BSC6900 GSM Technical Description(V900R011C00_09)

7/24/2019 BSC6900 GSM Technical Description(V900R011C00_09)

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BSC6900 GSM

V900R011C00

Technical Description

Issue 09

Date 2011-12-30

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 09 (2011-12-30) Huawei Proprietary and Confidential

Copyright Huawei Technologies Co., Ltd.

i
http://www.huawei.com/


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About This Document

PurposeThis document describes the structures, 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 VersionThe following table lists the product version related to the document.

Product Name Product Version

BSC6900 V900R011C00

Intended AudienceThis document is intended for:

l Network planners

l System engineers

l Field engineers

Organization1 Changes in the BSC6900 GSM Technical Description

This chapter describes the changes in the BSC6900 GSM Technical Description between

different versions.

2 Hardware Configuration Modes

The BSC6900 supports flexible hardware configuration modes. The hardware configuration

mode 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, and on the Pb 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.....................................................................................................................ii

1 Changes in the BSC6900 GSM Technical Description...........................................................1

2 Hardware Configuration Modes................................................................................................5

3 Overall Structure...........................................................................................................................7

3.1 Switching Subsystem........................................................................................................................................11

3.2 Service Processing Subsystem..........................................................................................................................15

3.3 Interface Processing Subsystem.......................................................................................................................16

3.4 Clock Synchronization Subsystem...................................................................................................................18

3.5 OM Subsystem.................................................................................................................................................19

4 Working Principles.....................................................................................................................21

4.1 Power SupplyPrinciple....................................................................................................................................22

4.2 Environment Monitoring Principle...................................................................................................................234.3 Clock Synchronization Principle......................................................................................................................26

4.3.1 Clock Sources..........................................................................................................................................26

4.3.2 Structure of the Clock Synchronization Subsystem................................................................................27

4.3.3 Clock Synchronization Process...............................................................................................................29

4.4 OM Principle....................................................................................................................................................30

4.4.1 DualOM Plane........................................................................................................................................31

4.4.2 OMNetwork............................................................................................................................................32

4.4.3 Active/Standby Workspaces....................................................................................................................33

4.4.4 DataConfiguration Management............................................................................................................35

4.4.5 Security Management..............................................................................................................................39

4.4.6 Performance Management.......................................................................................................................42

4.4.7 Alarm Management.................................................................................................................................44

4.4.8 Loading Management..............................................................................................................................45

4.4.9 Upgrade Management..............................................................................................................................49

4.4.10 BTS Loading Management....................................................................................................................51

4.4.11 BTS Upgrade Management...................................................................................................................52

5 Signal Flow...................................................................................................................................54

5.1 User-Plane Signal Flow....................................................................................................................................55

5.1.1 GSM CS Signal Flow..............................................................................................................................55

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5.1.2 GSM PS Signal Flow...............................................................................................................................60

5.1.3 CBC Signal Flow.....................................................................................................................................62

5.2 Control-Plane Signal Flow...............................................................................................................................62

5.2.1 Signaling Flow on the A Interface...........................................................................................................63

5.2.2 Signaling Flow on the Abis Interface......................................................................................................65

5.2.3 Signaling Flow on the Gb Interface.........................................................................................................66

5.2.4 Signaling Flow on the Pb Interface.........................................................................................................67

5.3 OM Signal Flow...............................................................................................................................................67

6 Transmission and Networking.................................................................................................71

6.1 Transmission and Networking on the A/Gb Interface......................................................................................72

6.1.1 TDM-Based Networking on the A/Gb Interface.....................................................................................72

6.1.2 IP-Based Networking on the A/Gb Interface...........................................................................................73

6.2 Transmission and Networking on the Abis Interface.......................................................................................74

6.2.1 TDM-Based Networking on the Abis Interface.......................................................................................74

6.2.2 IP-Based Networking on the Abis Interface............................................................................................75

6.3 Transmission and Networking on the Ater Interface........................................................................................76

6.3.1 TDM-Based Networking on the Ater Interface.......................................................................................77

6.3.2 IP-Based Networking on the Ater Interface............................................................................................77

6.4 Transmission and Networking on the Pb Interface..........................................................................................78

