Guide to GSM 3900 Series BTSs Solution in 2012 V1.2

Guide to GSM 3900 Series BTSs Solution in 2012

Issue Date

1.1 2012-09-22

HUAWEI TECHNOLOGIES CO., LTD.

Copyright Huawei Technologies Co., Ltd. 2012. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissionsand other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.

NoticeThe purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.Address: Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China Website: Email: http://www.huawei.com [email protected]

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About This DocumentChange HistoryDate 2011-3-31 2011-6-27 Issue V1.0 V1.1 Details Initially released the new template.

Author Fu Qin Fu Qin

Added the VAMOS supporting specifications of V3 modules. Updated the VAMOS and EDGE power backoff specifications. Removed the EDGE+ specifications. Removed the description of power backoff for EDGE+. Changed the instantaneous transmit bandwidth of V3 modules to 35 MHz. Updated the functions that are conflicted with VAMOS. Added the output power tolerance of V3 modules. Updated the model of the gateway that matches BTS3900B. Added the configuration principles of UPEUc and FANc. Changed the frequency band that the MRFUe 1800 MHz works for China Mobile only from low 60 MHz to low 45 MHz. Added the description on the MRFUd P25M module. Updated the contents in section 2.2.12 Public Network BTS Co-existing with GSMR." Added the output power of 2T2R modules that work in single-TX mode. Added the application scenarios of the UBRI. Updated the V3 module supporting scenarios and restrictions of new and old cabinets.

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Date 2011-10-11

Issue V1.2

Details

Author Fu Qin

Modified the gain of the integrated 1800 MHz directional antenna of the BTS3900E. Added the RRU3942 and RRU3926. Deleted descriptions of the RRU3029. Added the UTRPc. Updated the specifications of cells and TRXs per site. Added the versions that support Ver.C cabinets and the limitations. Added the BTS3900AL cabinet. Added the description that the UTRPb4 does not support the IP over E1 function. Updated the differences of the functions supported by the GTMU and GTMUb. Added the V3 AC RRU. Added the functions of GBSS14.0. Added the function of MRFUe in supporting 1 x 125 W specifications at 900 MHz. Updated the frequency bands supported by the modules. Added the configuration conditions for the Power Sharing Between Boards function. Added information about CPRI optical module handovers. Added description on RRU3922E. Modified the description that the GTMUa and UTRPc boards do not support the GBFD-117803 Abis Transmission Backup feature. Updated the QoS requirements for the GSM transmission network. Added principles for mixed configuration among different types of modules. Modified EDGE specifications. Added specifications for each RF module in supporting EICC and AFC. Modified the descriptions on TMA and RET. Supplemented the time when the patch versions are supported in section 2.2.24 "AC/DC Power System Transparent Transmission Path Supported by BBU." Added restrictions in using the Um interface software synchronization and IBCA functions in section 2.2.28 "Um Interface Software Synchronization and IBCA." Added section 2.2.27 "SDCCH Specifications Supported by RF Modules."

2012-4

V1.0

Fu Qin

2012-6

V1.1

Fu Qin

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ContentsAbout This Document ..................................................................................................................... 3 1 Product Description ...................................................................................................................... 91.1 Overview .......................................................................................................................................................... 9 1.2 Introduction to 3900 Series BTSs .................................................................................................................. 10 1.2.1 BTS3900 Cabinets ................................................................................................................................ 10 1.2.2 BTS3900L ............................................................................................................................................. 11 1.2.3 BTS3900A ............................................................................................................................................ 12 1.2.4 DBS3900 ............................................................................................................................................... 12 1.2.5 Ver.C Cabinet ........................................................................................................................................ 13 1.2.6 BTS3900AL .......................................................................................................................................... 14 1.2.7 BBU3900 .............................................................................................................................................. 15 1.2.8 RF Module ............................................................................................................................................ 21 1.2.9 Multi-carrier Module............................................................................................................................. 26 1.2.10 DRFU .................................................................................................................................................. 33 1.2.11 GRFU V1/V2 ...................................................................................................................................... 34 1.2.12 MRFUd ............................................................................................................................................... 35 1.2.13 MRFUe ............................................................................................................................................... 36 1.2.14 RRU3004 ............................................................................................................................................ 36 1.2.15 RRU3008 V1/V2................................................................................................................................. 37 1.2.16 RRU3929 ............................................................................................................................................ 40 1.2.17 RRU3926 ............................................................................................................................................ 41 1.2.18 RRU3942 ............................................................................................................................................ 41 1.2.19 RRU3922E .......................................................................................................................................... 41 1.2.20 AC RRU .............................................................................................................................................. 42 1.2.21 GATM ................................................................................................................................................. 45 1.2.22 Matching Between V3 RF Modules and Cabinets .............................................................................. 45 1.2.23 Support of V3 RF Modules by Inventory Cabinets ............................................................................. 45 1.3 Introduction to the BTS3900E ....................................................................................................................... 46 1.3.1 Types of the BTS3900E ........................................................................................................................ 47 1.3.2 BTS3900E Integrated Antenna ............................................................................................................. 48 1.3.3 Restriction of the BTS3900E ................................................................................................................ 49 1.3.4 RF Specifications of the BTS3900E ..................................................................................................... 49

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1.3.5 Installation and Application Scenarios .................................................................................................. 51 1.3.6 BTS3900E Power Supply Solution ....................................................................................................... 52 1.3.7 BTS3900E Monitoring Solution ........................................................................................................... 53 1.3.8 Special Functions of the BTS3900E ..................................................................................................... 53 1.4 Introduction to the BTS3900B ....................................................................................................................... 57 1.4.1 BTS3900B Equipment .......................................................................................................................... 58 1.4.2 Antenna ................................................................................................................................................. 58 1.4.3 Port Specifications ................................................................................................................................ 59 1.4.4 Radio Performance Specifications ........................................................................................................ 60 1.4.5 Coverage Capability of the BTS3900B ................................................................................................. 61 1.4.6 Installation and Application Scenario of the BTS3900B ...................................................................... 61 1.4.7 BTS3900B Power Supply Solution ....................................................................................................... 62 1.4.8 Special Functions of the BTS3900B ..................................................................................................... 64

2 Version Features and Solutions ............................................................................................... 712.1 Brief Introduction to BTS3900 Series Versions ............................................................................................. 71 2.1.1 BTS3900 Series and Related Versions .................................................................................................. 71 2.1.2 Differences of Versions ......................................................................................................................... 72 2.1.3 GBSS8.0 Version Features .................................................................................................................... 73 2.1.4 GBSS8.1 Version Features .................................................................................................................... 73 2.1.5 GBSS9.0 Version Features .................................................................................................................... 74 2.1.6 GBSS12.0 Version Features .................................................................................................................. 75 2.1.7 GBSS13.0 Version Features .................................................................................................................. 75 2.1.8 GBSS14.0 Version Features .................................................................................................................. 76 2.2 Brief Introduction to Solutions ....................................................................................................................... 76 2.2.1 RF Module Tolerance in Normal Temperature...................................................................................... 76 2.2.2 Inter-GRFU RF FH Function ................................................................................................................ 76 2.2.3 EDGE Specifications ............................................................................................................................ 77 2.2.4 EDGE+ Specifications .......................................................................................................................... 78 2.2.5 VAMOS Specifications ......................................................................................................................... 79 2.2.6 Power Backoff Specifications of Different Modulation Modes ............................................................ 80 2.2.7 RET Antenna Function .......................................................................................................................... 83 2.2.8 BTS External Gateway Supporting IPSec ............................................................................................. 84 2.2.9 Monitoring Device IP Access ................................................................................................................ 84 2.2.10 Macro BTS + DBS .............................................................................................................................. 84 2.2.11 RRU Monitoring Capability ................................................................................................................ 85 2.2.12 Public Network BTS Co-existing with GSMR ................................................................................... 86 2.2.13 DC-BLOCK Solution in Railway Tunnel Scenario ............................................................................ 89 2.2.14 Anti-Interference Solutions in Different Scenarios ............................................................................. 89 2.2.15 Dual-gateway Backup Function Supported by the Pico BTS ............................................................. 93 2.2.16 TRX Backup Function Supported by the Pico BTS ............................................................................ 93 2.2.17 Specifications of RRU Power Cables ................................................................................................. 94

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2.2.18 V3 Platform-Based AC RRU Solution ................................................................................................ 94 2.2.19 Comparison of Functions Supported by the GTMU, GTMUb, UTRPb4, and UTRPc ....................... 97 2.2.20 IPSec and PKI ..................................................................................................................................... 98 2.2.21 Built-in Firewall Function ................................................................................................................... 99 2.2.22 21-Level RRU Cascading ................................................................................................................. 100 2.2.23 Specifications for Transmission Distance over the Abis Interface .................................................... 100 2.2.24 AC/DC Power System Transparent Transmission Path Supported by BBU ..................................... 101 2.2.25 Mixed Configuration Among Different Types of RF Modules ......................................................... 101 2.2.26 EICC, AFC, and Um Interface Speech Frame Repairing .................................................................. 102 2.2.27 SDCCH Specifications Supported by RF Modules ........................................................................... 103 2.2.28 Um Interface Software Synchronization and IBCA .......................................................................... 104

