02 Omd902100 Bsc6900 (Go) Hardware System Issue1.01

Course NameP-0 BSC6900 GO Hardware System www.huawei.com Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. BSC6900 is an important network element(NE) of Huawei Single RAN solution. Ita dopts the industry-leading multiple radio access technologies (RATs), IP transmission mode, and modular design. In addition, it is integrated with the functions of the UMTS RNC and GSM BSC, thus efficiently maintaining the trend of multi-RAT convergence in the mobile network. The BSC6900 can be flexibly configured as a BSC6900 GSM, BSC6900 UMTS, or BSC6900 GU as required in different networks. Confidential Information of Huawei. No Spreading Without Permission Course Name P-1 Foreword The BSC6900 is an important network element (NE) of Huawei Single RAN solution. It adopts the industry-leading multiple radio access technologies, IP transmission mode, and modular design. It features high capacity, high integration, high performance, and low power consumption Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page1 Confidential Information of Huawei. No Spreading Without Permission Course Name P-2 References BSC6900 Technical Description BSC6900 Product Description BSC6900 Hardware Description Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page2 Confidential Information of Huawei. No Spreading Without Permission Course Name P-3 Objectives Upon completion of this course, you will be able to: Understand BSC6900 function and features Master BSC6900 hardware structure Detail the signal flows in BSC6900 List the typical hardware configuration of BSC6900 Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page3 Confidential Information of Huawei. No Spreading Without Permission Course Name P-4 Contents 1. System Description 2. Hardware Structure 3. System Signal Flow 4. Typical Configuration Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page4 Confidential Information of Huawei. No Spreading Without Permission Course Name P-5 Location of the BSC6900 The HUAWEI BSC6900 is a new generation GSM BSC product after BSC6000 and BSC6810 Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page5 The interfaces between the BSC6900 GSM and each NE in the GSM network are as follows: Um: the interface between the BTS and the MS Abis: the interface between the BSC6900 GSM and the BTS A: the interface between the BSC6900 GSM and the Mobile Switching Center (MSC) or Media Gateway (MGW) Gb: the interface between the BSC6900 GSM and the Serving GPRS Support Node (SGSN) The A, Um, and Gb interfaces are standard interfaces, through which equipment from different vendors can be interconnected. The BSC6900 GSM performs functions such as radio resource management, base station management, power control, and handover control. Confidential Information of Huawei. No Spreading Without Permission Course Name P-6 High Integration and Low Cost Supports 3,072 TRXs in a single cabinet Supports the simultaneous activation of up to 12,288 PDCHs Maximum of traffic: 19,500 Erl; BHCA : 5,250,000 Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page6 The BSC6900 GSM in BM/TC separated mode or A over IP mode supports 3,072 TRXs in a single cabinet. It caters to the mobile network requirements for higher capacity with fewer sites, thus requiring less space in the equipment room and reducing the power consumption. In addition, the BSC6900 GSM supports the simultaneous activation of up to 12,288PDCHs, thus meeting the increasing requirements for packet service growth and saving the cost of packet equipment Confidential Information of Huawei. No Spreading Without Permission Course Name P-7 Features of the BSC6900 System High integration and low cost Easy configuration and convenient maintenance All-IP platform Smooth evolution for investment protection Web-based LMT Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page7 The BSC6900 GSM has a small number of board types. In addition to transmission boards, the BSC6900 GSM cabinet accommodates boards such as network switching boards, signaling processing boards, and service processing boards. The simplification of board types reduces the maintenance cost. The interface boards and service boards, not bound together, are flexible in configuration and easy to maintain and expand. Based on its all-IP platform, the BSC6900 GSM betters the PS service performance. The Abis, A, and Gb interfaces support IP transmission, which provides sufficient bandwidth and saves transmission cost. The IP-based platform and interface meet the trend of flattened network and the requirements for network evolution. The BSC6900 GSM is compatible with the hardware of the BSC6000. Through software loading, the BSC6000 in the existing network can be upgraded to the BSC6900 GSM. The BSC6900 GSM can be upgraded to the BSC6900 GU through addition of the UMTS boards and software upgrade. This facilitates the deployment of a 3G network and protects the investment of the operator. Confidential Information of Huawei. No Spreading Without Permission Course Name P-8 Flexible Configuration Hardware Configuration BM/TC Separated Mode BM/TC Combined Mode A over IP Mode Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page8 In BM/TC combined mode, the BSC is not configured with the TCS. The boards that implement the TC functions are inserted into the slots in the MPS or EPS. With the same capacity, less cabinets and less subracks are required in the BSC, thus increasing the hardware integration. When the BSC is located in a remote equipment room, it is configured in BM/TC separated mode. The BSC is configured with a separate TCS, which is located in the TCR on the MSC side. Thus, the transmission resources between the BSC and the MSC are saved. In A over IP mode, the BSC directly connects to the Huawei core network without using the TC, thus protecting the operator's investment and improving the voice quality due to the reduction of encoding and decoding. The A over IP mode meets the needs for network evolution. Confidential Information of Huawei. No Spreading Without Permission Course Name P-9 BSC6900 Evolution Paths BSC6810 SW upgrade with Legacy HW + New HW (optional) BSC6900 UMTS Only BSC6900 UMTS Only SW upgrade with Legacy HW + New HW (necessary) BSC6900 