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Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
Og003 dbs3900hardwarestructureissue2.0
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Og003 dbs3900hardwarestructureissue2.0
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Og003 dbs3900hardwarestructureissue2.0

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    • 1. 2008-03www.huawei.comHUAWEIConfidentialSecurity Level: Internal UseHUAWEI GSM DBS3900Hardware Structure
    • 2. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialDBS3900 is a distributed BTS solution developed by HuaweiTechnologies Co.,Ltd. Its baseband part and radio part can beinstalled independently so that it can be used to variousenvironments with wide coverage and low cost.
    • 3. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidential Know the functions and features of DBS3900 Master the Hardware structure and function of DBS3900 Familiar with the Typical configuration and cableconnection of DBS3900 Master the Network topologies of DBS3900
    • 4. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidential DBS3900 Electronic Documentation BBU3900 Quick Installation Guide RRU3004 Quick Installation Guide DBS3900 Deployment Guide
    • 5. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialChapter 1 DBS3900 System DescriptionChapter 1 DBS3900 System DescriptionChapter 2 DBS3900 Hardware StructureChapter 3 DBS3900 Typical ConfigurationChapter 4 DBS3900 Network Topologies
    • 6. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialLocationPSTNISDNPSPDNUm InterfaceDBS3900DBS3900DBS3900BTSOMCHLR/AUC/EIRBSCMSC/VLRSMC/VMA InterfaceMAPMAPTUP,ISUPMSMSMSMS: Mobile Station BTS: Base Transceiver Station BSC: Base Station ControllerHLR: Home Location Register AUC: Authentication Center EIR: Equipment Identity RegisterMSC: Mobile Switching Center VLR: Visitor Location Register SMC: Short Message CenterVM: Voice Mailbox OMC: Operation and Maintenance Center DBS : Distributed Base Station
    • 7. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialFunctions and Features Wide coverage, low cost Suitable for various environments, flexible installation Support PGSM900M 、 EGSM900 、 DCS1800M One RRU module can support 2 TRXs Support transmit diversity Support PBT Support four-way receive diversity over different RRU BBU support star, tree, chain and ring topology Calculate TA exactly Support GPRS and EGPRS
    • 8. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialFunctions and Features Support Omni-directional coverage and directional coverage One BBU can support 36TRX at most and 12 cells at most Support A5/3, A5/2, A5/1 encryption and decryption Support dynamic radio frequency management Cell broadcasting service and point-to-point short message Support mixed combining with BTS3012 Support -48VDC power input
    • 9. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialChapter 1 DBS3900 System DescriptionChapter 2 DBS3900 Hardware StructureChapter 2 DBS3900 Hardware StructureChapter 3 DBS3900 Typical ConfigurationChapter 4 DBS3900 Network Topologies
    • 10. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialAbbreviationRRU Remote Radio unitBBU Base Band unitGTMU Transmission& Timing& Management Unit for BBUUPEAUniversal power and Environment interface unitType A (-48v)BSBC Universal BBU Subrack Backplane Type C (2U)UBFA Universal BBU Fan Unit Type A (2U)UEIU Universal Environment Interface unitUELP Universal E1/T1 Lighting Protection unitUFLP Universal FE/GE Lighting Protection unitCPRI Common Protocol Radio InterfaceAPM Advanced Power ModuleIBBS Integrated Backup Battery SystemOFB Outdoor Facility Box
    • 11. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialSector 1 DBS3900 Hardware ComponentsSector 1 DBS3900 Hardware ComponentsSector 2 BBU3900 System StructureSector 3 RRU3004 System StructureSector 4 DBS3900 Typical Scenario
    • 12. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialDBS3900 The DBS3900 consists of the BBU3900 and the RRU3004. The BBU3900 is an indoor baseband unit. It provides physical interfaces forconnection with the BSC and RRU. It performs centralized management (OMand signaling processing) of the entire base station system and providesreference clock for the system. The RRU3004 is an outdoor remote RF unit. It processes baseband signalsand RF signals. The Local Maintenance Terminal (LMT) and Man-Machine Interactive (MMI)can implement the maintenance of the DBS3900 through the BBU3900.BBU3900RRU3004 RRU3004 RRU3004
    • 13. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialAPM30 Overview The APM30 provides –48 V DC powerand power backup for the distributedbase stations and mini base stations,and provides space for the userequipment. It also performs functionssuch as battery management andmonitoring, and lightning protection.1. Filler panel(1U)2. Power sub-rack (3 U)3. DC PDU(2U)4~8. Filler Panel(1U)9. Space for batteries (3U)
    • 14. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialOFB Overview OFB (Outdoor Facility Box)supports DC power inputand DC power distributionand can serve as a cabinetfor the transmissionequipment, provides 11Uinstallation space. Since it has no heatingsystem, the OFB is unableto adapt to low-temperatureenvironment. The OFB isapplicable to category Cenvironment.
