1 Introduction .............................................................................................. 87 5.2 RBS 2106 Cabinet Description................................................................87 5.3 Connection Interfaces.......................................
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RBS 2106, RBS 2206 Reference Manual 9.4 Technical Data.........................................................................................163 10 Unit Description, CXU-10 ........................................................................... 165 10.1 Block Diagram ....................................................................................... 165 10.2 Functions ............................................................................................... 165 10.3 External Interfaces......
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RBS 2106, RBS 2206 Reference Manual 16.1 ACCU.....................................................................................................195 16.2 DCCU.....................................................................................................196 17 Unit Description, ACCU-02.........................................................................199 17.1 Block Diagram ....................................................................................... 199 17.2 Functions ................
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RBS 2106, RBS 2206 Reference Manual 23 Physical Channel Handling........................................................................237 23.1 References.............................................................................................237 23.2 Functions ............................................................................................... 237 24 Speech and Data Services.........................................................................241 24.1 References.........................
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RBS 2106, RBS 2206 Reference Manual 27.3 Functions ............................................................................................... 275 28 Base Station Power Control ...................................................................... 279 28.1 References.............................................................................................279 28.2 Concepts................................................................................................279 28.3 Functions ...............
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RBS 2106, RBS 2206 Reference Manual 35 Short Message Service...............................................................................301 35.1 References.............................................................................................301 35.2 Functions ............................................................................................... 301 35.3 Operational Conditions.......................................................................... 303 36 Diversity Supervision ..........
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RBS 2106, RBS 2206 Reference Manual 40.2 Concepts................................................................................................327 40.3 Functions ............................................................................................... 327 40.4 Operational Conditions.......................................................................... 329 41 Restart and Recovery.................................................................................331 41.1 References..................
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RBS 2106, RBS 2206 Reference Manual 44.14 BS Fault Indicator................................................................................354 44.15 Operational Indicator ........................................................................... 354 44.16 Tx Not Enabled Indicator.....................................................................356 44.17 Local Mode Indicator ........................................................................... 357 44.18 External Alarms Indicator .................
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RBS 2106, RBS 2206 Reference Manual 47.8 RBS Diagnostics....................................................................................382 48 Operation and Maintenance Terminal.......................................................383 48.1 References.............................................................................................383 48.2 Concepts................................................................................................383 48.3 Functions ...............................
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RBS 2106, RBS 2206 Reference Manual 54.3 Functions ............................................................................................... 425 55 Terrestrial Link Handling............................................................................435 55.1 References.............................................................................................435 55.2 Concepts................................................................................................435 55.3 Function..............
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Preface 1 Preface This Reference Manual is valid for the Ericsson GSM system BSS R8 except for the description of GSM 800, which is valid from BSS R9. For the RBS 2000 library structure, see Figure 1 on page 16. 1.1 Objectives ry This manual is a detailed overview of the Ericsson RBS 2000 Macro system based on 12–TRX cabinets for GSM 800, GSM 900, GSM 1800 and GSM 1900.
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Preface RBS 2000 RBS 2206 Library Reference Manual Installation and Integration Manual RBS Synchronization Manual Cabinet Reconfiguration Manual Maintenance Manual Spare Parts Catalogue Figure 1 1.4 ry P007803D The CPI for Macro 12–TRX cabinets How to Order CPI 1.4.1 Outside Ericsson na CPI can be ordered in the same way as all other Ericsson products using the product number to identify each product. Orders can be placed through any local Ericsson company, or alternatively, on the Internet.
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Preface Once your access is setup, a reply with all the details you need will be sent to you. Alternatively, you can download the Portal Order form from the Extranet. • The first time you log in to the site, we recommend you to read the user instructions. 1.4.2 ry More information about Extranet can be found at the Extranet address below. For support on issues related to the Extranet, Tel.: +46 8 585 33085.
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Product Safety Requirements RBS 2000 2 Product Safety Requirements RBS 2000 The purpose of this document is to specify the product safety requirements for RBS 2000. 2.1 References 73/23/EEC Low Voltage Directive CAN/CSA-C22.2 No 1-M94 ry Audio, Video and Similar Electronic Equipment CAN/CSA-C22.
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Product Safety Requirements RBS 2000 In addition to this the product fulfills the environmental requirements. The RBS is so designed and constructed that, under all conditions of normal use and under a likely fault condition, it protects against personal injury from electrical shock and other hazards. The RBS is protected against serious fire originating in the equipment as well as mechanical hazards in the equipment, as well as mechanical hazards in the meaning of the applicable standard.
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Environmental Capabilities 3 Environmental Capabilities 3.1 Scope This chapter covers the environmental requirements for the indoor and outdoor temperature non-controlled operation conditions. Subjects covered are: Climatic, Biological, Chemically active substances, Mechanically active substances and Mechanical conditions. 3.2 Terminology Normal operation conditions ry Definition of concepts: Safe function na Environmental conditions where all units shall be able to function as specified.
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Environmental Capabilities 3.3 3.4 3.4.1 References IEC 721-3-.. Classification of groups of environmental parameters and their severities. ETSI 300 019-1-.. Classification of environmental conditions. Transport -40 C - +70 C General Conditions ry The severity of the requirements is in conformity with: IEC 721-3-2 classes 2K4/2B2/2C2/2S2/2M2. and ETS 300 019-1-2 Class 2.3 "PUBLIC transportation". Note: These requirements restrict flight transportation to aircrafts with pressure cabins.
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Environmental Capabilities Note: 3.4.5 The values are average yearly levels of airborne contaminants that can be accepted. It is assumed that one of the contaminants is dominant at each site, and that the other is present in insignificant amounts. Mechanically active substances The severity of these requirements is in conformity with: IEC 721-3-2 class 2S2. and ETS 300 019-1-2 Class 2.3. 3.4.
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Environmental Capabilities The severity of these requirements is in conformity with IEC 721-3-1 classes 1K4/1Z2/1Z3/1Z5. and ETS 300 019-1-1 class 1.2 Requirements Table 4 Unit Value Temperature - 25 - +55 Relative Humidity % C 10 -100 ry 3.5.3 Environmental Parameters Biological conditions 3.5.4 na The severity of these requirements is in conformity with IEC 721-3-1 class 1B2. and ETS 300 019-1-1 class 1.
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Environmental Capabilities 3.6 Handling -40 C - +70 C 3.6.1 General Conditions This section refers to shorter periods of transport and storage in unpacked conditions. Precautions to avoid condensation before subjecting the equipment to operational conditions are necessary. 3.6.2 Climatic conditions 3.6.3 Biological conditions. ry During handling the equipment withstands the conditions stated in Section 3.4.2 on page 22 in this document.
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Environmental Capabilities 3.7.2 Climatic conditions. The severity of these requirements are in conformity with: IEC 721-3-3 classes 3K3/3Z2/3Z4. and ETS 300 019-1-3 Class 3.1. Table 6 Environmental Unit Parameters Relative Humidity % C Normal Condition Safe funct. Non Destr. +5- +40 0 - +45 -10 - +55 5-85 5 - 90 5 - 90 ry 3.7.3 Temperature Value Biological conditions Requirements 3.7.4 na There are no requirements for this condition.
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Environmental Capabilities Table 7 Environmental Parameters Unit Value Vibration sinus: displacement mm acceleration m/s² frequency Hz 0.6 2 2-9 9 -200 Vibration random: 0.1 2 3 0.2 ASD m /s acceleration frequency Shock: duration Safe function 2) 3.8 m/s² 5.
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Environmental Capabilities 3.9 Operation Outdoor -33 C - +45 C The severity of the requirements is in conformity with: IEC 721-3-4 classes 4K2/4Z5/4Z7/4B1/4C2(4C3)/4S2/4M5. and ETS 300 019-1-4 Class 4.1. "NON-WEATHERPROTECTED location", except for the temperature range which is extended to +45 C. This clause refers to the environment which an RBS for outdoor non-weather protected location shall endure.
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Environmental Capabilities Table 10 Environmental Parameters Unit Value Vibration sinus: displacement mm acceleration m/s² frequency Hz 0.6 2 2-9 5 no. of test directions 3 testing method IEC 68-2-6 ry no. of sweep cycles Vibration random: 2 3 0.1 m /s 2 3 0.2 acceleration m/s² 3.8 acceleration m/s² 5.
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Environmental Capabilities Table 11 Test frequency range 1-15 Hz Required Response Spectrum RRS Shape of RRS as IEC fig 3 Number of time scale histories 1/ testing direction Duration of time scale histories 35 s Number of testing directions 3 3.10 ry There are possibilities to equip the RBS with an optional Seismic Exposure protection device. Operation Outdoor -33 C - +55 C 3.
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Environmental Capabilities Table 13 Environmental Parameters Unit Temperature Relative humidity Absolute humidity Change of temperature Rain temperature C % 3 g/m C/min C Value Normal Cond. Non destruct. -33 - +55 5 - 100 0.26 -40 6 5 -40 - +70 5 - 100 0.26 - 40 6 5 Vibration sinus: Shock: peak acc. duration Fauna 1) 2 3 m /s Hz na ASD frequency mm 2 m/s Hz 3 ry displacement acceleration frequency Vibration random: 2 2-9 10 9 - 200 0.5 2 - 200 0.
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Radio Configurations, RBS 2106 and RBS 2206 4 Radio Configurations, RBS 2106 and RBS 2206 This chapter describes the dTRU-based radio configurations and their performance. Note that the GSM 800 configurations are valid from BSS R9. Introduction 4.1.1 Mobile Telephone System eli mi na ry 4.1 Figure 2 RBS 2000 in the Ericsson GSM system The Base Station System (BSS) contains two functional entities: the Base Station Controller (BSC) and the Base Transceiver Station (BTS).
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Figure 3 4.1.2 na ry Radio Configurations, RBS 2106 and RBS 2206 An example of an RBS 2000 servicing a three-cell site Radio Base Station 4.2 4.3 eli mi The Radio Base Station 2000 (RBS 2000) is Ericsson’s second generation of RBSs developed to meet the GSM specifications for BTSs. References GSM:05.05 GSM Requirements 05.05 phase 2+ Radio Transmission and Reception. GSM:05.08 GSM Requirements 05.08 phase 2+ Radio Subsystem Link Control.
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Radio Configurations, RBS 2106 and RBS 2206 Note: The TMA is inside the RBS border. RBS Antenna TRX Combining system TRX + . . . TRX Antenna reference point P007531A na Figure 4 X = Antenna reference point ry filtering X Antenna System The antenna system is constituted by all RF transmission and reception antennas, directed to cover the same area or multi-casting configurations. eli mi Antenna Sharing Unit (ASU) An ASU is a unit used for sharing RX antennas between RBSs.
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Radio Configurations, RBS 2106 and RBS 2206 4.3.2 Radio coverage in two sectors, that is two distinct areas, using two BTSs. 3–sector site Radio coverage in three sectors, that is three distinct areas, using three BTSs. Cabinet Types RBS 2106 Outdoor cabinet with a maximum of six dTRUs/12 TRXs per cabinet RBS 2206 Indoor cabinet with a maximum of six dTRUs/12 TRXs per cabinet ry 4.3.
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Radio Configurations, RBS 2106 and RBS 2206 Downlink: 1805 – 1880 MHz GSM 1900 Uplink: 1850 – 1910 MHz Downlink: 1930 – 1990 MHz These frequency bands are supported by the configurations described in this chapter. 4.5 Basic Configurations ry The GSM 800, GSM 900, GSM 1800 and GSM 1900 configurations meet the GSM requirements, except where otherwise stated. na The capacity of a configuration is defined at the TX and RX antenna reference points at the RBS border.
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Radio Configurations, RBS 2106 and RBS 2206 TX1 TX TX1 HC1 TX HC1 Hybrid combiner Hybrid combiner TX1+TX2 TX1+TX2 HC2 TX HC2 TX RX1 RX RX2 RX RX1 RX RX2 na RX TX2 ry TX2 RX RX RX3 RX RX RX4 eli mi RX4 RX3 dTRU with no hybrid combiner in use P007394B dTRU with and without hybrid combiner in use Pr Figure 6 dTRU with hybrid combiner in use 38 (485) © Ericsson Radio Systems AB — All Rights Reserved — EN/LZT 720 0008 P2A 2001-11-28
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Radio Configurations, RBS 2106 and RBS 2206 4.5.2 CDU-F Configurations Basic Configuration F9de_2.4 and F18d_2.4 dTRU TX1 TX1 RX1 TX2 CDU-F FCOMB RX2 TX2 TX1 RX1 RX1 FCOMB RX2 TX2 LNA eli mi CXU Figure 7 Ant. LNA na RX2 X ry dTRU DPX TX1 TX2 TX/ RXA RXB X P007376A F9de_2.4 and F18d_2.4 Characteristics Number of CDUs 1 Frequency band E-GSM (F9de_2.4) GSM 1800 (F18d_2.4) 4 Number of feeders 2 Number of antennas 2 Antenna configuration TX/RX + RX Pr Max.
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Radio Configurations, RBS 2106 and RBS 2206 Basic Configuration F9det_2.4 and F18dt_2.4 dTRU TX1 TX1 RX1 TX2 CDU-F FCOMB RX2 RX1 TX2 RX2 LNA LNA LNA DPX Figure 8 X Ant. RXB X P007377A eli mi CXU DPX na RX1 DPX FCOMB TX1 RX2 LNA ry dTRU TX2 DPX DPX TX1 TX2 TX/ RXA F9det_2.4 and F18dt_2.4 Characteristics Number of CDUs 1 Frequency band E-GSM (F9det_2.4) GSM 1800 (F18dt_2.
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Radio Configurations, RBS 2106 and RBS 2206 Basic Configuration F9de_2.6 and F18d_2.6 dTRU TX1 TX1 RX1 TX2 CDU-F FCOMB RX2 FCOMB TX1 RX2 RX1 TX2 RX2 RX2 TX2 TX1 LNA LNA X TX2 FCOMB BTS1 TX1 TX2 RX2 RXB CDU-F TX1 BTS2 FCOMB eli mi RX1 ry Ant. RX1 dTRU TX1 RX1 dTRU TX2 X na dTRU DPX TX1 TX2 TX/ RXA TX2 TX1 dTRU TX1 RX1 TX2 CDU-F FCOMB RX2 TX1 TX2 Pr dTRU TX2 DPX X TX/ RXA FCOMB TX1 Ant.
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Radio Configurations, RBS 2106 and RBS 2206 Characteristics Number of CDUs 2* Frequency band E-GSM (F9de_2.6) GSM 1800 (F18d_2.6) 6 Number of feeders 2 Number of antennas 2 Antenna configuration TX/RX + RX ry Max. number of TRXs * Three CDU-Fs support two sectors. The second BTS is only shown to illustrate a 2 x 6 configuration. BTS1 and BTS2 are two different physical implementations of the same basic configuration.
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Radio Configurations, RBS 2106 and RBS 2206 Basic Configuration F9det_2.6 and F18dt_2.
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Radio Configurations, RBS 2106 and RBS 2206 Characteristics Number of CDUs 2* Frequency band E-GSM (F9det_2.6) GSM 1800 (F18dt_2.6) 6 Number of feeders 2 Number of antennas 2 Antenna configuration TX/RX + RX ry Max. number of TRXs TMA configuration ddTMA + ddTMA or ddTMA + rTMA * Three CDU-Fs support two sectors. na The second BTS is only shown to illustrate a 2 x 6 configuration. BTS1 and BTS2 are two different physical implementations of the same basic configuration.
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Radio Configurations, RBS 2106 and RBS 2206 Basic Configuration F9de_2.8 and F18d_2.8 dTRU TX1 TX1 RX1 TX2 CDU-F FCOMB RX2 TX2 FCOMB TX1 RX1 RX1 RX2 dTRU LNA na TX2 TX1 RX1 TX2 eli mi FCOMB TX1 TX2 TX2 Ant. CDU-F TX1 RX2 dTRU X ry dTRU DPX TX1 TX2 TX/ RXA DPX X TX/ RXB FCOMB TX1 RX1 RX1 RX2 LNA TX2 Pr CXU Figure 11 EN/LZT 720 0008 2001-11-28 P2A P007380A F9de_2.8 and F18d_2.
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Radio Configurations, RBS 2106 and RBS 2206 Characteristics Number of CDUs 2 Frequency band E-GSM (F9de_2.8) GSM 1800 (F18d_2.8) 8 Number of feeders 2 Number of antennas 2 Antenna configuration TX/RX + TX/RX Pr eli mi na ry Max.
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Radio Configurations, RBS 2106 and RBS 2206 Basic Configuration F9det_2.8 and F18dt_2.8 dTRU TX1 TX1 RX1 TX2 CDU-F FCOMB RX2 TX2 RX1 RX1 TX1 RX1 TX2 RX2 dTRU FCOMB DPX TX1 TX2 TX2 TX1 RX1 TX2 Ant. DPX LNA DPX TX/ RXB X FCOMB RX1 RX2 X CDU-F eli mi TX1 DPX na LNA TX2 dTRU LNA FCOMB TX1 RX2 DPX ry dTRU DPX TX1 TX2 TX/ RXA Ant. LNA Pr CXU Figure 12 EN/LZT 720 0008 2001-11-28 P2A P007381A F9det_2.8 and F18dt_2.
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Radio Configurations, RBS 2106 and RBS 2206 Characteristics Number of CDUs 2 Frequency band E-GSM (F9det_2.8) GSM 1800 (F18dt_2.8) 8 Number of feeders 2 Number of antennas 2 Antenna configuration TX/RX + TX/RX ry Max.
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Radio Configurations, RBS 2106 and RBS 2206 Basic Configuration F9de_2.12 and F18d_2.12 dTRU TX1 TX1 RX1 TX2 CDU-F FCOMB RX2 TX2 TX1 RX1 RX1 RX2 FCOMB dTRU TX1 RX1 RX2 LNA CDU-F TX1 TX2 FCOMB eli mi TX2 dTRU Ant. na TX2 X ry dTRU DPX TX1 TX2 TX/ RXA TX1 TX1 RX1 TX2 FCOMB RX2 TX2 dTRU TX1 TX1 RX1 TX2 CDU-F FCOMB Pr RX2 dTRU DPX TX1 TX2 TX2 FCOMB X TX/ RXA Ant. TX1 RX1 RX1 RX2 LNA TX2 CXU P007382A Figure 13 EN/LZT 720 0008 2001-11-28 P2A F9de_2.
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Radio Configurations, RBS 2106 and RBS 2206 Characteristics Number of CDUs 3 Frequency band E-GSM (F9de_2.12) GSM 1800 (F18d_2.12) 12 Number of feeders 2 Number of antennas 2 Antenna configuration TX/RX + TX/RX Pr eli mi na ry Max.
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Radio Configurations, RBS 2106 and RBS 2206 Basic Configuration F9det_2.12 and F18dt_2.12 dTRU TX1 TX1 RX1 TX2 CDU-F FCOMB RX2 TX1 TX2 TX2 TX/ RXA X FCOMB TX1 Ant. RX1 RX1 RX2 LNA dTRU TX1 RX1 RX2 TX1 TX2 TX2 TX1 TX1 CDU-F FCOMB FCOMB eli mi RX1 na TX2 dTRU DPX LNA DPX ry dTRU DPX TX2 RX2 TX2 dTRU TX1 TX1 RX1 TX2 CDU-F FCOMB TX/ RXB RX2 TX1 TX2 TX2 RX1 RX2 RX1 DPX LNA DPX X FCOMB TX1 Pr dTRU DPX Ant.
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Radio Configurations, RBS 2106 and RBS 2206 Characteristics Number of CDUs 3 Frequency band E-GSM (F9det_2.12) GSM 1800 (F18dt_2.12) 12 Number of feeders 2 Number of antennas 2 Antenna configuration TX/RX + TX/RX ry Max. number of TRXs TMA configuration CDU-G Configurations na 4.5.3 ddTMA + ddTMA Basic Configuration G8d_2.2, G9de_2.2, G18d_2.2 and G19d_2.2 Ant S1(3,5) TX1 TX1 RX1 RX2 TX2 dTRU LNA eli mi RX1 DPX X Ant.
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Radio Configurations, RBS 2106 and RBS 2206 Note: The ASU is optional equipment. Basic Configuration G8dt_2.2, G9det_2.2, G18dt_2.2 and G19dt_2.2 Ant S1(3,5) TX1 TX1 RX1 RX1 DPX LNA DPX LNA DPX X RX2 TX2 RX2 dTRU ASU CDU-G Ant S2(4,6) Figure 16 DPX DPX X ddTMA P007385B eli mi Number of CDUs 1 Frequency band GSM 800 (G8dt_2.2) E-GSM (G9det_2.2) GSM 1800 (G18dt_2.2) GSM 1900 (G19dt_2.
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Radio Configurations, RBS 2106 and RBS 2206 Basic Configuration G8dh_2.4, G9deh_2.4, G18dh_2.4 and G19dh_2.4 Ant S1(3,5) dTRU TX1+TX2 CDU-G TX1 RX1 RX1 LNA DPX X TX/ RXA RX2 TX1+ dTRU TX2 TX2 RX1 RX2 ASU CXU Ant S2(4,6) DPX X P007386B G8dh_2.4, G9deh_2.4, G18dh_2.4 and G19dh_2.4 eli mi Figure 17 LNA TX/ RXB na RX2 ry Ant. Characteristics Number of CDUs 1 Frequency band GSM 800 (G8dh_2.4) E-GSM (G9deh_2.4) GSM 1800 (G18dh_2.4) GSM 1900 (G19dh_2.
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Radio Configurations, RBS 2106 and RBS 2206 Basic Configuration G8dht_2.4, G9deht_2.4, G18dht_2.4 and G19dht_2.4 Ant S1(3,5) dTRU TX1+TX2 TX1 RX1 RX1 CDU-G DPX LNA DPX LNA DPX X RX2 TX/ RXA TX1+ dTRU TX2 TX2 RX1 RX2 CXU ASU Ant S2(4,6) DPX LNA DPX X TX/ RXB ddTMA P007387B G8dht_2.4, G9deht_2.4, G18dht_2.4 and G19dht_2.4 eli mi Figure 18 DPX LNA na RX2 ry Ant. Characteristics Number of CDUs 1 Frequency band GSM 800 (G8dht_2.4) E-GSM (G9deht_2.4) GSM 1800 (G18dht_2.
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Radio Configurations, RBS 2106 and RBS 2206 Basic Configuration G8dh_3.6, G9deh_3.6, G18dh_3.6 and G19dh_3.6 Ant S2 Ant S1 TX1 CDU-G TX1+TX2 dTRU RX1 RX1 LNA RX2 DPX TX/ RXA X Ant. TX1+ TX2 TX2 RX1 RX2 RX2 TX1+ TX2 X TX1 CDU-G RX1 LNA RX2 TX1+ dTRU TX2 DPX eli mi LNA RX2 TX1+ TX2 TX1 CDU-G RX1 RX1 RX2 Pr TX1+ dTRU TX2 RX1 RX2 LNA TX Ant. BTS1 BTS2 DPX X DPX X TX TX/ RXA Ant.
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Radio Configurations, RBS 2106 and RBS 2206 Characteristics Number of CDUs 2* Frequency band GSM 800 (G8dh_3.6) E-GSM (G9deh_3.6) GSM 1800 (G18dh_3.6) GSM 1900 (G19dh_3.6) 6 Number of feeders 3 Number of antennas ry Max. number of TRXs 3 Antenna configuration TX/RX + TX/RX + TX na * Three CDU-Fs support two sectors. The second BTS is only shown to illustrate a 2 x 6 configuration. BTS1 and BTS2 are two different physical implementations of the same basic configuration.
