2008-6-1

1

0

软交换应用的探讨

赵慧玲

2004年05月

Network Evolution & ConvergenceBy Huiling Zhao

Chairperson of Network & Switching Technical Committee, CCSA

May. 2008

2008-6-1

2

1

中国电信目标网络转型需求

Customer demandsService area

Product systemIndustry chain

Operation ViewBenchmark View

Technology ViewService View

IT technology

IP technologyAccess and transporttechnology

Network resource and service capabilities

Network architecture

Technology applications

Analysis of Network Evolution Demands

Demands of Network Evolution

2008-6-1

3

2

Service View & Technology View

nCustomers demand for diversified services.

nService focus shifts from the basic communication service to the converged information services (Internet, video, ICT and FMC).

nSeamless services experience –convergence services

IT technology Data convergence

IP technology

Access and transport

technology

VDSL2

Wimax/WiFi

ASON

40G WDM

Distributed architecture

Web2.0：SOA/open API

IPv6：

Router trunking,40G/100G high-performance interface

PONIT technology

IPtechnology

Access and transport technology

2008-6-1

4

3

Data Convergence

nData convergence helps the fast deployment of services and provision of converged services. üData convergence is realized through centralized database in thefuture telecom network.

Case study: -Skype，MSN and Google nMSNüCentralized deployment of login servers ( data convergence for user registration

information)üDistributed deployment of data servers (notification server, window server)

n SkypeüCentralized deployment of login servers ( data convergence for user registration

information)üDistributed deployment of super nodes( routing function)

n Googleü Cluster, a distributed computer system( multiple PCs , with strong scalability; low

cost of hardware )

2008-6-1

5

4

WiMAX ADSL3G

Service network

Base network

Network Architecture Studyn IT-based services and IP-based bearer are the trends of network evolution

nWe need to re-consider the network architecture in line with the development of multiple information services so as to support the provision of integrated information services.

ITU-T NGN SystemPrevious NGN Layers

PSTN PHS MSC Soft switch

Future telecom Network Layers

Service network (service capability, service control and service management platform, etc.)

Base network (IP bearer, transmission and access)

Access layer

Transmissionlayer

Control layer

IP bearer

Service layer

2008-6-1

6

5

Service NetworkService network is the one based on the base network and composed of various service platforms. The service network can either directly provide core applications or open its service capability for self operation or third party applications.

Service network is composed of service management, service capability, capability opening, data management and service control, with its overall architecture shown below:

Service network is composed of

multiple service platforms and

should be treated in a systematic way.

Service control

Service capability

Opening of service

capabilityService

management

User data

Functions such as registration, certification and authentication,

service triggering, signaling interoperation, session control and

control of media resources

Management of users ’service data (not only the users of core networks)

Standardized configuration,

deployment and

management of service

capability platform;

CP/SP management

Provide opening capability interface and CP/SP access

voice, messages, video, resources and information

Reference architecture：SDP、ITU-T

Service Netw

ork1

2008-6-1

7

6

Designing Principles of Service Network

“Four Principles”:

unified, open, horizontal

and converged

customer-centric

OverallArchitecture

Of Service Network

TechnologyDevelopment

OfServiceNetwork

DesignPrinciples

For Servicenetwork

Designing principlesDesigning principles Unified n Unified user data management

n Unified service management

n Unified CP/SP service access

n Unified payment/recharging,

content center, etc.

Openn Service capability open to third

party

n Service capability open to users

Horizontaln Define and build cross-network

and cross-terminal service capability which can be shared and re-used; build diversified applications based on universal service capability portfolio.

Convergedn FMC (including service

capability, service management and control, user service data, etc.)

n Internet/Telecom

Improve customer experience (unified portal, unified customer end, unified certification and authentication, unified re-charging and payment … )

Service network is composed of service platforms. Design of software system determines the network scalability and difficulties in consolidating and renovating the service networks, which influences the realization of unified, open, horizontal and converged service networks.

2008-6-1

8

7

General Principles of Base Network Design

OverallArchitecture

Of Basic

Network

TechnologyDevelopment

Of Basic

Network

DesignPrinciples

Design IdeaDesign Idea IP-based service bearer

nDual backbone plane CN2 (high quality VPN )and ChinaNet (public internet access)

nBy 2010, Accelerated replacement of copper with optical cables enables the increase of downlink bandwidth for high-end customers from 20M .

