BSC6900 GU Technical Description(V900R013C00_Draft a)(PDF)-En

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BSC6900 GU

V900R013C00

Technical Description

Issue Draft A

Date 2011-01-31

HUAWEI TECHNOLOGIES CO., LTD.


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Copyright Huawei Technologies Co., Ltd. 2011. All rights reserved.

No part of this document may be reproduced or transmitted in any form or by any means without prior written

consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and the

customer. All or part of the products, services and features described in this document may not be within the

purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,and recommendations in this document are provided "AS IS" without warranties, guarantees or representations

of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the

preparation of this document to ensure accuracy of the contents, but all statements, information, and

recommendations in this document do not constitute the warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang

Shenzhen 518129

People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

Issue Draft A (2011-01-31) Huawei Proprietary and Confidential

Copyright Huawei Technologies Co., Ltd.

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About This Document

Purpose

This document describes the structure, working principles, signal flows, and transmission and

networking of the BSC6900. It helps the reader understand the implementation and working

principles of the BSC6900.

Product Version

The following table lists the product version related to the document.

Product Name Product Version

BSC6900 V900R013C00

Intended Audience

This document is intended for:

l Network planners

l System engineers

l Field engineers

Organization

1 Changes in the BSC6900 GU Technical Description

This document describes the changes in the BSC6900 GU Technical Description.

2 Hardware Configuration Modes

The BSC6900 supports flexible hardware configuration mode, which varies according to the

scenario.

3 Overall Structure

This chapter describes the interactions between the modules in the BSC6900.

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4 Working Principles

This chapter describes the working principles of the BSC6900 in the following ways: power

supply, environment monitoring, clock synchronization, and OM.

5 Signal Flow

The BSC6900 signal flow consists of the user-plane signal flow, control-plane signal flow, and

OM signal flow.

6 Transmission and Networking

The transmission and networking between the BSC6900 and other NEs can be classified into

the following types: transmission and networking on the A/Gb interface, on the Abis interface,

on the Ater interface, on the Pb interface, on the Iub interface, and on the Iu/Iur interface.

7 Parts Reliability

The BSC6900 guarantees its operation reliability by means of board redundancy and portredundancy.

Conventions

Symbol Conventions

The symbols that may be found in this document are defined as follows.

Symbol Description

Indicates a hazard with a high level of risk, which if not

avoided, will result in death or serious injury.

Indicates a hazard with a medium or low level of risk, which

if not avoided, could result in minor or moderate injury.

Indicates a potentially hazardous situation, which if not

avoided, could result in equipment damage, data loss,

performance degradation, or unexpected results.

Indicates a tip that may help you solve a problem or save

time.

Provides additional information to emphasize or supplement

important points of the main text.

General Conventions

The general conventions that may be found in this document are defined as follows.

Convention Description

Times New Roman Normal paragraphs are in Times New Roman.

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Boldface Names of files, directories, folders, and users are in

boldface. For example, log in as user root.

Italic Book titles are in italics.

Courier New Examples of information displayed on the screen are in

Courier New.

Command Conventions

The command conventions that may be found in this document are defined as follows.


Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italics.

[ ] Items (keywords or arguments) in brackets [ ] are optional.

{ x | y | ... } Optional items are grouped in braces and separated by

vertical bars. One item is selected.

[ x | y | ... ] Optional items are grouped in brackets and separated by

vertical bars. One item is selected or no item is selected.

{ x | y | ... }*

Optional items are grouped in braces and separated byvertical bars. A minimum of one item or a maximum of all

items can be selected.

[ x | y | ... ]* Optional items are grouped in brackets and separated by

vertical bars. Several items or no item can be selected.

GUI Conventions

The GUI conventions that may be found in this document are defined as follows.


Boldface Buttons, menus, parameters, tabs, window, and dialog titles

are in boldface. For example, click OK.

> Multi-level menus are in boldfaceand separated by the ">"

signs. For example, choose File> Create> Folder.

Keyboard Operations

The keyboard operations that may be found in this document are defined as follows.

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Format Description

Key Press the key. For example, press Enterand press Tab.

Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt

+Ameans the three keys should be pressed concurrently.

Key 1, Key 2 Press the keys in turn. For example, pressing Alt, Ameans

the two keys should be pressed in turn.

Mouse Operations

The mouse operations that may be found in this document are defined as follows.

Action Description

Click Select and release the primary mouse button without moving

the pointer.

Double-click Press the primary mouse button twice continuously and

quickly without moving the pointer.

Drag Press and hold the primary mouse button and move the

pointer to a certain position.

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Contents

About This Document...................................................................................................................iii

1 Changes in the BSC6900 GU Technical Description...........................................................1-1

2 Hardware Configuration Modes.............................................................................................2-1

3 Overall Structure........................................................................................................................3-1

3.1 Switching Subsystem.............................................................................. ........................................................3-5

3.2 Service Processing Subsystem......................................................................................................................3-10

3.3 Interface Processing Subsystem....................................................................................................................3-12

3.4 Clock Synchronization Subsystem................................................................................................................3-13

3.5 OM Subsystem..............................................................................................................................................3-14

4 Working Principles....................................................................................................................4-1

4.1 Power SupplyPrinciple...................................................................................................................................4-2

4.2 Environment Monitoring Principle.................................................................................................................4-34.3 Clock Synchronization Principle.....................................................................................................................4-6

4.3.1 Clock Sources.........................................................................................................................................4-6

4.3.2 Structure of the clock synchronization subsystem.................................................................................4-7

4.3.3 Clock Synchronization Process..............................................................................................................4-9

4.3.4 RFN Generation and Reception...........................................................................................................4-11

4.4 OM Principle.................................................................................................................................................4-12

4.4.1 DualOM Plane.....................................................................................................................................4-13

4.4.2 OMNetwork............................................................................ ............................................................4-14

4.4.3 Active/Standby Workspaces................................................................................................................4-16

4.4.4 DataConfiguration Management.........................................................................................................4-18

4.4.5 Security Management...........................................................................................................................4-21

4.4.6 Performance Management....................................................................................................................4-25

4.4.7 Alarm Management..............................................................................................................................4-26

4.4.8 Loading Management...........................................................................................................................4-28

4.4.9 Upgrade Management..........................................................................................................................4-32

4.4.10 BTS Loading Management................................................................................................................4-34

4.4.11 BTS Upgrade Management................................................................................................................4-35

5 Signal Flow..................................................................................................................................5-1