3 Networking and Configuration.............................................................................................. 1053.1 Networking Capability ................................................................................................................................. 105 3.1.1 Networking over the Abis Interface .................................................................................................... 105 3.1.2 Inter-BTS Networking ........................................................................................................................ 106 3.2 BBU and RFU/RRU Networking ................................................................................................................. 106 3.2.1 CPRI Capability and Rules ................................................................................................................. 106 3.2.2 Capability of the GTMU ..................................................................................................................... 107 3.3 RFU Configuration....................................................................................................................................... 108 3.3.1 Configuration of the DRFU ................................................................................................................ 108 3.3.2 Configuration of the GRFU ................................................................................................................ 110 3.4 RRU Configuration ...................................................................................................................................... 112 3.4.1 Optical Port Configuration of the RRU............................................................................................... 112 3.4.2 Configuration of the RRU3004 ........................................................................................................... 113 3.4.3 Configuration of the RRU3008 ........................................................................................................... 113 3.5 BTS3900E Configuration ............................................................................................................................. 113 3.5.1 Networking Capability of the BTS3900E on the Abis Interface ......................................................... 113 3.5.2 Capability of the BTS3900E of Forming a Synchronous Site ............................................................ 114 3.5.3 Cell Configuration Capability of the BTS3900E ................................................................................ 115 3.6 BTS3900B Configuration ............................................................................................................................ 115 3.6.1 Transmission on the Private Network ................................................................................................. 115 3.6.2 Transmission on the Public Network .................................................................................................. 116

4 Evolution and Compatibility .................................................................................................. 1204.1 Evolution Capability .................................................................................................................................... 120 4.2 Forward Compatibility ................................................................................................................................. 120

5 Environment Adaptability and Reliability .......................................................................... 1215.1 Environment Adaptability ............................................................................................................................ 121 5.1.1 Environment Adaptability of the BTS3900/A/L/DBS3900 ................................................................ 121 5.1.2 Environment Adaptability of the BTS3900E ...................................................................................... 121 5.1.3 Environment Adaptability of the BTS3900B ...................................................................................... 122 5.2 Reliability ..................................................................................................................................................... 123

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5.2.1 System Reliability ............................................................................................................................... 123 5.2.2 Hardware Reliability ........................................................................................................................... 123 5.2.3 Software Reliability ............................................................................................................................ 123 5.2.4 Reliability Specification ...................................................................................................................... 123

6 FAQ .............................................................................................................................................. 1246.1 Macro BTSs ................................................................................................................................................. 124 6.2 DBS .............................................................................................................................................................. 125 6.3 BTS3900B .................................................................................................................................................... 126

A Acronyms and Abbreviations ................................................................................................ 128

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11.1 OverviewTable 1-1 GSM3900 series BTSs BTS Name BTS3900 BTS3900L BTS3900A BTS Type Indoor macro BTS Indoor macro BTS Outdoor macro BTS Outdoor macro BTS DBS Module BBU + RFU BBU + RFU BBU + RFU BBU + RFU BBU + RRU

Product Description

Huawei GSM 3900 series BTSs are developed on the basis of the unified BTS platform for Huawei wireless products. Modules of different modes (GSM, WCDMA, and LTE) can be inserted in one cabinet, which effectively addresses the requirements of operators for multi-mode BTSs and facilitates the smooth evolution from GSM BTSs to multi-mode BTSs. Since 2008, 3900 series BTSs have been sold worldwide as mainstream products. Table 1-1 lists GSM 3900 series BTSs.

Remarks Independent cabinet; 6 RFUs per cabinet in full configuration Independent cabinet; 12 RFUs per cabinet in full configuration Combined cabinets (not separable). The BBU is built in the APM30H/TMC11H. In full configuration, a single RFC supports six RFUs. Independent cabinet; 9 RFUs + 9 RRUs per cabinet in full configuration The BBU is built in the APM30H/TMC11H (the OR workflow is required for other devices). The RRU is connected to the BBU using an optical cable. Also called micro BTS -

BTS3900AL DBS3900

BTS3900E BTS3900B

Compact BTS Pico BTS

Integrated design Integrated design

The DRFU and RRU3004 (also called DRRU) are double-transceiver RF modules, and the BTS3900B also uses the double-transceiver RF architecture. The GRFU and RRU3008 (alsoHuawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd

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called GRRU) are multi-carrier RF modules, and the BTS3900E also uses the multi-carrier RF architecture. For details on the overall structure, interfaces, and counters specifications of the GSM 3900 series BTSs, see documents such as the GSM 3900 series BTSs Product Description and the GSM Product Specification.

1.2 Introduction to 3900 Series BTSs1.2.1 BTS3900 CabinetsType of BTS3900 cabinetsThe BTS3900 supports 48 V/+24 V DC power input and 220 V/110 V AC power input. The 48 V DC BTS3900 is the most widely used BTS. Figure 1-1 shows the 48 V DC BTS3900. Figure 1-1 48 V DC BTS3900

Vehicle-Mounted BTS3900 CabinetThe vehicle-mounted BTS3900 consists of the 48 V cabinet, four vibration isolators (for base installation), two dampers (for the installation of the cabinet against the vehicle), base (including the vehicle-mounted attachment plate), and module attachment plate or spacing plate (for the installation of TRX modules), which improves the vibration-proof capability of the cabinet and ensures that the BTS can work normally in vibrating scenarios. The vehicle-mounted BTS3900 is applicable in the scenarios such as sudden natural disaster, large assembly, exhibition, emergent swap, and hot-spot or blind spot coverage. The vehicle-mounted BTS3900 is placed in the mobile container or middle-sized vehicle. All modules, board components, and cables are already installed in advance. After the antenna is raised through the adjustable pole and the grounding stake is secured, the BTS can start working. The vehicle-mounted BTS3900 is delivered in GBSS9.0. The vehicle-mounted BTS3900 supports only 48 V power input. The internal modules and cables in the vehicle-mounted

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BTS3900 cabinet are the same as those in an ordinary cabinet. Note that the DCDU of the vehicle-mounted BTS3900 is installed in the 1 U space above the BBU, different from an ordinary cabinet (the DCDU of the ordinary cabinet is installed in the 1 U space below the BBU). Currently, the vehicle-mounted BTS3900 supports only manual quotation. If the product description of the vehicle-mounted BTS3900 is required, contact the market representative.

Power Supply of the BTS3900For details, see the Guide to 3900 Series BTSs Solution in 2012 released at http://3ms.huawei.com.

1.2.2 BTS3900LThe BTS3900L has the same components as the BTS3900. The BTS3900L, however, can house 12 RFUs, two times the number of RFUs that the BTS3900 houses. Currently, the BTS3900L supports only the 48 V DC input power. In the case of +24 V DC input power, the BTS3900 cabinet (+24 V DC) is used. In the case of AC input power, an external power system can be configured together with the BTS3900L, or the BTS3900 cabinet can be used. Figure 1-2 Appearance of the 48 V DC BTS3900L and internal structure of the 48 V DC BTS3900L

Filler panels need to be installed in vacant RFU slots to avoid air leakage that may affect the heat ventilation. When two GATMs are configured, they are installed in the lower 2 U space of the 4 U space for customer equipment in the BTS3900L cabinet. The upper 2 U space is reserved for transmission equipment.

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CAUTIONThe BTS3900L is recommended for new or swapped indoor sites. The BTS3900 is used for capacity expansion of the original BTS3900. The BTS3900L and BTS3900 cannot be configured together at a site.

1.2.3 BTS3900AThe BTS3900A includes the APM30H, TMC11H, RFC, and BBC. Table 1-2 lists the typical combination of the BTS3900A. Table 1-2 Typical combination of the BTS3900A Scenario AC (without backup power) AC (with backup power) 48 V DC Combination APM30H + RFC APM30H + RFC + IBBS200D/IBBS200T TMC11H + RFC

The BTS3900A does not support +24 V power supply. If the +24 V power supply is required, submit an OR workflow. Precautions:

In BTS3900A application, the APM30H must be stacked with the RFC. The APM30H can be installed on the floor, pole, or wall only in DBS application. In BTS3900A application, an independent AC power cabinet cannot directly work with the RFC although the APM or TMC is combined with the RFC. That is, the AC power cabinet (for example, TP48200A) cannot replace the APM or TMC for installation to the BBU and then work with the RFC. If the TP48200A power system is required, you must use the TP48200A + 48 V DC BTS3900A. The BBU must be installed in the 48 V APM30.