Dual mode BSC6900 Dual mode SW upgrade with Legacy HW + New HW (necessary) BSC6000 SW upgrade with Legacy HW + New HW (optional) BSC6900 GSM Only BSC6900 GSM Only GBSS8.1/RAN10 GBSS9.0/RAN11 2006 2008 GBSS12.0/RAN12 2009 Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page9 The BSC6900 can be flexibly configured as a BSC6900 GSM, BSC6900 UMTS, or BSC6900 GU as requried in different networks. With the support of EDGE+, the BSC6900 GSM can be upgraded to the BSC6900 GU through additon of UMTS boards and software upgrade. Confidential Information of Huawei. No Spreading Without Permission Course Name P-10 Dual Mode Design GSM&UMTS cabinet GSM&UMTS co-cabinet RNC BSC Software Upgrade RNC RNC BSC RNC RNC BSC BSC • • • Smooth evolution from BSC to RNC with software upgrade Reducing CAPEX by reusing hardware Dynamic capacity adjustment between 2G&3G Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page10 Confidential Information of Huawei. No Spreading Without Permission Course Name P-11 Feature of BSC6900－Co OAM Unified CME : Simultaneous 2G/3G data configuration, correctness and efficiency guaranteed Unified WEB LMT for maintenance: 2G/3G Maintenance more easy and intuitionistic Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page11 Centralized OMC for GSM&UMTS, unified platform for network construction, 2G/3G network planning, performance evaluation and trouble shooting etc. Simplifying the network architecture, reducing co-ordination and maintenance effort, man power and OPEX Saving Confidential Information of Huawei. No Spreading Without Permission Course Name P-12 Feature of BSC6900－Co TRM FP FP FP FP FP UDP UNI-BTS pTRAU pTRAU IP / PPP IP SW Router 3G 2G IP IP SW 3G 2G Router UDP IP / FP Interface board pTRAU PPP pTRAU Co-transmission UNI-BSC Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page12 With unified transport resource management, bandwidth can be shared by UMTS&GSM. Confidential Information of Huawei. No Spreading Without Permission Course Name P-13 Feature of BSC6900－Co RRM Service direction on UMTS/GSM Load control between UMTS/GSM Heavy Load Heavy Load UMTS UMTS Load control by inter-RAT HO Voice PS service Heavy Load Heavy Load GSM GSM 3G/2G cell load consideration make it more accurate for the service direction, better performance achieved 3G/2G cell load consideration make traffic load spread in UMTS&GSM evenly, network usage efficiency improved Huawei Lab Simulation Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page13 The performance improvement value (>23%&1.4%) are based on Huawei simulation result. Confidential Information of Huawei. No Spreading Without Permission Course Name P-14 Contents 1. System Description 2. Hardware Structure 3. System Signal Flow 4. Typical Configuration Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page14 Confidential Information of Huawei. No Spreading Without Permission Course Name P-15 Contents 2. Hardware Structure 2.1 Cabinets 2.2 Subracks 2.3 Boards 2.4 Cables Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page15 Confidential Information of Huawei. No Spreading Without Permission Course Name P-16 BSC6900 Cabinet The BSC6900 uses the standard N68E-22 cabinet The N68E-22 cabinet is of two types, the single-door cabinet and the doubledoor cabinet 2200mm 2200mm 800mm 600mm 600mm 800mm N68E-22 Cabinet (Single-door/Doubledoor) Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page16 Item Dimensions Height of the available space Weight Specification 2,200 mm (height) x 600 mm (width) x 800 mm (depth) 46 U Empty cabinet ≤ 100 kg Cabinet in full configuration ≤ 300 kg • • Rated input voltage Input voltage range EMC -48 V -40 V to -57 V Meets the requirements in ETSI EN300 386 Meets the requirements in Council directive 89/336/EEC • • Confidential Information of Huawei. No Spreading Without Permission Course Name P-17 Components of the Cabinet Based on functions, cabinets are classified into the main processing rack (MPR), extended processing rack (EPR), and transcoder rack (TCR) (1) Filler panel (3) Air (2) Subrack (4) Power defense distribution box frame (5) Cable rack (6) Rear cable trough Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page17 MPR Only one MPR is configured in the BSC6900. EPR The number of EPRs to be configured depends on the traffic volume, but only one EPR can be configured in the BSC6900. You can also choose not to configure an EPR. TCR The number of TCRs to be configured depends on the traffic volume and the configuration modes of subracks. Up to two TCRs can be configured in the BSC6900. You can also choose not to configure a TCR. Component Configuration Power Distribution Box Subrack Only one power distribution box is configured. The MPR is configured with one main processing subrack (MPS) and depending on the traffic volume, zero to two extended processing subracks (EPSs) or transcoder subracks (TCSs). The EPR is configured with one to three EPSs or TCSs, depending on the traffic volume. The TCR is configured with one to three TCSs, depending on the traffic volume. Two air defense frames are configured. Three rear cable troughs are configured. Air Defense Frame Rear Cable Trough Confidential Information of Huawei. No Spreading Without Permission Course Name P-18 Components of the Cabinet POWER BOX POWER BOX POWER BOX 2 EPS 5 8 TCS 1 EPS 4 7 TCS 0 MPS 3 EPS 6 TCS MPR EPR TCR Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page18 MPR Only one MPR is configured in the BSC6900. EPR The number of EPRs to be configured depends on the traffic volume, but only one EPR can be configured in the BSC6900. You can also choose not to configure an EPR. TCR The number of TCRs to be configured depends on the traffic volume and the configuration modes of subracks. Up to two TCRs can be configured in the BSC6900. You can also choose not to configure a TCR. Component Configuration Power Distribution Box Subrack Only one power distribution box is configured. The MPR is configured with one main processing subrack (MPS) and depending on the traffic volume, zero to two extended processing subracks (EPSs) or transcoder subracks (TCSs). The EPR is configured with one to three EPSs or TCSs, depending on the traffic volume. The TCR is configured with one to three TCSs, depending on the traffic