BSC6900 Product Description

SRAN8.0&GBSS15.0&RAN15.0 BSC6900

Product Description

Issue Draft A

Date 2012-05-30

HUAWEI TECHNOLOGIES CO., LTD.

Draft A (2012-05-30) Huawei Proprietary and Confidential

Copyright Huawei Technologies Co., Ltd

i

Copyright Huawei Technologies Co., Ltd. 2012. All rights reserved.

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Huawei Technologies Co., Ltd.

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Product Description About This Document



ii

About This Document

Overview

This document describes the network position, product architecture and characteristics, and

related technical specifications of the BSC6900.

This document helps users learn the basic information about the BSC6900.

Intended Audience

This document is intended for:

Huawei technical support

System engineers

Network planning engineers

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

Symbol Description

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result in serious injury or death.

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avoided, result in moderate or minor injury.

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avoided, result in equipment damage, data loss, performance deterioration, or unanticipated results.

Provides a tip that may help you solve a problem or save time.

Provides additional information to emphasize or supplement important points in the main text.


Product Description About This Document



iii

Change History Changes between document issues are cumulative. The latest document issue contains all the

changes made in earlier issues.

Draft A (2012-05-30)

This is the first commercial release.


Product Description Contents



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Contents

About This Document ............................................................................................................... ii

1 Introduction .............................................................................................................................. 1

1.1 Positioning ................................................................................................................................................ 1

1.2 Benefits ..................................................................................................................................................... 3

2 Architecture ............................................................................................................................... 6

2.1 Overview................................................................................................................................................... 6

2.2 Hardware Architecture ............................................................................................................................... 6

2.2.1 Cabinets ........................................................................................................................................... 6

2.2.2 Subracks ........................................................................................................................................... 7

2.2.3 Boards .............................................................................................................................................. 8

2.3 Software Architecture ...............................................................................................................................12

2.4 Reliability.................................................................................................................................................14

2.4.1 System Reliability............................................................................................................................14

2.4.2 Hardware Reliability ........................................................................................................................15

2.4.3 Software Reliability .........................................................................................................................16

3 Configurations ........................................................................................................................ 17

3.1 Overview..................................................................................................................................................17

3.2 Capacity Configuration of the BSC6900 GSM ..........................................................................................18

3.2.1 Hardware Capacity Configuration in BM/TC Combined Mode .........................................................18

3.2.2 Hardware Capacity Configuration in BM/TC Separated Mode ..........................................................18

3.2.3 Hardware Capacity Configuration in A over IP Mode .......................................................................19

3.3 Capacity Configuration of the BSC6900 UMTS ........................................................................................20

3.3.1 Capacity of the BSC6900 UMTS in the Balanced Traffic Model .......................................................21

3.3.2 Capacity of the BSC6900 UMTS in the High-PS Traffic Model ........................................................22

3.3.3 Capacity of the BSC6900 UMTS in the Traffic Model for Smart Phones ...........................................23

3.4 Capacity Configuration of the BSC6900 GU .............................................................................................24

4 Operation and Maintenance ................................................................................................. 26

4.1 Overview..................................................................................................................................................26

4.2 Benefits ....................................................................................................................................................27

5 Technical Specifications ........................................................................................................ 29

5.1 Technical Specifications............................................................................................................................29


Product Description Contents



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5.1.1 Capacity Specifications ....................................................................................................................29

5.1.2 Structural Specifications ..................................................................................................................30

5.1.3 Clock Specifications ........................................................................................................................30

5.1.4 Electrical Specifications ...................................................................................................................31

5.1.5 Space Specifications ........................................................................................................................32

5.1.6 Environmental Specifications ...........................................................................................................32

5.1.7 Transmission Ports ...........................................................................................................................33

5.1.8 Reliability Specifications .................................................................................................................33

5.2 Compliance Standards ..............................................................................................................................33

5.2.1 Power Supply Standard ....................................................................................................................33

5.2.2 Grounding Standard .........................................................................................................................33

5.2.3 Environment Standards ....................................................................................................................34

5.2.4 Safety Standards ..............................................................................................................................34

5.2.5 EMC Standards ................................................................................................................................35

5.2.6 Environment Standards ....................................................................................................................35

A Acronyms and Abbreviations .............................................................................................. 36


Product Description 1 Introduction



1

1 Introduction 1.1 Positioning

This document applies to BSC6900 V900R015.

With the rapid development of mobile communications technologies, multiple network

systems come into coexistence. In this situation, the network operators worldwide have to

deploy different networks and pay high capital expenditure (CAPEX) and operation

expenditure (OPEX) accordingly. Therefore, the industry has been focusing on the

convergence of multiple network systems to reduce the expenditures of the operators.

The BSC6900 is an important network element (NE) of Huawei SingleRAN solution. The

BSC6900 adopts the industry-leading multiple radio access technologies (RATs), IP

transmission mode, and modular design. The BSC6900 also incorporates the functions of a

UMTS RNC and a GSM BSC, accommodating the need for multi-RAT convergence in the

mobile network.

The BSC6900 can be flexibly configured as a BSC6900 GSM, BSC6900 UMTS, or BSC6900

GU in different networks. The BSC6900 GSM or BSC6900 UMTS is referred to as the

BSC6900 in independent mode, and the BSC6900 GU is referred to as the BSC6900 in

integrated mode.

The BSC6900 GSM operates as an independent NE to access a GSM network and provides

the functions of a GSM BSC. The BSC6900 GSM is compliant with the standard 3GPP

Release 10, supports EDGE+, and can be upgraded to a BSC6900 GU through the addition of

UMTS boards and a software upgrade.

The BSC6900 UMTS operates as an independent NE to access a UMTS network and

provides the functions of a UMTS RNC. Compliant with the standard 3GPP Release 10, the

BSC6900 UMTS can be upgraded to the BSC6900 GU through addition of GSM boards and

software upgrades.

The BSC6900 GU operates as an integrated NE to access a network where GSM and UMTS

services coexist and provides the functions of a GSM BSC and a UMTS RNC. When the

BSC6900 GU accesses the GSM network, the 3GPP Release 10 applies. When the BSC6900

GU accesses the UMTS network, the 3GPP Release 10 applies.

Figure 1-1 shows the BSC6900.





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Figure 1-1 BSC6900

The BSC6900 connects to GSM and UMTS core networks (CNs) and manages base stations

in GSM and UMTS networks. Figure 1-2 shows the position of the BSC6900 in the network.

