Dual-Mode BTS3900 Hardware Structure

Revision Record Don’t Print This Page Course Code Product
Course Name Revision Record Don’t Print This Page Course Code Product Product Version Course Version ISSUE OME902100 BTS3900 V100R001 1.00 Developer/Modifier Time Approver New/Update Linzhihang/68219 Shenpengjun/ New Confidential Information of Huawei. No Spreading Without Permission

Dual-Mode BTS3900 Hardware Structure
Course Name Dual-Mode BTS3900 Hardware Structure Confidential Information of Huawei. No Spreading Without Permission

Course Name Foreword BTS3900 Base Station is the fourth generation base station developed by Huawei. It features a multi-mode modular design and supports three working modes: GSM mode, GSM+UMTS dual mode, and UMTS mode through configuration of different software. In addition, the BTS3900 supports smooth evolution to the Long-Term Evolution (LTE). Confidential Information of Huawei. No Spreading Without Permission

References BTS3900 Hardware Description
Course Name References BTS3900 Hardware Description 3900 Series Multi-Mode Base Station Product Description Confidential Information of Huawei. No Spreading Without Permission

Objectives Upon completion of this course, you will be able to:
Course Name Objectives Upon completion of this course, you will be able to: Know the application scenarios of Dual-Mode BTS3900 Grasp the hardware structure of Dual-Mode BTS3900 Grasp the functions of the modules Master typical configuration of Dual-Mode BTS3900 Know the networking topology of Dual-Mode BTS3900 Confidential Information of Huawei. No Spreading Without Permission

Contents 1. BTS3900 Overview 2. BTS3900 Hardware Components
Course Name Contents 1. BTS3900 Overview 2. BTS3900 Hardware Components 3. BTS3900 Signal Flow 4. BTS3900 Configuration 5. BTS3900 Network Confidential Information of Huawei. No Spreading Without Permission

Location of BTS3900 PSTN ISDN PSPDN Um Interface BTS3900 OMC
Course Name PSTN ISDN PSPDN Um Interface BTS3900 OMC HLR/AUC/EIR BSC6900 MSC/VLR SMC/VM A Interface MAP TUP,ISUP MS MS: Mobile Station BTS: Base Transceiver Station BSC: Base Station Controller HLR: Home Location Register AUC: Authentication Center OMC: Operation and Maintenance Center MSC: Mobile Switching Center VLR: Visitor Location Register SMC: Short Message Center VM: Voice Mailbox EIR: Equipment Identity Register Confidential Information of Huawei. No Spreading Without Permission

Advanced Platform-Based Architecture
Course Name Based on the unified hardware platform, the BTS3900 supports three working modes: GSM Only mode, GSM+UMTS dual mode, and UMTS Only mode. The RF module integrates the duplexer and the Transceiver Unit (TRU), thus enhancing integrity of RF parts and meeting future requirements for a compact, high-efficiency, and low-cost base station. The MRFU is a multi-carrier RF filtering unit. One MRFU supports a 6 TRXs in GSM Only mode or 4 TRXs in UMTS Only mode or 6 TRXs in GSM+UMTS mode. Receiver sensitivity on TCH/FS is -113 dBm It supports the hierarchical cell, concentric cell, and micro cell It supports omnidirectional cells and directional cells. It supports the A5/3, A5/2, and A5/1 encryption and decryption algorithms. It supports the cell broadcast SMS and point-to-point SMS. It supports coexistence with the BTS3X, BTS3012, and DBS3900. Confidential Information of Huawei. No Spreading Without Permission

Features of Dual-Mode BTS3900
Course Name Upper synchronization clock, extract clock from Abis/Iub interface. Extract clock from GPS (Global Positioning System). Synchronization with the IP clock, a highly cost-effective clock solution, which can be obtained through software upgrade without additional hardware. Supports whole frequency band of PGSM 900MHz, high 45MHz frequency band and low 45MHz frequency band of DCS1800MHz, high 40MHz frequency band and low 40MHz frequency band of 1900MHz. Clock phase lock, tracing, and memory functions and free-run synchronization mode. When the clock operates in free-run mode, the system can keep operational for at least 90 days at normal temperature. Confidential Information of Huawei. No Spreading Without Permission

BTS3900 Hardware Structure
The dimensions of the BTS3900 cabinet 600mm(Width)*450mm(Depth)*900mm(Height) The weight of the BTS3900 cabinet Empty cabinet:57kg Full Configuration: 132kg

