RNC System Description

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RNC System Description


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RNC

System Description

Document Version 02 (2007-03-23)

Product Version V200R009

Huawei Technologies Co., Ltd. provides customers with comprehensive technical support

and service. Please feel free to contact our local office or company headquarters.

Huawei Technologies Co., Ltd.

Address: Administration Building, Huawei Technologies Co., Ltd.,

Bantian, Longgang District, Shenzhen, P. R. China

Postal Code: 518129

Website: http://www.huawei.com
http://www.huawei.com/http://www.huawei.com/


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Copyright 2007 Huawei Technologies Co., Ltd.

All Rights Reserved.

No part of this manual may be reproduced or transmitted in any form or by any means without

prior written consent of Huawei Technologies Co., Ltd.

Trademarks

and other Huawei trademarks are the trademarks or registered trademarks of Huawei

Technologies Co., Ltd. in the Peoples Republic of China and certain other countries.

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

respective holders.

Notice

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

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

and recommendations in this manual do not constitute the warranty of any kind, express or

implied.


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Table of Contents

Chapter 1 Introduction to the RNC.............................................................................................. 1

Chapter 2 Key Benefits................................................................................................................ 3

Chapter 3 System Architecture................................................................................................... 9

Chapter 4 Operation and Maintenance.....................................................................................23

Chapter 5 Reliability................................................................................................................... 36

Chapter 6 Technical Specifications........................................................................................... 40

Chapter 7 Installation................................................................................................................. 55

Appendix Acronyms and Abbreviations................................................................................... 58

Commercial in Confidence i


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Chapter 1 Introduction to the RNC

1.1 About This Chapter

This chapter introduces the Radio Network Controller (RNC). The chapter consists of

the following sections:

Position of the RNC in the WCDMA Network

1.2 Position of the RNC in the WCDMA Network

The RNC is an important element of the WCDMA network. RNCs and NodeBs

compose the UMTS Terrestrial Radio Access Network (UTRAN). Figure 1 shows the

position of the RNC in the WCDMA network.

UTRANUu

UE

IuCN

Iu-CS

MSC server

MGW

Iub

NodeB

NodeB

Iub

NodeB RNC

RNC

Iu-PS

Iu-BC

CBC

SGSN

Iur

Iub

CN: Core Network CBC: Cell Broadcast Center

MGW: Media Gateway RNC: Radio Network Controller

SGSN: Serving GPRS Support Node UE: User Equipment

Commercial in Confidence Page 1 of 69


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UTRAN: UMTS Terrestrial Radio Access Network

Figure 1 Position of the RNC in the WCDMA network

As shown in Figure 1, each RNC is connected to:

NodeB(s) through the lub interface

The MSC (or the MSC server and MGW in R4/R5/R6), which processes Circuit

Switched (CS) services through the Iu-CS interface

The SGSN, which processes Packet Switched (PS) services through the Iu-PS

interface

The CBC, which processes broadcast services through the Iu-BC interface

Other RNCs through the Iur interface to exchange information

1.3 Main Functions of the RNC

The RNC has the following main functions:

Broadcasting system information and controlling UE access

Performing mobility management, such as handover and Serving Radio Network

Subsystem (SRNS) relocation

Performing radio resource management, such as macro diversity combining,

power control, and cell resource allocation

Providing radio bearer services for both PS and CS domains

Providing transmission channels between the CN and UEs Ciphering and deciphering the signaling and data on radio channels

The model of Huawei RNC is BSC6810. All its interfaces, including the Iub, Iu-CS, Iu-

PS, Iu-BC and Iur are standard interfaces, which connect the BSC6810 to the NodeB,

MSC, SGSN, CBC, and RNC of other vendors.



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Chapter 2 Key Benefits


This chapter consists of the following sections:

All-IP Platform of Advanced Radio Controller

High Integration and Large Capacity

SPM-Based Modular Design and Flexible Expansion

Multiple Clock Sources

Diverse Transmission Solutions Advanced RRM Algorithms

Advanced Solutions to Radio Data Services

High Compatibility of Protocols

2.2 All-IP Platform of Advanced Radio Controller

The BSC6810 uses the all-IP Platform of Advanced Radio Controller (PARC)

developed by Huawei. This platform can meet the requirements for the development

of high-speed packet services.

2.3 High Integration and Large Capacity

The BSC6810 has the following features:

The BSC6810 is highly integrated. Based on the Gigabit Ethernet (GE) star non-

blocking switching on the Medium Access Control (MAC) sublayer, the BSC6810

achieves a central switching capacity of 118 Gbit/s.

The BSC6810 supports up to 1,700 NodeBs and 5,100 cells.

The BSC6810 supports up to 51,000 Erlang voice traffic or 3,264 Mbit/s (UL +

DL) PS data capacity. Such capacity, however, is implemented by only two

cabinets.

The BSC6810 provides a single-cabinet solution supporting 24,000 Erlang voice

traffic or 1,536 Mbit/s (UL + DL) PS data capacity.

2.4 SPM-Based Modular Design and Flexible Expansion

The BSC6810 adopts the modular design based on Service Processing Modules

(SPMs). The SPMs take the load sharing design to share resources.



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Through the addition of SPMs, the capacity of the BSC6810 can be increased

smoothly with no disruption of ongoing services. The BSC6810 can be configured

with a maximum of 17 SPMs.

2.5 Multiple Clock Sources

Multiple clock sources are available for the BSC6810. Thus, the BSC6810 can select

clock sources flexibly.

The available clock sources are as follows:

Building Integrated Timing Supply System (BITS)

Global Positioning System (GPS)

Line clock extracted from the Iu interface

The BSC6810 can set a priority for each clock source.

2.6 Diverse Transmission Solutions

The BSC6810 provides diverse transmission solutions by supporting:

Multiple Iub Network Topologies

Multiple Types of Transmission Ports

Flexible Configuration of Interface Boards

IP Transport on the Iub/Iur/Iu Interfaces

Hybrid IP Transport on the Iub Interface ATM/IP Dual Stack on the Iub Interface

Satellite Transmission on the Iub Interface

IMA

Fractional Functions

Timeslot Cross Connection

MLPPP

2.6.1 Multiple Iub Network Topologies

The BSC6810 supports multiple Iub network topologies, such as star, chain, and tree.

2.6.2 Multiple Types of Transmission Ports

The BSC6810 provides multiple types of physical transmission ports for the Iub, Iur,

and Iu interfaces.

The Asynchronous Transfer Mode (ATM) transmission ports are of the following

types:

E1/T1

Unchannelized STM-1/OC-3c



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Channelized STM-1/OC-3

The IP transmission ports are of the following types:

E1/T1

Fast Ethernet (FE)

GE

2.6.3 Flexible Configuration of Interface Boards

The BSC6810 does not place restrictions on which slots hold interface boards for the

Iub, Iur, or Iu respectively. A subrack can host different types of ATM and IP interface

boards at the same time.

2.6.4 IP Transport on the Iub/Iur/Iu Interfaces

In addition to ATM transport, the BSC6810 supports IP transport on the Iub, Iur, and Iu

interfaces. This agrees with the evolution to an all-IP network, provides sufficient

bandwidth for high-speed and large-volume data services, and reduces the cost of

construction, operation, and maintenance of transport networks.

2.6.5 Hybrid IP Transport on the Iub Interface

When IP transport is applied to the Iub interface, data of different priorities can be

transmitted separately through E1/T1 ports and FE ports. The transmission mode of aservice depends on the Quality of Service (QoS) requirement. Services with high QoS

requirements are transmitted through E1/T1 ports, and those with low QoS

requirements are transmitted on the Ethernet. Hybrid IP transport guarantees the

QoS and provides sufficient interface bandwidth for high-speed PS services such as

High Speed Downlink Packet Access (HSDPA) and High Speed Uplink Packet Access

(HSUPA), thus saving the transmission cost.