    • 15. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialIBBS Overview As an auxiliary product for Huawei outdoor BTSs, theIntegrated Backup Battery System (IBBS) providesbackup power to meet the requirements for fast networkdeployment. Output: -48V DC. Backup power mode: serial or parallel connectionbetween batteries. Operating temperature: The IBBS cabinet is functioningnormally when the temperature is +55°C. Alarm system: It provide door control, smog andtemperature sensors. A maximum of 16 batteries of 12 V 100 Ah or 2 V 150Ah, four batteries in one group and four groups in theIBBS cabinet.
    • 16. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialSector 1 DBS3900 Hardware ComponentsSector 2 BBU3900 System StructureSector 2 BBU3900 System StructureSector 3 RRU3004 System StructureSector 4 DBS3900 Typical Scenario
    • 17. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialBBU3900 The BBU3900 is an indoor BTS control unit that enables interactionbetween the BTS and the BSC. The BBU3900 performs the following functions: Provides physical interfaces between the BTS and the BSC forinteraction. Provides CPRI ports for communication with the RRU3004. Provides the USB port for downloading the BTS software. Provides OM channels for connection to the LMT (or M2000). Processes UL and DL data. Provides centralized management on the entire DBS system, such asOM and signaling processing. Provides the reference clock for the entire system.
    • 18. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialLogical Structure of the BBU3900
    • 19. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialHardware Components of BBU3900 The typical power consumption of the BBU is 35 W. The weight of the BBU isn’t more than 12KG. Each BBU3900 supports a maximum of 36 TRXs, and 12 cells. The BBU is a small box with all the external ports on the front panel. The BBU3900 boards consist of the BSBC, UEIU, GTMU, and UELP; theBBU3900 modules consist of the UBFA and the UPEU.
    • 20. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialBSBC Board The BSBC is the backplane of the BBU. The BSBC provides eightboard slots, two power slots, and one fan slot. The universal BBU sub-rack backplane type C (2U) (BSBC) providesbackplane interfaces for communication between boards and suppliespower for boards. The GTMU is located in slots 5 and 6, slot 7 for a main control boardthat supports 3G, and other ports as common slots.
    • 21. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialGTMU Board The GSM transmission, timing, and management unit for BBU (GTMU)controls and manages the entire BTS. It provides interfaces related to thereference clock, power supply, OM, and external alarm collection. The GTMU performs the following functions: Controls, maintains, and operates the BTS Supports fault management, configuration management, performancemanagement, and security management Monitors the fan module and the power supply module Distributes and manages BTS clock signals Provides clock input for testing Provides the Ethernet port for terminal maintenance Supports four E1 inputs Provides the CPRI ports for communication with the RRU
    • 22. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialGTMU Board Ports on the GTMU PanelPort Type Cable DescriptionCPRI0–CPRI5DLCconnectorCPRI optical cablebetween the BBUand the RRUProvides the input and output of the optical signalsETH RJ45connectorCrossover cable(delivered with theequipment)Performs local maintenance and commissioningFE0 RJ45connector- A reserved port that performs the following function:Connects the BBU to a routing device in the equipment roomthrough the Ethernet cable to transmit network informationFE1 DLCconnector- A reserved port that performs the following function:Connects the BBU to a routing device in the equipment roomthrough the optical cable to transmit network informationUSB USBconnector- A reserved port that performs the following function:Automatically upgrades the software through the USB diskTST USBconnector- Tests the output clock signals with a testerE1/T1 DB26 maleconnectorE1/T1 cable of theBBUProvides the input and output of the four E1/T1 signalsbetween the GTMU and the UELP or between the GTMU andthe BSC
    • 23. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialGTMU Board LEDs on the GTMU PanelLED Color Status DescriptionRUN Green On The board is faulty.Off There is no power supply or the board is faulty.Blinking once/2s The board is operational.Blinking once/4s The OML link is abnormal.Blinking fourtimes/sThe board is loading software.ALM Red On A fault occurs in the running board.Off An alarm is not generated.ACT Green On The board is operational.Off The board is faulty.LIU0–LIU3 Green On A local E1/T1 alarm is generated.Blinking fourtimes/sA remote E1/T1 alarm is generated.Off This link is not used or the alarm is cleared.CPRI0-CPRI5 Green On The CPRI link is functional.Red On The reception of the optical module is abnormal and an alarmis triggered.