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Radio Configurations, RBS 2106 and RBS 2206 Basic Configuration G8dht_3.6, G9deht_3.6, G18dht_3.6 and G19dht_3.6 Ant S2 Ant S1 dTRU TX1+TX2 TX1 CDU-G RX1 RX1 RX2 LNA DPX DPX LNA DPX X TX/ RXA Ant. TX1+ TX2 TX2 RX1 RX2 RX2 LNA DPX DPX LNA ry dTRU DPX X TX/ RXB ddTMA TX1+ TX2 TX1 CDU-G RX1 X Ant.
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Radio Configurations, RBS 2106 and RBS 2206 Characteristics Number of CDUs 2* Frequency band GSM 800 (G8dht_3.6) E-GSM (G9deht_3.6) GSM 1800 (G18dht_3.6) GSM 1900 (G19dht_3.6) 6 Number of feeders 3 Number of antennas 3 Antenna configuration TMA configuration ry Max. number of TRXs TX/RX + TX/RX + TX ddTMA + ddTMA na * Three CDU-Fs support two sectors. The second BTS is only shown to illustrate a 2 x 6 configuration.
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Radio Configurations, RBS 2106 and RBS 2206 Basic Configuration G8dh_4.8, G9deh_4.8, G18dh_4.8 and G19dh_4.8 Ant S1(3) dTRU TX1+TX2 TX1 RX1 RX1 TX/ RXB CDU-G LNA DPX X RX2 TX1+ dTRU TX2 ry Ant. TX2 RX1 LNA dTRU na RX2 TX1+ TX2 TX1 X TX/ RXB CDU-G RX1 LNA eli mi RX1 DPX DPX X RX2 TX1+ dTRU TX2 RX1 Ant. TX TX2 LNA RX2 TX DPX X ASU CXU Pr Ant S3(5) Figure 21 60 (485) P007390B G8dh_4.8, G9deh_4.8, G18dh_4.8 and G19dh_4.
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Radio Configurations, RBS 2106 and RBS 2206 Characteristics Number of CDUs 2 Frequency band GSM 800 (G8dh_4.8) E-GSM (G9deh_4.8) GSM 1800 (G18dh_4.8) GSM 1900 (G19dh_4.8) 8 Number of feeders 4 Number of antennas 4 Antenna configuration TX/RX + TX + TX/ RX + TX na The ASU is optional equipment. Pr eli mi Note: ry Max.
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Radio Configurations, RBS 2106 and RBS 2206 Basic Configuration G8dht_4.8, G9deht_4.8, G18dht_4.8 and G19dht_4.8 Ant S1(3) dTRU TX1+TX2 TX1 RX1 RX1 CDU-G DPX DPX LNA LNA DPX X TX/ RXA RX2 Ant. TX1+ dTRU TX2 TX2 RX1 dTRU TX1+ TX2 TX1 RX1 RX1 RX2 eli mi RX2 DPX TX1+ dTRU TX2 TX X na LNA ry ddTMA CDU-G DPX LNA DPX LNA DPX X Ant. ddTMA TX TX2 RX1 DPX LNA RX2 CXU TX/ RXA X ASU Pr Ant S3(5) Figure 22 P007391B G8dht_4.8, G9deht_4.8, G18dht_4.8 and G19dht_4.
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Radio Configurations, RBS 2106 and RBS 2206 GSM 1800 (G18dht_4.8) GSM 1900 (G19dht_4.8) 8 Number of feeders 4 Number of antennas 4 Antenna configuration TX/RX + TX + TX/ RX + TX TMA configuration ddTMA + ddTMA The ASU is optional equipment. Pr eli mi na Note: ry Max.
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Radio Configurations, RBS 2106 and RBS 2206 Basic Configuration G8dh_6.12, G9deh_6.12, G18dh_6.12 and G19dh_6.12 Ant S1 TX1+TX2 TX1 CDU-G RX1 RX1 RX2 TX1+ dTRU TX2 LNA TX2 RX1 LNA TX1+ dTRU TX2 RX1 LNA eli mi TX1+ TX2 DPX RX1 LNA TX1+ TX2 TX1 CDU-G RX1 RX1 Pr RX2 TX1+ dTRU TX2 RX1 TX X Ant.
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Radio Configurations, RBS 2106 and RBS 2206 Characteristics Number of CDUs 3 Frequency band GSM 800 (G8dh_6.12) E-GSM (G9deh_6.12) GSM 1800 (G18dh_6.12) GSM 1900 (G19dh_6.12) 12 Number of feeders 6 Number of antennas 6 Antenna configuration 2 x TX/RX + 4 x TX The ASU is optional equipment. Pr eli mi na Note: ry Max.
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Radio Configurations, RBS 2106 and RBS 2206 Basic Configuration G8dht_6.12, G9deht_6.12, G18dht_6.12 and G19dht_6.12 Ant S1 dTRU TX1+TX2 TX1 CDU-G RX1 RX1 RX2 LNA DPX DPX LNA DPX X TX/ RXA TX1+ dTRU TX2 TX2 RX1 LNA TX1+ dTRU TX2 RX1 LNA RX2 dTRU TX1+ TX2 RX1 TX X Ant.
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Radio Configurations, RBS 2106 and RBS 2206 Characteristics Number of CDUs 3 Frequency band GSM 800 (G8dht_6.12) E-GSM (G9deht_6.12) GSM 1800 (G18dht_6.12) GSM 1900 (G19dht_612) 12 Number of feeders 6 ry Max. number of TRXs Number of antennas 6 Antenna configuration 2 x TX/RX + 4 x TX Note: 4.5.4 ddTMA + ddTMA na TMA configuration The ASU is optional equipment. RX Connection from Antenna to dTRU eli mi Connection in the RX path is performed using the CXU.
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Radio Configurations, RBS 2106 and RBS 2206 Table 16 1 +1 + 2 configurations with CDU-G Cell TMA CDU TMA Antenna 1 1 TX / RX1 1 TX / RX A 2 TX / RX1 3 TX / RXA 1 RX / RX2 2 TX / RXA 2 TX / RX2 4 RXB 3 TX / RX1 5 TX / RXA 3 TX / RX2 6 TX / RXB 3 Table 17 Cell 2 x 6 configurations with CDU-F ry 2 TMA CDU No. (TMA config. only) No.
PAGE 71
Radio Configurations, RBS 2106 and RBS 2206 Cell 1 2 3 Table 21 Cell 3 x 4 and 3 x 2 configurations with CDU-G CDU ASU Connector TMA No. / Connector (Co-siting only) No. (TMA config.
PAGE 72
Radio Configurations, RBS 2106 and RBS 2206 4.6.1 RBS 2106 and RBS 2206 Configurations CDU-F Single Band Configurations Table 23 CDU-F configurations with a fully-equipped cabinet Configuration TMA Number of Antennas Allowed Number of dTRUs 1 x 12 F9de_2.12 No (2) (0..6) F9det_2.12 M (2) (0..6) F18d_2.12 No (2) (0..6) F18dt_2.12 M (2) (0..6) 2 x F9de_2.6 No (2) (2) (0..3) (0..3) 2 x F9det_2.6 M (2) (2) (0..3) (0..3) 2 x F18d_2.6 No (2) (2) (0..3) (0..3) 2 x F18dt_2.
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Radio Configurations, RBS 2106 and RBS 2206 Table 24 CDU-F configurations with a partly-equipped cabinet Configuration TMA Number of Antennas Allowed Number of dTRUs 1x4 F9de_2.4 No (2) (0) (0) (0..2) (0) (0) F9det_2.4 M (2) (0) (0) (0..2) (0) (0) F18d_2.4 No (2) (0) (0) (0..2) (0) (0) F18dt_2.4 M (2) (0) (0) (0..2) (0) (0) 2 x F9de_2.4 No (2) (2) (0) (0..2) (0..2) (0) 2 x F9det_2.4 M (2) (2) (0) (0..2) (0..2) (0) 2 x F18d_2.4 No (2) (2) (0) (0..2) (0..2) (0) 2 x F18dt_2.
PAGE 74
Radio Configurations, RBS 2106 and RBS 2206 Table 26 CDU-G configurations without hybrid combiner in a partly-equipped cabinet only Configuration TMA Number of Antennas Allowed Number of dTRUs 1x2 G8d_2.2 No (2) (0) (0) (0..1) (0) (0) G8dt_2.2 M (2) (0) (0) (0..1) (0) (0) G9de_2.2 No (2) (0) (0) (0..1) (0) (0) G9det_2.2 M (2) (0) (0) (0..1) (0) (0) G18d_2.2 No (2) (0) (0) (0..1) (0) (0) G18dt_2.2 M (2) (0) (0) (0..1) (0) (0) G19d_2.2 No (2) (0) (0) (0..1) (0) (0) G19dt_2.
PAGE 75
Radio Configurations, RBS 2106 and RBS 2206 CDU-G Single Band Configuration with Hybrid Combiner Table 27 CDU-G configurations with hybrid combiner in a fully- or partly-equipped cabinet Configuration TMA Number of Antennas Allowed Number of dTRUs 3x4 3 x G8dh_2.4 No (2) (2) (2) (0..2) (0..2) (0..2) 3 x G8dht_2.4 M (2) (2) (2) (0..2) (0..2) (0..2) 3 x G9deh_2.4 No (2) (2) (2) (0..2) (0..2) (0..2) 3 x G9deht_2.4 M (2) (2) (2) (0..2) (0..2) (0..2) 3 x G18dh_2.4 No (2) (2) (2) (0..
PAGE 76
Radio Configurations, RBS 2106 and RBS 2206 Table 28 CDU-G configurations with hybrid combiner in a partly-equipped cabinet only Configuration TMA Number of Antennas Allowed Number of dTRUs 1x4 G8dh_2.4 No (2) (0) (0) (0..2) (0) (0) G8deht_2.4 M (2) (0) (0) (0..2) (0) (0) G9deh_2.4 No (2) (0) (0) (0..2) (0) (0) G9deht_2.4 M (2) (0) (0) (0..2) (0) (0) G18dh_2.4 No (2) (0) (0) (0..2) (0) (0) G18dht_2.4 M (2) (0) (0) (0..2) (0) (0) G19dh_2.4 No (2) (0) (0) (0..
PAGE 77
Radio Configurations, RBS 2106 and RBS 2206 CDU-F Configurations for GSM 900 and GSM 1800 Table 29 Dual band configurations with CDU-F in a fully- or partly-equipped cabinet Configuration TMA Number of Antennas Allowed Number of dTRUs 1x4|1x8 F9de_2.4 | F18d_2.8 No | No (2) | (2) (0..2) | (0..2) F9det_2.4 | F18dt_2.8 M|M (2) | (2) (0..2) | (0..4) F9de_2.8 | F18d_2.4 No | No (2) | (2) (0..4) | (0..2) F9det_2.8 | F18dt_2.4 M|M (2) | (2) (0..4) | (0..2) F9de_2.4 | 2 x F18d_2.
PAGE 78
Radio Configurations, RBS 2106 and RBS 2206 There are two options for placing the equipment in the cabinet: GSM 900 on the left-hand side/GSM 1800 on the right-hand side, or the other way round. Table 32 Dual band configurations, CDU-G with hybrid in a partly-equipped cabinet only SCC Configuration TMA Number of Antennas Allowed Number of dTRUs 1x4|1x4 G9deh_2.4 | G18dh_2.4 No | No (2) | (2) (0..2) (0) | (0..2) G9deht_2.4 | G18dht_2.4 M|M (2) | (2) (0..2) (0) | (0..
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Radio Configurations, RBS 2106 and RBS 2206 CDU-G Configurations for GSM 800 and GSM 1900 Table 35 Dual band configurations, CDU-G with hybrid in a fully- and partly-equipped cabinet Configuration TMA Number of Antennas Allowed Number of dTRUs 1x8|1x4 G8dh_4.8 | G19dh_2.4 No | No (4) | (2) (0..4) | (0..2) G8dht_4.8 | G19dht_2.4 M|M (4) | (2) (0..4) | (0..2) G8dh_2.4 | G19dh_4.8 No | No (2) | (4) (0..2) | (0..4) G8dht_2.4 | G19dht_4.8 M|M (2) | (4) (0..2) | (0..4) 2 x G8dh_2.
PAGE 80
Radio Configurations, RBS 2106 and RBS 2206 M = Mandatory SCC 1 x 2 and 2 x 2 can be achieved as a subset of SCC 3 x 2. SCC 1 x 2 requires one CDU-G. SCC 2 x 2 requires two CDU-Gs. SPB with CDU-G Configurations with Hybrid Combiner The following SCC supports SPB. The basic radio configurations specified are used. SW power boost can be used in cells that have two dTRUs installed. CDU-G configurations with hybrid combiner SCC Configuration TMA 3x4 3 x G8dht_2.4 M 3 x G9deht_2.4 M 3 x G19dht_2.
PAGE 81
Radio Configurations, RBS 2106 and RBS 2206 4.7.1 RBS 200 Expanded with 12–TRX Cabinet Co-Siting with RBS 200 Using a Filter Combiner Table 39 Expansion using filter combiner Original SCC Cabinet Combiner Antennas TMA Original SCC Basic Configuration Antennas 1 x 16 * 1x4 RBS 200 FCOMB (3) No 1x12 F9de_2.12 (2) RBS 205 FCOMB (3) No F18d_2.12 (2) RBS 205 FCOMB (3) M F18dt_2.12 (2) RBS 205 FCOMB&DPX (2) No F18d_2.12 (2) RBS 205 FCOMB (2) M F18dt_2.
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Radio Configurations, RBS 2106 and RBS 2206 Co-Siting with RBS 200 Using Hybrid Combiner Table 40 Expansion using hybrid combiner Original SCC Cabinet Combiner Antennas TMA Original SCC Basic Configuration Antennas 3x8* 3 x 4 ** RBS 200 HCOMB (3) (3) (3) No 3x4 3 x G9deh_2.4 (2) (2) (2) RBS 205 HCOMB (3) (3) (3) No 3 x G18dh_2.4 (2) (2) (2) RBS 205 HCOMB (3) (3) (3) M 3 x G18dht_2.4 (2) (2) (2) RBS 205 HCOMB&DPX (2) (2) (2) No 3 x G18dh_2.
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Radio Configurations, RBS 2106 and RBS 2206 Co-Siting with Single TRU-Based RBS 2000 Using Hybrid Combiner Table 42 Expansion using hybrid combiner RBS 1 RBS 2 Original Basic Configuration SCC Antennas Original Basic SCC Configuration Antennas 3x8* 3x4 3 x C + 9d_2.4 (2) (2) (2) 3x4 3 x G9deh_2.4 (2) (2) (2) D9de_2.12 3 x C + 9de_2.4 (2) (2) (2) 3 x G9deh_2.4 (2) (2) (2) 3 x C + 18d_2.4 (2) (2) (2) 3 x G18dh_2.4 (2) (2) (2) 3 x C + 18_2.4 (2) (2) (2) 3 x G18dht_2.
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Radio Configurations, RBS 2106 and RBS 2206 Co-Siting with dTRU-Based RBS 2000 Using Hybrid Combiner Table 44 Expansion using hybrid combiner RBS 1 RBS 2 Original SCC Basic Configuration Antennas Original SCC Basic Configuration Antennas 3x8* 3x4 3 x G9deh_2.4 (2) (2) (2) 3x4 3 x G9deh_2.4 (2) (2) (2) 3 x G9deht_2.4 (2) (2) (2) 3 x G9deht_2.4 (2) (2) (2) 3 x G18dh_2.4 (2) (2) (2) 3 x G18dh_2.4 (2) (2) (2) 3 x G18dht_2.4 (2) (2) (2) 3 x G18dht_2.
PAGE 85
Radio Configurations, RBS 2106 and RBS 2206 TX RX TX RX Co-sited TDMA RBS TDMA RBS TX/RX TX/RX RX A RX B dTRU Based RBS P008526A Separate TX and two separate RX antennas, no TMAs ry Figure 25 If TMAs are used in the original configuration, they are replaced with dual-duplex TMAs (ddTMAs).
PAGE 86
Radio Configurations, RBS 2106 and RBS 2206 4.8.3 Two Separate Duplex Antennas If two separate duplex antennas are already in use, the recommendation is to install new antennas for dTRU based RBS and not use co-siting at all. TX/RX TX/RX TX/RX TDMA RBS Co-sited TDMA Co-sited RBS TDMA RBS TX/RX TX/RX dTRU Based RBS ry TDMA RBS TX/RX Recommendation: No Co-siting! 4.8.
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Radio Configurations, RBS 2106 and RBS 2206 RX Co-sited TDMA RBS TDMA RBS ddTMA TMA TX/RX TX/RX RX A RX B dTRU Based RBS na Figure 29 TX Co-sited TDMA RBS TDMA RBS RX B ddTMA RX dTRU Based RBS RX A ddTMA TX/RX TX/RX TX/RX TX ry TX/RX P008528A Internal duplex filter eli mi A special case is where only one TX/RX and one RX port are accessible from the outside of the cabinet. In that case the solution stated below can be used.
PAGE 88
Radio Configurations, RBS 2106 and RBS 2206 antennas, but limits the number of GSM TRXs to two (that is, one dTRU) for each sector. Support of more GSM TRXs requires additional antennas.
PAGE 89
Product Data RBS 2106 5 Product Data RBS 2106 5.1 Introduction The RBS 2106 is an outdoor macro base station of high capacity: it can support up to twelve tranceivers. It can be configured for omni cells, or for multi-sector cells of up to three sectors.
PAGE 90
Product Data RBS 2106 ADM Auxiliary Distribution Module ASU Antenna Sharing Unit BFU Battery Fuse Unit CDU Combining and Distribution Unit CXU Configuration Switch Unit DF Distribution Frame DXU Distribution Switch Unit dTRU Double Transceiver Unit FCU Fan Control Unit IDM Internal Distribution Module OXU Optional Expansion Unit PSU Power Supply Unit TM Transport Module TMA-CM Tower-Mounted Amplifier Control Module ry AC Connection Unit na 5.2.
PAGE 91
Product Data RBS 2106 per sector. A combination of three CDU-Fs can handle 12 transceivers on two antennas. CDU-G can be configured either for high capacity or for high coverage. It is a combiner that can be used for synthesizer hopping. To achieve capacity, CDU-G is used in a configuration where the hybrid combiner in the dTRU is used. Up to two dTRUs (four transceivers) can be connected to two antennas. One-, two- and three-sector configurations are supported.
PAGE 92
Product Data RBS 2106 Internal Distribution Module (IDM) The IDM is a panel for distributing the internal +24 V DC power to the various units. Each distribution circuit in the cabinet is connected to a circuit breaker in the IDM. Auxiliary Distribution Module (ADM) The ADM handles distribution and fusing of system voltage (+24 V DC and -48 V DC) to the transport module (TM). ry It should be noted that the ADM is optional equipment in the RBS 2106.
PAGE 93
Product Data RBS 2106 • Combined Climate Unit. This has both heating and refrigeration. • Air-to-Air Heat Exchanger climate unit. This provides heating, and cooling through forced convection. It has no refrigerating capacity; the cabinet cannot be cooled to a temperature lower than that of the outside (ambient) air. Both types consist of a Climate Control Unit (CCU), a heater, a heat exchanger, fans and air-ducts.
PAGE 94
Product Data RBS 2106 Heat Exchanger RBS CCU DC/DC AC/DC Transformer Return Air na Heater ry Sub Racks Heat Exchanger eli mi Supply Air Figure 34 DF P008418A Block diagram, Air-to-Air Heat Exchanger The Distribution Frame (DF) is a connection and overvoltage protection (OVP) device for external alarms and PCM-links. The DF protects equipment inside the RBS from overvoltage and overcurrent which may occur in external lines.
PAGE 95
Product Data RBS 2106 RUs which typically are located in the OXU slots include the MiniDXC, the DXX, and the TMA-CM. The 19–inch position above the CXU is used for an Antenna Sharing Unit (ASU) in co-sited cabinets. Mini-DXC ry Mini-DXC together with the DXU improves the BTS site access. This in turn improves utilization of the PCM links, and minimizes both traffic disturbances upon reconfiguration, and the effect of link failures.
PAGE 96
Product Data RBS 2106 5.2.3 Size, Weight, and Space Requirements Dimensions 1300 ry 925 na 1560 56,5 710 eli mi 925 Unit of measurement: mm Figure 35 P008565A Overall dimensions, RBS 2106 Footprint The footprint of the RBS 2106 is 1300 mm wide and 710 mm deep. Note that the door, which is 242 mm deep, is not included in the footprint, as it does not reach down to the ground. Pr The installation frame of the RBS 2106 has the same bottom holing pattern as that of the RBS 2102.
PAGE 97
Product Data RBS 2106 65 355 50 ry 20 O mm 710 665 1300 Front 125 650 na 725 1150 1235 Unit of measurement: mm Drilling template for RBS 2106. Distance between holes is identical to that of RBS 2102.
PAGE 98
Product Data RBS 2106 ry 90o r= 1300 mm Figure 37 5.2.4 P008564A na Unit of measurement: mm Free space required for opening door Operating Environment eli mi Climate Endurance The ambient temperature range of the RBS 2106 in normal operation depends upon whether active (refrigerated) cooling or forced convection cooling is used. Ranges for both climate unit types are given in the table below.
PAGE 99
Product Data RBS 2106 bottom of the cabinet where all external power and transmission lines from the antennas or network are brought into the cabinet. Radio signals are connected through RF connectors. All other connections employ screw terminals on the external side of the interface. On the internal side, d-subs are used to access through the EMC zone. AC Connection Field eli mi na ry 5.3.
PAGE 100
Product Data RBS 2106 5.3.2 Antenna Connection Field To CDUs (x6) 7-16 Connectors na ry A1 2 3 4 5 6 eli mi B2 Figure 39 B4 B6 B1 Antenna sharing connectors B3 B5 N connectors P008714A Antenna Connection Field This connection field is where the RF antenna connectors and the antenna sharing connectors are located. Pr The antenna connection field provides an interface for six RF antenna connectors and 6 RX connectors, which prepares the cabinet for 4–way diversity or co-siting.
PAGE 101
Product Data RBS 2106 5.3.3 DF Connection Field Distribution module OVP modules ry External alarms na Figure 40 P008706A RBS 2106 DF This is the connection field for: Transmission • External alarms and overvoltage protection • • • eli mi • ESB (TG-synch.) GPS/LMU Power for external use (+24 V DC). Connections lead to the DXU, the Transport Module, and equipment installed in OXU slots. Power is supplied by the cabinet’s internal power system.
PAGE 102
Product Data RBS 2106 The external alarms are defined at the installation. They are defined by using the Operation and Maintenance Terminal (OMT) or from the BSC using the remote OMT. OVP Module for PCM Lines na ry The Distribution Frame (DF) provides overvoltage protection for PCMlines. In addition, a PCM-line can be provided with a balun (balanced/ unbalanced transformer) to convert an unbalanced 75 line to a balanced 120 line.
PAGE 103
Product Data RBS 2106 connected, the balun board is used to convert 75 100/120 balanced line. unbalanced to • A bypass board, to bypass the transmission network during a power failure. • A combined bypass and balun board to convert an unbalanced system to a balanced system for the RBS, and to bypass an unbalanced system if the RBS is subjected to a power failure.
PAGE 104
Product Data RBS 2106 AC outlet AC mains External battery ACCU CU DC Filter & OVP Outside RBS cabinet Inside RBS cabinet ACCU DU Internal battery PSUs Climate DF OVP DC out na IDM ry BFU Internal DC users Figure 42 P008677B Functional block diagram of the RBS 2106 power system Pr eli mi The hardware which makes up the RBS 2106 power system includes the ACCU, IDM, DC-filter, PSU, BFU, DC/DC converter, batteries and cables.
PAGE 105
Product Data RBS 2106 IDM DC/DC Converter ry ACCU ADM Batteries (TM) na (TM) Batteries eli mi AC Connection Field Figure 43 5.4.1 BFU P008598B Major units in RBS 2106 power system AC Supply Single-phase or three-phase AC power may be used.
