zxsdr bs8900 gu360 (outdoor gsm&umts dual mode macro node b) system description
TRANSCRIPT
ZXSDR BS8900 GU360Outdoor GSM&UMTS Dual Mode Macro Node B
System Description
Version 4.00.10
ZTE CORPORATIONZTE Plaza, Keji Road South,Hi-Tech Industrial Park,Nanshan District, Shenzhen,P. R. China518057Tel: (86) 755 26771900Fax: (86) 755 26770801URL: http://ensupport.zte.com.cnE-mail: [email protected]
LEGAL INFORMATION
Copyright © 2006 ZTE CORPORATION.
The contents of this document are protected by copyright laws and international treaties. Any reproduction or distribution ofthis document or any portion of this document, in any form by any means, without the prior written consent of ZTE CORPO-RATION is prohibited. Additionally, the contents of this document are protected by contractual confidentiality obligations.
All company, brand and product names are trade or service marks, or registered trade or service marks, of ZTE CORPORATIONor of their respective owners.
This document is provided “as is”, and all express, implied, or statutory warranties, representations or conditions are dis-claimed, including without limitation any implied warranty of merchantability, fitness for a particular purpose, title or non-in-fringement. ZTE CORPORATION and its licensors shall not be liable for damages resulting from the use of or reliance on theinformation contained herein.
ZTE CORPORATION or its licensors may have current or pending intellectual property rights or applications covering the subjectmatter of this document. Except as expressly provided in any written license between ZTE CORPORATION and its licensee,the user of this document shall not acquire any license to the subject matter herein.
ZTE CORPORATION reserves the right to upgrade or make technical change to this product without further notice.
Users may visit ZTE technical support website http://ensupport.zte.com.cn to inquire related information.
The ultimate right to interpret this product resides in ZTE CORPORATION.
Revision History
Revision No. Revision Date Revision Reason
R1.0 20090925 First edition
Serial Number: sjzl20095500
Content
About This Manual.............................................. i
Overview...........................................................1System Background ........................................................ 1
System Position in Network.............................................. 2
Cabinet Appearance ........................................................ 2
System Features ............................................................ 8
Services and Functions...................................................10
Indices ............................................................15System Capacity ...........................................................15
Working Frequency Bands...............................................15
Cabinet Indices .............................................................16
Power Supply Requirement .............................................16
Power Consumption .......................................................17
RF Output Power ...........................................................18
Static Receiving Sensitivity .............................................19
Environment Requirement ..............................................19
Reliability .....................................................................19
EMC.............................................................................20
Transmission Capacity ....................................................20
Lightning Protection Levels .............................................21
Dry Contact Capacity .....................................................21
System Structure ............................................23Hardware Structure .......................................................23
Hardware Composition ...............................................23
Cabinet Layout..........................................................24
Power Supply Subsystem............................................31
BBU Subsystem.........................................................31
RF Subsystem...........................................................32
Fan Monitoring Subsystem ..........................................33
Software Structure ........................................................33
Interfaces and Protocols .................................35
Overview......................................................................35
Abis interface............................................................36
Um Interface ............................................................38
Iub Interface.............................................................39
Uu interface..............................................................42
Physical Interfaces.........................................................42
Working Principles ..........................................45System Working Principles ..............................................45
Signal Flow...................................................................47
System Service Signal Flow ........................................47
System Control Signal Flow.........................................48
System Clock Signal Flow ..........................................49
Power Distribution .........................................................49
Cabinet Heat Dissipation.................................................50
Cabinet Waterproof Handling...........................................51
System Maintenance .......................................53Maintenance Overview ...................................................53
Maintenance Functions ...................................................54
Networking .....................................................55Star Networking ............................................................55
Chain Networking ..........................................................56
Ring Networking............................................................56
Configuration ..................................................57Configuration Principles ..................................................57
GSM Single Mode Configuration .......................................59
UMTS Single Mode Configuration .....................................61
GSM/UMTS Dual Mode Configuration ................................64
Typical Configurations(RU60) ..........................................67
Reliability ........................................................75Hardware Reliability .......................................................75
Software Reliability ........................................................76
Standards Followed.........................................79Communication Standards ..............................................79
Figures ............................................................81
Tables .............................................................83
List of Glossary................................................85
About This Manual
Purpose This manual describes the system architecture, working princi-ple, technical indices, and networking and configurations of ZXSDRBS8900 GU360 Outdoor GSM&UMTS Dual Mode Macro Node B sys-tem.
IntendedAudience
� System Engineer
� Planning Engineer
What Is in ThisManual
This manual contains the following chapters.
Section Summary
Chapter 1, Overview Introduces BS8900 systembackground, features, function,appearance, and its position innetwork
Chapter 2, Indices Describes BS8900 indices,including physical indices,power indices, environmentrequirement, reliability indices,receiving sensitivity, and capacityindices.
Chapter 3, System Structure Describes BS8900 hardwarestructure and software structure
Chapter 4, Interfaces andProtocols
Describes BS8900 physicalinterface and protocol interfaces
Chapter 5, Working Principles Describes the working principlesof BS8900 software and hardware
Chapter 6, System Maintenance Describes BS8900 maintenancemethods
Chapter 7, Networking Describes BS8900 networkingmodes
Chapter 8, Configuration Describes typical configurations indifferent systems
Chapter 9, Reliability Describes BS8900 software andhardware reliability
Chapter 10, Standards Followed Introduces the communicationstandards that BS8900 complieswith
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ZXSDR BS8900 GU360 System Description
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C h a p t e r 1
Overview
Table of ContentsSystem Background ............................................................ 1System Position in Network.................................................. 2Cabinet Appearance............................................................ 2System Features ................................................................ 8Services and Functions.......................................................10
System BackgroundZTE SDR serial BTS is a new wireless product family designed andproduced by ZTE. It employs the advanced SDR technology. Thehardware architecture is based on the integrated μTCA platform,a breakthrough platform supporting all the current radio accessmodes including GSM, UMTS, CDMA2000, and WiMAX. In addition,it can smoothly evolve to Enhanced EDGE/LTE.
BS8900 is a dual-mode outdoor macro base station, supportingboth GSM (850MHz/900MHz/1800MHz/1900MHz) and UMTS(850MHz/900MHz/1800MHz/1900MHz/2.1GHz) . It can indepen-dently function as a GSM macro base station or a UMTS macrobase station. It also supports the soft base station on somefrequency bands (850MHz/900MHz/1800MHz/1900MHz ).
BS8900 dual-mode base station is based on the architecture thatbaseband and RF are separated. The baseband unit is designedon the basis of μTCA platform. The RF unit can use RU60, RSU60,RU02, or RU40 to meet flexible site type configuration.
� RU60/RSU60: based on broadband transceiver and multi-car-rier amplifier, supports both GSM and UMTS. Where, the RFpower of RSU60 is higher.
� RU02: dual-density RF unit, supports multiple GSM RF tech-nologies and meets the requirement on the configuration ofsites with small capacity.
� RU40: single-mode multi-carrier RF unit, supports UMTS.
BS8900 provides a new solution for GSM/UMTS mixed networkingand network evolvement. It can be widely used in outdoor envi-ronment, such as heavy-traffic urban areas, urban areas, suburbs,and road coverage, to meet various coverage requirements. More-over, it can reduce the cost for network construction and operation.
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ZXSDR BS8900 GU360 System Description
System Position in NetworkGSM/EDGE/UMTS system is composed of BTS/Node B, BSC/RNC,CN and MS/UE, as shown in Figure 1.
FIGURE 1 POSITION OF BS8900 IN GSM/EDGE/UMTS SYSTEM
BS8900 performs BTS/Node B functions. It and BSC/RNC consti-tute BSS.
Cabinet AppearanceBS8900 can configure the following cabinet types:
� Site support cabinet BC8910: used to accommodate powersystem, baseband pool unit, heat exchanger, and transmissiondevice.
� Outdoor RF cabinet RC8910: used to accommodate RF unit.
� Outdoor RF cabinet RC8911: used to accommodate RF unitand battery.
� Outdoor RF cabinet RC8931: used to accommodate RF unitand battery.
� Battery cabinet PC8910: used to accommodate battery.
Among the cabinets, BC8910, RC8910, RC8911, and PC8910 havethe same appearance and dimensions, and RC8931 is a high sidecabinet, as shown in .
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Chapter 1 Overview
FIGURE 2 CABINET APPEARANCE
1. RC89312. BC8910
3. RC8911
� Maximum dimension of BC8910, RC8910, RC8911, andPC8910: 600 mm (W)×600 mm (D)×850 mm (H); Maxi-mum dimension with top and base: 600 mm (W) ×640 mm(D)×1050 mm (H).
� Maximum dimension of RC8931: 350 mm (W)×600 mm(D)×1700 mm (H); Maximum dimension with top and base:350 mm (W)×640 mm (D)×1900 mm (H).
Select the cabinet configuration according to the actual capacityand installation requirement. The typical configurations are as fol-lows:
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ZXSDR BS8900 GU360 System Description
AC StandardConfiguration:
BC8910+RC8911
FIGURE 3 AC STANDARD CONFIGURATION: BC8910+RC8911
1. BC89102. RC8911
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Chapter 1 Overview
AC Configuration:BC8910+RC8911+RC8931
FIGURE 4 AC CONFIGURATION: BC8910+RC8911+RC8931
1. BC89102. RC89313. RC8911
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ZXSDR BS8900 GU360 System Description
DC StandardConfiguration:
BC8910+RC8910
For DC configuration, B121 power subrack is not configured inBC8910.
FIGURE 5 DC STANDARD CONFIGURATION: BC8910+RC8910
1. BC8910 (DC configuration)2. RC8910
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Chapter 1 Overview
AC Configuration:BC8910+RC8910
FIGURE 6 AC CONFIGURATION: BC8910+RC8910
1. BC8910 (AC configuration) 2. RC8910
AC Configuration:BC8910+RC8910+PC8910
FIGURE 7 AC CONFIGURATION: BC8910+RC8910+PC8910
1. RC89102. BC89103. PC8910
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ZXSDR BS8900 GU360 System Description
System FeaturesBS8900 base station has the following features:
� Basic station functions
BS8900 is outdoor dual-mode base station product. It supportsboth GSM and UMTS.
� System structure
The architecture is based on separated baseband and RF. RFunit can be placed in the local cabinet or in remote area.Baseband unit adopts all-IP hardware platform and providesIP switching inside the product.
� Evolvement capacity
It uses uTCA platform and SDR technology and can smoothlyevolve to Enhanced EDGE. In terms of hardware, it can evolveto LTE and share hardware platform with future LTE.
� Capacity and configuration
� For GSM single mode
Three types of RF units can be used: dual-density RF unitRU02, multi-carrier RF unit RU60, and RSU60
RU02 can meet the requirement of sites with small capacity.One RU02 supports two GSM carrier frequencies.