Structure of the BTS3900 Cabinet
Course Name The BTS3900 cabinet (-48V) uses the external -48V DC input. The DC power is directly led into the DCDU-01 and the DCDU-01 distributes the DC power to each component in the cabinet. The BTS3900 cabinet (+24V) uses the external +24V DC input. The PSUs (DC/DC) convert the external input power into -48V DC power and supply the -48V DC power to the DCDU-01.Then, the DCDU-01 distributes the -48V DC power to each component in the cabinet. The BTS3900 cabinet (~220 V) uses the external 220 V AC input. The PSUs (AC/DC) convert the external input power into -48 V DC power and supply the -48 V DC power to the DCDU-01.Then, the DCDU-01 distributes the -48 V DC power to each component in the cabinet. -48V Cabinet V Cabinet ~220V Cabinet Confidential Information of Huawei. No Spreading Without Permission

Logical Structure and Signal Flow
Course Name The BTS3900 mainly consists of the BBU and RFUs. The logical structure of the BTS3900 consists of the RF subsystem, control subsystem, power subsystem, and antenna subsystem. RF subsystem, implemented by the MRFU Control subsystem whose functions are implemented by the BBU Power subsystem whose functions are implemented by the following modules: DCDU-01 Module in the BTS3900 cabinet (-48 V DC) DCDU-01 Module and Power Subrack (DC/DC) in the BTS3900 cabinet (+24 V DC) DCDU-01 Module and Power Subrack (AC/DC) in the BTS3900 cabinet (220 V AC) Antenna subsystem whose functions are implemented by the following modules: GATM TMA Antenna Confidential Information of Huawei. No Spreading Without Permission

Contents 2. BTS3900 Hardware Components 2.1 BBU Unit 2.2 RF Unit
Course Name Contents 2. BTS3900 Hardware Components 2.1 BBU Unit 2.2 RF Unit 2.3 Power module & Components Confidential Information of Huawei. No Spreading Without Permission

BBU The typical power consumption of BBU is 35W
Course Name The typical power consumption of BBU is 35W The weight of the BBU is 12 kg at most All the boards can be inserted from the front panel The permissible range of power input is –38.4 V DC to –57 V DC The BBU3900 is the baseband control unit that enables the communication between the BTS and the BSC. The BBU3900 has the following functions: Providing physical ports for the communication between the BTS and the BSC Providing the CPRI ports for communication with the RFUs Providing the USB port for downloading the BTS software Providing the OM channel connected to the LMT or M2000 Processing the UL and DL data Providing centralized management on the entire BTS system, such as OM and signaling processing Providing the reference clock for the system Confidential Information of Huawei. No Spreading Without Permission

Working Principles of BBU(GSM Only)
Course Name The BTS interface unit performs the following functions: Connects the BTS to the BSC. Exchanges data between the E1 link and the DBUS. Synchronizes the lower-level clock with the upper-level clock. The central processing unit performs centralized management of the entire distributed base station system in terms of OM and signaling processing, and provides system clocks. The central processing unit performs the following functions: Supports the protocols such as UART and HDLC. Controls the BTS interface unit to enable the communication between the BBU and the BSC. Controls the high-speed interface unit in the BBU to enable the communication between the BBU and the MRFU. Performs the clock-related functions, that is, provides timing signals, manages BTS clocks, and supports external synchronization clock input. The high-speed interface unit performs the following functions: Receives uplink baseband data from the MRFU. Transmits downlink baseband data to the MRFU. Provides up to six SFP optical ports per BBU3900. The clock unit performs the following functions: Provides the high-accuracy clock source for the BTS and provides the system clock based on this clock source. Checks the phase-locking status, provides software phase-locking, adjusts DA values, and generates frame numbers. The monitoring unit collects the information of Boolean alarms and reports the alarm information to the central processing unit. Confidential Information of Huawei. No Spreading Without Permission

BSBC Board Course Name The BSBC provides slot 6 for the GTMU, slot 7 for a main control board that supports 3G, and slots 0 to 5 as common slots. The GTMU is 1 U high. Therefore, from the view of the front panel, the GTMU is located in slots 5 and 6 Provide backplane interfaces, communication channels, distribute clock signal and +12V power supply for the other boards BBU3900 configuration principle BOARD Mandatory/optional NO. of boards Slot GTMU mandatory 1 Slot5 和Slot6 UBFA FAN UPEU 2 PWR1 和PWR2 UELP optional Slot0 和Slot4 UEIU USCU Slot2、Slot3 和Slot7 Confidential Information of Huawei. No Spreading Without Permission

Boards and Modules in BBU
Course Name Universal Board BSBC UBFA UPEU UELP UEIU UFLP GSM Board GTMU UMTS Board WMPT WBBP UTRP Confidential Information of Huawei. No Spreading Without Permission