5.1 User-Plane Signal Flow...................................................................................................................................5-2

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5.1.1 GSM CS Signal Flow.............................................................................................................................5-2

5.1.2 GSM PS Signal Flow.............................................................................................................................5-7

5.1.3 UMTS Signal Flow Between Iub and Iu-CS/Iu-PS...............................................................................5-9

5.1.4 CBC Signal Flow.................................................................................................................................5-11

5.2 Control-Plane Signal Flow............................................................................................................................5-13

5.2.1 Signaling Flow on the A Interface.......................................................................................................5-13

5.2.2 Signaling Flow on the Abis Interface...................................................................................................5-15

5.2.3 Signaling Flow on the Gb Interface.....................................................................................................5-17

5.2.4 Signaling Flow on the Pb Interface......................................................................................................5-17

5.2.5 Signaling Flow on the Uu Interface.....................................................................................................5-18

5.2.6 Signaling Flow on the Iub Interface ....................................................................................................5-20

5.2.7 Signaling Flow on the Iu/Iur Interface ................................................................................................5-21

5.3 OM Signal Flow............................................................................................................................................5-22

6 Transmission and Networking................................................................................................6-1

6.1 Transmission and Networking on the A/Gb Interface.....................................................................................6-2

6.1.1 TDM-Based Networking on the A/Gb Interface....................................................................................6-2

6.1.2 IP-Based Networking on the A/Gb Interface.........................................................................................6-3

6.2 Transmission and Networking on the Abis Interface......................................................................................6-4

6.2.1 TDM-Based Networking on the Abis Interface.....................................................................................6-4

6.2.2 IP-Based Networking on the Abis Interface...........................................................................................6-5

6.3 Transmission and Networking on the Ater Interface......................................................................................6-7

6.3.1 TDM-Based Networking on the Ater Interface......................................................................................6-7

6.3.2 IP-Based Networking on the Ater Interface...........................................................................................6-86.4 Transmission and Networking on the Pb Interface.........................................................................................6-8

6.5 Transmission and Networking on the Iu/Iur Interface ...................................................................................6-9

6.5.1 ATM-Based Networking on the Iu/Iur Interface....................................................................................6-9

6.5.2 IP-Based Networking on the Iu/Iur Interface.......................................................................................6-14

6.6 Transmission and Networking on the Iub Interface......................................................................................6-20

6.6.1 ATM-Based Networking on the Iub Interface.....................................................................................6-21

6.6.2 IP-Based Networking on the Iub Interface...........................................................................................6-23

6.6.3 ATM/IP-Based Networking on the Iub Interface.................................................................................6-25

7 Parts Reliability..........................................................................................................................7-17.1 Concepts Related to Parts Reliability..............................................................................................................7-2

7.1.1 Backup....................................................................................................................................................7-2

7.1.2 Resource Pool.........................................................................................................................................7-3

7.1.3 Port Trunking.........................................................................................................................................7-3

7.1.4 Port Load Sharing...................................................................................................................................7-4

7.2 Board Redundancy..........................................................................................................................................7-4

7.2.1 Backup of AEUa Boards........................................................................................................................7-5

7.2.2 Backup of EIUa Boards..........................................................................................................................7-6

7.2.3 Backup of OIUa Boards.........................................................................................................................7-6

7.2.4 Backup of PEUa Boards.........................................................................................................................7-7

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7.2.5 Backup of SCUa/SCUb Boards..............................................................................................................7-8

7.2.6 Backup of TNUa Boards........................................................................................................................7-8

7.2.7 Backup of AOUa/AOUc Boards............................................................................................................7-9

7.2.8 Backup of FG2a/FG2c Boards.............................................................................................................7-10

7.2.9 Backup of GCUa/GCGa Boards..........................................................................................................7-11

7.2.10 Backup of GOUa/GOUc Boards........................................................................................................7-12

7.2.11 Backup of OMUa/OMUb/OMUc Boards..........................................................................................7-13

7.2.12 Backup of POUa/POUc Boards.........................................................................................................7-14

7.2.13 Backup of UOIa/UOIc Boards...........................................................................................................7-14

7.2.14 Backup of XPUa/XPUb/SPUa/SPUb Boards....................................................................................7-15

7.2.15 Resource Pool of DPUa/DPUb/DPUc/DPUd/DPUe/DPUf/DPUg Boards........................................7-16

7.3 Port Redundancy...........................................................................................................................................7-17

7.3.1 Optical Port Backup.............................................................................................................................7-17

7.3.2 FE/GE Port Backup..............................................................................................................................7-18

7.3.3 Port Load Sharing.................................................................................................................................7-18

7.3.4 Port Trunking.......................................................................................................................................7-19

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Figures

Figure 3-1Structure of the host software.............................................................................................................3-2

Figure 3-2Structure of the OMU software..........................................................................................................3-2

Figure 3-3Logical structure of MPS/EPS............................................................................................................3-3

Figure 3-4Logical structure of TCS.................................................................................................................... 3-3

Figure 3-5Position of the switching subsystem in the BSC6900 system............................................................3-5

Figure 3-6Position of the switching subsystem in the TCS................................................................................ 3-6

Figure 3-7Network topologies between subracks...............................................................................................3-7

Figure 3-8Interconnections between subracks through the crossover cables between the SCUa boards (MPS/EPS)

...............................................................................................................................................................................3-7

Figure 3-9Interconnections between subracks through the crossover cables between the SCUa boards (TCS)

...............................................................................................................................................................................3-8

Figure 3-10Interconnections between subracks through the crossover cables between the SCUb boards (MPS/

EPS).......................................................................................................................................................................3-8

Figure 3-11Interconnections between subracks through the crossover cables between the SCUb boards (TCS)

...............................................................................................................................................................................3-9Figure 3-12Interconnections between subracks through the inter-TNUa cables (MPS/EPS).............................3-9

Figure 3-13Interconnections between subracks through the inter-TNUa cables (TCS)...................................3-10

Figure 3-14Service processing subsystem........................................................................................................3-11

Figure 3-15Position of the interface processing subsystem in the MPS/EPS...................................................3-12

Figure 3-16Position of the interface processing subsystem in the TCS............................................................3-13

Figure 3-17Position of the clock synchronization subsystem in the BSC6900 system....................................3-14

Figure 3-18Position of the OM subsystem in the BSC6900 system.................................................................3-15

Figure 4-1Power input part of the BSC6900.......................................................................................................4-2