The APM30H cabinet supports built-in 24 Ah lead-acid batteries (occupying 3 U space for customer equipment) to provide power backup for a short period. When built-in batteries are used, the average power consumption of the BTS cannot exceed 2300 W and the built-in batteries cannot be used with the BBC at the same time. This solution is not promoted in the product description. This solution is available in short-term power backup scenarios. For details on the configuration, contact R&D department. The APM30H cabinet does not support smoke sensor and water sensor alarms. If smoke sensor alarms are required, contact Wang Qihua in the R&D department. The APM30H cabinet is delivered with the temperature sensor and door status sensor.

1.2.4 DBS3900Similar to the BTS3900A, the DBS3900 includes the APM30H, TMC11H, and BBC. For details on the cabinets, see the related description of the BTS3900A. Table 1-3 lists the typical combination of the DBS3900.

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Table 1-3 Typical combination of the DBS3900 Scenario 220 V AC (without backup power) 220 V AC (with backup power) 48 V DC +24 V DC (Ver.C is not supported) Combination APM30H (built-in BBU) + RRU APM30H (built-in BBU) + RRU + IBBS200D/IBBS200T TMC11H (built-in DCDU and BBU) + RRU TMC11H (built-in EPS48100D and BBU) + RRU

CAUTION

The APM200 cannot work with the DBS3900, but the APM30 can work with the DBS3900. The APM30H has different codes in distributed and separated BTS applications. The circuit breaker of the DC distribution unit is different in the two applications, that is, two types of APM30 are required for macro BTS + DBS. The APM30H also has different codes in 220 V (single-phase or three-phase) and 110 V inputs.

1.2.5 Ver.C CabinetThe preceding cabinets are MPE 303 cabinets. To assist the application of V3 RF high-power modules, Huawei performs optimization on the cabinets and provides Ver.C cabinets. The key point of the cabinet optimization is the improvement of heat dissipation and power supply capability. Ver.C cabinets adopt high-power fans that support quicker rotation speed; use more powerful DCDU (with the current capability of a single circuit breaker changed from 12 A to 25 A) and PSU (with the current capability of a single PSU changed from 30 A to 50 A, and power capability changed from 1600 W to 2900 W); adopt better air ventilation (the BBU air ventilation is separated from the RFU air ventilation so that the BBU outflow air does not affect the inflow temperature of the RFU module); and use better power cables (with the cross-sectional area changed from 1.5 mm2 to 2.5 mm2). The appearance, size, and engineering installation ports of Ver.C cabinets are not changed. Optimized indoor BTS3900 cabinets support 48 V power input. The built-in 3U EPS48150 power system supports AC power input but +24 V DC power input. Optimized BTS3900L cabinet supports 48 V power input only and there is no built-in power system in the cabinet. In the scenario of AC power input, the external power system or the BTS3900 AC cabinet is used. There are following requirements on air breakers: The BTS3900 uses 2 x 80 A breaker or 1 x 160 A fuse and requires the customer to provide two 80 A power inputs or one 160 A power input. The BTS3900L requires the customer to provide four 80 A power inputs or two 160 A power inputs. If the customer cannot provide the required breaker, change the requirement by adjusting the module configuration. For details on the corresponding requirements on circuit breakers and cables, see the 3900 Series Base Station Site Solution Guide of 2012 V1.1 (20120425). For outdoor cabinets, the optimized cabinet types are as follows: heat exchanging outdoor power cabinet (APM30H), direct ventilation outdoor RF cabinet (RFC), direct ventilation

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outdoor battery cabinet (IBBS200D), TEC thermoelectric cooling outdoor battery cabinet (IBBS200T), and heat exchanging outdoor transmission cabinet (TMC11H). One BTS3900A supports a maximum of six V3 RFUs. The DBS3900 single power system supports a maximum of six 2 x 60 W RRUs. The APM30H supports a maximum of one built-in 650 W BBU. The Ver.C cabinet uses the 150 A power system and is configured with three PSUs. The power of each PSU is 2900 W, and the power conversion efficiency is 96%. Ver.C cabinets are supported by GBSS8.1 and later versions, with limitations listed in the following table. Cabinet Type BTS3900/BTS3900A Software Version Support Supported in GBSS8.1 Specification Limitation

The electronic serial number (ESN) of the cabinet is not supported. The AC BTS3900 and BTS3900A do not support the ESN of the PSU. The AC BTS3900 cannot update or load PSU software. The AC BTS3900 and BTS3900A do not support the ESN of the PSU. The AC BTS3900 and BTS3900A cannot update or load PSU software. The AC BTS3900 and BTS3900A do not support the ESN of the PSU. The AC BTS3900 and BTS3900A cannot update or load PSU software.

Supported in GBSS9.0

Supported in GBSS12.0

Supported in GBSS13.0 BTS3900L Not supported in GBSS8.1 Supported in GBSS9.0 Supported in GBSS12.0 Supported in GBSS13.0

The PSU software cannot be updated or loaded.

None. None. None.

1.2.6 BTS3900ALIn GBSS14.0 and later versions, outdoor large BTS3900AL cabinets are supported. BTS3900AL cabinets are classified into two types: AC BTS3900AL cabinets and DC BTS3900AL cabinets. Figure 1-3 shows the appearance and internal structure of the BTS3900AL cabinet.

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Figure 1-3 Appearance and internal structure of the BTS3900AL cabinet

AC and DC BTS3900AL cabinets are supported. DC BTS3900AL cabinets cannot be used independently. When the AC power supply is adopted, only one AC BTS3900AL cabinet or the AC and DC BTS3900AL cabinets can be configured. For the site solution to BTS3900AL cabinets, see the 3900 Series Base Station Site Solution Guide of 2012 V1.1 (20120425) released at http://3ms.huawei.com. The TPS48600 cabinet is introduced in GBSS14.0 and is used together with the DBS3900. This cabinet supports a maximum of 12 high-power RRUs.

1.2.7 BBU3900The BBU3900 (hereinafter referred to as BBU) is a 2 U high subrack. It is a common component of the BTS3900/BTS3900A/BTS3900L/BTS3900AL and DBS3900 and implements different functions by insertion of different sub modules. The BBU is an indoor device that can be built in the BTS3900/BTS3900A/BTS3900L/BTS3900AL cabinet or installed in a standard 19-inch cabinet. The BBU must be installed in a cabinet with a heat exchanger instead of an outdoor cabinet working in direct-ventilation mode. Figure 1-4 Appearance of the BBU

The boards to be inserted into the BBU are mainly as follows: GTMU (the main control board), UTRP (the expanded transmission board), USCU (the satellite card clock board), UEIU (the monitoring board), and UPEU (the power module). The section describes certain boards. For the information about the other boards, see the Hardware Description Manual. For details on configuration principles, see the related configuration manual.

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Figure 1-5 BBU typical configuration

UPEU: The UPEU is the DC power input module and can be replaced on site. It supports 1+1 backup (the other module can be inserted in the UEIU slot.) A single UPEU supports eight Boolean alarm inputs and two RS485 alarm inputs, and the port type is RJ45. The Boolean alarm input ports are open. Whether the Boolean alarm is triggered by a high level or a low level depends on the setting on the OMC. The RS485 ports use private communication protocols. Therefore, the RS485 ports are only connected to the monitoring units of Huawei, such as the EMU and the EMUA. Figure 1-6 shows port IDs of external alarm inputs when two UPEUs are configured. Figure 1-6 Port IDs of external alarm inputs when two UPEUs are configured

The power module and fan in the BBU have been replaced since April 2011. The new power module and fan are called digital power board (UPEUc) and high-speed fan board (UFANc) respectively. UPEUc and FANc are supported by GBSS9.0 and later versions. The new and old power boards cannot be used at the same time. UPEUc: Table 1-4 lists the differences between the capabilities of the UPEUc and UPEU. Table 1-4 Differences between the capabilities of the UPEUc and UPEU Capability Band Carrying Capability Single-configuration Double-configuration UPEUc 360 W 650 W or 350 W (1+1 backup) UPEU 300 W 300 W (1+1 backup)

The configuration principle of the UPEUc is as follows: New site deployment scenarios:

If the power consumption of the BBU is smaller than or equal to 330 V, one new power module is delivered.

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If the power consumption of the BBU is greater than 330 V, two new power modules are delivered. If the BBU is required to support the power backup of lower than 330 V, two new power modules are delivered.

Capacity expansion scenarios: The old power module is promoted to support the power of 300 W, which is also the threshold for power capacity expansion. Actually, the power of 330 W is used in the power consumption calculating tool during configuration calculating.

If the power consumption of the BBU is smaller than or equal to 330 W after capacity expansion, no new power module is delivered. If the power consumption of the BBU is greater than 330 W after capacity expansion and the BBU is originally configured with one old power module, two new power modules are delivered and the old power module is not delivered. If the power consumption of the BBU is greater than 330 W after capacity expansion and the BBU is originally configured with one new power module, one more new power module is delivered. If the power consumption of the BBU is greater than 330 W after capacity expansion and the BBU is originally configured with two old power modules, two new power modules are delivered and old power modules are not delivered.

