OME501101 HUAWEI BTS3900 Hardware Structure ISSUE1.0.ppt

HUAWEI BTS3900Hardware Structure www.huawei.com Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Foreword  The BTS3900 developed by Huawei is an indoor macro BTS. The BTS3900 mainly consists of the BBU and DRFUs. Compared with traditional BTSs, the BTS3900 features simpler structure and higher integration  In this slide, we will mainly introduce the hardware system structure, application scenarios, basic functions of modules, networking mode and typical configuration of the BTS3900. Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page2 References  《 BTS3900 System Description 》  《 BTS3900 Hardware Description 》 Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page3 Objectives  Upon completion of this course. you will be able to:  Know the application scenarios of BTS3900  Grasp the hardware structure of BTS3900  Grasp the functions of the modules  Master typical configuration of BTS3900  Know the networking topology of BTS3900 Copyright © 2006 Huawei Technologies Co.. Page4 . All rights reserved. Ltd. Ltd.4 Other boards and modules  2.2 Typical configuration  3.4 Topology configuration  3. Configurations of the BTS3900  3.3 RF cable connection  3. BTS3900 Hardware Components  2..Contents 1.5 Cables connection of the cabinet 3.5 Configuration principles Copyright © 2006 Huawei Technologies Co.1 Work modes in BTS3900 configuration  3.3 Power supply system of BTS3900  2. Page5 .1 BTS3900 basic structure  2. BTS3900 Overview 2. All rights reserved.2 BBU hardware structure  2. .Contents 1. BTS3900 Overview 2. All rights reserved. Page6 . Ltd. Configurations of the BTS3900 Copyright © 2006 Huawei Technologies Co. BTS3900 Hardware Components 3. Ltd. All rights reserved. Page7 ..Location of BTS3900 Um Interface MS BTS3900 BSC A Interface MS MSC/VLR M AP MAP BTS3900 HLR/AUC/EIR BTS3900 MS BTS3900 PSTN ISDN PSPDN TUP.ISUP SMC/VM OMC MS: Mobile Station BTS: Base Transceiver Station BSC: Base Station Controller HLR: Home Location Register AUC: Authentication Center EIR: Equipment Identity Register MSC: Mobile Switching Center VLR: Visitor Location Register SMC: Short Message Center VM: Voice Mailbox OMC: Operation and Maintenance Center Copyright © 2006 Huawei Technologies Co. Page8 . All rights reserved..Some Functions and Features  It adopts the unified BTS platform developed by Huawei Wireless and enables the smooth evolution from 2G to 3G  It supports the Abis IP/FE interface in hardware and enables Abis over IP through software upgrade if required  It shares the BBU. with the DBS3036 to minimize the number of spare parts and reduce the cost  It can be flexibly installed in a small footprint and easily maintained with low cost  It supports transmit diversity and PBT  It supports 2-antenna and 4-antenna receive diversity to improve the uplink coverage  It supports the GPRS and EGPRS Copyright © 2006 Huawei Technologies Co. Ltd. which is the central processing unit. chain. A5/2. and A5/1 encryption and decryption algorithms  It supports coexistence with the BTS3012  A single cabinet supports up to 12 carriers in the maximum cell configuration of S4/4/4  Multiple cabinets support up to 72 carriers in the maximum cell configuration of S24/24/24  Receiver sensitivity on TCH/FS is -113 dBm Copyright © 2006 Huawei Technologies Co. ring. such as star. All rights reserved.Some Functions and Features  It supports the hierarchical cell. and hybrid topologies  It supports the A5/3. and micro cell  It supports multiple network topologies. Page9 .. Ltd. tree. concentric cell. BTS3900 Hardware Components 3. All rights reserved.Contents 1.. Page10 . Configuration of the BTS3900 Copyright © 2006 Huawei Technologies Co. BTS3900 Overview 2. Ltd. 3 Power supply system of BTS3900  2.2 BBU hardware structure  2.5 Cables connection of the cabinet Copyright © 2006 Huawei Technologies Co.4 Other boards and modules  2.Contents  2. Page11 . BTS3900 Hardware Components  2. All rights reserved.. Ltd.1 BTS3900 basic structure  2. All rights reserved. Page12 .Structure of the BTS3900 Cabinet 1) 2) 3) 4) 5) Double radio filter unit Fan box GSM antenna and TMA control module Baseband unit Direct current distribution unit -48V Cabinet Copyright © 2006 Huawei Technologies Co. Ltd.. Ltd.Structure of the BTS3900 Cabinet (1) Double radio filter unit (2) Fan box (3) Baseband unit (4) Direct current distribution unit (5) Cable in/out unit (6) Power supply unit +24V or +220V Cabinet Copyright © 2006 Huawei Technologies Co.. Page13 . All rights reserved. . Page14 . All rights reserved. Ltd.Abbreviations Board/ module Full Name Quantity Full Configuration Minimum Configuration BSBC Universal BBU Subrack Backplane type C (2U) 1 1 UEIU Universal Environment Interface Unit 1 0 GTMU GSM Transmission and Management Unit for BBU 1 1 UELP Universal E1/T1 Lightning Protection Unit 1 0 UBFA Universal