7 Parts Reliability...........................................................................................................................79

7.1 Concepts Related to Parts Reliability...............................................................................................................80

7.1.1 Backup.....................................................................................................................................................80

7.1.2 Resource Pool..........................................................................................................................................81

7.1.3 Port Trunking...........................................................................................................................................81

7.1.4 Port Load Sharing....................................................................................................................................81

7.2 Board Redundancy...........................................................................................................................................82

7.2.1 Backup of EIUa Boards...........................................................................................................................82

7.2.2 Backup of OIUa Boards..........................................................................................................................82

7.2.3 Backup of PEUa Boards..........................................................................................................................83

7.2.4 Backup of SCUa Boards..........................................................................................................................84

7.2.5 Backup of TNUa Boards.........................................................................................................................84

7.2.6 Backup of FG2a/FG2c Boards................................................................................................................857.2.7 Backup of GCUa/GCGa Boards..............................................................................................................86

7.2.8 Backup of GOUa/GOUc/GOUd Boards..................................................................................................87

7.2.9 Backup of OMUa/OMUb Boards............................................................................................................88

7.2.10 Backupof POUc Boards........................................................................................................................89

7.2.11 Backupof XPUa/XPUb Boards............................................................................................................89

7.2.12 Resource Pool of DPUa/DPUc/DPUd Boards.......................................................................................90

7.3 Port Redundancy...............................................................................................................................................91

7.3.1 Optical Port Backup.................................................................................................................................91

7.3.2 FE/GE Port Backup.................................................................................................................................91

7.3.3 Port Load Sharing....................................................................................................................................92

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7.3.4 Port Trunking...........................................................................................................................................93

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1Changes in the BSC6900 GSM TechnicalDescription

This chapter describes the changes in the BSC6900 GSM Technical Description between

different versions.

09 (2011-12-30)

This is the ninth commercial release.

Compared with issue 08 (2011-07-25) of V900R011C00, this issue does not include any new

topics.

Compared with issue 08 (2011-07-25) of V900R011C00, this issue incorporates the following

changes:

Topic Change Description

5.1.1 GSM CS Signal Flow Updated the schematic diagram for signal

flow in the TCS in BM/TC separated mode

when the Abis and A interfaces use TDM

transmission mode and the Ater interface uses

the IP transmission mode.

4.1 Power Supply Principle Modified the description and schematic

diagram for power introduction.

Chapters describing counters for all boards Updated the size and weight specificationsfor all boards.

Compared with issue 08 (2011-07-25) of V900R011C00, this issue does not exclude any topics.

08 (2011-07-25)

This is the eighth commercial release.

Compared with issue 07 (2011-05-25) of V900R011C00, this issue does not include any newtopics.

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changes:


5.1.1 GSM CS Signal Flow Changed the TNUa to the SCUa in the TCsubrack in the following conditions: The BM/

TC separated mode is used, the Abis and A

interfaces use the TDM transmission mode,

and the Abis interface uses the IP

transmission mode.

Added the functions provided by the DPUc.

Changed PTRAU frames to TRAU frames in

the following conditions: The Abis interface

uses the TDM transmission mode, and the A

interface uses the IP transmission mode.

Changed the terms "MSC" and "MGW" to"MSS".

4.3.2 Structure of the Clock

Synchronization Subsystem

Changed the types of interface boards.


07 (2011-05-25)

This is the seventh commercial release.


topics.


changes:




Supplemented the interface board capable of

extracting line clock.

4.4.6 Performance Management Modified the performance measurement datathat can be reserved on the OMU during

performance management.


06 (2011-01-30)

This is the sixth commercial release.


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changes:


3 Overall Structure Modified the number of EPSs that can beconfigured.


05 (2010-09-15)

This is the fifth commercial release.



changes:


7.2.12 Resource Pool of DPUa/DPUc/

DPUd Boards

Added the description of the resource pool.


04 (2010-05-31)

This is the fourth commercial release.

Compared with issue 03 (2009-12-05) of V900R011C00, this issue includes the following new

topics:

l 7 Parts Reliability


changes:


4.4.5 Security Management Added the description of the Password

setting.