GTMU Controls, maintains, and operates the BTS
Course Name Controls, maintains, and operates the BTS Monitors the fan module and the power supply module Distributes and manages BTS clock signals Provides the Ethernet port for terminal maintenance Supports four routes of E1 inputs Provides the CPRI ports for communication with the MRFU The GSM Transmission, Timing, and Management Unit for BBU (GTMU) controls and manages the entire BTS. It provides interfaces related to the reference clock, power monitoring, OM, and external alarm collection. Confidential Information of Huawei. No Spreading Without Permission

GTMU Ports Label Connector Type Description CPRI0-CPRI5 SFP
Course Name Label Connector Type Description CPRI0-CPRI5 SFP Ports for the communication between the BBU and the RF module; support input and output of the optical and electrical signal . ETH RJ45 Port for local maintenance and commissioning FE0 A reserved port that performs the following function: Connects the BBU to a routing device in the equipment room through the Ethernet cable to transmit network information. FE1 DLC Connects the BBU to a routing device in the equipment room through the optical cable to transmit network information. USB Enables the automatic software upgrade from a USB disk. TST Provids a reference clock for the tester. E1/T1 DB26 female Provides the input and output of the four E1/T1 signals between the GTMU and the UELP or between the GTMU and the BSC. The RESET button on the GTMU is used to reset the GTMU. Confidential Information of Huawei. No Spreading Without Permission

GTMU Indicators LED Color Status Description RUN Green ON
Course Name LED Color Status Description RUN Green ON The board is faulty. OFF No power supply is available or the board is faulty. ON for 1s, OFF for 1s The board is operational. ON for 2s, OFF for 2s The OML link is abnormal. ON for 0.125s OFF for 0.125s The board is loading software. ALM Red A fault occurs in the running board. No alarm is generated. ACT LIU0-LIU3 This link is not used. A remote E1/T1 alarm is generated. This link is operational. CPRI0-CPRI5 The CPRI link is normal. The reception of the optical module is abnormal and an alarm is generated. Confidential Information of Huawei. No Spreading Without Permission

UMTS Board-WMPT Course Name WCDMA Main Processing and Transmission unit (WMPT) is the BBU3900 main control and transmission board of UMTS system. Processing signaling and managing resources for other boards in the BBU. Providing four E1s/T1s which support ATM and IP protocols. Providing one FE electrical port and one FE optical port which support the IP protocol. UMTS ETH IP: Providing Operation and Maintenance (OM) functions such as configuration management, equipment management, performance monitoring, signaling processing, and active/standby switchover and providing OM channels connected to the OMC (LMT or M2000). Preferentially configured in slot 7 in the case of a single WMPT Confidential Information of Huawei. No Spreading Without Permission

UMTS Board-WMPT Ports Board Port Connector Type Description WMPT E1/T1
DB26 connector E1 FE0 RJ45 connector FE electrical port FE1 SFP connector FE optical port GPS SMA connector GPS antenna ETH Commissioning Ethernet port USB USB connector USB loading port TEST USB testing port RST — Resetting the BBU

UMTS Board-WBBP Course Name WCDMA Baseband Process Unit (WBBP) board is a mandatory board of the BBU3900 that processes baseband signals. Provides the CPRI ports for communication between the BBU and the RFU, and supporting CPRI ports in 1+1 backup mode. Processes uplink and downlink baseband signals. There’re two types of WBBP board: WBBPa and WBBPb. Preferentially configured in slot 3 ,slot 0 and slot 1 in the case of the WBBP that transmits CPRI signals,slot 2 is reserved. Confidential Information of Huawei. No Spreading Without Permission

UMTS Board-UTRP Course Name Universal Transmission Processing unit (UTRP) board. It is a transmission extension board of the BBU3900 and provides eight E1s/T1s and one unchannelized STM-1/OC-3. Providing extension Iub transmission ports which support eight E1s/T1s and one unchannelized STM-1/OC-3. Supporting ATM and IP transport. Supporting cold backup It can be configurate in Slot 0 － Slot 5. Confidential Information of Huawei. No Spreading Without Permission

UMTS Board-UTRP Course Name The UTRP can be configured with different sub-boards to support different ports. Sub-Board Port UAEU Ports for eight ATM over E1s/T1s UIEU Ports for eight IP over E1s/T1s UUAS Port for one unchannelizedSTM-1/OC-3 Panel of the UTRP (with eight E1s/T1s) The panel of the UTRP configured with the UAEU or UIEU is different from that of the UTRP configured with the UUAS. Panel of the UTRP (with one STM-1) Confidential Information of Huawei. No Spreading Without Permission

