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Dual-Mode BTS3900 Hardware Structure

Dual-Mode BTS3900 Hardware Structure. Foreword.

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Dual-Mode BTS3900 Hardware Structure

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  1. Dual-Mode BTS3900 Hardware Structure

  2. 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).

  3. References • BTS3900 Hardware Description • 3900 Series Multi-Mode Base Station Product Description

  4. 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

  5. Contents 1. BTS3900 Overview 2. BTS3900 Hardware Components 3. BTS3900 Signal Flow 4. BTS3900 Configuration 5. BTS3900 Network

  6. Um Interface PSTN ISDN PSPDN MS TUP,ISUP BTS3900 BSC6900 A Interface MS MSC/VLR MAP MAP BTS3900 HLR/AUC/EIR BTS3900 SMC/VM MS OMC BTS3900 Location of BTS3900

  7. Advanced Platform-Based Architecture • 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.

  8. Features of Dual-Mode BTS3900 • 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.

  9. Contents 1. BTS3900 Overview 2. BTS3900 Hardware Components 3. BTS3900 Signal Flow 4. BTS3900 Configuration 5. BTS3900 Network

  10. 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

  11. Structure of the BTS3900 Cabinet -48V Cabinet +24V Cabinet ~220V Cabinet

  12. Logical Structure and Signal Flow

  13. Contents 2.BTS3900 Hardware Components 2.1 BBU Unit 2.2 RF Unit 2.3 Power module & Components

  14. BBU • 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

  15. Working Principles of BBU(GSM Only)

  16. BSBC Board • 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

  17. GSM Board GTMU UMTS Board WMPT WBBP UTRP Boards and Modules in BBU • Universal Board • BSBC • UBFA • UPEU • UELP • UEIU • UFLP

  18. GTMU • 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

  19. GTMU Ports

  20. GTMU Indicators

  21. UMTS Board-WMPT • 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.

  22. UMTS Board-WMPT Ports

  23. UMTS Board-WBBP • 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.

  24. UMTS Board-UTRP • Universal Transmission Processing unit (UTRP) board. It is a transmissionextension 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

  25. UMTS Board-UTRP • The UTRP can be configured with different sub-boards to support differentports. Panel of the UTRP (with eight E1s/T1s) Panel of the UTRP (with one STM-1)

  26. GTMU UELP • UELP is the E1/T1 signal lightening protection unit of BBU and it can provide protection for 4 route E1/T1 signal

  27. GTMU UFLP • The universal FE lightning protection (UFLP) board is optionally installed in the SLPU orBBU3900. Each UFLP supports 2-way FE surge protection.

  28. UPEU • 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

  29. 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

  30. Monitoring System

  31. USCU • 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.

  32. UBFA • 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

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

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

  35. Contents 2.BTS3900 Hardware Components 2.1 BBU Unit 2.2 RF Unit 2.3 Power module and Components

  36. MRFU • 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.

  37. Logical structure of the MRFU • The MRFU consists of the high-speed interface unit, signal processing unit, power amplifier, and duplexer.

  38. MRFU Ports

  39. MRFU LED

  40. MRFU LED

  41. Output power of MRFU

  42. Output power of MRFU

  43. Contents 2.BTS3900 Hardware Components 2.1 BBU Unit 2.2 RF Unit 2.3 Power module and Components

  44. Main Functions of 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 differential mode and 15 kA in common mode and providing dry contact for surge protection failure

  45. Power Subrack (AC/DC) • 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

  46. Main Functions of PMU(AC/DC) • 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

  47. 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 Power running LED 2 Protection LED 3 Fault LED 1 2 3

  48. 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.

  49. Main Functions of PSU(DC/DC) • 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 1 2 3

  50. Power Distribution Mode 1 • 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

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