Figure 1-2 Position of the BSC6900 in the network

The interfaces between the BSC6900 and each NE in the UMTS network are as follows:

Iub: the interface between the BSC6900 and the NodeB

Iur: the interface between the BSC6900 and the RNC

Iur-g: the interface between the BSC6900 and the BSC

Iu-CS: the interface between the BSC6900 and the mobile switching center (MSC) or

media gateway (MGW)

Iu-PC: the interface between the BSC6900 and the serving mobile location center (SMLC)

Iu-PS: the interface between the BSC6900 and the serving GPRS support node (SGSN)

Iu-BC: the interface between the BSC6900 and the cell broadcast center (CBC)





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These interfaces are standard interfaces, through which the equipment from different vendors

can be interconnected.

The interfaces between the BSC6900 and each NE in the GSM network are as follows:

Abis: the interface between the BSC6900 and the BTS

A: the interface between the BSC6900 and the MSC or MGW

Gb: the interface between the BSC6900 and the SGSN

Lb: the interface between the BSC6900 and the SMLC

The A and Gb interfaces are standard interfaces, through which equipment from different

vendors can be interconnected.

The BSC6900 performs functions such as radio resource management (RRM), base station

management, power control, and handover control.

1.2 Benefits

Flexible Topologies, Smooth Evolution, and Outstanding Capability in Multi-RAT Convergence

The BSC6900 can be flexibly configured as a BSC6900 GSM, BSC6900 UMTS, or

BSC6900 GU. Therefore, it is applicable to various networking scenarios.

The BSC6900 can be configured as one of the three variants, facilitating the smooth evolution from GSM to GSM+UMTS and between GSM+UMTS and UMTS.

The functions of BSC6900 boards can be configured online to dynamically adjust the capacity allocation between the GSM and UMTS networks.

The BSC6900 is compatible with the BSC6810 and BSC6000 hardware. Through software

loading, the BSC6810 and BSC6000 in the live network can be upgraded to the BSC6900.

High Integration and Capacity

The BSC6900 conforms to the trend of higher capacity and fewer sites, saving space in the

equipment room and reducing power consumption. In addition, the BSC6900 meets the

requirements for rapid service growth and protects the operator's equipment investment.

The BSC6900 adopts the dual switching planes based on IP and time division

multiplexing (TDM). It provides a maximum of 480 Gbit/s data switching capacity on the IP plane and 128 kbit/s x 128 kbit/s data switching capacity on the TDM plane.

The BSC6900 boards use multi-core processors, which greatly increases the processing

capability.

Improved Utilization of Transmission Bandwidth Through Sharing of Transmission Resources

The BSC6900 provides a highly efficient transmission resource management algorithm,

which enables the transmission bandwidth to be shared between the GSM and UMTS networks. In this way, the transmission bandwidth utilization increases by 5% to 10%.

The IP interface board of the BSC6900 is shared between the GSM and UMTS networks

so that it can simultaneously transmit GSM and UMTS data.





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The BSC6900 supports the following flexible transmission modes shared between the

GSM and UMTS networks:

Abis/Iub over IP

2G/3G co-transmission based on TDM timeslot switching

A/Iu-CS over IP

Gb/Iu-PS over IP

Compatible Hardware in Different Networks

The BSC6900 shares a hardware platform with the BSC6000 and the BSC6810, and all the

BSC6000 and BSC6810 hardware can be used by the BSC6900.

The BSC6900 shares all the hardware and software of radio resource management

modules, operation and maintenance (O&M) modules, and clock synchronization

modules with the BSC6000 and the BSC6810.

The BSC6900 shares the hardware of most service processing modules, signaling

processing modules, and interface processing modules with the BSC6000 and the BSC6810. In addition, the working mode of boards can be configured online.

The BSC6900 maximizes the sharing of spare parts between the GSM and UMTS networks,

simplifying the management of spare parts and protecting the equipment investment.

Reduced OPEX Through the Shared O&M System

The BSC6900 integrates the two separate O&M systems of the traditional GSM and UMTS

networks into a unified O&M system, improving user experience and making it easier to

maintain the multi-RAT system.

The BSC6900 uses the Web-based local maintenance terminal (LMT) without the need to

install the client software. You can directly use the LMT after logging in to the BSC6900

homepage. The use of the LMT simplifies operations such as equipment commissioning and

software upgrades and reduces the O&M cost.

Expanded Network Capacity Through Optimized Co-RRM Algorithm

The Co-RRM algorithm implements the unified management and intelligent scheduling of

radio resources in the GSM and UMTS networks.

The traditional Co-RRM algorithm exchanges 2G/3G load information between the GSM and

UMTS networks through signaling procedures across the CNs. The Co-RRM algorithm

optimized by Huawei enables rapid transmission of 2G/3G load information (as internal

messages) within the BSC6900. The advantages are as follows:

Having no dependency on the CN equipment

Reducing the delay, adjusting the load in real time, and increasing the success rate of inter-RAT handovers

Decreasing the signaling flow on the standard interfaces and saving interface resources

The optimized Co-RRM algorithm maximizes the sharing of radio resources between the

GSM and UMTS networks, increasing network capacity.





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Improved Resource Utilization Through GSM/UMTS/LTE Interoperability

In seamless coverage scenarios, radio resources can be shared between the GSM and LTE

networks or between the GSM and UMTS networks, improving resource utilization.

In seamless coverage scenarios with the UMTS and LTE networks, the BSC6900 provides the

functions of cell selection and handover from the LTE network to the UMTS network. In

addition, radio resources can be shared, improving resource utilization.


Product Description 2 Architecture



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2 Architecture 2.1 Overview

The BSC6900 has a modular design and enhances resource utilization and system reliability

by fully interconnecting subracks and applying distributed resource pools to manage service

processing units. The backplane is universal and every slot is compatible with different types

of boards so that various functions can be performed. This improves the universality and

future evolution capability of the hardware platform.

The BSC6900 GU integrates the functions of the BSC6900 GSM and the BSC6900 UMTS

through the unified software management, shared OMU and GCU/GCG, and configuration of

GSM service boards and UMTS service boards in separate subracks. The MPS can be a GSM

subrack or a UMTS subrack.

Figure 2-1 Example configurations of the BSC6900 GU, BSC6900 GSM, and BSC6900 UMTS

2.2 Hardware Architecture

2.2.1 Cabinets

The BSC6900 uses the Huawei N68E-22 cabinet and N68E-21-N cabinet. The design

complies with the IEC60297 and IEEE standards.

Based on the subrack configuration, the BSC6900 cabinets are classified into the main

processing rack (MPR), extended processing rack (EPR), and transcoder rack (TCR), as

described in Table 2-1. The subracks should be configured from the bottom up.