BBU Fan unit type A (2U) 1 1 UPEU Universal Power and Environment interface Unit 2 1 DRFU Double Radio Filter Unit 6 1 DCDU Direct Current Distribution Unit 1 1 GATM GSM Antenna and TMA Control Module 1 0 DPMU Power and Environment Monitoring Unit 1 0 PSU(AC/DC) Power Supply Unit (AC/DC) 3 0 PSU(DC/DC) Power Supply Unit (DC/DC) 4 0 Fan box Fan box 1 1 Copyright © 2006 Huawei Technologies Co. Page15 ..Logical Structure and Signal Flow Copyright © 2006 Huawei Technologies Co. Ltd. All rights reserved. . Ltd. Page16 .Stack Mode  When two BTS3900 cabinets (-48 V) are stacked. the BBU is installed only in the lower cabinet and serves as the baseband control unit for the two cabinets Copyright © 2006 Huawei Technologies Co. All rights reserved. a maximum of nine DRFUs can be configured  When two cabinets are stacked.Stack Mode  When the BTS3900 cabinet (-48 V) is stacked on the BTS3900 cabinet (220 V or +24V). Ltd. Page17 . All rights reserved.. the BBU is installed only in the lower cabinet and serves as the baseband control unit for the two cabinets Copyright © 2006 Huawei Technologies Co. BTS3900 Hardware Components  2..2 BBU hardware structure  2. Ltd.1 BTS3900 basic structure  2.4 Other boards and modules  2.5 Cables connection of the cabinet Copyright © 2006 Huawei Technologies Co.Contents  2. All rights reserved. Page18 .3 Power supply system of BTS3900  2. .4 V DC to –57 V DC Copyright © 2006 Huawei Technologies Co. Page19 . All rights reserved. Ltd.  All the boards can be inserted from the front panel  The Permissible range of power input is –38.BBU  The typical power consumption of BBU is 35W  The weight of the BBU is 12 kg at most. . Ltd. Page20 .Working Principles of the BBU Copyright © 2006 Huawei Technologies Co. All rights reserved. Ltd.. Page21 .Boards and Modules in BBU  BSBC: The universal BBU subrack backplane type C  GTMU: The GSM Transmission. All rights reserved. Timing and Management Unit  UBFA: The universal BBU fan unit type A  UPEU: The universal power and environment interface unit  UELP: The universal E1/T1 lightning protection unit  UEIU: The universal environment interface unit Copyright © 2006 Huawei Technologies Co. the GTMU is located in slots 5 and 6  Provide backplane interfaces.. from the view of the front panel. Page22 . The GTMU is 1 U high. and slots 0 to 4 as common slots. distribute clock signal and +12V power supply for the other boards Copyright © 2006 Huawei Technologies Co. Therefore. communication channels.BSBC Board  The BSBA provides slot 6 for the GTMU. Ltd. All rights reserved. slot 7 for a main control board that supports 3G. Page23 .GTMU  Controls. maintains.. All rights reserved. and operates the BTS  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 DRFU Copyright © 2006 Huawei Technologies Co. Ltd. GTMU Ports Port Type Corresponding Cable Description CPRI0 ～ CPRI5 DLC Optical fiber between BBU and DRFU Connected to DRFU for the optical signal transmission ETH RJ45 Special Ethernet cable Terminal maintenance and commissioning FE0 RJ45 Ethernet cable A reserved port that performs the FE1 DLC Optical fiber following function: Connects the BBU to a routing device in the equipment room through the Ethernet cable for transmission USB USB - A reserved port that performs the following function: Automatically upgrades the software through the USB disk TEST USB - Tests the output clock signals with a tester E1/T1 DB26 male BBU E1/T1 Provides the input and output of the four Page24 the GTMU and the E1/T1 signals between Copyright © 2006 Huawei Technologies Co. Ltd. .. All rights reserved. 0.125s Board is loading software of) Red On A fault occurs in the running board. Of No fault On The board is operational.125s E1/T1 remote alarm of) Green Of Not used or alarm has disappeared On CPRI link is functional On Technologies Co.125s on. CPRI link is abnormal Copyright © Red 2006 Huawei Page25 .125s on.GTMU Indicators Indicato r RUN ALM ACT LIU0~LI U3 CPRI0~ CPRI5 Color Status Description Green On Board has fault Green Of Not power input or the board is faulty Green Slow flash(1s on ， 1s of) The board is operational. Green Slow flash (2s on ， 2s of) OML is abnormal Green Fast flash (0.. All rights reserved. Ltd. Of Board has fault On E1/T1 local alarm Green Green Fast flash (0. 