Zxc10 bscb product description

Product Type Technical Proposal

ZTE Confidential Proprietary © 2011 ZTE Corporation. All rights reserved. I

ZXC10 BSCB Product Description


ZTE Confidential Proprietary © 2011 ZTE Corporation. All rights reserved. I


Version Date Author Approved By Remarks

V1.0 2005-12-31 Zhu Yx Not open to the Third Party

2006-05-22 Zhu Yx

Update description of IBB, IPCF, SPCF and MP; Update complied standards; Add description of some indices with British measurement.

2008-2-21 Zhu Yx Huang Xa

Update description of EV-DO, such as reference model, standard complied, handoff, and VOIP/VT

2010-02-04 Li Chy Update Standard Complied and System Architecture

2010-03-16 Li Chy Modify Chapter 2.2 and Dimensions

2010-07-12 Li Chy

Liang Ming Modify Chapter 4

© 2011 ZTE Corporation. All rights reserved.

ZTE CONFIDENTIAL: This document contains proprietary information of ZTE and is not to be disclosed or used without the prior written permission of ZTE.

Due to update and improvement of ZTE products and technologies, information in this document is subjected to change without notice.


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TABLE OF CONTENTS

1 Overview ..................................................................................................................... 1 1.1 Background .................................................................................................................. 1 1.1.1 3G System Overview ................................................................................................... 1 1.1.2 Overview of the CDMA2000 All-IP Network ................................................................ 1 1.1.3 Introduction to the ZXC10 BSSB ................................................................................. 2 1.2 Position of ZXC10 BSCB in a Network ........................................................................ 2 1.2.1 CDMA2000 1X Network Architecture .......................................................................... 2 1.2.2 Interfaces of BSCB in the CDMA2000 1X Network ..................................................... 3 1.2.3 Model of CDMA2000 1xEV-DO Rev.A Radio Access Network ................................... 5 1.2.4 Interfaces of the BSCB in the CDMA2000 1xEV-DO Rev.A Network ......................... 6

2 Highlight Features ...................................................................................................... 9 2.1 Leading All-IP Network Solution .................................................................................. 9 2.2 Powerful Data Processing Capabilities ...................................................................... 10 2.3 Resource Sharing ...................................................................................................... 10 2.4 Integrated Service Support Capabilities with ZTE Characteristics ............................ 10 2.5 Advancement ............................................................................................................. 11 2.6 Comprehensive Functions ......................................................................................... 11 2.7 Compatibility .............................................................................................................. 11 2.8 High Reliability ........................................................................................................... 12 2.9 Flexible Configuration ................................................................................................ 12

3 Functionality ............................................................................................................. 14 3.1 Mobility Management ................................................................................................. 14 3.2 Authentication and Encryption ................................................................................... 14 3.3 Terrestrial Circuit Management ................................................................................. 14 3.4 Power Control ............................................................................................................ 14 3.4.1 Power Control for CDMA2000 1x .............................................................................. 14 3.4.2 Power Control for 1xEV-DO....................................................................................... 15 3.5 Handoff Control .......................................................................................................... 15 3.5.1 CDMA2000 1X Handoff Control ................................................................................ 15 3.5.2 1xEV-DO Handoff Control ......................................................................................... 16 3.6 Operation and Maintenance Management ................................................................ 16 3.7 Supporting vocoder mode .......................................................................................... 17 3.8 Supporting TrFO/RTO ............................................................................................... 17 3.9 Voice Service Function .............................................................................................. 17 3.10 1X Packet Data Service Functions ............................................................................ 17 3.11 1xEV-DO Data Service .............................................................................................. 17 3.12 Supplementary Services ............................................................................................ 18 3.13 Short Message Service .............................................................................................. 18 3.14 Circuit Data Service Functions .................................................................................. 18 3.15 Concurrent Service .................................................................................................... 18 3.16 Broadcast/Multicast Service ...................................................................................... 18 3.17 Test Call ..................................................................................................................... 19 3.18 Support V5 Interface .................................................................................................. 19 3.19 4GV-NB (EVRC_B) .................................................................................................... 19 3.20 Support Private Network Functions ........................................................................... 19 3.21 Push To Talk (PTT) Service ...................................................................................... 19 3.22 Location Services ...................................................................................................... 19 3.23 Wireless Public Phone ............................................................................................... 19 3.24 VoIP (with QOS) ........................................................................................................ 20 3.25 VT (with QoS) ............................................................................................................ 20


ZTE Confidential Proprietary © 2011 ZTE Corporation. All rights reserved. III

4 System Architecture ................................................................................................ 21 4.1 System Structure of BSCB ........................................................................................ 21 4.2 Level 1 Switching Subsystem(BPSN) ........................................................................ 23 4.2.1 Overview .................................................................................................................... 23 4.2.2 Working Principle ....................................................................................................... 23 4.2.3 Hardware Structure .................................................................................................... 23 4.3 Resource Subsystem (BUSN/BGSN) ........................................................................ 26 4.3.1 Overview .................................................................................................................... 26 4.3.2 Hardware Structure .................................................................................................... 26 4.4 Control SubSystem (BCTC) ....................................................................................... 35 4.4.1 Overview .................................................................................................................... 35 4.4.2 Working Principle ....................................................................................................... 35 4.4.3 Hardware Structure .................................................................................................... 36 4.4.4 Integrated Clock Module (ICM) .................................................................................. 40 4.4.5 Universal Interface Module (UIMC) ........................................................................... 41 4.5 Clock Subsystem ....................................................................................................... 41 4.6 Power Distribution Subsystem ................................................................................... 42 4.6.1 Overview .................................................................................................................... 42 4.6.2 Power Distributor (PWRD) ......................................................................................... 42

5 Technical Specifications ......................................................................................... 43 5.1 Running Environment Indices .................................................................................... 43 5.1.1 Dimensions ................................................................................................................ 43 5.1.2 Gross Equipment Weight and Ground Bearing Capacity of the Equipment Room ... 43 5.1.3 Working Voltage ........................................................................................................ 43 5.1.4 Power Consumption .................................................................................................. 43 5.1.5 Grounding Requirement ............................................................................................ 44 5.1.6 Temperature and Humidity ........................................................................................ 44 5.2 Performance Indices .................................................................................................. 44 5.2.1 Interface Indices ........................................................................................................ 44 5.2.2 Capacity Indices ........................................................................................................ 45 5.2.3 Clock Indices ............................................................................................................. 45 5.2.4 Reliability Indices ....................................................................................................... 46

6 Operation and Maintenance .................................................................................... 47 6.1 Overview .................................................................................................................... 47 6.2 Function Description of OMM .................................................................................... 47 6.3 Remote OMM ............................................................................................................ 48 6.4 Networking Modes of OMC ........................................................................................ 49

7 Appendix A: Standard Complied ............................................................................ 51 7.1 Primary Standards ..................................................................................................... 51 7.2 Lightning Protection ................................................................................................... 53 7.3 Safety ......................................................................................................................... 54 7.4 EMC ........................................................................................................................... 54 7.5 Environment ............................................................................................................... 55

8 Appendix B: Abbreviation ......................................................................................... 1


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FIGURES

Figure 1 Typical Network Structure of the 3GPP2 All-IP Network in LMSD Step-2 .................... 3

Figure 2 Interfaces of BSCB in the CDMA2000 1X Network ....................................................... 4

Figure 3 Model of CDMA2000 1xEV-DO Rev.A Radio Access Network ..................................... 6

Figure 4 Reference Model of CDMA2000 1xEV-DO Rev.A Network Interface ........................... 7

Figure 5 General Structure of a BSC Uniform Platform Network ............................................... 21

Figure 6 Multiple Services Mapping ........................................................................................... 22

Figure 7 Working Principle of Level-1 Switching Subsystem ..................................................... 23

Figure 8 Level-1 Switching Shelf................................................................................................ 24

Figure 9 Slots for Resource Shelf Boards .................................................................................. 26

Figure 10 BCTC Working Principle .............................................................................................. 35

Figure 11 Control Shelf (CLKG configured) ................................................................................. 37

Figure 12 Control Shelf f (ICM configured) .................................................................................. 38

Figure 13 Color Picture of BSCB Rack ........................................................................................ 43

Figure 14 Architecture of OMM .................................................................................................... 47

Figure 15 Networking Modes of remote OMM ............................................................................. 49

Figure 16 3-Layer Networking Structure of the OMC................................................................... 49

Figure 17 2-Layer Networking Structure of the OMC................................................................... 50

TABLES

Table 1 Temperature and Humidity Requirements ................................................................... 44

Table 2 abbreviation ................................................................................................................... 1


ZTE Confidential Proprietary © 2011 ZTE Corporation. All rights reserved. 1

1 Overview

1.1 Background

1.1.1 3G System Overview

With the fast growth of wireless services and the rapid expansion of Internet services, the wireless communication system has to meet increasing demands for system capacity, data transmission rate and strong support for diverse services. The 3G mobile communication system (IMT2000) draws the attention of the whole industry. The major feature of 3G mobile communication system is the support of broadband service, especially the multimedia data service efficiently using frequency spectrum. The 3G system is designed to provide a larger system capacity and better communication quality than 2G systems, implement seamless roaming around the world, and provide subscribers with multiple services.

Mainstream technical standards for the 3G are CDMA2000, WCDMA and TD-SCDMA.

The CDMA2000 adopts the spread spectrum rate of 1 x 1.2288Mcps. A single carrier occupies 1.25 MHz bandwidth. It adopts DS spread spectrum technology. The CDMA2000 system is also called CDMA2000 1X. In addition, the 1xEV-DO Rev.A, which serves as an enhanced standard supplemental to IS2000, supports data transmission up to 3.1Mbps in a bandwidth of 1.25 MHz. For the 1xEV-DO Rev.B, which adopts multi-carrier modulation technology, the spread spectrum rate is 3x/7x/15x 1.2288Mcps, respectively occupies 5/10/20 MHz bandwidth, the highest rate reaches 14.7 Mbps/34.3 Mbps/73.5 Mbps on the forward link and 5.4 Mbps/12.6 Mbps/27 Mbps on the reverse link (with 6850 chip).

1.1.2 Overview of the CDMA2000 All-IP Network

The evolution from traditional networks to All-IP networks helps network builders and operators offer more flexible service platform functions at lower costs. All-IP networks, when integrated with 3G wireless access technologies, enable provisioning of multimedia services over IP (including VoIP), giving network builders and operators competitive edge.

The overall structure of the CDMA2000 All-IP network consists of the radio access network and the core network. The evolution of the core network is independent from that of the radio access network.

The CDMA2000 network evolves to All-IP network in several phases: Phase-0, Phase-1, Phase-2 and Phase-3.

1 Phase-0 is a traditional network based on circuit switching. The access network is based on IOS 4.x, the air interface is based on cdma2000 and the core network is based on TIA/EIA-41.



2 Since Phase-1, the core network separates from the access network, forming independent signaling layer and bearer layer. The access network signaling is transmitted over IP.

3 Phase-2 corresponds to the LMSD (Legacy MS Domain) phase, which requires the IP network to support traditional terminal services and provide new service functions (such as TrFO/RTO) for users using new terminals.

4 Phase-3 corresponds to the MMD phase, and is the end point of the evolution to All-IP. In this phase, the air interface based on IP is implemented and finally IP-based transmission is realized throughout the network.

Such a way of phased and independent evolution offers flexibility to operators, and better supports the network transition policy of the traditional telecom operators.