FANc: The rotation speed of the new fan is 6000 rpm, whereas that of the original fan is 4500 rpm. The cooling capability of the new fan is 650 W, whereas that of the original fan is 300 W. The configuration principle of the FANc is as follows: New site deployment scenarios: New fans are configured. Capacity expansion scenarios: outdoor cabinets in the A1 area. New fans are configured if the second power module is used. For details on the BBU support capability of inventory cabinets, see the Guide to SRAN 3900 Series BTSs Solution in 2011. GTMU: The GTMU is the main control and interface board. It is mandatory and performs the BTS transmission management, clock management, and control management. Figure 1-7 shows the GTMU panel. Figure 1-7 GTMU panel

Table 1-5 GTMU description Port Name CPRI 0 to CPRI 5 Description Provides communication between the BBU and the RF unit.

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Port Name ETH_R232 Ethernet port FE0 electrical port FE1 optical port USB port Test port E1/T1 socket

Description Performs local maintenance and commissioning. Connects the BBU to a routing device in the equipment room through the Ethernet cable to transmit network information. Connects the BBU to a routing device in the equipment room through the optical cable to transmit network information. Enables the software upgrade from a USB disk (supported in GBSS9.0). Tests the output clock signals by using a tester. Port for four E1/T1 signal inputs and outputs. The E1/T1 port provides surge protection of 250 A in both differential mode and common mode.

From 2010.1, the GTMU is replaced with the GTMUb. Figure 1-8 shows the GTMUb panel. Figure 1-8 GTMUb panel

The differences between the GTMUb and GTMU are as follows:

The GTMUb has stronger processing capabilities such as internal FPGA processing capability and Flash storage capability. There is a "GTMUb" silkscreen at the lower left corner of the GTMUb, and the CPRI port uses the six-in-one parallel mode. In addition, the EXT port is added (currently, the port is unavailable and its functions are to be determined). The GTMUb is used in GBSS8.1 and later versions. It inherits all software functions of the original board. In GBSS9.0 and later versions, the GTMUb also supports some functions that are not supported by the original board.

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CAUTION

The GTMU/GTMUb does not have an SDH port. If the optical transmission over SDH is required, it can be implemented by the GTMU/GTMUb that is connected to the external optical transmission equipment over the E1 port. Different from the 3G BBU, the BBU3900 performs signal processing in the RFU. Therefore, the BTS3900 GSM series does not implement baseband sharing. The FE port does not support half duplex. If the peer transmission equipment works in 10/100 Mbit/s half-duplex mode, it cannot be connected to the FE port on the GTMU/GTMUb. The FE electrical port supports 10/100 Mbit/s full duplex, and the FE optical port supports 100 Mbit/s full duplex.

The Universal Satellite Clock Unit (USCU) transmits the external clock information to the clock phase lock module of the GTMU, which then generates the system clock through the internal phase-locked loop, serving as the BTS clock source. The USCU is classified into three categories: USCUb0, USCUb1, and USCUb2, which are differentiated by the silkscreens at the lower left corner of the panel. The USCUb0, 0.5 U in height, is not configured with receivers. The USCUb1, 0.5 U in height, is configured with the GPS receiver. The USCUb2, 1 U in height, is configured with the GPS/GLONASS receivers. The USCUb is fixed in slot 1, and the USCUb2 with 1 U height occupies slots 0 and 1. Figure 1-9 USCU panel

Table 1-6 USCU description Port Name GPS RGPS TOD0 TOD1 M-1PPS BITS Description Receives GPS/GLONASS time and 1PPS pulse signals (GBSS8.1). Indicates the remote GPS port that is used for connection to the RGPS antenna system of competitors. Used for clock outputs by default (the port is unavailable in GBSS9.0). Used for clock inputs by default (the port is unavailable in GBSS9.0). Used for connection to the Metro-1000 equipment to obtain clock signals (the port is unavailable in GBSS9.0). Used for connection to the BITS clock equipment.

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TOD port: The port is used to transmit the information such as the time, clock source type, and clock source level. The port supports the standard 1PPS+TOD time output or input for the transmission equipment. By default, the TOD0 port is an output port and the TOD1 port is an input port. The input or output status of the port can be configured through the software.

CAUTIONGBSS8.1 C11 supports GPS clock and external reference clock inputs not clock synchronization in the entire network. GBSS9.0 supports clock synchronization in the entire network and can implement frame synchronization. UTRPb4: The UTRPb4, delivered with GBSS12.0, is configured when four E1s/T1s of the GTMU cannot meet the bandwidth requirement. The UTRPb4 supports TDM transmission not IP transmission. The UTRPb4 can work with the GTMU to provide eight E1/T1s. The UTRPb4 can be positioned in slot 0 or 4. Slot 4 is recommended. The UTRPb4 does not support the IP over E1 function.

CAUTION

There is also another interface board UBRI. One UBRI board provides six CPRI ports and is used when multi-mode RF modules are applied in a BTS working in GO mode and supports the macro BTS + DBS mode. For details, see section 2.2.10 "Macro BTS + DBS." The UBRI must be used in the preceding scenario because the dual-star topology must be applied for the CPRI connection of SDR modules.

UTRPc: As an expanded transmission board, the UTRPc is delivered in GBSS14.0. This board provides two FE/GE optical ports and four FE/GE electrical ports, supports a maximum of 2.5 Gbit/s forwarding capabilities. When ports for expanding transmission are required, the UTRPc needs to be installed.

CAUTIONThe GTMUa does not support the UTRPc.

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1.2.8 RF ModuleThe GSM 3900 series BTSs support two types of RF modules: RRU and RFU. The RRU and RFU integrate the duplex units, and therefore the output power of the TRX is also the TOC power. For multi-carrier modules, Huawei provides three hardware development platforms: V1, V2, and V3 platforms. The modules developed on different platforms have different duplex specifications and instantaneous transmit bandwidths. This section describes the RF modules one by one. The modules developed on different platforms are called the V1, V2, and V3 modules respectively. The GRFU V3 module has not been developed, that is, the GRFU V3 module with 1 x 80 W is not provided. If the large-power module or 2-TX module is required, you can use the MRFUe/MRFUd developed based on V3 platform for GSM only markets. The MRFUe is a 1T2R module, and the MRFUd is a 2T2R module. The RF modules of V3 platform to be used by the GSM network include RRU3929, RRU3926, RRU3942, RRU3922E, MRFUe, and MRFUd.

RRU Module TypesTable 1-7 DC RRU module types Module Name RRU3004 Module Type 900 MHz P25M 900 MHz E35M 1800 MHz full-band 75 MHz RRU3008 V1 900 MHz P25M 900 MHz CMCC medium 25 MHz 900 MHz E35M 900 MHz E25M low 25 MHz 850 MHz 25 MHz 1800 MHz high 45 MHz 1800 MHz low 45 MHz 1900 MHz high 40 MHz 1900 MHz low 40 MHz RRU3008 V2 900 MHz P25M 900 MHz CMCC medium 25 MHz 900 MHz E35M RRU3929 (developed on the V3 platform) 900 MHz E35M 900 MHz CMCC medium 25 MHz 900 MHz P25M 1800 MHz full-band 75 MHz 1800 MHz low 60 MHz (for China Mobile only) GBSS13.0 and later None GBSS12.0 and later GBSS9.0 and later GBSS8.1 and later None Support Version GBSS8.0 and later Support Version for Plug and Play None

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Module Name RRU3942

Module Type 1900 MHz 850 MHz

Support Version 1900 MHz modules support 2T2R in GBSS13.0 and later support 2T4R in GBSS14.0 and later. 850 MHz modules support 2T4R in GBSS14.0 and later.

Support Version for Plug and Play None

RRU3926

900 MHz P25M 900 MHz E35M 900 MHz CMCC medium 25 MHz 1800 MHz full-band 75 MHz 1800 MHz low 60 MHz (for China Mobile only)

GBSS14.0 and later

GBSS13.0 and later

RRU3922E

1800 MHz low 60M (for CMCC only)

GBSS14.0 and later

GBSS13.0 and later

NOTE

If the 850 MHz band in a project must use the V2 modules, you can use the RRU3908 V2 modules. The 850 MHz RRU3008 V2 modules are not provided. The RF module can work in GBSS N 1 version. For example, RRU3926 is delivered in GBSS14.0, and plug-and-play is supported in GBSS13.0.