UELP Course Name UELP is the E1/T1 signal lightening protection unit of BBU and it can provide protection for 4 route E1/T1 signal GTMU Port Type Relative cables Description INSIDE 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 The Universal E1/T1 Lightning Protection (UELP) is a universal E1/T1 surge protection unit. The UELP is optionally installed in the SLPU or BBU. Each UELP provides surge protection for four E1s/T1s. Confidential Information of Huawei. No Spreading Without Permission

UFLP Course Name The universal FE lightning protection (UFLP) board is optionally installed in the SLPU or BBU3900. Each UFLP supports 2-way FE surge protection. GTMU Confidential Information of Huawei. No Spreading Without Permission

UPEU Course Name The universal power and environment interface unit (UPEU) supports the -48V /-24V DC power input, supplies power to the boards, modules, and fan in the BBU, and provides access to multiple environment monitoring signals Port Type Description MON0 RJ45 Transmitting two RS485 environment monitoring signals MON1 EXT-ALM0 Transmitting four dry contact alarms EXT-ALM1 PWR 3V3 +24 V/-48 V DC power input The UPEU is classified into the Universal Power and Environment Interface Unit Type A (UPEA) and the Universal Power and Environment Interface Unit Type B (UPEB). The UPEA converts -48 V DC to +12 V DC The UPEB converts +24 V DC to +12 V DC The UPEU has the following functions: Converting -48 V or +24 V DC to +12 V DC that is applicable to the boards Providing two ports with each transmitting one RS485 signal and another two ports with each transmitting four dry contact signals Providing reverse connection protection for power cable connectors. Confidential Information of Huawei. No Spreading Without Permission

UEIU Course Name 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 Label Connector Type Description MON0 RJ45 One RS485 signal MON1 EXT-ALM0 Four dry contact signals EXT-ALM1 The UEIU transmits monitoring signals and alarm signals from external devices to the main control board Providing two ports with each transmitting one RS485 signal Providing two ports with each transmitting four dry contact signals Confidential Information of Huawei. No Spreading Without Permission

Monitoring System Course Name The BTS3900 monitoring system enables the power monitoring, fan monitoring, and environment monitoring The BBU provides a maximum of two RS485 buses and 16 Boolean signals. The modules on RS485 bus 0 cannot be interchanged with the modules on RS485 bus 1. When two PMUs are configured, they cannot be connected to the same bus if the settings of the DIP switches on the two PMUs are the same. The RS485 bus 0 is indicated by bus0. The RS485 bus 1 is indicated by bus1. Confidential Information of Huawei. No Spreading Without Permission

USCU Course Name The Universal Satellite Card and Clock Unit (USCU) is compatible with six types of satellite card, provides absolute timing information and the 1 Pulse Per Second (PPS) reference clock for the main control board, and provides the RGPS ports and BITS port. Port Description 1 GPS port Used for receiving GPS signals 2 RGPS ports Used for receiving RGPS signals 3 BITS port Connected to the BITS clock; supporting adaptive input of the MHz and 10 MHz clocks 4 TEST port Used for testing the clock The USCU has the following functions: Providing absolute timing information and the 1 PPS reference clock for the main control board Compatible with six types of satellite card: Resolution T, M2M, GPS15L, K161, GG16, and JNS100 Determining the type of satellite card in use by checking the 1 PPS timing signals Supporting the input of RGPS signals Providing the BITS port and supporting adaptive input of the MHz and 10 MHz clocks Confidential Information of Huawei. No Spreading Without Permission

UBFA Course Name The universal BBU fan unit type A (2U) (UBFA) works with the air inlet box of the cabinet to form a ventilation circuit, thus cooling the entire cabinet The UBFA module communicates with the GTMU to regulate the temperature, adjust the fan speed, and report alarms. The UBFA module is hot swappable Label Color Status Description STATE Red /Green 0.125s ON, 0.125s OFF (Green) The module is not registered, and no alarm is reported. 1s ON, 1s OFF (Green) The module is running properly. 1s ON, 1s OFF (Red) The module is reporting alarms. OFF The module is powered off or the program is not loaded. The UBFA has the following functions: Controlling the fan speed Reporting the fan status to the main control board. Detecting the temperature of the air inlets Confidential Information of Huawei. No Spreading Without Permission

BBU Cables Connection(GSM Only)
BBU cables connection between BBU, BSC, RFU and Auxiliary equipment

BBU Hardware structure-Review
Please fill the board’s name in the blank of the BBU panel

Course Name Contents 2. BTS3900 Hardware Components 2.1 BBU Unit 2.2 RF Unit 2.3 Power module and Components Confidential Information of Huawei. No Spreading Without Permission