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Table 2-1 Classification of the BSC6900 cabinets

Cabinet Contained Subrack Configuration Principle

MPR 1 MPS, 02 EPSs Only one MPR is configured.

EPR 13 EPSs No EPR or only one EPR is configured as

required by the actual service capacity.

TCR (only for

the BSC6900

GSM and the BSC6900 GU)

13 TCSs In BM/TC separated mode, 0 to 2 TCRs are configured.

Figure 2-2 BSC6900 cabinet

2.2.2 Subracks

In compliance with the IEC60297 standard, the BSC6900 subrack has a standard width of 19

inches. The height of each subrack is 12 U. Boards are installed on the front and rear sides of

the backplane, which is positioned in the center of the subrack.

One subrack provides 28 slots. The slots on the front of the subrack are numbered from 0 to

13, and those on the rear are numbered from 14 to 27.

Figure 2-3 shows the front view and rear view of the subrack.





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Figure 2-3 Front view (left) and rear view (right) of the subrack

The BSC6900 subracks are classified into the main processing subrack (MPS), extended

processing subrack (EPS), and transcoder subrack (TCS), as described in Table 2-2.

Table 2-2 Classification of the BSC6900 subracks

Subrack Quantity Function

MPS 1 The MPS performs centralized switching and

provides service paths for other subracks. It

also provides the service processing interface, O&M interface, and system clock interface.

EPS 05 The EPS performs the functions of user plane

processing and signaling control.

TCS (only for the

BSC6900 GSM and the

BSC6900 GU in BM/TC separated mode)

04 The TCS processes CS services and performs

the functions of voice adaptation and code

conversion.

2.2.3 Boards

Table 2-3 lists the hardware version and its corresponding boards.

Table 2-3 Hardware version and its corresponding boards

Hardware Version

Corresponding Boards

HW60 R8 OMUb, SCUa, TNUa, GCUa, DPUc, DPUd, XPUa, EIUa, FG2a, GOUa,

OIUa, and PEUa

HW68 R11 OMUa, SCUa, GCGa, GCUa, DPUb, SPUa, AEUa, AOUa, FG2a, GOUa,

PEUa, POUa, and UOIa

HW69 R11 OMUa, SCUa, TNUa, GCGa, GCUa, DPUc, DPUd, DPUe, SPUb, XPUb, AEUa, AOUc, EIUa, FG2c, GOUc, OIUa, PEUa, POUc, UOIa, and UOIc





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Hardware Version

Corresponding Boards

HW69 R13 OMUc, SAUa, SAUc, SCUb, TNUa, GCGa, GCUa, DPUe, DPUf, DPUg,

SPUb, XPUb, NIUa, AEUa, AOUc, EIUa, FG2c, GOUc, OIUa, PEUa,

POUc, and UOIc

HW69 R15 OMUc, SAUa, SAUc, SCUb, TNUa, GCGa, GCUa, DPUe, DPUf, DPUg,

SPUb, XPUb, NIUa, AEUa, AOUc, EIUb, FG2c, GOUc, OIUb, PEUa, POUc, and UOIc

NOTE The board names that are boldfaced in Table 2-3 indicate that the boards are not included in the previous hardware version.

Table 2-4 describes the mapping between hardware versions and software versions.

Table 2-4 Mapping between hardware versions and software versions

Hardware Version

BSC6000 BSC6810 BSC6900

GBSS8.1 RAN11.0 SRAN3.0/GBSS9.0/RAN11.1

SRAN5.0/GBSS12.0/RAN12.0



SRAN8.0/GBS

S15.0/RAN15.

0

HW60 R8 Supported Not

supported

Supported Supported Supported Supported Supported

HW68 R11 Not

supported

Supported Supported Supported Supported Supported Supported

HW69 R11 Not

supported

Not

supported

Supported Supported Supported Supported Supported

HW69 R13 Not

supported

Not

supported

Not supported Not supported Supported Supported Supported

HW69 R15 Not

supported

Not

supported

Not supported Not supported Not supported Not supported Supported

The BSC6900 boards can be classified into the O&M board, switching processing board,

clock processing board, signaling processing board, service processing board, service

identification board, and interface processing board, as described in Table 2-5.





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Table 2-5 Classification of the BSC6900 boards

Board Type

Board Name

Function Application Variant

O&M

board

OMUc Performs configuration management,

performance management, fault

management, security management, and loading management for the BSC6900.

Works as the O&M bridge of the

LMT/M2000 to provide the BSC6900

O&M interface for the LMT/M2000 and to

enable communication between the BSC6900 and the LMT/M2000.

Works as the interface to provide the

Web-based online help.

BSC6900 GSM

BSC6900 GU

BSC6900 UMTS

SAUa Collects data about the call history record

(CHR) and pre-processes the collected data.

Filters and summarizes raw data of the

BSC6900 as required by the Nastar and

uploads the pre-processed data to the Nastar through the M2000 for analysis.

BSC6900 GSM

BSC6900 GU

BSC6900 UMTS SAUc

Switching

processing board

SCUb Provides MAC/GE switching and enables

the convergence of ATM and IP networks.

MAC is short for Media Access Control

and ATM is short for asynchronous transfer mode.

Provides data switching channels.

Provides system-level or subrack-level

configuration and maintenance.

Distributes clock signals for the BSC6900.

The switching capability of the SCUb board is four times that of the SCUa board.

BSC6900 GSM

BSC6900 GU

BSC6900 UMTS

TNUa Provides the TDM switching and serves as

the center of the circuit switched domain.

Assigns resources of the TDM network and establishes network connections.

Provides communication processing on the

GE port.

BSC6900 GSM

BSC6900 GU

Clock

processing board

GCUa Obtains the system clock source, performs the

functions of phase-lock and holdover, and provides clock signals.

Unlike the GCUa board, the GCGa board can receive and process GPS signals.

BSC6900 GSM

BSC6900 GU

BSC6900 UMTS GCGa





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Board Type

Board Name


Signaling

processing

board

SPUb Manages user plane and signaling plane

resources in the subrack and processes

signaling.

The SPUb board processes the signaling on

the GSM/UMTS signaling plane. The

processing capability of the SPUb board is

75% to 100% higher than that of the SPUa board.

BSC6900 GSM

BSC6900 GU

BSC6900 UMTS

XPUb The XPUb board processes the signaling on

the GSM signaling plane. The processing

capability of the XPUb board is 75% to 100%

higher than that of the XPUa board.

BSC6900 GSM

BSC6900 GU

Service

processing board

DPUe Processes voice and data services within the system.

The DPUe board processes UMTS voice

services, UMTS data services, and GSM data services.