0. The UBFA module is hot swappable Indicato r STATE Color Status Description Green Fast Can not flash(0. All rights reserved. Ltd. thus cooling the entire cabinet  The UBFA module communicates with the GTMU to regulate the temperature.25s of) the board and there is no alarm generated Red On Green Slow flash(1s on.. 1s of) Copyright © 2006 Huawei Technologies Co. There is alarm Runs normally Page26 . and report alarms.UBFA  The universal BBU fan unit type A (2U) (UBFA) works with the air inlet box of the cabinet to form a ventilation circuit.25s communicate with on ， 0. adjust the fan speed. and fan in the BBU. Ltd. modules.. supplies power to the boards. and provides access to multiple environment monitoring Port signals Type Description MON 0 RJ45 Provides the input and output of the externally collected environment monitoring signals to the GTMU according to the RS485 communications protocol MON 1 RJ45 Reserved EXTALM0 RJ45 Transmits the externally collected environment monitoring signals to the GTMU through communications protocol related to the dry contact EXTALM1 RJ45 Reserved PWR 3V3 Copyright © 2006 Huawei Technologies Co.UPEU  The universal power and environment interface unit type A (–48 V) (UPEU) supports the –48 V DC power input. Page27 -48V DC input . All rights reserved. ALM1 Ltd. Page28 .UEIU  UEIU is the environment interface board of BBU ， it can support multi-route monitoring signal input  UEIU is optional and is only used when more ports are needed Port Type Description MON 0 RJ45 Provides the input and output of the externally collected environment monitoring signals to the GTMU according to the RS485 communications protocol MON 1 RJ45 Reserved EXTALM0 RJ45 Transmits the externally collected environment monitoring signals to the GTMU through communications protocol related to the dry contact EXTRJ45 Reserved Copyright © 2006 Huawei Technologies Co. All rights reserved.. .UELP  UELP is the E1/T1 signal lightening protection unit of BBU and it can provide protection for 4 route E1/T1 signal Port INSIDE Type Relative cables Description DB25 male E1 transferring cable Transfers the four E1/T1 signals between the UELP and the GTMU OUTSIDE DB26 male E1/T1 cable Provides the input and output of the four E1/T1 signals between the BBU and the BSC Copyright © 2006 Huawei Technologies Co. All rights reserved. Ltd. Page29 . 3 Power supply system of BTS3900  2. BTS3900 Hardware Components  2.1 BTS3900 basic structure  2. All rights reserved.5 Cables connection of the cabinet Copyright © 2006 Huawei Technologies Co. Page30 .. Ltd.2 BBU hardware structure  2.Contents  2.4 Other boards and modules  2. All rights reserved.. Page31 . Ltd.DCDU Panel a: Power switch b: Power output ports Copyright © 2006 Huawei Technologies Co. Ltd. All rights reserved.Main Functions of DCDU  The functions of the DCDU    Receiving -48 V DC power input Distributing the -48 V DC power of 10 outputs for boards and modules in the cabinet Providing surge protection of 10 kA in diferential mode and 15 kA in common mode and providing dry contact for surge protection failure Copyright © 2006 Huawei Technologies Co. Page32 .. and RFU5RFU0 Power switch controlling the 10 outputs for the BBU. SPARE1. GATM. Ltd. DRFU. BBU. BBU. and RFU5RFU0 Power ports supplying the 10 outputs of power to the BBU. and fan box Power switch SPARE2..Ports and Switches of DCDU Name Power input terminal Label Description NEG(-) DCDU low level input terminal RTN(+) DCDU high level input terminal Power output port SPARE2. Page33 . DRFU. SPARE1. FAN. GATM. FAN. and fan box Alarm output port SPD ALM Dry contact alarm output port Copyright © 2006 Huawei Technologies Co. All rights reserved. LOAD2(-).DPMU and PSU  The wiring unit is connected to the external power supply through the terminals for L and N wires. and RTN(+) 1) DPMU 2) PSU 3) Wiring unit Copyright © 2006 Huawei Technologies Co. Page34 . Ltd.. and leads the power to the PSU through the backplane  The PSU converts the input power into the -48 V DC power  The DPMU monitors the operating status of the PSU  The wiring unit provides -48 V DC power outputs through LOAD1(-). All rights reserved. Ltd. and input overvoltage/undervoltage protection). alarms related to module protection (such as overtemperature protection.. All rights reserved. and fan faults).Main Functions of PSU  There are 2 kinds of Power Supply Unit (PSU). and power failure alarm Copyright © 2006 Huawei Technologies Co. AC/DC PSU converts 220V to -48V. Page35 . AC/DC and DC/DC. DC/DC PSU converts +24V to -48V  The AC/DC and DC/DC PSU monitor alarms related to module faults (such as output overvoltage. no output. Ltd. All rights reserved. upon input undervoltage/overvoltage or overtemperature Off Normal On Irrecoverable fault occurs inside the PSU. the fault can be output overvoltage. Page36 .LEDs of PSU Input LED (top) Green Power protection LED (middle) Yellow Power failure LED (bottom) Red On Normal Off There is no AC power input or the fuse is damaged Off Normal On Power protection for the PSU is being triggered. or fan fault Copyright © 2006 Huawei Technologies Co. For example. no outputs.. for example. Main Functions of PMU  The power and environment monitoring unit (DPMU)  Communicates with the central processing unit through the RS232/RS422 serial port  Manages the power system and the battery charging and discharging  Detects and reports water damage alarms.. reports humidity and temperature. and also reports dry contact alarms Copyright © 2006 Huawei Technologies Co. and standby Boolean value alarms. Page37 . battery temperature. door status alarms. All rights reserved. Ltd. smoke alarms. and standby analog values  Detects power distribution and reports alarms. 