RU06/RSU60 supports large capacity configuration. OneRU06/RSU60 supports six GSM carrier frequencies.
� For UMTS single mode
Three types of RF units can be used: RU60, RSU60 andRU40
On UMTS 900M/1800M band, use RU60/RSU60. OneRU60/RSU60 supports four UMTS carriers.
On UMTS 2100M band, use RU40. One RU400 supportsfour UMTS carriers.
RU60/RSU60 and RU40 can be mixed in a cabinet to providedifferent frequency networking.
� For GSM/UMTS dual mode
Use RU60/RSU60 RF unit. One RU60/RSU60 can supportfour GSM carriers plus one UMTS carrier, or two GSM car-riers plus two UMTS carriers.
� Networking capacity
Provides E1/F1 and GE optical/electric interface at Abis/Iub in-terface Supports star and chain networking modes
Meet various requirements on GSM/UMTS mixed networking indifferent scenarios
� Clock and synchronization
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Chapter 1 Overview
Supports multiple clock synchronization modes
� GPS-based radio interface clock synchronization
� External BITS synchronization clock input
� Abis/Iub-interface-E1/T1-synchronized upper-level clock
� GSM RF technology
By using flexible RF unit configuration and advanced softwaredefined radio (SDR) technology, BS8900 provides multiple RFsolutions to meet capacity and coverage requirements.
� Dual Power Combining Transmission (DPCT)
The two transmitters in the double density TRX implementDPCT. That is, the two transmitters send the same burstpulse at the same time to form a carrier through the com-biner, getting a larger downlink transmitting power and ex-tending the cell coverage area.
� Delay Diversity Transmission (DDT)
BS8900 supports downlink DDT. The two transmitterstransmit the same signal within a short delay, that is, thetwo transmitters work as one virtual transmitter, whichenhances the downlink signal and expands the coveragearea.
� Downlink transmit diversity
The downlink transmit diversity refers to that one carriersignal is transmitted through two antennas in a sector toform the space transmit diversity. It enhances the anti-fad-ing capability of downlink signal and increases the coveragearea.
� Interference Rejection Combining (IRC)
The IRC technology increases the receiver’s uplink sensi-tivity and increases the BTS’s uplink coverage area. WhenIRC technology is used, it is recommended that the BTS isequipped with at least two receiving antennas.
� Four Way Diversity Receiving (FWDR)
FWDR uses four antennas to receive uplink signals.BS8900can provide four diversity receptions for one carrier to ob-tain optimal gain. It enhances the uplink receiving perfor-mance as well as reduces the transmit power of MS. UsingFWDR and DDT simultaneously, using FWDR and DPCT si-multaneously, or using FWDR and downlink transmit diver-sity simultaneously enables the base station to implementultra-distance coverage.
Note:
Among the above functions, DPCT and DDT are only supportedby RU02.
� Installation and maintenance
� BS8900 includes outdoor RF cabinet RC8910, RC8911, andRC8931, site support cabinet BC8910, and battery cabi-
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ZXSDR BS8900 GU360 System Description
net PC8910. They can be installed in overlapped way or inparallel. The installation is easy and flexible. Choose therequired cabinets and installation method based on the ac-tual situation.
� External cables are led in through the cabinet bottom.
� Green design
BS8900 is of green design. Its Power Amplifier (PA) mod-ule adopts advanced technologies including Doherty, DPD, andMCPA, increasing the PA efficiency. For GSM S6/6/6 site typeand UMTS S2/2/2 site type, the power consumption of BS8900is less than 1260 W, which is half of the power of traditionaloutdoor macro base station.
� Outdoor environment adaptation capacity
BS8900 outdoor cabinet has good sealing effect, which enablesthe device to be free of water, dust, theft, rodent, and electro-magnetic interference. It complies with IP55 protection stan-dard and level-B lightning protection. It can be applied in var-ious outdoor application scenarios.
The BS8900 design guarantees effective heat dissipation. Itadopts internal heating technique to ensure that the equipmentcan work normally in low temperature. This strengthens theenvironment adaptation capacity of the product and realizesenergy-saving and environment protection.
Services and FunctionsThe equipment provides the following services and functions.
Services Table 1 lists the services.
TABLE 1 SERVICES PROVIDED
Service Type Descriptions
FR: Full-rate voice service
EFR: Enhanced full-rate voice service
HR: Half-rate voice service
AMR: Adaptive multi-rate voice service
F9.6: 9.6 kbps full-rate data service
GSM/EDGE service
GPRS/EDGE: GPRS/EDGE packet data service
Positioning service Providing three kinds of positioning method:� Positioning by CellID� Positioning by CellID+RTT� Positioning by AGPS
R99 service CS domain: AMR voice service (supporting 8rates), CS 64 kbps service
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Chapter 1 Overview
Service Type Descriptions
PS domain: UL/DL 64 kbps, UL/DL 128 kbps,and UL/DL 384 kbps service
Concurrent service: CS domain (AMR 12.2kbps, CS 64 kbps) + PS domain (64 kbps, 128kbps, 384 kbps)
HSDPA service Supporting a maximum data rate of 14.4 Mbps
Supporting 15 code channels at most
Supporting HSDPA and R99 services ondifferent carriers
Supporting co-frequency handover,hetero-frequency handover, and handoverbetween HSDPA and R99
Supporting concurrent service
Supporting stream media service
HSUPA service Supporting a maximum data rate of 5.76 Mbps
MBMS service Supporting broadcast and multicast functions,supporting PtP and PtM modes
Supporting mobility management
Supporting MBMS service of stream type andbackground type
HSPA+ service Supporting downlink data rate of 43.2 Mbps
Supporting uplink data rate of 11.5 Mbps
Functions � Basic functions
With Um/Uu interface, it accomplishes UE access and RF linktransmission, including:
� RF signal processing
� Channel coding and decoding
� Channel multiplexing and de-multiplexing
� Measurement and reporting
� Power control
� Transmission diversity
� Receiving diversity
� Calibration
� Synchronization
With Abis/Iub interface, it connects with BSC/RNC and accom-plishes the following functions:
� Cell management
� Reporting BTS measurement information
� Broadcasting system messages
� Access control
� Mobility management
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ZXSDR BS8900 GU360 System Description
� Radio resource management
� RF signal processing
� Transmission management
With operating and maintenance interface, it performs systemmanagement, including:
� Configuration management
� Alarm management
� Status checking and monitoring
� Dual mode
Supporting GSM/EDGE and UMTS, each mode can work in-dependently. Supporting mixed installation of boards withdifferent frequencies in the same cabinet and mixed installa-tion of boards with the same frequency in the same cabinet.Through relevant baseband board configuration, softwareversion downloading, and background configuration, the GSMnetwork and UMTS network can be upgraded, changed over,or run simultaneously.
Supporting GSM Phase I/GSM Phase II/GSM Phase II + stan-dards.
Supporting UMTS R99, R4, R5, R6, R7.
� Frequency hopping
The Equipment supports GSM baseband frequency hopping andRF frequency hopping.
� Power control
The Equipment supports downlink carrier power control. InGSM/EDGE mode, it supports static 6-level power control anddynamic 15-level power control.
� Discontinuous Transmission (DTX)
The equipment supports DTX, which reduces the transmittingpower and the total signal interference level in the air.
� Modulation modes
According to modulation commands issued by the base stationcontroller, the equipment supports multiple modulation modesincluding GMSK, 8PSK, QPSK, and 16-QAM.
� Transmission diversity and receiving diversity
In GSM mode, the equipment supports downlink transmissiondiversity, two-way/four-way diversity reception. It also sup-ports the four-antenna IRC technology.
� IRC switch control
The equipment can enable and disable the interference-elim-inating function through software. After the function is dis-abled, the system can be recovered to the state before thedisabling operation is performed.
� IP Abis interface
IP function is supported at Abis interface.
� GPS all-network synchronization
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Chapter 1 Overview
The GPS module is embedded in the baseband unit. The GPSclock is taken as the standard clock source for the entire basestation to realize the GSM system all-network synchronization.
� Carrier license control
The equipment performs license control for multi-carrier-mod-ule carrier, which can be commissioned according to a singlecarrier.
� Electrical antenna
The equipment supports electrical antenna and Tower MountedAmplifier (TMA).
� Viterbi decoding algorithm
The receiving end supports the Viterbi decoding algorithm, in-creasing the system receiving sensitivity and channel decodingcapability.
� Co-BCCH technology
The Co-BCCH technology is supported. It is often applied indual-band cell. The dual-band cell means that carriers of twobands are supported in the same cell, and carriers of differentbands share the same BCCH.
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ZXSDR BS8900 GU360 System Description
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C h a p t e r 2
Indices
Table of ContentsSystem Capacity ...............................................................15Working Frequency Bands...................................................15Cabinet Indices .................................................................16Power Supply Requirement .................................................16Power Consumption ...........................................................17RF Output Power ...............................................................18Static Receiving Sensitivity .................................................19Environment Requirement ..................................................19Reliability .........................................................................19EMC.................................................................................20Transmission Capacity ........................................................20Lightning Protection Levels .................................................21Dry Contact Capacity .........................................................21
System CapacityThe system carrier capacity is as follows:
� Maximum number of carriers supported by GSM single mode:a cabinet supports 36 TRX
� Maximum number of carrier sectors (CS) supported by UMTSsingle mode: 12 CSs (4C3S or 2C6S)
� Maximum configuration for GSM/UMTS dual mode: GSM 18TRX + UMTS 4C3S
� Maximum supported pure voice cell element (CE): 640 CEs foruplink, 640 CEs for downlink
� Maximum number of channels in a cell: 123
� Maximum throughput: 216 Mbps
Working Frequency BandsThe system supports GSM/UMTS 900 MHz, GSM/UMTS 1800 MHz,and UMTS 2100 MHz. The frequency band range is as follows:
� 900 MHz
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ZXSDR BS8900 GU360 System Description
Uplink (MS transmitting, BTS receiving) frequency band range:890 MHz ~ 915 MHz
Downlink (BTS transmitting, MS receiving) frequency bandrange: 935 MHz ~ 960 MHz
� 1800 MHz
Uplink (MS transmitting, BTS receiving) frequency band range:1710 MHz ~ 1785 MHz
Downlink (BTS transmitting, MS receiving) frequency bandrange: 1805 MHz ~ 1880 MHz
� 2100 MHz
Uplink (MS transmitting, BTS receiving) frequency band range:1920 MHz ~ 1980 MHz
Downlink (BTS transmitting, MS receiving) frequency bandrange: 2110 MHz ~ 2170 MHz
Cabinet IndicesThe cabinet indices are as follows:
� Color: grey
� Weight (full configuration):
� BC8910: 110 Kg
� PC8910 (cabinet weight): 52 Kg
� RC8910 (including six RUs): 150 Kg
� RC8911 (including three RUs): 103 Kg
� RC8931 (including three RUs): 115 Kg
� Dimensions (H xW xD:
� Dimensions of BC8910, PC8910, RC8910, and RC8911:850 mm x 600 mm x 600 mm
� Dimensions of BC8910, PC8910, RC8910, and RC8911 withtop and base: 1050 mm x 600 mm x 640 mm
� Dimensions of RC8931: 1700 mm x 350 mm x 600 mm
� Dimensions of RC8931 with top and base: 1900 mm x 350mm x 640 mm
Power Supply RequirementAllowed voltage range for external power:
� -48 V DC (-57 V DC ~ -40 V DC)
� 220 V AC (130 V AC300 V AC, 50 Hz60 Hz)
BTS backup battery:
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Chapter 2 Indices
A maximum of two 150AH storage battery groups, totally 300AH
Power ConsumptionIf using different RU units, the indexes of power consumption un-der various typical configuration are shown in and .