BSC6900 GSM

BSC6900 GU

BSC6900 UMTS

DPUf Encodes and decodes GSM voice services,

converts the speech frame format over the IP

speech channel, and processes voice services in the system.

BSC6900 GSM

BSC6900 GU

DPUg Processes GSM data services. BSC6900 GSM

BSC6900 GU

Service

identification board

NIUa Provides the service identification function. It

works with the service processing boards to schedule different types of services.

BSC6900 GSM

BSC6900 GU

BSC6900 UMTS

Interface

processing

board

AEUa Provides 32 channels of ATM over

E1s/T1s.

Extracts clock signals and sends the signals

to the GCUa or GCGa board.

BSC6900 GU

BSC6900 UMTS

AOUc Provides four channels of ATM over

channelized optical STM-1/OC-3.

Supports ATM over E1/T1 over SDH/SONET.

Provides 252 E1s or 336 T1s.

Extracts clock signals and sends the signals to the GCUa or GCGa board.

BSC6900 GU

BSC6900 UMTS

EIUb Provides 32 E1s/T1s.

Transmits, receives, encodes, and decodes

the 32 E1s/T1s. The E1 transmission rate is

2.048 Mbit/s; the T1 transmission rate is 1.544 Mbit/s.

BSC6900 GSM

BSC6900 GU





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Board Type

Board Name


FG2c Provides 12 channels over FE or 4 channels

over GE.

Supports IP over FE/GE.

BSC6900 GSM

BSC6900 GU

BSC6900 UMTS

GOUc Provides four channels over GE.

Supports IP over GE.

BSC6900 GSM

BSC6900 GU

BSC6900 UMTS

OIUb Provides one channelized STM-1 with the

rate of 155.52 Mbit/s.

BSC6900 GSM

BSC6900 GU

PEUa Provides 32 channels of IP over E1s/T1s.


BSC6900 GSM

BSC6900 GU

BSC6900 UMTS

POUc Provides four channels of TDM/IP over

channelized optical STM-1/OC-3.

Supports IP over E1/T1 over SDH/SONET.

Provides the load bearer capability of 252 E1s or 336 T1s.

Extracts clock signals and sends the signals

to the GCUa or GCGa board.

BSC6900 GSM

BSC6900 GU

BSC6900 UMTS

UOIc Provides eight channels over unchannelized

STM-1/OC-3c.

Supports ATM over SDH/SONET.


BSC6900 GU

BSC6900 UMTS

2.3 Software Architecture

The BSC6900 software is designed with a layered architecture. Each layer is dedicated to its

own functions and provides services for other layers. At the same time, the technical

implementation and physical topology of each layer is isolated from other layers. Figure 2-4

shows the software architecture of the BSC6900.





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Figure 2-4 Software architecture of the BSC6900

Table 2-6 describes the functions of each layer in the BSC6900 software architecture.

Table 2-6 Functions of each layer in the BSC6900 software architecture

Layer Function

Infrastructure Provides the hardware platform and hides the lower-layer hardware

implementations.

Hides the differences between operating systems, and provides enhanced and supplementary functions for the system.

System

management

plane (SMP)

Provides the O&M interface to perform the O&M functions of the

system.

Internal

Communication

Control Plane (ICCP)

Transfers internal maintenance messages and service control

messages between different processors, implementing efficient control over distributed communication.

Operates independently of the infrastructure layer.

Service

Transport

Control Plane

(STCP)

Transfers service data on the user plane and control plane at the

network layer between NEs.

Separates the service transport technology from the radio access

technology and makes the service transport transparent to the

upper-layer service.

Provides service bearer channels.





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Layer Function

Application Implements the basic functions of BSC service control and

concentrates on the upper-layer service control, such as call processing, mobility management, and RRM.

Hides the topology characteristics of various resources in the network and in the equipment.

Provides the resource access interface, hides the distribution of

internal resources and network resources, maintains the mapping

between the service control and the resource instance, and controls the association between various resources.

Manages the resources and O&M status, responds to the resource

request from the upper layer, and hides the resource implementation

from the upper layer.

Isolates the upper-layer services from the hardware platform to facilitate the hardware development.

2.4 Reliability

The resource pool design and redundancy mechanism are widely used in the system reliability

design of the BSC6900. The techniques of detecting and isolating the faults in the boards and

in the system are optimized and the software fault tolerance capability is improved to enhance

system reliability.

2.4.1 System Reliability

The BSC6900 system reliability is designed with the following features:

High-reliability architecture design

The design of dual switching planes, with up to 480 Gbit/s GE star non-blocking

switching capability per subrack, prevents the single point failure in the deployment of the high-capacity BSC6900.

Moreover, the port trunking technology is adopted on the switching boards. The port

trunking function allows data backup in case of link failures, preventing inter-plane

switchovers and cascading switchovers and improving the reliability of intra-system communication.

Dual clock planes are used in the clock transmission between the GCUa/GCGa board

and the SCUb board. Therefore, a single point of failure does not affect the normal operation of the system clock.

Resource pool design

In case of overload, the system implements load sharing between the control plane and

the user plane by employing a full resource pool design. This effectively prevents suspension because of overload, improving resource utilization and system reliability.

Redundancy mechanism

All the BSC6900 hardware adopts the redundancy mechanism. The rapid switchover

between active and standby parts improves system reliability. Moreover, with the quick

fault detection and rectification mechanism, the impact of the faults on services is minimized.





15

Flow control

The system performs flow control based on the central processing unit (CPU) and

memory usage. Therefore, the BSC6900 can continue working by regulating the items

pertaining to performance monitoring, resource auditing, and resource scheduling in the

case of CPU overload and resource congestion. In this way, the system reliability is

enhanced.

2.4.2 Hardware Reliability

The BSC6900 hardware reliability is designed with the following features:

The system uses the multi-level cascaded and distributed cluster control mode. Several

CPUs form a cluster processing system. The communication channels between CPUs are

based on the redundancy design or anti-suspension/breakdown design.

The system uses the redundancy design, as described in Table 2-7, to support the hot

swap of boards and backup of boards and ports. Therefore, the system has a strong fault tolerance capability.