1.1.3 Introduction to the ZXC10 BSSB

It is foreseeable that the multimedia information such as voice, data and video will be integrated into the IP network architecture, as are a consensus of the industry and a mega-trend of the telecommunication network. In response to the technical development trend, the ZXC10 BSSB has been developed on the basis of the IP platform. The ZXC10 BSSB consists of the ZXC10 BSCB and a series of BTSs. The ZXC10 BSSB features advanced and future-proof technology, high integration, large capacity and full ranges of product series. The ZXC10 BSSB can support the all the existing standards for the CDMA2000 1X and 1xEV-DO family, and it has supported the function of the CDMA2000 All-IP network in the LMSD phase, and supports the smooth evolution to the next generation ALL-IP network.

1.2 Position of ZXC10 BSCB in a Network

The ZXC10 BSCB is a new-generation product designed basing on the 3GPP2 series standard protocols and the All-IP platform structure. As an important part of the CDMA2000 1X/1xEV-DO system, it provides the BSC (Base Station Controller) and PCF (Packet Control Function Subsystem) function in the CDMA2000 radio access network (RAN).

The ZXC10 BSCB can support CDMA2000 1X and 1xEV-DO Rev.A simultaneously on the same platform, and support mixed insertion of the 1X and 1xEV-DO Rev.A. This system is compatible with IS-95 backward, and can be smoothly upgraded to CDMA2000 1xEV-DO Rev.B.

The ZXC10 BSCB already supports the functions of the CDMA2000 All-IP network in the

LMSD phase, IOS5.0, the separation of signaling from bearer, and the A1p/A2p interface. The IP transmission technology can be adopted to access it to the CDMA2000 core network that implements LMSD (Legacy Mobile Station Domain).

Note: The BSC and BSCB mentioned in this document refer to ZXC10 BSCB.

1.2.1 CDMA2000 1X Network Architecture

Figure 1 shows a typical CDMA20001X All-IP network in the LMSD phase.



xx 39

MSCe

MGW

zz

yy

PSTN

14

13

34

MAP

TIA / EIA- 41

MSCe

HLRe SCPe

A1

Illustration:

Signaling flow

Bearing service flow

MRFP

in

ter

ne

t

AAA

A1p

A2p

MSMS

Um

BSC/PCF Abis

BTSBTS

A2

RAN

A10/ A 11

PDSN

A10/ A11

BSC / PCF

(A interface)

Abis

BTSBTS

RAN

MRFP MGW

(Ap interface)

Figure 1 Typical Network Structure of the 3GPP2 All-IP Network in LMSD Step-2

The overall network architecture of the All-IP network in the LMSD phase consists of the

radio access network and the core network, which are independent of each other.

Radio Access Network (RAN)

Located between the MS (Mobile Station) and the CN (Core Network), the RAN is responsible for processing radio signals, terminating radio protocols, and connecting the MS with the core network. It consists of two parts, BSC/PCF (generally referred to as BSC) and BTS. In the CDMA 2000 RAN, the BSC is the control part in the BSS (Base Station System) to implement functions, such as call processing, service selection, resource allocation, background monitoring and BTS (Base Station Transceiver) access.

Core network

Core network performs the mobility management, network-side authentication and interface of public networks. The core network consists of the CS (Circuit Switching) domain and the PS (Packet Switching) domain: The CS network consists of NE such as MSCe, MGW, MRFP, SGW, SCPe and HLRe; the PS core network consists of PDSN (Packet Data Service Node) and AAA. The CS supports two transmission technologies, IP and TDM, to implement the access of the BSS. The CS core network can interwork with the TIA/EIA/IS-41 and GSM MAP networks, as well as the fixed PSTN.

1.2.2 Interfaces of BSCB in the CDMA2000 1X Network

Figure 2 shows the BSCB interface in the All-IP network of the CDMA2000 1X LMSD phase. The BSC is connected to the BTS via the Abis interface, to the MSCe/MGW via the A1p/A2p or A1/A2 interface, and to the PCF via the A8/A9 interface. The PCF is



connected to the PDSN equipment via the A10/A11 interface. BSCs are connected with each other via the A3/A7 interface.

A1/ A1p A2/A2 p

MSCe

A3( Service )

Destination BSS

A7 (Signaling)

A3 (Signaling)

BTSBTS

PCFPDSN

A8 (Service)

A9 (Signaling)

BSS

A interface

Reference point

A interface

Reference point

A 10 (Service)

MGW

ZXC10 BSCB

A11 (Signaling)

ZXC10 BSCB

Figure 2 Interfaces of BSCB in the CDMA2000 1X Network

The external interfaces of the BSCB are standard ones, and the interfaces between BSSB and MSCe/MGW, PDSN and PCF meet the CDMA2000 standard interface specification; the interface between the BSC and the BTS is the user-defined Abis interface.

BSCB supports the IOS5.0 protocol, and the A1p and A2p interfaces based on the IP transmission technology, through which it can be accessed to the MSCe/MGW. Meanwhile, the BSCB is compatible with the IOS4.* backwards, and provides the A1 and A2 interfaces to access it to the MSCe/MGW with the TDM transmission technology. However, for the same BSCB equipment, it can be accessed to MSCe/MGW in only one mode (IP or TDM).

Alp interface: When BSC is accessed to MSCe in the IP transmission mode, the

signaling interface between the BSC and the MSCe is the A1p interface. The A1p

interface bears the signaling messages related to call processing, mobility

management, radio resource management, authentication and encryption.

Al2p interface: When BSC is accessed to MGW in the IP transmission mode, the

voice bearing service interface between the BSC and the MGW is the A2p interface.

Al interface: When the BSC is connected to the MSCe over TDM, the signaling

interface between the BSC and the MSCe is the A1 interface. The A1 interface

bears the signaling messages related to call processing, mobility management,

radio resource management, authentication and encryption.



A2 interface: When the BSC is connected to the MGW over TDM, the voice bearing

service interface between the BSC and the MGW is the A2 interface. It bears the

64/56K PCM (Pulse Code Modulation) data between the SDU

(Selection/Distribution Unit) at the BTS side and the switching network at the MSC

side.

A3 interface: Support the inter-BSS soft handoff (BSC interconnection) when the

mobile station is in the traffic channel state. It is divided into two parts: the A3

signaling interface and the A3 traffic interface.

A7 interface: Support the inter-BSS handoff when the mobile station is not

controlled in the traffic channel state and supports the control flow when the mobile

station needs to establish the new traffic for inter-BSS soft handoff.

A8 Interface: Bear the data between BSS and PCF.

A9 interface: Bear the signaling transmission between BSS and PCF, and maintain

the A8 interface between BSS and PCF.

A10/A11 interface: Bear the transmission of signaling and data between PCF and

PDSN for maintaining the BSS-PCF A10 connection. The A10 interface bears data

while the A11 interface bearing signaling.

Abis interface: The Abis protocol is used for the interfaces between the BSC and

the BTS. It consists of two parts on the application layer: Control part (Abisc) and

traffic part (Abist), the former converts the Um interface control channel signaling

and the latter converts the control over the traffic channel.

1.2.3 Model of CDMA2000 1xEV-DO Rev.A Radio Access Network

The reference model for the CDMA2000 1xEV-DO Rev.A radio access network is shown in Figure 3.



Figure 3 Model of CDMA2000 1xEV-DO Rev.A Radio Access Network

The CDMA2000 1xEV-DO Rev.A system consists of Access Terminal (AT), Radio Access Network (RAN) and core network.

RAN

RAN provides the radio bearer between the core network and AT, responsible for establishing, maintaining and releasing radio channels, to manage the radio resources and mobility. RAN consists of such functional entities as Access Network, Packet Control Function (PCF) and Access Network AAA.

The AN consists of BSC and BTS. AN is a kind of network equipment that provides data connections between the packet network and the access terminal, to implement the BTS transceiving, call control and mobility management.

AN-AAA is a logical entity for the access network to implement access authentication and user authentication. It exchanges the parameters and results for access authentication with AN through the A12 interface.

PCF and AN jointly implement the radio channel control function related to the packet data service. In the specific implementation of BSCB, PCF is configured together with BSC, and the A8/A9 interface is the internal interface for AN/PCF. PCF communicates with PDSN through the A10/A11 interface.

Core network

The core network consists of packet core network and switching core network. The PS core network includes such functional entities as PDSN and AAA; the switching core network includes MSCe.

AT

AT is a device providing data connections for users. It can be connected to a computing device (such as a PC), or serve as an independent data device (such as mobile phone).

1.2.4 Interfaces of the BSCB in the CDMA2000 1xEV-DO Rev.A Network

In the CDMA2000 1xEV-DO Rev.A network, the BSCB interface is shown in Figure 4.

The external interfaces of the BSCB are standard ones, and the interfaces between AN and MSCe/MGW, PDSN, PCF and other ANs meet the standard interface specification 3GPP2 A.S0008; the interface between the BSC and the BTS is the user-defined Abis interface.



ATSource

ANPCF

Target

AN

PDSN

Air interface A8

A9

A10A11

AN AAA

A13

A16

A17 A1

8A19

A12

BSC

User data

connection

Signaling

connection

Figure 4 Reference Model of CDMA2000 1xEV-DO Rev.A Network Interface

Abis Interface: The Abis protocol is an interface protocol between the BSC and BTS.

It contains two parts in the application layer: control part (Abisc) and service part

(Abist). The control part converts the Um interface control channel signaling, and

the service part controls the traffic service channel.

A8/A9 interface: It is used to bear the signaling and data between AN and PCF. The

A9 interface bears signaling, used for maintaining the A8 data connection between

AN and PCF.

A10/A11 interface: It bears the signaling and data between PCF and PDSN for

maintaining the A10 data connection. The A11 interface bears signaling.

A12 interface: It connects the AN to the AN AAA for signaling transmission only.

This interface implements the AT terminal access authentication function at the AN

level. After the authentication of the MS/AT access is successful, the AN-AAA

returns MNID to AN for the interface between A8/A9 and A10/A11. The A12

interface uses the RADIUS protocol (Remote Authentication Dial-In User Service).

A13 interface: It is used to support exchanging information related to this AT

between the source AN and the destination AN when AT is roaming.

A16 interface: It uses the signaling message to deliver the AT’s active connection

status information between the source AN and the target AN to implement hard

handoff.

A17 interface: It is used to deliver the signaling message between the source AN

and the target AN to assign the target AN resources required to implement soft



handoff. Besides, the A17 interface can deliver the control channel message of the

source AN to the target AN.

A18 interface: It is used to deliver the AT’s media plane information between the

source AN and the target AN during soft handoff.

A19 interface: It is used to deliver the handoff control information between the

source AN and the target AN during soft handoff.



2 Highlight Features

As an upscale, high performance and forward-looking platform, the All-IP structure based BSCB can merge into the future All-IP networks and meet various demands of the 1X, 1XEV-DO Rev 0/A/B), PTT and WMAN (Wireless Metropolitan Area Network) access.

BSCB has the following features:

2.1 Leading All-IP Network Solution

All-IP technologies are the trend of network development. ZTE is the advocate and front-runner of All-IP technologies. ZTE’s All-IP network solution includes All-IP equipment and All-IP networking as follows.

All-IP equipment

i Based on the All-IP architecture, ZTE’s BSS not only meets the demands of the future network and service development, but supports smooth upgrade to the All-IP network in the IMS/MMD domain.

ii The development trend of the industry is providing All-IP based equipment, with mature accessories and improved supply chain. ZTE’s BSS in the All-IP structure copes with the industry development direction. Owing to the long equipment lifecycle, it is able to help the operators reduce future expansion costs and maintenance costs.

All-IP networking

iii External interface: As its external interfaces are all based on IP, ZTE’s BSS supports All-IP networking without the need to make special conversion for these interfaces.

iv Network transmission: As intra-BSS switching and all internal processings are done on the IP level, ZTE’s BSS supports All-IP network transmission without the need to make internal format conversion. It has the industry-recognized highest transmission efficiency.

v QoS: ZTE’BSS completely achieves IP-based QoS.

vi Ap interface: ZTE is the first company in the world to provide the standard Ap interface (based on 3GPP2 IOS5.0 Protocol) and to put the Ap interface into global markets for commercial use. The adoption of the Ap interface can greatly slash the operator’s construction costs (CAPEX) and operating costs (OPEX). It has the following advantages over the A interface:

Saves 80% transmission bandwidth between the BSC and the MGW.