TABLE 2 GSM SINGLE-MODE CONFIGURATION (UNIT: W)
RadioUnit
Band S2/2/2 S4/4/4 S6/6/6 S12/12/12
900M Averagepowerconsump-tion:1207
Peakpowerconsump-tion:1760
Averagepowerconsump-tion:1590
Peakpowerconsump-tion:3090
- -RU02
1800M Averagepowerconsump-tion:1248
Peakpowerconsump-tion:1820
Averagepowerconsump-tion:1641
Peakpowerconsump-tion:3210
- -
RU60 - - - Averagepowerconsump-tion: 816
Peakpowerconsump-tion:1344
Averagepowerconsump-tion:1443
Peakpowerconsump-tion:2459
RSU60 - - - Averagepowerconsump-tion: 836
Peakpowerconsump-tion:1489
Averagepowerconsump-tion:1478
Peakpowerconsump-tion:2478
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ZXSDR BS8900 GU360 System Description
TABLE 3 UMTS SINGLE-MODE CONFIGURATION (UNIT: W)
RadioUnit
Band S111 S222 S333 S222222
RU40 2100M Averagepowerconsump-tion: 750
Peakpowerconsump-tion: 970
Averagepowerconsump-tion: 930
Peakpowerconsump-tion:1190
Averagepowerconsump-tion:1190
Peakpowerconsump-tion:1500
Averagepowerconsump-tion:1690
Peakpowerconsump-tion:2080
RU60 - Averagepowerconsump-tion: 794
Peakpowerconsump-tion:1019
Averagepowerconsump-tion:1058
Peakpowerconsump-tion:1221
Averagepowerconsump-tion:1171
Peakpowerconsump-tion:1428
-
RSU60 - Averagepowerconsump-tion: 744
Peakpowerconsump-tion: 967
Averagepowerconsump-tion: 967
Peakpowerconsump-tion:1117
Averagepowerconsump-tion:1079
Peakpowerconsump-tion:1299
-
RF Output PowerTable 4 describes the RF output power..
TABLE 4 RF OUTPUT POWER OF BS8900
RU TypE Power of Cabinet-top
RU02 GMSK 45W/8PSK 28W
RU02A GMSK 45W/8PSK 28W
RU60 (GSM) GMSK 60W/8PSK 40W
RU60 (UMTS) 60W
RU60 (G/U) 60W
RSU60 (GSM) GMSK 80W/8PSK 60W
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Chapter 2 Indices
RU TypE Power of Cabinet-top
RSU60 (UMTS) 80W
RSU60 (G/U) 80W
RU40 60W
Static Receiving SensitivityThe static receiving sensitivity of ZXSDR BS8800 system is as fol-lows:
� GSM: –112 dBm for single-antenna receiving
� UMTS: -126.5 dBm for single-antenna receiving
UMTS: -129.2 dBm for dual-antenna receiving
UMTS: -131.9 dBm for four-antenna receiving
Environment RequirementThe working environment requirement is as follows:
� Ambient temperature
-40 ℃~50 ℃ (is allowed to work 2 hours in limit temperature55 ℃)
� Relative humidity:
5%~98%
� Waterproof and dustproof level
IP55
� Grounding Requirements
≤5 Ω
In areas with less 20 days of thunderstorm per year, thegrounding resistance can be less than 10 Ω
� Storage conditions
Package the equipment and store in the room
Temperature: -45 ℃~70 ℃Relative humidity: 10%~98%
ReliabilityThe reliability indices are as follows:
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ZXSDR BS8900 GU360 System Description
� MTBF: more than 140,000 hours for overall system (full con-figuration)
� MTTR: less than 0.5 hour, excluding the time for delivering theequipment to the maintenance site.
� Reliability: more than 99.99965%
� Down time: less than 1.84 minute/year
EMCThe following standards are considered in satisfying Electromag-netic Compatibility (EMC) requirement:
� ETSI EN 301 489-01
� ETSI EN 301 489-23
� ETSI EN 301 489-26 (V2.2.1)
Note:
ETSI EN 301 489-01 is the general standard for radio equipmentEMC. It gives definitions of all radio equipment products, and spec-ifies all testing items, testing methods, and limits of disturbancetests for those products. ETSI EN 301 489-23 and ETSI EN 301489-26 give definitions of UMTS base stations and auxiliary equip-ments. They also specify testing items for different equipmentsand methods for establishing the testing environment, and givescriteria of the immunity test.
Transmission CapacityThe transmission capacity of BS8900 system is described in Table5.
TABLE 5 SYSTEM TRANSMISSION CAPACITY
TransmissionInterface
Amount Rate
E1/T1 8, can be expandedto 16
2 Mbit/s/1.544 Mbit/s
GE opticalinterface
1 1000 Mbit/s
GE electricalinterface
1 1000 Mbit/s
1. BS8900 system supports either one GE optical interface or one GE electricalinterface at the same time.
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Chapter 2 Indices
Lightning Protection LevelsThe AC power interface meets level B lightning protection, and theDC power interface meets level C lightning protection.
Dry Contact CapacityBS8900 supports 6 pairs of dry contact inputs and 2 pairs of drycontact inputs/outputs.
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ZXSDR BS8900 GU360 System Description
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C h a p t e r 3
System Structure
Table of ContentsHardware Structure ...........................................................23Software Structure ............................................................33
Hardware StructureHardware Composition
BS8900 hardware composition is shown in Figure 8.
FIGURE 8 HARDWARE COMPOSITION
� The BBU subsystem and RF subsystem are the main functionunits. They perform basic functions of the BTS.
� The power subsystem performs power conversion and distri-bution for the BTS. The B121 power in the BC8910 cabinet canprovide report of environment monitoring inside the cabinet.
� The fan monitoring subsystem performs heat dissipation, fanmonitoring, and inside cabinet environment monitoring report.
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ZXSDR BS8900 GU360 System Description
� The signal protection subsystem protects input/output signalsagainst lightning. It enables signal interface to meet outdoorBTS lightning protection requirement.
� The heat exchanger performs heat dissipation. BC8910 cabinetuses heat exchanger while RC8910/RC8911/RC8931 uses fansubsystem for heat dissipation.
� Transmission and microwave devices are optional. Configurethem based on the actual situation.
� Access control, flood, temperature, smoke sensors monitorcabinet environment and report to the power subsystem or thefan monitoring subsystem, which reports to the BBU subsys-tem finally.
Cabinet Layout
BS8900 cabinet layout is as follows:
BC8910 (AC) FIGURE 9 BC8910–AC
1. Heat exchanger2. Reserved space
3. Baseband layer4. Power distribution subrack
Subrack Dimensions Quantity Main features
Baseband layer 2U 1 Configure BBUand processbaseband data
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Chapter 3 System Structure
Subrack Dimensions Quantity Main features
Powerdistributionsubrack
6U 1 ConfigureB121 powerand provideDC powerfor internalmodules withinthe cabinet
Heat exchanger 4U 1 Cabinet heatdissipation
Reserved space 6U 1 Accommodateother devicessuch astransmissiondevice,lightningprotectionsubrack, andcable tray.Dummy panel isnot required.
BC8910 (DC) FIGURE 10 BC8910–DC
1. Heat exchanger2. Reserved space3. Baseband layer
4. Lightning protection subrack5. Cabling rack6. Power distribution subrack
Subrack Dimensions Quantity Main features
Baseband layer 2U 1 Configure BBUand processbaseband data
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ZXSDR BS8900 GU360 System Description
Subrack Dimensions Quantity Main features
Powerdistributionsubrack
3U 1 PDM, todistributepower insidethe cabinet
Heat exchanger 4U 1 Cabinet heatdissipation
Reserved space 6U 1 Accommodateother devicessuch astransmissiondevice,lightningprotectionsubrack, andcable tray.Dummy panel isnot required.
Lightningprotectionsubrack
2U 1 Lightningprotection forinput/output E1and trunk nodesignals.
Cabling rack 1U 1 Cabling insidethe cabinet
RC8911 FIGURE 11 RC8911
1. Fan subrack2. Power distribution subrack3. RF unit
4. Storage battery5. Base
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Chapter 3 System Structure
Subrack Dimensions Quantity Main features
RF unit Dimensions ofeach RU: 482.6mm (H)×88mm (W)×360mm (D)
3 Transmit andreceive radiosignals
Fan subrack - 1 Heat dissipationfor RF unit
Storage battery Dimensions ofa battery: 288mm (H)×110mm (W)×550mm (D)
4 Backup battery,providingpower for theequipmentwhen theexternal poweris cut off
Powerdistributionsubrack
- 1 Distributepower forthe overallequipment
RC8910 FIGURE 12 RC8910
1. Fan subrack2. Power distribution subrack3. RF unit4. Breaker and surge arrester5. Base
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ZXSDR BS8900 GU360 System Description
Subrack Dimensions Quantity Main features
RF unit Dimensions ofeach RU: 482.6mm (H)×88mm (W)×360mm (D)
6 Transmit andreceive radiosignals
Fan subrack - 1 Heat dissipationfor RF unit
Powerdistributionsubrack
- 1 Distributepower forthe overallequipment
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Chapter 3 System Structure
RC8931 FIGURE 13 RC8931
1. Fan subrack2. Power distribution subrack3. RF unit4. Storage battery
5. Base
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ZXSDR BS8900 GU360 System Description
Subrack Dimensions Quantity Main features
RF unit Dimensions ofeach RU: 482.6mm (H)×88mm (W)×360mm (D)
3 Transmit andreceive radiosignals
Fan subrack - 1 Heat dissipationfor RF unit
Storage battery Dimensions ofa battery: 288mm (H)×110mm (W)×550mm (D)
4 Backup battery,providingpower for theequipmentwhen theexternal poweris cut off
Powerdistributionsubrack
- 1 Distributepower forthe overallequipment
PC8910 FIGURE 14 PC8910
1. Storage battery 2. Base
Configure 8 batteries. The dimensions of each battery: 288 mm(H)×110 mm (W)×550 mm (D)
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Chapter 3 System Structure
Power Supply Subsystem
BS8900 power supply subsystem consists B121 power, PDM, andstorage battery, as shown in Figure 15.