5. Ltd. Page38 . 2. LEDs Power supply test ports RS232/RS422 ports Battery control switch COM port Copyright © 2006 Huawei Technologies Co. which are used for switching on and switching off the battery Press and hold the port ON for 5-10 seconds to switch on the battery Press and hold the port OFF for 5-10 seconds to switch off the battery Power supply test port Two power supply test holes -48V and 0V are available for measurement through an ordinary multimeter COM port Backplane port Used in connection to the external signal transfer board Used in connection to the backplane 1.. 4. 3.Ports of PMU Ports RS232/RS422 port Function Used in communication with the central processing unit Battery switch The battery switch has two control ports ON and OFF. All rights reserved. +24 V DC. The external -48 V DC power input is directly connected to the power input terminals on the DCDU (10 outputs). no additional power system is required. Ltd. Page39 . and 220 V AC  If the external -48 V DC power input is used. All rights reserved. -48 V DC. the DCDU distributes the -48 V DC power to each module in the cabinet Copyright © 2006 Huawei Technologies Co..Power Distribution Mode 1  The BTS3900 cabinet can use three types of power inputs. Then. namely. . The PSUs convert the external power into the -48 V DC power and supply the -48 V DC power to the DCDU Then.Power Distribution Mode 2  When the external +24 V DC power or +220V AC power is used. PSUs and a cable in/out unit are configured in the cabinet. Page40 . the DCDU distributes the -48 V DC power to each module in the cabinet Copyright © 2006 Huawei Technologies Co. All rights reserved. Ltd. Page41 . All rights reserved. The PSUs convert the external +24 V DC or +220VAC power into the -48 V DC power and supply -48 V DC power to the DCDUs in both cabinets. the DCDUs distribute the -48 V DC power to the modules in both cabinets Copyright © 2006 Huawei Technologies Co.. Then. Ltd.Power Distribution Mode 3  This is the power distribution when a -48 V DC cabinet is stacked on a +24 V DC cabinet or +220V AC cabinet. Page42 .4 Other boards and modules  2. BTS3900 Hardware Components  2.. All rights reserved.2 BBU hardware structure  2. Ltd.5 Cables connection of the cabinet Copyright © 2006 Huawei Technologies Co.Contents  2.1 BTS3900 basic structure  2.3 Power supply system of BTS3900  2. . All rights reserved. The GATM is optional  Controls the RET antenna  Feeds power to the TMA  Reports the RET control alarm signals  Monitors the current from the feeder Copyright © 2006 Huawei Technologies Co.Main Functions of GATM  The GSM antenna and TMA control module (GATM) is a module that controls the antenna and TMA. Page43 . Ltd. Ltd..Ports on the GATM Ports Connector Function ANT0 SMA female Providing power for the RET antenna and transmitting control signals for the RET antenna ANT1 SMA female Providing power for the antenna ANT2 SMA female Providing power for the RET antenna and transmitting control signals for the RET antenna ANT3 SMA female Providing power for the antenna ANT4 SMA female Providing power for the RET antenna and transmitting control signals for the RET antenna ANT5 SMA female Providing power for the antenna COM1 RJ45 Used in connection to the BBU COM2 RJ45 Providing the extended RS485 port to be cascaded with other devices -48 V 7W2 Receiving the -48 V power input Copyright © 2006 Huawei Technologies Co. All rights reserved. Page44 . . Indicator of the service running status On The AISG link is normal. such as an overcurrent alarm. Blinking once every two seconds The board is running normally and the communication with the BBU is normal. Page45 . Ltd.LEDs on the GATM LED Color RUN Green ACT ALM Green Red Description Status Meaning Blinking once every four seconds There is power supply but the communication with the BBU is abnormal. Off The module runs normally. Alarm indicator On An alarm is generated. Off The AISG link is abnormal. All rights reserved. Off There is no power supply or the module is faulty. Blinking frequently and irregularly The AISG link is transmitting data. Indicator of the board running status Copyright © 2006 Huawei Technologies Co. Page46 .Features and Functions of Fan Box Provides forced ventilation and dissipation for the cabinet   Supports two modes of adjusting the rotation speed of the fans: adjustment based on the temperature and adjustment controlled by BBU  Detects the temperature  Communicates with BBU unit to report alarms and the adjusted rotation speed of the fans to BBU  Stops the rotation of the fans when the ambient temperature is low  A fan box is configured with one NFCB and four