Table 1-8 AC RRU module types Module Name RRU3004 Module Type 900 MHz P25M 900 MHz E35M 1800 MHz full-band 75 MHz GA GA completed Supported Version GBSS8.0

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Module Name RRU3008 V1

Module Type 900 MHz P25M 900 MHz CMCC medium 25 MHz 850 MHz 25 MHz 1800 MHz high 45 MHz 1800 MHz low 45 MHz 1900 MHz high 40 MHz 1900 MHz low 40 MHz

GA GA completed

Supported Version GBSS8.1

RRU3008 V2 V3 RRU

Unavailable at present The AC/DC power conversion module and DC RRU are separate modules. If required, the modules of all frequency bands can be provided. For details, see the subsequent sections.

/ The AC/DC power conversion module is expected to be GA in the second quarter of 2012.

/ GBSS14.0 (limited in GBSS13.0)

RFU Module TypesTable 1-9 RFU module types Module Name DRFU Module Type Supported Version GBSS8.0 and later Supported Version for Plug-and-Play None

900 MHz P25M 900 MHz E35M 1800 MHz full-band 75 MHz

GRFU V1

900 MHz P25M 900 MHz CMCC medium 25 MHz 900 MHz E35M 1800 MHz high 45 MHz 1800 MHz low 45 MHz 1900 MHz high 40 MHz 1900 MHz low 40 MHz

GBSS8.1 and later

None

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Module Name GRFU V2

Module Type

Supported Version GBSS9.0 and later

Supported Version for Plug-and-Play GBSS8.1 and later

900 MHz P25M 900 MHz CMCC medium 25 MHz 900 MHz E35M 1800 MHz high 60 MHz 1800 MHz low 60 MHz

GRFU V2a

900 MHz CMCC medium 25 MHz 1800 MHz low 45 MHz (for China Mobile only)

GBSS9.0 and later

GBSS8.1 and later

MRFUd (developed on the V3 platform) MRFUe (developed on the V3 platform)

900 MHz P25M 900 MHz E35M 1800 MHz full-band 75 MHz 900 MHz CMCC medium 25 MHz 900 MHz E35M 1800 MHz full-band 75 MHz 1800 MHz low 45 MHz (for China Mobile only)

GBSS13.0 and later

None

GBSS13.0 and later 900 MHz E35M module is used in GBSS14.0 and later.

None

NOTE

The modules customized for China Mobile also include the MRFU V2a, which support the same band as the GRFU V2a. The GRFU modules based on the V3 platform and multi-carrier RRUs are not developed. If a GSM project requires the V3 platform modules, you can use the MRFUd, MRFUe, RRU3929, RRU3926, and RRU3942 as the GO modules. If a GSM project requires the 850 MHz V2 modules, you can use the MRFU v2 and RRU3908 V2 850 MHz modules. Table 1-10 lists the bands supported by different modules.

Table 1-10 Bands supported by different modules Module Type 900 MHz P25 MHz 900 MHz E35 MHz 900 MHz CMCC medium 25 MHz 900 MHz E25M low 25 MHz 1800 MHz full-band 75 MHz Transmit Frequency Band 935 to 960 MHz 925 to 960 MHz 930 to 955 MHz 925 to 950 MHz 1805 to 1880 MHz Receive Frequency Band 890 to 915 MHz 880 to 915 MHz 885 to 910 MHz 880 to 905 MHz 1,710 to 1,785 MHz

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Module Type 1800 MHz high 45 MHz 1800 MHz low 45 MHz 1800 MHz low 60 MHz 1800 MHz high 60 MHz 850 MHz 25 MHz 1900 MHz high 40 MHz 1900 MHz low 40 MHz

Transmit Frequency Band 1835 to 1880 MHz 1805 to 1850 MHz 1805 to 1865 MHz 1820 to 1880 MHz 869 to 894 MHz 1950 to 1990 MHz 1930 to 1970 MHz

Receive Frequency Band 1740 to 1785 MHz 1710 to 1755 MHz 1710 to 1770 MHz 1725 to 1785 MHz 824 to 849 MHz 1870 to 1910 MHz 1850 to 1890 MHz

Comparison Between the Transmit, Receive, and Duplex Bandwidths of V1/V2/V3 ModulesTable 1-11 Comparison between the MRFUe/MRFUd and GRFU V1/V2 modules Item Capacity V1 A single module supporting 6 TRXs 15 MHz V2 A single module supporting 6 TRXs

MRFUe/MRFUd A single module supporting 8 TRXs MRFUd: 35 MHz + 35 MHz MRFUe: 35 MHz

Instantaneous Transmit Bandwidth

20 MHz 25 MHz (supported by only the 900 MHz P band and GRFU/MRFU V2a module in GBSS13.0)

Instantaneous Receive Bandwidth

25 MHz

The same as the bandwidth of the duplexer: 900 MHz: 25 MHz or 35 MHz 1800 MHz: 60 MHz

The same as the bandwidth of the duplexer: 900 MHz: 35 MHz 1800 MHz: 75 MHz 900 MHz: 35 MHz 1800 MHz: 75 MHz

Duplexer Bandwidth

900 MHz: 25 MHz 1800 MHz: 45 MHz

900 MHz: 25 MHz or 35 MHz 1800 MHz: 60 MHz

NOTE

For the GRFU V2 P 900 MHz module, the 25 MHz/1800 MHz low 45 MHz (dedicated for China Mobile only) in the GRFU/MRFU V2a 900 MHz CMCC supports the 25 MHz TX bandwidth in the GBSS9.0 and later versions.

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Table 1-12 Comparison between the RRU based on the V3 platform and RRU3008 V1/V2 modules Item Capacity Instantaneous Transmit Bandwidth V1 A single module supporting 8 TRXs 900 MHz: 12.5 MHz + 12.5 MHz 1800 MHz: 15 MHz + 15 MHz 25 MHz 900 MHz: 25 MHz or 35 MHz 900 MHz: 25 MHz or 35 MHz 900 MHz: 35 MHz 1800 MHz: 75 MHz 900 MHz: 35 MHz 1800 MHz: 75 MHz V2 A single module supporting 8 TRXs 20 MHz + 20 MHz V3 A single module supporting 8 TRXs 35 MHz + 35 MHz

Instantaneous Receive Bandwidth Duplexer Bandwidth

900 MHz: 25 MHz 1800 MHz: 45 MHz

CAUTIONThe RRU3008 V1 1800 MHz module is developed after the RRU3008 V1 900 MHz module and the RF port uses new hardware design module. Therefore, the instantaneous transmit bandwidth capacity of the RRU3008 V1 1800 MHz module is different from that of the RRU3008 V1 900 MHz module.

Relationship Between the RF Module Output Power and the AltitudeAll RF modules of Huawei can work normally in the area whose altitude is equal to or lower than 3500 m. In the area whose altitude is higher than 3500 m, the output power is reduced, as described in Table 1-13. Table 1-13 Relationship between the RF module output power and the altitude Altitude Output Power Degrading Value 0 to 3500 m 0 dB 3500 m to 4500 m 1 dB 4500 m to 6000 m 2 dB

1.2.9 Multi-carrier ModuleThe following description takes the GRFU V2 module as an example.

Multi-carrier StandardThe European Telecommunications Standards Institute (ETSI) has accepted the GSM multi-carrier RF standard formulated by the 3GPP, and issued the formal EN 301 502 V9.2.1 standard. Therefore, the GSM multi-carrier RF module has only one type of power

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specification, that is, the power specification (corresponding to the original Class 2 specification) compliant with the EN 301 502 V9.2.1 standard. The original Class 0 (ETSI) power specification is not used any more.

Restrictions on ARFCNs Due to Limited Duplexer BandwidthTake the GRFU V2 module as an example. The GRFU V1 and GRRU V1/V2 are similar to the BTS3900E multi-carrier module. For the V3 module with a full-band duplexer, the frequency restriction described here is not applicable. Figure 1-10 ARFCNs covered by the 1800 MHz low 60 MHz moduleARFCN 512 ARFCN 810 ARFCN 811

100k

100k

100k

100k

100k

100k

100k

100k

100k

100k

1805MHz

1805.2MHz

1864.8MHz

1865MHz

60M

As shown in the preceding figure, the modulation width of each GSM frequency is 200 KHz. The central frequency of ARFCN 811 is 1865 MHz, but the actual bandwidth exceeds the 60 MHz range of the duplexer. Therefore, for the 1800 MHz low 60 MHz module, the supported ARFCNs are 512 to 810. The difference between the maximum frequency and minimum frequency is 59.6 MHz. Likewise, the similar problems exist in the 1900 MHz module, EGSM low 25 MHz module, and CMCC-specific module. Table 1-14 lists available ARFCNs of the GRFU V2. Table 1-14 Available ARFCNs of the GRFU V2 Module Name 1800 MHz low 60 MHz Declared Frequency Band TX: 1805 to 1865 MHz RX: 1710 to 1770 MHz 1800 MHz high 60 MHz TX: 1820 to 1880 MHz RX: 1725 to 1785 MHz 900 MHz low 25 MHz EGSM GRFU CMCC-specific 25 MHz TX: 925 to 950 MHz RX: 880 to 905 MHz TX: 930 to 955 MHz RX: 885 to 910 MHz 099 10001023 TX: 930.2 to 954.8 MHz RX: 885.2 to 909.8 MHz 24.6 MHz 074 9751023 TX: 925.2 to 949.8 MHz RX: 880.2 to 904.8 MHz 24.6 MHz 587885 TX: 1820.2 to 1879.8 MHz RX: 1725.2 to 1784.8 MHz 59.6 MHz Available ARFCNs 512810 Frequency Band Corresponding to Available ARFCNs TX: 1805.2 to 1864.8 MHz RX: 1710.2 to 1769.8 MHz Maximum Frequency Difference 59.6 MHz

