Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch...

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xiecf xiecf Development Scenario of SoftSwitch Development Scenario of SoftSwitch Standards in China and China Telecom Standards in China and China Telecom s s Considerations on Network Evolution Considerations on Network Evolution Ms. Zhao Ms. Zhao Huiling Huiling Chairperson of the Network and Switching Chairperson of the Network and Switching Technical Committee of CCSA Technical Committee of CCSA Vice President, Beijing Research Institute of China Vice President, Beijing Research Institute of China Telecom Telecom

Transcript of Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch...

Page 1: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

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Development Scenario of SoftSwitch Development Scenario of SoftSwitch Standards in China and China TelecomStandards in China and China Telecom’’s s

Considerations on Network EvolutionConsiderations on Network Evolution

Ms. Zhao Ms. Zhao HuilingHuiling

Chairperson of the Network and Switching Chairperson of the Network and Switching Technical Committee of CCSATechnical Committee of CCSA

Vice President, Beijing Research Institute of China Vice President, Beijing Research Institute of China TelecomTelecom

Page 2: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

China Telecom Beijing Research Institute 2xcfhttp://www.ctbri.com.cn

Outline

SoftSwitch Standards Development in CCSA

China Telecom’s Considerations on Network Evolution

Page 3: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

China Telecom Beijing Research Institute 3xcfhttp://www.ctbri.com.cn

Development of SoftSwitch Industrial Standards

CCSA started to develop specifications and standards related to softswitch network in 2001, which include:

Network equipment specifications and relevant testing specificatNetwork equipment specifications and relevant testing specificationsionsNetwork protocol specifications and relevant testing specificatiNetwork protocol specifications and relevant testing specificationsonsSoftswitchSoftswitch--based interface specifications and relevant testing specificatiobased interface specifications and relevant testing specificationsnsAccess equipment and terminals specifications and relevant testiAccess equipment and terminals specifications and relevant testing ng specificationsspecificationsSoftswitchSoftswitch--based access management specifications and relevant testing based access management specifications and relevant testing specificationsspecificationsService architecture/API/service classification and general requService architecture/API/service classification and general requirementsirements

CCSA has published 59 series of softswitch specifications up to now.

Page 4: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

China Telecom Beijing Research Institute 4xcfhttp://www.ctbri.com.cn

SoftSwitch Functional Architecture

App. Server

Service Provision

Call control

SSF

H.323

SoftSwitchSIP/BICC

SIPTerminal

H.248

INAP/IP

To be decided

NMS ServerAAA Server

Radius SNMP

Service creation APIs

Signaling Gateway

Signaling Gateway Current IN

H.323/IP TelephoneSS7/IP

SIP SystemSIP

Network Management, Billing

Address Resolution/Routing

Inter

worki

ng F

uncti

on

SoftS

witch

devic

e

NO.7

MediaGateway

H.248Terminal

MGCPTerminal

Page 5: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

China Telecom Beijing Research Institute 5xcfhttp://www.ctbri.com.cn

Delivery of NGN Services

From

Service point of view

From

Service point of view

PSTN /ISDN Emulation Service

Other IP

Netw

orks

IP Transport (Access and Core)

T-MGF

I-BGF

AS

UPSF

P-CSCF

I/S-CSCF

BGCF

SLF

ChargingFunctions

IWF

« Core IMS »

Mw

Mw/Mk/Mm

Mr

Mg

Mj

Mi

Mp MnGm

Gq'

ISCCx Dx

DhSh

Ic

Rf/Ro

Rf/RoIb

Iw

Gq'

PS

TN/IS

DN

SGFMRFC MGCF

MRFP

Resource and Admission Control Subsystem

Network Attachment Subsystem

e2

Ie

MwIBCF

Mk

Mk

UE

Ut

UPF

AGCF MRCF MGCF

ASF(may include own Authentication, Authorization and Accounting)

RF

SPF

RACF

AMGFLegacyteminal

Packet TransportFunctions

ABGF

TMGF

MRPFSGF

PSTN/ISDN

Netw

ork Border

PGCF

PGFI1

I2

I4

I5

I6 I7

I8

I9

I14

I3

I12

I11

I13

CCF

SSF

SIF

I10Other IP MM

eg:IMSI15

I9I10APL GW

Other PESUPF

AGCF MRCF MGCF

ASF(may include own Authentication, Authorization and Accounting)