    • 24. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialGTMU Board DIP Switch of GTMUDIPswitchDIP status Description1 2SW1 ON ON The E1 impedance isset to 75 Ω.OFF ON The E1 impedance isset to 120 Ω.ON OFF The T1 impedance isset to 100 Ω.DIPswitchDIP status Description1 2 3 4SW2 ON ON ON ON The E1 cableis grounded.OFF OFF OFF OFF The E1 cableis notgrounded.DIPswitchDIP status Description1 2 3 4SW4 ON ON ON ON The E1 link can bebypassed.OFF OFF OFF OFF The E1 link cannot bebypassed.SW5 ON ON ON ON The E1 link cannot bebypassed.OFF ON ON OFF The E1 link of the Level1 cascaded BTS can bebypassed.ON OFF ON OFF The E1 link of the Level2 cascaded BTS can bebypassed.OFF OFF ON OFF The E1 link of the Level3 cascaded BTS can bebypassed.ON ON OFF OFF The E1 link of the Level4 cascaded BTS can bebypassed.OFF ON OFF OFF The E1 link of the Level5 cascaded BTS can bebypassed.
    • 25. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialUBFA Module The universal BBU fan unit type A (2U) (UBFA) communicates with theGTMU to regulate the temperature, adjust the fan speed, and reportalarms. The UBFA module is hot swappable.LED Color Status DescriptionSTATE Green Blinking twice persecondThe board is not securelyconnected. An alarm is notgenerated.Red On An alarm is generated.Green Blinking onceevery twosecondsThe board operates normally.
    • 26. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialUPEU Module The universal power and environment interface unit type A (–48 V) (UPEU)supports the –48 V DC power input, supplies power to the boards, modules,and fan in the BBU, and provides access to multiple environment monitoringsignals. Port Type DescriptionMON0 RJ45ConnectorProvides the input and output of theexternally collected environmentmonitoring signals to the GTMUaccording to the RS485 communicationsprotocolMON1 RJ45ConnectorReservedEXT-ALM0RJ45ConnectorTransmits the externally collectedenvironment monitoring signals to theGTMU through communications protocolrelated to the dry contactEXT-ALM1RJ45ConnectorReservedPWR 3V3PowerConnector–48V power input
    • 27. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialUEIU Board The universal environment interface unit (UEIU) supports multipleenvironment monitoring signals. The UEIU supports eight Booleanalarm signals and two RS485 environment monitoring signals. The UEIU is optional. It is configured when the environment interfacesare insufficient.Port Type DescriptionMON0 RJ45ConnectorProvides the input and output of theexternally collected environmentmonitoring signals to the GTMUaccording to the RS485communications protocolMON1 RJ45ConnectorReservedEXT-ALM0RJ45ConnectorTransmits the externally collectedenvironment monitoring signals to theGTMU through communicationsprotocol related to the dry contactEXT-ALM1RJ45ConnectorReserved
    • 28. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialUELP Board The universal E1/T1 lightning protection unit (UELP) provides lightningprotection for four E1/T1 signals.Port Type Cable DescriptionINSIDE DB25 male connector E1 transfer cableof the BBUTransfers the four E1/T1 signals between theUELP and the GTMUOUTSIDE DB26male connector E1/T1 cables ofthe BBUProvides the input and output of the fourE1/T1 signals between the BBU and the BSCDIP Switch DIP Status Description1 2 3 4SW1 OFF OFF OFF OFF Twisted-pair cable ( 100Ω T1 or 120Ω E1 )ON OFF ON OFF Coaxial cable ( 75Ω E1 ) UELP Board provides a DIP switch to set impedance of E1/T1.