MRFU Course Name RF Unit handles modulation and demodulation between baseband signals and RF signals, data processing, and combining-distribution. The MRFU is a multi-carrier RF filtering unit. One MRFU supports a 6 TRXs in GSM Only mode or 4 TRXs in UMTS Only mode or 6 TRXs in GSM+UMTS mode. Confidential Information of Huawei. No Spreading Without Permission

Logical structure of the MRFU
Course Name The MRFU consists of the high-speed interface unit, signal processing unit, power amplifier, and duplexer. Confidential Information of Huawei. No Spreading Without Permission

MRFU Ports Port Type Label Connector Type Description Port for
Course Name Port Type Label Connector Type Description Port for transceiving RF signals ANT_RXB DIN connector Connecting to the antenna subsystem. ANT_TX/RXA CPRI CPRI0 SFP female connector Connecting to the BBU, or the upper-level RFU during the cascading. CPRI1 Connecting to the lower-level RFU during the cascading. Interconnection port for RF Receive signals RX_INB QMA female connector Input port of diversity signals in the antenna channel. RX_OUTA Output port of diversity signals in the Power supply port PWR 3V3 power connector Feeding power. Monitoring port MON RJ45 connector RS485 Monitoring、debugging port. Confidential Information of Huawei. No Spreading Without Permission

MRFU LED Label Status Description RUN ON
The power input is normal, but the module is faulty. OFF There is no power input, or the module is faulty. ON for 1s and OFF for 1s The module is running properly. ON for 0.125s and OFF for 0.125s The module is loading software or is not started. ALM The module is in the alarm status. No alarm is generated. ACT The module is functional and is connected to the BBU. The module is not connected to the BBU. The module is in the local test status.

MRFU LED Label Status Description VSWR OFF (red)
No VSWR alarm is generated. ON (red) A VSWR alarm is generated. CPRI0 ON (green) The CPRI link is normal. The interface module fails to receive signals. ON for 1s and OFF for 1s (red) The CPRI link is out of lock. CPRI1

Output power of each GSM TRX(W） Output power of each UMTS TRX(W)
Output power of MRFU Working mode GSM TRX UMTS TRX Output power of each GSM TRX(W） Output power of each UMTS TRX(W) GSM mode 1 80 2 40 3 31 4 27 5 18 6 16 UMTS mode 60 20

Output power of each GSM TRX(W） Output power of each UMTS TRX(W)
Output power of MRFU Working mode GSM TRX UMTS TRX Output power of each GSM TRX(W） Output power of each UMTS TRX(W) GSM+UMTS mode 1 40 2 20 3 24 10 4 17 12 13 5 15

Course Name Contents 2. BTS3900 Hardware Components 2.1 BBU Unit 2.2 RF Unit 2.3 Power module and Components Confidential Information of Huawei. No Spreading Without Permission

Main Functions of DCDU Receiving -48 V DC power input
Course Name 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 differential mode and 15 kA in common mode and providing dry contact for surge protection failure Confidential Information of Huawei. No Spreading Without Permission

Power Subrack (AC/DC) Course Name The power subrack (AC/DC) consists of the PMU, PSU (AC/DC) and the wiring unit of the power subrack (220 V). The power subrack (AC/DC) converts the 220 V AC power to the -48 V DC power. PMU PSU Wiring unit The PMU monitors the operating status of the PSU, provides a comprehensive function of power supply management, power distribution check, and alarm reporting. The PSU converts the input power into the -48 V DC power The wiring unit is connected to the external power supply through the terminals for L and N wires, and leads the power to the PSU through the backplane The wiring unit provides -48 V DC power outputs through LOAD1(-), LOAD2(-), and RTN(+) Confidential Information of Huawei. No Spreading Without Permission

Main Functions of PMU(AC/DC)
Course Name The Power and Environment Monitoring Unit (PMU) provides a comprehensive function of power supply management, power distribution check, and alarm reporting. Communicates with the GTMU through the RS232/RS422 serial port Manages the power system and the battery charging and discharging Detects and reports monitoring signals LEDs Power supply test ports RS232/RS422 ports Battery control switch COM port Detects power distribution and reports alarms, and also reports dry contact alarms Confidential Information of Huawei. No Spreading Without Permission

Main Functions of PSU(AC/DC)
Converting 220 V AC power to -48 V DC power and supplying -48 V DC power to the DCDU Monitoring alarms related to module faults (such as output overvoltage, no output, and fan faults), alarms related to module protection (such as over temperature protection and input overvoltage/undervoltage protection), and module out-of-position alarm 1 2 3 1 Power running LED 2 Protection LED 3 Fault LED

Power Subrack (DC/DC) The power subrack (DC/DC) provides access for the external +24 V DC. In the power subrack, it contain two components, PSUs (DC/DC) and Wiring unit. PSUs (DC/DC) convert the +24 V DC power into the -48 V DC power, and then leads the -48 V DC power to the DCDU-01 over the power cable through the wiring unit of the power subrack.