RF

SPF

RACF

AMGFLegacyteminal

Packet TransportFunctions

ABGF

TMGF

MRPFSGF

PSTN/ISDN

Netw

ork Border

PGCF

PGFI1

I2

I4

I5

I6 I7

I8

I9

I14

I3

I12

I11

I13

CCF

SSF

SIF

I10Other IP MM

eg:IMSI15

I9I10APL GW

Other PES

PSTN /ISDN Simulation Service

IP Multimedia Service

CS basedCS based IMS basedIMS based

From

network point of view

From

network point of view

Page 6: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

China Telecom Beijing Research Institute 6xcfhttp://www.ctbri.com.cn

CCSA’s Contribution to International Standards

China submitted a total of 270 NGN-related contributions to ITU-T SG11/13/19/FG from 2005 to February 2006.

The contributions cover a wide range of areas including servicerequirement, architecture, security, QoS, future bearer network, network evolution, signalling, FMC,and user database.

The quality of contributions is improving. 19 draft recommendations on international standards were developed based upon China’s proposals. Breakthroughs were made in the following areas: – Call server-based PSTN/ISDN Emulation: architecture and

network delivery. – Resources control, including signalling requirement and

relevant requirements– FMC: requirement and delivery

Page 7: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

China Telecom Beijing Research Institute 7xcfhttp://www.ctbri.com.cn

Agenda

SoftSwitch Standards Development in CCSA

China Telecom’s Considerations on Network Evolution

Page 8: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

China Telecom Beijing Research Institute 8xcfhttp://www.ctbri.com.cn

China Telecom Status (by 2006.2)

PSTN subscribers 154.5MPHS subscribers 58.52M

Total: 213 MBroadband subscribers 22.43M

Page 9: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

China Telecom Beijing Research Institute 9xcfhttp://www.ctbri.com.cn

NGN Focuses at Different Stages

NGN focuses of China’s fixed operators:

Near-term: enhance effectiveness and increase cash flow through network intelligence (smat HLR)

Mid-term: improve the manageability and operability of broadband networks and create a rational broadband value chain to facilitate the transformation

Long-term: add values (multiplay and FMC) based upon an integrated, manageable and operable broadband network.

NGN focuses of China’s fixed operators:

Near-term: enhance effectiveness and increase cash flow through network intelligence (smat HLR)

Mid-term: improve the manageability and operability of broadband networks and create a rational broadband value chain to facilitate the transformation

Long-term: add values (multiplay and FMC) based upon an integrated, manageable and operable broadband network.

1. Control of broadband value chain

2. Completion of national/corporate IMS standards

3. IMS equipment testing, interconnection and network access testing

4. IMS trial deployment 5. 3G larges-scale

Development 6. FMC and Multi Play

2001 2003 2005 2008

1. Large-scale deployment of smart HLR and softswitch networks

2. Relations between IMS and softswitch

3. IP backbone and IP MAN

1. Softswitch equip. spec.

2. MGW equip. spec.3. SIP spec.4. H.323 spec.5. H.248 spec.6. MGCP spec.7. Sigtran spec. 8. … …

1.smart HLR trial

2.soft switch networks trial

3.Interconnection testing and network access testing

Completion of softswitch national/corporate standards

Deployment of small-scale softswitch network

Deployment of large-scale softswitchnetwork

Maturity of broadband managemenAnd control technologies and

completion of IMS equipment testin

Long-term: add value Mid-term: broadband mgmt. and contr.