FIGURE 15 POWER SUPPLY SUBSYSTEM
The power supply subsystem provides the following functions:
� AC/AC power input and protection
� AC/DC power conversion
� DC power output
� Status check control
� Battery heating
� Automatic battery management
BBU Subsystem
BBU subsystem consists of seven modules. For information abouteach module function, refer to the ZXSDR BS8900 GU360 OutdoorGSM$UMTS Dual Mode Macro NodeB Hardware Descriptions.
� PM: power module
� SA: site alarm module
� CC: main control board
� FS: fabric switch module
� BPC: UMTS baseband processing board
� UBPG: GSM baseband processing board
� FA: fan module
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ZXSDR BS8900 GU360 System Description
BBU provides the following functions:
� 19 inch rack installation and application, enabling users to per-form maintenance from the front.
� Supports mixed insertion of GSM/WCDMA baseband boards;supports GSM and WCDMA dual modes.
� Maximum configuration of GSM/EDGE mode: S12/12/12 (re-ceive diversity, no transmit diversity).
� Maximum configuration of GSM/WCDMA co-mode:S666+S333
� Supports remote application of RRU. The networking mode canbe star, chain, or link backup.
� Supports baseband sharing function.
� Supports transmit diversity and four channel diversity receiv-ing.
� Abis/Iub interface supports eight channels of E1/T1, two chan-nels of STM-1 (including one channel of cascading interface),and GE interface.
� Supports synchronization of radio interfaces based on GPS.
� Supports networking with iBSC and iOMCR.
� Supports BBU cascading networking.
� Externally provides RS232/RS485 monitoring communicationinterface. Supports input power over-/under-voltage alarm.Supports cabinet access control, temperature, and floodalarms. Supports equipment room access control, humidityand temperature, infrared, and smoke alarms. Supports sixchannels of input dry contact and two channels of output drycontact (can be configured as input).
RF Subsystem
Composition RF subsystem is composed of RU60, RU02, or RU40.
RU60 module consists of power PWDC, duplex filter DFL, trans-ceiver unit DTR, power amplifier PA60, and ASIG interface protec-tion board AIP.
RU02 module consists of power RPDC, duplex filter TDUP, trans-ceiver unit TTR, power amplifier TPAU, and ASIG interface protec-tion board PIBC.
R40 module consists of transceiver board DTR, power amplifierPA, duplexer DFL, lightning protection board PIB, and power unitPWDC.
Functions RF unit implements the conversion between air RF signal and digi-tal signals, and amplifies and transceives RF signals. RU60, RU02,or RU40 module can be selected.
1. RU60: used for GSM/UMTS. It supports a maximum of 6 car-riers for GSM and a maximum of 4 carrier for UMTS.
2. RU02: used for GSM only. It supports a maximum of 2 carriers.3. RU40: used for UMTS 2100 MHZ only. It supports a maximum
of 4 carriers.
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Chapter 3 System Structure
Fan Monitoring Subsystem
Fan monitoring subsystem consists of fans and FCE environmentmonitoring and fan control board. The FCE board consists of fancheck control unit, main control unit, CRU interface unit, environ-ment monitoring unit, and power interface unit. It is mainly usedto distribute power, adjust rotational speed, and monitor status forthe fans, check internal and external environment temperature inreal time, and collect signals about access control, flood, smoke,and lightning and emit alarms.
Fan monitoring subsystem provides the following functions:
� Supports six channel of fan rotational speed control and mon-itoring
� Provides one channel of 485 serial port to communicate withRU
� Provides three channels of trunk nodes, with one for accessmonitoring and two for power lightning protection monitoring
� Provides three channels of temperature sensor interfaces, withone for ORS air inlet temperature check and two for ORS airoutlet temperature check
� Provides one channel of smoke sensor interface
� Provides one channel of flood sensor interface
� Provides one channel of 232 debug serial port
The fans and FCE environment monitoring and fan control boardare installed within the fan subrack.
Software StructureThe software structure of BS8800 is shown in Figure 16
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ZXSDR BS8900 GU360 System Description
FIGURE 16 BS8800 SOFTWARE STRUCTURE
The software system consists of supporting software layer and ser-vice software layer.
1. The supporting software layer performs the following functionsto serve in different BTS modes.
� OSS is to provide some general software functions whichare independent from hardware, such as re-scheduling,timer, memory management, inter-board communication,system monitoring, log, and debugging, etc.
� SCS is to control the power-on sequence, active/standbychangeover, module management, subrack management,and rack management.
� OAM is to provide the configuration, alarm and performancemeasurement function.
� DBS is the database management system.
� BRS is used for protocol stack processing.
� BRACS is to control the access to bearer layer.
2. The GSM/UMTS service software layer performs the followingfunctions:
� Service signaling processing
� Configuration management
� Status management
� Communication management
� Database management
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C h a p t e r 4
Interfaces and Protocols
Table of ContentsOverview..........................................................................35Physical Interfaces.............................................................42
OverviewSystem protocol interfaces are shown in Figure 17
FIGURE 17 SYSTEM PROTOCOL INTERFACES
Table 6 describes these interfaces.
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ZXSDR BS8900 GU360 System Description
TABLE 6 INTERFACE DESCRIPTIONS
Interface Position Function
Abis Between BTS and BSC Communicating withBSC
Um Between MS and BTS Air interface
Baseband-RFinterface
Between baseband unitand radio unit
Connecting basebandunit and radio unit
Iub Between Node B andRNC
Communicating withRNC
Uu Between UE and Node B Air interface
Abis interface
Abis interface is between BTS and BSC.
InterfaceFunctions
Abis interface supports all services provided to users, and supportssignaling transmitting and connection function. It especially sup-ports radio resource management including BTS radio equipmentcontrol and allocation.
InterfaceRealization
Abis interface supports the following physical interfaces:
� Gigabit Ethernet (GE) interface
Abis interface supports GE optical interface or GE RJ45 inter-face. In this case, BTS and BSC are connected through opticalfiber or Ethernet cable. The network port of BTS and BSC is GEinterface with 1000 MHz bandwidth, and it self-adapts variousrates of 10 Mbps/100 Mbps/1000 Mbps.
� E1/T1 interface
When Abis interface adopts E1/T1 interface, BTS and BSC areconnected through a single E1 cable of 2.048 MHz bandwidthor a single T1 coaxial cable of 1.544 MHz bandwidth.
Protocol Hierarchy The following introduces user plane protocols and control planeprotocols respectively.
� Control plane protocol
i. Under the Ethernet transmission mode, the control planeprotocol stack of Abis interface is shown in Figure 18.
FIGURE 18 CONTROL PLANE PROTOCOL STACK OF ABIS INTERFACE– ETHERNET
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Chapter 4 Interfaces and Protocols
When Abis interface adopts Ethernet cable, the controlplane message is carried by SCTP protocol and encapsu-lated into IP message. The data link layer adopts standardEthernet MAC frame.
ii. Under the E1 transmission mode, the control plane protocolstack of Abis interface is shown in Figure 19.
FIGURE 19 CONTROL PLANE PROTOCOL STACK OF ABIS INTERFACE– E1
When Abis interface adopts E1 cable, the control planemessage is carried by SCTP protocol and encapsulated intoIP message. The data link layer adopts Point-to-Point Pro-tocol (PPP), and the IP message is carried by Internet Pro-tocol Control Protocol (IPCP) of PPP family. Multiple E1s canbe combined to form the Multilink-PPP group to increasethe bandwidth. The bottom layer adopts High Level DataLink Control (HDLC) to form the frame, converts the bytestream to bit stream and transmits it on physical media.
� User plane protocol
i. Under the Ethernet transmission mode, the user plane pro-tocol stack of Abis interface is shown in Figure 20.
FIGURE 20 USER PLANE PROTOCOL STACK OF ABIS INTERFACE –ETHERNET
The user plane message is carried by RTP protocol and en-capsulated into standard IP message. The data link layeradopts standard Ethernet MAC frame.
ii. Under the E1/T1 transmission mode, the user plane proto-col stack of Abis interface is shown in Figure 21.
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ZXSDR BS8900 GU360 System Description
FIGURE 21 USER PLANE PROTOCOL STACK OF ABIS INTERFACE – E1
The user plane message is carried by RTP protocol and en-capsulated into IP message. The data link layer adopts PPP,and the IP message is carried by IPCP of PPP family. Mul-tiple E1s can be combined to form the Multilink-PPP groupto increase the bandwidth. The bottom layer adopts HDLCto form the frame, converts the byte stream to bit streamand transmits it on physical media.
Um Interface
Um interface is between BTS and MS.
InterfaceFunctions
In PLMN, MS connects fixed part of the network through a radiochannel to enable subscribers to access communication services.To interconnect MS and BTS, a series of standards are set up forsignal transmission over the radio channel, which is the Um inter-face.
Protocol Hierarchy Um interface is designed with a hierarchical model. Figure 22shows the hierarchical model of circuit service protocols.
FIGURE 22 CIRCUIT SERVICE PROTOCOL HIERARCHY OF UM INTERFACE
On Um interface, circuit service protocols fall into the followingthree layers:
1. Layer–1 (bottom) is the physical layer. It consists of variouschannels and provides the basic radio channels for upper-levelmessage transmission.
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Chapter 4 Interfaces and Protocols
2. Layer–2 (middle) is the data link layer. It adopts Link AccessProtocol on Dm Channel (LAPDm). It comprises various datatransmission structures and controls data transmission.
3. Layer–3 (top) is the highest layer. It comprises various mes-sages and programs and provides service control. Layer 3 con-sists of the following three sub-layers:
� Radio-Resource management (RR)
� Mobility Management (MM)
� Connection Management (CM)
Figure 23 shows the hierarchical model of packet service protocols,which is implemented at BSC side.
FIGURE 23 PACKET SERVICE PROTOCOL STACK HIERARCHY OF UMINTERFACE
Relevant protocolsof Um interface
� GSM 04.03: It describes the channel structure and access ca-pability of Um interface.
� GSM 04.04: It specifies the physical layer structure of Um in-terface.
� GSM 04.05: It specifies the data link layer protocol of Um in-terface.
� GSM 04.08: It specifies the layer-3 protocol of Um interface.
InterfaceRealization
The air interface Um is realized through antenna feeder subsystemof the base station, including feeders and antennas.
Iub Interface
Iub interface is between Node B and RNC.