volume. Two air defense frames are configured. Three rear cable troughs are configured. Air Defense Frame Rear Cable Trough Confidential Information of Huawei. No Spreading Without Permission Course Name P-19 Power Distribution Box POWER BOX subrack2 subrack1 subrack0 (1) PAMU (2) Power distribution switches (3) Label for power distribution switches Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page19 Confidential Information of Huawei. No Spreading Without Permission Course Name P-20 Contents 2. Hardware Structure 2.1 Cabinets 2.2 Subracks 2.3 Boards 2.4 Cables Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page20 Confidential Information of Huawei. No Spreading Without Permission Course Name P-21 Subrack 436mm 12U 500mm (1) Fan box (4) Front cable trough (7) DC power input port (2) Mounting ear (5) Boards (8) Port for the monitoring signal cable of the power distribution box (3) Guide rail (6) Grounding screw (9) Cover plate of the DIP switch Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page21 The main components of the subrack are the fan box, slots, front cable trough, and backplane. Specification: In compliance with the IEC60297 standard, each subrack is 19 inches in width and 12 U in height. 1U=44.45mm=1.75inch. Weight of Empty subrack: 25 kg; Weight of subrack configured with boards: ≤ 57 kg The DIP switch with 8 bits on the subrack is used to set the number of the subrack. Confidential Information of Huawei. No Spreading Without Permission Course Name P-22 Dip Switch on the Subrack The DIP switch on the subrack has eight bits from 1 to 8 Subrack No. 0 1 2 3 4 5 Bit 1 0 ON 1 OFF 0 ON 1 OFF 0 ON 1 OFF 2 0 ON 0 ON 1 OFF 1 OFF 0 ON 0 ON 3 0 ON 0 ON 0 ON 0 ON 1 OFF 1 OFF 4 0 ON 0 ON 0 ON 0 ON 0 ON 0 ON 5 0 ON 0 ON 0 ON 0 ON 0 ON 0 ON 6 ON OFF OFF ON OFF ON 7 ON ON ON ON ON ON 8 OFF OFF OFF OFF OFF OFF Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page22 Bit 1-5 6 7 Description Bits 1 to 5 are used for setting the subrack number. Bit 1 is the least significant bit. If the bit is set to ON, it indicates 0. If the bit is set to OFF, it indicates 1. Odd parity check bit Reserved, undefined, startup mode of the Bit 8 is used to set thegenerally set to ON SCUa board. The description of this bit is as follows: When this bit is set to ON, the SCUa board is not in auto-startup mode. In this case, the SCUa board must be started by the loading from the OMUa board. When this bit is set to OFF, the SCUa board is in auto-startup mode. In this 8 case, the SCUa board checks the validity of the Flash file before it is started. If the Flash file is valid, the SCUa board is started by the loading from the Flash memory. Otherwise, the SCUa board is started by the loading from the OMUa board. Bit 8 switch OFF for parity check, the As the DIP is set touses odd the BSC6900. number of 1s in the eight bits must be an odd number. The method for setting the bits is as follows: Set bits 1 through 5 and bit 8. Set bit 7 to ON. Check the number of 1s in the bits of the DIP switch. If the number of 1s is even, set bit 6 to OFF. If the number of 1s is odd, set bit 6 to ON. Confidential Information of Huawei. No Spreading Without Permission Course Name P-23 Slots in the Subrack the boards are installed on both the front and rear sides of the backplane (1) Front slot (2) Backplane (3) Rear slot Page23 Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Each subrack provides a total of 28 slots. The 14 slots on the front side of the backplane are numbered from 00 to 13, and those on the rear side from 14 to 27. Two neighboring slots, such as slot 00 and slot 01 or slot 02 and slot 03, can be configured as a pair of active/standby slots. A pair of active and standby boards must be installed in a pair of active and standby slots. Confidential Information of Huawei. No Spreading Without Permission Course Name P-24 Main Processing Subrack (MPS) The MPS processes the basic services and performs the O&M function. In addition, the MPS provides clock for the system As the main processing subrack, the MPS is configured in the MPR. Only one MPS is configured in the BSC6900 Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page24 Confidential Information of Huawei. No Spreading Without Permission Course Name P-25 Main Processing Subrack (MPS) BSC6900 must have only one MPS Rear Board Front Board Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page25 Every board in MPS occupies 1 slot except OMU board which occupied 2 lots. In BM/TC combined configuration mode, the MPS must be configured with the OMUa board, TNUa board, SCUa board, GCUa board, XPUa board, DPUc board, and DPUd board. The EIUa board, OIUa board, GOUa board, and FG2a/PEUa board are optional boards. The INT board (interface board) can be the PEUa board, EIUa board, OIUa board, FG2a board, or GOUa board Confidential Information of Huawei. No Spreading Without Permission Course Name P-26 Extended Processing Subrack (EPS) As the extended processing subrack, the EPS is configured in the MPR or EPR. It processes the basic services of the BSC6900 Compared with the MPS, the EPS is not configured with the GCUa and OMUa Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page26 Confidential Information of Huawei. No Spreading Without Permission Course Name P-27 Extended Processing Subrack (EPS) BSC6900 has no EPS or up to 4 EPS for GSM Rear Board Front Board Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page27 In BM/TC separated configuration mode, the EPS must be configured with the TNUa board, SCUa board, XPUa board, and DPUd board. The DPUc board, GOUa board, EIUa/OIUa board, and PEUa/FG2a board are optional boards. In BM/TC combined configuration mode, the EPS must be configured with the TNUa board, SCUa board, XPUa board, DPUc board, and DPUd board. The EIUa board, OIUa board, and FG2a/PEUa board are optional boards. Note: The INT board (interface board) can be the PEUa board, EIUa board, OIUa board, FG2a board, or GOUa board. EPS has 14 slots in the front panel and another 14 slots in the back panel. The differences between MPS and EPS follow: No GCU board,no OMU board in EPS. Slot 0-5 are fixed for the SPU board,slot 6,7 are fixed for SCU,slot 12,13 are fixed for DPU board,slot 20-23 are fixed for OMU board,slot 20-27 are