Near-term: tap potentials and enhance efficiency

Transition

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China Telecom Beijing Research Institute 10xcfhttp://www.ctbri.com.cn

Smart HLR Introduced to Fixed Network

Smart HLR system

components:

-Core: SHLR

-Switch,Softswitch

-Application platform

-BSS/OSS

OSS/B

SSSHLR

Switch Softswitch

SCPSCPSCP APP ServerAPP ServerAPP Server

INAP/SIP…

Extend ISUP/ Extend MAP

eg.MAP/Diameter

Application Platform

SHLR SHLR

Page 11: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

China Telecom Beijing Research Institute 11xcfhttp://www.ctbri.com.cn

Case of SHLR

Trial and Operation in Fujian Subsidiary

Investment

RMB/User*

11.2

4.5

5.6

1.1 Supporting System Re-construction

Switch Software&Hardware Upgrade

SHLR Platform Construction

New Services Provided

Number Portability Simultaneous ringFixed-phone personal ring toneOne number … …

• Outcome as of Sept. 2005

Over 470 thousand users, accounting for around 4% of total local subscribers

More than RMB 32 million revenue

Oct. 2003 Initial trial in Quanzhou Branch

Oct. 2004 Commercial operation in Quanzhou Branch

Jan. 2005 Full upgrade in Fujian Subsidiary

Note: * Users based on total local subs as of 2004

Page 12: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

China Telecom Beijing Research Institute 12xcfhttp://www.ctbri.com.cn

China Telecom’s SoftSwitch Strategy

Softswitch NetworkSoftswitch NetworkPSTNPSTNPOTSPOTS POTSPOTSPOTSPOTS POTSPOTS POTSPOTSPOTSPOTS

Local NetworkLocal NetworkLocal NetworkLocal NetworkLocal NetworkLocal NetworkLocal NetworkLocal Network

Tandem OfficeTandem Office

Toll OfficeToll Office

Long Distance NetworkLong Distance NetworkLong Distance NetworkLong Distance NetworkLong Distance NetworkLong Distance NetworkLong Distance NetworkLong Distance Network

End officeEnd office

SS7SS7

IADAGTG

SG

Softswitch

AS

POTSPOTS POTSPOTSPOTSPOTS POTSPOTS POTSPOTS

Requirements of Requirements of PSTN capacity expansion PSTN capacity expansion

Requirements of Requirements of TDM Switch substitution TDM Switch substitution

Requirements of Requirements of Integrated Services Integrated Services

Requirements of Requirements of New Subscriber expansionNew Subscriber expansion

Drives for evolution to softswitchDrives for evolution to softswitch

Page 13: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

China Telecom Beijing Research Institute 13xcfhttp://www.ctbri.com.cn

SoftSwitch Network Structure of China Telecom

IPIP

IP

Domain softswitch

softswitchsoftswitch

Softswitch set centralized Softswitch set centralized

DC2DC2 TmTm LsLs TrunkingTrunkingGWGW

AG/IADAG/IAD

Backbone

local

Smart Smart HLRHLR

Service platform

Central service platform

SIP PhoneSIP Phone

Domain softswitch

Service platform

softswitch

Softswitch set centralized in Softswitch set centralized in several domainseveral domain

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China Telecom Beijing Research Institute 14xcfhttp://www.ctbri.com.cn

Combines enterprise office system with telecom capabilities. Provides service features such as address book, point-to-point video, instant message, click-to-conference, etc.

UC(Unified

Communications)

‘PC-to-Phone’ 800 serviceWeb800

Fixed-line, PHS and mobile numbers are bound through UPT. UPT and Personal Tone can be bound or provided separately.

UPTPersonal Tone

Short-number service within broadband group subscribersIP Centrex

Point-to-point video communication for broadband subscribers

Video Communication

Main function descriptionService name

Trial Commercial Services of China Telecom

Page 15: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

China Telecom Beijing Research Institute 15xcfhttp://www.ctbri.com.cn

China Telecom’s NGN Practice

July 2001: Launched NGN softswitch trial project

July 2002 ~ Jan. 2003: Conducted Phase 1 field trial and evaluated more than 2, 600 test items in 4 cities with products from 5 vendors

Apr.2003 ~ Dec.2003: Conducted Phase 2 field service tests, including API test, interoperability test, service experiment, trial running, etc.

2004: Put NGN softswitch in trial commercial deployment in Guangdong, IPTV testing and commercial trial in 5 Province,

2005: Put NGN softswitch into commercial operation on long distance networks and north China, deploy smart HLR in fixed network, IP network “CN2” deployment

2006 ~ : focus on IMS solution for fixed operator and FMC

Page 16: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

China Telecom Beijing Research Institute 16xcfhttp://www.ctbri.com.cn

China Telecom’s Considerations on Network Evolution

• Reconstruction of IP bearer networks and construction of softswitch networks

• Upgrade of services systems and broadband access networks

• Reconstruction of IP bearer networks and construction of softswitch networks

• Upgrade of services systems and broadband access networks

2006 2008

• Introduction of IMS and

Development of FMC

• Further integration of service

systems and Development of

broadband-based multiple

accesses.