PAGE 106
Product Data RBS 2106 Power consumption Table 49 Power consumption, various climate systems and input voltages Power consumption, input voltage >200 V AC Climate system Heater plus forced-air cooling only TBD Heater plus refrigerated cooling (1) TBD External Fuses Table 50 ry (1) To be determined.
PAGE 107
Product Data RBS 2106 the back-up batteries, the BFU also provides prioritized power supply that can be used for example for transmission equipment. It should be noted that battery back-up is optional in the RBS 2106. 5.5 Antenna System This chapter contains information about antenna configurations for outdoor cells. ry There are a number of antenna system products available, such as antennas, feeders, jumpers, TMAs and so on.
PAGE 108
Product Data RBS 2106 • • • • • 3x2 (and its derivatives: 1x2 and 2x2) 3x4 (and its derivatives: 1x4 and 2x4) 1x8 1x12 2x6 ry The RF cables between each CDU and its associated dTRUs are standardized and do not normally change. Each CDU uses a set of standard RF wiring patterns for connection between each CDU and the cabinet connection field.
PAGE 109
Product Data RBS 2106 5.6.1 Cascading RBS 1 BSC G703-1 G703-2 BSC G703-3 G703-4 RBS 2 ry G703-1 G703-2 G703-3 na G703-4 Next RBS Figure 44 P007503A Cascade connections eli mi RBS 2106 can be cascaded; that is, time slots which are not used by one base station are sent forward - cascaded - to the next base station on the same BSC transmission line. The cable from the previous and to the next base station in the chain is connected through four PCM cables. Table 51 5.6.
PAGE 110
Product Data RBS 2106 Mini-DXC / DXX node, a combination of cross-connect, control and G.703 interface units. The Mini-DXC plug-in unit is a digital cross-connect with five G.703 ports. The 2–card DXX plug-in unit is a digital cross-connect with four G.704 ports, and one slot for 2 – 4 additional interfaces that can be G.703, HDSL, LTE or optical fibre. The 1–card DXX plug-in unit is a digital cross-connect with four G.703 ports. Transport Module (TM) ry 5.6.
PAGE 111
Product Data RBS 2206 6 Product Data RBS 2206 6.
PAGE 112
Product Data RBS 2206 Mini DXC Mini Link Installation Material Earthing DF Cable ladder 6.2 Site Power Options 120 - 250 V AC mains input power through screw-terminals. The power inputs feed four separate PSUs. A battery back-up +24 V DC may be connected simultaneously as an option. This is the same as the +24 V described below. • +24 V DC. The radio cabinet can operate on +24 V DC from an external power source. • -(48 - 60) V DC is connected in a similar manner as the AC.
PAGE 113
Product Data RBS 2206 6.3.1 AC Mains Power Connection There are two ways to connect power to the base station. They are: • Single phase line to neutral. • Single phase line to line. Single Phase Line to Neutral RBS interface L AC Distribution box na Figure 46 N RBS ry Circuit breaker P007349A Power connection, L1-N (120 - 250 V AC) eli mi One circuit breaker per PSU is required.
PAGE 114
Product Data RBS 2206 Table 54 AC mains power requirements Voltage range for specified performance (phase voltage) 120 - 250 V AC Voltage range 108 -275 V AC Frequency 45 - 65 Hz Inrush current, max. 30 A Maximum AC power 1.4 kW x 4 Non-destructive range 0 – 300 V AC Overvoltage <20 ms 300 V (1) ry (2) (1) 90 V AC with reduced output power. (2) Install external filter and stabilizer if not met.
PAGE 115
Product Data RBS 2206 Fuses The +24 V DC cables must be protected with an approved circuit breaker/fuse. Table 57 +24 V DC fuses recommendation Minimum for Safe Function Maximum Allowed Fuse Rating 175 A 200 A ry +24 V DC Cables The +24 V DC supply is connected to the DC filter by a pair of 2 95 - 150 mm cables, one for + and one for -. -(48 - 60) V DC Power Supply na 6.3.3 DC Power Requirements -(48 - 60) V Table 58 DC power requirements Nominal -48/-60 V DC Range -(40.0 - 72.
PAGE 116
Product Data RBS 2206 6.
PAGE 117
Product Data RBS 2206 Distribution Switch Unit (DXU-21) The DXU is the central control unit for the RBS. It supports the interface to the BSC, and it collects and transmits the alarms. The DXU controls the power and climate equipment for the RBS. It has a removable compact flashcard which makes it possible to replace a faulty DXU without the need for loading RBS software from the BSC. The DXU is also provided with four connections for transmission lines. It can handle both 2 Mbit (E1) and 1.
PAGE 118
Product Data RBS 2206 Configuration Switch Unit (CXU) The task of the CXU is to cross-connect the CDU and the dTRU in the receiver path. The CXU makes it possible to expand or reconfigure a cabinet without moving or replacing any RX cables. The RX inputs/outputs on the dTRU and the CDU are placed in such positions that they minimize the amount of cable types for connecting the CXU with the dTRUs and the CDUs. The CXU is configured by means of software.
PAGE 119
Product Data RBS 2206 Measurements eli mi 600 Figure 49 2100 1800 1850 na ry 250 300 6.4.2 400 P006382B Radio cabinet measurements Recommended distance between the cabinet and cable ladder is 250 mm. A shorter distance makes it difficult to exchange fans and may hinder the air flow. Pr The door projects 50 mm in front of the cabinet.
PAGE 120
Product Data RBS 2206 Site Equipment Room 300 ry 250 na 1000 a2=130o 800 Unit of measurement: mm P006362A Floor layout and space requirements eli mi Figure 50 1000 The picture above shows floor layout and space requirements. There must always be a space between the cabinet and the cable ladder for the flow of exhaust air, and to be able to replace fans.
PAGE 121
Product Data RBS 2206 6.4.4 Foot Print o 20x75 45 220 (RBS 2202) 320 400 RBS 2206 FRONT Unit of measurement: mm Figure 51 400 598 ry 99 P008315A Drilling template for RBS 2206 na The RBS 2206 has the same footprint as both cabinets in the RBS 200 system, and the RBS 2202 cabinet. The base frame is used as a template to mark new holes for the RBS 2206. Replacements eli mi The RBS 2206 cable interfaces are different from the RBS 200 and the RBS 2202.
PAGE 122
Product Data RBS 2206 6.4.7 Climate Endurance Table 62 Climatic endurance Environmental Parameters Units Normal Conditions Non–Destructive Conditions Temperature +5 - +40 -10 - +55 Relative humidity % 5 - 85 5 - 90 C Normal conditions describe the environmental conditions where all units function as specified. ry Non-destructive conditions describe environmental stress above the limits for normal conditions with no function guaranteed and unspecified degradation.
PAGE 123
Product Data RBS 2206 For further information see Section 6.5.1 Distribution Frame with Overvoltage Protection on page 123. 6.4.11 RBS 2206 Connection Interface G703-1 G703-2 ACCU/DCCU FCU +24 V DC DC out G703-4 TD ry G703-3 RD External Alarms ESB-2 P007683C eli mi na ESB-1 DC-Filter-01 Figure 52 Connection field for external connectors External cable connections are made in the top section of the cabinet, towards the front, inside the door.
PAGE 124
Product Data RBS 2206 Antenna Cable Connections Rx Tx/Rx Figure 53 Connection interface CDU-F P007937A Tx/Rx2 na Tx/Rx1 ry CDU-F eli mi CDU-G Figure 54 P007936A Connection interface CDU-G Antenna feeders are directly connected to the CDUs. If bias-injector is used, it is connected directly to the CDU and the antenna feeder is connected to bias-injector.
PAGE 125
Product Data RBS 2206 Opto Cable Connections The optical cable inputs between the RBS 2206 and the BBS 2000 are located on, and immediately below, the FCU, see Figure 52 on page 121. Table 65 Opto cable connections Description FCU-RD From BBS FCU-TD To BBS Optional Connections ry Connector na The right part of the cabinet contact field has four pieces of blank panels for optional applications. Blank panels can be exchanged with contact plates in order to equip the area. 6.
PAGE 126
Product Data RBS 2206 OVP for External Alarm It is possible to connect 16 external alarms to the DF. Each alarm connection is provided with over-voltage protection. (One OVP module protects two alarm connections.) OVP Module for PCM Lines na ry The distribution Frame (DF) provides overvoltage protection for PCMlines. In addition, a PCM-line can be provided with a blaun (balanced/ unbalanced transformer) to convert an unbalanced 75 line to a balanced 120 line.
PAGE 127
Product Data RBS 2206 A balun board. RBS 2206 is designed for 100/120 balanced (twisted pair) cable. If 75 unbalanced (coaxial) cable is to be connected, the balun board is used to convert 75 unbalanced to 100/120 balanced line. • A bypass board, to bypass the transmission network during a power failure. • A combined bypass and balun board to convert an unbalanced system to a balanced system for the RBS, and to bypass an unbalanced system if the RBS is subjected to power failure.
PAGE 128
Product Data RBS 2206 75 unbalanced lines or 120 1.5 Mbit/s PCM balanced 100 balanced lines. The second case is lines. On the top part of the cabinet are connections for optional transmission equipment which is mounted externally. The connections are: PCM cables • +24 V DC • Blank panels for connectors to Optional Transmission Equipment (OXU) Transmission Power ry 6.5.4 • RBS 2206 can feed the transmission equipment with +24 V DC. The maximum power output is 250 W.
PAGE 129
Product Data RBS 2206 where the second base station can be located at some distance from the first one. Both base stations use the same transmission line to the BSC. The cable from the previous and to the next base station in the chain is connected through four PCM cables A-D. 6.
PAGE 130
Product Data RBS 2206 Weights Table 67 6.6.3 BBS 2000 unit weight Unit Weight in kg Weight in lb. Battery stand, without batteries 170 375 Battery stand, with 2 batteries 490 1080 Battery stand, with 3 batteries 650 1433 Output Voltage ry 6.6.2 The voltage range to the RBS cabinet is +20.2 - 29.0 V DC. +27.2 V DC Battery low voltage limit +21.0 V DC na 6.6.
PAGE 131
Product Data RBS 2206 or more battery strings. One string of +24 V batteries has four 6 V blocks. Further information regarding the BBS 2000 can be found in: Power Manual BBS 2000 6.6.5 K 1556-BZZ 208 06-101 Cable Connection Interfaces 6.7 ry See Section 6.3.2 +24 V DC Power Supply on page 112. Antenna System This chapter contains information about antenna configurations for outdoor cells.
PAGE 132
Product Data RBS 2206 Function The TMA compensates for signal loss in the receiver antenna cables, reduces system noise and improves uplink sensitivity. The TMA can consist of a duplex filter. Duplex is the function that allows communication in two directions (sending and receiving) on the same communication channel. The TMA used for 12 TRX products is Dual Duplex TMA (ddTMA).
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Product Data RBS 2206 The ddTMA is a narrow-band product and is available in a number of versions depending on the frequency band to be used. A bias-injector is used to feed the ddTMA with 15 V DC. The unit has two 7/16 socket connectors, see figure below.
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Product Data RBS 2206 6.7.2 Antenna System Connections 3 x 2 CDU-F Number of cells Type of CDU Number of TRX/cell Figure 63 ry P008302A CDU configuration key The various configurations available for cabinets are described using the following system: na In the example above, the cabinet is fitted with three CDUs, each connected to two TRXs; the total number of TRXs is thus six in this case. The CDU is type CDU-F.
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Product Data RBS 2206 Table 69 3x2 CDU-F and 3x4 CDU-F Cell CDU Connection Signal Labelling A 1 TX/RX TX/RX CellA:DX1 RX RX CellA:RXB TX/RX TX/RX CellB:DX1 RX RX CellB:RXB TX/RX TX/RX CellC:DX1 RX RX CellC:RXB 2 B 2 C 1x2 CDU-F • 2x2 CDU-F • 1x4 CDU-F • 2x4 CDU-F na • ry From the configuration in figure above, the following configurations can be derived: eli mi Cell A Pr DX1 Figure 65 2001-11-28 P2A P008229A Configuration scheme, 1x8 CDU-F Table 70 EN/LZT
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Product Data RBS 2206 Cell A DX2 Figure 66 na ry DX1 Configuration scheme, 1x12 CDU-F Table 71 1x12 CDU-F CDU Connection Signal Labelling A 1 TX/RX TX/RX CellA:DX1 eli mi Cell 3 TX/RX TX/RX Cell A RXB 134 (485) CellA:DX2 Cell B RXB DX1 Pr DX1 Figure 67 P008228A P008232A Configuration scheme, 2x6 CDU-F © Ericsson Radio Systems AB — All Rights Reserved — EN/LZT 720 0008 P2A 2001-11-28
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Product Data RBS 2206 Table 72 2x6 CDU-F CDU Connection Signal Labelling A 1 TX/RX TX/RX CellA:DX1 RX RX CellA:RXB TX/RX TX/RX CellB:DX1 RX RX CellB:RXB B 3 ry Cell Cell B na Cell A DX1 DX2 eli mi DX1 RXB Figure 68 P008230A Configuration scheme, 1x4+1x8 CDU-F Table 73 1x4+1x8 CDU-F Cell CDU Connection Signal Labelling A 1 TX/RX TX/RX CellA:DX1 RX RX CellA:RXB 2 TX/RX TX/RX CellB:DX1 3 TX/RX TX/RX CellB:DX2 Pr B EN/LZT 720 0008 2001-11-28 P2A © Eric
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Product Data RBS 2206 Cell A DX2 DX1 RXB Figure 69 na ry DX1 Cell B P008231A Configuration scheme, 1x8+1x4 CDU-F Table 74 1x8+1x4 CDU-F CDU Connection Signal Labelling A 1 TX/RX TX/RX CellA:DX1 B eli mi Cell 2 TX/RX TX/RX CellA:DX2 3 TX/RX TX/RX CellB:DX1 RX RX CellB:RXB GSM 900/1800 CDU-F, configurations with TMA Cell A TMA Pr TMA DX1 RXB TMA DX1 Cell B RXB Cell C TMA TMA DX1 RXB TMA P008260A Figure 70 136 (485) Configuration scheme, 3x2 CDU-F and 3x4 CD
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Product Data RBS 2206 Table 75 3x2 CDU-F and 3x4 CDU-F Cell CDU Connection Signal Labelling A 1 TX/RX TX/RX CellA:DX1 RX RX CellA:RXB TX/RX TX/RX CellB:DX1 RX RX CellB:RXB TX/RX TX/RX CellC:DX1 RX RX CellC:RXB 2 B 2 C • 2x2 CDU-F • 1x4 CDU-F • 2x4 CDU-F na 1x2 CDU-F Cell A eli mi • ry From the configuration in figure above, the following configurations can be derived: TMA Pr DX1 Figure 71 2001-11-28 P2A DX2 P008255A Configuration scheme, 1x8 CDU-F Table 7
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Product Data RBS 2206 TMA Cell A TMA DX2 Figure 72 na ry DX1 Configuration scheme, 1x12 CDU-F Table 77 1x12 CDU-F CDU Connection Signal Labelling A 1 TX/RX TX/RX CellA:DX1 3 TX/RX TX/RX CellA:DX2 eli mi Cell Cell A TMA TMA TMA DX1 Cell B TMA RXB Pr DX1 RXB Figure 73 138 (485) P008257A Configuration scheme, 2x6 CDU-F Table 78 2x6 CDU-F Cell CDU Connection Signal Labelling A 1 TX/RX TX/RX CellA:DX1 TX/RX TX/RX CellA:RXB TX/RX TX/RX CellB:DX1 RX RX Cel
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Product Data RBS 2206 Cell B Cell A TMA TMA TMA DX2 Figure 74 na ry DX1 RXB DX1 TMA Configuration scheme, 1x4+1x8 CDU-F Table 79 1x4+1x8 CDU-F CDU Connection Signal Labelling A 1 TX/RX TX/RX CellA:DX1 RX RX CellA:RXB eli mi Cell B P008259A 2 TX/RX TX/RX CellB:DX1 3 TX/RX TX/RX CellB:DX2 Cell B Cell A Pr TMA TMA DX1 DX2 TMA DX1 TMA RXB P008258A Figure 75 EN/LZT 720 0008 2001-11-28 P2A Configuration scheme, 1x8+1x4 CDU-F © Ericsson Radio Systems AB — All Ri
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Product Data RBS 2206 Table 80 1x8+1x4 CDU-F Cell CDU Connection Signal Labelling A 1 TX/RX TX/RX CellA:DX1 2 TX/RX TX/RX CellA:DX2 3 TX/RX TX/RX CellB:DX1 RX RX CellB:RXB B Cell A ry GSM 900/1800 CDU-G, configurations without TMA Cell C na Cell B DX1 DX2 DX1 DX2 eli mi DX1 DX2 Figure 76 P008223A Configuration scheme, 3x2 CDU-G and 3x4 CDU-G Table 81 3x2 CDU-G and 3x4 CDU-G Cell CDU Connection Signal Labelling A 1 TX/RX1 TX/RX CellA:DX1 TX/RX2 TX/RX CellA:D
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Product Data RBS 2206 Cell A DX2 TX2 Figure 77 na ry DX1 TX1 P008225A Configuration scheme, 1x8 CDU-G Table 82 1x8 CDU-G CDU Connection Signal Labelling A 1 TX/RX1 TX/RX CellA:DX1 eli mi Cell 2 TX/RX2 TX CellA:TX1 TX/RX1 TX/RX CellA:DX2 TX/RX2 TX Cell:ATX2 Pr Cell A DX1 TX1 TX2 TX3 DX2 TX4 P008226A Figure 78 EN/LZT 720 0008 2001-11-28 P2A Configuration scheme, 1x12 CDU-G © Ericsson Radio Systems AB — All Rights Reserved — 141 (485)
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Product Data RBS 2206 Table 83 1x12 CDU-G CDU Connection Signal Labelling A 1 TX/RX1 TX/RX CellA:DX1 TX/RX2 TX CellA:TX1 TX/RX1 TX CellA:TX2 TX/RX2 TX CellA:TX3 TX/RX1 TX/RX CellA:DX2 TX/RX2 TX CellA:TX4 2 3 ry Cell Cell B na Cell A TX1 TX2 DX1 DX2 eli mi DX1 DX2 P008224A Figure 79 Table 84 2x6 CDU-G CDU Connection Signal Labelling A 1 TX/RX1 TX/RX CellA:DX1 TX/RX2 TX/RX CellA:DX2 TX/RX1 TX CellA:TX1 TX/RX2 TX CellA:TX2 TX/RX1 TX/RX CellA:DX1 TX/RX
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Product Data RBS 2206 GSM 900/1800 CDU-G, configurations with TMA Cell A TMA DX1 TMA DX1 Figure 80 DX1 B C TMA DX2 P008261A 3x2 CDU-G and 3x4 CDU-G CDU Connection Signal eli mi A TMA Configuration scheme, 3x2 CDU-G and 3x4 CDU-G Table 85 Cell DX2 na DX2 TMA ry TMA Cell C Cell B 1 2 3 Labelling TX/RX1 TX/RX CellA:DX1 TX/RX2 TX/RX CellA:DX2 TX/RX1 TX/RX CellB:DX1 TX/RX2 TX/RX CellB:DX2 TX/RX1 TX/RX CellC:DX1 TX/RX2 TX/RX CellC:DX2 From the configuration above
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Product Data RBS 2206 Cell A TMA Figure 81 DX2 TX2 na DX1 TX1 ry TMA P008233A Configuration scheme, 1x8 CDU-G with TMA Table 86 1x8 CDU-G CDU Connection Signal Labelling A 1 TX/RX1 TX/RX CellA:DX1 TX/RX2 TX CellA:TX1 TX/RX1 TX/RX CellA:DX2 TX/RX2 TX Cell:ATX2 eli mi Cell 2 Cell A Pr TMA DX1 TX1 TMA TX2 TX3 DX2 TX4 P008262A Figure 82 144 (485) Configuration scheme, 1x12 CDU-G © Ericsson Radio Systems AB — All Rights Reserved — EN/LZT 720 0008 P2A 2001-11-28
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Product Data RBS 2206 Table 87 1x12 CDU-G CDU Connection Signal Labelling A 1 TX/RX1 TX/RX CellA:DX1 TX/RX2 TX CellA:TX1 TX/RX1 TX CellA:TX2 TX/RX2 TX CellA:TX3 TX/RX1 TX/RX CellA:DX2 TX/RX2 TX CellA:TX4 2 3 ry Cell Cell B Cell A TMA TMA na TMA TX1 TX2 DX1 DX2 eli mi DX1 DX2 Figure 83 2x6 CDU-G Cell CDU Connection Signal Labelling A 1 TX/RX1 TX/RX CellA:DX1 TX/RX2 TX/RX CellA:DX2 TX/RX1 TX CellA:TX1 TX/RX2 TX CellA:TX2 TX/RX1 TX/RX CellA:DX1 TX/
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Unit Description, DXU-21 7 Unit Description, DXU-21 This chapter describes DXU-21. The DXU is a CPU, which acts as an interface between the transmission network and the transceivers. It also extracts timing information from the PCM link and generates a timing reference for the RBS. The DXU also performs supervisory tasks. The DXU-21 transmission interface has long haul capability and can be run on both 1.544 Mbit/s (T1) and 2.048 Mbit/s (E1) PCM links. 7.
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Unit Description, DXU-21 7.2 Block Diagram DXU 13 MHz test Compact Flash Card Interface Part of timing system OVCXO+DAC OPT-inputs OPT-outputs External alarms ry CPU System Vcc for backplane memory MMI IOM-bus Ext. Sync. Source (GPS) Ext. Sync. Source (ESB) na Cabinet LEDs Rack/Shelf/unit pos Ext. Ref source Ext. O&M (EOM) O&M Terminal (OMT) Transm. lines G.703-A G.703-B G.703-C G.703-D Transm.
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Unit Description, DXU-21 • 7.2.1 Compact Flash Card CPU System The heart of the DXU-21 is a 32–bit embedded controller with a PPC 405 processor core with interfaces to a wide range of peripherals. The CPU system consists of: 2 I C controller • Ethernet 10/100 Mbit/s (full-duplex) controller, MAC • SDRAM memory • FLASH memory • ASIC GARP • Compact Flash Card na ry • 7.2.2 Communication Switch System This system block contains circuits that handle traffic between the BSC and the TRUs. 7.
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Unit Description, DXU-21 7.3 Functions The DXU serves as the Central Main CPU node and its main functions are: • Handles incoming traffic, controls and supervises information and sends it to its destination within the RBS. • Provides frequency reference signals and clock signals for circuits within the RBS. • Stores and executes RBS SW. SW is stored on a removable flash card. • Controls the climate and power system.
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Unit Description, DXU-21 The DXU is tested for Electro Magnetic Compability (EMC) and complies with the following standards: • Fast transient test: EN 301 489-1, 0.5 kV • Surge test: ITU-T K.45 Test no. 2.1.1.a (CM), basic level: 1.5 kV Test no. 2.1.1.b (DM), basic level: 1.5 kV External Alarm Inputs ry An EMC environment exceeding the above values requires additional overvoltage protection of the G.703 interface. Through this interface it is possible to connect up to 16 binary alarms.
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Unit Description, DXU-21 IOM-Bus 2 This interface consists of three individual I C ports. It is accessed through the lower backplane connector and is used to communicate with the CDU, CXU and cabinet ID. 2 An I C bus is reserved for reading a memory device which identifies the source for the system. The interface is accessed through the lower backplane connector. Y-Links ry This interface is used for communication with the dTRUs and sTRUs. The Y-interface consists of 12 separate Y-links.