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Module Name 900 MHz PGSM 25 MHz 900 MHz EGSM 35 MHz

Declared Frequency Band TX: 935 to 960 MHz RX: 890 to 915 MHz TX: 925 to 960 MHz RX: 880 to 915 MHz

Available ARFCNs 1124

Frequency Band Corresponding to Available ARFCNs TX: 935.2 to 959.8 MHz RX: 890.2 to 914.8 MHz

Maximum Frequency Difference 24.6 MHz

0124 9751023

TX: 925.2 to 959.8 MHz RX: 880.2 to 914.8 MHz

34.6 MHz

NOTE

The following ARFCNs seem to be within the declared frequency band. The ARFCNs, however, cannot be configured and they may be misused.

The 1800 MHz ARFCN 736 (TX-1850, RX-1755) cannot be configured for the low 45 MHz GRFU, and the high 45 MHz GRFU supports the frequency. The 1800 MHz ARFCN 661 (TX-1835, RX-1740) cannot be configured for the high 45 MHz GRFU, and the low 45 MHz GRFU supports the frequency. The 900 MHz ARFCN 75 (TX-950, RX-905) cannot be configured for the low 25 MHz EGSM GRFU. The 900 MHz ARFCN 999 (TX-930, RX-885) and ARFCN 100 (TX-955, RX-910) cannot be configured for the CMCC-specific module.

Restrictions on the Multi-carrier Module BandwidthThe GRFU and GRRU are multi-carrier modules, and their functions are restricted by the hardware processing capability. Therefore, instantaneous bandwidth limitation occurs in all the multi-carrier modules. In other words, all the multi-carrier modules share the limitation of 20 MHz of instantaneous bandwidth at the TX channel and 25 MHz of instantaneous bandwidth at the RX channel (taking GRFU V2 as an example). Therefore, the 20 MHz at the TX channel and the 25 MHz at the RX channel are both treated as a frequency band window. The GRFU at a certain frequency band window can work freely within the range. Therefore, the configuration of the GRFU has to follow the following restrictions after considering the impact of the work bandwidth and the instantaneous bandwidth at the TX and RX channels.

If the spacing between any two frequencies within one cell does not exceed 20 MHz, only one GRFU has to be configured in the cell if the TOC of the GRFU meets the requirement of the BTS. If not, two GRFUs can be configured to increase the output power For the RRU3008, it has two TX channels. Therefore, the two channels support the frequency range of 20 MHz + 20 MHz. If the TOC does not meet the requirement, you can configure two RRU3008s + double antenna to meet the requirement.

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CAUTIONIf the frequency is allocated at the edges of the 15 M sliding window, the intermodulation specifications of the GRFU deteriorate. The intermodulation specifications, however, still comply with the protocol requirements. The receiver sensitivity of the frequencies at two ends of the duplexer is worse than that of the frequencies in the center.

If the spacing between any two frequencies of a cell exceeds 20 MHz, you must first try to adjust the spacing to make it less than 15 MHz. If the spacing cannot be adjusted, two GRFUs must be configured. Check whether the two GRFUs configured in the cell satisfies the network requirements from the following aspects:

Module selection The two GRFUs must be of the same type. In other words, different types of GRFU cannot be configured in the same cell.

Frequency and TRX assignment If the spacing between any two frequencies in a cell exceeds 20 MHz, these frequencies should be divided into two groups based on the following principle: The spacing between any two frequencies of each group cannot exceed 20 MHz. In this way, the two GRFUs can carry these two groups of frequencies respectively. If the frequencies cannot be divided into two groups with spacing less than 20 MHz, this cell must adopt the configuration of double antenna + 3 GRFUs or 4 GRFUs. Generally, you are advised to allocate the number of TRXs evenly in the two GRFUs, such as in the S8 configurations, the TRXs are 4+4 in the two GRFUs. In S7 configuration, the TRXs are 3+4 in the two GRFUs, which is caused by the restriction of the bandwidth. Therefore, in S8 configuration, the 3+5, even the 2+6 configurations are also supported. The 1+7 configuration, however, is not supported because one GRFU supports a maximum of six frequencies. In this scenario, the cell has to adopt the double-antenna+3 GRFUs or 4 GRFUs.

TOC power When two GRFUs are configured in one cell, check whether the TOC power of the cell satisfies the frequency planning requirements. If not, more GRFUs shall be added to promote the output power. In this case, the cell should adopt the double antenna+3GRFUs or 4 GRFUs configuration.

NOTE

The GRFUs have to adopt the same output power no matter how many GRFUs are configured. For example, two GRFUs are configured in S7 scenario, which carries three and four TRXs respectively. Then, the output power for the GRFU carrying three TRXs shall be adjusted so that its output power is the same as that of the GRFU carrying four TRXs.

FH mode Non-FH scenario If there is no FH in the cell and the frequency spacing within each GRFU does not exceed 20 MHz, this cell is functional. Figure 1-11 shows the bandwidth limit for the two GRFUs configured per cell in the non-FH scenario.

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Figure 1-11 Bandwidth limit for the two GRFUs configured per cell in the non-FH scenario20M 15M 25M 900 MHz/850 MHz module 20M 20M 35M 900 MHz full band of EGSM 20M 20M 60M 1800 MHz module

NOTE

The two 20 MHz panes refer to the frequency assembly of each GRFU. The 25 MHz, 35 MHz, and 60 MHz panes represent the working bandwidths of the existing GRFUs.

Baseband FH scenario

If the baseband FH mode is adopted in the cell, the spacing between any two frequencies within each GRFU frequency assembly cannot exceed 20 MHz; and the spacing between any two frequencies within the frequency assembly composed of the frequencies of the two GRFUs cannot exceed 25 MHz. Figure 1-12 shows the bandwidth limit for the two GRFUs configured per cell in the baseband FH scenario. Figure 1-12 Bandwidth limit for the two GRFUs configured per cell in the baseband FH scenario20M 20M 25M 25M 900 MHz/850 MHz module 20M 20M 25M 35M900 MHz fullEGSM

20M 20M 25M 60M1800 MHz module

NOTE

The orange 25 MHz pane represents that the baseband reaches the 25 MHz instantaneous limitation in the RX channel during the FH. The meanings of the rest panes are the same as in Figure 1-12.

RF FH scenario When the inter-GRFU RF FH is disabled and the bandwidth of a cell exceeds 15 MHz, one MA group cannot implement the RF FH. In this case, you can set two MA groups with the bandwidth of each group not exceeding 20 MHz to implement the RF FH. If there is RF FH in the cell, the spacing between any two frequencies within the frequency set of the two GRFUs cannot exceed 20 MHz. Figure 1-13 shows the bandwidth limit for the two GRFUs configured per cell in the RF FH scenario (one FH sequence group).

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Figure 1-13 Bandwidth limit for the two GRFUs configured per cell in the RF FH scenario (one FH sequence group)15M 15M 25M900 MHz/850 MHz module

15M 15M 35M900 MHz fullEGSM

15M 15M 60M1800 MHz module

CAUTIONFor the bandwidth limit for the two GRFUs configured per cell in RF FH scenario (one FH sequence group), the inter-module RF hopping function is provided in GBSS9.0. For details on the function, see the following descriptions.

Restrictions on Frequencies due to Limited GRFU Instantaneous BandwidthFor the GRFU, the TX bandwidth is limited to 20 MHz and the RX bandwidth is limited to 25 MHz. The restrictions on frequencies are similar to those due to the limited duplexer bandwidth, that is, the maximum spacing between internal frequencies is not 20 MHz/25 MHz. Therefore, the difference between the maximum available frequency and minimum available frequency in the frequency set is 18.8 MHz (actual bandwidths of ARFCNs 1 to 75) instead of 20 MHz, as shown in the following figure. Figure 1-14 Actual instantaneous bandwidth of the GRFU

Likewise, the difference between the maximum available frequency and minimum available frequency in the frequency set with the RX bandwidth limited is 24.8 MHz instead of 25 MHz.

Static Output Power, Dynamic Output Power, and Power Sharing FunctionFor details, see the Guide to the Power Sharing Function available at http://3ms.huawei.com.