2.6.6 ATM/IP Dual Stack on the Iub Interface

ATM/IP dual stack is supported between the BSC6810 and a NodeB. Services withhigh QoS requirements are transmitted through ATM, while those with low QoS

requirements through IP. Such data transmission guarantees the QoS and provides

sufficient interface bandwidth for high-speed PS services such as HSDPA and

HSUPA, thus saving the transmission cost.

2.6.7 Satellite Transmission on the Iub Interface

The BSC6810 supports satellite transmission on the Iub interface to cover isolated

areas.



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2.6.8 IMA

The BSC6810 provides the Inverse Multiplexing on ATM (IMA) function over E1/T1

links. An ATM cell stream from a high-speed transport link is multiplexed inversely

onto multiple low-speed E1/T1 links. Then, at the receiver end, the low-speed cell

streams are converged to the original high-speed cell stream.

The IMA function enables high-speed transmission through low-speed links. Thus, it

broadens the application scope of E1/T1 links. In addition, this function has a

relatively high fault tolerance. Provided that the number of working links is not smaller

than the specified minimum number of active links in the IMA group, services can

continue. Thus, the IMA function ensures high transmission reliability.

2.6.9 Fractional Functions

The BSC6810 provides the fractional functions, that is, fractional ATM and fractional

IMA. The fractional functions enable the 3G equipment to share the E1/T1 links of a

2G network, thus allowing 2G and 3G concurrent transmission.

With the fractional functions, you can deploy NodeBs at an early stage of WCDMA

network construction by using the existing 2G transmission resources. Thus, you can

launch the system at a comparatively low cost and within a relatively short period of

time.

2.6.10 Timeslot Cross Connection

The BSC6810 supports the timeslot cross connection function without support from

any special device.

2.6.11 MLPPP

The BSC6810 provides the Multilink PPP (MLPPP) function. This function combines

physically independent links to form only one logical channel. Thus, the network layer

can send data directly to this logical channel. The MLPPP function provides a

relatively high bandwidth and implements rapid data transfer.

2.7 Advanced RRM Algorithms

The BSC6810 uses Huawei-patented Radio Resource Management (RRM)

algorithms in the following functions:

Power control

Handover

Radio resource allocation

Call Admission Control (CAC)



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Load control

In addition, the BSC6810 applies these algorithms in new features such as HSDPA,

HSUPA, and Multimedia Broadcast and Multicast Service (MBMS). Thus, theBSC6810 offers optimum network coverage, capacity, and quality.

2.7.1 Power Control

The BSC6810 uses Huawei-patented outer loop power control algorithms. It aims to

provide the required quality for the UE when the radio environment changes and to

increase the usage of system capacity.

2.7.2 Handover

The BSC6810 supports flexible handover strategies and parameter configurations.

Based on different coverage areas, services and loads, it performs different kinds of

handovers, such as intra-frequency handover, inter-frequency handover, and inter-

RAT handover. Thus, it improves the speech quality, reduces the call drop rate, and

implements traffic absorption in special areas.

2.7.3 Radio Resource Allocation

Based on the QoS requirements, actual traffic volume, and actual cell load, the

BSC6810 can allocate resources dynamically. Thus, it fulfills the communication

requirements and increases the efficiency of radio channel resources.

2.7.4 CAC and Load Control

The BSC6810 applies multiple Huawei-patented technologies, such as load sharing

and admission based on rate downsizing, to balance loads between cells and to

control service access. Thus, it increases the system capacity and guarantees the

current QoS.

2.8 Advanced Solutions to Radio Data Services

The BSC6810 adopts the advanced technologies, such as HSDPA, HSUPA, and

MBMS, to meet the requirements of different types of data services.

2.8.1 HSDPA

The BSC6810 adopts the HSDPA technology as the solution to high-speed downlink

data transmission. The downlink rate for a single user can reach a maximum of 7.2

Mbit/s on the MAC sublayer.



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2.8.2 HSUPA

The BSC6810 adopts the HSUPA technology as the solution to high-speed uplink

data transmission. The uplink rate for a single user can reach a maximum of 1.44

Mbit/s on the MAC sublayer.

2.8.3 MBMS

The BSC6810 adopts the MBMS technology to provide broadcast of high-speed

multimedia services. The transmission rate of the MBMS services can reach a

maximum of 256 kbit/s.

2.9 High Compatibility of Protocols

The BSC6810 is developed according to 3GPP R6 specifications. It is compatible with

other Network Elements (NEs) and UEs based on 3GPP R6, R5, R4, or R99

specifications.



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Chapter 3 System Architecture



Physical Structure

Logical Structure

Hardware Configuration

3.2 Physical Structure

3.2.1 Cabinet Appearance

The BSC6810 uses the standard N68-22 cabinet of Huawei. The design complies

with the IEC60297 and IEEE standards. Figure 1 shows the cabinet.

Figure 1 BSC6810 cabinet



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3.2.2 Cabinet Components

The BSC6810 has the following two types of cabinets:

RNC Switch Rack (RSR)

RNC Business Rack (RBR)

Figure 1 shows the components of the cabinets.

RBS

RSR RBR

RBS

RBS

RBS

Power distribution box Power distribution box

RSS

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Figure 1 Components of the BSC6810 cabinets



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Note:The RINT refers to the interface boards of the BSC6810. There is no physical RINT.

I. RSR

The RSR provides the single-cabinet solution.

The RSR has the following components:

One RNC Switching Subrack (RSS)

Zero to two RNC Business Subracks (RBSs)

II. RBR

The RBR is configured when the required service processing capability exceeds the

specifications for the RSR. At most one RBR can be configured.

The RBR is configured with only RBSs. The number of RBSs in the RBR ranges from

1 to 3. If the RBR is configured with one or two RBSs, the RBSs should be configured

from the bottom to the top.

3.2.3 Subrack Components

The BSC6810 has two types of subracks according to board configuration. They are

the RSS and the RBS. The BSC6810 can be configured with up to six subracks.

Among the subracks, one is the RSS, and the others are RBSs. The number of RBSs

ranges from 0 to 5.

The subracks of the BSC6810 have a standard width of 19 inches, which complies

with the IEC60297 standard. The height of a single subrack is 12 U. In a subrack, the

backplane is positioned in the middle, and front and rear boards are installed on both

sides of the backplane, as shown in Figure 1. The slots are of the same length.



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A

C

B

0 13

14 27

6

20

A: front boards B: backplane C: rear boards

Figure 1 Subrack of the BSC6810

Each subrack of the BSC6810 provides a total of 28 slots. The 14 slots on the front

side of the backplane are numbered from 0 to 13, and those on the rear side from 14

to 27.

On each plane from leftmost to rightmost, every two even- and odd-numbered

neighboring slots have an active/standby relationship. For example, slots 0 and 1 are

active/standby slots. The same is true of slots 2 and 3. Boards that work in

active/standby mode must be installed in active/standby slots.

3.2.4 RSS Subrack

The mandatory RSS is configured in the RSR. The RSS is the central switching

subrack of the BSC6810. This subrack has the following functions:

Connecting to each RBS and transferring data between RBSs through data

switching on the MAC sublayer Performing centralized processing on MBMS user plane data

Providing system timing signals

Providing the same service processing function as the RBS

Providing transmission of physical layer data for the Iub, Iur, and Iu interfaces



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Figure 1 shows the boards in the RSS.