fans. Ltd. All rights reserved. When one fan fails. the other fans rotate at full speed Copyright © 2006 Huawei Technologies Co. The fans are configured in N+1 mode.. Off No alarm is generated. Blinking once every two seconds An alarm is generated. All rights reserved.Connectors and LEDs of Fan Box Type Silk-Screen Connector Power port -48 V 7W2 Used to introduce the -48 V DC power Temperature sensor port SENSOR RJ45 Used in connection to the external temperature sensor Communication port COM OUT RJ45 Used in connection to the lower-level cascaded fan box COM IN RJ45 Used in communication with the central processing unit LED Color RUN Green ALM Red Description Status Description Blinking four times per second The communication with the central processing unit is not established but the module runs normally. Blinking once every two seconds The communication with the central processing unit is established and the module runs normally. Off There is no power input and the module is faulty. Ltd. Page47 . Copyright © 2006 Huawei Technologies Co.. and combines and divides signals Copyright © 2006 Huawei Technologies Co. Page48 . Ltd. processes data.Main Functions of DRFU  One double radio filter unit (DRFU) provides two TRXs  The DRFU performs modulation and demodulation between baseband signals and RF signals. All rights reserved.. power amplifier. and dualduplexer Copyright © 2006 Huawei Technologies Co. signal processing unit.. Page49 . All rights reserved. Ltd.Working Principles of the DRFU  The DRFU consists of the high-speed interface unit. so that it can support the diversity receiving between 2DRFUs CPRI-W Interface Processing Unit CPRI-E DUP DUP ANTA ANTB RX-IN RX_OUT Copyright © 2006 Huawei Technologies Co.. Ltd. All rights reserved.DRFU Internal Structure  2 TRXs and 2 duplexers are integrated in DRFU module which can be connected to antenna directly  The RX_IN/OUT port of DRFU can support the receiving signal interconnection between 2 DRFUs. Page50 . Page51 . or in connection to the upper-level cascaded DRFU CPRI1 Used in connection to the lower-level cascaded DRFU RX1 in Input port for diversity signals in antenna channel 1 RX1 out Output port of diversity signals in antenna channel 1 RX2 in Input port for diversity signals in antenna channel 2 RX2 out Output port of diversity signals in antenna channel 2 PWR Receives power input QMA female connector 7W2 power connector Used in connection to the antenna subsystem ANT2 Copyright © 2006 Huawei Technologies Co. Ltd.. All rights reserved.Ports of the DRFU Type Port for transmitting and receiving RF signals CPRI port Port for transmitting RF signals between DRFUs Power port Connector Ports Description N female connector ANT1 SFP female connector CPRI0 Used in connection to the BBU. but the BBU is faulty Off There is no power supply or the module is faulty Blinking once every two seconds The module is functional Blinking four times per second The module is loading software or is not started On A fault alarm is generated Off No alarm is generated On The module is functional and is correctly connected to the BBU Off The connection with the BBU is not established Blinking once every two seconds The DRFU is being tested on the Site Maintenance Terminal Copyright © 2006 Huawei Technologies Co. All rights reserved. Ltd..LEDs of the DRFU LED RUN ALM ACT Status Meaning On The power input is normal. Page52 . LEDs of the DRFU VSWR CPRI0 CPRI1 Off (red) No VSWR alarm is detected. Blinking once every two seconds (red) The CPRI link has a loss-of-lock error. On (red) The interface module fails to receive signals. On (green) The CPRI link is functional. On (red) The interface module fails to receive signals. On (red) The VSWR alarm is generated on only the ANT1 port. Blinking once every two seconds (red) The VSWR alarm is generated on only the ANT2 port. On (green) The CPRI link is functional. All rights reserved. Blinking four times per second (red) The VSWR alarms are generated on the ANT1 and ANT2 ports. Copyright © 2006 Huawei Technologies Co.. Blinking once every two seconds (red) The CPRI link has a loss-of-lock error. Page53 . Ltd. Ltd. All rights reserved.5 Cables connection of the cabinet Copyright © 2006 Huawei Technologies Co.1 BTS3900 basic structure  2.. Page54 .Contents  2. BTS3900 Hardware Components  2.4 Other boards and modules  2.3 Power supply system of BTS3900  2.2 BBU hardware structure  2. . Page55 . All rights reserved.Cable Connection of -48V Cabinet Cable Number Cable Name Qua ntity R1-R12 RF Jumpers 12 P1-P2 External Power Cables (-48 V) 2 P3-P8 Power Cables Between the DCDU and DRFUs 6 P9 Power Cable Between the DCDU and Fan Box 1 P10 Power Cable Between the DCDU and BBU 1 P11-P12 Reserved 2 S1-S6 CPRI Signal Cables Between the BBU and DRFU 6 S7 E1 Transfer Cable of the BBU 1 S8 Monitoring Signal Cables for the DCDU 1 S9 Monitoring Signal Cable