Table 2-7 Board redundancy

Board Redundancy Mode

AEUa Board redundancy

AOUc Board redundancy + MSP 1:1 or MSP 1+1 optical port

redundancy

DPUe/DPUf/DPUg Board resource pool

EIUb Board redundancy

FG2c Board redundancy + board resource pool + GE/FE port redundancy or load sharing

GCUa/GCGa Board redundancy

GOUc Board redundancy + board resource pool + GE port

redundancy or load sharing

OIUb Board redundancy

OMUc Board redundancy

PEUa Board redundancy

POUc Board redundancy + MSP 1:1 or MSP 1+1 optical port

redundancy

SAUa/SAUc Single configuration

SCUb Board redundancy + port trunking on GE ports

SPUb/XPUb Board redundancy

NIUa Board resource pool

TNUa Board redundancy





16

Board Redundancy Mode

UOIc Board redundancy + MSP 1:1 or MSP 1+1 optical port

redundancy

An isolation mechanism is used. When entity A fails to accomplish a task, entity B that

has the same functions as entity A takes over the task. Meanwhile, entity A is isolated until it is restored.

When a board with a single function is faulty, you can restart the board.

All boards support dual-BIOS. BIOS is short for basic input/output system. Faults in one

BIOS do not affect the startup or operation of the boards.

The system uses the nonvolatile memory to store important data.

With advanced integrated circuits, the system features high integration, sophisticated

technology, and high reliability.

All the parts of the system have high quality and pass the aging test. The hardware

assembly process is strictly controlled. These methods ensure the high stability and reliability for long-term operation.

2.4.3 Software Reliability

The BSC6900 software reliability is designed with the following features:

Scheduled check on crucial resources

The software check mechanism checks various software resources in the system. If

resources are out of service because of software faults, this mechanism can release abnormal resources and generate related logs and alarms.

Task monitoring

When the software is running, internal software faults and some hardware faults can be

monitored through the monitoring process. The monitoring process monitors the task running status and reports errors to the O&M system.

Data check

The software integrity check and digital signature technique are adopted to prevent the software from being tampered with during the transmission and storage.

The software performs scheduled or event-driven data consistency checks, restores data selectively or preferably, and generates logs and alarms.

Data backup

Both the data in the OMU database and the data of other boards can be backed up to

ensure data reliability and consistency.

Operation log storage

The system automatically records historical operations into logs. The operation logs help in locating and rectifying the faults caused by misoperations.


Product Description 3 Configurations



17

3 Configurations 3.1 Overview

In the BSC6900, the MPS or EPS can be configured with either GSM or UMTS service

processing boards.

When the BSC6900 is configured as a BSC6900 GU or BSC6900 GSM, the TCS can be

configured. Based on the TCS configuration, a BSC6900 GU or BSC6900 GSM supports

three configuration modes: BM/TC combined, BM/TC separated, and A over IP. The basic

module (BM) refers to the MPS and EPS, and the transcoder (TC) refers to the TCS. Table

3-1 describes the configuration modes of a BSC6900 GU or BSC6900 GSM based on the

TCS configuration. When the BSC6900 is configured as a BSC6900 UMTS, these

configuration modes do not apply.

Table 3-1 Configuration modes of a BSC6900 GU or BSC6900 GSM

Configuration Mode

Description Characteristic

BM/TC

combined

The TCS is not configured. The

boards that implement the TC

functions are inserted into the slots

in the MPS or EPS.

With the same capacity, fewer

cabinets and fewer subracks are

required in the BSC, increasing

the hardware integration.

BM/TC

separated

This mode is applicable in

scenarios where the BSC is

configured in a remote equipment

room. In this mode, the BSC is

configured with a separate TCS,

which is placed in the TCR on the

MSC side. The MPS must work in

GSM mode.

The TCS can be configured in the

TCR on the MSC side, saving

transmission resources between the BSC and the MSC.

A over IP The TCS is not configured. The TC

functions are implemented by the MGW.

The BSC is directly connected to

the CN equipment without a TC,

reducing the CAPEX of the

operator. In addition, the number

of speech coding and decoding

times is decreased to improve the

speech quality. This mode meets

the needs for network evolution.





18

The capacity configurations of the BSC6900 GSM, BSC6900 UMTS, and BSC6900 GU are

different from one another. For details, see section 3.2 "Capacity Configuration of the

BSC6900 GSM", section 3.3 "Capacity Configuration of the BSC6900 UMTS", and section

3.4 "Capacity Configuration of the BSC6900 GU".

3.2 Capacity Configuration of the BSC6900 GSM

3.2.1 Hardware Capacity Configuration in BM/TC Combined Mode

Table 3-2 lists the capacity of a BSC6900 GSM in TDM transmission mode. In this table, the

BSC6900 GSM is configured with HW69 R15 boards and works in BM/TC combined mode.

Table 3-2 Capacity of a BSC6900 GSM in TDM transmission mode (HW69 R15 boards, BM/TC combined mode)

Typical Configuration

Specifications

1 MPS 1 EPS 1 MPS+1 EPS

1 MPS+2 EPSs

Maximum number of

cabinets

1 1 1 1

Maximum number of

equivalent busy hour call attempts (BHCA) (k)

1750 2625 4375 5900

Maximum traffic volume

(Erlang)

6500 9750 16,250 24,000

Maximum number of TRXs 1024 1536 2560 4096

Maximum number of active

packet data channels

(PDCHs) (MCS-9)

4096 6144 10,240 16,384

3.2.2 Hardware Capacity Configuration in BM/TC Separated Mode

Table 3-3 lists the capacity of a BSC6900 GSM. In this table, the BSC6900 GSM is

configured with HW69 R15 boards and works in BM/TC separated mode with the Abis

interface not using the IP transmission mode.





19

Table 3-3 Capacity of a BSC6900 GSM (HW69 R15 boards, BM/TC separated mode, Abis interface not using the IP transmission mode)


Specifications

1 MPS+1 TCS

1 EPS+1 TCS

1 MPS+1 EPS+2 TCS

1 MPS+2 EPSs+3 TCSs

Maximum number of

cabinets

2 2 2 2

Maximum number of

equivalent BHCA (k)

1750 2625 4375 5900


(Erlang)

6500 9750 16,250 24,000



PDCHs (MCS-9)

4096 6144 10,240 16,384


configured with HW69 R15 boards and works in BM/TC separated mode with the Abis

interface using the IP transmission mode.

Table 3-4 Capacity of a BSC6900 GSM (HW69 R15 boards, BM/TC separated mode, Abis interface using the IP transmission mode)


Specifications

1 MPS+1 TCS

1 EPS+1 TCS

1 MPS+1 EPS+3 TCSs

1 MPS+2 EPSs+3 TCSs

Maximum number of

cabinets

2 2 2 2

Maximum number of

equivalent BHCA (k)

1750 3500 5250 5900


(Erlang)

6500 13,000 19,500 24,000



PDCHs (MCS-9)

4096 8192 12,288 16,384

3.2.3 Hardware Capacity Configuration in A over IP Mode


configured with HW69 R15 boards and works in Abis over TDM and A over IP mode.