    • 29. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialBBU Cables The BBU3900 cables are classified into the PGND cable, –48 V DCpower cable, E1/T1 cable, E1 transfer cable, RS485 environmentmonitoring signal cable, CPRI signal cable between the BBU and theRRU, and BBU monitoring signal cable. The cable connection relations of the BBU as following:
    • 30. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialBBU Cables The cables figure of the BBU-48VDC power cables E1 transfer cableFE cable CPRI optical cable
    • 31. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialBBU Cables The cables figure of the BBU(1)RJ45Connector(2) Cord endterminalMonitoring signal cable between the OFB and the BBUMonitoring signal cable between the APM and the BBU(1)RJ45Connector(2) Cord endterminal(3)OTConnector(4)Common3PINConnector
    • 32. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialSector 1 DBS3900 Hardware ComponentsSector 2 BBU3900 System StructureSector 3 RRU3004 System StructureSector 3 RRU3004 System StructureSector 4 DBS3900 Typical Scenario
    • 33. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialRRU3004 The RRU3004 is an outdoor remote RF unit. The functions of the RRU3004 are as follows: The direct IQ modulation technique, which is directly implemented in the transmitchannel, modulates the baseband signals into GSM RF signals. After being filteredand amplified, the RF signals are transmitted to the antenna for transmission,through the duplexer in the RF front-end unit. The uplink RF signals received from the antenna go through down-conversion,amplification, analog-to-digital conversion, matched filtering, Automatic GainControl (AGC), and then are sent to ASIC and DSP for demodulation anddecoding. Power regulation and Voltage Standing Wave Ration (VSWR) detection. Frequency synthesization and loopback test. Generation and recovery of the clock circuitry at the CPRI interface, and the alarmdetection.
    • 34. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialLogical Structure of the RRURXM_OUT:RRU RX main output for RRUcascadingRXD_IN:RRU RX diversity input for RRUcascading
    • 35. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialComponents of the RRU3004 An RRU3004 consists of two RRU modules. The RRU module has a modular structure. The external interfaces of the RRUmodule are located at the bottom of the module and in the cabling cavity. The weight of RRU3004 is 38Kg. The RRU3004 can be installed on a wall,stand, metal pole, or tower.
    • 36. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialRRU Module The RRU module has a bottom panel, a cabling cavity panel, and anarea attached with LEDs. Provides - 48VDC power supply.1 Bottom panel2 Cabling cavity panel3 LEDs
    • 37. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialRRU Module Ports of the RRU ModuleItem Label DescriptionBottom panel RX_IN/OUT Interconnection ports for RF signalsRET RET antenna portANT_TX/RXA RF TX/RX port AANT_TX/RXB RF TX/RX port BCabling cavitypanelRTN+ Power wire postNEG-TX RX CPRI_E Eastern optical portTX RX CPRI_W Western optical portEXT_ALM Alarm PortRST Hardware reset buttonTST VSWR Test button for VSWR alarmsTST CPRI Test button for the CPRI port
    • 38. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialRRU Module LEDs on the RRU ModuleLED Status MeaningRUN On The board is faulty.Off No power input is available.Blinking once every two seconds The board is operational.ALM On (blinking at high frequency) There is a fault related to the running board.Off No alarm is detected.ACT On Normal operationOff The connection with the BBU is not established.Blinking once every two seconds Only one logical transceiver is functional (including TRX mutual aid isimplemented).Blinking twice per second Local test statusVSWR TX_ACT On (green) No VSWR alarm is detected.Blinking once every two seconds (green) The board is operational.Blinking once every two seconds (red) A VSWR alarm is detected at the ANT_TX/RXA port.Blinking once per second (red) A VSWR alarm is detected at the ANT_TX/RXB port.On (red) A VSWR alarm is detected at the ANT_TX/RXA and ANT_TX/RXB ports.OPTW/E(westward/eastward CPRILED )On (green) The CPRI link is functional.On (red) The reception of the optical module is abnormal and an alarm istriggered.Blinking once every two seconds (red) The CPRI link is out of lock.Off The SFP module is out-of-position or the optical module is powered off.
    • 39. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialConnections of RRU Cables The RRU3004 has the following cables: PGND cable, power cable,AISG multi-wire cable, AISG extension cable, CPRI optical cable, RFjumpers, Boolean input cable, and cables for cascaded RRUs.