3 Overall Structure Added the description of the SAU board

configuration.


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03 (2009-12-05)

This is the third commercial release.


topics.


changes:




Modified the description of the BSC6900

clock synchronization subsystem structure.

Active/Standby Workspaces of the OMU Deleted the description of Relationship

Between the Active/Standby Workspaces

of Host Boards and the Active/Standby

Workspaces of the OMUbecause it isdescribed in Active/Standby Workspaces of

Host Boards.

5.1.1 GSM CS Signal Flow Added the description of the signal flow in

Ater over IP mode.


02 (2009-10-30)

This is the second commercial release.


topics.


changes:


3 Overall Structure Added the description of the BSC6900

software structure.


01 (2009-07-30)

This is the firstcommercial release.

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2Hardware Configuration ModesThe BSC6900 supports flexible hardware configuration modes. The hardware configuration

mode varies according to the scenario.

Learn the following concepts for a better understanding of the BSC6900.

BM/TC

The main processing subrack (MPS) and extended processing subrack (EPS) are collectively

known as basic module (BM) subrack. The transcoder subrack (TCS) is known as TC subrack.

Main TCS

The TCS that forwards the OM signals to other TCSs is called the main TCS. All other TCSsare called extension TCSs.

The main TCS is determined by both the cable connections and the data configuration. For details

of the cable connections, see switching subsystem.

Subrack Configuration Modes

The BSC6900 subracks can be configured in three modes:

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 than in BM/

TC separated mode, When the capacity is the same, the BSC6900 in this mode has fewer

cabinets and subracks.

l A over IP

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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 not

with the TCS. The TC function is performed by the Media Gateway (MGW).

Characteristics: In this mode, the BSC6900 has fewer cabinets and subracks. The

BSC6900 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 three 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, 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

The TCS that forwards the OM signals to other TCSs is called the main TCS.

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The channel for the TCS and the MPS to exchange information varies according to the location

of the TCS: local or remote.

l In local TCS mode, the SCUa board in the main TCS is connected to the SCUa board in

the MPS through the crossover cable.

l In remote TCS mode, the TCS is located in the TCR, which is separate from the cabinet

that houses the MPS/EPS. The main TCS and the MPS are connected through the cable

between the Ater interface boards.

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 3GPPprotocols 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 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 followingscenarios: 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 MPS/EPS

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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 to the service processing boards

Hardware Involved

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.

Network Topologies Between SubracksThe BSC6900 subracks can be connected in the star or mesh topology. In Figure 3-7, (1) and

(2) represent the star and mesh 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 must be 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.

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Figure 3-7Network topologies between subracks

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.

Inter-Subrack Connection

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

The 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:

l Interconnections between the MPS and the EPSs

The MPS functions as the main subrack, and a maximum of three EPSs function 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)

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

inter-TNUa cables, as shown in Figure 3-10.

l Interconnections between the TCSs

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

cables, as shown in Figure 3-11.

Figure 3-10Interconnections betweensubracks through the inter-TNUa cables (MPS/EPS)

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Figure 3-11Interconnections 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 two logical modules: BSC control plane

(CP) and BSC user plane (UP). Figure 3-12shows 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.

Figure 3-12Service processing subsystem

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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.

Hardware Involved

The service processing subsystem consists of the XPUa, XPUb, DPUc, and DPUd boards. The

XPUa and XPUb boards process signaling. The DPUc and DPUd 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 two types of interfaces: IP interfaces and TDM

interfaces. Figure 3-13and Figure 3-14show the position of the interface processing subsystem

in the BSC6900 system, with the interfaces highlighted in apricot.

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Figure 3-13Position of the interface processing subsystem in the MPS/EPS

Figure 3-14Position of the interface processing subsystem in the TCS

Functions

l The interface processing subsystem provides the following types of IP and TDM interfaces.

E1/T1 electrical ports

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STM-1 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 Abis, A, Ater, Gb, and Pb interface boards.

3.4 Clock Synchronization SubsystemThe clock synchronization subsystem provides clock signals for the BSC6900 and provides

reference clock signals for base stations.