Use Guide to the Power Sharing Function

Use strategy for power sharing The dynamic power is based on the power multiplexing algorithm. When the dynamic power is used, the maximum transmit power of the TRX can be configured as a value greater than the average available power per TRX. That is, the power multiplexing algorithm can bring coverage gains. The power multiplexing algorithm, however, cannot

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completely prevent the power amplifier from being overloaded. Whether the dynamic power can be used depends on the network environment. The influence factors include the traffic volume per channel, distance between sites, and frequency reuse. The network planning managers at the frontline can determine whether the dynamic power specifications are used by some assistance tools. Note:

If the power sharing function is enabled in some areas where power sharing is inapplicable, the negative impact is made on the voice quality (two many intra-cell handovers affect voice quality and user experience), CS service performance (call setup success rate, congestion rate, call drop rate, number of attempted handovers, and handover success rate), and PS service performance (traffic, retransmission rate, and call drop rate). The impact is related to network configurations (traffic distribution, PDCH/SDCCH configuration proportion, and frequency reuse). If the power sharing function is enabled in areas where power sharing is applicable and the number of users increases, the preceding problem may also occur. In project competition and bid reply, if the static power can meet network requirements, modules are preferentially considered to be added.

Requirements for power sharing Before enabling the power sharing function, you must enable DTX and power control.

The power sharing function cannot be used together with the concentric cell, co-BCCH, tight BCCH frequency reuse, and enhanced measurement report in GBSS8.1. It is compatible with such functions in GBSS9.0. The power sharing function cannot work with the IBCA, dynamic MAIO, RAN-sharing, and dual-timeslot cell in GBSS8.1 and GBSS9.0 for reasons described as follows: IBCA: The IBCA function performs channel allocation based on the quality, and the power sharing function performs channel allocation based on the required power. When the two functions are used at the same time, it is difficult to consider both the power and quality for channel allocation. Therefore, the IBCA function should not be used with the power sharing function. Dynamic MAIO: The cause is similar to that of the IBCA function. RAN sharing: Multiple mobile operators share an RAN. Some uncertain factors, however, exist in RAN sharing, for example, whether the resources between mobile operators can be shared and the sharing mode is not determined. Therefore, the RAN sharing function cannot be used with the power sharing function.

Use of Power Sharing Function

In publicity, multi-carrier modules have two types of specifications: static power (power sharing disabled) and dynamic power (power sharing enabled). The power sharing technology affects the network quality. Therefore, in new or swapped BTS projects, the network planning and BTS quotation require that multi-carrier modules adopt static power for module settings. If static power cannot meet the requirement, you can consider adding modules to improve the power. If the operation is not successful, you can consider using the power sharing function to improve the power. If dynamic power is required (power sharing enabled) for performing the network planning and BTS quotation, you need to describe to the customer the application scenarios of dynamic power sharing function and the impacts to the KPIs and network quality. In addition, the power sharing function must be sold in the mode of Software function + Service. The function is to be added in GBSS13.0.

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The solution guides do not provide the RF counters such as the TX Power and RX Sensitivity of the modules. Only the TX power of a 2T2R module working in single-TX mode is provided. For details, see the GSM Product Specification. This document mainly describes the specific specifications and solutions in the GSM scenario.

1.2.10 DRFUFunctions of the DRFUThe DRFU is a double radio filter unit that can be used for the BTS3900/BTS3900A. The DRFU performs modulation and demodulation between baseband signals and RF signals, processes data, and combines and divides signals. The DRFU contains a combiner and supports three transmit modes: independency, combining, and PBT. A single antenna system supports a maximum of S4 configuration. In addition, the DRFU supports the TX diversity and 4-way RX diversity. The DRFU reserves the license items for the TRX, PBT, TX diversity, and 4-way RX diversity. The customer can acquire the license for one TRX by purchasing one DRFU. If other TRXs are required, the customer needs to purchase additional one license. Similar to the DTRU, the capacity of the DRFU reduces by half when the PBT, TX diversity, and 4-way RX diversity are used. For details on the DRFU, see the BTS3900 Sales Guide.

Precautions for the DRFU

If all frequencies are within the PGSM band, the field engineers must prefer the PGSM DRFU. The PGSM DRFU is mandatory for the application of the GSM+CDMA co-site because the EGSM DRFU is subject to be interfered by the CDMA site signals. The DRFU is classified into new DRFU and old DRFU.

Compared with the old 900 MHz DRFU, the new 900 MHz DRFU has the same RF specifications but different appearance. The PCN has been released, and the replacement has been complete. Compared with the old 1800 MHz DRFU, the new 1800 MHz DRFU has the same RF specifications but different appearance. The PCN is to be released, and the replacement time is to be determined.

The Frequency Domain Reflectometer (FDR) added to the new DRFU is not promoted at the market. Therefore, no PCN about this change is released. For customers who are promised to be provided with the FDR, the marketing personnel need to communicate with the market representative for solutions. If this function is already promoted to a customer and the customer intends to explore more about it, the marketing personnel can clarify the reason: the detection accuracy of the FDR cannot reach an expected result. For details, see the GSM&UMTS&LTE Marketing Execution Dept Doc (2009) No.015 Notice on the EOM of FDR in the GBSS9.0 released at http://3ms.huawei.com.

CAUTIONThe output power of the DRFU 1800 MHz is 18 W. To raise competitive strength of the DRFU in Indian market, the output power is increased to 20 W in combining mode.

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1.2.11 GRFU V1/V2Structure of the GRFUThe GRFU is a multi-carrier RF module, and has the same functions as the DRFU. The GRFU also integrates duplexer, but it adopts multi-carrier RF design, which means the following: The GRFU uses one RF channel to transmit the signals of a maximum of six TRXs through the digital IF technology and the six TRXs can share the output power. The GRFU has two RX channels. For details on the internal structure of the GRFU, see the BTS3900 GSM Technical Description released at http://support.huawei.com.

CAUTION

The output power of GRFU V1 version in S1 mode is modified from 80 W to 60 W. Do not publicize the output power of 80 W to customers. The GBSS8.1 version software supports only the output power of 60 W. When using the power sharing function, you need to enable the functions such as DTX, third-generation power control, and intra-cell handover. The GRFU does not support the TX diversity and 4-way RX diversity.

Power Specifications of the GRFU V1 Dual-PA Power Sharing FunctionFor large-configuration scenarios (two GRFUs), the dual-PA power sharing is developed in GBSS9.0 to improve the output power. The dual-PA power sharing can be implemented for 912 TRXs. Table 1-15 Output power specifications after the dual-PA power sharing Operating Output Power When Configuration Output Power When Single-PA Frequency Band Power Sharing Is Enabled (GMSK) Dual-PA Power Sharing Is Enabled (GMSK) PGSM 900 MHz EGSM 900 MHz GSM 1800 MHz GSM 1900 MHz S11 S12 16 W 16 W 20 W 20 W S9 S10 20 W 20 W 25 W 25 W

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Power Specifications of the GRFU V2 Dual-PA Power Sharing FunctionTable 1-16 Output power specifications after the dual-PA power sharing Operating Frequency Band PGSM 900 MHz EGSM 900 MHz GSM 1800 MHz GSM 1900 MHz S11 S12 20 W 20 W 25 W 25 W Configuration Output Power When Single-PA Power Sharing Is Enabled (GMSK) 20 W 20 W Output Power When Dual-PA Power Sharing Is Enabled (GMSK) 25 W 25 W

S9 S10

Dual-PA power sharing cannot be used simultaneously with the intelligent shutdown of the TRX, RAN-sharing, concentric cell, IBCA, dynamic MAIO, dual-timeslot cell, co-BCCH, and inter-GRFU RF FH. The dual-PA power sharing function is used in the following scenarios:

Two GRFUs are configured per cell. The TRX frequencies on two PAs of the GRFU are within the same instantaneous TX bandwidth range. The dual-PA power sharing applies to scenarios with large capacity and high power, especially at swapped sites with cavity combiners.

CAUTION

The output power when dual-PA power sharing is enabled in S11 and S12 configurations is controlled by software parameters and is used in areas where altitude is lower than 3000 m. If a multi-mode module works in UMTS or LTE mode, the dual-PA power sharing function needs to be disabled because the frequency bands of both PAs have been configured in the same range of instantaneous transmit bandwidth. If TRXs in UMTS or LTE mode are configured, the GSM network cannot obtain the frequencies configured in UMTS or LTE mode, causing inconsistency between the bandwidths of both PAs. Therefore, the dual-PA power sharing function is ineffective automatically in dual-mode.

1.2.12 MRFUdOne cell only supports two GRFU modules enabling the Power Sharing Between Boards function in the same frequency band. Using a 900 MHz/1800 MHz CoBCCH cell as an example, if a 900 MHz module enables the Power Sharing Between Boards function, the cell can support a maximum of two such modules without restrictions for 1800 MHz modules.

