ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006
International Telecommunication UnionITU-T
Migration Scenarios to NGNMigration Scenarios to NGN
Steven Lim Shue PingProduct Manager – NGN Voice Solutions
Siemens Communications Fixed Network Asia Pacific Regional Headquarter
ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006 2
ITU-T
Embedded Telephony Subscriber Base
2002 2003 2004 2005 2006 2007 2008 20090,0
0,5
1,0
1,5
Subs
crib
erLi
nes
(in b
illion
s)
Source: ITU Main Telephone Lines and Dell’Oro Group estimates (Q2/2005)
TDM-based
NGN-basedPOTS
VoBB
VoIP – The POTS of the FutureThe VoIP market is taking off in all regions of the world
IP-based
20152009
ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006 3
ITU-T
NGN Migration Approaches
o Two steps to migrate to NGN:• Softswitch based PSTN Emulation
— Highlights : 100 % preservation of TDM voice features
• IP Multimedia Subsystem (IMS) based PSTN Simulation— Highlights : Some important voice features +
NEW multimedia services
ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006 4
ITU-T
Definition
o PSTN/ISDN EmulationMimicking a PSTN/ISDN network from the point of view of a legacy terminal by an IP network, through a gateway. All PSTN/ISDN services remain available and identical (i.e. with the same ergonomics) such that end users are unaware that they are not connected to a TDM-based PSTN/ISDN.
o PSTN/ISDN SimulationThe provision of PSTN/ISDN-like services to advanced terminals such as IP-phones. There is no strict requirement to make all PSTN/ ISDN services available or identical, although end users expect to have access to the most popular ones, possibly with different ergonomics.
ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006 5
ITU-T
IP Transport (Access and Core)
Resource and Admission Control Subsystem
Core IMS
AS
ChargingFunctions
Mw
Mw Mw/Mk/Mm
Mr
Mg
Mj
Mi
Mp Mn
Gm
Gq
ISC Cx
Dx
Dh
Sh
Ic
Rf /Ro
Rf /RoCx
Ib
Ia
Id
If
Ie
Mi
Mw
NetworkAttachmentSubsystem
ASChargingFunctionsHSS
S-CSCF I-CSCF
SLF
BGCF
MGCFMRFCP-CSCF
UE
A-BGF MRFP
PSTN/ISD
N
T-MGF
SGF
I-BGF
Other IP N
etworks
IBCF
IWF
NGN Architecture
ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006 6
ITU-T
PSTN Emulation Architecture
Media Gateway for Trunks
POTS
Multi-ServiceAccess Node
Softswitch
ISDN
IP Core Network
SS7
PSTN Network
SS7Switch STP
POTS/ISDN
ResourceServer
xDSL
Media Gateway for Access
V5.2
V93DLUDLUDLU ISDN-PRI
Otheraccess equipment
Digital Line Unit
SS7oIP
Signaling GatewaySIP-I
Management System
DLU DLU DLU IPIPIP
Multi-Service Access Node
H.248
H.248
H.248
MGCP
H.248/MGCP
POTS/ISDN xDSL
ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006 7
ITU-T
Highlights for Softswitch based PSTN Emulation
o Provides current PSTN/ISDN serviceswith an unchanged presentation (100% feature preservation) for all interfaces
o Services/features provided by call control of Softswitch
o H.248 control of Access Gatewayso Covered by existing ETSI TISPAN and ITU-T
standardso Emulation domain (softswitch) and IMS session
control are interworking via SIPo Possibility to re-use installed access equipments
(POTS, ISDN, PRI, CAS etc)o Protection of embedded subscriber base through
immediate migration
ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006 8
ITU-T
Migration Scenario – Class 4
Value proposition! Reduction of network elements to be managed ! Reduction of operational expenses (OPEX)! Efficient, simpler architecture based on IP
TDM Network
Carrier-grade IP
other PSTN other PSTN
Switch Switch
TX
TX TX
LX
ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006 9
ITU-T
Migration Scenario – Class 5
TDM Network
Carrier-grade IP
other PSTN other PSTN
SwitchSwitch
LX
DLU DLU DLU IPIPIP
Value proposition! Reduction of network elements to be managed ! Reduction of operational expenses (OPEX)! Grow on IP -> Future Proof solution ..! 100% preservation of Class 5 features
ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006 10
ITU-T
Applications
SIP
PSTN Emulation
Trunk MGW
SS7
PSTN/ISDN
PSTN
Narrowband Subscribers & Legacy Access EquipmentsPOTS, ISDN BRI, ISDN PRI
H.248
MGCF & AGCF
PBX
Access GW
Unified Messaging
Video MailMessaging ConferencingPush to Talk
IP Centrex
Voice Application Server
Voice and Video Telephony
Presence
PSTN Simulation Architecture
DLUDLUDLU
SIP
Broadband SubscribersxDSL, WiFi, GPRS, UMTS
CSCF
SIP
HSS
Diameter
IMS
PSTN Simulation
ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006 11
ITU-T
Highlights of PSTN Simulation based on IMS
o Focus on New Multimedia serviceso Advanced Multimedia services like push-to-talk,
video conferencing, IP centrex etco Converged services across different acccess
domains, eg: mobile networks, broadband wireline networks (xDSL, FTTH etc), WiFi
o Voice service is limited to simulation, with SIP based voice application server
o Most commonly used and popular voice services are simulated (eg: CLIP, Call Forwarding etc) –PSTN Simulation
o Interworking with PSTN Emulation domain via SIP
ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006 12
ITU-T
IMS is a key element in NGN network evolution
o IMS (IP Multimedia Subsystem) is the common control infrastructure for real-time and non-real-time end-to-end multimedia services and any mixture of those
o IMS is designed and standardized by 3GPP to integrate smoothly with existing mobile and fixed networks
o New and existing services (e.g. Presence, Location) and applications can be connected and controlled by IMS through the standardized ISC interface
o By using SIP (Session Initiation Protocol) IMS based services can be accessed from any IP/SIP capable device (UMTS, GPRS, WLAN, wireline users, etc. )
ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006 13
ITU-To No IMS: - repeated vertical integration
- no synergies!o With IMS: - one-time integration
Application 1 ... n
Specific Databaseper Application
Specific Billing
Specific Network Integration
Specific O&M
SpecificSession Control
Specific Databaseper Application
Specific Billing
Specific Network Integration
Specific Sign-onAuthentication
Specific O&M
SpecificSession Control
...