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1311975310 2 4 6 8 10 12

2725232119171514 16 18 20 22 24

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Figure 1 Boards in the RSS

The RSS provides 28 slots. Table 1.1 describes the boards in the RSS.

Table 1.1 Boards in the RSS

Board Full Spelling Function Configuration

CSUa RNC CommonService Processing

Unit REV:a

Performing centralizedprocessing on MBMS user plane

data

Two CSUa boardsare permanently

configured in slots 0

and 1.

DPUb RNC Data

Processing Unit

REV:b

Processing and distributing

service data on the user plane

Slots 811 are

available for the DPUb

boards.

GCUa RNC General

Clock Unit REV:a

Performing phase-lock and

retaining on the system clock

Generating RFN signals for

the RNC

Two GCUa boards

are permanently


and 13.

GCGa RNC General

Clock with GPS

Card REV:a

Having all the functions of the

GCUa; in addition, receiving and

processing GPS signals

Two GCGa boards

are permanently


and 13.



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OMUa RNC Operation

and Maintenance

Unit REV:a

Performing configuration

management, performance

management, fault detection,

security management, loading

management, and so on

Working as the Operation and

Maintenance (OM) agent of

the M2000 and Local

Maintenance Terminals

(LMTs) to provide the

BSC6810 OM interface for the

M2000 and LMTs and to

control communication

between the BSC6810 and the

M2000/LMTs

One OMUa is

permanently configured

in slots 24 and 25, and

the other in slots 26

and 27.

SCUa RNC GE Switching

and Control Unit

REV:a

Providing MAC switching, and

enabling convergence of ATM

and IP networks

Providing 59 Gbit/s switching

capacity Providing the port trunking

function

Enabling inter-subrack

connections

Providing configuration and

maintenance of a subrack or of

the whole RNC

Distributing timing signals and

RFN signals for the RNC

Two SCUa boards are

permanently configured

in slots 6 and 7.



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SPUa RNC Signaling

Processing Unit

REV:a

Processing high-layer

signaling of the Uu, Iu, Iur, and

Iub interfaces

Processing transport layer

signaling

Allocating and managing

various resources necessary

to service setup, and

establishing signaling and

service connections

Providing 4 independent

processor systems

Processing RNC Frame

Number (RFN) signals

Slots 25 are available

for the SPUa boards.

RINT AEUa RNC 32-port ATM

over E1/T1/J1

Interface Unit

REV:a

Providing 32 E1s/T1s

Providing ATM over E1/T1

Providing the IMA and UNI

functions

Providing the fractional ATM

and fractional IMA functions

Providing the timeslot cross

connection function

Providing ATM Adaptation

Layer 2 (AAL2) switching

Extracting the clock from

E1/T1 links, outputting 2 MHz

signals, and sending the 2

MHz timing signals to the

GCUa/GCGa

Slots 1423 are

available for the

AEUa boards.



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AOUa RNC 2-port ATM

over Channlized

Optical STM-1/OC-

3 Interface Unit

REV:a

Providing 2 STM-1/OC-3

optical ports

Providing 126 E1s or 168 T1s

Providing ATM over E1/T1

over SDH

Providing the IMA and UNI

functions

Providing 84 IMA groups, each

of which contains 32 E1s/T1s

Providing AAL2 switching

Receiving timing signals from

upper-level equipment and

sending them to the

GCUa/GCGa

Providing timing signals for

NodeBs

Slots 1423 are

available for the

AOUa boards.

UOIa RNC 4-port

ATM/Packet over

UnchannlizedOptical STM-1/OC-

3c Interface Unit

REV:a

Providing 4 STM-1/OC-3c

optical ports

Providing ATM over SDH Receiving timing signals from


sending them to the

GCUa/GCGa


NodeBs

Slots 1423 are

available for the

UOIa boards.



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PEUa RNC 32-port

Packet over

E1/T1/J1 Interface

Unit REV:a

Providing 32 E1s/T1s

Providing IP over PPP/MLPPP

over E1/T1

Providing 256 PPP links or 64

MLPPP groups, each MLPPP

group containing 32 MLPPP

links

Providing the timeslot cross

connection function

Receiving timing signals from


sending them to the

GCUa/GCGa


NodeBs

Slots 1423 are

available for the

PEUa boards.

FG2a RNC Packet over

Electrical 8-port FE

or 2-port GE

Ethernet Interface

Unit REV:a

Providing 8 FE ports or 2 GE

electrical ports

Providing IP over FE or IP

over GE

Slots 1423 are

available for the

FG2a boards.

GOUa RNC 2-port Packet

over Optical GE

Ethernet Interface

Unit REV:a

Providing 2 GE optical ports

Providing IP over GE

Slots 1423 are

available for the

GOUa boards.

Note:

The RSS can be configured with one or two OMUa boards. In the latter case, the twoboards work in active/standby mode.

3.2.5 RBS Subrack

The optional RBS is configured in the RSR or RBR. An RBS is a basic service

processing subrack of the BSC6810. Working as the extension subrack of the RSS,

the RBS is used to extend the service processing capability of the BSC6810. This

subrack has the following functions:



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Processing signaling on the control plane

Processing and distributing service data on the user plane

Providing physical transmission on the Iub, Iur, and Iu interfacesFigure 1 shows the boards in the RBS.

1311975310 2 4 6 8 10 12

2725232119171514 16 18 20 22 24 26

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Figure 1 Boards in the RBS

The RBS provides 28 slots. The RBS holds all types of boards in the RSS except the

CSUa, GCUa/GCGa, and OMUa.

Note:In an RBS, slots 0 and 1 in the RBS are configured with SPUa boards, slots 12 and

13 with DPUb boards, and slots 2427 with RINTs.

3.3 Logical Structure

The BSC6810 consists of the following functional modules:

Internal Switching Module

User Plane Data Processing Module

Control Plane Data Processing Module

Clock Module

Transmission Interface Module

OM Module



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3.3.1 Internal Switching Module

The internal switching module is implemented mainly by the SCUa. The SCUa in the

RSS performs first-level switching and that in the RBS performs second-level

switching. Thus, the BSC6810 provides internal MAC switching at two levels. The

two-level switching enables full connection between all modules of the BSC6810.

3.3.2 User Plane Data Processing Module

The user plane data processing module is implemented mainly by the DPUb and

CSUa. This module performs protocol processing at each layer on the user plane

data for the RNC.

The CSUa performs the following protocol processing on MBMS services: Packet Data Convergence Protocol (PDCP)

Radio Link Control (RLC)

The DPUb performs the following protocol processing on other services:

Frame Protocol (FP)

Macro Diversity Combining (MDC)

MAC

RLC

PDCP

Iu User Plane (Iu UP) protocols

The DPUb is configured in both the RSS and the RBS. The CSUa is configured only

in the RSS.

3.3.3 Control Plane Data Processing Module

The control plane data processing module is implemented mainly by the SPUa. This

module processes control plane signaling on each interface for the RNC. The

processed messages are of the following types:

Radio Access Network Application Part (RANAP)

NodeB Application Part (NBAP)

Radio Network Subsystem Application Part (RNSAP)

Radio Resource Control (RRC)

Service Area Broadcast Protocol (SABP)

The SPUa is configured in both the RSS and the RBS.

3.3.4 Clock Module

The clock module is implemented mainly by the GCUa/GCGa and the clock



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processing units of other boards. This module provides the clock for the operation of

the RNC, generates RFN signals, and provides NodeBs with timing signals.

The GCUa/GCGa is configured only in the RSS. If the RNC requires GPS signals, theGCGa must be configured.