Saves 30% to 50% vocoders.

Provides higher voice quality.



Supports Ethernet transmission to reduce the cost.

Helps the existing network evolve into the All-IP network in the IMS/MMD domain more smoothly.

2.2 Powerful Data Processing Capabilities

The continuous growth of services such as packet data and VoIP has imposed

increasingly high requirements on the BSC’s data processing capabilities. ZTE’s

BSC supports a maximum of 6 Gbps data throughput, keeping ahead in the industry.

ZTE’s BSC supports voice service capacities of up to 50,000 Erl, keeping ahead in

the industry.

One BSC supports both 1X and EV-DO services.

2.3 Resource Sharing

ZTE’BSS has a powerful capacity of resource sharing as follows:

It supports sharing of full-BSC vocoder, selector, PCF, and IWF resources.

1X and EV-DO systems share the Abis interface bandwidth to implement complete

load sharing, streamline the network architecture, and reduce transmission

investment.

The BSC shares the same hardware platform with the core network. It supports

smooth evolution and minimizes the users’ investment.

2.4 Integrated Service Support Capabilities with ZTE Characteristics

ZTE CDMA-based GoTa service provides professional trunking function, supports

PAMR and PMR operation, and offers the users with new profit model and profit

margin.

Coupled with the MSS and the PDSS, ZTE’s BSS provides abundant service types

including voice call, packet data call at rates of up to 307.2 kbps, concurrent

services of voice and data, circuit data services (asynchronous data and G3 fax),

supplemental services and short messages. It also provides the EV-DO Rev.A

solution and the EV-DO Rev.B solution, the EV-DO Rev.A solution supports packet

data call with the highest rate reaching 3.1 Mbps on the forward link and 1.8 Mbps

on the reverse link, suitable for the delay-sensitive applications with symmetric data

rates, for instance, VoIP, wireless games, and video telephony. The EV-DO Rev.B

solution supports packet data call with the highest rate reaching 14.7 Mbps on the



forward link and 5.4 Mbps on the reverse link by using the CSM6850 chip and the

3i-carrier bundling technology. Besides, ZTE’s BSS supports location services, PTT

services and other featured services with differential advantages. All these services

help the operators not only attract more user groups, but also boost their overall

network competitiveness, and generate more revenues.

ZTE broadband BSC and the broadband BTS form a future-proof integrated service

support platform.

2.5 Advancement

The system adopts lots of advanced designs and patent technologies:

Adopts the next generation communication platform: High-performance and

prospective All-IP platform;

With the powerful system hot-swappable function supported by all the boards;

With advanced processing system in the distribution mode;

With powerful online upgrading capability (including logics, MCU program, BOOT

program and FLASH files) to facilitate the maintenance.

2.6 Comprehensive Functions

The system provides the following comprehensive functions to meet the actual commercial demands:

Provides integrated primary power supply to realize -48V direct supply;

Provides integrated built-in SDH (Synchronous Digital Hierarchy);

Supports integrated environment monitoring;

Supports the complete software/hardware version management system.

2.7 Compatibility

Compatibility of the previous/future systems is taken into full account during system design:

Support 1X and IxEV-DO (including EV-DO Release 0 and EV-DO Rev.A) on the

same platform, and support mixed insertion of their boards.

Support smooth upgrading to the 1xEV-DO Rev.B system;



Support smooth upgrading to the later All-IP network.

Compatible with the IS-95 system.

2.8 High Reliability

High reliability is achieved on the basis of reliable designs:

All the main control boards support the 1+1 backup function;

All the key boards, such as the Abis link and CLKG, whose failure may incur system

interruption, support the 1+1 backup mode;

Provides system redundancy of the vocoder elements, selection elements and PCF

elements in the form of resource pool;

Supports payload sharing and link backup of the Abis interface communications and

the fiber networking backup function;

Eliminates the single point faults and adopts the error-tolerance design of the

software to improve system reliability;

The design meets the high/low temperature condition for system running and

relative standard of the communication products; comply to ETSI EN 300 019

Environmental conditions and Environmental tests for telecommunications

equipment;

The design meets the EMC (Electronic Magnetic Compatibility) condition for system

running and relative standard of the communication products; comply to EN 300

386 Electromagnetic compatibility and Radio spectrum Matters (ERM);

Telecommunication network equipment; ElectroMagnetic Compatibility (EMC)

requirements ;

The design meets the installation condition.

2.9 Flexible Configuration

The BSCB system is designed with multiple interfaces and abundant board/module components; therefore, it supports flexible configurations:

Supports the configuration mode with a single shelf forming an office;

Supports flexible configurations and interchangeable insertion of types of resource

boards according to the actual configuration;



With the boards of different types and versions, it can satisfy diversified

configurations requirements;

Widely adopts the sub-cards to ensure flexible configurations and easy extension

and upgrading, thus satisfying the requirements for better functional performance at

lower cost;

Sets the quantity of the system interfaces/ports: Adds/reduces the interfaces, such

as the FE/GE, E1/T1 and STM-1 (Synchronous Transfer Mode I) interfaces,

according to the customer configuration requirements;

Supports configuration of the primary PWS cabinet (-48V DC);

Supports configurations of the built-in SDH system



3 Functionality

The main functions of the BSCB are as follows:

3.1 Mobility Management

It provides mobility management, including registration (with specific authentication process), SSD (Shared Secret Data) updating, terminal authentication, parameter update, status query and message waiting indication.

3.2 Authentication and Encryption

SSD update of control channel in 1X system;

SSD update of traffic channel in 1X system;

Specific authentication of control channel in 1X system;

Specific authentication of traffic channel in 1X system;

IS-856 authentication of the 1xEV-DO system

AN-side access authentication of the 1xEV-DO system

Support encryption services of voice, data and signaling.

3.3 Terrestrial Circuit Management

Including allocation/release, block/unblock and reset of the terrestrial circuit and reset of the global system.

3.4 Power Control

3.4.1 Power Control for CDMA2000 1x

Power control can control the actual transmission power of the mobile phone or BTS in radio transmission to keep it as low as possible, to reduce the power consumption of mobile phone and BTS and the interference of the entire CDMA network.

Power control can be divided into forward power control and backward power control, either of which is performed independently. The so-called backward power control refers to the control of the mobile phone transmitting power, while forward power control refers to the control of the BS transmitting power.



In a CDMA cellular mobile communication system, the following power control modes are available:

Backward open-loop power control

Backward closed-loop power control

Backward outer-loop power control

Forward closed-loop power control

3.4.2 Power Control for 1xEV-DO

In 1xEV-DO system, as the forward power is constant, there is no problem of power control. Power control is performed in the reverse channel, which involves open loop power estimation and close loop power correction.

The reverse power control has a control over the output power of the accessed terminal to ensure the quality of the reverse link while minimizing the interference and maximizing the system capacity. Only when the average reverse link SNR of each user supports the acceptable performance with the minimum overheads can the system achieves the largest capacity.

The power control for 1xEV-DO falls into three parts:

Open loop power control: The AT (Access Terminal) determines the condition of the

reverse link based on the receiving power of the forward pilot channel, and adjusts

the initial transmitting power to compensate the path loss;

Close loop power control: The AT feedbacks the power control information in the

RPC (Reverse Power Control) based on the demodulation performance of the

reverse data, and adjusts the transmitting power of the reverse pilot;

Outer loop power control: BSC adjusts the comparative threshold in the inner loop

power control based on the quality of the reverse link frame. AN judges the quality

of data frame according to the CRC check.

3.5 Handoff Control

3.5.1 CDMA2000 1X Handoff Control

Softer handoff and soft handoff: BSC supports up to 6-way softer handoff. BSC

supports up to 6-way soft/ softer handoff;

Inter-Frequency semi-soft handoff at boundary of different carriers: The Inter-

Frequency semi-soft handoff between borders with different carrier frequencies

includes three ways: handoff, hand-down and MS auxiliary inter-frequency semi-soft



handoff. For the IS95A mobile phones, the BS auxiliary inter-frequency handoff

algorithm is supported; for the IS95B mobile phones and later versions, the

candidate pilot search auxiliary handoff algorithm is supported; for the IS95B mobile

phones and later versions, hard handoff

Soft handoff between BSCBs: FCH (Fundamental Channel) soft handoff between

the interconnected BSCBs, SCH (Supplemental Channel) soft handoff between the

interconnected BSCBs;

Inter-BSCB hard handoff;

Intra-BSCB Access handoff;

Inter-BSCB Access handoff ;

Handoff between the 1X network and the 1xEV-DO network.

3.5.2 1xEV-DO Handoff Control

Idle handoff: Supports of idle handoff of AT cross cell, BTS, BSC/PCF and PDSN.

Soft handoff plus and softer handoff plus

Soft handoff and softer handoff minus

Forward virtual handoff

A13 handoff between ANs (idle handoff)

Cross-subnet handoff inside AN

Idle handoff between the 1X network and the 1xEV-DO network

Data service handoff between 1X and 1xEV-DO in the active state

Inter-AN hard handoff (based on A16 interface)

Inter-AN soft handoff (based on A17/A18/A19 interface)

3.6 Operation and Maintenance Management

Including version download, data configuration and synchronization, alarm and diagnosis test.



3.7 Supporting vocoder mode

Supports the QCELP 8K, QCELP 13K, 8K EVRC and 4GV-NB modes.

3.8 Supporting TrFO/RTO

TrFO/RTO is one of the functions of the CDMA2000 All-IP network in the LMSD phase.

TrFO (Transcoder Free Operation) means that two mobile stations have the network capability to make the MS-MS call with the same encoding/decoding. It transmits compressed voices in the bearer path of the packet network between traditional mobile phones through saving the encoder/decoder. The transcoder is placed at the network side, and associated with MGW. Through only transmitting the compressed voice, TrFO improves its bandwidth utilization and reduces its loop delay. In addition, it can improve the voice quality.

RTO (Remote Transcoder Operation) refers to the network capability that is incompatible with the encoding/decoding at the end point. RTO tries to establish the bearer path with the single code conversion to match the incompatible encoding/decoding. The ideal compressed voice is transmitted between the end points. For the case where there is no single code conversion used for establishing bearers, two Tandem code conversions are needed, to search for a matching code between the two end points. RTO is a special case of TrFO.

3.9 Voice Service Function

Supports MS-originated call, MS-terminated call;

MS release, MSC release and BSC release.

3.10 1X Packet Data Service Functions

RC4 is used in the forward of the air interface, with the maximum data rate of 307.2 kbps supported; RC3 is used in the reverse, with the maximum data rate of 153.6 kbps supported.

3.11 1xEV-DO Data Service

1xEV-DO Release 0 supports maximum data rate of 2.4Mbps in Forward link and

153.6kbps in Reverse link; 1xEV-DO Rev.A supports maximum 3.1Mbps in Forward link

and 1.8Mbps in Reverse link; 1xEV-DO Rev.B supports maximum 14.7 Mbps in Forward

link and 5.4 Mbps in Reverse link by using the CSM6850 chip and the 3-carriers

bounding tenology.



3.12 Supplementary Services

Call Wait, three-way call, call transfer and call forward and so on;

Tone DTMF (Dual Tone Multiple Frequency) Transfer: BSC will transfer DTMF tone

when BSC receives DTMF signaling from MS. BSC supports single Tone DTMF

and Burst DTMF.