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Unit Description, DXU-21 ESB This interface is used to synchronize several transceiver groups in the same cell, for example when one cell is built up by more than one RBS, or one cell is split between two RBSs. Note that a master-slave configuration, as in RBS 2202, is regarded as one transceiver group. The interface is accessed on the front of the DXU through a D-sub 9–pin male connector marked "ESB". 7.4.1 OMT ry The OMT port is used to communicate with the Operation and Maintenance Terminal.
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Unit Description, DXU-21 7.4.3 Indicators and Buttons There are 11 indicators located on the front panel (as shown in the table below) and two buttons for DXU Reset and Local/remote. For further information on indicators, see chapter Operation and Maintenance Support. Table 90 Indicators Colour Fault Red Operational Green Transmission OK (port A, B, C, D) Green (4 pcs) ry Indicator Local Yellow Yellow RBS fault External alarm Yellow Yellow na EPC bus fault EOM bus fault 7.
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Unit Description, dTRU 8 Unit Description, dTRU The dTRU (double Transceiver Unit) is a 2-TRX replaceable unit. A TRX is a transmitter/receiver and signal processing unit which transmits and receives one carrier. There are different versions of dTRU depending on the frequency band and modulation method, that is only GMSK or EDGE. The dTRU has two transmit antenna terminals and four receive antenna terminals. The dTRU features a built-in hybrid combiner.
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Unit Description, dTRU • CPU-system • DSP-system • RC-system • Radio system CPU System ry The CPU system is a control unit in the RBS. Basically it consists of a CPU, support logic, memory and logic for handling the interfaces. DSP System na The DSP system performs all baseband signal processing necessary for one TRX. For downlink, this includes Terrestrial Protocol Handling (TPH), encoding, ciphering and burst generation. For uplink it includes equalization, combining, decoding and TPH.
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Unit Description, dTRU 8.3 External Interfaces View of backplane ry dTRU eli mi na Y-link/-TX control bus Figure 88 Power connector P007454A dTRU, front panel and backplane The dTRU has the following external interfaces: • • 8.3.
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Unit Description, dTRU Table 92 8.3.2 Indicators Indicator Colour Fault Red Operational Green RF off Yellow Local mode Yellow The Backplane Technical Data Table 93 dTRU technical data Height na 8.4 ry The Y-link, CDU-TX control bus, system voltage and connectors are located on the backplane. See Figure 88 on page 157. 400 mm (9 HE x 44.45 mm) Width 71 mm (14 TE x 5.08 mm) 270 mm Depth Weight 8 kg 485 W Max. heat generation TBD Pr eli mi Max.
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Unit Decription, CDU-G and CDU-F 9 Unit Decription, CDU-G and CDU-F This chapter describes the CDU-F and CDU-G for RBS 2206. The Combining and Distribution Unit (CDU) is the interface between Transceivers (TRUs) and the antenna system. The CDU enables several TRUs to share antennas. A range of CDU types have been developed to support different configurations. Information about which configurations can be built with the various types of CDU is contained in chapter Radio Configurations, RBS 2206. 9.
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Unit Decription, CDU-G and CDU-F TX Part Description CDU-G consists of two identical TX chains. The TX part contains a lowpass filter and a duplex filter. The lowpass filter secures the required reverse isolation. It also reduces spuriouses from the transmitter on the frequencies higher than the TX band. The duplex filter (DPX) allows using a single antenna for both transmitting and receiving. ry There is an Measurement Coupler Unit (MCU) between the DPX and antenna connector.
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Unit Decription, CDU-G and CDU-F 9.1.2 CDU-F P007450B eli mi na ry CDU-F Figure 91 CDU-F CDU-F has four filter cavities grouped internally two and two. The two filters form a combiner for two TX signals and can be combined with a CNU to a combiner for four signals, or connected to another CDU to form a combining network for six signals. The combined signals are fed through a lowpass TX filter to a duplex filter.
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Prin1 Prin2 Unit Decription, CDU-G and CDU-F TX1-1 CNU TX1-1+TX1-2 TXLP FC TX1-2 MCU TXBP-DPX TX/RX TX2-1 RXBP-DPX ry RXBP TX2-2 MR RX2 na RX1 LNA TXin CDU bus DC in Prin1 Prin2 CPU RX Power supply supervision TX2-1+TX2-2 Figure 92 Pr1out Pr2out Pr1out Pr2out DC CXU P007451A Block diagram of CDU-F eli mi The tuning of the filter cavities is controlled by a measurement receiver and a CPU unit.
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Unit Decription, CDU-G and CDU-F 9.
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Unit Description, CXU-10 10 Unit Description, CXU-10 The Configuration Switch Unit (CXU) is a unit that distributes the RX signals from the CDU to the dTRU within the same RBS. The CXU supports both GMSK and 8-PSK. One CXU can support up to three CDUs. To configure the CXU, six switches can be set to connect different CDUs with different dTRUs. A block diagram of the CXU is shown in the figure below. The CXU is a multi-band product, which means it can be used for GSM 800, GSM 900, GSM 1800 and GSM 1900.
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Unit Description, CXU-10 The CXU is also connected to a CDU bus. By sending data through the CDU bus, the switches can be set to fulfil one of six supported configurations. Inside the CXU there are also some splitters to distribute the incoming RX-signals to the switches and in some cases directly to an output. The RF cables between CDU-CXU and CXU-dTRU are supervised. 10.
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Unit Description, TMA-CM 11 Unit Description, TMA-CM The Tower Mounted Amplifier Control Module (TMA-CM), together with the Bias Injectors, supplies power to the Tower Mounted Amplifiers (TMA). It can also monitor and control the TMAs. Block Diagram IOM Bus x x x x x x x x Indicator Control DC/DC Converter na TMA Support Fault Oper. TMA1 TMA2 TMA3 TMA4 TMA5 TMA6 Indicators ry 11.1 TMA1 TMA2 TMA3 TMA4 TMA5 TMA6 eli mi Measurement +24V DC Figure 95 11.
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Unit Description, TMA-CM The TMA is always used together with its connection cable and connection plate for Bias injectors. The connection plate contains filtering equipment. An indicator on the front panel is lit for each TMA in operational mode. Whether an indicator is lit dpeends also on the actual configuration, see Chapter Radio Configurations, RBS 2106 and RBS 2206. If the TMA or the feeder cable is short-circuited, the TMA-CM limits the current to 500 mA. External Interfaces na 11.
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Unit Description, TMA-CM 11.4 Indicators The TMA-CM has eight indicators on the front panel that shows the status of each TMA and the status of the TMA-CM. The indicators Fault and Operational indicate the status of the TMA-CM only, not the status of the TMAs.
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Unit Description, ASU 12 Unit Description, ASU This chapter describes the Antenna Sharing Unit (ASU). Antenna sharing is part of co-siting, that is, using another cabinet together with a GSM cabinet in the same sector. The ASU allows a TDMA (or other) cabinet and a GSM cabinet to share RX antennas. It does this by sharing the RX signals, which come from the CDU, between both cabinets. The ASU is a broadband product, which means that it covers 800–1910 MHz. Block Diagram ry 12.1 Ant.
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Unit Description, ASU Antenna connection fields CDU ASU 12.1.2 P008375B ASU location in the RBS 2206 eli mi Figure 98 na ry CXU Couplers The ASU consists of 6 couplers, performing the following functions: • • • • • 200 resistor to ground for cable supervision purposes Directional coupler Attenuator Switch to select between high and low attenuation Built-in overvoltage protection Pr A schematic view of one coupler is shown Figure 99 on page 173.
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Unit Description, ASU DC-isolation ANT S.n RBS 2206/2106 ASU/6 CDUn RXn Co-sited RBS RXBP CXUn RXn ry MCU TMA/NO TMA The ASU contains 6 of these boxes 12.1.3 na Figure 99 P008374B Schematic view of a coupler ASU Switch 12.2 eli mi The ASU has one common switch to set the attenuation in the 6 couplers. Functions The general function of the ASU is to take a small portion of the RX signal and send that to the co-sited RBS. The ASU also performs the following: • 12.2.
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Unit Description, ASU TX/RX TX TX/RX CDU ASU CXU RXA ry dTRU 12.2.2 TX Co-sited RBS RX signal path na RBS 2206/2106 Figure 100 RXB P008373A Cable Path and Supervision 12.3 eli mi The RF cables between the ASU and the co-sited RBSs can be supervised by the TMA support function in the TDMA cabinet. External Interfaces The ASU has the following connectors: • • • six output ports for RX signals to the CXU six output ports for RX signals to the co-sited RBS power supply connector.
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Unit Description, ASU Table 101 ASU connection ports Labelled on ASU Connects to 1 Ant.S1 antenna sharing connectors (left side), position 1 2 CDU1 RX1 CDU 1, port RX1 3 RX1 CXU, port 3 4 RX2 CXU, port 4 5 CDU1 RX2 CDU 1, port RX2 6 Ant.S2 antenna sharing connectors (left side), position 2 7 Ant.S3 antenna sharing connectors (left side), position 3 8 CDU2 RX1 CDU2, port RX1 9 RX1 10 RX2 11 CDU2 RX2 CDU 2, port RX2 12 Ant.
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Unit Description, ASU 2 5 3 1 6 na ry 4 eli mi ASU Figure 102 12.3.1 P008471A Antenna sharing connectors Indicators and Buttons There is one switch on the front panel to set the internal attenuators for TMA or no TMA. There are two indicators on the front inducating the status of the ASU. ASU status indicators Pr Table 102 12.
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Unit Description, ASU Pr eli mi na ry The ASU protrudes 40 mm from the rack (including the front panel).
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Unit Description, FCU-01 13 Unit Description, FCU-01 The Fan Control Unit (FCU) controls and supervises the fans in the RBS 2206. It is the MMI for the fans, that is, it has indicators for fan status information. The FCU is connected to the EPC-bus that handles communication for the climate and power function in the RBS. The interface towards the EPC-bus consists of an optical fibre interface. The interface towards each fan consists of one variable DC voltage output for the power feed and one alarm input.
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Unit Description, FCU-01 The FCU has the following external interfaces: 13.3 • Power in • EPC-bus in • EPC-bus out • Fan power and alarm (1 – 4) Indicator Table 104 ry The FCU has seven LED indicators that show the status of the FCU, its communication and fan status. Indicator Indicator Colour Fault Red Green na Operational Yellow EPC-bus fault Red Fan 1 fault Fan 2 fault Red Fan 3 fault Red Red eli mi Fan 4 fault 13.4 Electrical Data 13.4.
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Unit Description, FCU-01 Table 107 Alarm pos. Upos 5 - 30 V DC Alarm neg. Uneg < Upos - 2.4 V DC Current Ino_alarm 5 - 20 mA Table 108 Alarm 5 - 30 V DC Alarm neg. Uneg < 2 V DC Current Ialarm < 5 mA Dimensions and Weight Table 109 ry Alarm pos. Upos FCU-01 dimensions and weight Height Width Depth 98 mm 45 mm 0.5 kg Pr eli mi Weight 195 mm na 13.4.
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Unit Description, DC-Filter 01 14 Unit Description, DC-Filter 01 The DC-filter is the interface for +24 V DC supply to the cabinet. It distributes +24 V DC to the Internal Distribution Module (IDM). 14.1 Functions The DC-filter has the following functions: • Capacity for incoming power cables between 70 – 150 mm • Protection for incoming cables from pulling forces • Power connection for internal distribution External Interfaces 2 ry EMC filter eli mi na 14.
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Unit Description, DC-Filter 01 14.4 Dimensions and Weight Table 111 FCU-filter-01 dimensions and weight 293.5 mm Width 164 mm Depth 70 mm Weight 6 kg (incl.
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Unit Description, PSU 1200 W 15 Unit Description, PSU 1200 W This chapter describes the Power Supply Unit (PSU) which is available in two versions: PSU AC and PSU DC. The PSUs constantly regulate and deliver 1200 W off power over the whole output range from 22 to 29 V DC. 15.1 PSU AC Bridge Boost DC/DC na AC Mains Output Filter Block Diagram Input Filter 15.1.1 ry The PSU rectifies the incoming AC power to the regulated DC voltage required.
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Unit Description, PSU 1200 W Boost Converter Draws a sinusoidal input current in phase with the input voltage, enabling the power supply to have a high power factor and low distribution on input current. The output from the boost converter is 400 V DC. DC/DC Converter A phase-shifted, soft-switched, full-bridge converter that converts the incoming 400 V DC to 24 V DC output voltage.
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Unit Description, PSU 1200 W Input mains fault • Input undervoltage • Input overvoltage • Output overvoltage hardware alarm • Output overvoltage software alarm • High internal temperature • Power limit • Short circuit/overload for more than one minute Voltage Adjustment ry • na The desired value of the output voltage of the rectifier is set by the ECU function in the DXU. The PSU has a default value of 27.2 V.
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Unit Description, PSU 1200 W 15.1.3 External Interfaces PSU-AC Fault Operationa l EPC-bus na TD ry OUTPUT +27.2 VDC 1200 W eli mi RD INPU T 120-2 5 50/60 0 VAC Hz 12A Figure 106 P007124A PSU AC The PSU has the following external interfaces, all located on the front: input 120 – 250 V AC Pr • • output +27.2 V DC • EPC Bus (Opto) Note: 15.1.4 The PSU has no backplane connections.
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Unit Description, PSU 1200 W Table 112 Colour Fault Red Operational Green EPC bus fault Yellow Input Data Table 113 Input data Nominal input voltage 120 to 250 V AC ry 15.1.5 Indicator 1) Permitted variation input voltage 108 Frequency 45-65 Hz Current to 275 V AC < 8A (at 180 - 275 V AC) na <12 A (at 108 - 140 V AC) < 30 A peak Inrush current Internal fuse 15 A (slow) > 83% Efficiency cos ϕ > 0.95 Power factor Non-destructive voltage eli mi Pulses < 20 ms 300 V AC Max.
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Unit Description, PSU 1200 W 15.2 PSU DC The PSU DC converts incoming voltage ranging from -39 V to -72 V DC to the regulated DC voltage that is required. DC/DC DC Output ry DC Input Output Filter Block Diagram Input Filter 15.2.
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Unit Description, PSU 1200 W Control and Supervision Circuits The control and supervision circuits support: • load sharing between parallel units • remote on/off • alarms 15.2.2 Functions ry The output voltage can be adjusted between 22 V to 29 V DC. The control and supervision is achieved through an optical signal interface connector on the front of the PSU.
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Unit Description, PSU 1200 W Load sharing is achieved by the DXU function when using more than one PSU, load sharing of parallel PSUs is achieved by adjusting the individual voltages to each PSU in the system. Output voltage from the PSU is adjusted to between 26.2 V and 28.5 V depending on battery temperature. Power Limitation When the temperature exceeds the permissable value, the PSU reduces the power and an alarm is sent to the DXU.
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Unit Description, PSU 1200 W • input -48/-60 V DC • output +27.2 V DC • EPC Bus (Opto) Note: 15.2.4 The PSU has no backplane connections. Indicators There are three indicators located on the front panel: ry Table 116 Indicator Colour Fault Red Operational Green Yellow 15.2.5 Input Data Input data Nominal input voltage (-48) - (-60) V DC Permitted variation input voltage (-39) - (-72) V DC eli mi Table 117 15.2.
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Unit Description, PSU 1200 W 15.2.7 Dimensions and Weight Table 119 DC-DC Converter dimensions and weight 262 mm Width 61 mm Depth 225 mm Weight 3.
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Unit Description, ACCU/DCCU 16 Unit Description, ACCU/DCCU This chapter describes the AC Connection Unit (ACCU) and the DC Connection Unit (DCCU). They distribute primary power to the PSUs. There is only one ACCU or DCCU in the cabinet, depending on the type of incoming power. 16.1 ACCU The ACCU consists of a box with: • Eight-pole main switch (disconnecting device) • One EMC filter • Four cables to the PSUs Functions ry Terminal block for incoming AC cables na 16.1.
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Unit Description, ACCU/DCCU • Terminal block for incoming AC mains cables • Four outgoing cables to the PSUs Input Data Table 120 45 - 65 Hz Voltage 90 - 275 V AC External fuses 4 pcs, max. 16 A Cable diameter 8.5 - 12.5 mm ry Frequency 2 1.5 - 2.5 mm Conductor area Number of conductors 3 (L, N, PE) na Output Data Four cables with connectors according to IEC 320 and matching the PSU AC inlet. Table 121 Conductor area 16.1.3 eli mi Number of conductors 1.
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Unit Description, ACCU/DCCU External Interfaces ry 16.2.2 eli mi na DCCU Figure 110 P007833A DCCU The DCCU has the following interfaces: • • Terminal block for four incoming DC supply cables Four outgoing cables to the PSUs Input Data Table 123 Input data - (40 - 72) V DC External fuses 4 pcs, max. 40 A Pr Voltage Cable diameter 4.5 - 7 mm Conductor area 6 - 10 mm Number of conductors 2 2 Output Data Four cables with connectors matching the PSU DC inlet.
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Unit Description, ACCU/DCCU 16.2.3 Dimensions and Weight Table 125 293.
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Unit Description, ACCU-02 17 Unit Description, ACCU-02 This chapter describes the AC Connection Unit for RBS 2106 (ACCU02). ACCU-02 distributes and supervises the incoming AC mains to the units in the RBS cabinet. ACCU-02 consists of two units, a Connection Unit and a Distribution Unit. The units are connected together with a power cable and a signal cable. ry EPC BUS Distribution Unit na PSU 4 PSU 3 PSU 2 PSU 1 Climate Unit Block Diagram Service outlet 17.
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Unit Description, ACCU-02 • One Service outlet, protected by a 10 A circuit breaker with residual current breaker • Two DC outputs for cabinet lighting and auxiliary equipment, protected by 1 A circuit breakers • Rectifier for supply of Control Unit • Voltage Regulator for supply of Control Unit and DC outputs from +24 or -48 V DC • Relays which provide possibility to turn on and off the PSU outputs • Control Unit Functions Distributes AC power to the PSUs and makes it possible to connect and
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Unit Description, ACCU-02 17.4 External Interfaces ry Distribution unit eli mi na Cable Figure 112 17.4.1 Connection unit P008482A ACCU-02 Input Data The input terminals accept supply cables with conductor area of 4 - 16 mm². Pr Maximum allowed fuse rating is 63 A per phase.
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Unit Description, ACCU-02 Table 128 AC supply 60 Hz Single-phase, three-wire, earthed mid-point 200/100 V AC to 240/120 V AC 1) Three-phase star, four-wire , earthed neutral 208/120 V AC to 220/127 V AC 1) It is also possible to supply the ACCU with a three-phase, five-wire system (separate neutral and earth conductors). Table 129 Voltage Range Max. Current +24 V DC +18 to +32 V DC 1A -48 V DC -39 to -60 V DC 0.
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Unit Description, ACCU-02 17.5.
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Unit Description, BFU-21 and BFU-22 18 Unit Description, BFU-21 and BFU-22 The Battery Fuse Unit (BFU) monitors and controls the battery. It cuts off the load (the RBS) at low battery voltage, when the temperature of the battery is too high or if there is a short circuit between the distribution cables. Block Diagram Shunt Battery ry 18.
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Unit Description, BFU-21 and BFU-22 Shunt Contactor 200A Battery RBS DC distribution TM and EC Contactor supply TM EPC bus (opto) P008644B Block diagram of BFU-22 eli mi Figure 114 na Supervision Module ry 50A The BFU consists of the following blocks: • • • • • Contactors Circuit breakers Shunt TM and EC supply Supervision module Contactor Pr The Contactor is used to disconnect the batteries from the system. The Supervision Module controls the Contactor.
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Unit Description, BFU-21 and BFU-22 BFU-22 has one high-power TM output for supply of transmission equipment. 18.2 Functions The BFU supplies battery backed-up system voltage to the RBS and disconnects the battery when it has reached its lower discharge limit. The Contactor can disconnect and connect the battery with a control signal from the Supervision Module (SM). ry The BFU can supply priority power to transmission equipment.
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Unit Description, BFU-21 and BFU-22 BFU-22 + BFU-22 P008642A na Figure 116 ry -- • Battery • RBS DC distribution • TM supply 50 A (only BFU-22) • eli mi The BFU has the following external interfaces: • • • 18.3.1 TM1 supply 15 A (only BFU-21) TM2 supply 15 A (only BFU-21) EC supply 2 A (only BFU-21) EPC bus Indicators and Buttons On the front panel there are four indicators (see the following table) and four switches.
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Unit Description, BFU-21 and BFU-22 • Battery Disconnect - on/off • DC out - on/off 18.4 Technical Data 18.4.1 Input Data Table 135 Input data +24 V DC negative ground Permitted variation input voltage +18.0 to +29.0 V DC Non-destruction input voltage Power Maximum input current Output Data 200 A 220 A 48 Ap-p na Maximum current ripple (20 Hz - 20 kHz) Table 136 0.0 to +32.0 V DC 4800 W Nominal input current 18.4.
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Unit Description, IDM 19 Unit Description, IDM This chapter describes the internal Distribution Module that distributes +24 V DC to all DC powered units in the RBS. Distribution circuits are protected by circuit breakers. The IDM consists of a unit with 21 circuit breakers, four PSU cables and connectors to the different DC powered units. 19.1 Functions The IDM has the following functions: • Provides fused power distribution to the DC powered units.
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Unit Description, IDM Table 139 Function P3 DC out P4 Climate unit P5 Fan 1 - 4 P6 TRU 1 P7 TRU 2 P8 CDU 1 P9 TRU 3 P10 TRU 4 P11 CDU 2 P12 TRU 5 P13 TRU 6 na ry Connector P14 CDU 3 P15 CXU 1 P16 CXU 2 P17 OXU 5 P18 eli mi 19.3 DXU/System voltage sensor/OXU 1 - 4 P19 Test connector P20 Indicator Indicators and Buttons Located on the front panel are one green indicator and 21 circuit breakers. The function of the circuit breakers can be read on the front panel.
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Unit Description, IDM Table 142 Circuit breaker capacity Capacity Qty CXU 1 - 2, OXU 5 5A 1 Fan 1 - 4 5A 4 OXU 1 - 4 5A 4 DXU 5A 1 CDU 1 - 3 5A 3 DC out 15A 1 TRU 1 - 6 30A 6 30A Climate unit Dimensions and Weight Table 143 Dimensions and weight Height Width Depth 133 mm 483 mm 80 mm 5 kg Pr eli mi Weight 1 na 19.
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Unit Description, RBS 2106 Climate Unit 20 Unit Description, RBS 2106 Climate Unit The climate unit maintains the internal environment regarding temperature and humidity within allowed ranges for the units inside the cabinet. The climate unit is mounted in the door of the cabinet. RBS 2106 can be equipped with two types of climate units: One Combined climate unit, or • One Air-to-air heat exchanger Combined Climate Unit na ry 20.
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Unit Description, RBS 2106 Climate Unit 20.1.
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Unit Description, RBS 2106 Climate Unit Heater The heater is placed in the internal air circuit and heats the air if the ambient temperature is too low for start up. Climate Control Unit (CCU) The CCU is a processor based plug-in unit, controlling and supervising the climate unit. It has a set of default operating parameters, which can be overridden by loaded parameters.
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Unit Description, RBS 2106 Climate Unit Active Cooler The liquid cooling media passes through a reducing valve, where it evaporates to a cold low-pressure gas. This gas flows through the evaporator and cools it. The inside air that has passed the heat exchanger is blown through the evaporator, cooled and returned to the cabinet subracks. The compressor compresses the cooling media to a liquid state again in the condenser. The cooling media and the condenser becomes hot in the process.
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Unit Description, RBS 2106 Climate Unit The test button on the front panel activates the test function. After the test has been completed, the indicators will present the status during two minutes. No alarm is sent if there is a malfunction. It is possible to change the behaviour of the climate unit by sending a set of parameters to the CCU through the EPC-bus.