InterfaceFunctions
Iub interface performs the following functions:
� Transmission resource management
� Maintenance management
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ZXSDR BS8900 GU360 System Description
� O&M transmission
� System information management
� Common channel resource management
� Dedicated channel resource management
� Downlink shared channel resource management
� Timing and synchronization management
InterfaceRealization
Iub interface supports the following physical interfaces:
� Gigabit Ethernet (GE) interface
Iub interface supports GE optical interface or GE RJ45 inter-face. In this case, Node B and RNC are connected through opti-cal fiber or Ethernet cable. The network port of Node B and RNCis GE interface with 1000 MHz bandwidth, and it self-adaptsvarious rates of 10 Mbps/100 Mbps/1000 Mbps.
� E1/T1 interface
When Iub interface adopts E1/T1 interface, Node B and RNCare connected through a single E1 cable of 2.048 MHz band-width or a single T1 coaxial cable of 1.544 MHz bandwidth.
Protocol Hierarchy The following introduces user plane protocols and control planeprotocols respectively.
� Control plane protocol
i. Under the Ethernet transmission mode, the control planeprotocol stack of Iub interface is shown in Figure 24.
FIGURE 24 CONTROL PLANE PROTOCOL STACK OF IUB INTERFACE –ETHERNET
When Iub interface adopts Ethernet cable, the NBAP sig-naling is carried by SCTP protocol and encapsulated intoIP message. The data link layer adopts standard EthernetMAC frame.
ii. Under the E1 transmission mode, the control plane protocolstack of Iub interface is shown in Figure 25.
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FIGURE 25 CONTROL PLANE PROTOCOL STACK OF IUB INTERFACE– E1
When Iub interface adopts E1 cable, the NBAP signalingis carried by SCTP protocol and encapsulated into IP mes-sage. The data link layer adopts PPP, and the IP message iscarried by IPCP of PPP family. Multiple E1s can be combinedto form the Multilink-PPP group to increase the bandwidth.The bottom layer adopts HDLC to form the frame, convertsthe byte stream to bit stream and transmits it on physicalmedia.
� User plane protocol
i. Under the Ethernet transmission mode, the user plane pro-tocol stack of Iub interface is shown in Figure 26.
FIGURE 26 USER PLANE PROTOCOL STACK OF IUB INTERFACE –ETHERNET
The user plane FP frame is carried by UDP protocol andencapsulated into standard IP message. The data link layeradopts standard Ethernet MAC frame.
ii. Under the E1/T1 transmission mode, the user plane proto-col stack of Iub interface is shown in Figure 27.
FIGURE 27 USER PLANE PROTOCOL STACK OF IUB INTERFACE – E1
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ZXSDR BS8900 GU360 System Description
The user plane FP frame is carried by UDP protocol andencapsulated into standard IP message. The data link layeradopts PPP, and the IP message is carried by IPCP of PPPfamily. Multiple E1s can be combined to form the Multilink-PPP group to increase the bandwidth. The bottom layeradopts HDLC to form the frame, converts the byte streamto bit stream and transmits it on physical media.
Uu interface
Uu interface is air interface. The information exchange at Uu in-terface is implemented through the antenna feeder subsystem ofNode B, including feeders and antennas.
The System performs the following functions at Uu interface.
� Broadcasting, paging, and establishing radio connection withUE.
� Handover decision and execution, power control decision andexecution.
� Radio resource management and control.
Physical InterfacesTable 7 describes internal and external interfaces of BS8800 sys-tem.
TABLE 7 PHYSICAL INTERFACES OF BS8800 SYSTEM
Type Function PhysicalInterface
Position Descriptions
E1/T1 SA Supports 8ways, and canbe expanded to16 ways.
GigabitEthernet(GE) opticalinterface
CC
Abis/Iubinterface
GE electricalinterface
CC
Each CC boardprovides oneGE interface,and userscan select theoptical interfaceor the electricalinterface.
Um/Uuinterface
Antennafeeder RFinterface
RU Informationexchange at theair interface isimplementedthroughantenna feedersubsystem
Externalinterface
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Chapter 4 Interfaces and Protocols
Type Function PhysicalInterface
Position Descriptions
of the basestation.
Clocksource
RF interface CC One, which canhave GPS inputor BITS input.
Local oper-ation andmainte-nance
GE electricalinterface
CC Provides oneLMT interface.
Remoteoperationand main-tenance
GE interface CC Carried byAbis/Iubinterface.
Powersupply
-48 V/-48 VGND
PDM Two connectingterminals.
Internalinterface
Baseband-RFinterface
Opticalinterface
FS Each FS boardprovides 6TX/RX opticalinterfaces toconnect withthe RU module.
1. For details of CC, SA, RU, FS, and PDM, refer to System Working Principles.
The previous table lists only main internal and external inter-faces of BS8800. For more information, refer to the chapters ofboard/subrack interface description.
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C h a p t e r 5
Working Principles
Table of ContentsSystem Working Principles ..................................................45Signal Flow.......................................................................47Power Distribution .............................................................49Cabinet Heat Dissipation.....................................................50Cabinet Waterproof Handling...............................................51
System Working PrinciplesAccording to the system logic structure, BS8800 is divided into twoparts:
� Base Band Unit (BBU)
� Radio Unit (RU)
BBU and RU are connected by optical fiber, transferring basebandIQ data and OAM signaling. Figure 28 shows the system structureof BS8800.
FIGURE 28 BS8800 SYSTEM STRUCTURE
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ZXSDR BS8900 GU360 System Description
Baseband Layer BBU performs Abis/Iub interface functions, signaling processing,baseband processing, remote and local O&M functions, workingstatus monitoring, and alarm functions. Table 8 describes func-tions of boards and modules in the baseband layer.
TABLE 8 FUNCTIONS OF BOARDS AND MODULES IN BASEBAND LAYER
Board/Module Name Functions
CC Main controlboard
Performs main control function.
Provides system clock signal.
Performs Ethernet switchingfunction.
UBPG/BPC GSM basebandprocessingboard/UMTSbasebandprocessingboard
Performs FP processing.
Performs physical layercoding/decoding.
Performs modulation/demodu-lation.
Performs spreading/de-spreading protocol processing.
FS Networkswitching board
Performs IQ switching function.
Performs functions of basebandprocessing board and RUinterface.
SA On-site alarmboard
Provides system environmentmonitoring function, E1/T1interface, and dry contact.
PM Power module Performs functions of BBUpower supply input, voltageconversion, and power supplymonitoring.
FA Fan module Performs heat dissipation forBBU.
Provides functions ofmonitoring, power supply,and status reporting for thefan.
RF Layer RU performs the following functions:
� Mutual conversion between air RF signal and digital signal
� RF signal amplification and transceiving
Either RU60, RSU60, RU02, or RU40 can be selected, as describedin Table 9.
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Chapter 5 Working Principles
TABLE 9 FUNCTIONS OF BOARDS AND MODULES IN RF LAYER
Board/Module Name Functions
RU60 Multi-carrierradio unit
Used for GSM/UMTS
Supports 6 carriers at most inGSM mode
Supports 3 carriers at most inUMTS mode
RSU60 Multi-carrierradio unit
Used for GSM/UMTS
Supports 6 carriers at most inGSM mode
Supports 3 carriers at most inUMTS mode
RU02 Dual-densityradio unit
Only used for GSM
Supports 2 carriers at most
RU40 Multi-carrierradio unit
Only used for UMTS 2100 MHzband
Supports 4 carriers at most
Fan Subrack The fan subrack contains the fan and the fan control unit. The fanperforms heat dissipation for the equipment, while the fan controlunit performs functions of monitoring, power supply, and statusreporting for the fan.
PowerDistribution
Subrack
The power distribution subrack, also called as Power DistributionModule (PDM), performs power distribution and switch control forthe equipment.
Signal FlowSystem Service Signal Flow
Figure 29 shows the service data flow.
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ZXSDR BS8900 GU360 System Description
FIGURE 29 SERVICE DATA FLOW
� Downlink direction: The service data from BSC/RNC entersBBU through CC or SA. Abis/Iub interface IP protocol termi-nation and NAT conversion are implemented at CC. The datais then converted to internal IP datagram and transmitted tobaseband board (UBPG/BPC) through the Gigabit Ethernet(GE). The baseband board performs modulation, multiplexing,and rate adaptation for the internal IP datagram, and trans-mits it to the IQ switching unit of FS. Then, on the IQ switchingunit of FS, de-multiplexing, interleaving, frame forming, andparallel-serial conversion are implemented. Finally, the inter-nal IP datagram is distributed to RU through the baseband-RFinterface (optical interface).
Note:
If Abis/Iub interface adopts E1/T1 interface, then signal trans-ferring and protection are implemented through the SA board.If Abis/Iub interface adopts GE interface, then connect with theCC board directly.
� Uplink direction: The IQ switching unit of FS receives base-band signals from RU, performs de-multiplexing for them, andthen transmits them to baseband board through high-speedserial signals. The baseband board then performs demodula-tion for them to get the original service signals. These signalsare packaged into Ethernet frames, transmitted to the switch-ing center through GE, and processed according to Abis/Iubinterface transmission protocols on the CC board. Finally, theyare transmitted to BSC/RNC through E1/T1/GE.
System Control Signal Flow
The CC board implements the main control function. The controlsignal is distributed to all other boards through CC board. Figure30 shows the control signal flow.
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Chapter 5 Working Principles
FIGURE 30 CONTROL SIGNAL FLOW
System Clock Signal Flow
The system clock is distributed to all other boards through CCboard, and is distributed to RU through the optical interface. Fig-ure 31 shows the clock distribution.
FIGURE 31 CLOCK DISTRIBUTION
In Figure 31, the clock reference of CC board is from GPS network.The clock reference of CC board can be: GPS output clock refer-ence, Abis/Iub E1/T1 synchronous upper-level clock, or the inputBITS reference clock of CC’s front panel. Select different clocksources according to specific application scenarios.
Power DistributionFigure 32 shows the power distribution in BS8900 cabinet.
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ZXSDR BS8900 GU360 System Description
FIGURE 32 POWER DISTRIBUTION
Note:
� When the system inputs AC power, the external AC power firstconnects ZXDU58 B121, and then is distributed to the PDM ineach cabinet after being rectified by B121. PDM distributes theinput power to the corresponding RU carrier and fan subrackand provides control and overload protection for each powerinput.
� When the system inputs DC power, the power distribution inthe overall system is implemented by PDM. After the primarypower is input to the cabinet, the PDM distributes it to thebaseband layer (BC8910 is configured with BBU), RF unit, andfan subrack. PDM breaker provides switch for power control,which individually controls the baseband layer, each RF unit(RU60 or RU02), and poweon and poweroff of the fan subrack.
Cabinet Heat DissipationRC8911 HeatDissipation
The cooling air for RC8911 cabinet heat dissipation enters the cab-inet from the front door through ventilation cover, fan subrack, RFmodule, RF module, and air outlet.
RC8931 HeatDissipation
The cooling air for RC8931 cabinet heat dissipation enters the cab-inet from the front door through ventilation cover, fan subrack, RFmodule, RF module, and air outlet.