Application 1 ... n
Global User Database
One Billing
Common network Integration
Single Sign-onAuthentication
Common O&M
One MultimediaSession Control
IMS
...
Specific Sign-on Authentication
IMS allows efficient application integration
ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006 14
ITU-T
IMS as Service Delivery Platform – Mobile IP Centrex
o Hybrid Centrex Groups • SIP phones• GSM / UMTS phones
(2G, 2.5G & 3G)o Wide range of enterprise
features to all this device types under a single platform
o Common feature set to business group users connected via fixed IP phones/Softphones, mobile phones
IP Network
Media Gateway ControllerMobile Centrex
Server
SIP PhoneSoftPhone
UMTS
IP
PDA
GSM Terminal UMTS
Terminal
Mobile IP Centrex Group
PLMN
Gateways
Call Session Control Function
ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006 15
ITU-T
IMS as Service Delivery Platform – Video Call Applications
VIDEO TELEPHONY VIDEO PORTAL VIDEO MAIL VIDEO CONFERENCING
o Video Telephony is provided to SIP clients with interworking with 3G.
o Video portal enables SIP/3G users to stream video contents from portals
o Video Mail enables to access their recorded video mails, and also to record a videomessage to answer calls
o Video Conferencing enables users to establish video conferences with up to 16 participants per conference
ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006 16
ITU-T
IMS as Service Delivery Platform – One Number Service
o The Voice Application Server is used to provide call supplementary services for all IMS subscribers. The Mobility Management Application Server provides roaming between mobile network and IMS network
PSTN
SS7SS7
GSM/GPRS
HLR MSC/VLR
RAN
ISUPSIP (ISC)
MAP
CSCFSIP
SIP
MGW
MGCF
WiFi CPE DualModeHandset
SIP Phone Analogue Phone
VAS MM
HSS
GGSN/SGSN
ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006 17
ITU-T
Migration to NGN today for the benefits tomorrow
o Migration towards NGN with PSTN Emulation based on softswitch
• IP based, flatten, simplified network• 100 % preservation of TDM voice features
o Introduction of IMS as service delivery platform• Introduction of SIP based, revenue generating
applications to increase ARPU, eg: Mobile IP Centrex, Video call applications etc
• Fast, simple introduction of new services
o Provides attractive service bundling• Reduce churn rate with triple play services• One platform for video, voice and data
Defend
Attack
Exploit
ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006 18
ITU-T
“There has been a change of pace at KPN this year. We have put our innovation initiatives in high gear, and the roll out of our strategy to attack new revenue opportunities, defend our leading share for traditional services and exploit a structurally lowercost base is on track. We are delivering on our promises, with increased revenues and an improving margin ... With the launch of Consumer VoIP services we took the first steps in our migration to an all IP network, the future basis for all our services."Ad Scheepbouwer, CEO of KPN, August, 2005
"In the years ahead KPN and its customers will be entering an IP world in which communication is set to change fundamentally. … SIEMENS' strength in fixed and mobile networks was obviously extremely important to us.”Eelco Blok, KPN managing board member, December 2004
An innovative total package that offers unlimited calls in the weekend to all fixed lines in the Netherlands and unlimited ADSL (800Kbs) in one single subscription for € 34.95
In Q2 2005, KPN launched
'Internetplusbellen'
Powered by Siemens
Technology
The bundle price for this combined subscription costs less than two separate subscriptions for telephony and Internet.
The bundle price for this combined subscription costs less than two separate subscriptions for telephony and Internet.
Leadership of converging
communications market
Attack
Defend
Exploit The cornerstoneof KPN strategy
GO FOR VoIP
Case Study KPN, Netherlands Case study