Position of the Clock Synchronization Subsystem in the BSC6900 System

Figure 3-15shows the position of the clock synchronization subsystem in the BSC6900 system,

with the clock module highlighted in apricot.

Figure 3-15Position of the clock synchronization subsystem in the BSC6900 system

Functions

The clock synchronization subsystem provides the following clock sources for the BSC6900and ensures the reliability of the clock signals:

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l Building Integrated Timing Supply System (BITS) clock

l Global Positioning System (GPS) clock

l External 8 kHz clock

l LINE clock

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

from the BSC6900to base stations over the Abis 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 following

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

Position of the OM Subsystem in the BSC6900 System

Figure 3-16shows the position of the OM subsystem in the BSC6900 system, with the OM

module highlighted in apricot.

Figure 3-16Position 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

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l 4.4.6 Performance Management

l 4.4.7 Alarm Management

l 4.4.8 Loading Management

l 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, or GBAM.

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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 distribution panel is not regarded as the components of the BSC6900.

The working principle of the 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 theoptimum reliability and availability of the power supply subsystem.

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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.

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 operatingstatus 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:

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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 fan

subrack at the bottom of the cabinet through the monitoring signal cable of the powerdistribution 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 independent

fan subrack monitor the operating status of the fans in real time and reports the monitoring

signals to the signal transfer 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 themonitoring signals to the active SCUa board through the backplane of the subrack.

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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.

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 cable

of 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.

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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.

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 SCUa

board 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 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 Sources

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

(BITS) clock, external 8 kHz clock, and LINE 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 2 Mbit/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 board respectively. The BSC6900obtains the BITS clock signals through the CLKIN0 or CLKIN1 port on the GCUa/

GCGa board.

l External 8 kHz Clock

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

signals from an external device.

LINE Clock

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

GCUa board through the backplane channel. The LINE clock has two input modes: LINE0 andLINE1.

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NOTE

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

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.

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

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 is the GCUa 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 board.

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

clock signals, include EIUa/OIUa/PEUa/POUc board. The clock signals are then

switched to the GCUa board through the backplane.

The GCUa board generates oscillator clock signals.

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

the EIUa/OIUa/PEUa 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.

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 SCUa

boards 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.

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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.

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. The

GCGa board can extract clock signals from the GPS.

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 A interface.

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

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

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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 theclock board through the backplane.

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 Abis interface boards transmit the clock signals to the base stations.

Process of Clock Synchronization in the TCSFigure 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 theTCS.

NOTE

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

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

Figure 4-10shows this dual OM plane design.

Figure 4-10Dual OM plane

NOTE

If the internal network and external networkare on different network segments, ensure that the two networks

are isolated.

The physical entity of the OMU can be the OMUa board, OMUb board, or GBAM. Both the OMUa board and

the OMUb board can work in active/standby mode. The following takes the OMUa board as example to describe

the dual OM plane.

The dual OM plane design is implemented by the hardware that works in active/standby mode.

When an active component is faulty but the standby component works properly, a switchover

is automatically performed between the active and standby components, to ensure that the OM

channel works properly.

The active/standby OMUa boards use the same external virtual IP address to communicate with

the LMT or M2000 and use the same internal virtual IP address to communicate with the SCUa

board.

l When the active OMUa board is faulty, an active/standby switchover is performed

automatically, and the standby OMUa board takes over the OM task. In this case, the

internal and external virtual IP addresses remain unchanged. Thus, the propercommunication between the internal and external networks of the BSC6900 is ensured.

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l When a single-point failure occurs on the switching network, the active/standby SCUa

boards in each subrack are switched over automatically to ensure that the OM channel

works properly.

4.4.2 OM NetworkThe OM network of the BSC6900 consists of the M2000, LMT, OMU, SCUa boards, and OM

modules in other boards.

NOTE

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

OMUa board as example to describe environment monitoring.

Figure 4-11shows the structure of the BSC6900 OM network.

Figure 4-11Structure of the OM network

NOTE

Figure 4-11shows some of the boards in the OM network.

The SCUa boards in the EPS/TCS are connected to the SCUa boards in the MPS through crossover cables. Thecrossover cables transmit OM signals from the MPS to the EPS/TCS.