20

Table 3-5 Capacity of a BSC6900 GSM (HW69 R15 boards, Abis over TDM and A over IP mode)


Specifications


1 MPS+2 EPSs

Maximum number of

cabinets

1 1 1 1

Maximum number of

equivalent BHCA (k)

1750 3500 5250 5900


(Erlang)

6500 13,000 19,500 24,000



PDCHs (MCS-9)

4096 8192 12,288 16,384


configured with HW69 R15 boards and works in Abis over IP and A over IP modes.

Table 3-6 Capacity of a BSC6900 GSM (HW69 R15 boards, Abis over IP and A over IP modes)


Specifications


1 MPS+2 EPSs

Maximum number of

cabinets

1 1 1 1

Maximum number of equivalent BHCA (k)

1750 6125 7875 11,000


(Erlang)

6500 22,750 29,250 45,000



PDCHs (MCS-9)

4096 14,336 18,432 32,768

3.3 Capacity Configuration of the BSC6900 UMTS

The BSC6900 UMTS supports the flexible configuration of control plane and user plane data

in different scenarios. In each scenario, the capacity configured for the BSC6900 UMTS

depends on actual traffic models.

There are three traffic models for the BSC6900 UMTS:

Balanced traffic model

This model applies when voice services and data services are balanced in a network.





21

High-PS traffic model

This model is applicable in scenarios where subscribers use much more data services

than voice services. In this model, the average PS throughput per user is high.

Traffic model for smart phones

In this model, control plane signaling is frequently exchanged and user plane data is transmitted mainly through small packets.

Sections 3.3.1 "Capacity of the BSC6900 UMTS in the Balanced Traffic Model", 3.3.2

"Capacity of the BSC6900 UMTS in the High-PS Traffic Model", and 3.3.3 "Capacity of the

BSC6900 UMTS in the Traffic Model for Smart Phones" describe the capacity of a BSC6900

UMTS in typical configurations in the balanced traffic model, high-PS traffic model, and

traffic model for smart phones, respectively.

3.3.1 Capacity of the BSC6900 UMTS in the Balanced Traffic Model

Table 3-7 describes the balanced traffic model for the BSC6900 UMTS.

Table 3-7 Balanced traffic model for the BSC6900 UMTS (per user in busy hours)

Item Specification Description

CS voice traffic

volume

20 mE Adaptive multi-rate (AMR) speech service, 0.96

BHCA

CS data traffic

volume

1.5 mE UL 64 kbit/s/DL 64 kbit/s CS data service, 0.04

BHCA

PS throughput 4500 bit/s 2 BHCA

Proportion of soft

handovers

30% Proportion of calls using two channels

simultaneously to all calls

Number of

handovers per CS call

8 Average number of handovers per CS call

Number of

handovers per PS

call

5 Average number of handovers per PS call

Number of

non-access stratum (NAS) procedures

3.6 Number of NAS procedures between the CN and

the UE, including the location area update, IMSI

attach/detach, routing area update, GPRS attach/detach, and SMS

Table 3-8 lists the capacity of a BSC6900 UMTS in typical configurations. In this table, the

BSC6900 UMTS is configured with HW69 R15 boards and uses the balanced traffic model.





22

Table 3-8 Capacity of a BSC6900 UMTS in typical configurations (HW69 R15 boards)

Number of Online Users

CS Voice Service Capacity (Erlang)

PS Service Capacity (Iub UL+DL) (Mbit/s)

BHCA (k) BHCA (k)

(Include SMS)

1,760,000 45,738 7920 5300 7000

NOTE

The CS voice service capacity and PS service capacity can reach the maximum at the same time.

3.3.2 Capacity of the BSC6900 UMTS in the High-PS Traffic Model

Table 3-9 describes the high-PS traffic model for the BSC6900 UMTS.

Table 3-9 High-PS traffic model for the BSC6900 UMTS (per user in busy hours)


CS voice traffic

volume

3 mE AMR speech service, 0.144 BHCA

CS data traffic

volume

0.2 mE UL 64 kbit/s/DL 64 kbit/s CS data service,

0.0053 BHCA

PS throughput 43500 bit/s UL 64 kbit/s/DL 384 kbit/s, 3 BHCA

Proportion of soft

handovers



Number of handovers

per CS call


Number of handovers

per PS call


Number of NAS

procedures

3.6 Number of NAS procedures between the CN

and the UE, including the location area update,

IMSI attach/detach, routing area update, GPRS attach/detach, and SMS

Table 3-10 lists the capacity of the BSC6900 UMTS in typical configurations. In this table,

the BSC6900 UMTS is configured with HW69 R15 boards and uses the high-PS traffic

model.





23





BHCA (k) BHCA (k)

(Include SMS)

925,000 3606 40,200 2900 3840

NOTE


3.3.3 Capacity of the BSC6900 UMTS in the Traffic Model for Smart Phones

Table 3-11 describes the traffic model for smart phones for the BSC6900 UMTS.

Table 3-11 Traffic model for smart phones for the BSC6900 UMTS (per user in busy hours)


CS voice traffic volume 3 mE AMR speech service, 0.8 BHCA

CS data traffic volume 0.1 mE UL 64 kbit/s/DL 64 kbit/s CS data service,

0.0001 BHCA

PS throughput 1600 bit/s UL 1.5 kbit/s/DL 7.5 kbit/s, 10 BHCA

Proportion of soft

handovers



Number of handovers

per CS call


Number of handovers

per PS call


Number of NAS

procedures

3.8 Number of NAS procedures between the CN

and the UE, including the location area

update, IMSI attach/detach, routing area

update, GPRS attach/detach, and SMS

Table 3-12 lists the capacity of a BSC6900 UMTS in typical configurations. In this table, the

BSC6900 UMTS is configured with HW69 R15 boards and uses the traffic model for smart

phones.





24





BHCA (k) BHCA (k)

(Include SMS)

1,130,000 47,000 1860 12,800 14,000

NOTE


3.4 Capacity Configuration of the BSC6900 GU

Table 3-13 lists the capacity of a BSC6900 GU. In this table, the BSC6900 GU is configured

with HW69 R15 boards.