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Unit Description, RBS 2106 Climate Unit Indicators, Buttons and Test Connector CCU FAUL T OPER ATION View of Backplane HEAT FAUL T INT.FA N EXT.F AN PWR.F AULT EPC BU S ACT.C OOLFAN ry ACT.C OOL eli mi na TEST Figure 120 P008423A CCU On the CCU front panel there are nine indicators (see the following table), a test button and a test and general signal connector.
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Unit Description, RBS 2106 Climate Unit 20.1.4 Technical Data Table 145 Electrical data Max. AC power consumption 2300 W (at 230 V 50 Hz) Max. DC power consumption 450 W Mechanical data Height 1250 mm Width 1050 mm Depth 250 mm Weight ry Table 146 105 kg Cooling capacity: heat exchanger and active cooler 5.3 kW Active cooler external air flow ≈ 700 m³/h ≈ 800 m³/h na Heat exchanger external air flow 20.2 Air-to-Air Heat Exchanger Pr eli mi Will be described later.
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Broadcast 21 Broadcast Broadcast denotes the RBS resources used for transmission of Synchronisation Information and System Information. The RBS supports: Broadcast of Synchronisation Information on SCH and FCCH • Broadcast of System Information 1, 2, 2bis, 2ter, 2quater, 3, 4 and 13 on BCCH • Broadcast of System Information 2quater, 7, 8, 13, 16 and 17 on BCCH Extended • Broadcast of System Information 5, 5bis, 5ter and 6 on SACCH (SACCH Filling) ry • 21.1 References GSM:04.06 GSM:04.18 GSM:05.
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Broadcast • (v) FCCH + SCH + BCCH + CCCH + SDCCH/4 (0..3) + SACCH/C4 (0..3) Transmission on FCCH is in accordance with GSM:05.02. Transmission on SCH means transmission of Base Station Identity Code (BSIC) and Reduced Frame Number (RFN) in accordance with GSM:05.02, GSM:05.03 and GSM:04.18. The BSIC value is a configuration parameter received from the BSC. 21.3.2 Reception of BCCH_INFORMATION from BSC ry By means of the BROADCAST INFORMATION MODIFY procedure GSM:08.
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Broadcast TC = 0 System Information type 3 is sent, if type 1 is not loaded from the BSC. TC = 4 System Information type 3 is sent, if: - only one of the types 2bis, 2ter and 2quater is loaded and type 13 is not loaded. - none of the types 2bis, 2ter and 2quater are loaded and type 13 is not loaded.
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Broadcast 21.3.4 Reception of SACCH_FILLING from BSC By means of the SACCH FILLING INFORMATION MODIFY procedure GSM:08.58, the BSC sends System Information 5, 5bis and 6 to be used on all SACCHs handled by a transceiver (TRX). The RBS supports: • Interpretation and check of the SACCH_FILLING message from the BSC • Storage and update of System Information 5, 5bis and 6 from the BSC ry System Information is included in the SACCH_FILLING used for all SACCHs in one TRX.
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Broadcast Table 149 SACCH System Information schedule Stored System Information 5bis 5ter 6 * 5, 5... * * * * 6, 6... * 5, 5, 6... * 5bis, 5bis... * 5, 5bis... * * * * * * 5, 5ter... * * * * * * * * * * * * 6, 5ter... 5, 5ter, 6... 5bis, 5ter... 5, 5bis, 5ter... * 5bis, 5ter, 6... * 5, 5bis, 5ter, 6... eli mi * 5ter, 5ter... * * 5, 5bis, 6... na * 6, 5bis...
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Common Control Channel Handling 22 Common Control Channel Handling "Common Control Channel Handling" denotes the RBS resources utilised for traffic on the Common Control channel. 22.1 References /GSM:04.08/ /GSM:08.58/ /GSM:05.03/ ry /GSM:05.02/ 22.2 Function 22.2.1 Paging na Whenever a reference is made to a function described in another chapter, please refer to the table of contents to find the appropriate chapter. By means of the PAGING procedure /GSM:08.58:5.
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Common Control Channel Handling 22.2.2 Immediate Assign By means of the IMMEDIATE ASSIGNMENT procedure / GSM:08.58:5.7./, the network signals acceptance or rejection of a CHANNEL_REQUEST message from MS.
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Common Control Channel Handling However, if more than one IA is sent in the same IMMEDIATE_ASSIGNMENT_EXTENDED message on air interface, the same number of IMMEDIATE_ASSIGNMENT_SENT messages should be sent on Abis. 22.2.4 CCCH Dequeuing and Transmission Downlink CCCH capacity is used for PAGING as well as for access grant (IMMEDIATE ASSIGN).
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Common Control Channel Handling • The CCCH queue system is used for system information 7, 8, 13, 16 and 17 for transmisstion on BCCH extended.
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Common Control Channel Handling Page mode extended makes it possible for the RBS to transmit pagings (IMSIs or TMSIs) or immediate assigns for a certain paging group when the next but one paging group is scheduled /GSM:04.08:3.3.2.1/. The "Page Mode" element (of the PAGING_REQUEST or IMMEDIATE_ASSIGNMENTs messages), set to extended Paging, is sent as an indication to the MS to be prepared to handle extended Paging as described above.
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Common Control Channel Handling Dummy Paging Whenever no PAGING_REQUEST or IMMEDIATE_ASSIGNMENT message is scheduled for transmission in a CCCH block, a Dummy Paging message is used. The message used for Dummy Paging is a PAGING_REQUEST type 1 /GSM:04.08:9.1.22./. Administration Table 150 Supported Values Description BS_AG_BLKS_RES 0-1 Number of blocks in each 51 TDMA frame multiframe reserved for AGCH / GSM:05.02:3.3.2.3/ /GSM:05.02:6.5.1/.
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Common Control Channel Handling 50 ms are discarded. Stored messages are transferred in the same order as they arrive from MS. Emergency calls have precedence over temporarily stored messages. Each accepted CHANNEL_REQUEST is reported to BSC as a CHANNEL_REQUIRED message according to /GSM:08.58:8.5.3/. 22.3 Operational Conditions 22.3.
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Physical Channel Handling 23 Physical Channel Handling "Physical Channel Handling" covers the traffic services provided by the physical layer in the RBS for the air interface. 23.1 References /GSM:05.02/ /GSM:05.03/ 23.2 Functions 23.2.1 Supported Burst Types ry Whenever a reference is made to a function described in another chapter, please refer to the table of contents to find the appropriate chapter.
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Physical Channel Handling Slow Associated Control Channel, half rate traffic SCH Synchronization Channel SDCCH/4 Stand-Alone Dedicated Control Channel/4 SDCCH/8 Stand-Alone Dedicated Control Channel/8 TCH/F Traffic Channel, full rate TCH/H Traffic Channel, half rate TCH/FD Traffic Channel, full rate, uni-directional, multislot configuration. SACCH/M Slow Associated Control Channel, full rate traffic, multislot configuration.
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Physical Channel Handling − a) SDCCH/8[0..7] + SACCH/C8[0..7] − b) SDCCH/8[0,1,3..7] + SACCH/C8[0,1,3..7] + CBCH • (viii) TCH/F + FACCH/F + SACCH/M • (ix) TCH/F + SACCH/M • (x) TCH/FD + SACCH/MD CCCH = PCH + RACH + AGCH. Note: Channel Combinations (v) and (vii) type b, are valid only when SMS Cell Broadcast is configured. In case of Channel Combination (vii), CBCH is only allowed for TN (Timeslot Number)=0..3. Note: Channel Combinations (iv) and (v) must be configured for TN=0.
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Physical Channel Handling /GSM:05.03:5/ 23.2.7 Packet Switched Channels De-interleaving De-interleaving (uplink) is performed according to: Traffic Channels /GSM:05.03:4/ Control Channels /GSM:05.03:5/ Packet Switched Channels Burst Assembly ry 23.2.8 /GSM:05.03:3/ Burst Assembly is performed according to: Normal bursts /GSM:05.02:5.2.4/ Frequency correction bursts /GSM:05.02:5.2.5/ /GSM:05.02:5.2.6/ /GSM:05.02:5.2.
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Speech and Data Services 24 Speech and Data Services This chapter covers speech and data services, as well as the handling of the link between the RBS and the RTC (Remote TransCoder) when neither speech nor data is present. References GSM 03.05 Phase 2 Ver 4.0.0 /GSM:08.20/ GSM 08.20 Phase 2 Ver 4.1.0 /GSM:08.54/ GSM 08.54 Phase 2 Ver 4.0.0 /GSM:08.58/ GSM 08.58 Phase 2 Ver 4.2.0 /GSM:08.60/ GSM 08.60 Phase 2 Ver 4.1.0 /GSM:08.61/ GSM 08.61 Phase 2 Ver 4.1.0 /GSM:11.20/ ry /GSM:03.
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Speech and Data Services 24.3 Functions 24.3.
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Speech and Data Services Idle pattern is transmitted. When both 8 kbps subchannels of a common TS resource go into idle state they are transformed into one 16 kbps idle resource. Idle pattern is generated as specified in /GSM:08.54/. TLS on active subchannel is set On: • TCH in ACTIVE state including all sub-states and the channel mode is not "signalling". ry Terrestrial link used for traffic. Terrestrial link supervision is active.
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Speech and Data Services In order to activate coding/decoding of speech in the RTC, the RBS issues TRAU frames of type Speech/Enhanced speech. In order to deactivate speech coding/decoding in the RTC, the RBS issues TRAU frames of type Idle Speech. During the exchange of TRAU frames between RBS and RTC carrying Full Rate Speech (or Full Rate Idle Speech), the RBS regularly calculates an appropriate time alignment value for controlling the downlink frame timing.
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Speech and Data Services In order to deactivate speech coding/decoding in the RTC, the RBS issues TRAU frames of type Idle Pattern according to /GSM:08.61/. During the exchange of TRAU frames between RBS and RTC carrying half rate speech, the RBS regularly calculates an appropriate time alignment value for controlling the downlink frame timing. This value is included in the transmitted TRAU frames.
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Speech and Data Services The TRAU frames exchanged between RBS and RTC during an active call can be of the following types: • Data • Data, containing Idle Data The arrival of data blocks from the air interface is supervised by the RBS. If no data block is received, it is replaced by an idle data block. Operational Conditions 24.4.1 Full Rate Speech na 24.
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Speech and Data Services 24.4.3 Half Rate Speech The round-trip delay for a half rate speech channel, introduced by the BTS, is less than 63 ms. The values are including additional delay due to the measuring method as described in /GSM 11.20:7.2.6, table 7–2b/. 24.4.4 Half Rate Data 4.8 kbits/s • 2.4 kbits/s • 1.2 kbits/s • 1200/75 bits/s • 600 bits/s na • ry Transparent data services supported: Non-transparent data services supported: • 4.
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Packet Data Services 25 Packet Data Services This chapter covers packet data services, including handling of the link, GSL, between RBS and PCU, as well as Terrestrial Link Supervision (TLS) and Link Quality Supervision. 25.1 References /GSM:05.02/CCITT G.821/ CCITT Blue book, rec G.821 Vol III Fascicle III.5 "Digital Networks, digital sections and digital line systems" Functions 25.2.1 Terrestrial Link Supervision for GSL ry 25.
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Packet Data Services The RBS initiates the setup and synchronization of the GSL, by issuing PCU frames of type "synchronization". Upon reception of PCU frames of type "synchronization" by RBS, the GSL is established. Upon reception of an RF CHANNEL RELEASE from the BSC, Idle pattern is started to be transmitted to the PCU. The GSL is stopped and the RBS-PCU connection is released.
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Call Control 26 Call Control The Call Control function defines the RBS functions related to call establishment and call control on the air interface. 26.1 References /GSM 04.04/ /GSM 04.06/ /GSM 04.08/ ry /GSM 05.02/ /GSM 05.05/ /GSM 05.10/ /GSM 08.58/ 26.2 na Whenever a reference is made to a function described in another chapter, please refer to the table of contents to find the appropriate chapter.
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Call Control Note: All logical channels (except PTCCH) are transparent for the BTS. Supported channel numbers /GSM 08.58:9.3.1/ Bm + ACCHs (Associated Control Channels) • Lm + ACCHs • SDCCH/8 + ACCH • SDCCH/4 + ACCH (TN=0) • PDCH ry • Supported activation types /GSM 08.58:9.3.3/ Immediate Assign • Normal Assign • Asynchronous Handover • Multislot configuration • Packet Channel • Initial activation na • eli mi Supported channel modes /GSM 08.58:9.3.
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Call Control Full rate data 600 bit/s transparent TCH/F2.4 Full rate data 1200/75 bit/s (1200 network >MS, 75 MS >network) transparent TCH/F Signalling, Bi-directional (not allowed on channel combination ix) TCH/FS Full rate speech, GSM speech alg. Ver 1, Bi-directional TCH/FS Full rate speech, GSM speech alg. Ver 2, Bi-directional TCH/F14.4 Full rate data 14.4 kbit/s non-transparent, Bi-directional TCH/H4.8 Full rate data 9.6 kbit/s non-transparent, Bi-directional Half rate data 4.
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Call Control Half rate data 4.8 kbit/s non-transparent, Uni-directional TCH/F9.6 Full rate data 9.6 kbit/s transparent, Uni-directional TCH/F4.8 Full rate data 4.8 kbit/s transparent, Uni-directional TCH/F2.4 Full rate data 2.4 kbit/s transparent, Uni-directional TCH/F2.4 Full rate data 1.2 kbit/s transparent, Uni-directional TCH/F2.4 Full rate data 600 bit/s transparent, Uni-directional TCH/F2.4 Full rate data 1200/75 bit/s transparent, Uni-directional na ry TCH/H4.8 TCH/H4.
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Call Control Timing Advance Required Normal Assignment /GSM 08.58:4.1/ The optional elements for Normal Assignment are: Encryption Information Optional Handover Reference Rejected Timing Advance Required SACCH Information Optional ry If the parameter SACCH Information is present, the contents will be used for this channel group instead of the information received in the SACCH FILLING INFORMATION MODIFY procedure described in Broadcast. na Asynchronous Handover /GSM 08.58:4.
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Call Control • Set Dedicated Resource Channel state = Activate. Description In order to activate a channel between MS and RBS, the RBS receives an idle traffic channel from BSC in a Channel_Activation message. This message contains the reason for the activation (immediate assignment, normal assignment, asynchronous handover, multislot configuration), the identification of the channel to be used (channel no.
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Call Control later and later. The answer from the MS also arrives later and later at the RBS. This function prevents the delay becoming so long as to cause TS3 to overlap onto TS4, thus disturbing another call. The function is terminated when the dedicated Resource Channels enter state IDLE. There are three different kinds of Adaptive Frame Alignment: 1. Access Delay Measurement 2.
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Call Control Physical_Information message to MS and the Handover_Detection message to BSC. /GSM 08.58:4.3/ MS RBS HANDO ACCESS BSC HANDO DET Figure 122 ry PHY INFO P003012A Physical information message na There are some criterias that have to be fulfilled if the Handover Access messages shall be accepted.
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Call Control Example: 3. MS 1. 2. ry 3. OLD BSC P003013A Transmission of physical information na Figure 123 NEW 1. BSC sends a message to the MS through the old RBS containing information about the frequency and time slot to change to. This information is sent over FACCH. eli mi 2. The MS tunes to the new frequency, and transmits handover access bursts in the correct time slot.
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Call Control RBS BSC RF CHAN REL RF CHAN REL ACK Figure 124 26.6 ry P003014A RF channel release Deactivate SACCH na Purpose To stop transmission on SACCH of the addressed channel group. Precondition and Initiation See Channel Activation above. eli mi The function is initiated when the RBS receives a Channel_Release message from BSC. Description The RBS immediately stops all transmission on SACCH of the addressed channel group. /GSM 08.58:4.6/ MS Pr Figure 125 26.
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Call Control Precondition and Initiation Channel combination supported is defined in section Channel Activation above /GSM 04.06:5.4.4/. The Link Establish Indication function is applicable for: • SAPI-0 on SDCCH and FACCH • SAPI-3 on SDCCH and FACCH/T There are two cases of establishment as described in /GSM 04.06:5.4.1/: Normal establishment • Contention resolution establishment ry • The function is initiated when the RBS receives an SABM from MS.
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Call Control • 26.8 The link establishment procedure is in accordance with / GSM 08.58.3.1/ and /GSM 04.06:5.4.1/ Link Release Indication Purpose To release a link layer connection between MS and the network. Precondition and Initiation ry Channel combination supported is defined in section Channel Activation above.
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Call Control 26.9 Link Establishment Request Purpose To establish a signal link between MS and network. Precondition and Initiation Channel combinations supported are defined in section Channel Activation above. This function is applicable for: SAPI-3 links on SDCCH, SACCH/T and SACCH/M ry • The function is initiated when the RBS receives an ESTablish REQuest from BSC.
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Call Control Precondition and Initiation Channel combinations supported are defined in section Channel Activation above. This function is applicable for: • SAPI-3 links on SDCCH, SACCH/T and SACCH/M The function is initiated when a RELease REQuest is sent from BSC to RBS. Description ry The following procedure is used by BSC to request the release of a link layer connection on the air interface in multiframe mode / GSM 04.06:5.4.4/.
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Call Control Precondition and Initiation Channel combinations supported are defined in section Channel Activation above. This function is applicable for: • SAPI-0 on SDCCH and FACCH • SAPI-3 links on SDCCH, SACCH/T and SACCH/M The function is initiated when the RBS receives a DATA REQUEST from BSC. ry Description na The following procedure is used by BSC to send a layer 3 message to MS in acknowledged mode /GSM 08.58:3.5/.
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Call Control Precondition and Initiation Channel combination supported is defined in section Channel Activation above. This function is applicable for: • SAPI-0 on SDCCH and FACCH • SAPI-3 links on SDCCH, SACCH/T and SACCH/M The function is initiated when the RBS receives an I-frame from MS. ry Description The following procedure is used when the MS sends a transparent layer 3 message to RBS. The message is forwarded to the BSC.
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Call Control This function is initiated when the RBS receives a SACCH INFO MODIFY from BSC. Description ry This procedure is used by the BSC to modify the SACCH filling information (System Information) sent on an individual SACCH channel. For this purpose, the RBS receives a SACCH INFO MODIFY message from BSC.
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Call Control SAPI-3 SAPI-3 is used for SMS point-to-point. The following channels are supported: SDCCH Acknowledged mode is supported. SACCH/T Acknowledged mode is supported. SACCH/M Unacknowledged mode is supported. Description ry LAPDm (Link Access Procedure on the Dm-channel) is a protocol that operates at the data link layer of the OSI structure. It receives service from the physical link (layer 1) and provides services to the net (layer 3).
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Call Control • SDCCH/8 + ACCH Supported reactivation types /GSM 08.58:9.3.3/ • Immediate Assign • Normal Assign • Asynchronous Handover Supported channel modes /GSM 08.58:9.3.6/ Signalling TCH/H Signalling TCH/FS Full rate speech, GSM speech alg. Ver 1 TCH/FS Full rate speech, GSM speech alg. Ver 2 SDCCH na TCH/HS ry TCH/F Half rate speech Signalling For the non-transparent service Full rate data 14.4 kbit/s non-transparent eli mi TCH/F14.4 TCH/F9.6 Full rate data 9.
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Call Control Full rate data 14.4 kbit/s non-transparent, Bi-directional TCH/F9.6 Full rate data 9.6 kbit/s non-transparent, Bi-directional TCH/H4.8 Half rate data 4.8 kbit/s non-transparent, Bi-directional TCH/F14.4 Full rate data 14.4 kbit/s transparent, Bi-directional TCH/F9.6 Full rate data 9.6 kbit/s transparent, Bi-directional TCH/F4.8 Full rate data 4.8 kbit/s transparent, Bi-directional TCH/F2.4 Full rate data 2.4 kbit/s transparent, Bi-directional na ry TCH/F14.4 TCH/F2.
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Call Control Full rate data 1.2 kbit/s transparent, Uni-directional TCH/F2.4 Full rate data 600 bit/s transparent, Uni-directional TCH/F2.4 Full rate data 1200/75 bit/s transparent, Uni-directional TCH/H4.8 Half rate data 4.8 kbit/s non-transparent TCH/H4.8 Half rate data 4.8 kbit/s transparent TCH/H2.4 Half rate data 2.4 kbit/s transparent TCH/H2.4 Half rate data 1.2 kbit/s transparent na ry TCH/F2.4 TCH/H2.4 Half rate data 600 bit/s transparent TCH/H2.4 TCH/F4.
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Call Control The reactivation for the multislot configuration procedure is in accordance with /GSM 08.58:4.1/. Encryption Information Optional Handover Reference Rejected Timing Advance Rejected SACCH Information Optional ry If the parameter SACCH Information is present, the contents will be used for this channel group instead of the information received in the SACCH FILLING INFORMATION MODIFY procedure described in Broadcast.
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Call Control Description By means of the POWER INFORMATION element, the transmission power of the RBS and the MS is immediately changed. It is an optional part of the DATA REQUEST message on Abis. /GSM 08.58:8.3.1/ The power information element contains the new power levels to be used by the RBS (BS Power Level) and the MS (MS Power Level) on the air interface. The RBS will immediately, without waiting for the next measurement period, change output power to BS Power Level.
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GPRS, Physical Link Layer 27 GPRS, Physical Link Layer General Packet Radio Services (GPRS) is a packet switched service. The service provides: 27.1 • Efficient use of scarce radio resources • Fast set-up/access time • Efficient transport of packets in the GSM network References ry /GSM:04.04/ /GSM:04.60/ /GSM:05.02/ /GSM:05.10/ /GSM:05.08/ na /GSM:05.
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GPRS, Physical Link Layer Description The RBS receives a PCU Frame on Abis interface and checks for errors. The RLC/MAC Block and the control information channel mode, coding scheme and power level is extracted from the PCU frame. A radio block is created by encoding the RLC/MAC Block according to the given coding scheme /GSM:05.03:5/. The information of channel mode is stored to be applied on the next block uplink / GSM:05.02:6.3.2.2.1/. 27.3.
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GPRS, Physical Link Layer Description • Burst quality • Frame quality • CRC • Access delay ry The RBS receives four access bursts and performs demodulation according to the previously stored channel mode. Channel decoding is performed according to /GSM:05.03:5.3.1/. The RBS performs the following PDCH measurements produced per access burst by the decoder: A PCU Frame is created, consisting of the four decoded access bursts and the PDCH measurements.
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Base Station Power Control 28 Base Station Power Control This document covers power regulation by means of the CHANNEL_ACTIVATION and BS_POWER_CONTROL messages from the BSC. The "Base Station Power Control" function is implemented to minimise the transmit power required by the RBS TRXs (transceivers), while maintaining the quality of the radio link. References GSM 05.02 (phase 2) version 4.3.0 /GSM:05.05/ GSM 05.05 (phase 2) version 4.6.0 /GSM:05.08/ GSM 05.08 (phase 2) version 4.6.0 /GSM:08.
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Base Station Power Control • (v) FCCH+SCH+BCCH+CCCH+SDCCH/4(0..3)+SACCH/ C4(0..3) • (vii) SDCCH/8(0..7) + SACCH/C8(0..7) • (viii) TCH/F + FACCH/F + SACCH/M • (ix) TCH/F + SACCH/M • (x) TCH/FD + SACCH/MD ry The nominal power level is used if BS Power is not received at channel activation. The "BS Power" received is stored in the RBS to be used for the requested dedicated channel.
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Channel Measurements 29 Channel Measurements The RBS supports: 29.1 • Active Channel Measurements, that is quality and signal strength measurements on active uplink dedicated channels. • Idle Channel Measurements, that is signal strength measurements on idle uplink dedicated channels. References ry /GSM:08.58/ /GSM:05.08/ /GSM:05.02/ 29.2 Concepts RX Reference Point Defined as the point where the RX antenna signal crosses the RBS border, that is the connector for the antenna feeder.