Integrated broadband access

nIntegrated service carrier over broadband access network;

nFlexible wireline and wireless access, hot spot wireless coverage;

Flat network structure

nReduce the service bearer layers, simplify the layer structure, improve network efficiency and save network cost;

n Increase network capability, broadly use 40G WDM links, and improve the link transport efficiency

Differentiated bearer service

n Intelligent bearer layer control;

n Support user-based and service -based differentiated bearer service; ensure on-demand priority；

n Provide end-to-end and high-quality bearer service as required by the user services

Basic principles

2008-6-1

9

8

One home——home subscribers

nIntegrated services based on fixed telephone, xDSL/LAN

üTelecommunication— VOIP— Broadband AccessüE-entertainmentüE-information

2008-6-1

10

9

One Home-HGW Customization

hardware：uplink：ADSL2+/LAN；downlink：4 LAN＋WiFi＋USBfunction：multi-terminal access，internal internetworking，UPnP，Service classification，Customer Service，TR-069 Mgt.，QoS，Firewall..

e8 series

e8-B

e8-C

hardware： e8-B+VoIP＋downlink POTSfunction：e8-B＋VoIP

ð 2 types(e8):e8-B and e8-Cð External networking：Access to Broadband network,Service

network,and Integrated terminal management system (ITMS)ð Internal networking:connecting various application terminals,such as:

PSTN Phone、PC、 IPTV STB、VoIP terminals

2008-6-1

11

10

One Home Framework

Home netwoerk

HGW

Broadband

3G/PHS

network

Videoconferencing

VoIP

IPTV

VAS

Service platform

ITMS

Equipment Mgt.

System Mgt.Schedule Mgt.

WLAN/LAN

BOSS

SS

…

Customer serviceBilling

Accounting

SerciceLaunchment

External Interface

Customer ServiceCenter

Service Hall

OnlineService

Hall

2008-6-1

12

11

Application Scenarios

IPTV

Home Monitoring

e-Entainment VoIP e-Information

IPTV

Home Portal VoIP

Wire/wireless Broadband Access

Soft terminal

IP

PSTNBroadbandＩＰ

ITMS

SSDDNS(dynamicdomain name

system)

WiFi handset

HGW

2008-6-1

13

12

BizNavigator——Enterprise subscribers

nMain ServicesüCommunication service: Super Handless Phone、color Ring、SMS、Call conference,etc.üInformation service：Broadband Access/Network security、IPVPN、Network Fax、Mail Box、Mega Eyes(全球眼)üTrade service：industry and commerce、Medical treatment、Education、E-government、Hotel、Police，etc.

2008-6-1

14

13

BizNavigator – Small Medium/VIP Enterprise

•Biz gateway centered Biz Broadband •IPsec VPN/Firewall/DDNS•Voice,Data,Internet bundling and packaging Services

Navigator

Vertical Market

•Medical/Education/Tax industry•Video Cam for vertical market •e-Government/e-Transportation

ICT

•PSTN, WEB 114•Flight, Hotel, etc. Booking 114 extension services•Enterprise apps (OA, efax, Data Security, Collaboration)

2008-6-1

15

14

BizNavigator – SME Navigator Practice

Outb

ound I

nte

rface

Outb

ound I

nte

rface

CRM

10000

NOC

Navigator TR-069pass-through

Element Mng.

Fault Mng.

Operators

BizNavigator Platform(OA, efax, Webmail,Data Storage)

NavigatorManagementSystem

VOIP

STB

Terminals

Provisioning

Inbound I

nte

rface

Inbound I

nte

rface

2008-6-1

16

15

BizNavigator – SME Navigator Practice

Enhanced Biz Broadband

• Customerized Broadband Usage Report

• Timely network monitoring/troubleshooting

• Converging TR069 and SNMP Configuration and Performance Capabilities

Ma

intena

nce

Ap

plic

atio

ns

• xDSL/LAN/Leased Line/Fibre Access• Enterprise Portal for bizBox• Widespread IPsec VPN• Multiple application terminals (STB,

NAS, Video Phone, Video cam etc.)• Enterprise Voice/Video/bundle

applications

Diversified Enterprise Apps

• Enterprise OA/SMS/efax• Enterprise data security• Collaboration apps• Unified communications

• Enterprise application hosting• Outsourcing• Valued added IDC services

2008-6-1

17

16

BestTone – a Voice Search Engine and INFO service

Inquirer：people use BestTone by dialing the best known number in China - 114 to inquire information of daily life, like “where to buy sushi nearby”…

businessBestTone Center Inquirer

I want know… … ..

I want people to kown my business and contact me easily… … ..

Business：post business information with phone num on BestToneplatform and pay to get a privileged recommendation.