Figure 4-2Working principle of power monitoring.............................................................................................4-3

Figure 4-3Working principle of fan monitoring..................................................................................................4-4

Figure 4-4Working principle of environment monitoring...................................................................................4-5

Figure 4-5Structure of the clock synchronization subsystem..............................................................................4-8

Figure 4-6Structure of the clock synchronization subsystem..............................................................................4-9

Figure 4-7Process of clock synchronization in the MPS/EPS (1).....................................................................4-10

Figure 4-8Process of clock synchronization in the MPS/EPS (2).....................................................................4-10

Figure 4-9Process of clock synchronization in the TCS...................................................................................4-11

Figure 4-10Process of RFN generation and reception......................................................................................4-12

Figure 4-11Dual OM plane...............................................................................................................................4-14

Figure 4-12Structure of the OM network..........................................................................................................4-15

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Figure 4-13Principle of effective mode configuration......................................................................................4-18

Figure 4-14Principle of ineffective mode configuration...................................................................................4-19

Figure 4-15Check of the data consistency between the OMU and the host boards..........................................4-21

Figure 4-16Process of collecting performance measurement data periodically................................................4-25

Figure 4-17Alarm management process............................................................................................................4-27

Figure 4-18Working principle of the alarm box................................................................................................4-27

Figure 4-19Loading process (1)........................................................................................................................4-29



Figure 4-22Upgrade through the OM network..................................................................................................4-32

Figure 4-23Upgrade process............................................................... ..............................................................4-33

Figure 5-1GSM CS signal flow (1).....................................................................................................................5-2








Figure 5-9GSM PS signal flow (1)......................................................................................................................5-8

Figure 5-10GSM PS signal flow (2)....................................................................................................................5-9

Figure 5-11Intra-BSC6900 data flow between Iub and Iu-CS/Iu-PS................................................................5-10

Figure 5-12Inter-BSC6900 data flow between Iub and Iu-CS/Iu-PS................................................................5-11Figure 5-13Signal flow from Iu-BC/CBC-BSC to Iub/Abis.............................................................................5-12

Figure 5-14Signaling flow on the A interface in A over TDM mode (BM/TC separated)...............................5-14

Figure 5-15Signaling flow on the A interface in A over TDM mode (BM/TC combined)..............................5-14

Figure 5-16Signaling flow on the A interface in A over IP mode....................................................................5-15

Figure 5-17Signaling flow on the Abis interface in Abis over TDM mode......................................................5-16

Figure 5-18Signaling flow on the Abis interface in Abis over IP mode...........................................................5-16

Figure 5-19Signaling flow on the Gb interface.................................................................................................5-17

Figure 5-20Signaling flow on the Pb interface.................................................................................................5-18

Figure 5-21Intra-BSC6900 signaling flow on the Uu interface........................................................................5-19

Figure 5-22Inter-BSC6900 signaling flow on the Uu interface........................................................................5-20

Figure 5-23Signaling flow on the Iub interface................................................................................................5-21

Figure 5-24Signaling flow on the Iu/Iur interface.............................................................................................5-22

Figure 5-25OM signal flow (BM/TC separated)...............................................................................................5-23

Figure 5-26OM signal flow (BM/TC combined)..............................................................................................5-24

Figure 6-1TDM-based networking on the A interface in local TCS mode.........................................................6-2

Figure 6-2TDM-based networking on the A interface in remote TCS mode......................................................6-2

Figure 6-3TDM-based networking on the Gb interface......................................................................................6-3

Figure 6-4IPover E1 networking on the A interface..........................................................................................6-3

Figure 6-5IPover Ethernet networking on the A/Gb interface...........................................................................6-4

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Figure 6-6TDM-based networking on the Abis interface...................................................................................6-5

Figure 6-7IP over E1 Networking.......................................................................................................................6-5

Figure 6-8IP over Ethernet networking (layer 2)................................................................................................6-6

Figure 6-9IP over Ethernet networking (layer 3)................................................................................................6-6

Figure 6-10TDM-based networking on the Ater interface..................................................................................6-7

Figure 6-11IP-based networking on the Ater interface.......................................................................................6-8

Figure 6-12TDM-based networking on the Pb interface.....................................................................................6-8

Figure 6-13SDH-based networking with MSP backup between optical ports..................................................6-10

Figure 6-14SDH-based networking with load sharing between optical ports...................................................6-11

Figure 6-15SDH-based networking with STM-1 shared between Iu and Iur...................................................6-12

Figure 6-16ATM-based networking..................................................................................................................6-13

Figure 6-17Single-homing layer 3 networking.................................................................................................6-15

Figure 6-18Dual-homing layer 3 networking....................................................................................................6-16

Figure 6-19Direct connection with load sharing...............................................................................................6-17

Figure 6-20SDH-based networking with MSP backup between optical ports..................................................6-17

Figure 6-21SDH-based networking with load sharing between optical ports...................................................6-18

Figure 6-22SDH-based networking with STM-1 shared between Iu and Iur...................................................6-19

Figure 6-23ATM over E1/STM-1 networking (transparent TDM transmission).............................................6-21

Figure 6-24ATM over E1 networking (ATM transmission convergence)........................................................6-21

Figure 6-25ATM over STM-1 networking (ATM transmission convergence).................................................6-22

Figure 6-26IP over E1 networking....................................................................................................................6-23

Figure 6-27IP over Ethernet networking (layer 2)............................................................................................6-23

Figure 6-28IP over Ethernet networking (layer 3)............................................................................................6-24Figure 6-29IP networking based on hybrid transport........................................................................................6-24

Figure 6-30ATM/IP-based networking on the Iub interface.............................................................................6-25

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Tables

Table 3-1Components of the BSC6900 cabinet..................................................................................................3-1

Table 4-1Definitions of the user rights..............................................................................................................4-22

Table 4-2Types of logs......................................................................................................................................4-24

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1Changes in the BSC6900 GU TechnicalDescription

This document describes the changes in the BSC6900 GU Technical Description.

Draft A (2011-01-31)

This is the Draft A release of V900R013C00.

Compared with issue 03 (2010-09-20) of V900R012C01, this issue does not include any new

topics.

Compared with issue 03 (2010-09-20) of V900R012C01, this issue incorporates the following

changes.

Content Description

3.1 Switching Subsystem The description of the inter-subrack

switching principle when the SCUb is

configured is added.