In remote TCS mode, the SCUa boards in the TCS are connected to the SCUa boards in the MPS through the

cables between the Ater interface boards. These cables transmit OM signals from the MPS to the TCS.

M2000

The M2000 is a centralized network management system. The M2000 is connected to the

BSC6900 through Ethernet cables. One M2000 can remotely manage multiple BSC6900s.

LMT

The LMT is connected to the OMUa board of the BSC6900 and works on the Windows XPProfessional or Windows Vista operating system. One or more LMTs can be connected to the

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OMUa board directly or through networks. The maintenance of the BSC6900 can be performed

locally or remotely through the LMT. The LMT is connected to an alarm box through a serial

cable.

OMUa BoardThe OMUa board is the back administration module of the BSC6900. It is connected to an

external device through the Ethernet cable. The BSC6900 can be configured with one OMUa

board in independent mode or with two OMUa boards in active/standby mode.

The OMUa board functions as a bridge between the BSC6900 and the LMT/M2000. The OM

network of the BSC6900 is classified into the following networks:

l Internal network: implements the communication between the OMUa board and the host

boards of the BSC6900.

l External network: implements the communication between the OMUa board and external

devices, such as the LMT or M2000.

SCUa Board

The SCUa board is the switching and control board of the BSC6900. It is responsible for the

OM of the subrack where it is located. If a subrack is configured with two SCUa boards, then

the two boards work in active/standby mode.

The SCUa board performs OM on other boards in the same subrack through the backplane

channels. The SCUa boards in different subracks are connected through crossover cables.

4.4.3 Active/Standby Workspaces

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

Active/Standby Workspaces of the OMU

The active/standby workspaces of the OMU are used for the upgrade and rollback of the

BSC6900 versions, thus enabling quick switching between versions.

Concept of the Active/Standby Workspaces of the OMU

The active/standby workspaces of the OMU refer to the active/standby workspaces for storing

the version files on the OMU. Each workspace is used to store files of different versions.

The relation between the active/standby workspaces is relative. The active/standby relation

depends on the storage location of the running version. The workspace that stores the running

OMU version files is the active workspace, and the other is the standby workspace.

Working Principles of the Active/Standby Workspaces of the OMU

The working principles of the OMU active/standby workspaces in the case of the OMU version

upgrade are as follows:

1. The standby workspace of the active OMU is upgraded to a new version.

2. The standby workspace of the standby OMU is upgraded to a new version.

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3. A switchover is performed between the active and standby workspaces of the active OMU.

The standby workspace that stores the new version of files becomes active, and the other

workspace becomes standby.

4. The active OMU runs the upgraded version.

5. A switchover is performed between the active and standby workspaces of the standby OMUto ensure that the versions of the workspaces are consistent with those of the active OMU.

6. The OMU version upgrade is complete.

After the OMU version upgrade, the standby workspaces of the active and standby OMUs store

the files of the old version. In this case, version rollback can be performed as required.

The working principles of the OMU active/standby workspaces in the case of version rollback

are as follows:

1. A switchover is performed between the active and standby workspaces of the active OMU.

The running version of the active OMU is rolled back to the pre-upgrade version.

2. The active OMU runs the pre-upgrade version.

3. A switchover is performed between the active and standby workspaces of the standby OMU

to ensure that the versions of the workspaces are consistent with those of the active OMU.

4. The OMU version rollback is complete.

Relation Between Intra-OMU Active and Standby Workspaces

The active and standby workspaces of the OMU are independent of each other. The operation

of the active workspace does not change any information in the standby workspace.

Relation Between Inter-OMU Active and Standby Workspaces

The active and standby workspaces of the active OMU correspond to the active and standby

workspaces of the standby OMU respectively. Between the active and standby OMUs, the files

in the active workspaces are automatically synchronized in real time, but those in the standby

workspaces need to be synchronized manually.

Relation Between the Active/Standby Workspaces of Host Boards and the Active/Standby Workspaces of the OMU

On the active workspaces of the host boards, files can be loaded only from the active workspace

of the OMU. On the standby workspaces of the host boards, files can be loaded only from the

standby workspace of the OMU.