3.13 Short Message Service

Supports sending short message of MS through control channels;

Supports receiving short message of MS through control channels;

Supports sending short message of MS through traffic channels;

Supports receiving short message of MS through traffic channels.

3.14 Circuit Data Service Functions

The circuit data services, prescribed in the IS-707 standard, are provided at the rate

up to 14.4 Kbps;

Supports direct access of bypass Modem to IP networks;

Email receiving and sending, WWW service, FTP service; ATM, POS (Point of

Sales) and other bank charging terminal services support;

PC fax, dial-up access, access to the private network VPN.

3.15 Concurrent Service

The concurrent data and voice services support the coexistence of the voice and data services. That is, the concurrent transmission of data is possible when a voice conversation is under way.

The concurrent service requires the use of Release A mobile phones.

3.16 Broadcast/Multicast Service

BCMCS (Broadcast-Multicast Service) is an application developed basing on the 1xEV-DO system, used for providing the broadcast/multicast service for users. The purpose for providing such a service is to improve the carrier/sector data efficacy of operators, for example, if the 400 K BCMCS service is provided, the equivalent forward data traffic can reach 12 M if there are 30 subscribers using the BCMCS under each carrier/sector.



3.17 Test Call

MS originates markov, including 8K full rate, 8K variable rate, 13K full rate, 13K

variable rate;

The OMM originates markov, including 8K full rate, 8K variable rate, 13K full rate,

13K variable rate, without need of MSC;

Support MS-originated TDSO call;

Support OMM-originated TDSO call.

3.18 Support V5 Interface

It implements direct interconnection of BSC and PSTN, supports the V5 interface, and enables the V5 users to roam between BSCs.

3.19 4GV-NB (EVRC_B)

EVRC-B has the following advantages over other encoders:

1. Allowing the operators to give preference to voice quality or network capacity

2. Improving the network capacity by 40% through the combination of QLIC (including pilot and traffic channel interference cancellation) and EVRC-B

Compared with other encoders, EVRC-B can greatly improve the network capacity and thus reduce the users’ cost.

3.20 Support Private Network Functions

The private networks require unique voice encryption function to implement conversation between users with different confidentiality levels, and to schedule the conversations.

3.21 Push To Talk (PTT) Service

Supports PTT service based on GOTA (Global Open Trunking Architecture) technology, such as location management, group call, private call, call authority management, group management, supplementary services, Dispatch Terminal Management, etc.

3.22 Location Services

Support PN4747 and GPSONE positioning modes.

3.23 Wireless Public Phone

Support wireless public phone based on polarity reversal charging.

Support wireless public phone based on pulse charging.



3.24 VoIP (with QOS)

VoIP refers to the voice service over the IP network. It is sensitive to delay. ZTE 1xEV-DO Rev.A provides QoS features. It is able to provide applications with different priorities, thus ensuring VoIP user experience. ZTE EV-DO Rev.A realizes EMPA, non HDLC-like packet processing, and AN-Based ROHC compression described in 3GPP2 C.S0063-A and A.S0008-B to greatly improve the utilization of radio bandwidth.

3.25 VT (with QoS)

VT refers to the video phone service based on EV-DO Rev.A packet switch mode, that is, realtime duplex audio/video mobile communication. VT service protocol stack contains two planes:

Control plane: uses SIP/UDP/IP as call control signaling protocol.

Media plane: uses RTP/UDP/IP as voice and video transmission protocol.



4 System Architecture

4.1 System Structure of BSCB

The BSCB is an upscale radio access product based on the All-IP technology. The general structure of an All-IP network is shown in Figure 5.

As shown in Figure 5, there are two levels of switching structure:

1 Level 1 switching: For an IP service, it can be the Ethernet switching or the direct switching of the Crossbar+ network processor/network processor;

2 Level 2 switching: For an IP service, it can be the Ethernet switching.

Figure 5 General Structure of a BSC Uniform Platform Network

BSCB can access and process multiple traffic flows: Circuit, IP (Internet Protocol), ATM (Asynchronous Transmission Mode) and HIRS (High-speed Interconnect Router Subsystem) traffic flows, as shown in Figure 6.



Figure 6 Multiple Services Mapping

Mutual mapping is available between services:

A circuit service can be converted into an IP service through code mapping and vice

versa;

An HIRS service can be converted into an IP service through frame mapping and

vice versa;

An ATM service can be converted into an IP service through cell mapping and vice

versa;

An ATM service can be converted into a circuit service through IP indirect mapping

and vice versa;

An HIRS service can be converted into a circuit service through IP indirect mapping

and vice versa;

An HIRS service can be converted into an ATM service through IP indirect mapping

and vice versa.

As the control part of the BSSB, the BSCB provides the Abis interface with the BTS and A interface with the MSC and PDSN. It executes the control, management and maintenance for one or multiple BTSs attached to it, and provides service channels and SS7 signaling interfaces to the MSC or MSCe/MGW.

The BSC adopts the 19-inch standard rack where four 8U standard plug-in boxes can be supported. However, only three of them can be configured upon configuration of a GPS plug-in box. Designed with the Compact PCI standard, universal BSC plug-in boxes adopt the 8U space with boards being plugged from both the front and back sides. Each plug-in box has 17 slots.

A BSC consists of the level-1 switching subsystem (BPSN), resource subsystem (BUSN), control subsystem (BCTC) and Power Distribution subsystem.



4.2 Level 1 Switching Subsystem(BPSN)

4.2.1 Overview

As the core switching part in the BSC, Level 1 switching subsystem provides necessary data transmission channels for functional entities internal/external the system, so as to implement the exchange of multiple data (Timing, signaling, voice services and data services) and provide different customers with corresponding QoS (Quality of Service) function according to the service requirements.

4.2.2 Working Principle

Working principle of the Level-1 switching subsystem is shown in Figure 7.

PSNPSN

GLIGLI

GLIGLI

UIMUIM

HSSL

ControlStream FE

Control Bus

BUSN BUSN

Master MasterSlave Slave

ControlCenter

(CHUB)

4*FE

CLKGCLKGClock

Figure 7 Working Principle of Level-1 Switching Subsystem

The level-1 switching subsystem adopts the high-speed switching of the backplanes. The network processing modules will first decide the data forwarding route at the physical interface, and then send the data to the switching network for exchange through high-speed exchange and connection of the backplanes.

As the control bus inside the system that connects each module, the UIM switching Ethernet bus completes distribution/collection of the routing information, system configuration/maintenance/management, and transmission of the high-level protocol and signaling data.

4.2.3 Hardware Structure

The level 1 switching subsystem (BPSN) is the core packet switching node of the BSC, consisting of PSN4V/PSN2, GLIQV/GLI2, and UIMC/UIMC2 and BPSN backplane.



The functions of these boards are described below:

GLIQV/GLI2

GLIQV/GLI2 is a cable interface board that belongs to Level 1 packet switching subsystem. The board implements physical layer adaptation, IP packet table check, fragmentation, forwarding and flow management, and enables other subsystems gain access to Level 1 IP switching subsystem.

UIMC/UIMC2

UIMC/UIMC2 used in the control subrack and Level 1 switching subrack implements Ethernet switching of control flow message.

PSN4V/PSN2

As a self-routing matrix switching system, PSN4V/PSN2 works with the queue engine on the cable interface board to provide the switching function.

PSN4V/PSN2 of Level 1 switching subsystem implements packet data switching between GLIQV/GLI2.

BPSN backplane

The BPSN fulfills Ethernet switch in the control plane. The system receives clock from CLKG/CLKD/ICM and transmit it to UIMC/UIMC2. UIMC/UIMC2 distributes the system clock to each service slot in the BPSN through the BPSN backplane. In addition, the

BPSN backplane provides –48 V power.

For example, configurations of the level-1 switching shelves are shown in the following Figure 8 (take the PSN and GLI for example):

Level-1 Switching Shelf (BPSN)

1 2 3 4 5 6 7 8 9 10

11 12

13

14

15

16

17

G

L

I

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L

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L

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NC

Figure 8 Level-1 Switching Shelf

Notes: NC indicates dummy panel. The PSN is the PSN4V/PSN2 and the GLI is GLIQV/GLI2, unless otherwise specified.

4.2.3.1 Vitesse Packet Switch Network 40Gbit/s (PSN4V/PSN2)

Vitesse Packet Switch Network 40 Gbit/s (PSN4V/PSN2) board implements packet data switch between line cards. PSN4V/PSN2 is a self-routing matrix switching system and co-operates with GLIQV board to complete switching function.



Following are the functions of the PSN4V/PSN2 board.

Provides 40 Gbit/s bidirectional user data switching capability.

Implements 1+1 load sharing and supports changeover manually and changeover

via software.

Provides two 10/100M Ethernet channels as control channels.

Supports reading physical IDs such as rack ID, shelf ID and slot ID, and provides

version identification function.

4.2.3.2 Vitesse Quad GE GLI (GLIQV/GLI2)

Vitesse Quad GE GLI (GLIQV/GLI2) board is a line interface board of level-1 packet switching subsystem, and implements physical layer adaptation, IP packet table search, fragmentation, forwarding and traffic management.

1 GLIQV

Following are the functions of GLIQV board.

Provides four GE ports (1+1 backup for each GE optical port) and backup of GE

ports with adjacent GLIQV boards.

Provides 2.5 Gbit/s bidirectional wire-speed processing/forwarding and traffic

management ability.

Provides active/standby Ethernet communication channel.

Provides Ethernet control flow channel.

2 GLI2

Following are the functions of GLI2 board.

Provides four GE ports (1+1 backup for each GE optical port) and backup of GE

ports with adjacent GLIQV boards.

Provides 2.5 Gbit/s bidirectional wire-speed processing/forwarding and traffic

management ability.

Provides active/standby Ethernet communication channel.

Provides Ethernet control flow channel.

Provides two 1,000M Ethernet media flow interfaces.

Provides a 100M media-and-control transfer Ethernet interface.



The Ingress and Egress systems provide respectively a debugging 232 serial port.

Provides a RS485 interface to fulfill communication with the monitoring board.

4.2.3.3 Universal Interface Module (UIMC/UIMC2)

Refer to Section 4.3.2.5.

4.3 Resource Subsystem (BUSN/BGSN)

4.3.1 Overview

The Resource subsystem (BUSN/BGSN) provides the external interfaces of the BSC for access process in various modes and processing of relative lower-level protocols. In addition, it also provides types of resource processing modules to implement processing of the radio protocols.


The resource subrack (BUSN/BGSN) is the smallest unit in BSC system resource processing. It completes user plane processing. Multi-BUSNs/BGSNs can smoothly expand capacity by interconnection via the BPSN. The resource subsystem includes the BUSN/ BGSN backplane, UIMU/UIMU2 boards and various resource access processing boards, such as DTB, SDTB, ABPM/ABPM2, IPI/IPI2, SIPI, INLP, IBBE/IBBE2, HGM/HGM2, ABES/ABES2, SDU/SDU2, SPB/SPB2, VTCD and IWFB.

Among them, as the backplane of Universal Switching Network, BUSN supports the mixed insertion of various service processing boards, which thus constructs the universal service processing subsystem. BGSN is Gigabit universal service backplane and supports the mixed insertion of large-traffic boards as well as the insertion of small-traffic boards.

The resource subrack can be configured with several boards. Take the following board combination for instance to explain the configuration of resource shelf.

Resource Shelf (BUSN/BGSN)

1 2 3 4 5 6 7 8 9 10

11 12

13

14

15

16

17

D

T

B

D

T

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Figure 9 Slots for Resource Shelf Boards

4.3.2.1 IP Bearer Access Board (IPI/IPI2)

IP bearer Interface (IPI) board provides A2p interface between BSC and Media Gate Way (MGW).



IPI2 is upgraded from IPI and has the same software function with it.