for the Fan Box 1 S10 E1/T1 Cable of the BBU 1 Copyright © 2006 Huawei Technologies Co. Ltd. Ltd.Cable Connection of +24V Cabinet Cable Name Cable number Qua ntity R1-R12 RF Jumpers 12 P1–P2 Power Cables Between the PSU (DC/DC) and DCDU 2 P3-P8 Power Cables Between the DCDU and DRFUs 6 P9 Power Cable Between the DCDU and Fan Box 1 P10 Power Cable Between the DCDU and the BBU 1 P11-P12 Reserved 2 P13-P14 External Power Cables (+24 V) 4 S1-S6 CPRI Signal Cables Between the BBU and DRFU 6 S7 E1 Transfer Cable of the BBU 1 S8 Monitoring Signal Cables for the DCDU 1 S9 In-Position Signal Cable for the PSU (DC/DC) 1 S10 Monitoring Signal Cable for the Fan Box 1 S11 E1/T1 Cable of the BBU 1 Copyright © 2006 Huawei Technologies Co. Page56 .. All rights reserved. .Cable Connection of +220V Cabinet Cable Number Cable Name Qua ntity R1-R12 RF Jumpers 12 P1–P2 Power Cables Between the PSU (AC/DC) and the DCDU 2 P3-P8 Power Cables Between the DCDU and the DRFUs 6 P9 Power Cable Between the DCDU and the Fan Box 1 P10 Power Cable Between the DCDU and the BBU 1 P11-P12 Reserved 2 P13-P14 External Power Cables (220 V) 2 S1-S6 CPRI Signal Cables Between the BBU and DRFU 6 S7 E1 Transfer Cable of the BBU 1 S8 Monitoring Signal Cable for the DPMU 1 S9 Monitoring Signal Cables for the DCDU 1 S10 Monitoring Signal Cable for the Fan Box 1 S11 E1/T1 Cable of the BBU 1 Copyright © 2006 Huawei Technologies Co. Page57 . All rights reserved. Ltd. All rights reserved.Contents 1. Configuration of the BTS3900 Copyright © 2006 Huawei Technologies Co. BTS3900 Overview 2. Ltd. BTS3900 Hardware Components 3. Page58 .. All rights reserved.5 Configuration principles Copyright © 2006 Huawei Technologies Co.1 Work modes in BTS3900 configuration  3.2 Typical configuration  3. Ltd.. Configuration of the BTS3900  3.4 Topology configuration  3. Page59 .Contents  3.3 RF cable connection  3. All rights reserved.Antenna Modes  Single antenna   Single antenna. double receivers   The DRFU module has 1 working TX/RX feeder and 2 way receive diversity. Ltd. 4 receivers  The DRFU has 2 working TX/RX feeders and 4 way receive diversity Copyright © 2006 Huawei Technologies Co.. one of the receiver is from the another DRFU Double antennas   The DRFU module has 1 working feeder so there is no receive diversity or transmit diversity The DRFU module has 2 working TX/RX feeders and 2 way receive diversity Double antennas. Page60 . Ltd.DRFU Output Power in the BTS3900 Operating Frequency Band Work Mode Output Power (GMSK/8PSK) 900 MHz Non-combination 45 W/30 W 900 MHz Combination 20 W/14 W 900 MHz PBT 71 W/47 W 1800 MHz Non-combination 40 W/26 W 1800 MHz Combination 18 W/12 W 1800 MHz PBT 63 W/42 W Copyright © 2006 Huawei Technologies Co.. Page61 . All rights reserved. . Ltd.DRFU Transmit Mode and Receive Mode   DRFU transmit mode  Transmit independency or combining  PBT  Dynamic PBT  Transmit diversity DRFU receive mode  Two way receive diversity  Four way receive diversity Copyright © 2006 Huawei Technologies Co. Page62 . All rights reserved. Transmit Independency or Combining  In transmit independency or combining mode, the system decides which mode will work actually  In independency mode, TRX 0 occupies channel A while TRX1 occupies channel B CPRI-W Interface Processing Unit CPRI-E Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. ANTA DUP ANTB DUP Page63 Transmit Independency or Combining  In transmit independency or combining mode, the system decides which mode will work actually  In transmit combining mode ， the two TRXs will be combined and transmitted through channel A CPRI-W Interface Processing Unit CPRI-E Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. ANTA DUP ANTB DUP Page64 PBT  In PBT mode, only the first TRX can work  PBT mode can improve the transmitting power  In PBT mode ， only channel A is used by downlink signal CPRI-W Interface Processing Unit CPRI-E Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. ANTA DUP ANTB DUP Page65 (The former subscriber in the secondary TS will handover) When the quality is higher than a threshold.Dynamic PBT  Dynamic PBT is a mode based on the operation of timeslots.. it brings the balance between capacity and coverage and does not cause the 50% decrease of capacity  The subscriber occupies a TS under the detection of measure report. the PBT will be canceled and the secondary TS will be released Copyright © 2006 Huawei Technologies Co. All rights reserved. the same No. compared with static PBT. Ltd. When the quality is lower than a threshold. Page66 . of TS of the adjacent TRX will be used as the secondary TS by the subscriber to start PBT. Dynamic PBT Timeslots TRXs Poor quality Good quality No signal Signal quality Copyright © 2006 Huawei Technologies Co.. All rights reserved. Ltd. Page67 . Transmit Diversity  In this mode. ANTA DUP ANTB DUP Page68 . only the first TRX can work  Transmit diversity