Active/Standby Workspaces of Host Boards

BSC6900 host boards refer to all the boards except the OMUa board. The active/standby

workspaces of host boards are used for file loading, version upgrade, and version rollback.

Concept of the Active/Standby Workspaces of Host Boards

The active/standby workspaces of host boards refer to the active/standby workspaces for storing

different versions of programs, data, and patch files in the board flash memory.

The relation between the active/standby workspaces is a relative concept. The active/standby

relation depends on the running version. The workspace that stores the running version files ofa board is the active workspace, and the other is the standby workspace.

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Working Principles of the Active/Standby Workspaces of Host Boards

Before loading programs and data files, host boards choose the loading mode according to the

loading control parameter. For details, see 4.4.8 Loading Management.

Relation Between Intra-Board Active/Standby Workspaces

The active and standby workspaces of a host board are independent of each other. The operation

of the active workspace does not change any information in the standby workspace.

Relation Between Inter-Board Active/Standby Workspaces

The active and standby workspaces of the active board are independent of the active and standby

workspaces of another host board. The operation of the active board does not change any

information in the standby board.

Relation Between the Active/Standby Workspaces of Host Boards and the Active/Standby Workspaces of the OMU

On the active workspaces of the host boards, files can be loaded only from the active workspace

of the OMU. On the standby workspaces of the host boards, files can be loaded only from the

standby workspace of the OMU.

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.

Data Configuration Modes

The BSC6900 supports two data configuration modes: effective mode and ineffective mode.

Effective Mode and ineffective Mode

l Effective mode

If data configuration is performed on the BSC6900 in effective mode, then the relevant

configuration data takes effect on the host boards in real time.l Ineffective mode

If data configuration is performed on the BSC6900 in ineffective mode, then the relevant

configuration data takes effect only after the BSC6900 is reset or is switched to the effective

mode.

Principle of Effective Mode Configuration

Effective mode configuration is applied to dynamic modification of the BSC6900 configuration

data.

Figure 4-12shows the principle of effective mode configuration.

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Figure 4-12Principle of effective mode configuration

The process of effective mode configuration is as follows:

1. The BSC6900 is switched to effective mode.

2. The configuration console (LMT or M2000) sends MML commands to the configuration

management module of the OMU.

3. The configuration management module of the OMU sends the configuration data to the

database of the related host board and writes the data to the OMU database.

Principle of Ineffective Mode Configuration

Ineffective mode configuration is applied to BSC6900 initial configuration.

Figure 4-13shows the principle of ineffective mode configuration.

Figure 4-13Principle of ineffective mode configuration

The process of ineffective mode configuration is as follows:

1. The BSC6900 is switched to ineffective mode.

2. The configuration console (LMT or M2000) sends MML commands to the configuration

management module of the OMU.

3. The configuration management module sends only the configuration data to the OMU

database.

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4. When a subrack or the BSC6900 is reset, the OMU formats the configuration data in the

database into a .dat file, loads the file onto the related host boards, and then activates the

configuration data.

Data Configuration Rollback

Data configuration rollback is performed to recover configurations when errors occur. If the

modified data configuration fails to reach the expected result or even causes equipment or

network failure, you can perform rollback to recover the configurations and to ensure the proper

operation of the BSC6900.

WARNING

Data configuration rollback cannot be performed when the CM control enable switch is set to

ON, when the fast configuration mode is selected, or when batch configuration is performed.

Data configuration rollback consists of the following types of operation:

l Undoing a single configuration command

After you undo the latest ten commands one by one, the system rolls back to the

configuration before each command is executed.

l Redoing a single configuration command

After you redo the latest ten commands one by one, the system rolls back to the

configuration after each command is executed.

l Undoing configuration commands in batches

This operation is performed to undo all the configuration commands that were executed

after a specified rollback savepoint. After this operation, the system rolls back to the

configuration at the specified rollback savepoint.

l Redoing configuration commands in batches

This operation is performed to redo the configurations that were rolled back in batches.

After this operation, the system returns to the configuration at the specified rollback

savepoint or the configuration after the commands were executed.