7.2.5 Backup of SCUa/SCUb Boards The description of the SCUb board is added.

7.2.11 Backup of OMUa/OMUb/OMUc

Boards

The description of the OMUc board is added.

7.2.15 Resource Pool of DPUa/DPUb/

DPUc/DPUd/DPUe/DPUf/DPUg Boards

The description of the DPUf/DPUg board is

added.

Compared with issue 03 (2010-09-20) of V900R012C01, this issue does not exclude any topics.

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2Hardware Configuration ModesThe BSC6900 supports flexible hardware configuration mode, which varies according to the

scenario.

Configuration of Subracks

The subracks of the BSC6900 are classified into the main processing subrack (MPS) and the

extended processing subrack (EPS). If the BSC6900 is deployed in the GSM network, the

transcoder subrack (TCS) may exist. In this case, the MPS and EPS are collectively known as

basic module (BM) subrack, and the TCS is known as TC subrack.

Subrack Configuration Modes

NOTE

When the BSC6900 is deployed in the UMTS network, the subrack configuration modes mentioned earlier are

no longer applicable.

When the BSC6900 is deployed in the GSM network, three subrack configuration modes are

supported:

l BM/TC separated

In BM/TC separated mode, the BSC6900 is configured with the MPS, EPS, and TCS (local

or remote).

Characteristics: In this mode, the installation location of the TCS is flexible. The TCS can

be installed in the transcoder rack (TCR) and be placed on the CN side, thus saving the

transmission resources between the BSC6900 and the CN. Alternatively, the TCS can be

installed in the same cabinet as the MPS or EPS and be placed on the BSC6900 side.

l BM/TC combined

In BM/TC combined mode, the boards of the TCS are installed in the MPS or in the EPS,

with the subrack names unchanged.

Characteristics: The BSC6900 in this mode has higher hardware integration, and fewer

cabinets and subracks when the capacity is the same, than in the BM/TC separated mode.

l A over IP

In A over IP mode, layer 3 (network layer) of the protocol stack on the A interface adopts

the IP protocol. In this case, the BSC6900 is configured with the MPS and EPS but notwith the TCS. The TC function is performed by the Media Gateway (MGW).

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Characteristics: In this mode, the BSC6900 has fewer cabinets and subracks. It must be

interconnected with a specific MGW.

One BSC6900 uses only one configuration mode.

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3Overall StructureAbout This Chapter

This chapter describes the interactions between the modules in the BSC6900.

Physical Structure

The BSC6900 cabinet consists of power distribution boxes and subracks, as listed in Table

3-1.

Table 3-1Components of the BSC6900 cabinet

Component Configuration

MPS One MPS must be configured.

EPS Zero to five EPSs can be configured.

TCS Zero to four TCSs can be configured.

Independent fan subrack Each cabinet must be configured with one independent fan

subrack.

Power distribution box Each cabinet must be configured with one power distribution

box.

NOTE

If the customer purchase the Nastar product of Huawei, the customer needs to install the SAU board in the MPS

or EPS of the BSC6900 cabinet (the SAU board occupies two slots that work in active/standby mode). For details

on how to install the SAU board, how to install the software on the SAU board, and how to maintain the SAU

board, see the SAU User Guideof Nastar documents.

Software Structure

The software of the BSC6900 has a distributed architecture. It is classified into the host softwareand OMU software.

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l Host software

The host software is distributed on the service boards. It consists of the operating system,

middleware, and application software. See Figure 3-1.

Figure 3-1Structure of the host software

Operating system

The VxWorks real-time embedded operating system runs on each service board.

Middleware

The Versatile Protocol Platform (VPP) and the Virtual Operating System (VOS)

function as the middleware. The middleware enables the upper-layer application

software to be independent from the lower-layer operating system so that software

functions can be transplanted between different platforms.

Application software

Boards of different types can be installed with different application software. The

application software is classified into radio resource processing software, resource

control-plane processing software, base station management software, andconfiguration maintenance management software.

l OMU software

The Operation and Maintenance Unit (OMU) software runs on the OMUa board, OMUb

board, OMUc board, and GBAM. The OMU is responsible for the operation and

maintenance of the BSC6900. The OMU software consists of the operating system and the

OMU application software. See Figure 3-2.

Figure 3-2Structure of the OMU software

Operating system

The Dopra Linux, Suse Linux, or Windows Server 2003 operating system is used.

OMU application software

The OMU application software runs on the lower-level operating system and provides

various service processes, including the LMT process, fault diagnosis process, andauthentication process.

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Logical Structure

Figure 3-3and Figure 3-4show the logical structure of the BSC6900.

Figure 3-3Logical structure of MPS/EPS

Figure 3-4Logical structure of TCS

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Subsystems

Logically, the BSC6900 consists of the following five subsystems:

3.1 Switching Subsystem

The switching subsystem performs switching of traffic data, signaling, and OM signals.

3.2 Service Processing Subsystem

The BSC6900 service processing subsystem performs the control functions defined in the 3GPP

protocols and processes services of the BSC6900.

3.3 Interface Processing Subsystem

The interface processing subsystem provides transmission ports and resources, processes

transport network messages, and enables interaction between the BSC6900 internal data and

external data.

3.4 Clock Synchronization Subsystem

The clock synchronization subsystem provides clock signals for the BSC6900, generates the

RNC Frame Number (RFN), and provides reference clock signals for base stations.

3.5 OM Subsystem

The OM subsystem enables the management and maintenance of the BSC6900 in the following

scenarios: routine maintenance, emergency maintenance, upgrade, and capacity expansion.

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3.1 Switching Subsystem

The switching subsystem performs switching of traffic data, signaling, and OM signals.

Position of the Switching Subsystem in the BSC6900 System

The switching subsystem consists of logical modules of two types: MAC switching and TDM

switching. Figure 3-5and Figure 3-6show the position of the switching subsystem in the MPS/

EPS and TCS respectively, with the modules highlighted in apricot.

Figure 3-5Position of the switching subsystem in the BSC6900 system

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Figure 3-6Position of the switching subsystem in the TCS

Functions

l Provides intra-subrack Medium Access Control (MAC) switching

l Provides intra-subrack Time Division Multiplexing (TDM) switching

l Provides inter-subrack MAC switching and TDM switching

l Distributes clock signals and RFN signals to the service processing boards

Hardware Involved

The switching subsystem consists of the SCUa/SCUb boards, TNUa boards, high-speed

backplane channels in each subrack, crossover cables between SCUa/SCUb boards, and inter-

TNUa cables.