Main Functions of PSU(DC/DC)
Course Name Converting +24 V DC power to -48 V DC power and leading the -48 V DC power to the DCDU 1 Power running LED 2 Protection LED 3 Fault LED Monitoring alarms related to module faults (such as output overvoltage, no output, and fan faults), alarms related to module protection (such as overtemperature protection, and input overvoltage/undervoltage protection), and power out-of-position alarm Confidential Information of Huawei. No Spreading Without Permission

Power Distribution Mode 1
Course Name The BTS3900 cabinet can use three types of power inputs, namely, -48 V DC, +24 V DC, and 220 V AC If the external -48 V DC power input is used, no additional power system is required. The external -48 V DC power input is directly connected to the power input terminals on the DCDU (10 outputs). Then, the DCDU distributes the -48 V DC power to each module in the cabinet Confidential Information of Huawei. No Spreading Without Permission

Course Name 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. The PSUs convert the external power into the -48 V DC power and supply the -48 V DC power to the DCDU Then, the DCDU distributes the -48 V DC power to each module in the cabinet Confidential Information of Huawei. No Spreading Without Permission

Course Name This is the power distribution when a -48 V DC cabinet is stacked on a +24 V DC cabinet or +220V AC cabinet. 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. Then, the DCDUs distribute the -48 V DC power to the modules in both cabinets Confidential Information of Huawei. No Spreading Without Permission

Main Functions of GATM Course Name The GSM antenna and TMA control module (GATM) is a module that controls the antenna and TMA. The GATM is optional when the MRFU module is configured. Controls the RET antenna Feeds power to the TMA Reports the RET control alarm signals Monitors the current from the feeder Not support common TMA and RET antenna at the same time. Confidential Information of Huawei. No Spreading Without Permission

Ports on the GATM Ports Connector Function ANT0 ANT2 ANT4 SMA female
Course Name Ports Connector Function ANT0 ANT2 ANT4 SMA female Providing power for the RET antenna and transmitting control signals for the RET antenna ANT1 ANT3 ANT5 Providing power for the antenna COM1 RJ45 Used in connection to the BBU COM2 Providing the extended RS485 port to be cascaded with other devices -48 V 7W2 Receiving the -48 V power input Confidential Information of Huawei. No Spreading Without Permission

Features and Functions of Fan Box
Course Name The FAN unit, also called the fan box module, dissipates the heat in the cabinet. One FAN unit has four independent fans. Detects the temperature Communicates with BBU unit to report alarms and the adjusted rotation speed of the fans to BBU The fan box regulates the temperature at the air inlet of the cabinet and in the fan box. It can adjust the rotation speed of the fans to implement ventilation and dissipation for the cabinet. The fan box performs the following functions: 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 the central processing unit Communicates with the central processing unit to report alarms and the adjusted rotation speed of the fans based on the temperature to the central processing unit Stops the rotation of the fans when the ambient temperature is low A fan box is configured with one NFCB and four fans. NFCB The NFCB is located in the fan box and consists of the control unit and the power supply unit. The power supply unit filters and converts the -48 V DC power input, and distributes power to the control unit and each fan. The NFCB detects the temperature at the air inlet and reports it to the central processing unit. The rotation speed of the fans can be regulated by the central processing unit or adjusted automatically based on the temperature. Fans The fans perform forced heat dissipation for the entire cabinet. The fans are configured in N+1 mode. When one fan fails, the other fans rotate at full speed. At normal temperature, the fans can meet the heat dissipation requirements. Confidential Information of Huawei. No Spreading Without Permission

Cable Connection of -48V Cabinet
Course Name Cable Number Cable Name Quantity R1-R12 RF Jumpers 12 P1-P2 External Power Cables (-48 V) 2 P3-P8 Power Cables Between the DCDU and MRFUs 6 P9 Power Cable Between the DCDU and Fan Box 1 P10 Power Cable Between the DCDU and BBU P11-P12 Reserved S1-S6 CPRI Signal Cables Between the BBU and MRFU S7 E1 Transfer Cable of the BBU S8 Monitoring Signal Cables for the DCDU S9 Monitoring Signal Cable for the Fan Box S10 E1/T1 Cable of the BBU Confidential Information of Huawei. No Spreading Without Permission

Course Name Contents 1. BTS3900 Overview 2. BTS3900 Hardware Components 3. BTS3900 Signal Flow 4. BTS3900 Configurations 5. BTS3900 Network Confidential Information of Huawei. No Spreading Without Permission