• Introduction of IMS and

Development of FMC

• Further integration of service

systems and Development of

broadband-based multiple

accesses.

2010

Phase I: Startup

Integrated and converged networks

Phase II: Transformation GoalsBasically Fulfilled

Page 17: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

China Telecom Beijing Research Institute 17xcfhttp://www.ctbri.com.cn

Future Core Control Network: Substantive Progress Made for IMS Standards

According to Gartner, IMS will become mature in 2 to 5 years.

IMS is a better core network architecture for multimedia broadband users and softswitch is a mature control core of voice networks.

According to Gartner, IMS will become mature in 2 to 5 years.

IMS is a better core network architecture for multimedia broadband users and softswitch is a mature control core of voice networks.

Gartner 2005 Report

Long-term: add value Mid-term: broadband mgmt. and contr.

Near-term: tap potentials and enhance efficiency

SHLRENIP

MSAN

C4 SS

TMG SIP/323 PHONE

SIP AS

C5 SS

HSSENIP

MSAN

AGCF

TMG323 PHONE

SIP AS

S-CSCF

P-CSCFMGCF

SIP PHONE

I-CSCF

Page 18: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

China Telecom Beijing Research Institute 18xcfhttp://www.ctbri.com.cn

NGN Is a Controllable Architecture

Telecom operators is seeking for solutions that can control IP networks.Providing operations with capabilities to control and manage IP-based networks and servicesNetwork convergence capabilities - IMSFlexible extension and combination in the service planeAccess control, ID and management in the user access plane – NASS and RACE

Page 19: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

China Telecom Beijing Research Institute 19xcfhttp://www.ctbri.com.cn

IMS Is the Future Platform of Convergence

Adoption of SIP signaling as call control, enhanced service control capability.Better openness and higher degree of standardization IMS is the future network architecture, which can improve the controllability and manageability of IP stream. IMS architecture is design for service control and convergence. Wireless and wire line access have a single core network, a centralized user database in the network layer, an integrated billing system and service development platform, a unified services authentication architecture and automatic roaming abilities through nationwide network.

Page 20: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

China Telecom Beijing Research Institute 20xcfhttp://www.ctbri.com.cn

Considerations on IP MAN

Identify levels, enhance functions, standardize equipment and focus upon performance

Clear Network levels. The separation of layer 2 and layer 3, construction of a clear 3-layered routing network (backbone metropolitan area network) and a 2-layered access network (broadband access network).

Flat network structure. Reducing the physical and logic cascade progression of IP MAN through backbone MAN having large capacity and a small number of nodes and broadband access network having wide coverage.

Differentiation of network quality. Differentiate service mechanisms through IP MAN and provide differentiated services of varied QoS for different services and users.

Concentration of management and control. Construct a clear service access control layer to have a centralized management and control of services BRASs and SRs.

Standardization of equipment requirements. The functions and performance of new equipment must be able to meet the management requirements of the MAN.

Page 21: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

China Telecom Beijing Research Institute 21xcfhttp://www.ctbri.com.cn

Unified User Database

Unified user database is a logic entity, It realizes centralized storage and usage of user data based upon user databases of service networks.

Logic centralization. Data can be stored and used in a centralized way through the introduction of a logic data layer and distributed database technology. All networks have to go through the access gateways to access the integrated user database.

Need further studyNeed further study

PSTN/PHS

PSTN/PHS

IADAG

softswitch

Unified user databaseUnified user database

HSSHSS

3G RadioNetworks3G RadioNetworks

INAP

LDAP

SIP/API SIP

…….

SS7SIP

IMSIMS PLMNPLMN

HLRHLRSHLRSHLROther user database

Other user database

Diameter

Other user database

Other user database

Page 22: Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch Standards in China and China Telecom’s Considerations on Network Evolution Ms. Zhao

China Telecom Beijing Research Institute 22xcfhttp://www.ctbri.com.cn

THANK YOU