3.3.5 Transmission Interface Module

The transmission interface module is implemented mainly by the AEUa, AOUa, UOIa,

PEUa, FG2a, or GOUa. This module provides the transmission interface between the

BSC6810 and other NEs. In addition, it performs related protocol processing on the

transport network layer. For ATM transport, the AAL2 and ATM Adaptation Layer 5

(AAL5) are terminated at the transmission interface module. For IP transport, this

module processes User Data Protocol (UDP) and IP messages and forwards IP

messages on the control plane.

3.3.6 OM Module

The OM module is implemented mainly by the LMT, Back Administration Module

(BAM), and related modules of host boards. This module performs operation and

maintenance of the BSC6810.

3.4 Hardware Configuration

The BSC6810 adopts the modular design based on the SPM. An SPM consists of two

SPUa boards and two DPUb boards. The two SPUa boards work in 1:1 redundancy

mode, and the two DPUb boards work as a resource pool. Through the addition of

SPMs, the capacity of the BSC6810 can be increased smoothly with no interruption of

ongoing services. The RSS can be configured with up to two SPMs, and an RBS can

be configured with up to three SPMs. The BSC6810 can be configured with up to 17

SPMs.

3.4.1 Minimum Configuration

Figure 1 shows the minimum configuration of the BSC6810. In this configuration, the

BSC6810 needs only one RSR that has only the RSS. The minimum configuration

applies to an early stage of construction of a commercial network.



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RSS

Cabinet 1

Empty

Empty

Figure 1 Minimum configuration of the BSC6810

The maximum capacity of the BSC6810 in minimum configuration is as follows:

6,000 Erlang voice traffic or 384 Mbit/s (UL + DL) PS data capacity

200 NodeBs

600 cells

3.4.2 Maximum Configuration

Figure 1 shows the maximum configuration of the BSC6810. In this configuration, the

BSC6810 needs two cabinets, that is, one RSR and one RBR. You can add RBSs toexpand the system capacity smoothly.

RBS

Cabinet 2

RBS

RBS

RSS

Cabinet 1

RBS

RBS

Figure 1 Maximum configuration of the BSC6810

The maximum capacity of the BSC6810 in maximum configuration is as follows:

51,000 Erlang voice traffic or 3,264 Mbit/s (UL + DL) PS data capacity

1,700 NodeBs

5,100 cells



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3.4.3 Typical Configurations

Table 1.1 shows the typical configurations of the BSC6810. You can choose a typical

configuration as required.

Table 1.1 Typical configurations of the BSC6810

Number of

Subracks

Number

of SPMs

BHCA Voice

Traffic

(Erlang)

PS (UL + DL)

Data Capacity

(Mbit/s)

Number

of

NodeBs

Number

of Cells

1 RSS 2 160,000 6,000 384 200 600

1 RSS+ 1 RBS 5 400,000 15,000 960 500 1,500

1 RSS+ 2 RBSs 8 640,000 24,000 1,536 800 2,400

1 RSS+ 3 RBSs 11 880,000 33,000 2,112 1,100 3,300

1 RSS+ 4 RBSs 14 1,120,000 42,000 2,688 1,400 4,200

1 RSS+ 5 RBSs 17 1,360,000 51,000 3,264 1,700 5,100

Note:

BHCA: Busy Hour Call Attempt

Note:The values of BHCA and voice traffic are calculated based on Huawei traffic model.



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Chapter 4 Operation and Maintenance



OM Structure

OM Functions

4.2 OM Structure

Figure 1 shows the OM system of the BSC6810. The system consists of the Front

Administration Module (FAM), BAM, OM terminals and alarm box. These components

are described as follows:

The FAM consists of the boards in the RSS and RBSs. It is the OM object entity.

The physical entity of the BAM is the OMUa boards in the RSS. The BAM

collects and processes OM information and sends the information to LMTs and

the iManager M2000.

The LMTs are OM terminals of the BSC6810. The iManager M2000 is a

centralized OM system.

The alarm box provides audible and visible alarms.



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VLAN

BAM

iManager M2000

LMTLMT

FAM

OM system of the BSC6810

Alarm box

VLAN

IP

BAM: Back Administration Module FAM: Front Administration Module

LMT: Local Maintenance Terminal IP: Internet Protocol

VLAN: Virtual Local Area Network

Figure 1 OM system of the BSC6810

The LMT is the OM terminal on the NE side. It accesses the BAM through Virtual

Local Area Network (VLAN), intranet, Internet, or modem.

The LMT is an intelligent Man Machine Language (MML) client working in GUI mode.

It provides the BSC6810 with the following functions:

Security management

Configuration management

Maintenance management

Fault detection

Performance management

Alarm management

Loading management

Status monitoring

Message tracing

Log management

Software management



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Through an external alarm box, the LMT can provide audible and visible alarms if

faults occur.

4.3 OM Functions

The BSC6810 provides MML commands and GUIs as an interface for system

management, configuration, maintenance, alarm management, and so on. Such an

interface is explicit and easy to use. In addition, the BSC6810 can check the data

integrity of an MML command to be run.

This section describes the following OM functions:

Security Management

Configuration Management

Maintenance Management

Fault Detection

Performance Management

Alarm Management

Loading Management

Status Monitoring

Message Tracing

Log Management

Software Management

4.3.1 Security Management

BSC6810 security management provides the following functions:

Grade-based operator right setting

You can set the operator right, operation time limit, and password to ensure

system security and operation flexibility.

Operator information protection

If no operation is performed during a certain period, the user interface is

automatically locked.

4.3.2 Configuration Management

The BSC6810 provides certain functions for configuration management. These

functions are described in the following parts.

I. Automatic Data Configuration

The BSC6810 can automatically generate the configuration data that is necessary for

internal physical and logical connections and configure the data for the corresponding



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parts. No manual configuration is required. You need to configure only the data for

connections between the BSC6810 and external devices, thus improving the

serviceability of the BSC6810.

II. Online and Offline Data Configuration

The BSC6810 supports the following configuration modes:

Offline data configuration

Configuration data is stored only in the BAM. The data is not sent to the host

before being loaded to the host. Therefore, this mode increases the efficiency of

configuring a large amount of data. The BSC6810 also supports offline data

configuration based on host subracks. Therefore, it allows capacity expansion

without interrupting services. Online data configuration

Configuration data is sent to the host immediately after the configuration. There

is no need to reset the BSC6810 or to reload the data. Thus, dynamic data

configuration is enabled.

III. Dynamic Batch Data Configuration

The BSC6810 supports dynamic configuration of data in batches. With this function,

the batch data configuration scripts are executed when the BSC6810 is offline. After

the BSC6810 switches to online mode, the BAM sends all the configuration data tothe host in batches. The data takes effect with no need of restarting or resetting the

subracks or boards. This avoids interrupting the ongoing services. In the case of bulk

data modification, such as NodeB reparent and change of interface board types,

dynamic batch data configuration improves efficiency.

IV. Data Configuration Right Control

Under data configuration right control, only one user has the right to perform data

configuration for the BSC6810 at any time. The configuration is allowed on only one

configuration console at a time, that is, either on the LMT or on the M2000.

With the control, data configuration on the LMT and that on the M2000 are not

allowed at the same time, thus improving the reliability of the BSC6810.

V. Data Configuration Rollback

The BSC6810 provides the data configuration rollback function. If data configuration

fails to achieve the expectation or even causes equipment or network exceptions, you

can perform rollback to restore the configurations soon for the proper running of the

BSC6810.



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VI. Data Backup

When two OMUa boards are configured, they work in active/standby mode. The

BSC6810 synchronizes the data on the standby OMUa with that on the active OMUa.

The BSC6810 supports automatic and manual data backup. It provides a data backup

and recovery tool.