Network topologies between subracksThe BSC6900 subracks can be connected in the star, mesh, or chain topology. In Figure 3-7,

(1), (2), and (3) represent the star, mesh, and chain topologies respectively, where the dots

represent subracks.

l 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 is switched by the center node.

l 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.

l Chain topology

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There is a connection between every two adjacent nodes. If an intermediate node is out of

service, the communications between other nodes are affected. The bandwidth utilization

in this topology is high.

Figure 3-7Network topologies between subracks

In the switching subsystem of the BSC6900, the star or chain topology is established among theMAC switching logical modules, and the mesh topology is established among the TDM

switching logical modules.

Inter-Subrack Connection

The MAC switching logical modules switch the ATM/IP traffic data, OM signals, and signaling.

Switching is performed by the SCUa boards and the Ethernet cables between the SCUa boards.

The inter-subrack connections related to MAC switching can be classified into the following

types:

lInterconnections between the MPS and the EPSsThe MPS functions as the main subrack, and a maximum of five EPSsfunction as extension

subracks. The star interconnections between the MPS and the EPSs are established through

the Ethernet cables between the SCUa boards, as shown in Figure 3-8.

l Interconnections between the TCSs

One TCS functions as the main subrack, and a maximum of three TCSs function as

extension subracks. The star interconnections between the TCSs are established through

the Ethernet cables between the SCUa boards, as shown in Figure 3-9.

Figure 3-8Interconnections between subracks through the crossover cables between the SCUa

boards (MPS/EPS)

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Figure 3-9Interconnections between subracks through the crossover cables between the SCUa

boards (TCS)

Switching is performed by the SCUb boards and the Ethernet cables between the SCUb boards.

The inter-subrack connections related to MAC switching can be classified into the following

types:

l Interconnections betweenthe MPS and the EPSs

The MPS functions as the main subrack. Star interconnections are established between the

MPS and the EPSs in the MPR through the Ethernet cables between the SCUb boards.

Chain interconnections are established between the EPSs in the MPR and other EPSs

through the Ethernet cables between the SCUb boards, as shown in Figure 3-10.


Any TCS functions as the main subrack. Star interconnections are established between the

center TCS and the other TCSs in center TCR through the Ethernet cables between the

SCUb boards. Chain interconnections are established between the two TCSs in the center

TCR and other TCSs through the Ethernet cables between the SCUb boards, as shown in

Figure 3-11.

Figure 3-10Interconnections between subracks through the crossover cables between the SCUb

boards (MPS/EPS)

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Figure 3-11Interconnections between subracks through the crossover cables between the SCUb

boards (TCS)

As shown in Figure 3-10and Figure 3-11, subracks 0, 1, and 2 are in the same cabinet and star

interconnections are established between them through the Ethernet cables between the SCUb

boards. Chain interconnections are established between subracks 2 and 3 through the Ethernet

cables between the SCUb boards. Data is exchanged between subrack 0 and subrack 3 through

subrack 2.

The TDM switching logical modules switch the TDM-based traffic data. Switching is performed

by the TNUa boards and the inter-TNUa cables. The inter-subrack connections related to TDM

switching can be classified into the following types:

l Interconnections between the MPS and the EPSs

The mesh interconnections between the MPS and the EPSs are established through theinter-TNUa cables, as shown in Figure 3-12.


The mesh interconnections between the TCSs are established through the inter-TNUa

cables, as shown in Figure 3-13.

Figure 3-12Interconnections between subracks through the inter-TNUa cables (MPS/EPS)

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Figure 3-13Interconnections between subracks through the inter-TNUa cables (TCS)

3.2 Service Processing Subsystem

The BSC6900 service processing subsystem performs the control functions defined in the 3GPP

protocols and processes services of the BSC6900.

Position of the Service Processing Subsystem in the BSC6900 System

The service processing subsystem mainly consists of four logical modules: RNC control plane

(CP), RNC user plane (UP), BSC CP, and BSC UP. Figure 3-14shows the position of the service

processing subsystem in the BSC6900 system, with the modules highlighted in apricot.

NOTE

For details about the definitions of CP and UP, see 5 Signal Flow.

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Figure 3-14Service processing subsystem

Functions

The service processing subsystem performs the following functions:

l User data transfer

l System admission control

l Radio channel ciphering and deciphering

l Data integrity protection

l Mobility management

l Radio resource management and control

l Cell broadcast service control

l System information and user message tracing

l Data volume reporting

l Radio access management

l CS service processing

l PS service processing

Service processing subsystems communicate with each other through the switching subsystem

to form a resource pool and perform tasks cooperatively. They can be increased as required,

according to the linear superposition principle, thereby improving the service processing

capability of the BSC6900.

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Hardware Involved

The service processing subsystem consists of the SPUa, SPUb, XPUa, XPUb, DPUb, DPUc,

DPUd, DPUe, DPUf and DPUg boards. The SPUa, SPUb, XPUa, and XPUb boards process

signaling. The DPUb, DPUc, DPUd, DPUe, DPUf and DPUg boards process services.

3.3 Interface Processing Subsystem

The interface processing subsystem provides transmission ports and resources, processes

transport network messages, and enables interaction between the BSC6900 internal data and

external data.

Position of the Interface Processing Subsystem in the BSC6900 System

The interface processing subsystem consists of three types of interfaces: ATM interfaces, IP

interfaces, and TDM interfaces. Figure 3-15and Figure 3-16show the position of the interface

processing subsystem in the MPS/EPS and TCS respectively, with the interfaces highlighted in

apricot.

Figure 3-15Position of the interface processing subsystem in the MPS/EPS

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Figure 3-16Position of the interface processing subsystem in the TCS

Functions

l The interface processing subsystem provides the following types of ATM, IP, and TDM

interfaces. E1/T1 electrical ports

Channelized STM-1/OC-3 optical ports

Unchannelized STM-1/OC-3 optical ports

FE/GE electrical ports

GE optical ports

l The interface processing subsystem processes transport network messages and, also hides

differences between them within the BSC6900.

l On the uplink, the interface processing subsystem terminates transport network messages

at the interface boards. It also transmits the user plane, control plane, and management

plane datagrams to the corresponding service processing boards. The processing of the

signal flow on the downlink is the reverse of the processing of the signal flow on the uplink.

Hardware Involved

The interface processing subsystem consists of the Iu, Iur, Iub, Abis, A, Ater, Gb, and Pb

interface boards.