Following are the functions of the IPI/IPI2 board.

Provides control flow Ethernet interface.

Provides Ethernet data backup channel.

Provides RS485 backup control channel interface.

Implements 1+1 active/standby logic control.

IPI provides four FE interfaces to connect the external network.

IPI2 provides four external FE interfaces or one GE interface (optical or electrical).

4.3.2.2 Abis Processing Module (ABPM/ABPM2/ABPM3)

In BSC, ABPM (Abis processing unit) board is used in Abis interface co-processing. It provides low speed link to complete the IP compression co-processing.

ABPM2 is upgraded from and has the same software function as ABPM.

Following are the functions of ABPM/ABPM2 board.




Supports cUDP/PPP/ML-PPP processing.

Supports at least 256 High-level Data Link Control (HDLC) protocols.

ABPM3 is the upgrade version of ABPM2. Besides the above basic functions of

ABPM/ABPM2 board, digital trunk is simultaneously added to the hardware and software

functions.

ABPM3_B provides two 155 M STM-1 (Synchronous Transport Module, level 1)

standard optical interfaces, compatible with E1 and T1; equivalent to the function of

ABPM2+2xSDTBs;

ABPM3_A provides 32xE1/T1 physical interfaces; equivalent to the function of

ABPM2+1xDTBs



4.3.2.3 Interface Board of PCF (IPCFE/IPCF2)

Interface of PCF by FE (IPCFE) board supports external packet network connection, receives IP data from external network, differentiates and distributes IP data to the corresponding internal functional boards.

IPCF2 is upgraded from IPCF and has the same software function with it.

Following are the function of IPCFE/IPCF2 board.

Provides 1x100 M control flow Ethernet interface.

Provides 1x100 M Ethernet data backup channel.



IPCFE provides four external 100M Ethernet electrical interfaces, while IPCF2

delivers four external FE interface or one external GE interface (optical or electrical).

4.3.2.4 User plane of PCF (UPCF/UPCF2)

User Plane of PCF (UPCF) board processes PCF user plane protocols, supports PCF data sequencing and processes some special protocols.

UPCF2 is upgraded from and has the same software function as UPCF. Since UPCF2 integrates functions of both UPCF and UPDC, UPDC2 is not individually provided.

Following are the functions of UPCF/UPCF2 board.



Provides media flow Ethernet interfaces.


4.3.2.5 Universal Interface Module (UIM/UIM2/GUIM)

Universal Interface Module (UIM/UIM2) has two types:

Universal Interface Module for Universal (UIMU)

UIMU board consists of UIM motherboard and GEBASE1000_X Subcard (GXS)

UIMU board implements Ethernet Level-2 switching and CS domain timeslot multiplexing/switching inside BUSN shelf, and manages BUSN shelf. UIMU



board provides external interfaces include GE optical interface and Ethernet interfaces (4 FE interfaces).

Universal Interface Module for Control (UIMC)

UIMC board consists of UIM motherboard and GE Connect Subcard (GCS).

UIMC board provides Ethernet Level-2 switching inside BCTC shelf and BPSN shelf and manages the shelves.

Following are the functions of UIM board.

Provides function to read cabinet ID, shelf ID, slot ID, equipment ID, backplane

version ID and backplane type ID.

Provides MAC configuration, VLAN and broadcast packet control.

Manages shelf and internally provides RS485 management interfaces.

Receives drives and distributes system clocks inside shelf.

UIMU board provides circuit switching function for resource shelves while UIMC

board does not.

UIMU board provides one user plane GE optical interface for interconnection

between resource shelf and core switching unit. GE channel works in active/standby

mode for 1+1 backup of core switching unit.

UIMU/UIMU2 provides two 24+2 exchange type HUB, one is control plane Ethernet

HUB, another is user plane Ethernet HUB.

UIMC/UIMC2 board provides Ethernet interconnection for control plane and user

plane through its GCS subcards.

GUIM (Gigabit Universal Interface Unit) consists of GUIM mother board and CPU

subcards whose type is SCT_3G_85XX.

GUIM provides the following functions:

Reading data such as rack No., shelf No., slot No., equipment No., backplane

version No., and backplane type No.;

MAC (Media Access Control) configuration, VLAN, broadcast packet control;

Management inside the shelf, offering RS485 management interface internally;

System clock reception and driving distribution inside the shelf;

Hundred and Gigabit Ethernet switching over control plane and media plane inside

the BGSN resource shelf, and narrowband link inside the shelf; offering external

cascade connection interface of resource shelf;

Offering a 48FE+4GE switching HUB, dividing 48 interfaces into two switching

planes: one being the control plane Ethernet HUB, which provides the



interconnection of 19 FE interfaces and boards inside the resource shelf as well as

one 1000baseT Ethernet interface for the interconnection of CHUB inside the shelf

internally; and provides six control plane FE interfaces for the interconnection

between resource shelves or between resource shelf and CHUB externally; and the

other being the user plane Ethernet HUB, which provides 21 FEs internally for the

interconnection of resource shelves;

Providing a 24GE+2*10GE switching HUB, offering 19 GE SerDes switch interfaces

for service slots; providing two sets of user plane active/standby GE optical

interfaces for the mutual connection between resource shelves or between resource

shelf and core switching unit; as well as two 10G optical interfaces for the

convergence or connection of resource shelves;

1+1 (active/standby) logic control

4.3.2.6 Selection/Distribution Unit (SDU/SDU2/SDU3)

There are three Selector and Distributor Unit (SDU) boards in ZXC10 BSCB; Selector and Distributor Unit (SDU) board and Selector, Distributor Unit2 (SDU2) board and Distributor Unit3 (SDU3) board and. The differences between these boards are:

Subcard type of SDU board is SCT_3G_PPC755, subcard type of SDU2 board is SCT_3G_85XX whereas subcard type of SDU3 board is SCT_3G_8548.

SDU/SDU2/SDU3 board processes wireless voice and data protocols, implements data selection/multiplexing /demultiplexing, and completes Radio Link Protocol (RLP) and A8 interface protocol processing.

Following are the functions of the SDU/SDU2/SDU3 board.

Provides four CPU subsystems that are mutually independent of one another (one

of them is the master).

Provides four FE interfaces and supports Virtual Local Area Network (VLAN)

broadcast.

Provides precise network clock for charging.

Supports BCMCS service.

4.3.2.7 HIRS Gateway Module (HGM/HGM2)

HIRS Access and Handoff Gateway Module (HGM) is compatible with CDMA2000 1X High-speed Interconnect Router Subsystem (HIRS) equipment, and provides Abis access of HIRS BTS and all IP BSC. It also provides handoff between IP BSC and HIRS BSC, IP BSC and IP BSC.

HGM2 is upgraded from HGM and has the same software functions with HGM.

Following are the functions of HGM/HGM2 board.






Provides access ability of 8 x 8 M HW.

Provides 4 media flow Ethernet interfaces.

Supports HIRS protocol processing capability and implements protocol conversion

between HIRS and IP.

Provides 256 HDLC channels.

4.3.2.8 Interface of BSC and BSC by Ethernet Board (IBBE)

Interface of BSC and BSC by Ethernet (IBBE) board provides A3/A7 and A13 interfaces and processes bottom-layer protocols. It uses Ethernet as the bearer and implements soft handoff interface between IP BSCs.

IBBE2 is upgraded from and has the same software function as IBBE.

Following are the functions of the IBBE/IBBE2 board.





IBBE provides at most four external 100M Ethernet interfaces

while IBBE2 delivers four external FE interfaces or one GE interface (optical or

electrical).

4.3.2.9 Digital Trunking Board (DTB)

Digital Trunk Board (DTB) implements conversion between E1/T1 signals and HW signals, and multiplexes 32 E1s/T1s into eight 8 M HW signals. DTB sends eight 8 M HW signals to corresponding protocol processing board via UIM after circuit switching.

The functions of DTB board are:

Provides 32 E1/T1 interfaces.



Transmits inter-office Channel Associated Signaling (CAS) and Common Channel

Signaling (CCS).

Extracts 8 K synchronization clock from the line and sends it via clock cable to

CLKG board. CLKG board uses it as clock reference.

4.3.2.10 Sonet Digital Trunking Board (SDTB)

Sonet Digital Trunk Board (SDTB) provides 155 Mbps optical interfaces.

Following are the functions of the SDTB board.

Provides one standard 155 Mbps optical interface, supports SDH and Sonet modes.

Completes AU pointer processing and mapping/de-mapping of STM-1, STS-3 and

STS-3c signals.

Supports Channel Associated Signaling (CAS) and Common Channel Signaling

(CCS).

Provides sixteen 8 M HWs to adapt UIM board.

Outputs two 8 kHz differential synchronization clock signals to CLKG board which

uses them as clock references.

Communicates via FE interface with UIM board to transmit management, control

and software version information.

4.3.2.11 Voice Transcoder Card based on DSP (VTCD)

Voice Transcoder Card based on DSP (VTCD) is in the BSCB vocoder subsystem and implements voice coding/decoding of CS domain.

VTCD supports Voice over IP (VOIP), rate adaptation and echo cancellation.

Following are the functions of VTCD board.

Provides 100 M control flow Ethernet interface.

Provides 100 M media flow Ethernet interface.

Provides one RS485 backup control channel interface

Provides access ability of 8 M HW.

Provides vocoder functions with QCELP8K, QCELP13K and Enhanced

Variable Rate Coder (EVRC) and provides optional echo cancellation function.



Provides internal circuit switching function, and implements CS voice service

switching and free allocation of voice channels between output port and timeslots.

Provides internal Ethernet switching function, and implements free allocation and

centralized output of data packets and media flows between voice processing chips.

4.3.2.12 Narrowband Signaling Processing Board (SPB/SPB2)

SPB/SPB2 implements signaling process, processes several SS7

HDLC links and protocols below MTP-2, it also provides V5 signaling process, supports SS7 and V5 protocols simultaneously.

Following are the function of the SPB board.



Provides SS7 access and processing.

Supports V5 protocol process.

4.3.2.13 IP Narrowband Line Processor(INLP)

The INLP board is a logic board of SPB_2 physical board. It integrates 16 E1/T1 LIU and Framer and supports E1/T1 mode as well as long and short line modes. The matching resistance can be selected to configure by software in the transceiver chip: Under the E1 mode, supports 120 ohm and 75 ohm impedance configuration; Under the T1 mode, supports 100 ohm impedance configuration

4.3.2.14 InterWorking Function Board (IWFB)

IWF Board (IWFB) is an interconnection board between networks to implement asynchronous data service and G3 facsimile service.

Following are the functions of IWFB board.

When configured in BSC, provides asynchronous data service or G3 facsimile

service.

Provides timeslot circuit switching function (each board for 36 groups) and enables

timeslots free allocation between output port and internal processing boards to

transmit CS domain data.

Provides 1x100 M control flow Ethernet interface.

Provides 1x100 M media flow Ethernet interface.




4.3.2.15 Abis Ethernet Access (ABES/ABES2)

Abis Ethernet Access (ABES) board works as an IP processing board for Ethernet access of Abis interface. It can work in active/standby mode or no standby mode.

ABES2 is upgraded from and has the same software function as ABES.

ABES/ABES2 board separates Abis data and signaling. Signaling is transferred to BCTMP, CMP, SMP modules for further processing via control channel. As for Abis media plane data, pseudo Network Address Transfer (pNAT) and interior capsulation should be performed by ABES/ABES2, and then the data is forwarded within the network element. Multi ABES/ABES2 boards can be coexisting in one BSCB.

Following are the functions of ABES/ABES2 board.





ABES provides three FE interfaces to connect the external network. ABES2

provides four external FE interface or one external GE interface (optical or

electrical).