VII. Data Validity Check

The BSC6810 can check the integrity and consistency of configuration data, such as

the data of a cell.

VIII. Configuration Data Query

The BSC6810 supports the object-based query of configuration data.

IX. Online Reconfiguration of the RINT and Redundancy Mode

The BSC6810 supports online reconfiguration of the RINT and of the board and port

redundancy mode, thus facilitating reconfiguration of services.

X. Automatic Assignment of IP Addresses to a NodeB

When ATM transport is applied to the Iub interface, the BSC6810 can use the

Bootstrap Protocol (BOOTP) to automatically assign the OM IP address to a NodeB.

When IP transport is applied to the Iub interface, the BSC6810 can use the Dynamic

Host Configuration Protocol (DHCP) to automatically assign the OM IP address to the

NodeB.

Compared with the BOOTP protocol, the DHCP protocol has relatively powerful

functions. In addition, the DHCP protocol is compatible with the BOOTP protocol.

XI. Network Parameter Setting

The radio network parameters of the BSC6810 are of two types: RNC-oriented and

cell-oriented. They can adapt to different radio environments.

4.3.3 Maintenance Management

The BSC6810 provides certain functions for maintenance management. These

functions are described in the following parts.

I. Board Maintenance

The BSC6810 supports the following board maintenance functions:

Resets on different levels, including equipment reset, subrack reset, board reset,

and subsystem reset



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Query of board reset causes

Hot swap

Setting of boards to the out-of-service state for troubleshooting Query of board status and version information

Board self-detection and board diagnosis test

Query of the Central Processing Unit (CPU) usage of a board subsystem

Forced active/standby board switchover initiated on the LMT

II. Object Status Query

The BSC6810 supports the query of the status of certain objects, the reasons for

status changes, and the time of status changes. The objects are as follows:

Equipment objects, such as boards, subsystems, digital signal processors,

clocks, optical ports, and BAM

Physical transmission resource objects, such as E1/T1 links, IMA links, and UNI

links

IP transport links, such as PPP links and MLPPP links

Logical transmission resource objects, such as Signaling ATM Adaptation Layer

(SAAL) links, Stream Control Transmission Protocol (SCTP) links, Message

Transfer Part level 3 - Broadband (MTP3-B) links, AAL2 paths, IP paths, NodeB

Control Ports (NCPs), and Communication Control Ports (CCPs)

Radio resource objects, such as cells and channels

III. Panel Emulation

The emulated panel on the LMT interface can display the status of Light Emitting

Diodes (LEDs) on boards, external physical ports, and digital signal processors.

IV. Forced Handover

Using a forced handover command, the BSC6810 can hand over all the services from

one cell to another without call drops.

V. Physical Link Maintenance

The BSC6810 supports the status query and loopback test of physical links.



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VI. Logical Link Maintenance

The BSC6810 supports the following logical link maintenance functions:

Status query, activation, and deactivation of Signaling System No. 7 (SS7)

signaling links

Status query of SAAL links

Status query, blocking, unblocking, and reset of AAL2 traffic channels

Status query of IMA groups, UNI links, and IMA links

Loopback test function

VII. SS7 Signaling Point Maintenance

The BSC6810 supports maintenance of SS7 signaling points. The maintenance

includes query, inhibit and uninhibit of Destination Signaling Points (DSPs).

VIII. Out-of-Service NodeB Measurement

If a NodeB is out of service, it is unavailable.

The BSC6810 supports the measurement of out-of-service duration and out-of-

service ratio. The measurement results can be used to analyze the general serving

status of NodeBs.

IX. NodeB Blocking and Unblocking

The BSC6810 can block a NodeB by deactivating all of the cells controlled by thisNodeB. The BSC6810 can also unblock a NodeB by activating all of the cells

controlled by this NodeB.

X. VIP Cell and NodeB Guarantee

The BSC6810 can provide OM guarantee and service guarantee for VIP cells and

NodeBs. Thus, the VIP cells and NodeBs can run stably with high quality of service.

OM guarantee means monitoring VIP cells and NodeBs through detailed monitoring

items on a specific interface, so that the maintenance engineers can identify faults

rapidly and rectify them efficiently.

Service guarantee means providing special network planning and configuration for

VIP cells and NodeBs, so that they can provide better services. The resources shared

between VIP cells, VIP NodeBs, common cells, and common NodeBs are offered

preferentially to VIP cells and VIP NodeBs.

XI. Remote Maintenance

The BSC6810 supports remote maintenance by allowing remote access through the

Internet or Virtual Private Network (VPN).



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XII. Provision of OM Channels for the NodeB

The BSC6810 provides the following OM channels for the NodeB:

Transparent OM channels, through which you can operate and maintain the

NodeB on the BSC6810 LMT or on the M2000

Reverse OM channels, through which you can operate and maintain other

NodeBs on the local NodeB

4.3.4 Fault Detection

The BSC6810 provides physical layer fault detection, data link layer fault detection,

and other fault detection.

Physical layer fault detection covers the following aspects: Local E1 loopback test

Remote E1 loopback test

E1 Bit Error Rate (BER) test

E1 loopback detection

E1 misconnection test

SDH loopback detection

Data link layer fault detection covers the following aspects:

AAL2 path fault detection

IP path fault detection SAAL fault detection

SCTP fault detection

PPP/MLPPP misconnection test

NodeB OM IP over ATM (IPoA) fault detection

Iu-PS IPoA fault detection

Other fault detection covers the following aspects:

Inter-Process Communication (IPC) connectivity detection

Cell common channel fault detection

RFN fault detection Clock fault detection

Board loading control fault detection

4.3.5 Performance Management

The BSC6810 provides various performance counters for the upper-layer network

management system to facilitate performance analysis and network optimization.

By default, the BSC6810 supports two measurement periods. One is the normal

period whose duration is 30 minutes, and the other is the short period whose duration



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is five minutes. The latter is used to monitor Key Performance Indicators (KPIs) in real

time.

Through the measurement control switch, you can select a measurement period. Ameasurement item supports both measurement periods, that is, a measurement item

can be included in both normal-period task and short-period task.

You can register various performance measurement tasks on the M2000. The

BSC6810 can store measurement results generated in the past 72 hours.

4.3.6 Alarm Management

The BSC6810 provides advanced fault diagnosis and handling methods, performs

relevance analysis of alarms raised from the host, and reports valid alarms to the

user.

The BSC6810 provides certain functions for alarm management. These functions are

described in the following parts.

I. Alarm Processing

You can browse alarm information in real time, query history alarm information, and

store alarm information. The online help provides detailed troubleshooting methods

for each alarm.

The BSC6810 can store the history alarm information generated in the past 90 days

and at most 100,000 alarms.

II. Alarm Masking

The BSC6810 allows you to mask derived alarms to reduce the number of reported

alarms.

III. Alarm Filtering

The BSC6810 can filter the alarms of a specific object. If an object is filtered, the

alarms of this object are not sent to the alarm management system.

IV. Alarm Indication

When a fault alarm occurs, the BSC6810 can notify you in the following ways:

Blinking of the icon

Audible indication of the terminal

Audible and visible indications of the alarm box

V. Classified Alarm Management

The BSC6810 supports classified management of alarms raised from normal cells

and NodeBs and from others. The latter can be either cells and NodeBs that are



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under commissioning or cells and NodeBs that are not put into use.

4.3.7 Loading Management

The following two modes are available for loading program files and data files onto

boards of the BSC6810:

Loading from the flash memory of the boards

Loading from the BAM

The mode of loading program files and data files onto a board depends on the

consistency between the files in the flash memory of the board and those in the BAM.