114 or 118114

2008-6-1

18

17

Buz ad on the phone

lBuz name-card

lBuz ad lGuaidanceservice

l…

Commuassistance

lPersonal communication assistant

lSwitchboardservice for enterpriselSwitchboardservice for household

Buzrecommendation

lPriority recommend

lBrand name for inquiry

lMulit-name for inquirylTemporary number for inquiry

Travel booking service

lTickets bookinglHotel bookinglRestaurant bookinglBusiness traveling managementl…

lStatistics & analysis of inquiries for registered buz customers

lStatistics & analysis of inquiry behavior of registered BestTone users

Additional service

Inquiry transferring

lInquiry forwarding

lSMS sending

lCall forwarding

l…

BestTone Service System

2008-6-1

19

18

Unified/Converged Communication Solutions To Provide Converged Communication Services

Diversified terminals, multiple accesses, unified customer experience

TG

PSTNPSTN

control

User database

Video Conf.capability platform

Video monitoringcapability platform

Video Comm.capability platform

SP/CPcapability platform

IMcapability platform

VOIPcapability platform

Collaborated office

capability platform

Othercapability platform

Operation and support system

TerminalTerminalTerminal

Core network Core network Core network

Service platform Service platform Service platform Support levelSupport levelSupport level

SIP(SS)

SIP(SS) / ISC(IMS)

H.248

SS7

SIP(IMS)

HTTP

Services: voice, IM, video , data, etc.

Network: development of network and service capability to lay down the foundation for FMC

Technology: to study on service interface and opening mode of telcos

2008-6-1

20

19

CCSA –UC work

n Requirement of UC

n Reference Model of UC

n Service Interfaces ( e.g IM )

n Requirement of UC Service capabilities

n Requirement of UC Network capabilities

n Requirement of UC Terminal capabilities

2008-6-1

21

20

Existing network

China Telecom Network Evolution

POTS/ISDN PCPHS SIP softterminal

SIP hardware terminal

POTS/ISDN

PCPHS Multi-mode terminal

HomeGW

SIP Hardware terminal TV

WiMAX WLAN3GDSL FTTX

convergent serviceproviding platform

Integrated Service Management Platform

Customer differentiated portal Service

network

Core control network

IP bearer network

Trans-mission network

Convergent user database

PSTN PHS

CDN

•Managed network•Bearing Multi-service•IPv6

•User Identification•Differentiated service•Controlled quality

PSTN PHS

ChinaNetCN2

SoftSwitch

MAN

Transmission network

IN IVR ChinaVnet

Interprovincial / provincial/local

network

nUnified service platform

nStop Circuit SwitchingnDevelop SoftSwitch step by stepnIntroduce IMS at right time

§Improve differentiated bearer capability

nIntroduce ASON at right timenIntroduce ULH WDM and 40Gb/sWDM

•Perfect WDM structure•ASON•Speed service recover ability

Future Network

Soft-switch

IMS MobileR4

2008-6-1

22

21

Converged and diversified information services

FTo build the service network of telcos

FTo build the unified and converged network service management platform for different customer segments, enhance service capability (voice, messages, video, resources and information services) and support the operation of Internet video and audio applications, multimedia communications, Best tone and other media and information services;

FTo build up the service opening environment for the telcos (to provide API and SDK) and to expand the value chain cooperation

FTo provide converged service and data opening through unified user data view

Converged and diversified information services

FTo build the service network of telcos

FTo build the unified and converged network service management platform for different customer segments, enhance service capability (voice, messages, video, resources and information services) and support the operation of Internet video and audio applications, multimedia communications, Best tone and other media and information services;

FTo build up the service opening environment for the telcos (to provide API and SDK) and to expand the value chain cooperation

FTo provide converged service and data opening through unified user data view

Summary of Future Telecom Network

Differentiated network capability

Øsecure, reliable and integrated service bearer with large capacity and high bandwidthØSupport of wire line and wireless

broadband accessØTo provide end-to-end differentiated

bearer services

Differentiated network capability

Øsecure, reliable and integrated service bearer with large capacity and high bandwidthØSupport of wire line and wireless

broadband accessØTo provide end-to-end differentiated

bearer services

Future Network during the Telecom

Transformation

To improve network operation efficiency

üService network: flat and converged architecture, capability sharing of voice, video, messages, information and resource services and centralization of service, user and content managementüBase network: IP-based, flat, intelligent, best use of network resources and improvement of operational efficiency

2008-6-1

23

22

Thoughts and Suggestions

nWe should give high priority to the management of user data (applications, services and networks).

nAttention should be paid to the service network which is the key part of integrated information service provision.

nSome service interface e.g UC need to be studied .

2008-6-1

24

23