    • 40. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialConnections of RRU Cables The related cable’s figure of the RRURRU –48 V DC power cable RRU Power cable for cascaded RRU modulesSignal cable between the electricalports on cascaded RRU modulesCPRI optical cable
    • 41. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialConnections of RRU Cables The related cable’s figure of the RRUCascaded RF jumper Boolean input cableAISG multi-wire cable AISG extension cable
    • 42. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialSector 1 DBS3900 Hardware ComponentsSector 2 BBU3900 System StructureSector 3 RRU3004 System StructureSector 4 DBS3900 Typical ScenarioSector 4 DBS3900 Typical Scenario
    • 43. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialTypical Scenarios of the DBS3900 Scenario 1: BBU+RRU+APM+IBBS When the site provides only the AC power supply and a long-time backup powersupply is required, the installation scenario can be used. The BBU can be installed in the APM. The APM supplies -48 V DC power to the BBU andRRU. The IBBS can supply backup power to the BTS for a long time to ensure that the BTS stilloperates normally in the case of an AC power supply failure. The RRU can be installed on a stand, pole, wall, or tower.
    • 44. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialTypical Scenarios of the DBS3900 Scenario 2: BBU+RRU+APM+OFB When the site provides the AC power supply and the space in the APM isinsufficient, the installation scenario can be used. The OFB provides 5 U to 11 U transmission space in which transmission equipment orbatteries can be installed. The BBU can be configured in the APM. The APM supplies –48 V DC power to the BBUand RRU and also provides backup DC power.
    • 45. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialTypical Scenarios of the DBS3900 Scenario 3: BBU+RRU+OFB When there is no equipment room on site, the DC power supply is available, andthe backup power supply is not required, the installation scenario can be used. The BBU is installed in the OFB. The OFB supplies –48 V DC power to the BBU andRRU.
    • 46. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialChapter 1 DBS3900 System DescriptionChapter 2 DBS3900 Hardware StructureChapter 3 DBS3900 Typical ConfigurationChapter 3 DBS3900 Typical ConfigurationChapter 4 DBS3900 Network Topologies
    • 47. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialSector 1 RRU Work Mode IntroductionSector 1 RRU Work Mode IntroductionSector 2 RRU Typical Configuration
    • 48. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialInternal Principle of the RRU RRU consists of two TRXs and two duplexers, and the RRU can beconnected to the antenna directly. The RF jumper between cascaded RRU modules is used to connect theRX_IN/OUT ports of two RRU modules so that receiving diversity signalscan be transmitted between the two RRU modules.
    • 49. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialThe Antenna Configuration of the RRU Single antenna There is no receiving diversity or transmitting diversity. Single antenna and double receivers The RRU module has one TX/RX feeder and two way receiving diversities, one ofthe receiver is from the another RRU module of the RRU3004. Double antennas The RRU module has two TX/RX feeders and two way receiving diversities. Double antennas and four receivers Each RRU can have two TX/RX feeders, and two RRUs are combined to supportfour way receive diversity.
    • 50. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialRRU Power Mode M900 RRU Optional value: “30W”,“25W”,“15W”,“12W”. Default value: “15W”, RRU supports transmit combining or independency here,otherwise RRU supports transmit independency only. M1800 RRU Optional value :”20W”, “10W”. Default value: “10W”, RRU supports transmit combining or independency here,otherwise RRU supports transmit independency only.
    • 51. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialRRU Transmit Mode and Receive Mode RRU transmit mode Transmit combining or independency PBT Transmit diversity RRU receive mode Receive diversity Four way receive diversity
    • 52. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialCell Configuration of Single RRU S1 Configure only one TRX in one RRU. Optional TRX work mode: “Transmit combining or independency”, “PBT”,“Transmit diversity”, ”Receive diversity“, ”Four way receive diversity”. S2 Two TRXs of RRU are configured in a S2 cell. Optional TRX work mode: ” Transmit combining or independency “, ”Receivediversity”. S1/1 Two TRXs of RRU are configured in two S1 cells. Optional TRX work mode: ” Transmit combining or independency “, ” Receivediversity“. Actually, the TRX only have single receiving channel.