BC8910 HeatDissipation
BC8910 internal heat dissipation is realized through the heat ex-change between heat exchanger and ambient environment. Forpower rectifiers, the air duct is in front and back direction, andfor BBU and transmission device, the air duct is in left and rightdirection.
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Chapter 5 Working Principles
RC8910 HeatDissipation
RC8910 heat dissipation is the same as RC8911. The cooling airenters the cabinet from the front door through ventilation cover,fan subrack, RF module, and air outlet.
PC8910 HeatDissipation
PC8910 heat dissipation adopts natural heat dissipation.
Cabinet WaterproofHandlingThe five cabinets of BS8900 uses the same waterproof methods.Take RC8911 as an example.
The RC8911 main cabinet can be divided into front area and backarea by the carrier and PDM installation platform. The front areais seal area, which reaches IP55 waterproof level. The back areaallows direct ventilation, which reaches IP54 windproof level. Thewhole equipment meets waterproofing requirement by using seal-ing bars.
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C h a p t e r 6
System Maintenance
Table of ContentsMaintenance Overview .......................................................53Maintenance Functions .......................................................54
Maintenance OverviewThe maintenance of BS8900 involves remote maintenance and lo-cal maintenance. Figure 33 shows the maintenance system net-working of BS8900.
FIGURE 33 MAINTENANCE SYSTEM NETWORKING OF BS8900
� Remote maintenance
In remote maintenance, NetNumen M31, the general radioNetwork Element (NE) management system, is connected withOMM of BSC/RNC, and then connected with the base stationthrough Abis interface or Iub interface to implement operationand maintenance.
� Local maintenance
In local maintenance, PC is directly connected with the basestation through Ethernet cable to implement operation andmaintenance.
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ZXSDR BS8900 GU360 System Description
Maintenance FunctionsIn BS8900, the O&M interface of remote maintenance system isin the form of topological graphics. Information of each NE in thenetwork can be viewed on the interface. Users can select the NE tobe maintained and check its performance data, alarm information,and configuration data. Users can also perform maintenance for acertain type of NEs through the topological graphics interface.
The maintenance system performs the following functions:
� Configuration management
In configuration management, physical/radio resource datacan be added, queried, deleted, and modified for the basestation. It also performs data consistency check, and supportsdynamic data configuration and static data configuration.
� Security management
It guarantees that only authorized users can perform relevantcommand group operations.
� Performance management
It implements performance analysis, call tracing, and signalingtracing.
� Version management
With version management, users can view hardware/softwareversions running at the foreground. The background providesa software downloading system for software upgrade at theforeground.
� Fault management
Fault management includes alarm management and diagnosisand test. It performs centralized monitoring of running sta-tus of the base station and collects abnormal information ofboards and links in real time. These functions make it con-venient for operation and maintenance personnel to performanalysis, make decision, and implement maintenance and re-pair.
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C h a p t e r 7
Networking
Table of ContentsStar Networking ................................................................55Chain Networking ..............................................................56Ring Networking................................................................56
Star NetworkingApplicationScenario
Star networking is usually applied in urban areas with dense pop-ulation.
Networking Mode In star networking, each site has n transmission links which di-rectly connect to BSC/RNC. The BTS equipment of each site is ter-minal equipment. Figure 34 shows the star networking of BS8900.
FIGURE 34 SCHEMATIC DIAGRAM OF STAR NETWORKING MODE
Advantages andDisadvantages
This networking mode is simple, facilitating construction and main-tenance. Since signal passes through fewer intermediate linksalong the transmission path, the link reliability is much higher.However, compared with other networking modes, the star net-working mode requires the largest amount of transmission cables.
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ZXSDR BS8900 GU360 System Description
Chain NetworkingApplicationScenario
Chain networking is usually applied in strip-shaped areas withsparse population, such as areas along the highway and railway.
Networking Mode To avoid clock performance degrading, it is recommended not tocascade more than 4 BTSs in the chain networking mode. Figure35 shows the chain networking mode of BS8900.
FIGURE 35 SCHEMATIC DIAGRAM OF CHAIN NETWORKING MODE
Advantages andDisadvantages
With chain networking, a large amount of transmission equipmentscan be saved. However, since signal passes through many inter-mediate links, the link reliability is comparatively lower.
Ring NetworkingApplicationScenario
Ring networking can be applied in common application scenarios.Because the ring networking has good self-healing capability, routepermitting, it is usually recommended to adopt the ring networkingmode.
Networking Mode In case of some part of the ring being broken, the ring becomestwo links, guaranteeing normal working of each BTS. Figure 36shows the ring networking mode of BS8900.
FIGURE 36 SCHEMATIC DIAGRAM OF RING NETWORKING MODE
Advantages andDisadvantages
The ring networking has higher reliability than the chain network-ing, it has good self-healing capability and guarantees normal ser-vices in case of link being broken.
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C h a p t e r 8
Configuration
Table of ContentsConfiguration Principles ......................................................57GSM Single Mode Configuration ...........................................59UMTS Single Mode Configuration .........................................61GSM/UMTS Dual Mode Configuration ....................................64Typical Configurations(RU60) ..............................................67
Configuration PrinciplesThe following describes the integrated equipment configuration,BBU configuration, and RU configuration.
IntegratedEquipment
Configuration
describes configurations of subracks and functional layers.
TABLE 10 INTEGRATED EQUIPMENT CONFIGURATION
Cabinet Layer/Sub-rack
Amount Configuration Description
Basebandlayer
1 Only one BBUs can beconfigured.
RF layer 1 Only one RU can be configured.
Power dis-tributionsubrack
1 Mandatory
Fansubrack
1 Mandatory
Primarycabinet
Ventilationsubrack
1 Mandatory
BBU Configuration describes the BBU configuration.
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TABLE 11 BBU CONFIGURATION
Board/Module Amount Configuration Description
CC 1, 2 � At least one CC should beconfigured.
� If active/standby function isrequired, two CCs should beconfigured.
FS 1, 2 At least one FS should beconfigured.
UBPG 1 ~ 5
BPC 1 ~ 5
� In GSM mode, the UBPGboard is configured, while inUMTS mode, the BPC board isconfigured.
� At most 5 UBPG+BPC can beconfigured.
� A single UBPG board canprocess 12 TRXs.
� A single BPC board supports 3CS, and provides a processingcapability of uplink 128 CE anddownlink 128 CE.
SA 1 Mandatory
PM 2 Mandatory
FA 1 Mandatory
RU Configuration describes the RU configuration.
TABLE 12 RU CONFIGURATION
Board Amount Configuration Description
RU60/RSU60 1 ~ 6 � In GSM mode, a single RU60 supports6 TRXs at most.
� In UMTS mode, a single RU60 supports3 CS.
� In GSM/UMTS dual mode, a singleRU60 supports GSM 4 TRX + UMTS 1CS or GSM 2 TRX + UMTS 2 CS.
RU02 1 ~ 6 Only used in GSM mode. A single RU02supports 2 TRXs at most.
RU40 1 ~ 6 Only used for 2100 MHz band in UMTSmode. A single RU40 supports 4 CS atmost.
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Chapter 8 Configuration
GSM Single ModeConfigurationIn GSM single mode, RU02 can be configured with 1 ~ 2 carriers,while RU60 can be configured with 1 ~ 6 carriers through softwareconfiguration.
RU60 Configura-tion
The following lists board configurations of typical site types S6,S12, S6/6/6, and S12/12/12.
TABLE 13 BOARD CONFIGURATION OF S6 SITE IN GSM SINGLE MODE
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CCboards.
UBPG 1 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FSboards.
S6
RU RU60 1 -
TABLE 14 BOARD CONFIGURATION OF S12 SITE IN GSM SINGLE MODE
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CCboards.
UBPG 1 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FSboards.
S12
RU RU60 2 -
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TABLE 15 BOARD CONFIGURATION OF S6/6/6 SITE IN GSM SINGLE MODE
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CCboards.
UBPG 2 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FSboards.
S6/6/6
RU RU60 3 -
TABLE 16 BOARD CONFIGURATION OF S12/12/12 SITE IN GSM SINGLEMODE
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CCboards.
UBPG 3 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FSboards.
S12/12/12
RU RU60 6 -
RU02 Configura-tion
The following lists board configurations of typical site types S2 ,S2/2/2, and S4/4/4.
TABLE 17 BOARD CONFIGURATION OF S2 SITE IN GSM SINGLE MODE
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CCboards.
UBPG 1 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FSboards.
S2
RU RU02 1 -
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Chapter 8 Configuration
TABLE 18 BOARD CONFIGURATION OF S2/2/2 SITE IN GSM SINGLE MODE
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CCboards.
UBPG 1 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FSboards.
S2/2/2
RU RU02 3 -
TABLE 19 BOARD CONFIGURATION OF S4/4/4 SITE IN GSM SINGLE MODE
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CCboards.
UBPG 1 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FSboards.
S4/4/4
RU RU02 6 -
UMTS Single ModeConfigurationFor UMTS 900 MHz/1800 MHz single mode, RU60 is used, whilefor UMTS 2100 MHz single mode, RU40 is used.
RU60 Configura-tion
The following lists board configurations of typical site types 3C1S,6C1S, 1C3S, and 4C3S.
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TABLE 20 BOARD CONFIGURATION OF 3C1S SITE IN UMTS SINGLE MODE
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CCboards.
BPC 1 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FSboards.
3C1S
RU RU60 1 -
TABLE 21 BOARD CONFIGURATION OF 6C1S SITE IN UMTS SINGLE MODE
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CCboards.
BPC 2 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FSboards.
6C1S
RU RU60 2 -
TABLE 22 BOARD CONFIGURATION OF 1C3S SITE IN UMTS SINGLE MODE
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CCboards.
BPC 1 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FSboards.
1C3S
RU RU60 3 -
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Chapter 8 Configuration
TABLE 23 BOARD CONFIGURATION OF 4C3S SITE IN UMTS SINGLE MODE
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CCboards.
BPC 4 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FSboards.
4C3S
RU RU60 6 -
RU40 Configura-tion
The following lists board configurations of typical site types 1C3S,3C3S, 4C3S, and 2C6S.
TABLE 24 BOARD CONFIGURATION OF 1C3S SITE IN UMTS SINGLE MODE
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CCboards.
BPC 1 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FSboards.
1C3S
RU RU40 3 -
TABLE 25 BOARD CONFIGURATION OF 3C3S SITE IN UMTS SINGLE MODE
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CCboards.
BPC 3 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FSboards.
3C3S
RU RU40 3 -
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TABLE 26 BOARD CONFIGURATION OF 4C3S SITE IN UMTS SINGLE MODE
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CCboards.
BPC 4 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FSboards.