fixed for Interface board Confidential Information of Huawei. No Spreading Without Permission Course Name P-28 TransCoder Subrack (TCS) The TCS is the transcoder subrack. In BM/TC separated configuration mode, the TCS is configured in the MPR, EPR, or TCR It performs transcoding, rate adptation, and sub-multiplexing Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page28 Confidential Information of Huawei. No Spreading Without Permission Course Name P-29 TransCoder Subrack (TCS) BSC6900 has up to 4 TCS for GSM Rear Board Front Board Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page29 Confidential Information of Huawei. No Spreading Without Permission Course Name P-30 Contents 2. Hardware Structure 2.1 Cabinets 2.2 Subracks 2.3 Boards 2.4 Cables Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page30 Confidential Information of Huawei. No Spreading Without Permission Course Name P-31 BSC6900 Logical Structure Clock (optional) Clock Synchronization Subsystem To BTS To other BSC To MSC To SGSN Interface Processin g Subsyste m Switching Subsystem Service Processing Subsystem OM Subsystem LMT/M2000 Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page31 Besides, the BSC6900 has the power subsystem and environment monitoring subsystem. Confidential Information of Huawei. No Spreading Without Permission Course Name P-32 Switching Subsystem The switching subsystem performs the following functions Provides intra-subrack Medium Access Control (MAC) switching Provides intra-subrack Time Division Multiplexing (TDM) switching Provides switching channels for traffic data Provides OM channels Distributes clock signals to the service processing boards Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page32 The switching subsystem consists of the SCUa boards, TNUa boards, high-speed backplane channels in each subrack, crossover cables between SCUa boards, and inter-TNUa cables Confidential Information of Huawei. No Spreading Without Permission Course Name P-33 Switching Subsystem (Cont.) Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page33 The switching subsystem consists of two types of logical modules: MAC switching and TDM switching. It show the position of the switching subsystem in the overall structure of the system, with the modules highlighted in apricot. Confidential Information of Huawei. No Spreading Without Permission Course Name P-34 Network Topologies Between Subracks MAC switching - star topology One node functions as the center node and it is connected to each of the other nodes. The communication between the other nodes must be switched by the center node TDM switching - mesh topology There is a connection between every two nodes. When any node is out of service, the communication between other nodes is not affected Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page34 In the switching subsystem of the BSC6900, the star topology is established among the MAC switching logical modules, and the mesh topology is established among the TDM switching logical modules. Confidential Information of Huawei. No Spreading Without Permission Course Name P-35 TNUa Board The TNUa board performs the following functions: Provides 128 k * 128 k TDM switching Allocates the TDM network resources Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page35 The TNUa board provides the TDM switching and serves as the switching center for the CS services of the entire system. Port Name 10/100/1000BASET COM CLKIN TESTOUT Function For inter-subrack connection Serial port for commissioning Receiving the 8 kHz and the 1PPS timing signals from the GCUa/GCGa Test the timing signal output Type RJ45 RJ45 RJ45 SMB male Confidential Information of Huawei. No Spreading Without Permission Course Name P-36 SCUa Board The SCUa board performs the following functions: Provides the maintenance management function Provides configuration and maintenance of a subrack or of the entire BSC6900 Monitors the power supply, fans, and environment of the cabinet Enables inter-subrack connections Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page36 The SCUa board provides the maintenance management and GE switching platform for the subrack in which it is located. Thus, the BSC6900 internal MAC switching is implemented and the internal switching in turn enables complete connection between all modules of the BSC6900. Port Name 10/100/1000BASET COM CLKIN TESTOUT Function For inter-subrack connection Serial port for commissioning Receiving the 8 kHz and the 1PPS timing signals from the GCUa/GCGa Test the timing signal output Type RJ45 RJ45 RJ45 SMB male Confidential Information of Huawei. No Spreading Without Permission Course Name P-37 Service Processing Subsystem The service processing subsystem performs the following functions Radio resource management and control Radio access management Cell broadcast service control CS service processing PS service processing Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page37 Service processing subsystems can be increased as required according to the linear superposition principle. Thus, the service processing capability of the BSC6900 is expanded. Service processing subsystems communicate with each other through the switching subsystem to form a resource pool and perform tasks cooperatively. Confidential Information of Huawei. No Spreading Without Permission Course Name P-38 Service Processing Subsystem Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page38 The service processing subsystem mainly consists of two logical modules: BSC control plane (CP) and BSC user plane (UP). Figure shows the position of the service processing subsystem in the overall structure of the system, with the modules highlighted in apricot Confidential Information of Huawei. No Spreading Without Permission Course Name P-39 XPUa Board The XPUa board performs the following functions: Main Processing Unit (MPU): manage the user panel resources, signaling panel resources, and the DSP status of the subrack Signaling Processing Unit (SPU): process the signaling Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page39 Port Name 10/100/1000BASE-T0 to 10/100/1000BASET3 Function Type RJ45 10M/100M/1000M Ethernet ports Confidential Information of Huawei. No Spreading Without Permission