    • 53. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialCombination Solution of Two RRUs Two RRUs are combined to share receive and transmit channels so thatthe configuration is more flexible. In the following figure, the cablebetween CPRI_W and CPRI_E are used for the TRX baseband signalinterconnection, while RX_IN/OUT is only used for two way receivingdiversity between two RRUs.InterfaceProcessingUnitDUPDUPCPRI-ECPRI-WANTAANTBRX-INRX_OUTInterfaceProcessingUnitDUPDUPCPRI-ECPRI-WANTAANTBRX-INRX_OUT
    • 54. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialRRU Transmit Mode-Transmit Combiningor Independency In this mode, two TRXs of RRU are both work. In this mode, the system will work on the transmit independency or transmitcombining mode automatically, according to the power mode and antennamode. In transmit dependency mode, TRX0 occupies channel A while TRX1 occupieschannel B. In transmit combining mode, the combining signal are transmitted throughchannel A.
    • 55. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialRRU Transmit Mode-Transmit Combiningor Independency Transmit independency Transmit combiningInterfaceProcessingUnitDUPDUPCPRI-ECPRI-WANTAANTBInterfaceProcessingUnitDUPDUPCPRI-ECPRI-WANTAANTB
    • 56. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialRRU Transmit Mode-PBT In PBT mode, only the first TRX can work. PBT mode can improve the transmitting power to 40W. In PBT mode, downlink signal are transmitted through channel A.InterfaceProcessingUnitDUPDUPCPRI-ECPRI-WANTAANTB
    • 57. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialRRU Transmit Mode-Transmit Diversity In this mode, only the first TRX can work. Transmit diversity mode can improve signal the quality of downlink signal. In this mode, the signal from the first TRX will be divided to two channels andbe transmitted through channel A and channel B.InterfaceProcessingUnitDUPDUPCPRI-ECPRI-WANTAANTB
    • 58. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialRRU Receive Mode-Main and Diversity Receive diversity, RRU can work as double TRX mode. Each TRX can receive the signal from two feeders. In the following figure , the TRX gets the receiving signal from channel A andB of the single RRU. It is also possible for TRX to use the channel A receiver of the other RRU intwo RRUs combining solution.InterfaceProcessingUnitDUPDUPCPRI-ECPRI-WANTAANTBRX-INRX_OUTThe secondreceivingdiversitysignal maycome fromsecond RRU
    • 59. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialRRU Receive Mode-Four Way ReceiveDiversity In this mode, only the first TRX can work. The working TRX gets the uplink signal from four feeders of two RRUs. Only the antenna mode “Double Antennas, Four Receivers” can support “Fourway receive diversity”.InterfaceProcessingDUPCPRI-ECPRI-WANTAANTBRX-INRX_OUTInterfaceProcessingDUPCPRI-ECPRI-WANTAANTBRX-INRX_OUTThe other tworeceivingdiversitysignal comefrom secondRRU
    • 60. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialSector 1 RRU Work Mode IntroductionSector 2 RRU Typical ConfigurationSector 2 RRU Typical Configuration
    • 61. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialTypical Configuration 1 S1(Transmit Diversity or TransmitIndependency + Receive Mode Mainand Diversity ) Transmit mode should be set to“Transmit Independency or combining” Receive mode should be set to “Receivediversity”. Antenna mode should be set to” DoubleAntenna”. It also can be configured as non-ring. The maximum transmit power of RF port:M900: 30W/TRXM1800:20W/TRX.BBUCPRI5CPRI0 CPRI1RRUCPRI_ECPRI_WRX-in/outANT-TX/RXBANT-TX/RXAANT
    • 62. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialTypical Configuration 2 S1(Transmit Diversity + Receive ModeMain and Diversity ) Transmit mode should be set to“Transmitdiversity”. Receive mode should be set to“Receivediversity”. Antenna mode should be set to “Doubleantenna”. It also can be configured as non-ring. The maximum transmit power of RF port:M900: 20W/TRXM1800:15W/TRXBBUCPRI5CPRI0 CPRI1RRUCPRI_ECPRI_WRX-in/outANT-TX/RXBANT-TX/RXAANT