4C3S
RU RU40 6 -
TABLE 27 BOARD CONFIGURATION OF 2C6S SITE IN UMTS SINGLE MODE
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CCboards.
BPC 4 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FSboards.
2C6S
RU RU40 6 -
GSM/UMTS Dual ModeConfigurationThere are two cases in GSM/UMTS dual mode networking.
� Co-frequency networking: GSM 900 MHz/1800 MHz and UMTS900 MHz/1800 MHz
� Hetero-frequency networking: GSM 900 MHz/1800 MHz andUMTS 2100 MHz
Co-frequencyNetworking
The following lists board configurations of typical site types inGSM/UMTS dual mode co-frequency networking.
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Chapter 8 Configuration
TABLE 28 BOARD CONFIGURATION IN GSM/UMTS DUAL MODE(GSM:S4+UMTS:S1 OR GSM:S2+UMTS:S2)
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CC boards.
UBPG 1 -
BPC 1 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FS boards.
GSM:S4+UMTS:S1orGSM:S2+UMTS:S2
RU RU60 1 -
TABLE 29 BOARD CONFIGURATION IN GSM/UMTS DUAL MODE(GSM:S8+UMTS:S2)
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CC boards.
UBPG 1 -
BPC 1 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FS boards.
GSM:S8+UMTS:S2
RU RU60 2 -
TABLE 30 BOARD CONFIGURATION IN GSM/UMTS DUAL MODE(GSM:S4+UMTS:S4)
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CC boards.
UBPG 1 -
BPC 2 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FS boards.
GSM:S4+UMTS:S4
RU RU60 2 -
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TABLE 31 BOARD CONFIGURATION IN GSM/UMTS DUAL MODE(GSM:S4/4/4+UMTS:S1/1/1)
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CC boards.
UBPG 1 -
BPC 1 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FS boards.
GSM:S4/4/4+UMTS:S1/1/1
RU RU60 3 -
TABLE 32 BOARD CONFIGURATION IN GSM/UMTS DUAL MODE(GSM:S2/2/2+UMTS:S2/2/2)
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CC boards.
UBPG 1 -
BPC 2 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FS boards.
GSM:S2/2/2+UMTS:S2/2/2
RU RU60 3 -
TABLE 33 BOARD CONFIGURATION IN GSM/UMTS DUAL MODE(GSM:S6/6/6+UMTS:S3/3/3)
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CC boards.
UBPG 2 -
BPC 3 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FS boards.
GSM:S6/6/6+UMTS:S3/3/3
RU RU60 6 -
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TABLE 34 BOARD CONFIGURATION IN GSM/UMTS DUAL MODE(GSM:S8/8/8+UMTS:S2/2/2)
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CC boards.
UBPG 2 -
BPC 2 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FS boards.
GSM:S8/8/8+UMTS:S2/2/2
RU RU60 6 -
Hetero-frequencyNetworking
In GSM/UMTS dual mode hetero-frequency networking, both RU40and RU60 should be configured. RU40 is used for UMTS 2100 MHzwhile RU60 is used for GSM 900 MHz/1800 MHz.
TABLE 35 BOARD CONFIGURATION IN GSM/UMTS DUAL MODEHETERO-FREQUENCY NETWORKING
Site Type Board Amount Remark
CC 1, 2 For active/standbyconfiguration,configure 2 CC boards.
UBPG 2 -
BPC 3 -
BBU
FS 1, 2 For load-sharingconfiguration,configure 2 FS boards.
RU60 3 -
GSM:S666(900M/1800M)+UMTS:S333(2100M)
RU
RU40 3
Typical Configurations(RU60)This section takes RU60 for example to explain the system siteconfigurations.
TypicalConfigurationsin GSM Mode
1. S6–type site configuration
Figure 37 shows the S6-type site configuration.
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ZXSDR BS8900 GU360 System Description
FIGURE 37 S6-TYPE SITE CONFIGURATION
This configuration also supports site types S1, S2, S3, S4, andS5.
2. S12–type site configuration
Figure 38 shows the S12-type site configuration.
FIGURE 38 S12-TYPE SITE CONFIGURATION
This configuration also supports site types S7, S8, S9, S10,and S11.
3. S6/6/6–type site configuration
Figure 39 shows the S6/6/6-type site configuration.
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Chapter 8 Configuration
FIGURE 39 S6/6/6-TYPE SITE CONFIGURATION
This configuration also supports site types S1/1/1, S2/2/2,S3/3/3, S4/4/4, and S5/5/5.
4. S12/12/12–type site configuration
Figure 40 shows the S12/12/12-type site configuration.
FIGURE 40 S12/12/12-TYPE SITE CONFIGURATION
This configuration also supports site types S7/7/7, S8/8/8,S9/9/9, S10/10/10, and S11/11/11.
TypicalConfigurationsin UMTS Mode
1. 3C1S-type site configuration
Figure 41 shows the 3C1S-type site configuration.
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ZXSDR BS8900 GU360 System Description
FIGURE 41 3C1S-TYPE SITE CONFIGURATION
2. 6C1S-type site configuration
Figure 42 shows the 6C1S-type site configuration.
FIGURE 42 6C1S-TYPE SITE CONFIGURATION
3. 1C3S-type site configuration
Figure 43 shows the 1C3S-type site configuration.
FIGURE 43 1C3S-TYPE SITE CONFIGURATION
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Chapter 8 Configuration
4. 4C3S-type site configuration
Figure 44 shows the 4C3S-type site configuration.
FIGURE 44 4C3S-TYPE SITE CONFIGURATION
TypicalConfigurations inGSM/UMTS Dual
Mode
1. Single-sector GSM:S4+UMTS:S1 or GSM:S2+UMTS:S2 siteconfiguration
Figure 45 shows the configuration of single-sectorGSM:S4+UMTS:S1 site or GSM:S2+UMTS:S2 site.
FIGURE 45 CONFIGURATION OF SINGLE-SECTOR GSM:S4+UMTS:S1SITE OR GSM:S2+UMTS:S2 SITE
2. Single-sector GSM:S8+UMTS:S2 or GSM:S4+UMTS:S4 siteconfiguration
Figure 46 shows the configuration of single-sectorGSM:S8+UMTS:S2 site or GSM:S4+UMTS:S4 site.
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FIGURE 46 CONFIGURATION OF SINGLE-SECTOR GSM:S8+UMTS:S2SITE OR GSM:S4+UMTS:S4 SITE
3. Three-sector GSM:S4/4/4+UMTS:S1/1/1 orGSM:S2/2/2+UMTS:S2/2/2 site configuration
Figure 47 shows the configuration of three-sec-tor GSM:S4/4/4+UMTS:S1/1/1 site orGSM:S2/2/2+UMTS:S2/2/2 site.
FIGURE 47 CONFIGURATION OF THREE-SECTOR GSM:S4/4/4+UMTS:S1/1/1 SITE ORGSM:S2/2/2+UMTS:S2/2/2 SITE
4. Three-sector GSM:S6/6/6+UMTS:S3/3/3 orGSM:S8/8/8+UMTS:S2/2/2 site configuration
Figure 48 shows the configuration of three-sec-tor GSM:S6/6/6+UMTS:S3/3/3 site orGSM:S8/8/8+UMTS:S2/2/2 site.
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Chapter 8 Configuration
FIGURE 48 CONFIGURATION OF THREE-SECTOR GSM:S6/6/6+UMTS:S3/3/3 SITE ORGSM:S8/8/8+UMTS:S2/2/2 SITE
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C h a p t e r 9
Reliability
Table of ContentsHardware Reliability ...........................................................75Software Reliability ............................................................76
Hardware ReliabilityThe hardware reliability is achieved through the following points:
1. Structure design
RC8911 and RC8931 cabinets can be divided into front areaand back area. The front area is sealing area reaching IP55.The back area allows direct ventilation from outside, reachingIP54.
The overall heat consumption concentrates on RU60/RU02. RFmodule adopts sealed structure and therefore RC8911 maincabinet and RC8931 side cabinet use direction ventilation .Four fans are used for ventilation and heat dissipation. Thefans meet IP54 dustproof requirement.
Two dustproof nets are placed at the air inlet in front door. Oneis metal dustproof net, which has large net holes to preventlarge sized foreign object, and the other is thin hole dustproofnet. By using the two dustproof nets and sealing interface, thefront area reaches IP55 dustproof requirement.
2. Anti-static design
All parts within the cabinet are tightly connected by metalscrews. The static and discharge levels are: ±8kV for con-tact discharge and ±15kV for air discharge.
3. Lightning protection design
The lightning protection measures are as follows:
� For AC power supply, realize level-B lightning protectionand reach 50KA protection
� For DC power supply, realize level-C lightning protectionand reach 15KA protection
4. Grounding system design
The cabinet grounding uses single-point grounding. Thegrounding bar of each cabinet uses galvanized steel plate toweld to the bottom plate and ensures good contact.
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5. Shielding design
The door and cabinet main body are connected through con-ductive wires. The cabinet is connected to the outside througha grounding point.
6. Anti-fault design
To avoid wrong line connection, the sockets connecting differ-ent boards use different numbers of pins. The socket lines ofthe same board are marked clearly with symbols. If socketswith the same specifications exist, the power-correspondingpin and grounding lines are consistent so that the circuit is notdamaged in case of wrong line connection. In addition, for thesame set of sockets, use the same color and for different setsuse colors as different as possible.
The structure design ensures that the parts cannot be installedreversely or in wrong places. The board components arealigned in the same direction, encapsulated and attached withposition mark.
Software ReliabilityBS8900 system provides the following functions to guarantee soft-ware reliability.
1. Reliability of software running
� Periodically performing statistics for CPU occupancy andstack.
� Monitoring abnormalities such as the system CPU beingoverloaded, task in infinite loop, task suspense, and dead-lock.
� Capturing various abnormal status of CPU and performingrelevant processing.
� Providing the reset log and black box and recording on-siteinformation when the board software has error, which fa-cilitates fault location.
2. Reliability of database management
� Supporting the abnormality reporting mechanism duringthe process of configuring site through Network Manage-ment (NM) software, and providing detailed error informa-tion.
� Performing foreground-background data consistencycheck, and guaranteeing the consistency of fore-ground-background configuration data through whole-ta-ble configuration, data uploading, and foreground-back-ground data increment synchronization.
� Supporting active/standby machine hot backup. Theactive-standby machine data consistency is guaranteedthrough active-standby whole-table synchronization andactive-standby increment synchronization.
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� Supporting the data saving protection mechanism.Through mechanisms such as data file mapping, log file,and reserved memory, data will not be damaged in case ofpower-down during the data saving process, and can stillpass the integrity and consistency check.
� Providing the function of recording abnormality log andforeground/background configuration operations, which fa-cilitates fault location.
3. Reliability of link transmission
� Supporting active/standby link changeover.
� The transmission layer adopts reliable transmission proto-cols, preventing the distributed denial of service attack.