Table 3-13 Capacity of a BSC6900 GU (HW69 R15 boards)


Specifications

1 MPS (GSM)+3 EPSs (GSM)+2 EPSs (UMTS)

GSM in All-TDM and BM/TC Combined Mode


GSM in All-IP Mode

1 MPS (UMTS)+4 EPSs (UMTS)+1 EPS (GSM)



GSM in All-IP Mode

Maximum UMTS

traffic volume (Erlang)

53,600 53,600 140,700 140,700

Maximum UMTS

PS (UL+DL) data

throughput (Mbit/s)

12,800 12,800 33600 33,600

Maximum number

of NodeBs

1440 1440 3060 3060

Maximum number

of UMTS cells

2400 2400 5100 5100

Maximum number

of GSM TRXs

4096 8192 1536 3584

Maximum number

of equivalent

BHCA for GSM

(k)

5900 11,000 2625 6125

Maximum number

of active PDCHs for GSM (MCS-9)

16,384 32,768 6144 14336





25


Specifications




GSM in All-IP Mode




GSM in All-IP Mode

Maximum GSM

traffic volume (Erlang)

24,000 45,000 9750 22750


Product Description 4 Operation and Maintenance



26

4 Operation and Maintenance 4.1 Overview

The BSC6900 provides convenient local maintenance and remote maintenance and supports

multiple flexible O&M modes.

The BSC6900 provides hardware-independent O&M functions such as security management,

fault management, alarm management, equipment management, and software management.

Users can use man-machine language (MML) commands to perform O&M and configuration

functions and use the graphical user interface (GUI) to perform O&M functions. This meets

the operational requirements from different users.

Figure 4-1 shows the O&M network of the BSC6900.

Figure 4-1 O&M network of the BSC6900





27

The O&M system of the BSC6900 adopts the browser/server (B/S) separated mode. The

OMUc board of the BSC6900 works as the server, and the LMT is used for local maintenance.

The iManager M2000 is the centralized O&M system, which is used for remote maintenance.

The alarm box connects to the LMT and provides audible and visible indications for alarms.

NOTE The OMU boards described in this document refer to the OMUa, OMUb, and OMUc boards.

4.2 Benefits

Web-based LMT Improving User Experience

The O&M system of the BSC6900 uses the web-based LMT. You can connect the LMT to the

OMU board to perform O&M operations for the BSC6900 and to obtain the online help of the

LMT. All the operation results are displayed on the LMT through the web browser.

The web-based LMT does not require software installation and software upgrade, simplifying

user operations and improving user experience.

Diversified O&M Modes

The BSC6900 provides local maintenance and remote maintenance and supports multiple

O&M modes to meet the needs in various O&M scenarios.

The LMT for local maintenance can access the BSC6900 in the following ways:

Through the port on the panel of the OMU board

Through the virtual local area network (VLAN)

Through the Intranet and Internet

The iManager M2000 for remote maintenance can access the BSC6900 in the following

ways:

Through the VLAN

Through the Intranet and Internet

Powerful Hardware Management Functions for Quickly Locating and Rectifying Hardware Faults

The BSC6900 provides a prewarning mechanism for hardware faults, ensuring that sufficient

time is available to rectify the faults before services are interrupted.

The BSC6900 provides functions such as status query, data configuration, and status

management of internal devices.

When a hardware fault occurs, the BSC6900 alerts the user by generating alarms and flashing

indicators and provides suggestions to guide the user in troubleshooting. The alarm is cleared

upon the rectification of the fault.

The BSC6900 provides the functions of isolating a faulty part, such as activating or

deactivating the faulty part. When a faulty part needs to be replaced, the hot swap function

enables the quick power-on of the substitute, reducing the time in fault rectification.





28

In case of emergencies, you can reset the board to quickly rectify the fault.

Advanced Software Management Functions for Secure and Smooth Upgrades

The BSC6900 provides a remote upgrade tool, which enables the operator to upgrade the

software at the O&M center without interrupting ongoing services. The remote upgrade tool

provides the function of backing up crucial data in the system. When the upgrade fails,

version rollback can be performed immediately and the system returns to normal in a short

period.

After the upgrade is complete, a version consistency check is performed to ensure the version

correctness.

Rich Tracing and Detection Mechanisms for Reliably Monitoring the Network Status

The BSC6900 provides the tracing and monitoring functions on multiple layers and multiple

levels to accurately locate faults. The signaling tracing functions include user tracing,

interface tracing, and message tracing.

The tracing messages are saved as files, which can be viewed through the review and tracing

functions of the LMT.

Easy Equipment Installation and Commissioning, and Efficient Network Upgrade Scheme for Quick Network Deployment

Before delivery, boards and operating systems are installed in and common data is configured

for the Huawei BSC6900. In addition, the BSC6900 is correctly assembled and passes rigid

tests. You only need to install the cabinet and cables on site. After the hardware installation is

complete, you can load software and data files to commission the software and hardware.

The BSC6900 can be configured as one of the three variants through board adjustments and

software upgrades, facilitating the smooth evolution from GSM to GSM+UMTS and between

GSM+UMTS and UMTS. In addition, the BSC6900 provides the 2G/3G convergence

solution and protects the operator's investment.

Robust Security Operation Mechanism Preventing Misoperations

The BSC6900 provides a man-machine interface and prompts users to confirm an important

operation. This ensures that an operation is performed only when it is required and prevents

service interruptions caused by misoperations.


Product Description 5 Technical Specifications



29

5 Technical Specifications 5.1 Technical Specifications

5.1.1 Capacity Specifications

BSC6900 in Independent or Integrated Mode

Item Specification

BSC6900

GSM/BSC6900 GU

(GSM capacity)

Maximum number of equivalent

BHCA (k)

TDM: 5900

IP: 11,000

Traffic volume (Erlang) TDM: 24,000

IP: 45,000

Number of TRXs TDM: 4096

IP: 8192

Number of configured PDCHs TDM: 30,720

IP: 61,440

Number of active PDCHs

(MCS-9)

TDM: 16,384

IP: 32,768

Gb interface throughput (Mbit/s) TDM: 1536

IP: 3072

BSC6900 UMTS BHCA (k) 5300

BHCA (k)(Include SMS) 7000

Traffic volume (Erlang) 167,500

PS (UL+DL) Data Throughput

(Mbit/s)

40,000

Number of NodeBs 3060

Number of cells 5100





30

BSC6900 in Independent or Integrated Mode

Item Specification

BSC6900 GU (UMTS

capacity)

BHCA (k) 2630

BHCA (k)(Include SMS) 3120

Traffic volume (Erlang) 140,700

PS (UL+DL) Data Throughput

(Mbit/s)

33,600

Number of NodeBs 3060

Number of cells 5100

NOTE

This table provides the capacity specification of the BSC6900. On a live network, the actual capacity of the BSC6900 is determined by the number of configured subracks and boards.

5.1.2 Structural Specifications

Item Specification

Cabinet standard The structural design conforms to the IEC60297 and IEEE

standards.