mode improves the quality of downlink signal  In this mode ， the signal from the first TRX is divided to 2 channels and be transmitted through channel A and channel B CPRI-W Interface Processing Unit CPRI-E Copyright © 2006 Huawei Technologies Co. All rights reserved. Ltd.. Ltd. Page69 From RX-in. so channel B of the two DRFUs are canceled ..Two Way Receive Diversity  In this mode ， both of the 2 TRXs can work  Each TRX receives the signal from 2 feeders   In the following figure ， the TRX gets the receiving signal from channel A and B of the single DRFU It is also possible for TRX to use the channel A receiver of another DRFU Processing CPRI-W Interface Unit CPRI-E ANTA DUP ANTB DUP RX-IN RX_OUT Copyright © 2006 Huawei Technologies Co. TRX can also use the channel A of the other DRFU. All rights reserved. Ltd. only the first TRX can work  The working TRX gets the uplink signal from 4 feeders of 2 DRFUs 2 channels from the other DRFU CPRI-W Interface Processing CPRI-E ANTA ANTB DUP RX-IN RX_OUT CPRI-W Interface Processing CPRI-E ANTA ANTB DUP RX-IN RX_OUT Copyright © 2006 Huawei Technologies Co.Four Way Receive Diversity  In this mode. Page70 . All rights reserved.. 3 RF cable connection  3. Configuration of the BTS3900  3.1 Work modes in BTS3900 configuration  3. Ltd.4 Topology configuration  3.Contents  3. Page71 .5 Configuration principles Copyright © 2006 Huawei Technologies Co..2 Typical configuration  3. All rights reserved. Ltd.. All rights reserved. Page72 .Typical Configuration 1 Copyright © 2006 Huawei Technologies Co. Ltd.. Page73 . All rights reserved.Typical Configuration 2 Copyright © 2006 Huawei Technologies Co. Typical Configuration 3 Copyright © 2006 Huawei Technologies Co.. All rights reserved. Page74 . Ltd. Page75 .. Ltd. All rights reserved.Typical Configuration 4 Copyright © 2006 Huawei Technologies Co. . Page76 .Typical Configuration 5 Copyright © 2006 Huawei Technologies Co. Ltd. All rights reserved. 2 Typical configuration  3.3 RF cable connection  3.Contents  3.4 Topology configuration  3.. Configuration of the BTS3900  3. Page77 .5 Configuration principles Copyright © 2006 Huawei Technologies Co.1 Work modes in BTS3900 configuration  3. Ltd. All rights reserved. . Ltd. Page78 .RF Cable Connection 1  One DRFU module  One dual-polarized antenna Cell Type Supported TRX Mode S1 (without transmit diversity) Transmit Independency or Combining Double Antenna S1 (with transmit diversity) Transmit Diversity Double Antenna S2 (without transmit diversity) Transmit Independency or Combining Double Antenna Antenna Mode Copyright © 2006 Huawei Technologies Co. All rights reserved. . Page79 . All rights reserved. Ltd.RF Cable Connection 2 (1)  Two DRFU modules  One dual-polarized antenna Cell Type Supported S2 (PBT) TRX Mode PBT Antenna Mode Single Antenna Double Receiver S3 (without transmit diversity) Transmit Independency or Combining Single Antenna S4 (without transmit diversity) Transmit Independency or Combining Single Antenna Double Receiver Double Receiver Copyright © 2006 Huawei Technologies Co. Page80 . All rights reserved.RF Cable Connection 2 (2)  Two DRFU modules  One dual-polarized antenna Cell Type Supported TRX Mode Antenna Mode S2 (with transmit diversity) Transmit Diversity Single Antenna S2 (4-way receive diversity) 4-Way Receive Diversity Single Antenna S4 (transmit independency) Transmit Independency or Combining Single Antenna Double Receiver Double Receiver Double Receiver Copyright © 2006 Huawei Technologies Co. Ltd.. . Page81 .RF Cable Connection 3  Three DRFU modules  Two dual-polarized antennas Cell Type Supported S5 (without transmit diversity) TRX Mode Antenna Mode DRFU0: Single Antenna Double Receiver Transmit Independency DRFU1: Single Antenna or Combining Double Receiver DRFU2: Double Antenna S6 (without transmit diversity) DRFU0: Single Antenna Transmit Double Receiver Independency DRFU1: Single Antenna or Combining Double Receiver DRFU2: Double Antenna Copyright © 2006 Huawei Technologies Co. Ltd. All rights reserved. RF Cable Connection 4  Four DRFU modules  Two dual-polarized antennas Cell Type Supported TRX Mode S7 (without transmit diversity) Transmit Independency or Combining S8 (without transmit diversity) Transmit Independency or Combining Antenna Mode Single Antenna Double Receiver Single Antenna Double Receiver Copyright © 2006 Huawei Technologies Co. Ltd. Page82 . All rights reserved.. 