Course Name P-40 DPUc Board The DPUc board performs the following functions: Provides the speech format conversion and data forwarding functions Encodes and decodes voice services Provides the Tandem Free Operation (TFO) function Provides the voice enhancement function Detects voice faults automatically Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page40 Confidential Information of Huawei. No Spreading Without Permission Course Name P-41 DPUd Board The DPUd board performs the following functions: Processes the PS services on up to 1,024 simultaneously active PDCHs where signals are coded in MCS9 Processes packet links Detects packet faults automatically Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page41 Confidential Information of Huawei. No Spreading Without Permission Course Name P-42 Clock Synchronization Subsystem CN BITS MPS To BTS I N T I N T GCUa Clock module S C U a GPS 8kHz 19.44MHz, 32.768MHz,8kHz EPS To BTS I N T S C U a 8KHz S C U a EPS I N T To BTS 19.44MHz, 32.768MHz,8kHz 19.44MHz, 32.768MHz,8kHz Clock cable High-speed backplane channel Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page42 The clock synchronization subsystem can provide the following clock sources: Building Integrated Timing Supply System (BITS) clock, Global Positioning System (GPS) clock, LINE clock, and external 8 kHz clock. It ensures the reliability of the clock signals. The BSC6900 provides reference clock sources for base stations. Clock signals are transmitted from the BSC6900 to base stations over the Iub interface. The clock synchronization subsystem provides clock signals for the BSC6900, generates the RNC Frame Number (RFN), and provides reference clock signals for base stations. The position of the clock synchronization subsystem in the overall structure of the system. Confidential Information of Huawei. No Spreading Without Permission Course Name P-43 GCUa Board The GCUa board performs the following functions: Traces, generates, and maintains the synchronization clock The standby GCUa board traces the clock phase of the active GCUa board. This ensures the smooth output of the clock phase in the case of active/standby switchover Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page43 Confidential Information of Huawei. No Spreading Without Permission Course Name P-44 Interface Processing Subsystem Interface board category Board Type Transport Mode TDM Port Type Electrical port Optical port Electric al port Optical port FE/GE E1 STM-1 GE Board EIUa OIUa FG2c PEUa POUc GOUa INT IP Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page44 Confidential Information of Huawei. No Spreading Without Permission Course Name P-45 EIUa Board The EIUa board performs the following functions: Transmits, receives, encodes, and decodes 32 E1s/T1s Processes signals according to the LAPD protocol, SS7 MTP2 protocol Provides the Tributary Protect Switch (TPS) function between the active and standby EIUa boards Provides the OM links when the TCS is configured on the MSC side Supporting the A, Abis, and Ater interfaces Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page45 Confidential Information of Huawei. No Spreading Without Permission Course Name P-46 OIUa Board The OIUa board performs the following functions: Provides one STM-1 port for TDM transmission with the rate of 155.52 Mbit/s Processes signals according to the LAPD protocol, SS7 MTP2 protocol Provides the Automatic Protection Switching (APS) function between the active and standby OIUa boards Provides the OM links when the TCS is configured on the MSC side Supports the A, Abis, and Ater interfaces Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page46 Confidential Information of Huawei. No Spreading Without Permission Course Name P-47 FG2c Board The FG2c board performs the following functions: Provides 12 channels over FE ports or four channels over GE electrical ports Provides the routing-based backup and load sharing Supports the Abis, A, and Gb interfaces 10M/100M 10M/100M/1000M Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page47 As an interface board, the FG2c board supports IP over Ethernet transmission Port 10/100BASE-T 10/100/1000BASET 2M0 and 2M1 Function 10M/100M Ethernet ports, used to transmit 10/100M signals 10M/100M/1000M Ethernet ports, used to transmit 10/100/1000M signals Not used in RNC Connector Type RJ45 RJ45 SMB male connector Confidential Information of Huawei. No Spreading Without Permission Course Name P-48 PEUa Board The PEUa board performs the following functions: Provides 32 channels of E1s/T1s for HDLC transmission Provides the Tributary Protect Switch (TPS) function between the active and standby PEUa boards Transmits, receives, encodes, and decodes 32 channels of E1s/T1s. The E1 transmission rate is 2.048 Mbit/s; the T1 transmission rate is 1.544 Mbit/s. Supports the Abis and Gb interfaces Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page48 Ports on the PEUa Board Port Function Connecto r Type DB44 E1/T1 (0-7) E1/T1 port, used to transmit and receive E1/T1 signals on channels 0-7 E1/T1 port, used to transmit and receive E1/T1 signals on channels 8-15 E1/T1 port, used to transmit and receive E1/T1 signals on channels 16-23 E1/T1 port, used to transmit and receive E1/T1 signals on channels 24-31 Output ports for clock signals. These ports are used to transmit the 2 MHz line clock signals to the GCUa/GCGa board. The clock signals are extracted from upper-level devices and serve as the clock sources of the BSC6900 system. E1/T1 (8-15) DB44 E1/T1 (16-23) DB44 E1/T1 (24-31) DB44 2M0 and 2M1 SMB male Confidential Information of Huawei. No Spreading Without Permission Course Name P-49 POUc Board The POUc board performs the following functions: Provides four channels over channelized optical STM1/OC-3 ports based on IP protocol Supports the PPP function Extracts line clock signals Provides the Automatic Protection Switching (APS) function between the active and standby POUc boards Supports the A, Abis, Gb, Ater interfaces Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page49 Ports on the POUc Board Port RX TX 2M0 and 2M1 Function Optical port, used to transmit and receive optical signals. TX refers to the transmitting optical port, and RX refers to the receiving optical