4.3.2.16 Signaling IP bearer Interface (SIPI)

SIPI board provides A1p interface between BSC and Mobile Switch Center emulation (MSCe).

Following are the functions of the SIPI board.





Provides at most four FE interfaces to connect the external network.



4.4 Control SubSystem (BCTC)

4.4.1 Overview

As the control core of the BSC, the control subsystem (BCTC) implements the management and control of the entire system and generates types of clocks.

4.4.2 Working Principle

The structure of the control subsystem is shown in Figure 11.

IBB CLKG

CMPCMP

OMPOMP

UIMUIM

F E

CLKG

8K、16M、PP2S

CHUB

OMM FE

Figure 10 BCTC Working Principle

As the signaling switching center of the control subsystem, the UIM implements the

message exchange between modules and provides control Ethernet channels for

externally connecting the resource shelf ;

The MP board is the communication and control center, and by the software

function, it falls into the CMP, SMP, OMP, RMP, DSMP, RPU, DOMP, DOBIMP,

and SPCF with the same hardware. The OMP module provides an OMM Ethernet

interface that is used for connecting with the background.

As the control and maintenance center of the BSC, the CHUB implements

convergence and management of the control flows of the resource subsystem,

level-1 switching subsystem and control subsystem;

As the clock unit of the BSC, the CLKG implements synchronization of the local NE

with that of the higher level and receipt/distribution of the GPS clock signals;

There can be one or more control subsystems according to the user capacity of the

BSC, but each NE should have only one pair of OMPs configured.




The control subsystem (BCTC) completes the signaling processing of the BSC system, including the CHUB, ICM/CLKG/CLKD, UIMC/UIMC2, MP/MP2 and BCTC backplane.

Upload various software to fulfill the following function modules on the MP/MP2 board: 1XCMP/APCMP/DOCMP/V5CMP/DSMP/RMP/SPCF/1XUMP/BCTMP/DOBICMP/EUMP.

The following describes functions of all boards and modules.

CHUB

The CHUB is used to expand the distributed processing platform. One pair or multi-pairs of CHUBs fulfill Ethernet Lay 2 switch of control flow message between boards.

ICM/CLKG/CLKD

The CLKG refers to the clock reference 8 k frame synchronization signal from the DTB, the 2 MHz/2 Mbits signal from the BITS or the 8 k clock signal from the GCM (PP2S/16 Chip), and synchronizes with the superior office. In addition, it provides 15 16.384MHz, 8KHz and PP2S clocks for the UIM/UIM2.

The CLKD is used to expand the clock system when there is over 15 shelves (including BUSN, BCTC and BPSN).

The ICM replaces functions of GCM and CLKG.

UIMC/UIMC2

The UIMC/UIMC2 is used to complete Ethernet switch of control flow message in the BCTC and BPSN.

1XCMP

The 1XCMP handles signaling on the MTP3 or above and 1x Release A call and handoff.

APCMP

The APCMP handles signaling on the SUA or above and call signaling of Ap interface.

DOCMP

The DOCMP handles 1xEV-DO call and handoff.

V5CMP

The V5CMP handles call signaling of V5 interface.

DSMP

The DSMP handles Layer 3 signaling and handoff originated by 1x Release A.

RMP



The RMP manages system resources, such as vocoders, selectors, CICs and DSMPs.

SPCF

The SPCF handles the packet service A9/A11 signaling.

1xUMP

The 1xUMP integrates functions of CMP, RMP and DSMP and is used for debugging

and demonstration services.

BCTMP

The BCTMP fulfills TCP termination. The retransmission agent process on the BCTMP

transmits signaling to the CMP in the mode of inter-board message and then handles

Abis signaling protocols.

DOBICMP

The DOBICMP, used in EVDO (Rev.A) BCMCS, completes broadcast protocol

processing.

EUMP

The EUMP, used in the MINI system, integrates functions of 1xUMP and DOCMP. Only the MP2 supports this module.

BCTC backplane

The BCTC backplane provides Ethernet access of 46x100 M +1x1000 M control flow. It receives clock from the CLKG/CLKD/ICM and transmits clock to the UIMC/UIMC2. The

UIMC/UIMC2 distributes the system clock to all service slots of BCTC through the BCTC backplane. In addition, it provides -48 V power for the BCTC.

For example, configurations of the control shelf are shown in the following Figure (CLKG configured).

Resource Shelf (BUSN)

1 2 3 4 5 6 7 8 9 10

11 12

13

14

15

16

17

M

P

M

P

M

P

M

P

M

P

M

P

M

P

M

P

U

I

M

C

U

I

M

C

O

M

P

O

M

P

C

L

K

G

C

L

K

G

C

H

U

B

C

H

U

B

N

C

Figure 11 Control Shelf (CLKG configured)

For example, configurations of the control shelf are shown in the following Figure (ICM configured).



Control Shelf (BCTC)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

M

P

2

M

P

2

M

P

2

M

P

2

M

P

2

M

P

2

M

P

2

M

P

2

U

I

M

C

U

I

M

C

O

M

P

2

O

M

P

2

I

C

M

I

C

M

C

H

U

B

C

H

U

B

N

C

Figure 12 Control Shelf f (ICM configured)

4.4.3.1 Main Processor (MP/MP2/MP3)

There are two Main Processor (MP) boards in ZXC10 BSCB; Main Processor (MP) board, Main Processor2 (MP2) and Main Processor3 (MP3) board. The differences between these boards are:

Subcard type of MP board is SCT_3G_PPC755, subcard type of MP2 board is SCT_3G_85XX. whereas subcard type of MP3 board is SCT_3G_8548.

Following are the functions of the MP/MP2 board.

Provides distributed processing of BSCB system. Connects various peripherals via

standard PCI bus to implement active/standby MP/MP2 changeover.

One MP/MP2/MP3 board consists of two CPU processors called CPU subcards.

CPU subcards work mutually independent. If MP/MP2/MP3 board is pulled out,

CPU subcards will be notified by hardware signal to shift to standby mode.

MP/MP2/MP3 board provides 1+1 backup, and load different software on CPU

subcards to perform different as functional modules.

4.4.3.2 Control Panel Ethernet Interconnection Board (CHUB/THUB)

In BSC, CHUB is used for the expansion of distributing processing platform. One pair or several pairs of CHUBs can achieve the mutual communication of control plane between service shelves. CHUB is connected with UIMC (backplane) inside the shelf through 1000 M electrical interface (backplane line connection).

Following are the functions of CHUB board.

Provides external interfaces: 46 control plane Ethernet interfaces.

Provides one 1000M control plane Ethernet interface through the rear board to

connect the UIMC module.

Supports 1+1 active/standby function.

THUB also achieves the cascade connection of control plane. Compared with CHUB, it can provide greater control plane communication bandwidth (at most 400Mbps). THUB



is mainly used for the control plane cascade connection of BGSN resource shelf, and used together with BGSN.

THUB provides the following functions:

External interface: 11 Trunk (4xFE) sets

External interface: connect with the backplane and UIMC through 1000 M control

plane Ethernet interface

1+1 active/standby

4.4.3.3 Clock Generator (CLKG)

CLOCK Generator (CLKG) board works in active/standby mode and uses 8 K frame synchronization signal from DTB or SDTB board, 2 MHz or 2 Mb signal from BITS system, and 8 K clock signal (PP2S and 16 CHIP) from GCM board as local clock reference. CLKG board provides loss-of-reference alarm signal.

The functions of CLKG board are:

Communicates with OMP/OMP2 board via RS485 bus.

Selects clock reference source by NetNumen M3 (ZXC10 BSSB) configurations or

manually, supports shielding manual changeover via software setting. Manual

reference order is:

2Mbps1 -> 2Mbps2 -> 2MHz1 -> 2MHz2 -> 8K1 -> 8K2 ->8K3 -> NULL.

Outputs fifteen 16.384 M, 8 K and PP2S clock signals to UIM.

Supports Clock loss and input reference degradation judgment.

Provides functions of Static Random Access Memory (SRAM)failure alarm, constant

temperature trough alarm, reference and output clock loss alarm, reference

degradation alarm, and reference frequency offset out-of-range alarm and PLL

phase discrimination failure alarm, which enables to determine CLKG board current

working status and locates the fault.

Provides frequency adjustment knob, and adjusts Voltage-Controlled Crystal

Oscillator (VCXO) frequency.

4.4.3.4 CLOCK Driver (CLKD)

CLOCK Driver (CLKD) board adopts hot active/standby design. Active/standby CLKD board receives the clock from active CLKG (CLKG clock is transferred via cable to the UIM board and UIM board forwards the clock to CLKD via backplane.

The clocks include PP2S, 8K _16M and 16M and provide 15 sets of system clocks (PP2S, 8K _16M and 16M) to resource subsystems via cable. Furthermore, this board



also provides 10 sets of clocks (32M, 8K _32M) to the boards in "T" network. It helps to extend the clock output from CLKG.

Following are the functions of CLKD board.

Active/standby switchover, command switchover, manual switchover, malfunction

switchover, reset switchover and so on.

Communicates with console (OMP/OMP2) via control plane Ethernet.

Receives PP2S, 16M_8K and 16M clocks from CLKG /ICM.

Output 15 channels of 16M, 16M_8 K and PP2S clock signals to Universal Interface

Module (UIM). Frequency doubler generates 10 channels of 32M and 32M_8K and

sends them to "T" network.

Clock input/output alarms are available. Working state and malfunction location can

be determined quickly according to these alarms.

ID identification is available.

Online download is available.

4.4.3.5 GPS Control Module (GCM)

GPS Control Module (GCM) receives GPS satellite signal or signals from Russia GLONASS timing system (GNS) satellite. GCM boards work in a 1+1 backup mode, occupy a 6U GCM shelf and adopt an independent Backplane of GCM (BGCM).

The functions of GCM board are:

Receives signal from satellite system, extracts and generates 1PPS signal and

relevant navigation messages, and generates

PP2S/16CHIP signal and relevant Time of Date (TOD) messages.

Provides mutual backup of circuit clocks and GPS clock.

Distributes 2 MHz and 8 KHz circuit clocks uniformly.

4.4.4 Integrated Clock Module (ICM)

Integrated CLK Module (ICM) provides synchronized clock, and realizing the functions of BITS clock access, line clock extraction, clock synchronized phase lock and clock distribution.

Following are the functions of the ICM board.

ICM board communicates with main control board OMP/OMP2 via FE or RS485 bus.



Active/standby changeover (command changeover, manual changeover, failure

changeover and reset changeover) is available.

Manual reference clock changeover and manual active/standby changeover are

available.

Manual reference selection sequence: Bps1 ® Bps2 ® Hz1 ® Hz2 ® 8K1® 8K2 ®

8K3 ® 8K4

Modify the constant temperature slot crystal oscillator and the software to choose

level 1 or level 2 as the output reference clock.

Powerful alarm report function helps to locate the problem in clock boards.

There is a frequency tuning knob. When the old quartz of VCXO causes the central

frequency distortion, tuning is available.

Provides 15 sets of system clocks (including PP2S, 8K and 16 M) for every

resource subsystems through cable transmission.

Provides 10 sets of clocks (8 K and 3 2M) for boards in T network.

4.4.5 Universal Interface Module (UIMC)

Refer to Section 4.3.2.5.

4.5 Clock Subsystem

The clock subsystem synchronizes internal BSC system clocks.

It consists of the GPS Control Module (GCM), Clock Generator Back GCM (BGCM).

The board functions are described below.

GCM

The GCM receives signals from satellite systems (GPS and GLONASS), and generates 1PPS signals and navigation messages. Then it generates PP2S, 16 CHIP and Time of Date (TOD) messages using 1PPS signals as phase-locked reference clock inputs to the BSC.