    • 63. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialTypical Configuration 3 S1(PBT + Receive Mode Main andDiversity ) Transmit mode should be set to “PBT”. Receive mode should be set to “Receivediversity”. Antenna mode should be set to “Doubleantenna”. It also can be configured as non-ring. The maximum transmit power of RF port:M900: 40W/TRXM1800:30W/TRXBBUCPRI5CPRI0 CPRI1RRUCPRI_ECPRI_WRX-in/outANT-TX/RXBANT-TX/RXAANT
    • 64. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialTypical Configuration 4 S2(Transmit Independency orCombining + Receive Mode Main andDiversity) Transmit mode should be set to “Transmitmode independency or combining”. Receive mode should be set to “Receivediversity”. Antenna mode should be set to “Doubleantenna”. It also can be configured as non-ring. The maximum transmit power of RF port:M900: 30W/TRXM1800:20W/TRXBBUCPRI5CPRI0 CPRI1RRUCPRI_ECPRI_WRX-in/outANT-TX/RXBANT-TX/RXAANT
    • 65. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialTypical Configuration 5 S2 (PBT + Receive Mode Mainand Diversity) Transmit mode should be set to“PBT”. Receive mode should be set to“Receive diversity”. Antenna mode should be set to“Single antenna and receivediversity”. The maximum transmit power ofRF port:M900: 40W/TRXM1800:30W/TRXRRUCPRI_ECPRI_WRX-in/outANT-TX/RXBANT-TX/RXAANTBBUCPRI5CPRI0 CPRI1RRUCPRI_ECPRI_WRX-in/outANT-TX/RXBANT-TX/RXA
    • 66. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialTypical Configuration 6 S2 (PBT + Four Way ReceiveDiversity) Transmit mode should be set to“PBT”. Receive mode should be set to “4way receive diversity”. Antenna mode should be set to“double antenna and 4 way receivediversity”. It also can be configured as non-ring. The maximum transmit power ofRF port:M900: 40W/TRXM1800:30W/TRXRRUCPRI_ECPRI_WRX-in/outANT-TX/RXBANT-TX/RXAANTBBUCPRI5CPRI0 CPRI1RRUCPRI_ECPRI_WRX-in/outANT-TX/RXBANT-TX/RXAANT
    • 67. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialTypical Configuration 7 S4 (Transmit Combining +Receive Mode Main andDiversity) Transmit mode should be set to“Transmit combining orindependency” Receive mode should be set to“Receive diversity” Antenna mode should be set to“Single antenna and two receive” The maximum transmit power ofRF port:M900: 15W/TRXM1800:10W/TRXRRUCPRI_ECPRI_WRX-in/outANT-TX/RXBANT-TX/RXAANTBBUCPRI5CPRI0 CPRI1RRUCPRI_ECPRI_WRX-in/outANT-TX/RXBANT-TX/RXA
    • 68. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialTypical Configuration 8 S8(Transmit Combining + ReceiveMode Main and Diversity) Transmit mode should be set to“Transmit combining orindependency”. Receive mode should be set to“Receive diversity”. Antenna mode should be set to“Single antenna and two receive”. Actually It is combined by two S4. The maximum transmit power of RFport:M900: 15W/TRXM1800:10W/TRXANT-TX/RXACPRI5CPRI0CPRI1ANTBBURRUCPRI_ECPRI_WRX-in/outANT-TX/RXBANT-TX/RXARRUCPRI_ECPRI_WRX-in/outANT-TX/RXBANTRRUCPRI_ECPRI_WRX-in/outANT-TX/RXBANT-TX/RXARRUCPRI_ECPRI_WRX-in/outANT-TX/RXBANT-TX/RXA
    • 69. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialChapter 1 DBS3900 System DescriptionChapter 2 DBS3900 Hardware StructureChapter 3 DBS3900 Typical ConfigurationChapter 4 DBS3900 Network TopologiesChapter 4 DBS3900 Network Topologies
    • 70. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialDBS3900 Network Topologies Network Topologies of the BBU The BSC and BBUs support multiple network topologies: star, chain, tree, and ring. E1/T1 can be used to connect BBU and BSC, or interconnect transmissionequipment, optical fiber and FE cable can be used to connect BBU and Router. Network Topologies of the RRU The BBU and RRUs support two network topologies: star and chain. RRU connect with BBU by optical fiber.
    • 71. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialNetwork Topologies of the BBU The BSC and BBUs support multiple network topologies: star, chain,tree, and ring.
    • 72. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialNetwork Topologies of the RRU The BBU and RRUs support two network topologies: star and chain.
    • 73. HUAWEITECHNOLOGIES Co., Ltd. HUAWEIConfidentialSummary DBS3900 function and features. DBS3900 hardware structure, include BBU and RRU etc. The work mode and typical configuration of the RRU. Network Topologies of the BBU and RRU.
    • 74. Thank Youwww.huawei.com

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