Data Configuration Rights ManagementThe data configuration rights management controls the data configuration rights and the number

of users that simultaneously perform data configuration on the BSC6900 through the LMT or

M2000. This ensures the security of data configuration.

The principles of data configuration rights management are as follows:

l The data configuration rights management enables only one user to perform data

configuration on the BSC6900 through the LMT or M2000 at a time.

l The user must have data configuration rights.

With the data configuration rights management, users cannot configure data for the BSC6900at the same time.

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Data Configuration Check

The data configuration check involves the data validity check and data consistency check. This

ensures the normal operation of the BSC6900.

Data Validity Check

The data validity check involves checking whether a configuration complies with the

configuration rules and whether an MML script file complies with the syntactic rules. When a

configuration is performed or an MML command is executed, the data validity check is

performed. If there is an error in the configuration, the BSC6900 stops the configuration or the

running of the command. At the same time, a warning message is displayed.

Data Consistency Check

The data consistency check consists of two parts:

l Check of the data consistency between the active and standby OMUs

If the BSC6900 is configured with the active and standby OMUs, the data on the active

OMU must be the same as that on the standby OMU, thus ensuring the reliability of the

BSC6900. If the active OMU is faulty, the standby OMU takes over the tasks after an active/

standby switchover.

l Check of the data consistency between the OMU and the host boards

The data on the host boards must be the same as that on the OMU. Otherwise, the system

cannot run stably. In addition, some data modified by users cannot take effect. Figure

4-14shows the procedure for the data consistency check.

Figure 4-14Check of the data consistency between the OMU and the host boards

The procedure for checking the data consistency between the OMU and the host boards is as

follows:

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1. On the LMT, a data consistency check command is sent to the OMU automatically on a

regular basis or manually.

2. The OMU analyzes the parameters of the command and checks whether the data in the

board databases is the same as that in the OMU database.

3. The OMU generates a result file and sends it to the LMT.

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.

Rights Management

The rights management is performed to identify a user and define the rights of the user.

The BSC6900 supports multi-user operations. It performs hierarchical rights management forusers to ensure security. The BSC6900 authorizes users at multiple levels and assigns certain

rights to the users at each level. To log in to the LMT of the BSC6900, a user must enter the

registered user name and password, through which the BSC6900 identifies the user.

l User types

Local users: refer to the accounts (including the default local account admin) managed

by only the BSC6900 LMT. This type of LMT users can log in to the LMT during the

BSC6900 installation and during the disconnection from the M2000.

Domain users: refer to the accounts that are created, changed, authenticated, and

authorized on the M2000. Domain users can manage the BSC6900 after logging in to

the LMT or after logging in to the M2000 server through the M2000 client.l User rights

Table 4-1Definitions of the user rights

Class Rights CommandGroup

Description

Guest Guest can only

browse data.

G_0 The objects in this command group are used to

query system information, such as users,

command groups, logs, NTP, EMS, and time

zones.


query data configurations and consist of the

MML commands of the LST type.


query alarm information.


query performance data, for example, a result file

or a task file.

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Description


query device information such as device status

and consist of the MML commands of the DSP

type.


query the information about base stations, for

example, the attributes and boards of base

stations.

User In addition to

the rights

granted to theGuest, User

can perform

system OM.


perform performance management, for example,

to activate a performance task file or to upload aperformance result file.


perform device management, for example, to

reset, block, unblock, or switch over a board.


trace and monitor the signal flow on the control

plane and on the user plane, for example, to query

a tracing task or to create/delete/start a tracing

task.


modify device panels.


perform software management, for example,

patch management.


perform base station management, for example,

to manage base station software or to reset a base

station.

Operator In addition tothe rights

granted to the

User, the

Operator can

perform data

configuration

on the

equipment.

G_3 The objects in this command group are used toconfigure data, for example, the data for a new

cell.


perform alarm management, for example, to

clear an alarm or to set the alarm level.

BSC6900 GSM




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Description

Adminis

trator

Administrator

has the highest

operation

rights. It can

manage all the

other users.


manage system information, for example, to

manage a user, to set the time zone, to set the

dayli

BSC6900 GSM Technical Description(V900R011C00_09)

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