3.4 Clock Synchronization Subsystem

The clock synchronization subsystem provides clock signals for the BSC6900, generates theRNC Frame Number (RFN), and provides reference clock signals for base stations.

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Position of the Clock Synchronization Subsystem in the BSC6900 System

Figure 3-17shows the position of the clock synchronization subsystem in the BSC6900 system,

with the clock module highlighted in apricot.

Figure 3-17Position of the clock synchronization subsystem in the BSC6900 system

Functions

The clock synchronization subsystem provides the following clock sources for the BSC6900

and ensures the reliability of the clock signals:

l Building Integrated Timing Supply System (BITS) clock

l Global Positioning System (GPS) clock

l External 8 kHz clock

l

LINE clockThe BSC6900 provides reference clock sources for base stations. Clock signals are transmitted

from the BSC6900 to base stations over the Abis/Iub interface.

Hardware Involved

The clock synchronization subsystem consists of the GCUa/GCGa board.

3.5 OM Subsystem

The OM subsystem enables the management and maintenance of the BSC6900 in the followingscenarios: routine maintenance, emergency maintenance, upgrade, and capacity expansion.

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Position of the OM Subsystem in the BSC6900 System

Figure 3-18shows the position of the OM subsystem in the BSC6900 system, with the OM

module highlighted in apricot.

Figure 3-18Position of the OM subsystem in the BSC6900 system

Functions

The OM subsystem provides:

l 4.4.4 Data Configuration Management

l 4.4.5 Security Management

l 4.4.6 Performance Management

l 4.4.7 Alarm Management

l 4.4.8 Loading Managementl 4.4.9 Upgrade Management

l 4.4.10 BTS Loading Management

l 4.4.11 BTS Upgrade Management

Hardware Involved

The OM subsystem consists of the OMUa board, OMUb board, OMUc board, or GBAM.

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4Working PrinciplesAbout This Chapter

This chapter describes the working principles of the BSC6900 in the following ways: power

supply, environment monitoring, clock synchronization, and OM.

4.1 Power Supply Principle

The power supply subsystem of the BSC6900 adopts the dual-circuit design and point-by-point

monitoring solution. It consists of the power input part and the power distribution part.

4.2 Environment Monitoring Principle

The environment monitoring subsystem of the BSC6900 comprises the power distribution box

and the environment monitoring parts in each subrack. This subsystem monitors and controls

the power supply, fans, and operating environment.

4.3 Clock Synchronization Principle

The clock synchronization subsystem of the BSC6900 consists of the GCUa/GCGa board and

the clock processing units of each subrack. It provides clock signals for the BSC6900 and

reference clocks for base stations.

4.4 OM Principle

OM is performed in the following scenarios: routine maintenance, emergency maintenance,

troubleshooting, device upgrade, and capacity expansion. In addition, OM can be performed to

rapidly adjust device status.

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4.1 Power Supply Principle

The power supply subsystem of the BSC6900 adopts the dual-circuit design and point-by-point

monitoring solution. It consists of the power input part and the power distribution part.

The power supply subsystem of the BSC6900 consists of the -48 V DC power system, DC power

distribution frame (PDF), and DC power distribution box (PDB) at the top of the cabinet.

If a site has heavy traffic or more than two switching systems, two or more independent power

supply systems should be provided. In the case of a communication center, independent power

supply systems should be configured on different floors to supply power to different equipment

rooms.

Power Input Part

The power input part leads the power from the DC PDF to the PDB in the cabinet. It consists ofthe DC PDF, PDB, and cables between them.

Figure 4-1shows the power input part of the BSC6900.

Figure 4-1Power input part of the BSC6900

NOTE

The DC PDF and the DC power distribution panel are not regarded as the components of the BSC6900.

The workingprinciple ofthe power input part is as follows:

l The DC PDF provides each cabinet with dual two-route -48 V DC inputs and one route for

PGND connection.

l Typically, the two power inputs work concurrently. If one power input is faulty, the other

power input continues to supply power to the system to ensure stable operation. You can

rectify the faulty power input without interrupting the services, thereby ensuring the

optimum reliability and availability of the power supply subsystem.

Power Distribution Part

The power distribution part distributes power from the PDB to various components in the cabinet.It comprises the PDB, power distribution switches, and various components in the cabinet.


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The working principle of the power distribution part is as follows:

l The PDB performs lightning protection and overcurrent protection on the dual two-route

-48 V DC inputs. Then, it supplies power to all the components in the cabinet.

l The PDB monitors each input in real time. After the PDB detects abnormal power supply,

it reports the relevant alarms to the OMU. The OMU, then, forwards the alarms to the LMT

or M2000.

l The power distribution varies according to the type of cabinet. For details, see Connections

of Power Cables and PGND Cables in the Cabinet.

4.2 Environment Monitoring PrincipleThe environment monitoring subsystem of the BSC6900 comprises the power distribution box

and the environment monitoring parts in each subrack. This subsystem monitors and controls

the power supply, fans, and operating environment.

NOTE

The physical entity of the OMU can be the OMUa board, OMUb board, or GBAM. The following takes the

OMUa board as an example to describe environment monitoring.

Power Monitoring

Power monitoring involves monitoring the power subsystem in real time, reporting the operating

status of the power supply, and generating alarms when faults occur.

Figure 4-2shows the working principle of power monitoring.

Figure 4-2Working principle of power monitoring

The power monitoring process is as follows:

1. The PAMU in the power distribution box monitors the operating status of the power

distribution box and sends the monitoring signals to the signal transfer board through the

serial port.

2. The signal transfer board transmits the power monitoring signals to the independent fansubrack at the bottom of the cabinet through the monitoring signal cable of the power

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distribution box. Then, the fan subrack forwards the power monitoring signals to the active

SCUa board in the power monitoring subrack.

3. The SCUa board processes the monitoring signals. If faults occur, the SCUa board generates

alarms and reports the alarms to the OMUa board. The OMUa board then forwards the

alarms to the LMT or M2000.

Fan Monitoring

Fan monitoring involves monitoring the operating status of the fans in real time and adjusting

the speed of the fans based on the temperature in the subrack.

Each subrack is configured with a built-in fan box. The temperature sensor next to the air outlet

can detect the temperature in the subrack.

Besides the built-in fan box in the subrack, there is an independent fan subrack at the bottom of

the cabinet. This improves the heat dissipation capability of the cabinet.

Figure 4-3shows the working principle of fan monitoring.