If they are consistent, the board loads the files from its flash memory. If they are

inconsistent, the board loads the files from the BAM and updates the files in the flash

memory of the primary workspace on the board, so as to ensure the program and

data consistency.

4.3.8 Status Monitoring

The BSC6810 can monitor the system status in real time, including CPU usage, cell

performance, connection performance, link performance, and board resources.

The BSC6810 can monitor cell performance as follows:

Pilot transmit (TX) power of the Primary Common Pilot Channel (P-CPICH)

Uplink (UL) Received Total Wideband Power (RTWP) Downlink (DL) frequency TX power

Number of UEs, including UEs on Dedicated Channels (DCHs), UEs on common

channels, HSDPA UEs, and HSUPA UEs

Node synchronization

UL CAC

DL CAC

UL equivalent number of users

DL equivalent number of users

Usage of the code tree

Minimum High Speed Downlink Shared Channel (HS-DSCH) power requirement

Bit rate provided by the HS-DSCH

Bit rate provided by the Enhanced Dedicated Channel (E-DCH)

The BSC6810 can monitor connection performance as follows:

Signal-to-noise ratio and receive (RX) signal code power of a cell

Measurement value of Signal-to-Interference Ratio (SIR) of a UL radio link set

SIR target of a UL radio link set

SIR error value of a UL radio link set

Block Error Rate (BLER) of a UL transport channel



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BLER of a DL transport channel

DL code TX power

UE TX power BER of a UL physical channel

UL traffic volume

DL traffic volume

UL throughput and bandwidth

DL throughput and bandwidth

Handover delay

Adaptive Multi Rate (AMR) mode

The BSC6810 can monitor performance of the following links:

IMA groups UNI links

Fractional ATM links

SAAL links

IPoA Permanent Virtual Channels (PVCs)

AAL2 paths

FE/GE traffic

Traffic on PPP links

Traffic on MLPPP links

Traffic on SCTP links

The BSC6810 can monitor the board resource, that is, the license.

4.3.9 Message Tracing

The BSC6810 can perform the following types of message tracing:

Message tracing on standard interfaces

Message tracing on the transport network layer

UE message tracing

Cell message tracing

Intra-system inter-module message tracing Message tracing on the serial port after redirection

Call Data Tracing (CDT)

Positioning message tracing

The function of message tracing is integrated in the LMT, which facilitates problem

location. The BSC6810 also provides a tool named Trace Viewer, which allows you to

view the stored messages.



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4.3.10 Log Management

Various logs are available for you to know the running of the BSC6810 and to

troubleshoot faults.

The BSC6810 provides the following logs:

Operation log: records the operation information of operators in real time.

Running log: records the running information of the BSC6810 in real time.

Subscriber log: records the calling procedure information, which is output to the

BAM for problem location in case of calling failure.

Cell log: records the cell procedure information, which is output to the BAM for

problem location in case of cell abnormality.

4.3.11 Software Management

The BSC6810 provides certain functions for software management. These functions

are described in the following parts.

I. Online Patching

The BSC6810 supports online patching. Especially, the BSC6810 supports online

patching without interrupting ongoing services.

Patches are provided in patch packages. The BSC6810 supports totally and, in some

cases, partially one-push solution to facilitate the upgrade. In addition, it supportsversion rollback, which guarantees the stability of the system.

II. Remote Upgrade

The BSC6810 supports remote upgrade. You can upgrade it on a remote terminal. In

addition, the BSC6810 provides automatic upgrade tools, which can reduce human

interference and errors.

III. Remote BAM Patching

The BSC6810 supports remote BAM patching. You can perform the following

operations on a remote terminal:

Patching the BAM

The patches include Windows operating system patches of hotfix type and BAM

software patches.

Querying all the patches on the BAM through MML commands

IV. Online Expansion

The BSC6810 supports online addition of RBSs or service processing boards to

expand the capacity without interrupting ongoing services. After startup, the board



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can automatically load programs, obtain intra-system connection data and

configuration data, and enter the serving state.

V. Batch Command Processing

The BSC6810 supports the editing and modification of commands in batches.

VI. Scheduled Task Processing

The BSC6810 supports scheduled tasks. You can preset commands in the system.

The system will automatically run the commands at the preset time.

VII. Online Help

The BSC6810 provides the GUI-based online help.



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Chapter 5 Reliability



System Reliability

Hardware Reliability

Software Reliability

5.2 System Reliability

The system reliability design of the BSC6810 takes into account the following

measures:

Load control

The system performs load control based on the CPU usage, traffic over each

interface, and radio resource load of the system. In this way, the system

reliability is ensured in the case of CPU overload and resource congestion.

Port trunking

SCUa boards support port trunking. This function allows data backup in case of

link failure, thus preventing inter-plane switchover and cascading switchover and

improving the reliability of intra-system communication.

Dual plane for timing signal transmission

The BSC6810 provides the dual plane for transmission of timing signals between

the GCUa/GCGa and SCUa boards. The active and standby GCUa/GCGa

boards are connected to the active and standby SCUa boards through the Y-

shaped cables. This connection mode ensures proper working of the timing

signals for the system if a single-point failure occurs to the GCUa/GCGa, cable,

or SCUa. In addition, with the Y-shaped cable, switchover of GCUa/GCGa

boards does not affect the SCUa.

Transmission port redundancy

Unchannelized optical ports support Multiplex Section Protection (MSP) 1:1

or MSP 1+1 port redundancy.

Channelized optical ports support MSP 1:1 port redundancy.

FE or GE ports support port redundancy and load sharing between the ports.

All these improve the reliability of transmission.

OM dual plane



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To improve the reliability of OM channels, the BSC6810 provides the OM dual

plane, including dual OMUa boards, dual Ethernet adapters, and dual main

control boards. Crystal Aging Compensation technology

The BSC6810 adopts the Huawei-patented Crystal Aging Compensation

technology to compensate for frequency deviation caused by the aging of

temperature-constant crystal oscillators. This technology protects the clock

precision from the influence of the aging of the crystal oscillators and ensures

long-term stability and reliability of the system clock.

Dual 48V power supply

The two independent 48 V power supplies operate at the same time to ensure

normal operations in case that either of them fails. The failed supply can berestored without a power cut. This improves the reliability and availability of the

power system.

5.3 Hardware Reliability

The BSC6810 adopts the reliability design such as board and port redundancy and

load sharing. In addition, it improves the reliability and maintainability by optimizing

the fault detection and isolation techniques for boards and the whole system. The

hardware reliability design of the BSC6810 takes into account the following

measures:

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

Several CPUs form a cluster processing system. Each module has distinct

functions. The communication channels between modules are of the redundancy

design or anti-suspension/breakdown design.

The system uses the redundancy design, as shown in Table 1.1, to support hot

swap of boards and redundancy of important modules. Therefore, the system

has great error tolerance.

Table 1.1 Part redundancy

Part Redundancy Mode

CSUa Board redundancy

GCUa/GCGa Board redundancy

SCUa Board redundancy + Port trunking on GE ports

SPUa Board redundancy

AEUa Board redundancy



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Part Redundancy Mode

AOUa Board redundancy + MSP 1:1 optical port redundancy

PEUa Board redundancy

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

redundancy

FG2a Board redundancy

GOUa Board redundancy

FG2a/GOUa GE port Port redundancy or load sharing

FG2a FE port Port redundancy or load sharing

OMUa Board redundancy

When an entity fails, the isolation mechanism transfers the services to another

entity for processing. After the system finds a faulty board in the resource pool, it

isolates the board. Then another board in the resource pool will process the

subsequent services.

When a board with a single function fails, restarting the system might clear the

fault.