BTS3900 Signal Flow The signal flow of the BTS3900 consists of the traffic signal flow and the signaling flow of the BTS. DL traffic signal flow UL traffic signal flow Signaling flow

Traffic Signal Flow Course Name The DL traffic signal flow is transmitted from the BSC to the MS through the BTS3900. The BBU and RFUs work together to process the DL traffic signals Opposite to the DL traffic signal flow, the UL traffic signal flow is transmitted from the MS to the BSC through the BTS3900. The BBU and RFUs work together to process the UL traffic signals BBU MRFU E1 CPRI DBUS CBUS FHBUS RF BSC The DL traffic signal flow is as follows: 1.The BSC sends E1 signals to the BBU through E1. 2.After receiving the E1 signals, the BBU processes the E1 signals as follows: Extracts clock signals from the E1 signals Configures the BTS system based on the data configuration on the OML Encapsulates the E1 data in the format of the CPRI frame, and then transmits the data to the RFU through the CPRI signal cable 3.After receiving the DL signals, the RFU processes the signals as follows: Decapsulates the high-speed CPRI frames to obtain the baseband signals Transmits the baseband signals to the relevant operation units for encapsulation and interleaving Converts the digital signals into the analog signals and modulates the analog signals into RF signals Combines or divides the RF signals based on its own configuration Transmits the combined or divided signals to the antenna subsystem The UL traffic signal flow is as follows: 1.The antenna receives the signals sent from the MS. If the TMA is configured, the received signals are amplified by the TMA and then transmitted to the RFU through the feeder. 2.After receiving the UL signals, the RFU processes the signals as follows: Divides the UL signals received from the antenna, or RX in. Converts the divided analog signals into the digital signals to obtain the baseband signals Transmits the baseband signals to the relevant operation units for decryption and de- interleaving Encapsulates the processed data in the format of the CPRI frame, and then transmits the data to the BBU through the CPRI signal cable 3.After receiving the signals, the BBU processes the signals as follows: Encapsulates the baseband signals in the format of the E1 frame, and then transmits the signals to the BSC through the E1 cable Confidential Information of Huawei. No Spreading Without Permission

Signaling Flow Course Name This describes the BTS3900 signaling flow on the Abis interface. The BBU serves as the control unit and works with the RFUs to process the signaling. BBU MRFU E1 CPRI DBUS CBUS FHBUS BSC The signaling flow is as follows: The signaling data received from the BSC is transmitted to the BBU through the Abis interface. The BBU encapsulates the signaling data in the format of the CPRI frame, and then transmits the signaling data to the RFU through the CPRI signal cable. The RFU decapsulates the CPRI signals into the baseband signals, transmits the baseband signals to the relevant operation units for processing. The RFU encapsulates the data of its own status in the format of the CPRI frame, and then transmits the data to the BBU through the CPRI signal cable. The BBU decapsulates the received CPRI signals to obtain the baseband signals. The BBU obtains the status of the BTS by analyzing the baseband signals. Then, the BBU transmits the information on the BTS status to the BSC through the Abis interface. Confidential Information of Huawei. No Spreading Without Permission

Contents 4. BTS3900 Configuration 4.1 Configuration Principle
Course Name Contents 4. BTS3900 Configuration 4.1 Configuration Principle 4.2 Typical Configuration Confidential Information of Huawei. No Spreading Without Permission

Antenna Configuration Principles
One dual-polarized antenna can serve a maximum of two RFUs. By default, RX diversity is adopted on the GSM network. That is, two feeders connected to two single-polarized antennas or one dual-polarized antenna must be configured in a cell. Each sector of the BTS must be configured with the minimum number of antennas. For the 2-way RX diversity, each sector has two antenna channels.

Whole 25MHz frequency band of 900MHz
Limitation of MRFU MRFU supports whole frequency band of PGSM 900MHz, high 45MHz frequency band and low 45MHz frequency band of DCS1800MHz. High 40MHz frequency band and low 40MHz frequency band of 1900MHz. MRFU DL UL Whole 25MHz frequency band of 900MHz MHz MHz Low 45MHz of 1800MHz MHz MHz High 45MHz of 1800MHz MHz MHz Low 40MHz of 1900MHz MHz MHz High 40MHz of 1900MHz MHz MHz

Limitation of MRFU The instantaneous frequency bands supported by MRFU
MRFU supports 2-way RX diversity. 4-way RX diversity and TX diversity are not supported MRFU Type Number of TX frequency band of TX Number of RX frequency band of RX GSM mode 1 15MHz 2 25MHz UMTS mode 20MHz GU dual mode