port. Output ports for clock signals. These ports are used to transmit the 2 MHz line clock signals to the GCUa/GCGa board. The clock signals are extracted from upper-level devices and serve as the clock sources of the BSC6900 system. Connector Type LC/PC SMB male connector Confidential Information of Huawei. No Spreading Without Permission Course Name P-50 GOUc Board The GOUc board performs the following functions: Provides four channels over GE optical ports Provides the routing-based backup and load sharing Extracts line clock signals Supports the Abis, A, and Gb interfaces Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page50 Ports on the GOUc board Port RX TX 2M0 and 2M1 Function Optical port, used to transmit and receive optical signals. TX refers to the transmitting optical port, and RX refers to the receiving optical port. Not used in RNC Connector Type LC/PC SMB male connector Confidential Information of Huawei. No Spreading Without Permission Course Name P-51 OM Subsystem S C U a Internal network S C U a S C U a EPS External network To M2000 O M U a HUB O M U a S C U a MPS Internet cable serial cable Alarm box LMT Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page51 The OM subsystem enables the management and maintenance of the BSC6900 in the following scenarios: routine maintenance, emergency maintenance, upgrade, and capacity expansion Confidential Information of Huawei. No Spreading Without Permission Course Name P-52 OMUa Board OMUa board is the Back Administration Module (BAM) of the BSC6900, it performs the following functions : Configuration management, performance management, fault management, security management, and loading management functions for the system Providing with the operation and maintenance interface for the LMT/M2000 users Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page52 (1) Captive screw (5) ALM LED (9) USB port (13) COM port (17) Hard disks (2) Ejector lever (6) ACT LED (10) ETH0 Ethernet port (14) VGA port (18) Screws for fixing the hard disk (3) Self-locking latch (7) RESET Button (11) ETH1 Ethernet port (15) HD LEDs (4) RUN LED (8) SHUTDOWN Button (12) ETH2 Ethernet port (16) OFFLINE LED Ports on the OMUa Board Port USB0-1 and USB2-3 ETH0 to ETH2 COM-ALM/COMBMC VGA Function USB ports. These ports are used to connect USB devices. GE ports. Serial port. This port is used for system commissioning or for common serial port usage. Monitor port Connector Type RJ45 DB-9 Confidential Information of Huawei. No Spreading Without Permission Course Name P-53 Contents 2. Hardware Structure 2.1 Cabinets 2.2 Subracks 2.3 Boards 2.4 Cables Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page53 Confidential Information of Huawei. No Spreading Without Permission Course Name P-54 Main Cables Trunk Cables 75Ω coaxial cable and Active/Standby 75-ohm coaxial cable 120Ω twisted pair cable and Active/Standby 120Ω twisted pair cable Network cables Optical Fibers Y-Shaped Clock Cable PDB Monitoring Signal Cable Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page54 Confidential Information of Huawei. No Spreading Without Permission Course Name P-55 Trunk Cables 75-ohm Coaxial Cable /120-ohm Twisted Pair Cable (1) DB44 connector (3) Label (Identifying a coaxial cable/twisted pair cable) (2) Main label (Identifying the code, version, and manufacturer information of the cable) (4) Metal case of the DB44 connector Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page55 The 75-ohm coaxial cable is a type of trunk cable. It is optional. The number of 75ohm coaxial cables to be installed depends on site requirements. This cable connects the active/standby AEUa/PEUa board to the Digital Distribution Frame (DDF) or other NEs and transmits E1 trunk signals. The 75-ohm coaxial cable used in the BSC6900 has 2 x 8 cores. That is, the 75-ohm coaxial cable is composed of two cables, each of which contains eight micro coaxial cables. All of the 16 micro coaxial cables form eight E1 RX/TX links. The 75-ohm coaxial cable has a DB44 connector at only one end. You need to make a connector at the other end as required on site. The 120-ohm twisted pair cable is a type of trunk cable. It is optional. The number of 120-ohm twisted pair cables to be installed depends on site requirements. This cable connects the active/standby AEUa/PEUa board to the DDF or other NEs and transmits E1 signals. The 120-ohm twisted pair cable has a DB44 connector at only one end. You need to make a connector at the other end as required on site. Confidential Information of Huawei. No Spreading Without Permission Course Name P-56 Trunk Cables (Cont.) Active/Standby 75-ohm Coaxial Cable (1) DB44 connector (3) Label (Identifying a coaxial cable) (5) Label 2 (identifying a coaxial cable) (2) Metal case of the DB44 connector (4) Main label (identifying the code, version, and manufacturer information of the cable) Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page56 The active/standby 75-ohm coaxial cable has two DB44 connectors at only one end. You need to make connectors at the other end as required on site. Confidential Information of Huawei. No Spreading Without Permission Course Name P-57 Trunk Cables (Cont.) Active/Standby 120-ohm Twisted Pair Cable (1) DB44 connector (3) Label 1 (identifying a twisted pair cable) (5) Label 2 (identifying a twisted pair cable) (2) Metal case of the DB44 connector (4) Main label (identifying the code, version, and manufacturer information of the cable) Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page57 The 120-ohm twisted pair cable has a DB44 connector at only one end. You need to make a connector at the other end as required on site. Confidential Information of Huawei. No Spreading Without Permission Course Name P-58 Ethernet Cable Straight-Through Cable Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page58 The straight-through cable is of two types: the shielded straight-through cable and the unshielded straight-through cable. The unshielded straight-through cable is used to connect the SCUa boards in different subracks. The shielded straight-through cable is used to connect the FG2a/OMUa/FG2c board to other devices. The number of straight-through cables to be installed depends on the site requirements. Confidential Information of Huawei. No Spreading Without Permission Course Name P-59 Optical Cables Optical cables are used to connect the optical interface board to the Optical Distribution Frame (ODF) or other NEs. Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page59 The optical cable has an LC/PC connector at one end connected to the optical interface board in the BSC6900. The other end of the optical cable can use an LC/PC connector, SC/PC connector, or FC/PC connector. Confidential Information of Huawei. No Spreading Without Permission Course Name P-60 Y-Shaped Clock Cable This cable transmits the 8 kHz clock signals from the GCUa/GCGa board in the MPS to the SCUa board in the EPS. (1) Label (identifying a pair of twisted pair cables) (2) RJ45 connector Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page60 When the straight-through cable is used to connect the SCUa boards of different subracks, the two ends of the cable are connected to the SCUa boards which are located in different subracks. When the straight-through cable is used to connect the OMUa board to the LAN of the customer, the RJ45 connector at one end of the cable is connected to the ETH0 or the ETH1 port on the OMUa board, and the RJ45 connector at the other end of the cable is connected to the Ethernet port of the LAN of the customer. Confidential Information of Huawei. No Spreading Without Permission Course Name P-61 PDB Monitoring Signal Cable The power distribution box (PDB) monitoring signal cable is used to transmit monitoring signals from the PDB to the subracks. Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page61 The DB15 connector at one end of the PDB monitoring signal cable is connected to the port on the PDB for the service subrack. The DB9 connector at the other end of the cable is connected to the MONITOR port on the metal shielding board of the lowest subrack in the cabinet. Confidential Information of Huawei. No Spreading Without Permission Course Name P-62 Questions How many subsystems does BSC6900 have? And what are they? How to set the dip switches for MPS? Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page62 Confidential Information of Huawei. No Spreading Without Permission Course Name P-63 Contents 1. System Description 2. Hardware Structure 3. System Signal Flow 4. Typical Configuration Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page63 Confidential Information of Huawei. No Spreading Without Permission Course Name P-64 BSC6900 Signal Flows User-Plane Signal Flow GSM CS Signal Flow GSM PS Signal Flow Control-Plane Signal Flow Signaling Flow on the A Interface Signaling Flow on the Abis Interface Signaling Flow on the Gb Interface Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page64 Confidential Information of Huawei. No Spreading Without Permission Course Name P-65 GSM CS Signal Flow Abis over TDM and A over TDM Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page65 the CS signal flow on the uplink is as follows: The uplink CS signals are sent from the BTS to the Abis interface board in the MPS/EPS. The CS signals are demultiplexed in the Abis interface board. Each CS signal uses a 64 kbit/s timeslot and is transmitted to the Ater interface board through the TNUa board. The CS signals are multiplexed in the Ater interface board. Each full-rate CS signal uses a 16 kbit/s sub-timeslot, and each half-rate CS signal uses an 8 kbit/s sub-timeslot. The CS signals are then transmitted to the Ater interface board in the TCS over the Ater interface. The CS signals are demultiplexed in the Ater interface board of the TCS. Each CS signal uses a 64 kbit/s timeslot and is transmitted to the DPUc board through the TNUa board. The DPUc board performs speech codec and rate adaptation on the CS signals, which are converted into 64 kbit/s PCM signals. The 64 kbit/s PCM signals are transmitted to the A interface board through the TNUa board and then to the MSC over the A interface. Confidential Information of Huawei. No Spreading Without Permission Course Name P-66 GSM CS Signal Flow Abis over HDLC/IP and A over TDM Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page66 the CS signal flow on the uplink is as follows: The uplink CS signals are sent from the BTS to the Abis interface board in the MPS/EPS. The CS signals are transmitted from the Abis interface board to the DPUc board through the SCUa board. The DPUc board reorders PTRAU frames, eliminates jitter, and converts PTRAU frames into TRAU frames. Then, the TRAU frames are transmitted to the Ater interface board through the TNUa board. The CS signals are multiplexed in the Ater interface board in the MPS/EPS, and then are transmitted to the Ater interface board in the TCS. The CS signals are demultiplexed in the Ater interface board of the TCS. Each CS signal uses a 64 kbit/s timeslot and is transmitted to the DPUc board through the TNUa board. The DPUc board performs speech codec and rate adaptation on the CS signals, which are converted into 64 kbit/s PCM signals. The 64 kbit/s PCM signals are transmitted to the A interface board through the TNUa board and then to the MSC over the A interface. Confidential Information of Huawei. No Spreading Without Permission Course Name P-67 GSM CS Signal Flow Abis over HDLC/IP and A over IP Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page67 the CS signal flow on the uplink is as follows: The uplink CS signals are sent from the BTS to the Abis interface board in the MPS/EPS. The Abis interface board encapsulates the CS signals in PTRAU frames, which are then transmitted to the DPUc board through the SCUa board. The DPUc board converts PTRAU frames into RTP frames, reorders RTP frames, and eliminates jitter. The SCUa board transmits the CS signals to the A interface board, and then the A interface board transmits the signals to the MGW over the A interface. Confidential Information of Huawei. No Spreading Without Permission Course Name P-68 GSM PS Signal Flow Abis over TDM Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page68 the PS signal flow on the uplink is as follows: The packet data is sent from the BTS to the Abis interface board in the MPS/EPS. The data uses one to four 16 kbit/s sub-timeslots on the Abis interface, depending on the modulation and coding scheme, for