� The network layer adopts VRF to realize multiplexing ofIP resource and route tables, and supports the function ofusing default gateway for transmission in case of failure insearching routes.
� The link layer adopts Vlan to separate broadcasts, whichavoids the mutual influence of broadcast storm.
� The protocol stack provides the function of receivingpacket processing protection, which prevents the resourceexhaustion due to broadcast storm.
� The IPinIP protocol is adopted to bear the NM channel, sep-arating O&M and service processing.
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C h a p t e r 10
Standards Followed
Table of ContentsCommunication Standards ..................................................79
Communication StandardsThe communication standards followed in BS8900 system arelisted in Table 36.
TABLE 36 COMMUNICATION STANDARDS
Serial Number Name Version
3GPP TS 23.053 Tandem Free Operation (TFO); Service description;Stage 2
4.0.1
3GPP TS 43.055 Dual Transfer Mode (DTM); Stage 2 4.6.0
3GPP TS 25.901 Network Assisted Cell Change (NACC) from UTRAN toGERAN; Network side aspects
6.1.0
3GPP TS 43.064 General Packet Radio Service (GPRS); Overall descriptionof the GPRS radio interface; Stage 2
4.5.0
3GPP TS 43.068 Voice Group Call Service (VGCS); Stage 2 4.6.0
3GPP TS 43.069 Voice Broadcast service (VBS); Stage 2 4.5.0
3GPP TS 25.141 Base Station (BS) conformance testing (FDD) 4.8.0
3GPP TS 25.142 Base Station (BS) conformance testing (TDD) 4.9.0
3GPP TS 45.902 Flexible Layer One (FLO) 6.8.0
3GPP TS 45.002 Multiplexing and multiple access on the radio path 4.8.0
ITU-T G.707/Y.1322 Network node interface for the synchronous digitalhierarchy (SDH)
ITU-T G.703 Physical/electrical characteristics of hierarchical digitalinterfaces
ITU-T G.704 Synchronous frame structures used at1544 6312 2048 8448 and 44 736 kbit/s hier-archical levels
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Serial Number Name Version
ITU G.722.2 Wideband coding of speech at around 16 kbit/s usingAdaptive Multi-Rate Wideband (AMR-WB)
T1.102-1993 Digital Hierarchy - Electrical Interfaces
T1.403-1999 Network and Customer Installation Interfaces - DS1 -Electrical Interface
ITU-T I.432.2 155 520 kbit/s and 622 080 kbit/s operation
ITU-T I.432.3 B-ISDN user-network interface – Physical layerspecification: 1544 kbit/s and 2048 kbits operation
ITU-T G.957 Optical interfaces for equipments and systems relatingto the synchronous digital hierarchy
T1.105-1995 Synchronous Optical Network (SONET) - BasicDescription including Multiplex Structure Rates andFormats
ANSI INCITS 352 Information Technology Fibre Channel Physical Interfaces(FC-PI)
AISG1:Issue 1.1 Control interface for antenna line devices
RFC 791 Internet Protocol.
RFC 2507 IP Header Compression
RFC0768 UDP
RFC0791 IP
RFC0793 TCP
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Figures
Figure 1 Position of BS8900 in GSM/EDGE/UMTS System ......... 2
Figure 2 Cabinet appearance................................................ 3
Figure 3 AC Standard Configuration: BC8910+RC8911 ............ 4
Figure 4 AC Configuration: BC8910+RC8911+RC8931 ............ 5
Figure 5 DC Standard Configuration: BC8910+RC8910............ 6
Figure 6 AC Configuration: BC8910+RC8910.......................... 7
Figure 7 AC Configuration: BC8910+RC8910+PC8910............. 7
Figure 8 Hardware Composition ...........................................23
Figure 9 BC8910–AC ..........................................................24
Figure 10 BC8910–DC........................................................25
Figure 11 RC8911..............................................................26
Figure 12 RC8910..............................................................27
Figure 13 RC8931..............................................................29
Figure 14 PC8910 ..............................................................30
Figure 15 Power Supply Subsystem......................................31
Figure 16 BS8800 Software Structure...................................34
Figure 17 System Protocol Interfaces ...................................35
Figure 18 Control Plane Protocol Stack of Abis Interface –
Ethernet...........................................................36
Figure 19 Control Plane Protocol Stack of Abis Interface – E1...37
Figure 20 User Plane Protocol Stack of Abis Interface –
Ethernet...........................................................37
Figure 21 User Plane Protocol Stack of Abis Interface – E1 ......38
Figure 22 Circuit Service Protocol Hierarchy of Um Interface....38
Figure 23 Packet Service Protocol Stack Hierarchy of Um
Interface ..........................................................39
Figure 24 Control Plane Protocol Stack of Iub Interface –
Ethernet...........................................................40
Figure 25 Control Plane Protocol Stack of Iub Interface – E1....41
Figure 26 User Plane Protocol Stack of Iub Interface –
Ethernet...........................................................41
Figure 27 User Plane Protocol Stack of Iub Interface – E1 .......41
Figure 28 BS8800 System Structure.....................................45
Figure 29 Service Data Flow................................................48
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Figure 30 Control Signal Flow..............................................49
Figure 31 Clock Distribution ................................................49
Figure 32 Power Distribution ...............................................50
Figure 33 Maintenance System Networking of BS8900............53
Figure 34 Schematic Diagram of Star Networking Mode ..........55
Figure 35 Schematic Diagram of Chain Networking Mode ........56
Figure 36 Schematic Diagram of Ring Networking Mode ..........56
Figure 37 S6-Type Site Configuration ...................................68
Figure 38 S12-Type Site Configuration..................................68
Figure 39 S6/6/6-Type Site Configuration .............................69
Figure 40 S12/12/12-Type Site Configuration ........................69
Figure 41 3C1S-Type Site Configuration................................70
Figure 42 6C1S-Type Site Configuration................................70
Figure 43 1C3S-Type Site Configuration................................70
Figure 44 4C3S-Type Site Configuration................................71
Figure 45 Configuration of Single-Sector GSM:S4+UMTS:S1
Site or GSM:S2+UMTS:S2 Site ............................71
Figure 46 Configuration of Single-Sector GSM:S8+UMTS:S2
Site or GSM:S4+UMTS:S4 Site ............................72
Figure 47 Configuration of Three-Sector
GSM:S4/4/4+UMTS:S1/1/1 Site or
GSM:S2/2/2+UMTS:S2/2/2 Site ..........................72
Figure 48 Configuration of Three-Sector
GSM:S6/6/6+UMTS:S3/3/3 Site or
GSM:S8/8/8+UMTS:S2/2/2 Site ..........................73
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Tables
Table 1 Services Provided ...................................................10
Table 2 GSM Single-Mode Configuration (unit: W)..................17
Table 3 UMTS Single-Mode Configuration (Unit: W) ................18
Table 4 RF Output Power of BS8900 .....................................18
Table 5 System Transmission Capacity..................................20
Table 6 Interface Descriptions .............................................36
Table 7 Physical Interfaces of BS8800 System .......................42
Table 8 Functions of Boards and Modules in Baseband Layer....46
Table 9 Functions of Boards and Modules in RF Layer..............47
Table 10 Integrated Equipment Configuration ........................57
Table 11 BBU Configuration.................................................58
Table 12 RU Configuration...................................................58
Table 13 Board Configuration of S6 Site in GSM Single Mode ...59
Table 14 Board Configuration of S12 Site in GSM Single Mode...59
Table 15 Board Configuration of S6/6/6 Site in GSM Single
Mode ...............................................................60
Table 16 Board Configuration of S12/12/12 Site in GSM
Single Mode......................................................60
Table 17 Board Configuration of S2 Site in GSM Single Mode ...60
Table 18 Board Configuration of S2/2/2 Site in GSM Single
Mode ...............................................................61
Table 19 Board Configuration of S4/4/4 Site in GSM Single
Mode ...............................................................61
Table 20 Board Configuration of 3C1S Site in UMTS Single
Mode ...............................................................62
Table 21 Board Configuration of 6C1S Site in UMTS Single
Mode ...............................................................62
Table 22 Board Configuration of 1C3S Site in UMTS Single
Mode ...............................................................62
Table 23 Board Configuration of 4C3S Site in UMTS Single
Mode ...............................................................63
Table 24 Board Configuration of 1C3S Site in UMTS Single
Mode ...............................................................63
Confidential and Proprietary Information of ZTE CORPORATION 83
ZXSDR BS8900 GU360 System Description
Table 25 Board Configuration of 3C3S Site in UMTS Single
Mode ...............................................................63
Table 26 Board Configuration of 4C3S Site in UMTS Single
Mode ...............................................................64
Table 27 Board Configuration of 2C6S Site in UMTS Single
Mode ...............................................................64
Table 28 Board Configuration in GSM/UMTS Dual Mode
(GSM:S4+UMTS:S1 or GSM:S2+UMTS:S2) ...........65
Table 29 Board Configuration in GSM/UMTS Dual Mode
(GSM:S8+UMTS:S2) ..........................................65
Table 30 Board Configuration in GSM/UMTS Dual Mode
(GSM:S4+UMTS:S4) ..........................................65
Table 31 Board Configuration in GSM/UMTS Dual Mode
(GSM:S4/4/4+UMTS:S1/1/1) ..............................66
Table 32 Board Configuration in GSM/UMTS Dual Mode
(GSM:S2/2/2+UMTS:S2/2/2) ..............................66
Table 33 Board Configuration in GSM/UMTS Dual Mode
(GSM:S6/6/6+UMTS:S3/3/3) ..............................66
Table 34 Board Configuration in GSM/UMTS Dual Mode
(GSM:S8/8/8+UMTS:S2/2/2) ..............................67
Table 35 Board Configuration in GSM/UMTS Dual Mode
Hetero-Frequency Networking .............................67
Table 36 Communication Standards .....................................79
84 Confidential and Proprietary Information of ZTE CORPORATION
List of Glossary
Abis- Abis Interface between BSC and BTS- BSCBTS
BBU- BaseBand Unit-- Battery Backup Unit-
BSC- Base Station Controller-
BSS- Base Station Subsystem-
BTS- Base Transceiver Station-
CC- Control and Clock Module-
EDGE- Enhanced Data rates for GSM Evolution-
FA- FAN Module-
FS- Fabric Switch Module-
GSM- Global System For Mobile Communications-
Confidential and Proprietary Information of ZTE CORPORATION 85
ZXSDR BS8900 GU360 System Description
MS- Mobile Station-
PDM- PDM Subrack-
SA- Site Alarm Module-
uBPG- uTCA Baseband Processing board for GSM- uTCAGSM
Um interface- Um Interface-the interface of MS-BTS- Um
UMTS- Universal Mobile Telecommunication System-
86 Confidential and Proprietary Information of ZTE CORPORATION