Configuration principle of MRFU
Course Name One MRFU supports a maximum cell configuration of S6. One MRFU does not serve two cells. Each cell with a single antenna can be configured with a maximum of two MRFUs. MRFU supports 1-way TX and 2-way RX. Star, chain, and ring are supported between the BBU and the MRFUs. When chain topology is adopted between the BBU and MRFUs, the MRFU supports 3 levels of cascading in a chain and thus the BBU supports a maximum of 18 (6 x 3) MRFUs. Frequency hopping: Cell without frequency hopping. The cell can work normally when the range of frequency is within 15MHz for each MRFU. Cell with Baseband frequency hopping. The frequency range of 2 MRFUs must within 25MHz when 2 MRFUs are used. And the range of frequency also must be within 15MHz for each MRFU. Cell with RF frequency hopping. The cell cannot adopt RF frequency hopping if the range of frequency is out of 15MHz. Because the frequency range of 2 MRFUs must be within 15MHz when 2 MRFUs are used. Confidential Information of Huawei. No Spreading Without Permission

Antenna Mode of MRFU Single Feeder Double Feeder
Two MRFU modules interconnection. 1TX and 2RX. Double Feeder Single MRFU module. 1TX and 2RX.

Antenna Mode of MRFU TX/RX TX/RX TX/RX TX/RX Single Antenna(1TX+2RX)
Double Antennas(1TX+2RX)

Transmit Mode and Receive Mode of MRFU
Course Name MRFU Transmit Mode Transmit independency or combining MRFU Receive Mode Main diversity receiver The system decides the transmitting and receiving path, and decides which TRX and port is used according to ‘Send Receive Mode’, ‘Transmit Mode’, ‘Receive Mode’ and ‘Power Type’ Confidential Information of Huawei. No Spreading Without Permission

Contents 4. Configurations of the BTS3900 4.1 Configuration Principle
Course Name Contents 4. Configurations of the BTS3900 4.1 Configuration Principle 4.2 Typical Configuration Confidential Information of Huawei. No Spreading Without Permission

GSM Only-MRFU S1~S6 S1~S6 Configuration
Course Name S1~S6 Configuration TX mode: Transmit Independency or Combining RX mode: Main diversity receiver Antenna mode: double antenna(1TX+2RX) When a dual-polarized antenna is configured, one TX channel and two RX channels are supported. The ANT_RXB and ANT_TX/RXA ports receive the signals from the antenna to achieve RX diversity. Confidential Information of Huawei. No Spreading Without Permission

GSM Only-MRFU S7~S12 S7-S12 Configuration
TX mode: Transmit Independency or Combining RX mode: Main diversity receiver Antenna mode: Single antenna(1TX+2RX)

BTS Star Topology Course Name The star topology applies to common areas, especially densely populated areas, such as cities In the star topology, each site is directly connected to the BSC Advantages Easy networking Easy project implementation Easy network maintenance Easy network expansion High network reliability Disadvantages Compared with other topologies, the star topology requires more transmission cables Confidential Information of Huawei. No Spreading Without Permission

BTS Chain Topology Course Name The chain topology applies to sparsely populated areas in strip-like terrain, such as areas along highways and railway tracks The chain topology reduces cost in transmission equipment, construction, and transmission link lease Disadvantages As signals pass through many nodes, the transmission reliability in the chain topology is reduced The faults in the upper-level BTSs may affect the lower-level BTSs The number of levels in a chain network should not exceed five Confidential Information of Huawei. No Spreading Without Permission

BTS Tree Topology Course Name The tree topology applies to areas where network structures, site distribution, and subscriber distribution are complicated 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 affect the lower-level BTSs Capacity expansion is difficult The number of levels in the tree should not exceed five Confidential Information of Huawei. No Spreading Without Permission

BTS Ring Topology Course Name The ring topology applies to common scenarios. Due to its strong self-healing capability, the ring topology is preferred if permitted by the routing 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. Confidential Information of Huawei. No Spreading Without Permission

MRFU Topologies Configuration
Course Name The MRFU supports various network topologies: Star, Chain, and Ring Confidential Information of Huawei. No Spreading Without Permission

Summary Dual-Mode BTS3900 functions and features
Course Name Summary Dual-Mode BTS3900 functions and features Dual-Mode BTS3900 hardware structure and components Dual-Mode BTS3900 configuration principles & typical configurations Dual-Mode BTS3900 topology configurations Confidential Information of Huawei. No Spreading Without Permission

Course Name Confidential Information of Huawei. No Spreading Without Permission

Dual-Mode BTS3900 Hardware Structure

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Dual-Mode BTS3900 Hardware Structure

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