example, CS1-CS4 or MCS1-MCS9. The Abis interface board transmits the packet data to the TNUa board, which then transmits the data to the DPUd board. The DPUd board converts the frame format and then transmits the data to the Gb interface board through the SCUa board. The Gb interface board processes the packet data according to the IP or FR protocol and then transmits it to the SGSN over the Gb interface. Confidential Information of Huawei. No Spreading Without Permission Course Name P-69 Signaling Flow on the A Interface A over TDM Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page69 the uplink signaling flow on the A interface is as follows: In the MPS/EPS, the signaling processing board processes the signaling according to the MTP3, SCCP, and BSSAP protocols. Then, the signaling is transmitted to the Ater interface board through the SCUa board. The Ater interface board processes the signaling according to the MTP2 protocol. Then, the signaling is transmitted to the Ater interface board in the TCS. In the TCS, the Ater interface board transparently transmits the signaling to the TNUa board and then to the A interface board. Then, the signaling is transmitted to the MSC over the A interface. Confidential Information of Huawei. No Spreading Without Permission Course Name P-70 Signaling Flow on the A Interface A over IP Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page70 the uplink signaling flow on the A interface is as follows: In the MPS/EPS, the signaling processing board processes the signaling according to the BSSAP, SCCP, SCTP, and M3UA protocols. Then, the signaling is transmitted to the A interface board through the SCUa board. The A interface board processes the signaling according to the IP protocol. Then, the signaling is transmitted to the MSC server through the MGW. Confidential Information of Huawei. No Spreading Without Permission Course Name P-71 Signaling Flow on the Abis Interface Abis over TDM/IP/HDLC Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page71 the uplink signaling flow on the Abis interface is as follows: The signaling is transmitted to the Abis interface board in the MPS/EPS over the Abis interface and then transmitted to the SCUa board. The SCUa board transmits the signaling to the signaling processing board. Confidential Information of Huawei. No Spreading Without Permission Course Name P-72 Signaling Flow on the Gb Interface Gb over IP/HDLC Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page72 the uplink signaling flow on the Gb interface is as follows: In the MPS/EPS, the signaling processing board processes the signaling according to the NS and BSSGP protocols. Then, the signaling is transmitted to the Gb interface board through the SCUa board. The Gb interface board processes the signaling according to the IP or FR protocol. Then, the signaling is transmitted to the SGSN over the Gb interface. Confidential Information of Huawei. No Spreading Without Permission Course Name P-73 Contents 1. System Description 2. Hardware Structure 3. System Signal Flow 4. Typical Configuration Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page73 Confidential Information of Huawei. No Spreading Without Permission Course Name P-74 Typical Configuration of BSC6900 When the R11 boards are configured Index Number of cabinets BHCA(K) Traffic（Erl） TRX number 1MPS+1TC S 2 1312 4875 768 MPS MPR TCS TCR Number of active PDCHs 3072 （MCS-9） Gb interface throughput （Mbps） Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. 395 Page74 Confidential Information of Huawei. No Spreading Without Permission Course Name P-75 Typical Configuration of BSC6900 When the R11 boards are configured Index Number of cabinets BHCA(K) Traffic（Erl） TRX number 1MPS+1EPS+2TC Ss 2 3281 12187 1920 MPS MPR TCS TCR EPS TCS Number of active PDCHs 7680 （MCS-9） Gb interface throughput （Mbps） Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. 790 Page75 Confidential Information of Huawei. No Spreading Without Permission Course Name P-76 Typical Configuration of BSC6900 When the R11 boards are configured Index Number of cabinets BHCA(K) Traffic（Erl） TRX number 1MPS+2EPSs+2TC Ss 2 EPS 5250 19500 3072 MPS MPR TCS TCR EPS TCS Number of active PDCHs 12288 （MCS-9） Gb interface throughput （Mbps） Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. 790 Page76 Confidential Information of Huawei. No Spreading Without Permission Course Name P-77 Summary After this course, we have learned the position of BSC6900 in GSM network, and the specifications of cabinets, subracks, boards, cables, functions of subsystems, signal flows of control-plane and user-plane of each interfaces. At last, we learned typical configuration of BSC6900 Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page77 Confidential Information of Huawei. No Spreading Without Permission Course Name P-78 Glossary EPS: Extended Processing Subrack MPS: Main Processing Subrack TCS: TransCoder Subrack LMT: Local Maintenance Terminal Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page78 Confidential Information of Huawei. No Spreading Without Permission Course Name P-79 Thank you www.huawei.com Confidential Information of Huawei. No Spreading Without Permission Course Name P-80 Appendix 1: Training Icons Foreword Reference Objectives Contents Question Summary Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page80 Confidential Information of Huawei. No Spreading Without Permission Course Name P-81 Color Usage Color Usage Guidelines: The following colors are corporate colors and supporting colors . Wit both usage of colors creates an harmonies effect. The value of the colors should not be changed. No other colors should be used. Only the suggested colors can be used. For the usage of the supporting colors, only vertical and horizontal should be used thus able to reflex the harmony. Color platelet: Corporate Colors RGB:153/0/0 RGB:0/0/0 RGB:51/51/51 RGB:153/153/153 RGB:204204 RGB:255/255/255 Supporting Colors RGB:255/204/102 RGB:255/204/153 RGB:204/255/153 RGB:204/204/255 RGB:153/204/255 RGB:153/204/204 RGB:153/102/10 RGB:255/153/0 RGB:102/153/0 RGB:0/102/153 RGB:0/153/204 RGB:0/153/153 Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved. Page81 Confidential Information of Huawei. No Spreading Without Permission