The Watchdog Timer (WDT) module on each board supports leveled reset, that

is, the key chip, the satellite signal receiving card, a sub-board or port can be

reset separately.

The system uses the non-volatile memory to store important data.

With advanced integrated circuits such as Application Specific Integrated Circuits

(ASICs), the system features high integration, good technology, and high

reliability. For example, all the network chips in the boards use ASICs designed

by Huawei. These ASICs provide internal fault detection and reporting on the

chip level.

All the parts of the system pass the aging test. The process of hardware

assembly is strictly controlled. These methods ensure the high stability and

reliability for long-term operation.

5.4 Software Reliability

The error tolerance ability of the software system indicates the software reliability. In

other words, the whole system can keep on working in case of software failure. This

indicates that the system has self-healing ability. The BSC6810 derives this ability



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from the following aspects:

Regular check of important resources

Usage check is provided for various software resources in the system. If a

resource is unavailable because of a software error, the unavailability lasts only a

short time. The reason is that the check mechanism ensures the release of this

resource and the output of logs and alarms.

Task monitoring

During the running of software, the BSC6810 monitors the internal errors of all

software and some hardware faults, if any. It then reports the errors and faults to

the OM system.

Load sharing

The FG2a and GOUa support inter-board load sharing between ports.

The DPUb boards or digital signal processors in an SPM work in resource pool

mode. If a DPUb fails, the services processed by this DPUb are scheduled to

another DPUb for processing. The same is true of a digital signal processor.

Data check

The system is able to perform regular or event-driven check for data consistency

and output the related log records and alarms.

Dual version

The boards of the BSC6810 have active/standby workspaces. The active

workspace stores the current version files, and the standby workspace stores the

version files other than those in the active workspace. Switchover between the

active and standby workspaces can be performed to upgrade or roll back the

RNC version. Therefore, the active and standby workspaces facilitate the

upgrade of and rollback for the RNC and greatly reduce the time of service

interruption caused by the upgrade.

Data backup

The BAM data and FAM data can be backed up, so that the reliability and

consistency of the data are ensured.

Storage of operation log information

The BSC6810 records the operations that you perform and saves them in the

operation log. You can use the operation log to locate and clear errors or

exceptions caused by operations.

Flow control

The BSC6810 automatically controls the flows on the Iub, Iur, and Iu interfaces to

avoid overload due to heavy traffic.



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Chapter 6 Technical Specifications



Performance Specifications

Transmission Port Specifications

GPS Feeder Specifications

Reliability Specifications

Structural Specifications Electrical Specifications

Clock Specifications

Noise and Safety Compliance

Environmental Protection Specifications

International Protection Specifications

Environmental Requirements

6.2 Performance Specifications

Table 1.1 describes the performance specifications for the BSC6810.

Table 1.1 Performance specifications

Item Specification

Maximum number of cabinets 2, that is, 1 RSR and 1 RBR

Maximum number of subracks 6, that is, 1 RSS and 5 RBSs

BHCA 1,360,000 (calculated based on Huawei traffic

model)

Maximum voice traffic 51,000 Erlang (calculated based on Huawei traffic

model)

PS data capacity (UL + DL) 3,264 Mbit/s

Maximum number of NodeBs 1,700

Maximum number of cells 5,100



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6.3 Transmission Port Specifications

Table 1.1 describes the transmission port specifications for the BSC6810.

Table 1.1 Transmission port specifications

Transmission

Type

Standard Board or

Port Type

Connector Remarks

E1/T1 ITU-T

G.703/G.704

AEUa DB44 The AEUa provides 32 E1s/T1s

for ATM transport on the Iub

interface.

PEUa DB44 The PEUa provides 32 E1s/T1s

for IP transport on the Iub

interface.

Channelized

STM-1/OC-3

ITU-T

G.707

ITU-T

I.432.1

ITU-T

I.432.2

AOUa LC/PC The AOUa provides 2 channelized

STM-1/OC-3 optical ports for ATM

transport on the Iub interface.

UnchannelizedSTM-1/OC-3c

ITU-T

G.957

ITU-T

I.432.1

ITU-T

I.432.2

UOIa LC/PC The UOIa provides 4unchannelized STM-1/OC-3c

optical ports for ATM transport on

the Iub, Iur, and Iu interfaces.

FE IEEE 802.3 FE port on

the FG2a

RJ45 The FG2a provides 8 FE ports for

IP transport on the Iub, Iur, and Iu

interfaces.

GE IEEE 802.3 GE

electrical

port on

the FG2a

RJ45 The FG2a provides 2 GE

electrical ports for IP transport on

the Iub, Iur, and Iu interfaces.

GE optical

port on

the GOUa

LC/PC The GOUa provides 2 GE optical

ports for IP transport on the Iub,

Iur, and Iu interfaces.



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Note:The maximum transmission distances of different port types are as follows:

E1/T1 port: 500 m

STM-1 port: 15 km

FE port: 100 m

GE optical port on the GOUa: 15 km

6.4 GPS Feeder Specifications

The BSC6810 provides GPS feeders of the following lengths:

Length of the GPS feeder < 100 m

100 m < length of the GPS feeder < 300 m

300 m < length of the GPS feeder < 500 m

6.5 Reliability Specifications

Table 1.1 describes the reliability specifications for the BSC6810.

Table 1.1 Reliability specifications

Item Specification

System inherent

availability

99.999%

Mean Time Between

Failures (MTBF)

347,700 h

System restarting time 10 min

Mean Time To Repair

(MTTR)

1 h

6.6 Structural Specifications

Table 1.1 describes the structural specifications for the BSC6810.



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Table 1.1 Structural specifications

Item Specification

Cabinet standard The structural design conforms to the IEC60297

standard and IEEE standard.

Cabinet outline dimensions 2,200 mm (height) x 600 mm (width) x 800 mm

(depth)

Available cabinet space height 46 U (1 U = 44.45 mm)

Weight of a single cabinet 350 kg

Load bearing capacity of the

equipment room

450 kg/m2

6.7 Electrical Specifications

Table 1.1 describes the electrical specifications for the BSC6810.

Table 1.1 Electrical specifications

Item Specification

Power supply

specifications

48 V DC power; input voltage range: 40 V to 57 V

Electro Magnetic

Compatibility (EMC)

specifications

Meets the requirements in ETSI EN300 386 V1.3.1

(2001-09)

RSS power consumption 1,800 W

RBS power consumption 1,600 W

Power consumption of the

RSR in full configuration

5,000 W

Power consumption of the

RBR in full configuration

4,800 W

6.8 Clock Specifications

Table 1.1 describes the specifications of minimum clock precision for the BSC6810.



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Table 1.1 Minimum clock precision

Clock Stratum Minimum Clock Precision

Stratum 3 4.6 x 10-6 Hz

Note:Minimum clock precision refers to the maximum offset of the RNC clock frequency

from the RNC reference frequency in the long term.

Table 1.2 describes the specifications of maximum frequency offset for the BSC6810.

Table 1.2 Maximum frequency offset

Clock Stratum Maximum Frequency Offset

Stratum 3 < 5 x 10-8 Hz/day

Note:Maximum frequency offset refers to the maximum unidirectional variation of the RNC

clock frequency after the reference frequency, also called the clock source, is lost.

6.9 Noise and Safety Compliance

Table 1.1 describes the noise and safety compliance for the BSC6810.

Table 1.1 Noise and safety compliance

Item Specification

Noise < 72 dB; conforms to the requirements in

EUROPEAN ETS 300 753.