2 Typical configuration  3.5 Configuration principles Copyright © 2006 Huawei Technologies Co. Ltd. Page83 . Configuration of the BTS3900  3.3 RF cable connection  3.1 Work modes in BTS3900 configuration  3..Contents  3. All rights reserved.4 Topology configuration  3. such as cities  Advantages   In the star topology.BTS3900 Topologies . Ltd. All rights reserved. the star topology requires more transmission cables Copyright © 2006 Huawei Technologies Co. Page84 .Star  The star topology applies to common areas. each site is directly connected to the BSC. especially densely populated areas. It has the following features:  Easy networking  Easy project implementation  Easy network maintenance  Easy network expansion  High network reliability Disadvantages  Compared with other topologies.. the transmission reliability in the chain topology is reduced  The faults in the upper-level BTSs may afect the lower-level BTSs  The number of levels in a chain network should not exceed five Copyright © 2006 Huawei Technologies Co. Page85 . and transmission link lease  Disadvantages  As signals pass through many nodes..Chain  The chain topology applies to sparsely populated areas in strip-like terrain. All rights reserved. such as areas along highways and railway tracks  Advantages  The chain topology reduces cost in transmission equipment. Ltd. construction.BTS3900 Topologies . BTS3900 Topologies - Tree  The tree topology applies to areas where network structures, site distribution, and subscriber distribution are complicated, for example, an area where large-scale coverage overlaps hot spot or small-scale coverage  Advantages   The tree topology requires fewer transmission cables compared with the star topology Disadvantages     As signals pass through many nodes, the transmission reliability is reduced. This makes it difficult for maintenance and engineering The faults in the upper-level BTSs may afect the lower-level BTSs Capacity expansion is difficult The number of levels in the tree should not exceed five Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page86 BTS3900 Topologies - Ring  The ring topology applies to common scenarios. Due to its strong self-healing capability, the ring topology is preferred if permitted by the routing  Advantages   If there is a breaking point in the ring, the ring breaks into two chains at the breaking point automatically. In this way, the BTSs preceding and following the breaking point can work normally despite the breaking point; thus improving the robustness of the system Disadvantages  In the ring topology, there is always a link section that does not transfer data Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page87 DRFU Topologies Configuration  The DRFU supports various network topologies: star, chain, and ring Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page88 All rights reserved.Contents  3.4 Topology configuration  3. Configuration of the BTS3900  3. Ltd..5 Configuration principles Copyright © 2006 Huawei Technologies Co.3 RF cable connection  3.1 Work modes in BTS3900 configuration  3. Page89 .2 Typical configuration  3. All rights reserved. Page90 . and supports the dual-band application  Minimum cost  Smooth upgrade of configuration  Antenna configuration principles  Minimum number of DRFUs  Minimum number of BBUs  Highest reliability  Mode of configuring two TRXs in one sector Copyright © 2006 Huawei Technologies Co..Basic Configuration Principles  A single BTS3900/BTS3900A cabinet provides up to 12 carriers with the maximum cell configuration of S4/4/4. Ltd. Each sector of the BTS must be configured with the minimum number of antennas. If combination is required. Page91 . the cavity combiner must be configured outside the DRFU and one combination is recommended Copyright © 2006 Huawei Technologies Co. each sector has two antenna channels. Ltd. for the configuration higher than the S4/4/4 cell configuration. each sector has four antenna channels  Non-combination in the transmit channel. All rights reserved. the ring topology is recommended between the BBU and the DRFU  Minimum number of antennas. For the 2-antenna receive diversity.. the star topology is recommended between the BBU and the DRFU. for the 4-antenna receive diversity. The non-combination configuration is recommended for the DRFU to avoid the power loss in combination and to reduce the power consumption of the BTS.RF Configuration Principles  A maximum of three levels of DRFUs can be connected to one BBU  For S4/4/4 cell configuration and lower configurations. Configuration Principles of the BBU Minimum number of trunk cables.. and take the existing configuration for saving transmission resources into account in networking  Minimum number of UPEUs. The configuration of a single UPEU is recommended. The redundancy backup mode can be configured if required  One BBU supports six CPRI ports. The star topology is recommended between DRFUs Copyright © 2006 Huawei Technologies Co. All rights reserved. Page92 . Ltd. You can determine the  number of trunk cables as required. All rights reserved.Summary  BTS3900 functions and features  BTS3900 hardware structure and components  Working mode. typical configurations. topology configurations. RF cable configurations. Page93 .. Ltd. configuration principles Copyright © 2006 Huawei Technologies Co. Thank you www.huawei.com .