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Channel Measurements The RBS measures BER (Bit Error Rate) and the signal strength over each active channel per reporting period. All SACCH frames are included in the measurements. The reporting periods are different for different TNs, and for different channels, and are the same as for the MS, defined in /GSM 05.08:8.4/. The measurements of signal strength are referred to the RX reference point. An R.M.S. (Root Mean Square) value is created for each burst.
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Channel Measurements The measurements of signal strength are referred to the RX reference point. An R.M.S. value is formed for each timeslot. The logarithm of this value, expressed in dBm, is coded as defined for RXLEV in /GSM 05.08:8.1.4/. The average value is calculated from the RXLEV value, After Initiation, a first average value is calculated after two completed measurement periods. The second value is calculated when the first averaging period is completed.
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Discontinuous Transmission 30 Discontinuous Transmission "Discontinuous Transmission" is a mechanism which allows the radio transmitter to be switched off during speech or data (non-transparent) pauses. The following benefits are achieved: • Power is saved in the MS uplink • The overall interference level on the air is reduced • Reduced RBS power consumption downlink References /GSM:04.06/ /GSM:04.21/ /GSM:05.02/ /GSM:05.08/ GSM 04.21 (phase 2) version 4.2.1 GSM 05.02 (phase 2) version 4.3.
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Discontinuous Transmission /GSM:06.42/ Voice Activity Detection (half rate speech) /GSM:06.81/ Overall DTX Operation (enhanced full rate speech) The downlink DTX function is supported for channel modes: TCH speech, full rate (GSM speech alg. version 1), uni-directional • TCH speech, full rate (Speech full rate version 2), uni-directional • TCH speech, full rate (GSM speech alg.
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Discontinuous Transmission SID frames (including comfort noise parameters) are scheduled in TDMA frames according to /GSM:05:08:8.3/. When a SID frame is stolen for signalling (FACCH) purposes, the scheduling in TDMA frames will instead be according to /GSM:06.31:5.1.2/, / GSM:06.41:5.1.2/ or /GSM:06.81:5.1.2/.
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Discontinuous Transmission During periods of silence, RTH-SPEECH-IND with the silence indicator (SID) set to "3" are sent to the RTC in case when GSM speech alg. version 1 are used. If, during periods of silence, Speech full rate version 2 are used, RTH-SPEECH-IND frames are sent to the RTC with the BFI set. Half Rate Pr eli mi na ry During periods of silence, RTH-SPEECH-IND frames are sent to the RTC with the BFI set.
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Frequency Hopping 31 Frequency Hopping "Frequency hopping" means that the radio frequency channel of a BPC may change on a per TDMA frame basis. Frequency hopping improves the quality of the transmission on the air interface. The Frequency hopping function is used to increase the efficiency of the channel coding and interleaving in the following situations: Multipath (or Rayleigh) fading − • Is often frequency-dependent. In case of a dip, changing of frequencies reduces this problem.
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Frequency Hopping Supported channel numbers are: • Bm + ACCH • Lm + ACCH • SDCCH/8 + ACCH This function is initiated when a CHANNEL_ACTIVATION message / GSM:08.58:8.4.1/ is received from the BSC. The information element Channel Identification as defined in / GSM:08.58:9.3.5/ is ignored. ry The BPC must have already been configured for frequency hopping by the BSC (OML link). All frequency hopping parameters are defined for each BPC at configuration, and cannot be changed at channel activation.
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Encryption 32 Encryption Encryption is used for ciphering and deciphering of information to and from an MS over a dedicated resource. The RBS supports two encryption modes, either using no encryption or using a GSM encryption algorithm. The BSC controls which encryption mode is used. There are two product variants with different encryption algorithms implemented: No encryption — GSM encryption algorithm version 1 (A5/1). • No encryption — GSM encryption algorithm version 2 (A5/2). ry 32.
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Encryption This function is initiated during the set up of an encrypted channel between MS and RBS. The BSC controls initiation of encryption mode. Description ry To set up a dedicated logical channel, encryption mode has to be set. The RBS supports two encryption modes, "No encryption shall be used"and "encryption" (encrypted by a specific GSM encryption algorithm), see /GSM 08.58/.
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Encryption MS BTS BSC Encryption CMD Ciph Mode CMD RR (SDCCH) RR (SDCCH) Ciph Mode Com ry DI (Ciph Mode Com) Figure 133 Encryption Mode Change at Mode Modify Purpose na 32.4 P003010A This function is used to change the encryption mode (key and algorithm) on an active dedicated channel group. eli mi Preconditions and initiation Encryption is either activated or deactivated. The function is initiated when the RBS receives a MODE_MODIFY_COMMAD message from BSC.
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Mode Modify 33 Mode Modify The "Mode Modify" procedure is used by BSC to request a change of the channel mode (speech to data, data to speech, and so forth) of an active channel. 33.1 References /GSM 05.02/ GSM 05.02 (phase2) version 4.3.0 /GSM 08.58/ GSM 08.58 (phase2) version 4.2.0 33.2 ry Whenever a reference is made to a function described in another chapter, please refer to the table of contents to find the appropriate chapter. Function na By means of the MODE MODIFY procedure /GSM: 08.
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Mode Modify TCH/F2.4 Full rate data 600 bit/s transparent Any transition between the following full rate, multislot, Channel Modes is supported: Signalling, Bi-directional (not allowed on channel combination ix) TCH/FS Full rate speech, GSM speech alg. ver 1 Bi-directional TCH/FS Full rate speech, GSM speech alg. ver 2 Bi-directional TCH/F14.4 NT Full rate data 14.4 kbit/s non-transparent, Bi-directional TCH/F9.6 NT Full rate data 9.
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Mode Modify TCH/F2.4 Full rate data 2.4 kbit/s transparent, Uni-directional TCH/F2.4 Full rate data 1.2 kbit/s transparent, Uni-directional TCH/F2.4 Full rate data 1200/75 bit/s transparent, Uni-directional TCH/F2.4 Full rate data 600 bit/s transparent, Uni-directional ry Any transition between the following half rate Channel Modes/ GSM:08.58:4.2/ is supported: Signalling TCH/HS Half rate speech TCH/H4.8 Half rate data 4.8 kbit/s non-transparent TCH/H4.8 TCH/H2.4 Half rate data 4.
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Mode Modify 33.3 Operational Conditions Pr eli mi na ry The maximum delay from reception of a MODE_MODIFY command until the command is acknowledged (MODE_MODIFY_ACKNOWLEDGEMENT or MODE_MODIFY_NEGATIVE_ACKNOWLEDGEMENT) is 25 ms.
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Mobile Station Power Control 34 Mobile Station Power Control By means of the "MS Power Control" procedure /GSM:08.58:- 4.8/, BSC gives RBS the power level to be used by MS, on a dedicated resource. MS power control is employed to minimise the transmit power required by the MS while maintaining the quality of the radio links. By minimising the transmit power levels, interference to co-channel users is reduced.
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Mobile Station Power Control • Order MS to set the commanded power level Description The function is initiated when a CHANNEL_ACTIVATION message / GSM:08.58:8.4.1/ containing MS Power is received from the BSC. The value of the ordered MS power /GSM:08.58:9.3.13/ is passed transparently to the MS. 34.2.2 ry RBS stores the MS power level received from BSC and includes it in the L1 header of all downlink SACCH blocks /GSM:04.04:7.1/.
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Short Message Service 35 Short Message Service SMS P-P (Short Message Service Point-to-Point) provides a means of sending messages of limited size to and from a mobile. SMSCB (Short Message Service Cell Broadcast) is a service in which short messages may be broadcast to all mobiles in a cell.
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Short Message Service • (ii) TCH/H(0.1) + FACCH/H(0.1) + SACCH/TH(0.1) • (v) FCCH+SCH+BCCH+CCCH+SDCCH/4(0..3)+SACCH/ C4(0..3) • (vii) SDCCH/8(0..7) + SACCH/C8(0..7) • (viii) TCH/F + FACCH/F + SACCH/M The SMS P-P MT function is initiated when an ESTABLISH REQUEST message for a SAPI-3 link is received from the BSC. ry SMS P-P MT messages are transmitted as transparent L3 (Layer 3) messages (in acknowledged mode), on a SAPI-3 link between the network and the MSs. 35.2.
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Short Message Service RBS Actions: • Interpretation of SMS_BROADCAST_REQUEST messages • Transmission of SMSCB messages • Transmission of CBCH Fill-frame Description Configuration parameter CBCH Ind must be set to 1, to indicate the usage of SDCCH sub-channel 2, for SMSCB messages. ry Transmission of SMSCB messages on channel combination (vii) requires that configuration parameter BS_AG_BLKS_RES is set to a value greater than zero, /GSM:05.02:6.5.4/ /GSM:05.02:3.3.2.3/.
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Diversity Supervision 36 Diversity Supervision The "Diversity Supervision" function supervises the signal strength imbalance between the two diversity channels in an RBS with receiver diversity. The function is capable of detecting major faults in the radio receiver paths or the receiver antenna system. 36.1 References GSM Requirements 05.08 Phase 2 version 4.6.0 ry /GSM:05.
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Diversity Supervision The SSI (Signal Strength Imbalance) is defined here as the mean difference (in decibels) between the receiver’s two diversity channels. The SSI is calculated per observation period Disturbance Threshold The Disturbance Threshold defines the limit for the signal strength imbalance, at which it is classified as abnormal and is regarded as a disturbance Function ry 36.
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Diversity Supervision 36.4 Operational Conditions The diversity supervision is characterised by a number of parameters which are implemented as software constants.
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Synchronization 37 Synchronization The purpose of this function is to synchronize an RBS internally. The function is needed to achieve air timeslot synchronization, according to /GSM:05.10/ and /JTC PCS:7/. The transition between different states and functions can be seen in the figure below. Startup Free running clock ry Establishing sync. state na Selection of ref. source Locking to ref.source Hold over time expired eli mi Hold over state Hold over operation Supervision of ref.
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Synchronization In this mode the RBS uses an incoming PCM-reference or the optional reference as synchronization reference. The RBS is not synchronized with any other RBS. • Master In this mode the RBS uses an incoming PCM-reference or the optional reference as synchronization reference. The generated timing is also distributed to other RBSes in the RBS cluster via the ESB. • Slave ry In this mode the RBS uses another RBS as synchronization reference.
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Synchronization Synchronizing The process of maintaining a phase lock to the reference Internal Source An internal short-term stable oscillator Optional Reference An optional frequency reference source built into the RBS PCM-reference A frequency reference extracted from the PCM-network ry External Synchronization Bus (ESB) A bus for distribution of synchronization information between RBSes in an RBS cluster 37.
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Synchronization Cold start Transmission network or other RBS as source 5 minutes Optional frequency source 10 minutes For both network and optional RBS is synchronized Transmission network, Optional and Start command frequency source or other RBS as after Function source Change is received 30 seconds Warm start 90 s when there is not jitter in the synch. source ry 10 seconds Transmission network, Optional frequency source or other RBS as source na 37.
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Synchronization Table 154 Selected Synch. Source Type TF Mode TF Synch. Source Type Optional Synch. HW No Optional Synch. HW Not defined Not defined Optional PCM Master/ Stand-alone Not defined Optional PCM PCM PCM PCM Internal Optional PCM Does not care Other RBS Other RBS Slave 1) ry TF Config. Parameters 1) Rejected by the Capability Conformance Check function.
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Synchronization the lack of reference source. This fault actually implies for an ITU-T G.703 2048 kbit/s system that the reference on both PCM-A and PCMB is not usable. If the RBS has not regained its synchronization either by re-establishment or reselection within 60 minutes (when TF mode is master and stand-alone) and within 15 minutes (when TF mode is slave), it is reported to the BSC which orders the RBS to disable all radio transmission.
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Synchronization The outcome of this continuous supervision of the reference is either that the reference is usable or not. The function terminates when "Hold-over expired time" ends in "Hold-over state". 37.7 Locking to the Reference Source Purpose Precondition and Initiation ry The function supervises the locking process and limits the time for locking to the reference source. The function is initiated when a locking attempt to a reference source is made.
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Synchronization 37.8 FN-Offset Purpose The purpose is to improve handover performance. If one RBS is configured for several cells and handover is done between two cells controlled by the same RBS, the handover execution time will be longer if the two cells are synchronized together. Precondition and Initiation ry The function is initiated by a request from the BSC.
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Synchronization Description The timing difference between different carriers within a cell shall be less than 1/4 bit in the air (920 ns). To fulfil this requirement the following delays must be compensated for: • the distribution delay on the external synchronization bus • the transmitter chain delay (delays in transmitter, combiner, feeder and antenna) ry The BSC/OSS operator defines one RBS in the RBS cluster to master and the others to slave(s).
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Radio Reception 38 Radio Reception Radio reception defines the function to receive an RF signal from the air interface and restore the bit stream. Diversity is used to improve the sensitivity on the receiver. It is achieved by having two antennas, and by that means take advantage of two or more receiver paths. 38.1 References For GSM 900 and GSM 1800: GSM Requirements 05.04 Phase 2 /GSM 05.05/ GSM Requirements 05.05 Phase 2 ry /GSM 05.
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Radio Reception Precondition and initiation The Air Time Slot Resources (ATSR) must be configured for diversity. The diversity initiates when the ATSR is taken into traffic. Description Antenna B ry Antenna A RXB na RXA Receiver eli mi 03_0466A Figure 136 Diversity Pr One way to improve your performance on received signal is by using diversity. This can be achieved by using two reception channels that are independently influenced by fading.
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Radio Transmission 39 Radio Transmission Radio transmission denotes the function to "Generate a Radio Frequency (RF) signal". 39.1 References GSM 900 and GSM 1800 GSM Requirements 05.02 Phase 2 version 4.6.0 /GSM:05.04/ GSM Requirements 05.04 Phase 2 version 3.1.2 /GSM:05.05/ GSM Requirements 05.05 Phase 2 version 4.13.0 /GSM:05.10/ GSM Requirements 05.08 Phase 2 version 4.6.0 GSM Requirements 05.10 Phase 2 version 4.2.0 eli mi GSM 1900 na /GSM:05.08/ ry /GSM:05.02/ /GSM:05.
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Radio Transmission 39.2 Concepts Base Transceiver Station (BTS), defined in the chapter "Radio Configuration, RBS 2000 Macro". Radio Base Station (RBS), defined in the chapter the "Radio Configuration, RBS 2000 Macro". Combining system and filtering is the interface between transmitters and the antenna system.
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Radio Transmission RBS TX Combining system + filtering TX . . Antenna mounted equipment Feeder X ry TX X = TX reference point 39.3 TX reference point X with antenna mounted equipment Functions Radio transmission na Figure 138 02_0467A eli mi Radio transmission denotes the function to "Generate an RF signal" from the bit stream that constitutes a burst. The transmitter uses the modulation format specified in /GSM:05.04/ for GSM 900 and GSM 1800 and /JTC:4/ for GSM 1900.
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Radio Transmission SW Power Boost In order to improve downlink performance, a BTS, without Filter Combiner,can be configured for TX diversity. Note: Only the following macro configurations are supported: RBS 2101, RBS 2102 and RBS 2202 with configurations 1x2, 2x2, 3x2, CDU-A for 900 MHz, CDU-A with TMA for 1800 MHz and 1900 MHz. ry Two transmitters connected to different antennas are then transmitting with maximum power on the same frequency.
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Radio Transmission Dynamic power reduction The transmitter can control the output power as defined by the base station power control function. Frequency hopping Pr eli mi na ry The transmitter is capable of frequency hopping as defined by the frequency hopping function.
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Frequency Allocation Support 40 Frequency Allocation Support The FAS function measures the interference level on a number of frequencies, specified by the operator. The measurements are performed on idle channels or idle burst positions. The TRXC:s execute the FAS function independently of each other (however all TRXC:s don’t have to be used). Thus it is here described only how the FAS function works on one TRXC.
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Frequency Allocation Support 40.3.3 Stop measurement FAS measurement will be stopped either by directed O&M message, or by receiving a new configuration. 40.3.4 FAS measurement The FAS measurements are performed according to the following: A FAS measurement is done every 15:th second. During that FAS measurement interval the signal strength of each frequency in the frequency list is measured once. 5.
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Frequency Allocation Support measurements equals zero, the median and percentile signal strength values are reported as zero. 40.4 Operational Conditions Pr eli mi na ry At least one timeslot on TCH must be enabled. Measurements can only be performed on enabled timeslots configured as TCH/F or TCH/H. The RX must also be enabled.
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Restart and Recovery 41 Restart and Recovery The "Restart and Recovery" function allows the RBS or a specific Replaceable Unit, RU, (see Section Concepts below) to be started or restarted in a controlled manner. Restart occurs with installation, repair or reset. The restart and recovery function is used with: power on • spontaneous reset (watchdog, software fault, memory fault) • reset button • BSC ordered reset ry • 41.
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Restart and Recovery CMRU Central Main Replaceable Unit An RBS has one CMRU. DMRU Distributed Main Replaceable Unit 41.3 Function 41.3.1 Purpose ry A Main RU is distributed if it is subordinated to the CMRU. The entire RBS is brought into operation in a controlled manner. The sequence of events is given below. 41.3.
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Restart and Recovery 24 bring DMRU into remote operation Start processor: If the checksum for the updated application software is correct, the updated application is chosen as application software. • If the RU is a DMRU without non-volatile memory, the DMRU must retrieve software from the CMRU. • If database parameters are not useable, are inaccessible or out of range, default values are used instead.
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Function Change 42 Function Change The purpose of "Function Change" is to facilitate the reload, change or upgrade of the RBS software and the subsequent activation of that software. The software is downloaded from the BSC to the RBS via the A-bis interface. Function change incorporates the following features: Rapid initial start • Rapid restart − • eli mi Software is distributed internally within the RBS.
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Function Change Distributed Main Replaceble Unit. A Main RU is said to be distributed if it is subordinated to the CMRU. Main RU Contains one or more processors, to which software can be downloaded from the BSC. A Main RU is either central or distributed, see above. A Main RU may or may not have a direct signalling link to the BSC. RU Replaceble Unit. An RU is the smallest unit that can be handled on site or in a repair center and of which information can be retrieved via OMT or BSC.
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Function Change function change if the normal application software is valid, thus there is always one application software available. If the normal application is corrupt (or unavailable), the base application software is automatically selected instead. 42.2.2 Software File Relation ry Each Main RU visible via the A-bis interface is offered every software file within the appropriate file package.
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Function Change At switch-over to the new software, traffic is affected. This implies a restart as in chapter Restart and Recovery followed by configuration and enabling as specified in chapter Functionality Administration. At start-up (in START_CF_CMD), negotiation will take place between BTS and BSC. The BTS sends a NEGOTIATION REQUEST message to the BSC including a list of valid IWDs supported by the BTS.
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Functionality Administration 43 Functionality Administration "Functionality Administration" provides the functionality necessary to allow the BSC to configure, enable and disable AOs within the RBS. This function also includes general layer 3 A-bis OML support for other functions within the RBS. 43.1 References 43.2 Concepts Replaceble Unit. An RU is the smallest unit that can be handled on site or in a repair center and of which information can be retrieved via OMT or BSC.
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Functionality Administration DP Digital Path IS Interface Switch TF Timing Functions TS Time Slot handler ry AO Application Object MO Managed Object na CON LAPD Sign. Conc. TX Radio frequency Transmitter RX Radio frequency Receiver TRXC Transceiver Controller eli mi SO Service Object Figure 140 CF Central Functions 01_0286B Managed Object classification 43.3 Functions 43.3.1 Application Object Connection 43.3.
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Functionality Administration • Configuration • Enable • Disable Configuration The process of setting the desired configuration parameters for an AO. ry For most AOs and most configuration parameters this process must be performed while the AO is disabled. However there are a number of exceptions, certain parameters on certain AOs may be configured by the BSC while the AO is enabled.
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Functionality Administration The BSC is informed of the successful disable of the AO or, if unsuccessful, an indication of why the disable was unsuccessful is returned. 43.3.3 A-bis OML Support Layer 3 downlink Elementary Procedures Downlink EPs are those EPs initiated by the BSC.
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Functionality Administration After a timeout the message is retransmitted. A maximum of 2 retransmissions are performed. After 3 timeouts (including 2 retransmissions) Layer 3 supervision is terminated. 43.4 Operational Conditions 43.4.1 Operation and Maintenance Pr eli mi na ry The visual indicators relevant to Functionality Administration are described within the context of Operation and Maintenance Support.
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Operation and Maintenance Support 44 Operation and Maintenance Support Operation and Maintenance Support defines RBS functions related to: • Visual indicators • Change from Local to Remote Mode and vice versa • Loop Control • RF Loop Test Supervision • Calender Time • RSSI Temperature Compensation • Max Cooling References ry Buttons na 44.1 • Whenever a reference is made to a function described in another chapter, please refer to the table of contents to find the appropriate chapter.
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Operation and Maintenance Support configured and enabled to fulfil its purpose. When a RU reads necessary information from its database and a signal is sent when it is ready. Main RU Contains one or more processors, to which SW can be downloaded from the BSC. A main RU is either central or distributed. A main RU may or may not have a direct signalling link to the BSC. Master Cabinet In a multiple cabinet configuration, the Master Cabinet is the cabinet with the SO CF.
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Operation and Maintenance Support sub-RU does not normally have a processor. It should be observed that a RU with a processor that is not loadable is classified as a sub-RU. TDMRU 44.3 Transceiver DMRU. A TDMRU is a DMRU that handles transceiver functionality. Buttons ry Purpose To be able to reset, to start test operation function and to change between local and remote mode. na Preconditions For the CPU Reset-button and the Test-button there are no precondition requirements.
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Operation and Maintenance Support Description The Local Mode Indicator starts flashing to indicate that a change of RU mode is in progress. The Operational indicator is turned off if applicable, see Section 44.15 Operational Indicator on page 354 and the Local/Remote button is disabled. The subfunction Local Mode in Progress is performed, seeSection 44.24 Local Mode in Progress on page 361. After this the Local Mode indicator is turned on, the Operational Indicator is handled see Section 44.
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Operation and Maintenance Support The RU mode is changed to Remote immediately after the link towards the BSC is established. The external condition class 1, called switch information, is ceased. The ceased external condition is not reported to the BSC. When the RU has entered Remote Mode the function terminates and the Local Mode indicator is turned off. 44.6 Change RU to Remote Mode Cancel ry Purpose To cancel a change to Remote Mode when a change of RU mode from Local to Remote is in progress.
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Operation and Maintenance Support Local/Remote button is disabled. When RU mode is changed to local for the slave RU, a TX diversity fault is raised on the master AO TX. A FAULT_REPORT message is sent to BSC on Abis interface. RU mode is changed to local and Abis communication with BSC via the master RU is stopped. When Local Mode has been entered, the slave MO TX is disabled if it was enabled, and the TX NOT ENABLED indicator is turned on.
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Operation and Maintenance Support The supervision parameters are defined by the IDB or the OMT. The supervision parameters define supervision status (active/inactive) and test interval. Each parameter has a default value. When the test loop is activated the test is continuously repeated with the defined test interval. The supervision is terminated at deactivation from the Operation and Maintenance Terminal. Detected faults at RF Loop Test are handled by the Diagnostics and Fault handling functionality.
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Operation and Maintenance Support will be measured continuously. The temperature level is then used for update of the RSSI temperature compensation value. The RSSI compensation value will not be updated more frequently than every 10th second. 44.12 Max Cooling Purpose Preconditions and Initiation ry To control the fans to make them perform their maximum available cooling when certain supervised values have reached certain levels. na Applicable for any operational state.
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Operation and Maintenance Support • At a Max Cooling state change. • After an EDMRU (ECU) reset. The Max Cooling state will not be updated more frequently than every 30th second. If Max Cooling fails the fault is logged but no further action taken within the scope of this function. Fault Indicator Purpose ry 44.13 To indicate if there are any faults in the RU the indicator is located on. Preconditions and Initiation na Applicable for any operational condition.