CLKG

The CLKG synchronizes with the superior-level clocks by using 8K synchronous frame signal clock reference from trunk boards, 2 MHz/2 Mb signal from BITS system, or 8 K clock (PP2S even-second pulse and 16 CHIP) from the GCM board.

ICM



The ICM replaces functions of GCM and CLKG boards.

CLKD

The CLKD implements clock system extension when the subrack number (including BUSN, BCTC and BPSN) is more than 15.

BGCM

The BGCM provide clock and RS485 interface. In addition, it serves –48V power

supply for the GCM subrack.

4.6 Power Distribution Subsystem

4.6.1 Overview

Power Distribution Subsystem consists of two boards: Power Distributor (PWRD) and Backplane of PWRD (PWRDB).

The functions of power distribution subsystem are:

Distributes –48 V power to other shelves.

Implements auto switching of two external power inputs for 1+1 power backup.

Provides power indication, environment monitoring and fan shelf monitoring.

4.6.2 Power Distributor (PWRD)

POWER Distributor (PWRD) Module is the main monitoring module in power distribution shelf.

PWRD board connects power supply, entrance control, smoke sensors, fan shelf and temperature and humidity sensors via monitoring cables. PWRD detects over voltage or under voltage, fan speed, environment temperature, environment humidity, smoke alarm, infrared alarm, and cabinet and room entrance control. PWRD Provides two channels of power voltage.



5 Technical Specifications

5.1 Running Environment Indices

5.1.1 Dimensions

The appearance of BSCB is shown in Figure 13.

Physical dimensions of a single rack are:

Type 1(Note that the side door is not detachable.): 2000 mm (78.74 inches) x 600 mm (23.62 inches) x800 mm (31.50 inches) (HxWxD).

Type 2(Note that the side door is detachable.): 2000 mm (78.74 inches) x 640 mm (25.20 inches) x 800 mm (31.50 inches) (HxWxD).

Figure 13 Color Picture of BSCB Rack

5.1.2 Gross Equipment Weight and Ground Bearing Capacity of the Equipment Room

The maximal weight of a single rack fully configured is 310 kg (683.42 pounds) .

The equipment room floor is required to have the bearing capacity of 450kg/m2 (92.16

pounds per square foot).

5.1.3 Working Voltage

A BSC adopts the -48 V DC power supply ranging from -18 V to -62 V.

5.1.4 Power Consumption

Average power consumption of the Level-1 switching shelf (BPSN): < 880 W;



Average power consumption of one control shelf (BCTC): < 600 W;

Average power consumption of one resource shelf (BUSN): < 600 W;

Average power consumption of one GCM shelf: < 60W.

5.1.5 Grounding Requirement

Joint grounding resistance: 1.

5.1.6 Temperature and Humidity

Table 1 Temperature and Humidity Requirements

Equipm

ent

Temperature Humidity

Working

Temperature

Working

Temperature

Recommended

Working

Humidity

Working

Humidity

Recommended

BSC -5 °C (23 °F) ~ 45 °C (113°F)

15 °C (59 °F) ~ 35 °C (95 °F)

15%RH ~ 93%RH

40%RH ~ 60%RH

5.2 Performance Indices

5.2.1 Interface Indices

The A1p/A2p interface supports the FE (10Mbps/100Mbps Ethernet electrical

interface) access.

A1/A2/A5 interfaces support the connection of E1, T1 and STM-1;

A3/A7 interfaces support the connection of E1, T1, FE, GE (1000Mbps Enternet

fibers interface) and STM-1;

A10/A11 interfaces support the connection of FE and GE;

Abis interfaces support the connection of E1, T1 ,FE, GE and STM-1;

A12 interfaces support the connection of FE and GE;

A13 interfaces support the connection of FE and GE;

Number of FE at A1p interface: 2;

Number of FE at A2p interface: 52;

Number of E1/T1 at A interface: 2,400;

Number of E1/T1 at Abis interface: 3,840.



Number of E1/T1 at FE interface: 285.

5.2.2 Capacity Indices

BHCA (Busy Hour Call Attempt): 4,700k;

Voice traffic volume: 50,000Erl;

Number of voice transcoders (BSCB of the A1/A2 interface) 50,400;

Number of sector carriers supported: 15,360;

Number of voice subscribers: 2,500k (0.02Erl/sub);

Number of packet data service active PPP connections: 120,000;

Total Throughput of packet data: 6Gbps;

Number of PPP connection subscribers: 6 million;

Number of the activated PPP subscribers: 120,000.

5.2.3 Clock Indices

Features of the GPS clock (GCM):

Clock reference source: 1PPS timing pulse signals output from the satellite receiver;

Working modes of the clock system: Fast capture, tracking, memory, free oscillation

The clock system provides the signal interface of the satellite receiver, and it can be accessed to the satellite receiver directly, meeting the Level 2 clock standard upon tracking GPS. The frequency accuracy of 10 MHz in the locked GPS status is better than the precision of 10

-10, and it is better than 10

-10 in the

maintained GPS module.

Phase error: In the locked GPS status, the phase error is smaller than 3US; the maintained GPS module status, the phase error within 72 hours is smaller than 10 us.

Features of circuit clock (CLKG)

Working modes of the clock system: Fast capture, tracking, memory, free oscillation

Circuit clock signal level: enhanced Level-3 clock.

Accuracy of frequencies in the free run mode: 4.6x10-6

(1 year);



Holdover: Longer than 1x10-9

Hz /day;

Pull-in range: 4.6x10-6

Hz .

5.2.4 Reliability Indices

Mean Time Between Failures (MTBF) (hour): > 200,000 hours;

Mean Time To Repair (MTTR) (in hour): 0.25 hours.

Availibility: >99.9999%



6 Operation and Maintenance

6.1 Overview

The OMM (Operation Management Maintenance) system is to provide the maintenance method with a means to ensure normal, highly efficient, reliable, economic and safe operations of the CDMA BSS. With the support of the DBS (DataBase Subystem), it conducts the central OAM and management of the CDMA BSSB, including the BSCB and BTSB. In addition, it supports the local OMM of the BTSB.

Architecture of OMM is shown as the Figure 14.

Ethernet

SQL

Data

ClientServer

BSCB BTSB

BSCB BTSB

BTS Local OMM

PSTN

Server

Client Client

BTS Local OMM

Figure 14 Architecture of OMM

OMM subsystem includes Server, Client and local OMM of BTS.

6.2 Function Description of OMM

It has the following functions:

Configuration management

It manages various configurations in the current BSS. Any change of the network/system/unit configurations occurred due to all the causes takes into effect



unless it is implemented through configuration management. The configuration management involves the physical resource, radio resource and SS7 configuration.

Performance management

It starts the performance measurement function of the BSS, collects/processes measured data, and implements necessary network management control activities according to the measurement result to improve overall performance of networks. It includes traffic and signaling performance measurement, service quality measurement, availability measurement, throughput measurement and handoff function measurement.

Fault Management

It falls into two parts, alarm management and diagnosis test. The alarm management function serves to receive the detailed alarm information sent from network units in the form of fault reports, and monitor the network status, such as the circuit group status, network node status, signaling system status and the MSC area, registration area and cell status. If any network abnormality is found, it will convert the information into audible, visual and screen display alarms to inform the operators. When an alarm occurs or the system performance becomes weak, the operator starts the corresponding test program to perform fault diagnosis and locating test, as a result, he/she can take proper maintenance measures to minimize the influence of the fault on the network operation. For on-site replaceable component modules, the fault cannot be located on more than three modules in terms of precision. The diagnosis test may be the board test and inter-module communication link test.

Security management

It prevents unauthorized persons from conducting deliberate or indeliberate damages and modification via the background maintenance interface, and conducts necessary restriction on the operation rights of the operator through different operation levels. After the restriction operation, it integrates with the OS right management, thus constructing the entire security system. It also contains the log management module, for the afterwards analysis and location of the security problems.

System tools

It includes the dynamic data management, service observation, serve database monitoring program, data backup recovery tools and report tools, which provide substantial suggestions for system optimization, thus achieving a good maintenance effect by obtaining twice the result with half the effort.

6.3 Remote OMM

OMM supports multiple remote OMM modes, including E1, DDN (Digital Data Network), PSTN, and X.25.

It supports either a single networking via E1/DDN/PSTN/X.25 or hybrid networking.



E1/PSTN/DDN/X.25

OMM

ServerClient Client

LAN

Remote OMM

Figure 15 Networking Modes of remote OMM

6.4 Networking Modes of OMC

There are two networking modes for the OMC (Operation Maintenance Center) according to the actual NE quantity: 3-layer and 2-layer network structures. Of them, the 3-layer structure is adopted upon requiring a great amount of NEs while 2-layer one upon fewer NEs.

Figure 16 3-Layer Networking Structure of the OMC

The 3-layer networking architecture of the OMC is shown in Figure 15. The OMC is composed of NE operation and maintenance (OMM), local-level OMC (LOMC), and



provincial level OMC (POMC).The LOMC and POMC can be the centralized NM points, which is to say that the OMC_R (OMC for Radio side) and OMC_S (OMC for Switch side) can be integrated or independently exist. The LOMC can manage about ten NEs (one NE (Network Element) corresponds to an OMM) while the POMC about 40 NEs.

The 2-layer networking structure can be adopted when constructing a POMC with fewer NEs. As shown in Figure 16, the LOMC is omitted and the POMC is constructed directly from the OMM.

Figure 17 2-Layer Networking Structure of the OMC



7 Appendix A: Standard Complied

7.1 Primary Standards

3GPP2 A.S0011-C (IOS v5.0): Interoperability Specification (IOS) for CDMA2000

Access Network Interfaces- Part 1 Overview.


Access Network Interfaces- Part 2 Transport.


Access Network Interfaces- Part 3 Features.


Access Network Interfaces- Part 4 (A1, A1p, A2, and A5 Interfaces).


Access Network Interfaces- Part 5 (A3 and A7 Interfaces)


Access Network Interfaces- Part 6 (A8 and A9 Interfaces).


Access Network Interfaces- Part 7 (A10 and A11 Interfaces).

3GPP2 A.S0001-A version 2.0 (3G-IOS v4.1): Interoperability Specification (IOS) for

cdma2000 Access Network Interfaces.

3GPP2 A.S0011-A v1.0 (IOS v4.3): Interoperability Specification (IOS) for

cdma2000 Access Network Interfaces.

3GPP2 C.S0001-A version 5.0: Introduction to cdma2000 Standards for Spread

Spectrum Systems - Release A.

3GPP2 C.S0002-A version 6.0 (TIA/EIA IS-2000.2-A-2): Physical Layer Standard

for cdma2000 Spread Spectrum Systems - Release A.

3GPP2 C.S0003-A version 6.0 (TIA/EIA IS-2000.3-A-2): Medium Access Control

(MAC) Standard for cdma2000 Spread Spectrum Systems - Release A, Addendum

2.

3GPP2 C.S0004-A version 6.0 (TIA/EIA IS-2000.4-A-2): Signaling Link Access

Control (LAC) Specification for cdma2000 Spread Spectrum Systems - Release A.



3GPP2 C.S0005-A version 6.0 (TIA/EIA IS-2000.5-A-2): Upper Layer (Layer 3)

Signaling Standard for cdma2000 Spread Spectrum Systems - Release A,

Addendum 2.

ANSI J-STD-008, Personal Station-Base Station Compatibility Requirement for 1.8

to 2.0 GHz Code Division Multiple Access (CDMA) Personal Communications

Systems, 1996.

TIA/EIA/TSB-58, Administration Parameter Value Assignments for TIA/EIA

Wideband Spread Spectrum Standards, 1995.

TIA/EIA/TSB-74, Support for 14.4 Kbps Data Rate and PCS Interaction for

Wideband Spread Spectrum Cellular System, 1995.

