Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch...
Transcript of Development Scenario of SoftSwitch Standards in China and ...Development Scenario of SoftSwitch...
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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
China Telecom Beijing Research Institute 2xcfhttp://www.ctbri.com.cn
Outline
SoftSwitch Standards Development in CCSA
China Telecom’s Considerations on Network Evolution
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.
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
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
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
China Telecom Beijing Research Institute 7xcfhttp://www.ctbri.com.cn
Agenda
SoftSwitch Standards Development in CCSA
China Telecom’s Considerations on Network Evolution
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
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
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
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
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
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
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
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
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
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
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
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.
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.
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
China Telecom Beijing Research Institute 22xcfhttp://www.ctbri.com.cn
THANK YOU