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Item Specification

Safety Conforms to the requirements in:

IEC 60950-1

EN 60950-1

UL60950-1

EN 60825-1

EN 60825-2

AS/NZS 60950-1

GB4943-2001

6.10 Environmental Protection Specifications

The environmental protection specifications for the BSC6810 are as follows:

ROHS: Restriction of the Use of Certain Hazardous Substances in Electrical and

Electronic Equipment)

WEEE: Waste Electrical and Electronic Equipment)

6.11 International Protection Specifications

The international protection degree of the BSC6810 is IP50.

6.12 Environmental Requirements

The storage, transportation, and working environments of the BSC6810 conform to

the following standards:

GB2423.1-1989

GB2423.2-1989

GB2423.4-1993

GB2423.22-1987 GB/T13543

ETS 300 019

NEBS GR-63-core

6.12.1 Storage Environment

This section describes the storage environment requirements in terms of the climate,

waterproofing, biology, air purity, and mechanical stress.



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I. Climatic Requirements

Table 1.1 describes the climatic requirements for storing the BSC6810.

Table 1.1 Climatic requirements for storing the BSC6810

Item Specification

Temperature 40C to +70C

Temperature change rate 1C/min

Relative humidity 10% to 100%

Altitude 5,000 m

Air pressure 70 kPa to 106 kPa

Solar radiation 1,120 W/m

Heat radiation 600 W/m

Wind speed 30 m/s

II. Waterproofing Requirements

The waterproof requirements for storing the BSC6810 are as follows:

The equipment is usually stored in a room.

There is no water on the ground of the room and no probability of water entering

the package.

There is no water that may damage the equipment. The water may come from

automatic fire protection devices and the air-conditioner.

If the equipment has to be placed outdoors, ensure that:

The package is intact.

Waterproofing measures are taken to prevent rainwater from entering the

package.

There is no water on the ground and no water may enter the package.

The package is not exposed to direct sunlight.

III. Biological Requirements

The biological requirements for storing the BSC6810 are as follows:

No fungus or mildew may grow in the equipment room or near the equipment.

The place is free from rodents, such as rats.



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IV. Air Purity Requirements

The air purity requirements for storing the BSC6810 are as follows:

The air is free from explosive, conductive, magnetically conductive, or corrosive

dust.

The density of physically active materials must meet the requirements listed in

Table 1.1.

The density of chemically active materials must meet the requirements listed in

Table 1.2.

Table 1.1 Storage requirements for physically active materials

Physically Active Material Unit Density

Suspended dust mg/m 5.00

Falling dust mg/mh 20.0

Sand mg/m 300

Note:

Suspended dust: diameter 75m

Falling dust: 75m diameter 150m

Sand: 150m diameter 1,000m

Table 1.2 Storage requirements for physically active materials

Chemically Active Material Unit Density

SO2 mg/m 0.30

H2S mg/m 0.10

NO2 mg/m 0.50

NH3 mg/m 1.00

Cl2 mg/m 0.10

HCl mg/m 0.10

HF mg/m 0.01

O3 mg/m 0.05



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V. Mechanical Stress Requirements

Table 1.1 describes the mechanical stress that the equipment can endure during

storage.

Table 1.1 Storage requirements for mechanical stress

Item Sub-item Specification

Sinusoidal vibration Offset 7.0 mm

Accelerated

speed

20.0 m/s

Frequency range 2 Hz to 9 Hz 9 Hz to 200 Hz

Unsteady impact Impact response

spectrum II

250 m/s

Static payload 5 kPa

Note:

Impact response spectrum: maximum acceleration response curve generated

by the equipment under specified impact excitation.

Impact response spectrum II means that the duration of semi-sine impact

response spectrum is 6 ms.

Static payload: capability of the equipment in package to bear the pressure from

the top in normal pile-up method

6.12.2 Transportation Environment

This section describes the transportation environment requirements in terms of the

climate, waterproofing, biology, air purity, and mechanical stress.


Table 1.1 describes the climatic requirements for transporting the BSC6810.

Table 1.1 Climatic requirements for transporting the BSC6810

Item Specification

Temperature 40C to +70C


Relative humidity 5% to 100%



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Item Specification

Altitude 5,000 m


Solar radiation 1,120 W/s

Heat radiation 600 W/s

Wind speed 30 m/s

II. Waterproofing Requirements

The waterproofing requirements for transporting the BSC6810 are as follows:

The package is intact.

Waterproofing measures are taken to prevent rainwater from entering the

package.

There is no water on the floor of the transportation vehicle.

III. Biological Requirements

The biological requirements for transporting the BSC6810 are as follows:

No fungus or mildew may grow in the vehicle. The place is free from rodents, such as rats.

IV. Air Purity Requirements

The air purity requirements for transporting the BSC6810 are as follows:

The air is free from explosive, conductive, magnetically conductive, or corrosive

dust.


Table 1.1.


Table 1.2.

Table 1.1 Transportation requirements for physically active materials


Suspended dust mg/m No requirement

Falling dust mg/mh 3.0

Sand mg/m 100



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Note:

Suspended dust: diameter75 m Falling dust: 75 m diameter150 m Sand: 150 m diameter1,000 m

Table 1.2 Transportation requirements for chemically active materials

Chemically Active Material Unit Density

SO2 mg/m 0.30

H2S mg/m 0.10

NO2 mg/m 0.50

NH3 mg/m 1.00

Cl2 mg/m 0.10

HCl mg/m 0.10

HF mg/m 0.01

O3 mg/m 0.05

V. Mechanical Stress Requirements

Table 1.1 describes the mechanical stress that the equipment can endure during

transportation.

Table 1.1 Transportation requirements for mechanical stress


Sinusoidal vibration Offset 7.5 mm

Accelerated

speed

20.0 m/s 40.0 m/s

Frequency

range

2 Hz to 9

Hz

9 Hz to 200

Hz

200 Hz to 500

Hz

Random vibration Spectrum

density of

10 m/s 3 m/s 1 m/s



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accelerated

speed

Frequency

range

2 Hz to 9

Hz

9 Hz to 200

Hz

200 Hz to 500

Hz

Unsteady impact Impact

response

spectrum II

300 m/s

Static payload 10 kPa

Note:

Impact response spectrum: maximum acceleration response curve generated

by the equipment under specified impact excitation.

Impact response spectrum II means that the duration of semi-sine impact

response spectrum is 6 ms.

Static payload: capability of the equipment in package to bear the pressure

from the top in normal pile-up method

6.12.3 Working Environment

This section describes the working environment requirements in terms of the climate,

biology, air purity, and mechanical stress.


Table 1.1 and Table 1.2 describe the climatic requirements for operating the

BSC6810.

Table 1.1 Climatic requirements for operating the BSC6810 - 1

Temperature Relative Humidity

Normal Safe Normal Safe

0C to 45C 5C to +55C 5% to 85% 5% to

95%



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Temperature Relative Humidity

Note:

The values are measured 1.5 m above the floor and 0.4 m in front of the

equipment, without protective panels in front of or behind the cabinet.

Safe refers to continuous operation for not more than 96 hours or accumulated

operation for not more than 15 days in a year.

Table 1.2 Climatic requirements for operating the BSC6810 - 2

Item Specification

Altitude 4,000 m



Solar radiation 700 W/m

Heat radiation 600 W/m

Wind speed 5 m/s

II. Biological Requirements

The biological requirements for operating the BSC6810 are as follows:

No fungus or mildew may grow in the area where the equipment is operated.

The place is free from rodents, such as rats.

III. Air Purity Requirements

The air purity requirements for operating the BSC6810 are as follows:

The air is free from explosive, conductive, magnetically conductive, or corrosivedust.


Table 1.1.


Table 1.2.



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Table 1.1 Working environment requirements for physically active materials


Dust particles Pa

RNC System Description

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