Figure 4-3Working principle of fan monitoring

The fan monitoring process is as follows:

1. The built-in fan box in the subrack and the fan monitoring unit PFCU in the independentfan subrack monitor the operating status of the fans in real time and reports the monitoring

signals to the signaltransfer board through the serial port.

2. The signal transfer board transmits the monitoring signals to the active SCUa board.

l In the case of built-in fan box in the subrack, the signal transfer board transmits the

monitoring signals to the active SCUa board through the backplane of the subrack.

l In the case of independent fan subrack, the signal transfer board transmits the monitoring

signals to the active SCUa board in the fan monitoring subrack through the monitoring

signal cable.

3. The SCUa board processes the monitoring signals. If faults occur, the SCUa board generates

alarms and reports them to the OMUa board. The OMUa board then forwards the alarmsto the LMT or M2000.


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Environment Monitoring

Environment monitoring involves monitoring the temperature, humidity, operating voltage, door

status, water damage, smoke, and infrared. The environment monitoring function is performed

by the Environment Monitor Units (EMUs).

Figure 4-4shows the working principle of environment monitoring.

Figure 4-4Working principle of environment monitoring

If the power distribution box can transfer signals, the environment monitoring process is as

follows:

1. The sensors monitor the environment in real time and send the monitoring signals to the

EMU.

2. The EMU sends the monitoring signals to the power distribution box through the serial

cable.

3. The signal transfer board in the power distribution box transmits the monitoring signals to

the active SCUa board in the power monitoring subrack through the monitoring signal cableof the power distribution box.

4. The active SCUa board in the power monitoring subrack transmits the monitoring signals

to the SCUa board in the MPS through the Ethernet cables between the SCUa boards.

5. The SCUa board in the MPS processes the monitoring signals. If faults occur, the SCUa

board generates alarms and reports the alarms to the OMUa board. The OMUa board then

forwards the alarms to the LMT or M2000.

If the power distribution box cannot transfer signals, the environment monitoring process is as

follows:

1. The sensors monitor the environment in real time and send the monitoring signals to the

EMU.

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2. The EMU sends the monitoring signals to the active SCUa board in the lowest subrack

through the serial cable.

3. The active SCUa board in the lowest subrack transmits the monitoring signals to the SCUa

board in the MPS through the Ethernet cables between the SCUa boards.

4. The SCUa board in the MPS processes the monitoring signals. If faults occur, the SCUaboard generates alarms and reports the alarms to the OMUa board. The OMUa board then

forwards the alarms to the LMT or M2000.

4.3 Clock Synchronization Principle

The clock synchronization subsystem of the BSC6900 consists of the GCUa/GCGa board and

the clock processing units of each subrack. It provides clock signals for the BSC6900 and

reference clocks for base stations.

4.3.1 Clock SourcesThe BSC6900 can use the following clock sources: Building Integrated Timing Supply System

(BITS) clock, external 8 kHz clock, LINE clock, and Global Positioning System (GPS) clock.

4.3.2 Structure of the clock synchronization subsystem

The clock synchronization subsystem consists of the clock board, backplanes, clock cables

between subracks, and clock module in each board.

4.3.3 Clock Synchronization Process

The BSC6900 processes external clock signals before sending them to its boards. The clock

synchronization process varies slightly from one subrack to another.

4.3.4 RFN Generation and Reception

RNC Frame Number (RFN) is used to synchronize NodeBs with the BSC6900. The nodesynchronization frames from the BSC6900 to the NodeBs carry the RFN information.

4.3.1 Clock Sources

The BSC6900 can use the following clock sources: Building Integrated Timing Supply System

(BITS) clock, external 8 kHz clock, LINE clock, and Global Positioning System (GPS) clock.

External Clocks

The external clocks of the BSC6900 are of two types:

l BITS Clock

The BITS clock signals are of three types: 2 MHz, 2 Mbit/s, and 1.5 Mbit/s. The 2 MHz

and 2Mbit/s clock signals are E1 clock signals, and the 1.5 Mbit/s clock signals are T1

clock signals.

The BITS clock has two input modes: BITS0 and BITS1. BITS0 and BITS1 correspond

to the CLKIN0 and CLKIN1 ports on the GCUa/GCGa board respectively. The

BSC6900 obtains the BITS clock signals through the CLKIN0 or CLKIN1 port.

l External 8 kHz Clock

Through the COM1 port on the GCUa/GCGa board, the BSC6900 obtains 8 kHz standard

clock signals from an external device.


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LINE Clock

The LINE clock is an 8 kHz clock that is transmitted from an interface board in the MPS to the

GCUa/GCGa board through the backplane channel. The LINE clock has two input modes:

LINE0 and LINE1.

NOTE

LINE0 and LINE1 correspond to backplane channel 1 and backplane channel 2 respectively.

GPS Clock

The GPS clock provides 1 Pulse Per Second (PPS) clock signals. The BSC6900 obtains the GPS

clock signals from the GPS system. The GCGa board is configured with a GPS card, and the

BSC6900 receives the GPS signals at the ANT port on the GCGa board.

NOTE

The GCUa board is not configured with a GPS card. Therefore, when the BSC6900 is configured with the GCUaboard instead of the GCGa board, the GPS clock is unavailable to the BSC6900.

Local Oscillator

If the BSC6900 fails to obtain any external clock, the BSC6900 can obtain its working clock

signals from the local oscillator.

4.3.2 Structure of the clock synchronization subsystem

The clock synchronization subsystem consists of the clock board, backplanes, clock cables

between subracks, and clock module in each board.

NOTE

Select a board according to the board function. For more information, see Boards. All the boards listed in

this chapter are used as examples for your reference.

Figure 4-5shows the structure of the clock synchronization subsystem.

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Figure 4-5Structure of the clock synchronization subsystem

The structure of the BSC6900 clock synchronization subsystem is described as follows:

l The clock board of the BSC6900 can be the GCUa or GCGa board. The BSC6900 cannot

be configured with both the GCUa and GCGa boards simultaneously. Depending on the

clock type, it can have either the GCUa board or the GCGa board.

l If the MPS extracts the clock signals, the clock signals enter the MPS in any of the following

ways:

The clock signals enter the port on the panel of the GCUa/GCGa board.

The clock signals enter the port on the panel of an interface board that can extract line

clock signals, include AEUa/AOUa/EIUa/OIUa/PEUa/POUa/UOIa board. The clock

signals are then switched to the GCUa/GCGa board through the backplane.