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Table 1-17 Output power specifications of the MRFUd in 1-TX mode Operating Frequency Band Configuration Static Output in 1-TX Mode (GMSK) 900 MHz PGSM 25 MHz 900 MHz EGSM 35 MHz 1800 MHz full-band 75 MHz S1 S2 S3 S4 S5 S6 S7 S8 80 W 40 W 27 W 20 W 16 W 12 W N/A N/A Dynamic Output in 1-TX Mode (GMSK) 80 W 40 W 30 W 27 W 20 W 20 W N/A N/A

1.2.13 MRFUeFrom GBSS14.0, the 900 MHz MRFUe board configured with a single TRX supports 125 W output power but the 1800 MHz MRFUe does not. In GBSS13.0, the 125 W output power dedicated for CMCC market is implemented by setting software parameters.

1.2.14 RRU3004Functions of the RRU3004The RRU3004 (also called DRRU) and RRU3008 form RF units of the DBS3900. For details on the internal structure, see the DBS3900 Technical Description.

CAUTIONThe RRU3004 also supports 900 MHz TOC non-combined 12 W specification (the independent power template is used and is not implemented through power degrading). The specification is used in the areas with low power consumption or with solar power supply. The RRU3004 has a built-in duplexer, and the output power is the TOC. The structure of the RRU3004 is similar to that of the DRFU. The DRFU has four (or two pairs) interconnection ports of the RF signals, while the RRU3004 has only two (or one pair) interconnection ports of the RF signals. The differences between them are as follows:

The DRFU supports 4-way RX diversity, while the RRU3004 does not support. When a cell is configured with two RF modules, four interconnection ports of the DRFU ensure that two TRXs in one module can obtain RX diversity signals from the other module. For

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the RRU3004, however, only one TRX in one module can obtain RX diversity signals from the other module.

For the S3/3 configuration, four RRU3004s or three DRFUs are required. Two TRXs of the DRFU have one RX diversity port respectively, and a single module supports inter-cell operation. The RRU3004 has only one pair of interconnection ports of the RF signals. If inter-cell operation is performed for a single module, the RX diversity interconnection of each cell cannot be ensured. In indoor coverage scenarios, a single antenna is generally configured (no RX diversity) and the DBS3900 is installed easily. Therefore, for the S1/1 configuration, the RRU3004 is recommended. In addition, only one RRU3004 is used in the S1/1 configuration (no RX diversity) according to the restriction on the BSC.

1.2.15 RRU3008 V1/V2Functions of the RRU3008The RRU3008 is the multi-carrier RF module of the DBS3900. For details on the internal structure of the RRU3008, see the DBS3900 Technical Description.

1-TX and 2-TX Modes of the RRU3008Different from the GRFU, the RRU3008 has two TX/RX duplex RF channels (called 2-TX mode). That is, a single module has two multi-carrier power amplifiers. According to the use of RF channels, the RRU3008 can work in 1-TX or 2-TX mode. Generally, the 2-TX mode is preferred.

When the RRU3008 works in 2-TX mode, each channel supports a maximum of four TRXs. In other words, the RRU3008 supports a maximum of eight TRXs. In 2-TX mode, only one module can be configured in single-antenna scenarios and the maximum configuration of a cell is S8. In 1-TX mode, the RRU3008 supports a maximum of six TRXs. In this case, two modules can be configured in single-antenna scenarios and the maximum configuration of a cell is S12. Only two modules of the same band can be used in the same cell. In 1-TX mode, data is transmitted over channel A. Channel B is only used for data receiving.

The RRU3008 in 2-TX mode supports inter-cell configuration. When the RRU3008s are configured in different cells, the diversity receiving signals are unavailable. Therefore, inter-cell configuration of the RRU3008s is used in indoor coverage scenarios. Considering the impacts of the working bandwidth and instantaneous TX/RX bandwidth, the restrictions on the RRU3008 (take the 900 MHz RRU3008 as an example) are as follows: A. If the spacing between any two frequencies of a cell does not exceed 20 MHz + 20 MHz and the TOC power of the RRU3008 meets the requirement of the BTS, one RRU3008 (2-TX) can be configured in the cell. If the TOC power of the RRU3008 does not meet the requirement of the BTS, two RRU3008s (1-TX) can be configured to increase the output power.

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B. If the spacing between any two frequencies of a cell exceeds 20 MHz, you must first try to adjust the spacing to make it less than 20 MHz. If the spacing cannot be adjusted, you need to check whether two RRU3008s can be configured in the following aspects:

20 MHz frequency set of a cell 25 MHz

If there is no FH in a cell or the baseband FH is used, two frequency sets can be divided and allocated to two power amplifiers (TX channels) to ensure that the TX frequency of each power amplifier meets the 20 MHz requirement. If the RF FH is used in a cell, two FH groups must be divided and allocated to two power amplifiers, and each FH group cannot exceed the 20 MHz limitation.

25 MHz frequency set of a cell. Two antenna systems and two RRU3008s (2-TX) must be configured regardless of the FH mode. In this case, two FH groups are divided and allocated to two RRU3008s respectively. Considering high cost of the RRU3008, if two RRU3008s are required in a cell, the macro BTS is recommended unless the installation on the tower is required.

Available ARFCNs of the Instantaneous Bandwidth of the RRU3008For the RRU3008, the restrictions on available ARFCNs of the instantaneous bandwidth are as follows:

For the 900 MHz RRU3008 V1, the difference between the maximum available frequency and minimum available frequency in the frequency set with the TX bandwidth limited is 12.2 MHz instead of 12.5 MHz. For the 900 MHz RRU3008 V2, the difference between the maximum available frequency and minimum available frequency in the frequency set with the TX bandwidth limited is 18.8 MHz instead of 20 MHz. For the 1800 MHz RRU3008 V1, the difference between the maximum available frequency and minimum available frequency in the frequency set is 14.8 MHz instead of 15 MHz. For any module, the difference between the maximum available frequency and minimum available frequency in the frequency set with the RX bandwidth limited is 24.8 MHz instead of 25 MHz.

CAUTION

If the frequency is allocated at the edges of the 12.5 MHz/15 MHz/20 MHz sliding window, the intermodulation specifications of the RRU3008 deteriorate. The intermodulation specifications, however, still comply with the protocol requirements. The receiver sensitivity of the frequencies at two ends of the duplexer is worse than that of the frequencies in the center. The output power as shown in the specification requires that the TRXs are evenly distributed on the two channels. For example, S5 = S2 + S3. If the project requires S5 = S1 + S4 due to the restriction of frequency range, the S5 output power must be configured based on the S7 output power. For details, contact the pre-sales network planning and optimization engineers.

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Output power specifications of the RRU3008 V1/V2 in 1-TX modeTable 1-18 Output power specifications of the RRU3008 V1 in 1-TX mode Operating Frequency Band Configuration Static Output in 1-TX Mode (GMSK) 850 MHz PGSM 900 MHz EGSM 900 MHz Low 25 MHz CMCC 1800 MHz 1900 MHz S1 S2 S3 S4 S5 S6 S7 S8 40 W 20 W 13 W 10 W 7.5 W 6W N/A N/A Dynamic Output in 1-TX Mode (GMSK) 40 W 20 W 15 W 12 W 10 W 9.5 W N/A N/A

Table 1-19 Output power specifications of the RRU3008 V2 in 1-TX mode Operating Frequency Band PGSM 900 MHz EGSM 900 MHz CMCC Configuration Static Output in 1-TX Mode (GMSK) S1 S2 S3 S4 S5 S6 S7 S8 40 W 20 W 13 W 10 W 7.5 W 6W N/A N/A Dynamic Output in 1-TX Mode (GMSK) 40 W 20 W 15 W 12 W 10 W 9.5 W N/A N/A

RRU3008 V1/V2 Dual-PA Power SharingIn GBSS9.0, the RRU3008 supports dual-PA power sharing. When this function is enabled, two power amplifiers are managed as a unified power resource pool. The dual-PA power sharing function can be used only when the total number of TRXs is set to 58. Table 1-20 lists the output power specifications of RRU3008 V1/V2 when dual-PA power sharing is enabled.

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Table 1-20 Output power specifications of RRU3008 V1/V2 when dual-PA power sharing is enabled Configuration S5 S6 S7 S8 Output Power When Dual-PA Power Sharing Is Enabled (GMSK) 15 W 15 W 10 W 10 W

Dual-PA power sharing cannot be used simultaneously with the intelligent shutdown of the TRX, RAN-sharing, concentric cell, IBCA, dynamic MAIO, dual-timeslot cell, co-BCCH, and inter-GRFU RF FH (supported by the GRFU rather than the RRU3008). The dual-PA power sharing function is used in the following scenarios:

Documents

Guide to GSM 3900 Series BTSs Solution in 2012 V1.2