TIA/EIA/IS-95-A, Mobile Station-Base Station Compatibility Standard for Dual-Mode

Wideband Spread Spectrum Cellular Systems.

TIA/EIA/IS-95, Mobile Station-Base Station Compatibility Standard for Dual-Mode

Wideband Spread Spectrum Cellular Systems.

TIA/EIA/IS-637, Short Message Services for Wideband Spread Spectrum Cellular

Systems, 1997.

TIA/EIA/IS-127, Enhanced Variable Rate Codec Speech Service Option 3 for

Wideband Spread Spectrum Digital Systems, 1996.

TIA/EIA/IS-634A, MSC-BS Interface for Public Communications Networks, 1998.

TIA/EIA/IS-658, Data Service Interworking Function Interface for Wideband Spread

Spectrum Systems.

CDG RF36, Markov Service Option for Wideband Spread Spectrum

Communications Systems.

TIA/EIA/IS-725, Over-the-Air Service Provisioning of Mobile Stations in Wideband

Spread Spectrum Systems, 1997.

TIA/EIA/IS-728, Inter-System Link Protocol.

TIA/EIA/IS-733, High Rate Speech Service Option 17 for Wideband Spread

Spectrum Communication Systems.

TIA/EIA/IS-707, Data Service Options for Wideband Spread Spectrum Systems,

1998.

TIA/EIA/IS-707-A-2 Data Service Options for Spread Spectrum Systems Addendum

2, 2000.



ITU-T Q.714 Signaling connection control part (SCCP).

ITU-T Q.704 Signal link (MTP3).

ITU-T Q.703 Signal link (MTP2).

3GPP2 C.S0024-A (TIA/EIA IS-856-A): cdma2000 High Rate Packet Data Air

Interface Specification

3GPP2 C.S0024-B (TIA/EIA IS-856-B): cdma2000 High Rate Packet Data Air

Interface Specification

3GPP2 C.S0024 (TIA/EIA IS-856): cdma2000 High Rate Packet Data Air Interface

Specification

3GPP2 A.S0008 (TIA/EIA IS-878), IOS Specification for High Rate Packet Data

(HRPD) Radio Access Network Interfaces.

3GPP2 A.S0008-A, Interoperability Specification (IOS) for High Rate Packet Data

(HRPD) Radio Access Network Interfaces With Session Control in the Access

Network.

3GPP2 A.S0008-B, Interoperability Specification (IOS) for High Rate Packet Data

(HRPD) Radio Access Network Interfaces With Session Control in the Access

Network.

3GPP2 C.S0029: Test Application Specification (TAS) for High Rate Packet Data

Air Interface.

3GPP2 C.S0032, Recommended Minimum Performance Standards for cdma2000

High Rate Packet Data Access Network, January 2004.

3GPP2 C.S0010-A (TIA-97-D), Recommended Minimum Performance Standards

for cdma2000 Spread Spectrum Base Stations, March 2001.

3GPP2 C.S0054-A, cdma2000 High Rate Broadcast-Multicast Packet Data Air

Interface Specification.

3GPP2 C.S0063-0, cdma2000 High Rate Packet Data Supplemental Services

3GPP2 C.S0063-A, cdma2000 High Rate Packet Data Supplemental Services

7.2 Lightning Protection

IEC 61312-1 (1995) Protection against Lightning Electromagnetic Impulse Part I:

General Principles.



IEC 61643-1 (1998) Surge Protective devices connected to low-voltage power

distribution systems.

ITU-T K.11 (1993) Principles of Protection against Overvoltage and Overcurrent.

ITU-T K.27 (1996) Bonding Configurations and Earthing Inside a

Telecommunication Building.

ETS 300 253 (2004) Equipment Engineering; Earthing and bonding of

telecommunication equipment in telecommunication centers.

7.3 Safety

GB 4943-2000: Safety of information technology equipment.

IEC 60950 Safety of information technology equipment including Electrical Business

Equipment.

IEC 60215 Safety requirement for radio transmitting equipment.

CAN/CSA-C22.2 No 1-M94 Audio, Video and Similar Electronic Equipment.

CAN/CSA-C22.2 No 950-95 Safety of Information Technology Equipment Including

Electrical Business Equipment.

UL 1419 Standard for Professional Video and Audio Equipment

73/23/EEC Low Voltage Directive.

UL 1950 Safety of Information Technology Equipment Including Electrical Business

Equipment.

IEC60529 Classification of degrees of protection provided by enclosure (IP Code).

GOST 30631-99. General Requirements to machines, instruments and other

industrial articles on stability to external mechanical impacts while operating.

GOST 12.2.007.0-75. Electrotechnical devices. The general safety requirements.

7.4 EMC

CISPR 22 (1997): Limits and methods of measurement of radio disturbance

characteristics of information technology equipment.

EN 301 489-1 Part 1:Common technical requirements.



IEC 61000-6-1: 1997: Electromagnetic compatibility (EMC) - Part 6: Generic

standards - Section 1: Immunity for residential, commercial and light-industrial

environments.

IEC 61000-6-3: 1996: Electromagnetic compatibility (EMC) - Part 6: Generic

standards - Section 3: mission standard for residential, commercial and light

industrial environments.

IEC 61000-4-2 (1995): Electromagnetic compatibility (EMC) - Part 4: Testing and

measurement techniques - Section 2: Electrostatic discharge immunity test.


measurement techniques - Section 3: Radiated, radio-frequency electromagnetic

field immunity test.


measurement techniques - Section 4: Electrical fast transient/burst immunity test.


measurement techniques - Section 5: Surge immunity test.


measurement techniques - Section 6: Immunity to contacted disturbances, induced

by radio frequency fields.

ITU-T Recommendation K.20: Resistibility of Telecommunication Switching

Equipment to Overvoltages and Overcurrents.

GOST R 51318.22-99: Electromagnetic compatibility of technical equipment. Man-

made noise from informational equipment. Limits and test methods.

GOST 30429-96: Electromagnetic compatibility of technical equipment. Man-made

noise from equipment and apparatus used together with service receiver systems of

civil application. Limits and test methods.

7.5 Environment

GB 4208 Degrees of protection provided by enclosure (IP code).

GB 4798 Environmental conditions for electrician and electronic products

application.

IEC 60529 "Degrees of protection provided by enclosure (IP code)"

IEC 60721-3-1: Classification of environmental conditions- Part3: Classification of

groups of environmental parameters and their severities-Section 1: Storage.



IEC 60721-3-2: Classification of environmental conditions- Part3: Classification of

groups of environmental parameters and their severities-Section 2: Transportation.

IEC 60721-3-3 (1994): Classification of environmental conditions - Part 3:

Classification of groups of environmental parameters and their severities - Section 3:

Stationary use at weather protected locations.

ETS 300 019-2-1: Equipment Engineering (EE); Environmental conditions and

environmental tests for telecommunications equipment; Part 2-1, Specification of

environmental tests Storage.



environmental tests Transportation.



environmental tests Transportation Stationary use at weather-protected locations.

IEC 60068-2-1 (1990): Environmental testing - Part 2: Tests. Tests A: Cold.

IEC 60068-2-2 (1974): Environmental testing - Part 2: Tests. Tests B: Dry heat.

IEC 60068-2-6 (1995): Environmental testing - Part 2: Tests - Test Fc: Vibration

(sinusoidal).

GOST 15150-69: Machines, instruments and other industrial articles. Applications

for different climatic regions. Categories, operating, storage and transportation

conditions in compliance with the environmental factors.

GOST 23088-80: Electronic equipment. Requirements to packing and transportation

and test methods.



8 Appendix B: Abbreviation

Table 2 abbreviation

Abbreviation Full Name

1PPS One Pulse Per Second

1X EV 1X Evolution

1X EV-DO 1X Evolution Data Only

1X EV-DV 1X Evolution Data & Voice

3GPP2 3rd Generation Partnership Project 2

AAA Authentication, Authorization , Accounting

AAL ATM Adaptation Layer

AAL2 ATM Adaptation Layer type 2

AAL5 ATM Adaptation Layer type 5

ABES Abis Ethernet Solution

ABPM Abis Process Module

AN Access Network

AT Access terminal

ATM Asynchronous Transmission Mode

BCMCS Broadcast-Multicast Service

BCTC Backplane of ConTrol Center

BCTMP BSC Control plane Transmit Main Processor

BHCA Busy Hour Call Attempt

BPSN Backplane of Packet Switch Network

BSC Base Station Controller

BSCB Type B BSC

BSS Base Station System

BSSB Type B BSS

BTS Base Station Transceiver

BTSB Type B BTS

BUSN Backplane of Universal Switching Network

CAS Channel Associated Signaling

CCS Common Control Signaling

CHUB Control HUB

CLKD CLOCK Distributor

CLKG CLOCKGenerator




CMP Control Main Processor

CN Core Network

CS Circuit Switch

DBS DataBase Subystem

DDN Digital Data Network

DTB Digital Trunking Board

DTMF Dual Tone Multiple Frequency

DV Data & Voice

EMC Electronic Magnetic Compatibility

EPLD Erasable Programmable Logic Device

EVRC Enhanced Variable Rate Code

FA Foreign Agent

FCH Fundamental Channel

FE Fast Ethernet

FPGA Field Programmable Gate Arrays

GCM GPS Control Module

GE Giga Bit Ethernet

GLI GE Line Interface

GLIQV GLI Quad Vitesse

GLITV GLI Ten Vitesse

GOTA Global Open Trunking Architecture

GPS Global Positioning System

GTS GE 1000BASE-T Subcard

GXS GE 1000BASE-X Subcard

HA Home Agent

HDLC High-level data link control

HGM HIRS Gate Module

HIRS High-speed Interconnect Router Subsystem

HW High Way

IBBA Interface of BSC and BSC by ATM

IBB Interface of BSC and BSC

IDE Integrated Drive Electronics

IP Internet Protocol

IPCF Interface of Packet Control Function

IPI IP bearer Interface

IPSec IP Security

IWF Inter-Working Function

IWFB Inter-Working Function Board




LOMC Local OMC

MAC Media Access Control

MNIC Multi-service Network Interface Card

MP Main Processor

MS Mobile Station

MSC Mobile Switch Center

MTBF Mean Time Between Faults

MTTR Mean Time To Recovery

NAT Network Address Translation

NC Null Connection

NE Network Element

OAM Operation & Maintenance

OMC Operation Maintenance Center

OMC_R OMC for Radio side

OMC_S OMC for Switch side

OMM Operation Management Maintenance

OMP Operation & Maintenance Processor

PCF Packet Control Function

PCM Pulse Code Modulation

PDSN Packet Data Serving Node

POMC Provincial OMC

PP2S Pulse Per 2 seconds

PPP Point To Point Protocol

PSN Packet Switch Network

PTT Push To Talk

PWRD Power Distributor

PWS Power System

QCELP Qualcomm code excited linear prediction

QOS Quality of Service

RAN Radio Access Network

RC Radio Configuration

RFS Radio Frequency Subsystem

RLP Radio Link Protocol

SCH Supplemental Channel

SDH Synchronous Digital Hierarchy

SDTB Sonet Digital Trunk Board

SDU Selection/Distribution Unit

SIPI Sigtran IP bearer Interface




SPB Signaling Process Board

SPCF Signal plane of PCF

SSD Shared Secret Data

STM-1 Synchronous Transfer Mode I

TDSO Test Data Service Option

TOD Time of Date

UATI Unicast Access Terminal Identifier

UIM Universal Interface Module

UPCF User plane of PCF

UPDC User Plane of PTT Dispatching Client

USB Universal Serial Bus

VLAN Virtual LAN

VTCA Voice Transcoder Card (ASIC)

VTCD Voice Transcoder Card (DSP)

WMAN Wireless Metropolitan Area Network