Dimensions (H x W

x D)

N68E-22 cabinet: 2200 mm x 600 mm x 800 mm

N68E-21-N cabinet: 2130 mm x 600 mm x 800 mm

Height of the

available space

N68E-22 cabinet: 46 U

N68E-21-N cabinet: 44 U

Cabinet weight N68E-22 cabinet: 320 kg

N68E-21-N cabinet: 380 kg

Load-bearing

capacity of the floor

in the equipment room

450 kg/m2

5.1.3 Clock Specifications

Item Specification

Clock precision It meets the requirements for the stratum-3 clock.

Clock accuracy 4.6 x 10-6

Pull-in range 4.6 x 10-6





31

Item Specification

Maximum frequency offset 2 x 10-8

/day

Initial maximum frequency offset 1 x 10-8

5.1.4 Electrical Specifications

Sub-Item Specification

Power input 48 V DC

Power range 40 V to 57 V

Power consumption of a single

GSM subrack

MPS: 1300 W

EPS: 1300 W

TCS: 1000 W


UMTS subrack

In ATM transmission:

MPS: 1700 W

EPS: 1730 W

In IP transmission:

MPS: 1490 W

EPS: 1450 W


cabinet

The cabinet power consumption equals the sum of

power consumption of all subracks in the cabinet.

It is recommended that the power distribution system

provide a maximum of 5100 W power per cabinet to facilitate capacity expansion.

NOTE

The power consumption specification of a GSM subrack is the maximum power consumption in typical configurations. The power consumption specification of a UMTS subrack differs between the ATM and IP transmission modes. In ATM transmission mode, the Iu interface uses unchannelized STM-1 transmission, and the Iub interface uses channelized STM-1 transmission. In IP transmission

mode, the Iu and Iub interfaces use GE optical transmission. The power consumption in actual networks depends on specific configurations.

You can calculate the power consumption of the cabinet in any subrack combination mode by using the preceding specification.





32

5.1.5 Space Specifications

Figure 5-1 Space requirements for the equipment room

If cables are routed overhead, the distance between the cabinet top and the ceiling of the equipment room must be greater than or equal to 1000 mm.

If cables are routed under the floor, the height of the ESD floor must be greater than or

equal to 200 mm.

The spacing shown in Figure 5-1 is the minimum possible value. The actual spacing is

wider than that shown in Figure 5-1.

5.1.6 Environmental Specifications

Item Specification

Storage Environment

Transportation Environment

Operating Environment

Temperature

range

40C to +70C 40C to +70C Long-term: 0C to 45C

Short-term: 5C to +55C

Humidity

range

10% RH to 100% RH 5% RH to 100% RH Long-term: 5% RH to 85%

RH

Short-term: 5% RH to 95%

RH

NOTE

The short-term operation refers to the operation with the duration not more than 96 hours at a time and with the accumulative duration not more than 15 days a year.





33

5.1.7 Transmission Ports

Transmission Type Connector

E1/T1 DB44

Channelized STM-1/OC-3 LC/PC

Unchannelized STM-1/OC-3c LC/PC

FE RJ45

GE RJ45

LC/PC

5.1.8 Reliability Specifications

Item Specification

System availability > 99.999%

Mean time between failures (MTBF) 525,000 hours

Mean time to repair (MTTR) 1 hour

5.2 Compliance Standards

5.2.1 Power Supply Standard

Item Standard

Power supply ETS300 132-2

5.2.2 Grounding Standard

Item Standard

Grounding ETS300 253





34

5.2.3 Environment Standards

Item Standard

Noise ETS300 753

GR-63-CORE

5.2.4 Safety Standards

Item Standard

Earthquake-proofing ETS300 019-2-4-AMD

GR-63-CORE

YDN5083

Safety IEC60950, EN60950, UL60950

IEC60825-1

IEC60825-2

IEC60825-6

GB4943

GR-1089-CORE

Surge protection IEC 61024-1 (1993)

IEC 61312-1 (1995)

IEC 61000-4-5 (1995)

ITU-T K.11 (1993)

ITU-T K.27 (1996)

ITU-T K.41 (1998)

EN 300 386 (2000)

GR-1089-CORE (1999)

YDJ 26-89

GB 50057-94

YD5098-2001





35

5.2.5 EMC Standards

Item Standard

Electromagnetic

compatibility (EMC)

ETSI EN 300 386 V1.3.2 (2003-05)

CISPR 22 (1997)

IEC61000-4-2

IEC61000-4-3

IEC61000-4-4

IEC61000-4-5

IEC61000-4-6

IEC61000-4-29

GB9254-1998

FCC Part 15

NEBS Bellcore GR-1089-CORE issue 2

5.2.6 Environment Standards

Item Standard Class

Storage environment ETS300 019-1-1 CLASS 1.2

Transportation

environment

ETS300 019-1-2 CLASS 2.3

Operating environment ETS300 019-1-3 CLASS 3.1


Product Description A Acronyms and Abbreviations



36

A Acronyms and Abbreviations 3GPP Third Generation Partnership Project

AMR adaptive multirate

ATM Asynchronous Transfer Mode

BHCA busy hour call attempts

BIOS basic input/output system

BM/TC basic module/transcoder

BSC base station controller

BTS base transceiver station

CBC cell broadcast center

CHR call history record

CN core network

Co-RRM co-radio resource management

CPU central processing unit

CS circuit switched

DSP digital signal processor

EPR extended processing rack

EPS extended processing subrack

FE fast Ethernet

GE gigabit Ethernet

GSM Global System for Mobile communications





37

GUI graphical user interface

ICCP Internal Communication Control Plane

IP Internet Protocol

LMT local maintenance terminal

LTE Long Term Evolution

MAC Media Access Control

MGW media gateway

MME mobile management entity

MML Man-machine language

MPR main processing rack

MPS main processing subrack

MSC mobile switching center

MSP multiplex section protection

MTBF mean time between failures

MTTR mean time to repair

NAS non-access stratum

O&M operation and maintenance

OS operating system

PDCH packet data channel

PPP Point-to-Point Protocol

PS packet switched

RNC Radio Network Controller

RRM Radio Resource Management

SDH synchronous digital hierarchy

SGSN serving GPRS support node

SMLC serving mobile location center

SMP System management plane

STCP Service Transport Control Plane

STM-1 synchronous transport module level 1

TCH traffic channel

TCR transcoder rack

TCS transcoder subrack

TDM time division multiplexing





38

TRX transceiver

UE user equipment

UMTS Universal Mobile Telecommunications System

VLAN Virtual local area network

Documents

BSC6900 Product Description