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Operation and Maintenance Support 44.14 BS Fault Indicator Purpose To indicate if there are any faults in the RBS. Preconditions and Initiation Applicable for any operational condition. The function is initiated when the SW is started. ry Description The BS Fault indicator is controlled from the Diagnostics and Fault Handling functionality and from the Restart and Recovery functionality. When the RU is reset in any way the handling of the indicator is terminated.
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Operation and Maintenance Support Description The Operational indicator is controlled from the Diagnostics and Fault handling functionality, Restart and Recovery functionality and Function Change Functionality. The indicator is turned off 2-10 seconds after the SW has started. When the RU is reset in any way the handling of the indicator is terminated.
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Operation and Maintenance Support Table 155 Operational States RU in Local Mode The state of the operational indicator on CMRU and TDMRU is determined upon the operational mode of the MOs associated to the RU. The operational indicator on the EDMRU is only controlled locally and is described by the Diagnostics and Fault Handling Functionality.
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Operation and Maintenance Support Preconditions and Initiation Applicable for any operational condition. The function is initiated when the SW is started. Description Yellow Position: TDMRU (TRU) ON: na Colour: States of the indicator TX is not enabled OFF TX is enabled Local Mode Indicator eli mi 44.17 ry The TX Not Enabled indicator is controlled from Functionality Administration functionality and from Restart and Recovery functionality.
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Operation and Maintenance Support − For a TDMRU that is configured to implement a slave TX in a SW Power Boost configuration: The RU is remote via the TDMRU that implements the master TX. For description of changing an RU to Local Mode, see Section 44.4 Change RU to Local Mode on page 347. Limitations: 44.18 External Alarms Indicator Purpose ry The Local Mode indicator will not indicate when the layer 2 A-bis communication with the BSC is lost when the RU Mode is Remote.
PAGE 361
Operation and Maintenance Support Preconditions and Initiation Applicable for any operational condition. The function is initiated by the HW when the RU is started. Description ry The DC Disconnect indicator indicates if the DC is working properly or not. If the environmental requirements are not fulfilled, the power to the rest of the RBS is switched off. The DC Disconnect indicator is controlled from the Climate protection functionality and from Restart and Recovery functionality.
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Operation and Maintenance Support 44.21 Bat Disconnected Indicator Purpose To indicate if the battery is disconnected. Preconditions and Initiation Applicable for any operational condition. The function is initiated by the HW when the RU is started. ry Description The Bat Disconnected indicator indicates if the battery is connected or not. The Bat Disconnect indicator is controlled from Power Supply functionality and from Restart and Recovery functionality.
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Operation and Maintenance Support 44.24 Local Mode in Progress Local Mode in Progress is a subfunction. Purpose To change RU mode from Remote to Local. Preconditions and Initiation Description ry The RU mode should be "Change to Local Mode in progress". The subfunction will be initiated when a change of RU mode to Local mode has been initiated. An external condition class 1, called switch information, is raised on the RU.
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Installation Data Handling 45 Installation Data Handling Information about specific areas regarding either the RBS as a whole or each of the Replaceable Units, RUs, is stored in a database in the RBS.
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Installation Data Handling 45.4.1 Elements Found in the RBS Database RBS External Alarms Specifies the alarm identity, alarm data, alarm severity and alarm criterion for each external alarm. Access: BSC via the Abis interface (in fault reports and hardware information) RBS ARAE Supervision ry Operator via the OMT Specifies the affected functionality, fault class and antenna instance number of each auxiliary fault.
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Installation Data Handling RU Physical Position Identifies the location of the RU at a site, including information about cabinet, rack, shelf and slot. Access: BSC via the Abis interface (in fault reports and hardware information) Operator via the OMT Elements Found in the RU Database ry 45.4.3 RU Specific Includes the parameters specific to an RU. These parameters are dependent on the hardware design. Functions na 45.
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Self Test and Supervision 46 Self Test and Supervision Self Test comprises an initial boot test and X-bus receiver test. The initial boot test is performed during the start-up of an RU, in order to test the functionality of the hardware required for the execution of the application software. The X-bus receiver test is performed at TX configuration if TX is configured for SW Power Boost, in order to test the X-bus receiver on the master TX and slave TX. 46.
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Self Test and Supervision The Boot Test returns a state that indicates failure or success. However, the test will terminate permanently if a Read/Write-memory failure is detected. This causes a reset of the processor. The function can be upgraded remotely by replacing parts of the boot software. 46.3.2 X-Bus Receiver Test Purpose Preconditions and Initiation ry To detect any faults on the X-Bus before the SW Power Boost is started.
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Self Test and Supervision 46.4.1 Supervision of Buses Purpose The purpose of this function is to check the integrity of the data on the buses. Preconditions and Initiation ry The function is automatically initiated at the start of the functions driving and receiving information on the buses. Description Supervision of Cables eli mi 46.4.2 na Receive and transmit bus supervision encompasses buses between three or more RUs or major functional blocks.
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Self Test and Supervision 46.4.3 Supervision of Application Program Purpose Supervises the application software. If the execution of the software fails (for example a cyclic loop) the function exception processing interrupts the execution. Preconditions and Initiation ry Initiates automatically at start of application software. Description na The main processor supervises the operation of the sub-processors by the regular reception of signals from the sub-processors.
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Self Test and Supervision 46.4.5 Radio Transmission and Reception Purpose The transceiver is tested during traffic by a radio test loop function. The purpose is to detect a faulty transceiver by detecting an error in the signal strength or in the number of bit errors. Preconditions and Initiation ry The test requires two unused ATSR (AirTime Slot Resources) separated by three timeslots.
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Self Test and Supervision Preconditions and Initiation Initiates when the signalling multiplexing application is started in the CMRU and when the corresponding application handling the signalling endpoints on the DMRUs, are started. Description ry The relation between the reflected power and the output power can be described by the voltage standing wave ratio (VSWR). The more reflection the higher value of the VSWR.
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Self Test and Supervision Aborted frames are those frames ended by an abort flag sequence. Erroneous frames have the following conditions: • A CRC-error (Cyclic Redundancy Code, CRC-16). • Frames shorter than 4 bytes. • Frames longer than the maximum frame length (260 bytes). • Not ended on byte boundary. • Data loss caused by lack of buffers or memory access problems.
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Self Test and Supervision Preconditions and Initiation Initiates automatically at application software start. Description All BTS have inbuilt fans, which may run at four different speeds full, middle, low and stop. The main task of the fans is to circulate the air in the BTS and replace old, warm air with new, cooler air. The RBS 2102 and 2101 has a climate system with a control unit that controls the temperature and the humidity of the RBS.
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Self Test and Supervision 46.4.12 Synchronization Sources Purpose Supervise the ability of the transmitter and the receiver to lock to the reference frequency. Preconditions and Initiation ry Initiated when the application software is started. The faults associated are installed in the fault handling function at initiation. Description 46.4.13 na Frequency generators of the transmitter and receiver are supervised for adequate locking to the reference frequency.
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Self Test and Supervision Pr eli mi na ry minutes after the fault has been deactivated (that is to say the door has been closed) for the fault message to cease. The fault is reported as External Condition Fault. This function is valid for the outdoor cabinets only.
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Diagnostics and Fault Handling 47 Diagnostics and Fault Handling "Diagnostics and Fault Handling" supervises the handling of faults and disturbances detected by the "Selftest and Supervision" function.
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Diagnostics and Fault Handling Interface. The RBS equipment is seen as a set of MOs by the BSC. (This is a way of describing the RBS in a functionaloriented way. A logical model of the RBS in terms of MOs is built in the BSC). All O&M actions are based on this logical model structure created in the BSC. ry An MO does not necessarily have a oneto-one relation with a physical unit in the RBS and the MO comprises either both hardware and software or software only. Replaceable Unit.
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Diagnostics and Fault Handling 47.3.1 Fault Filtering Purpose The purpose of the subfunction is to determine whether a fault is present or absent, see figure below, and the nature of the fault. Disturbance/ Measurement Fault present/ fault absent eli mi na Fault filter parameters ry Fault filter Figure 141 P002833A Fault Filter Preconditions and initiation The selftest and supervision function has detected a disturbance.
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Diagnostics and Fault Handling 47.3.2 Fault Evaluation Purpose Detected faults are evaluated to determine the underlying fault. Preconditions and initiation A change in fault status for HWU or a RU. Description Fault Classification Purpose na 47.3.3 ry This function evaluates the input fault maps and tries to find out the actual fault cause.
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Diagnostics and Fault Handling Description When detecting a fault, the RBS automatically evaluates the fault situation and indicates the suspected faulty RU. The fault status of the RBS is updated with this information. When a fault is pin-pointed to a specific RU this is visually indicated as specified within the context of Operation and Maintenance Support. 47.5 Local Action ry Purpose When a fault is detected for a SE it may be necessary to minimize the effect of the fault.
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Diagnostics and Fault Handling Preconditions and initiation The fault detection function and the fault localization function reports new fault status for a MO. Both functions must have been completed before start of this function. Description The RBSs automatically informs the BSC of each change in the fault status. The old fault status is compared with the new fault status. If the fault status has changed for MO, a fault report procedure is initiated on A-bis.
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Operation and Maintenance Terminal 48 Operation and Maintenance Terminal The OMT is a tool that provides efficient aid for installation, site acceptance, diagnostics and maintenance of RBSs within the RBS 2000 series. 48.1 References /G.703/ /G.704/ ry /GSM:11.20/ /GSM:05.05/ 48.2 Concepts Each RBS has a built-in database where information about installed hardware is stored. The information reflects the configuration as well as the history of the hardware.
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Operation and Maintenance Terminal Distributed Main Replaceble Unit. A Main RU is said to be distributed if it is subordinated to the CMRU. Main RU Contains one or more processors, to which software can be downloaded from the BSC. A Main RU is either central or distributed, see above. A Main RU may or may not have a direct signalling link to the BSC. Passive RU A passive RU is an RU with a very low level of intelligence.
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Operation and Maintenance Terminal Configurations possible to display, comprise all RBS 2000 products and the configurations as specified for each product. The following RU and connections are graphically displayed: DXU − TRU − ECU − CDU − Local bus − CDU bus − Number of antenna systems (1 or 3) ry − Display RBS software revisions, display RU software revisions for all Main RUs, see Section 48.3.16 Replaceable Unit on page 391.
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Operation and Maintenance Terminal Copy the IDB from the RBS to the OMT. Install Install the IDB from the RBS to the OMT. Cable mounting list Display a cable mounting list based upon information from the IDB. Site specific data Site specific data , that is IDB information that is changeable from the OMT, is displayed, copied to any file medium to the IDB in the OMT. Save Copy the IDB from the OMT to any file medium, for example a floppy disk or a hard disk.
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Operation and Maintenance Terminal 48.3.6 ARAE Supervision Parameters The following user functions, related to the ARAE, are available in the OMT: • Auxiliary Faults are possible to define for each alarm inlet. • The alarm inlets can be used for both External Alarms and for ARAE Supervision. • The definition of the ARAE Supervision Parameters is displayed. • Monitor ARAE fault status. 48.3.
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Operation and Maintenance Terminal − Current Supervision Limit Low − Current Supervision Limit High It is possible to define values for the following parameters only in OMT state LOCAL: – RX Group Delay – Loss • − RX Frequency Low − RX Frequency High ry – RX Frequency Range Display ALNA/TMA parameters, displays any of the following parameters associated with ALNA/TMA: na – Current Supervision Limits − Current Supervision Limit Low − Current Supervision Limit High – RX Group Delay eli mi
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Operation and Maintenance Terminal This function makes it possible for the operator to define (or redefine) the IDB parameter RBS TF Compensation Value. • Display TF Compensation Value The IDB parameter RBS TF Compensation Value (in ns) is displayed. The following user functions, related to the /G. 703/ 2048 kbit/s PCM network, are available in the OMT: Display spare bits, display spare bits in timeslot 0 on G.703, values (0 or 1) for bits Sa4-Sa8.
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Operation and Maintenance Terminal Exception: A DXU which uses the PRACT transmission circuit does not support the LBO values. • Modify FDL use values for transmission interface. Sets the individual Facility Data Link (FDL) use values for a T1 transmission interface. The values are defined and referred as parameter "FDL_use" in the IDB. Exception: A DXU which uses the PRACT transmission circuit does not support the FDL_use. Display FDL use values for transmission interface.
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Operation and Maintenance Terminal • Switch on Measurement Reports, switch on Measurement Reports for one or several time slots. • Switch off Measurement Reports, switch off Measurement Reports for one or several time slots. The functions above are normally used during maintenance (switch on/off QIU, Monitor maintenance data) • installation (switch on/off Measurement Reports) Managed Object ry 48.3.
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Operation and Maintenance Terminal • − Currently executing software − Base application software stored in non-volatile memory − Normal application software in non-volatile memory Define RU, define the following parameter associated with the CMRU − TEI The functions above are normally used for Maintenance (display RU software revision, display RU HW info) • Installation (define RU) Faults ry 48.3.
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External Alarms 49 External Alarms 49.1 References Whenever a reference is made to a function described in another chapter, please refer to the table of contents to find the appropriate chapter. Concepts An alarm that originates from a source defined by the customer. The alarm is reported over A-bis transparently through the RBS. An example is a fire alarm. Auxiliary Faults Detected by supervision of auxiliary equipment.
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External Alarms Preconditions and initiation The external alarms function is started by the restart and recovery function. Description The following parameters are associated with each supervised external alarm: 1–16. Defines which inlet the external alarm source equipment is connected to. Inlet Usage "Auxiliary Fault", "External Alarm" or "Not Defined". The default alarm setup is that alarm inlets are "Not Defined". Alarm Identity The numeric identity of a specific external alarm within the RBS.
PAGE 397
External Alarms Capabilities The Capabilities of the different Radio Base Stations are shown in the table below: Table 157 Maximum Number of external alarms defined by the customer External Alarm, maximum RBS 2101 8 RBS 2102 16 RBS 2103 16 RBS 2202 16 RBS 2302 8 ry Radio Base Station (1) Pr eli mi na (1) In case of three cascaded RBS 2302, thew maximum number of External Alarms is 16.
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Handling of Auxiliary Equipment 50 Handling of Auxiliary Equipment A number of customer defined, antenna related auxiliary equipment can be supervised by the RBS. The raising of an auxiliary fault is, after analysis in the RBS, reported to the BSC. Depending on what severity the operator has defined for the fault, the concerned MO could be taken out of operation. 50.1 References Concepts Auxiliary Equipment Equipment connected to the RBS but normally situated outside the RBS cabinet.
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Climate Protection Fault class There are two possible severity classifications Antenna instance number Defines the physical antenna Each of these parameters is initially defined manually on RBS installation, using an OMT. Subsequently any of these parameters may be modified using an OMT. The RBS supervises each configuration auxiliary fault. An auxiliary fault is filtered, that is, must remain in a new state a fixed period of time (approximately 3 seconds) before the BSC is notified.
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Climate Protection 51 Climate Protection The "Climate Protection" function: • Supervises and maintains the internal temperature and humidity within allowed ranges for the units in the RBS • Controls the connection and disconnection of power, at start (or restart) of the RBS and at extreme internal temperature. ry The external temperature range for each RBS type is product-specific.
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Climate Protection Description This function maintains the internal temperature by an internally circulated air system (separated from the external environment). The internally circulated air will pass through an active cooling unit which has the capacity to lower the internal air temperature below the external environmental temperature. 51.2.
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Climate Protection 51.2.5 Climate Supervision The internal temperature and humidity of the air in the RBS are measured by sensors and kept within working ranges. The following parameters are measured: The internal temperature outside the normal range • The internal temperature outside the safe function range • The internal relative humidity raised above the upper limit for safe function, see note below. ry • Administration The internal temperature in the RBS cabinet is readable.
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Climate Protection − 51.2.8 The RBS power system is connected but the users are not. However, as soon as the internal temperature falls below the upper limit for safe function, the users are connected. Power Disconnection The users are disconnected from the DC power when the internal temperature falls below the lower limit for safe function. Pr eli mi na ry The users are reconnected to the DC power when the internal temperature has raised 5 C above the lower limit for safe function.
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EMC Capabilities 52 EMC Capabilities This specification covers the capabilities of the RBS 2000 in respect of EMC (ElectroMagnetic Compatibility). The capabilities include conducted and radiated emission as well as conducted and radiated immunity thresholds. The internal EMC capabilities of RBS 2000 and interference appearing on antenna ports are not covered by this chapter. References 1. 89/336/EEC EMC directive ry 52.
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EMC Capabilities Power frequency magnetic fiels immunity tests 13. EN 61000–4–11 Voltage Dips, short interruptions and voltage variations. Immunity tests 14. VDE 0878, 1986 Radio Interface Suppression of Telecommunication Systems and Apparatus 15. ITU-T Recommendation K.20, 1984 52.2 ry Resistibility of Telecommunication Switching Equipment to Overvoltages and Overcurrents.
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EMC Capabilities Transient phenomena applied to Transmitters. A communication link shall be established at the start of the test and maintained during and after injection of the transients Performance Criteria CR Continous phenomena applied to Receivers. A communication link shall be established at the start of the test and maintained during the test. For the system the RXQUAL (as defined in GSM 05.
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EMC Capabilities EMC directive The EMC capabilities of the RBS fulfills the mandatory requirements specified in the EMC directive, 89/336/EEC, which gives compliance for trade in EU member countries. Generic Standards The following generic standards are fulfilled by the system: EN 50 081–1, Jan 1992 Emission Conducted Emission Table 159 Voltage fluctuation on AC power supply leads Basic standard EN 61000-3-3 Limit Set by Table II in EN 61000-3-3 Table 160 na 52.3.
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EMC Capabilities Table 165 Limit standard VDE 0878, Magnetic emission, part 1 Limit Class B Conducted Immunity on AC Input Power Ports Table 166 Fast transient test EN 61000-4-4 Test level 4 kV common mode between all lines and cabinet ground reference Performance Criteria B Limit standard ETS 300 342-2 Test level 4 kV common mode between all lines and cabinet ground reference Performance Criteria A for a complete system ry Basic standard na 52.3.
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EMC Capabilities Immunity on DC Input/Output Power Ports Table 170 Fast transient test Basic standard EN 61000-4-4 Test level 2 kV common mode between all lines and cabinet ground reference Performance Criteria B for a complete system Limit standard ETS 300 342-2 Test level 2 kV common mode between all lines and cabinet ground reference Performance Criteria A for a complete system ry 52.3.
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EMC Capabilities Table 174 Surge test 1.
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EMC Capabilities Criteria CT for transmitter units Criteria CR for receiver units Table 179 Basic standard EN 61000-4-8 Test level 10 A/m, 50/60 Hz Performance Criteria A Electro-static Discharges Table 180 Immunity of enclosure port ry 52.3.8 Immunity of 50/60 Hz magnetic fields Basic standard EN 61000-4-2 Test level Air discharges: 15 kV na Contact discharges: 8 kV Performance Criteria B Limit standard ETS 300 342-2 Test level Air discharges: 8 kV eli mi Contact discharges: 4 kV.
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Transmission Interface Handling G.703 2048 kbit/s 53 Transmission Interface Handling G.703 2048 kbit/s This function specification covers RBS functions for layer 1 communications on A-bis. The function Layer 1 Termination terminates a 2048 kbit/s G.703 PCM line. The function Supervision of Transmission faults detects faults in the transmission interface. 53.1 References ry The function Supervision of Transmission Quality monitors the quality of the transmission. /GSM 08.
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Transmission Interface Handling G.
PAGE 415
Transmission Interface Handling G.703 2048 kbit/s RBS 1 Downstream BSC PCM-A Upstream Downstream Mobile Station Upstream PCM-B Upstream Downstream RBS 2 Figure 142 PCM-B na Upstream ry PCM-A 01_0306A Upstream and Downstream For further information, see ITU-T G.704 White Book. Functions 53.3.1 Layer 1 Termination 2048 kbit/s eli mi 53.3 The function is initiated during restart of DXU. Layer 1 termination of the transport network interface is handled according to /GSM:08.54:4.0.0/.
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Transmission Interface Handling G.703 2048 kbit/s • Alarm indication to the remote end (A-bit in time slot 0 equal to "1") • CRC-4 error indicator (E-bit in time slot 0 equal to "0") Both actions are according to ITU-T recommendations G.704 and G.732. • Transmission of spare bits (Sa4-Sa8). The spare bits form a fixed bit pattern (see section Operation and Maintenance below) Two PCM paths are supported: PCM-A and PCM-B. 53.3.
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Transmission Interface Handling G.703 2048 kbit/s performed when the AO DP is in state "Enable". When the AO DP is enabled, all fault supervision states are set to zero. Reports are sent to the BSC is sent to the BSC when the alarm status is changed or when the BSC requires it. Fault supervision of the PCM line is performed according to /ITU-T rec. G.732 section 4/ and /GSM:08.54:4.0.0/.
PAGE 418
Transmission Interface Handling G.703 2048 kbit/s The frame alignment word in time slot 0 even frames is used to determine the error rate. ERATE ceases –3 Detection of bit error ratio less than 10 . LOS commences Three or less 1’s are received in a time interval of 250 µs. ry LOS ceases More than three 1’s are received in a time interval of 250 µs. AIS commences AIS ceases na A continuous stream of 1’s during two frames. A limited number of 0’s –3 corresponding to BER = 10 is allowed.
PAGE 419
Transmission Interface Handling G.703 2048 kbit/s A new period of available state begins at the onset of Q consecutive seconds with no SES detected. These Q seconds are considered to be part of the available time. 53.3.4 Supervision of Transmission Quality The function is initiated when the AO DP is enabled from the BSC. The configuration of quality supervision can only be performed when the AO DP is in state “Disable”. The reporting to the BSC is performed when the AO DP is in state “Enable”.
PAGE 420
Transmission Interface Handling G.703 2048 kbit/s Every detected fault situation is registered and regarded as a disturbance, even if it does not last long enough to be recognised as a fault. The DF is supervised and reported as the number of disturbances during the BI. Both counters are handled separately. Slip Frequency supervision This supervision monitors the number of slips per time interval. A slip is defined as where one frame (256 bits) is either lost or duplicated.
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Transmission Interface Handling G.703 2048 kbit/s Severely Errored Seconds supervision An SES is a second with at least one of the events: CRC-4 is OFF: At least N4 frame bit errors • CRC-4 is ON: At least N1 CRC-4 errors • LOF alignment • LOS • AIS • A-bit equal to “1” from the remote end • N1 E-bit indication received from the remote end (only valid when CRC-4 is used) ry • na Two counters for severely errored seconds exist.
PAGE 422
Transmission Interface Handling G.703 2048 kbit/s The number of unavailable seconds for each direction is reported after each BI. 53.3.5 Administration Supervision of transmission faults and transmission quality can be performed in different ways. With the help of parameters, the supervision can be configured to meet a wide range of requirements. The configuration parameters can only be changed when the AO DP is in state “Disable”.
PAGE 423
Transmission Interface Handling G.703 2048 kbit/s − • Base interval for ES, SES, UAS, BFF and SF − • Valid values: 60 and 80 s Base interval for DF and SF − 53.3.6 The resolution is 1 ms, but the accuracy is ±25 ms Value range: 1-24 h Multidrop Layer 1 ry For an RBS configured for multidrop, the function is initiated during restart of CMRU.
PAGE 424
eli mi na ry Transmission Interface Handling G.
PAGE 425
Transmission Interface Handling DS1 1544 kbit/s 54 Transmission Interface Handling DS1 1544 kbit/s This function specification covers RBS functions for layer 1 communications on A-bis. The function Layer 1 Termination terminates a 1544 kbit/s DS1 PCM line. The function Supervision of Transmission faults detects faults in the transmission interface. 54.1 ry The function Supervision of Transmission Quality monitors the quality of the transmission.