The GCUa/GCGa board generates oscillator clock signals.

l If the EPS extracts the clock signals, the interface board that extracts clock signals must be

the AEUa/AOUa/EIUa/OIUa/PEUa/POUa/UOIa board.

l If the BSC6900 is configured with the Gb interface board, the Gb interface board extracts

clock signals either from the backplane or from the CN. The Gb interface board, however,

cannot extract clock signals from them simultaneously. If the PS services and CS services

use different clock sources and the clock signals are extracted from the CN, the Gb interface

board serves only the Gb interface.


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Figure 4-6shows the connections of the clock cables between the clock boards in the MPS and

the SCUa boards in the EPS when the BSC6900 is configured with active and standby clock

boards and SCUa boards.

Figure 4-6Structure of the clock synchronization subsystem

The active and standby clock boards in the MPS are connected to the active and standby SCUaboards in the EPS through the Y-shaped clock signal cables. This connection mode ensures that

the system clock of the BSC6900 works properly in the case of a single-point failure of the clock

board, Y-shaped clock signal cable, or SCUa board. In addition, the Y-shaped clock signal cable

ensures the proper working of the SCUa boards during the switchover of the active and standby

clock boards.

NOTE

In the MPS, the clock board sends clock signals to the SCUa board in the same subrack through the backplane

channel. Therefore, a Y-shaped clock signal cable is not required.

4.3.3 Clock Synchronization ProcessThe BSC6900 processes external clock signals before sending them to its boards. The clock

synchronization process varies slightly from one subrack to another.

NOTE



Process of Clock Synchronization in the MPS/EPS

The clock signals of the MPS/EPS are provided by the clock board. The clock board can extract

clock signals from an external device or extract LINE clock signals from the A interface. TheGCGa board can extract clock signals from the GPS.

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l Figure 4-7shows the process of clock synchronization in the MPS/EPS when the clock

board extracts clock signals from an external device or from the GPS.

l Figure 4-8shows the process of clock synchronization in the MPS/EPS when the clock

board extracts LINE clock signals from the Iu-CS/A interface.

Figure 4-7Process of clock synchronization in the MPS/EPS (1)

Figure 4-8Process of clock synchronization in the MPS/EPS (2)

As shown in Figure 4-7and Figure 4-8, the process of clock synchronization in the MPS/EPS

is as follows:

1. If an external clock is used, external clock signals travel to the clock board through the port

on the panel of the clock board. If the GPS clock is used, clock signals travel to the clock

board through the GPS antenna port. If the LINE clock is used, clock signals travel to the

clock board through the backplane.


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2. The clock source is phase-locked in the clock board to generate clock signals. The clock

signals, then, are sent to the SCUa board in the MPS through the backplane and to the SCUa

board in each EPS through the clock signal output ports.

3. The SCUa board in the MPS/EPS transmits the clock signals to the other boards in the same

subrack through the backplane.

NOTE

The Iub/Abis interface boards transmit the clock signals to the base stations.

Process of Clock Synchronization in the TCS

Figure 4-9shows the process of clock synchronization in the TCS when the TCS extracts LINE

clock signals from the A interface.

Figure 4-9Process of clock synchronization in the TCS

1. The TCS extracts LINE clock signals from the A interface. Then, the LINE clock signals

are processed by the A interface board to obtain the required clock signals.

2. In the TCS, the A interface board transmits the clock signals to the SCUa board through

the backplane. Then, the SCUa board transmits the clock signals to the other boards in the

TCS.

NOTE

l In A over IP over Ethernet mode, the BSC6900 can extract only external clock signals.

lIn A over IP over E1/T1 mode, the BSC6900 can extract only LINE clock signals.

4.3.4 RFN Generation and Reception

RNC Frame Number (RFN) is used to synchronize NodeBs with the BSC6900. The node

synchronization frames from the BSC6900 to the NodeBs carry the RFN information.

NOTE



Figure 4-10shows the process of RFN generation and reception. This figure takes the GCUa

board as an example.

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Figure 4-10Process of RFN generation and reception

The GCUa/GCGa board in the MPS sends the 1 PPS signals and synchronization time packets

to the SCUa board in each subrack. The SCUa board in each subrack then sends the 1 PPS signals

and synchronization time packets to the other boards in the same subrack. The boards generate

the required RFN signals according to the received 1 PPS signals and synchronization time

packets.

NOTE

l The 1 PPS signals can be generated by the GCUa/GCGa board.

l When the BSC6900 is configured with the GCGa board, it can obtain the GPS synchronization signals

through the GPS card to generate the 1 PPS signals that are synchronized with the satellite signals.

4.4 OM Principle

OM is performed in the following scenarios: routine maintenance, emergency maintenance,

troubleshooting, device upgrade, and capacity expansion. In addition, OM can be performed to

rapidly adjust device status.


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4.4.1 Dual OM Plane

The BSC6900 has a dual OM plane to prevent single-point failure from affecting the normal

operation and maintenance.

4.4.2 OM Network

The OM network of the BSC6900 consists of the M2000, LMT, OMU, SCUa/SCUb boards,and OM modules in other boards.

4.4.3 Active/Standby Workspaces

This section describes the active/standby workspaces of the OMU and those of the host boards.

4.4.4 Data Configuration Management

The data configuration management involves managing the data configuration process of the

BSC6900 so that configuration data is properly sent to the related boards in a secure manner.

4.4.5 Security Management

The security management ensures the security of user login and helps to identify equipment

faults. It involves rights management, log management, and inventory management.

4.4.6 Performance Management

The BSC6900 performance management involves collecting, analyzing, and querying

performance data.

4.4.7 Alarm Management

The alarm management helps to monitor the running status of the BSC6900 and informs you of

faults in real time so that you can take proper measures in time.

4.4.8 Loading Management

The BSC6900 loading management involves managing the process of loading program and data

files onto boards after the boards (or subracks) are started or restarted.

4.4.9 Upgrade ManagementThe upgrade management involves managing the procedures for upgrading the OMU software

and patch.

4.4.10 BTS Loading Management

The BTS loading management involves managing the process of loading software to the boards

in the BTS.

4.4.11 BTS Upgrade Management

The BTS upgrade management refers to upgrading the BTS to a later version. You can locally

or remotely upgrade multiple BTSs through the OM network.

4.4.1 Dual OM PlaneThe BSC6900 has a dual OM plane to prevent single-point failure from affecting the normal

operation and maintenance.

NOTE



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