PAGE 426
Transmission Interface Handling DS1 1544 kbit/s Table 183 Extended Superframe Format (ESF) F bits Bit use in each timeslot Frame number Bit number FPS DL CRC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 0 193 386 579 772 965 1158 1351 1544 1737 1930 2123 2316 2509 2702 2895 3088 3281 3474 3667 3860 4053 4246 4439 0 0 1 0 1 1 m m m m m m m m m m m m - C1 C2 C3 C4 C5 C6 - 1) 1) Traffic Sign.
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Transmission Interface Handling DS1 1544 kbit/s Downstream The path for information from the BSC to the MS, see Figure 143 on page 425. Upstream The path for information from the MS to the BSC, see Figure 143 on page 425. Linear Cascade Chain A cascade of RBS:s according to Figure 143 on page 425. RBS 1 BSC Upstream PCM-A Downstream Mobile Station Upstream ry Downstream na PCM-B Upstream Downstream RBS 2 PCM-A PCM-B eli mi Upstream Figure 143 01_0306A Upstream and Downstream 54.
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Transmission Interface Handling DS1 1544 kbit/s • Input jitter and wander tolerance according to AT&T Accunet T1.5 Service 1990 (TR 62411). This tolerance is valid for PCM-A and PCM-B respectively. The tolerance of relative phase differance (that is, phase differance between PCM-A and PCM-B) is 56 UIPTP • Fault supervision of each PCM path is performed according to − ANSI T1.403, section 9 (1995) − AT&T T1.
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Transmission Interface Handling DS1 1544 kbit/s 4. Neither PCM-A nor B can be used as reference source The free running oscillator is selected as reference source The free running oscillator is used to synchronize both PCM-A and B outgoing. The default setting of PCM-A and PCM-B is: PCM-A: “Available for synchronization” PCM-B: “Not available for synchronization”. 54.3.3 ry The parameters can be modified from OMT. The new setting is activated immediately.
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Transmission Interface Handling DS1 1544 kbit/s LOF commences A LOF condition is declared when any two of five consecutive received framing bits contain bit errors in the framing pattern or when LOS condition is declared. LOF ceases Recovery of frame alignment signal. ERATE commences ry An ERATE condition is declared when the bit error rate is equal to or –3 greater than 1*10 during time T. The number of CRC-6 errors is used in this evaluation.
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Transmission Interface Handling DS1 1544 kbit/s UAST ceases UAST ceases when available state is declared. Each direction (upstream and downstream) is supervised independently of the other. 54.3.4 Supervision of Transmission Quality The function is initiated when the AO DP is enabled from the BSC. The configuration of quality supervision can only be performed when the AO DP is in state “Disable”. The reporting to the BSC is performed when the AO DP is in state “Enable”.
PAGE 432
Transmission Interface Handling DS1 1544 kbit/s Two disturbance frequency counters exist. Both are derived from the downstream PCM port, but one is closely connected to downstream faults while the other one is related to upstream faults. The DF downstream counter is incremented by 1 for each occurrence of • LOF or • LOS or • AIS ry The DF upstream counter is incremented by 1 for each occurrence of RAI.
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Transmission Interface Handling DS1 1544 kbit/s • RAI ES are not counted during unavailable state. Both ES counters are reported after each BI. Severely Errored Seconds supervision An SES is a is a second with at least one of the events: N1 CRC-6 errors • LOF alignment • LOS • AIS • RAI ry • na Two counters for severely errored seconds exist. Both are derived from the downstream PCM port, but one is closely connected to downstream faults while the other one is related to upstream faults.
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Transmission Interface Handling DS1 1544 kbit/s 54.3.5 Administration Supervision of transmission faults and transmission quality can be performed in different ways. With the help of parameters, the supervision can be configured to meet a wide range of requirements. The configuration parameters can only be changed when the AO DP is in state “Disable”. The parameters of interest are given below.
PAGE 435
Transmission Interface Handling DS1 1544 kbit/s • Base interval for DF and SF − 54.3.6 Value range: 1-24 h Multidrop Layer 1 For an RBS configured for multidrop, the function is initiated during restart of CMRU. AIS Generation ry For an RBS not configured for multidrop, the function is initiated when the parameter Network Topology is set by the OMT to indicate multidrop (cascade). When entering one of the alarm states LOF, LOS or AIS at PCMA input, AIS is transmitted on PCM-B output.
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eli mi na ry Transmission Interface Handling DS1 1544 kbit/s Pr This page is intentionally left blank 434 (485) © Ericsson Radio Systems AB — All Rights Reserved — EN/LZT 720 0008 P2A 2001-11-28
PAGE 437
Terrestrial Link Handling 55 Terrestrial Link Handling This function specification covers RBS functions for layer 2 communication on A-bis. The function Layer 2 Link Handling is used for layer 2 signalling to/ from RBS. 55.1 References 55.2 ry Whenever a reference is made to a function described in another chapter, please refer to the table of contents to find the appropriate chapter.
PAGE 439
Channel Distribution Function 56 Channel Distribution Function This function specification covers RBS functions for Layer 2 communication on A-bis. The function Channel Distribution switches channels in the transport network interface to different RBS entities. The function Scanning of Terrestrial Channels makes it possible to communicate with RBS on a non-predefined terrestrial channel.
PAGE 440
Channel Distribution Function RSL Radio Signalling Link. Layer 2 communication link for traffical services on A-bis. Terrestrial Channel Terrestrial channels are physical channels for communication with, for example, the BSC over the Transport Network. There are different types of terrestrial channels, dependent on their use: ry – Terrestrial Signalling channels – Terrestrial Traffic channels Terrestrial signalling channels are used for LAPD signalling only. na Unoccupied Terrestrial Channel 56.
PAGE 441
Channel Distribution Function Configuration includes set-up of new connections and release of connections no longer required. Connections which are the same in the old and the new configuration are left undisturbed. Idle pattern is transmitted on unoccupied timeslots in the transport network interface. An unoccupied timeslot is a timeslot which has no channel assigned to it. The idle pattern is 01010100 for a 2 Mbit/s system and 01111111 for a 1.5 Mbit/s system.
PAGE 442
Channel Distribution Function 572-575 576-583 6 640-643 644-651 7 652-655 656-663 8 664-667 668-675 9 676-679 680-687 10 688-691 692-699 11 700-703 704-711 Concentration of LAPD signals ry 56.3.1 5 The purpose of LAPD concentration is to reduce the number of required physical links between the BSC and the BTS. This is done by allowing a number of TRXs to use the same physical transmission link for LAPD signalling between the BSC and the BTS.
PAGE 443
Channel Distribution Function • When the CMRU is in Local mode and the Remote button is pressed • When the CMRU is in Remote mode and (re-)started • When CF has lost its layer 2 connection to BSC • When the CF link is disconnected (reception of DISC command frame) RBS searches all terrestrial signalling channels, plus a number of unoccupied terrestrial channels, for data link establishment attempts directed towards CF.
PAGE 444
Channel Distribution Function CF Shared terrestrial signalling channel TRX Figure 146 ry 01_0299B Sharing terrestrial signalling channel Messages are sent forward to their destinations without adding, deleting or changing information. na Messages addressed to MO CF are sent to MO CF. All other messages are sent to the TRXs. The function terminates when MO CF has lost its data link connection. At termination, MO CF is disconnected from the shared terrestrial signalling channel.
PAGE 445
Channel Distribution Function A BSC RBS 1 B A RBS 2 ry B Figure 147 na A RBS 3 B 02_0301A Linear Cascade Connection The multidrop function only handles 64 kbit/s timeslots. eli mi A 64 kbit/s timeslot is considered to be used by the RBS if any of its subtimeslots are configured in the IS or used for the CF or remote OMT link or used for DXX communication. If, for example, ICP 7 is used in the IS configuration, the whole timeslot 2 is considered to be used by the current RBS.
PAGE 446
Channel Distribution Function PCM A PCM B PCM A RBS 1 TS PCM B RBS 2 1 2 3 4 ry 5 6 Figure 148 na 7 Multidrop example eli mi All timeslots not used by the own RBS are transparently connected between PCM A and PCM B. The timeslots used by the RBS will be connected from PCM A to the respective destination in the RBS. These timeslots will have valid idle pattern transmitted on PCM B and incoming data on PCM B is ignored.
PAGE 447
Channel Distribution Function The RBS searches for Remote OMT link establishment on PCM A timeslot 23 whenever this timeslot is not used by other functions.
PAGE 449
Transport network O&M functions-DXX Support 57 Transport network O&M functions-DXX Support 57.1 Introduction This Function Specification covers RBS functions for Transport Network Operation and Maintenance.
PAGE 450
Transport network O&M functions-DXX Support BSC DXX Transport Module DXX RBS 2000 ry NMS na DXX Support RBS 2000 P002615B eli mi DXX Support RBS 2000 Figure 149 Example of DXX support in an RBS 2000 network. The RBS 2000 nodes including the DXX support functions will be visible as nodes in DXX/NMS, and the layer 1 transmission in the RBS nodes will be supervised from NMS.
PAGE 451
Transport network O&M functions-DXX Support 57.3 Concepts In Figure 150 on page 449, the nomenclature for DXX is stated. DXX (Transmission system for cellular applications) NMS DXX node DXX node DXX node RBS RBS PCM-B PCM-A PCM-B PCM-A DXX support DXX support na BSC ry DXX node (TNO&M) DXX transmission network Figure 150 P002616 DXX terminology. DXX is a transmission system for cellular applications. It includes O&M and switching functionality (among others).
PAGE 452
Transport network O&M functions-DXX Support 57.4 Functions 57.4.1 Enabling and detection of TNOM protocol This function is initiated when the parameter TNOM_use in the RBS database is set to on. This function is used to control the enabling and disabling of the Transport Network O&M functions in RBS 2000. The parameter TNOM_use stored in RBS DB is used for this. ry When the function is disabled no management timeslot is dedicated for the Transport Network O&M functions.
PAGE 453
Transport network O&M functions-DXX Support 57.4.4 DXX Node access control This function is initiated during restart of the DXU if the parameter TNOM_use in RBS DB is already set to ON, otherwise the function is initiated when the parameter is set to ON. The RBS support a node access control that is used to limit access rights to the node from DXX. This function maintains the node access registers. ry The value for node access possible to set from DXX are 1 to 65535 for limited access rights.
PAGE 454
Transport network O&M functions-DXX Support The fault conditions monitored within the common parts of the RBS are: • Flash check sum error A problem has been found when saving parameters to the non-volatile memory. • Reset ry There has been a unit reset (detected always after the power-up of the unit), and the TN O&M functions has restarted. The reset is reported as a delta alarm event. With delta alarm event means an event has occurred but is still not active.
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Transport network O&M functions-DXX Support • Rx Buffer slip/BUFIN (Slip) This fault is only used for E1. The fault is activated if one or more buffer slips have been detected during the last hour. A slip is defined as where one frame (0.125 ms) is either lost or duplicated. • Status for CSU line loop back, LLB (T1) This message is only used for T1. It indicates that the CSU line loop back is activated. • Status for CSU payload loop back, PLB (T1) 57.4.
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Transport network O&M functions-DXX Support Each of the statistics are supported by two groups of registers and two groups of counters providing the performance data. The registers and counters can be read and reset. They are: • Counters for current 15 minutes report • Registers for previous 15 minutes report • Counters for current 24 hours report • Registers for previous 24 hours report ry The information of the 15 minutes counters and registers are sent together in one report.
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Transport network O&M functions-DXX Support part of the unavailable time. A new period of available time begins at the onset of 10 consecutive seconds with no SES detected. These 10 seconds are considered to be part of the available time. SES A severely errored second (SES) is a second with at least one of the following events.
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Transport network O&M functions-DXX Support - Alarm indication signal (AIS) The SES is performed in accordance with [TIH_E1] and [TIH_T1]. DM One minute interval with one of the following but not SES or UAT: For E1 system: - 123 CRC errors (when CRC is used) ry - 2 faulty FSW (when CRC is not used) and for T1 system: - 52 CRC errors Numbers of CRC errors from far end is indicated by the E-bit in time slot 0. Only used when the node is configured for CRC-4.
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Transport network O&M functions-DXX Support Fault freezing It is in RBS possible to set a fault mask to freeze fault monitoring of a specified block at a specified period of time. The blocks are PCM-A, PCM-B and Common parts (SW faults). The time out value is 0 to 10 000 000 seconds. Fault masks ry With the fault freezing activated the fault status of the RBS is frozen, i.e. the faults are neither updated nor reset.
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Transport network O&M functions-DXX Support Both CSU line loop back and CSU payload loop back have higher priority than the DXX line loop. This means that the DXX loop will be suspended when CSU loops (PLB or LLB) is activated. When CSU loop is deactivated, the DXX loop is resumed again. 57.4.11 DXX Node inventory This function is initiated during restart of the DXU if the parameter TNOM_use in RBS DB is already set to ON, otherwise the function is initiated when the parameter is set to ON.
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Transport network O&M functions-DXX Support TNOM timeslotThe parameter used for the Transport Network O&M Timeslot allocation is:TNOM_timeslot The valid range of the parameter is:1–31 for E11–24 for T1 TNOM node IdThe parameter used for the Transport Network O&M Node Id allocation is:TNOM_nodeid The valid range of the parameter is:1–65534 57.4.13 ry The parameters can be modified from the OMT. The parameter TNOM_nodeid can be modified from DXX as well. The new settings are activated immediately.
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Transport network O&M functions-DXX Support A message that is received at PCM-A in RBS is processed according to layer 1, 2 and 3. In layer 3, the destination node id is housed. If the current RBS is the destination node, the message is sent to layer 7. If the RBS is in topology ’Cascaded chain’ and not the destination node, the message is sent to the next RBS via PCM-B. The same is valid in the other direction receiving data on PCM-B.
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BTS Parameter Limitations 58 BTS Parameter Limitations This document specifies configurable BTS parameters with limitations compared with the parameter ranges in the Abis O&M IWD. BTS parameters with no limitations compared to the Abis O&M IWD are not stated in this document. 58.1 Purpose and Readers The purpose is to show BTS parameters with parameter range limitations compared to the Abis O&M IWD. 58.
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BTS Parameter Limitations IWD-defined value range: 58.3.3 0–1 BS_AG_BLKS_RES BTS-supported value range: 58.3.4 BS_AG_BLKS_RES: 0–1 IWD-defined value range: 0–7 CON Connection List ry BTS supported value range: y 0 – 12 mi 2 – 13 CCP number Reserved 256, 260, ... 348 0 – 255, 257 – 259, 261 263, ...
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BTS Parameter Limitations 0–1 L/R SWI: 0–1 TRA: 0–1 PCM SYNC: 0–1 EXT SYNC: 0 IWD-defined value range: 0–1 LMT: 0 External Condition Map Class 2 BTS-supported value ranges: 0–1 na RBS DOOR: LAPD Q CG: 0 EXT SYNC: 0 0–1 eli mi PCM SYNC: IWD-defined value range: 58.3.8 ry 58.3.7 L/R TI: 0–1 File Relation Indication BTS-supported value ranges: Other state: 0, 3 IWD-defined value range: 0–3 Note: FN Offset Pr 58.3.
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BTS Parameter Limitations ARFCN, 1800 MHz: 512 – 885(dec) ARFCN, 1900 MHz: 512 – 810(dec) Note: Valid 900 MHz "option" is dependent on hardware configuration. IWD-defined value range: 0 – 124, 975 – 1023, 955 – 974(dec) ARFCN, 1800 MHz: 512 – 885(dec) ARFCN, 1900 MHz: 512 – 810(dec) ry 58.3.
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BTS Parameter Limitations 58.3.13 IS Connection List BTS-supported value range: ICP: 4 – 127(dec) 132 – 351(dec) 512 – 583(dec) 640 – 711(dec) CI: 1 – 72(dec) The IWD-defined value ranges: 0 – 1023(dec) CI: 1 – 255(dec) 58.3.14 There are limitations for specific combinations. For more information see the figure in Appendix. na Note: ry ICP: Local Access State BTS-supported value range: Local Access State parameter: 0 58.3.
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BTS Parameter Limitations BTS-supported value range. Nominal power parameters: 1 900 MHz: 35 – 47, 49 1800 MHz: 33 – 45, 47 1900 MHz: 33 – 45, 47 IWD-defined value range: 0 – 63(dec) 1 (dec) 1 (dec) Only steps by 2 is configurable (from the highest value). ry Note: (dec) 58.3.18 Result Code BTS-supported codes: na 1) BSC uses this value to activate SW Power Boost (the value does not describe the actual output power).
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BTS Parameter Limitations Appendix TS2 PCM-A . o o o o o o o o o o o 122 123 124 125 126 127 o o o o o o 132 133 134 135 136 137 138 139 140 141 142 o o o o o o o o o o o 250 251 252 253 254 255 o o o o o o . TS31 . SCH1 SCH2 . o o o o 348 349 350 351 o o o o o o o o o o o o 512 513 514 515 516 517 518 519 520 521 522 523 CCP 256 o 257 o 258 o 259 o 260 o 261 o 262 o 263 o TS2 PCM-B .
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Glossary 59 Glossary This glossary lists abbreviations and acronyms used in texts dealing with RBS 2000 cabinets. Some basic terms and acronyms needed for cross-reference are included in the list. Terms and Abbreviations An arrow ⇒ is used to indicate a reference to another entry in this list.
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Glossary AT Alphanumeric Terminal ATRU Adaptive Transceiver Unit ATSR Air Time Slot Resource AU Antenna Unit GSM 900 = CEU + Passive Antenna GSM 1800/1900 = AAU BALance and UNbalance transformer Batt Battery BB Battery Box BBS Battery Back-up Stand na ry BALUN BCCH Broadcast Control CHannel Downlink only broadcast channel for broadcast of general information at a base station, on a base station basis.
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Glossary GSM network logical unit comprising one BSC and one or more BTSs. BTS Base Transceiver Station GSM network unit operating on a set of radio frequency channels in one cell. A portion of digital information, the physical content, that is transferred within the time interval of one time slot. Cabinet The physical housing of a base station Cascade connections Connection of several cabinets by the PCM cable. Similar to serial connection.
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Glossary Channel Combination A physical channel on an air interface carrying a defined set of logical channels. Channel group A channel group is a group of dedicated logical channels to a specific MS. CM Control Module (for TMA) CMD Digital Radio Communication Tester CMRU Central Main Replaceable Unit. Main RU. ry The RBS is physically connected to the Base Station Controller (BSC) via the CMRU. There is only one CMRU in each RBS.
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Glossary DC Direct Current DCC Digital Cross Connector DCCH Dedicated Control CHannel Dedicated control channels carry signalling data. DC Connection Unit ddTMA Dual Duplex Tower Mounted Amplifier ry DCCU This type needs only one combined TX/ RX feeder from the BTS to the TMA. ⇒ dTMA ⇒ rTMA ⇒ TMA ⇒ BTS DFU DIP Distribution Frame na DF Distribution and Fuse Unit DIgital Path eli mi The name of the function used for supervision of the connected PCM lines.
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Glossary dTMA is similar to the old ALNA except for different characteristics. ⇒ ddTMA ⇒ rTMA ⇒ TMA double Transceiver Unit DU Distribution Unit (RU in CDU-D) DUT Device Under Test DX Direct Exchange DXB Distribution Switch Board DXC Digital Cross Connector DXU Distribution Switch Unit DXX Ericsson Cellular Transmission System including NMS na ry dTRU E1 Short for G.
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Glossary ESD ElectroStatic Discharge ESO Ericsson Support Office ETS European Telecommunication Standard EXT External FACCH Fast Associated Control CHannel ry Main signalling channel in association with a TCH.
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Glossary GSM system 900 MHz (generic) GSM 1800 (GSM-based) Digital communication system 1800 MHz (generic) GSM 1900 (GSM-based) Digital communication system 1900 MHz (generic) HCE HDSL Central Equipment HCOMB Hybrid COMBiner HDLC High level Data Link Control HDSL High bit rate Digital Subscriber Line Heat Exchanger A version of the climate unit HEU Heat Exchanger Unit na ry GSM 900 HISC Highway Splitter Combiner HLIN High Level IN High Level OUT eli mi HLOUT HMS Heat Management S
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Glossary International Mobile Subscriber Identity INIT Initial INT Internal IOG Input/Output Group IOM Internal Operation and Maintenance bus IR InfraRed IS Interface Switch IWD InterWork Description JTC Joint Technical Committee na ry IMSI LAPD Link Access Procedures on D-channel LAPD is the data link layer (layer 2) protocol used for communication between the BSC and the BTS on the Abis interface. eli mi Abis layer 2 is sometimes used synonymously with LAPD.
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Glossary CCHs Control CHannels, for control signalling. ⇒ Physical Channel ⇒ Channel Combination Logical RU A unit which can be referred to, but is not a single physical unit. There are three different kinds of logical RUs: 1. Buses ry 2. Antennas 3. Environment Loss Of Signal LVD Low Voltage Directive na LOS LVF Low Voltage Filter MAC Medium Access Controller MADT Mean Accumulated DownTime A magazine is a reserved space in the cabinet, which may hold one or more RUs.
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Glossary Mean Time Between Catastrophe Failure Multidrop Two or more RBSs are connected in a chain to the same transmission system. All the relevant time slots are dropped out by each RBS. (This function is sometimes called cascading.) NCS National Colour System NEBS Network Equipment Building System NMS Ericsson Network Management System in DXX Nominal Power The nominal power is the power level defined when configuring the transceiver.
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Glossary Power Amplifier Module Passive RU A passive replaceable unit has a very low level of intelligence and is independent of the processor system. PBA Printed Board Assembly PBC Power and Battery Cabinet PC Personal Computer PCAT Product CATalogue ry PAM A web-based ordering system on Ericsson’s Intranet. Printed Circuit Board na PCB PCH Paging CHannel Downlink only subchannel of CCCH for system paging of MSs.
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Glossary users, interworking with a fixed network is necessary. Personal Protective Equipment PREFL Power Reflected PSA Power Supply Adapter PSU Power Supply Unit PWU Power Unit RACH Random Access CHannel ry PPE na Uplink only subchannel of CCCH for MS request for allocation of a dedicated channel. ⇒ CCCH RAI RAM Random Access Memory Radio Bit Error Ratio eli mi RBER Remote Alarm Indication RBS Radio Base Station All equipment forming one or more Ericsson base station.
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Glossary RS232 American standard for term/MODEM interconnection rTMA Receiver TMA rTMA has no duplexers. It is used for amplification of the RX signal. ⇒ ddTMA ⇒ dTMA ⇒ TMA RTN Return RU Replacement Unit ry An RU consists of one or more HWUs. An RU may be replaced by another RU of the same type. The RU is the smallest unit that can be handled on site.
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Glossary SIR Small Indoor RBS SMS Short Message Service (point to point) A short message, up to 160 alphanumeric characters long, can be sent to or from an MS (point to point). Service Object SS Swedish Standard Sub-RU A sub-replaceable unit is always connected to a superior Main RU. This connection is used for example for retrieval of the RU identity. A sub-RU normally does not have a processor. Note that an RU with a processor, which cannot be loaded, is classified as a sub-RU.
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Glossary TEI Terminal Endpoint Identifier TEI is an identification code carried by a LAPD frame as a terminal connection endpoint within a Service Access Point (SAP). TEst Mobile Station TF Timing Function TG Transceiver Group Timing bus The timing bus carries air timing information from the timing unit in the DXU to the TRUs. TLS Terrestrial Link Supervision na ry TEMS TM Transport Module The Transport module is non-RBS equipment belonging to the transport network.
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Glossary A 0.577 ms period (TDMA frame subunit) corresponding to 156.25 raw bits of information. The eight time slots of each TDMA frame are numbered 0...7.