introduction of ims for 3g voice services and migration...
TRANSCRIPT
Introduction of IMS for 3G Voice Services
and Migration Strategies to ALL -IP Network
3GPP release 8 IMS Implementation, Deployment and TestingSophia Antipolis, France
(c) 2010 NTT DOCOMO, INC. All Rights Reserved.
Kenya Kusunose
NTT DOCOMO, INC.Core Network Development Department
24 NOVEMBER 2010
and Migration Strategies to ALL -IP Network
Agenda
1. Mobile Communication Situation in Japan
2. Network migration to IMS and ALL-IP Network
(c) 2010 NTT DOCOMO, INC. All Rights Reserved. - 1 -
Mobile Communications Situation in Japan
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� Japan’s cellular market entered a mature phase : penetration rate reached over 80% and growth of net additions has slowed to half the previous level.
� DOCOMO controls a market share of 49.7% in this market.
Annual subscriber growth: 5 million
(Million subs)
100
Cellular market share
Total subscriptions: 113.7 million
Changes in market environment
Japan’s Cellular Market
As of June 2010
2.22.2%%%%%%%%
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- 3 -96/3 98/3 00/3 02/3 04/3 06/3 08/3
Annual subscriber growth: 10 million
Expansionphase
Expansionphase
MaturephaseMaturephase
20
40
60
80
49.749.7%%%%%%%%28.228.2%%%%%%%%
19.9%19.9%
- 3 -
Subscriber Migration to 3G Service
No. of Subscriptions: 56.8mil.3G penetration rate: 96.6%3G ARPU : \5,200% of postpaid subs.: Over 99%(Million subs.)
DOCOMO’s 3G Growth DOCOMO’s Packet Traffic Volume
4,000
5,000
Pac
ket T
raffi
c Vo
lum
e pe
r U
ser
per
Day
3G User Packet Traffic
(Flat-rate Pake-Hodai:Launched in June, 04)
(As of 2Q/FY2010)
• Japan’s cellular phone market is one of the most ad vanced in the world, characterized by high percentage of postpaid subscriptions(over 99%) and broad adoption of 3G(over 96%) .
• 3G can accommodate larger traffic volumes compared to 2G. A growth in the packet data traffic volume indicates potential demand for data communications.
(As of Sep 2010)
(As of Sep. 2010)
57.557.557.557.5
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Fiscal Year
(Million subs.)
1,000
0
2,000
3,000
Pac
ket T
raffi
c Vo
lum
e pe
r U
ser
per
Day
1999 2000 2001 2002 2003 2004
2G User Packet Traffic Volume
3G User Packet Traffic Volume
Source: Telecommunications Carriers Association (TCA), WCIS+
'01 '02 '03 '04'00 '050000
10101010
20202020
30303030
40404040
50505050
60606060
'06 '07 '08
51.151.151.151.1
23.523.523.523.5
52.152.152.152.1
30.830.830.830.8
53.453.453.453.4
43.943.943.943.9
54.654.654.654.6
49.049.049.049.0
56.156.156.156.1
53.253.253.253.2
2G(PDC)2G(PDC)
3G(W3G(W--CDMA)CDMA)
‘09Forecast
57.557.557.557.5
56.256.256.256.2
’10
Network migration to IMS and ALL-IP Network
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Evolution of All-IP network ~ phased approach
Background
IT infrastructure
・Increase of data traffic- Flat-rate packet service
- High speed radio access
Lifestyle infrastructure
・Diversified radio access(3G/HSPA/LTE/…)
・Renewal of the existing switching
Service infrastructure
・Maturation of cellular market・Entrant of new players,
i.e. service providers
Phase 1IP based nodes
Phase 2IMS & SAE
Objective of All-IP network・・・・Network node cost reduction・・・・Efficient multi-access handling・・・・Service enrichment
Phase 3Service Enabler Network (SEN)
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- High speed radio access ・Renewal of the existing switchingsystem
i.e. service providers
Objectives
・・・・Network node cost reduction ・・・・Simple NW structure・・・・Seamless service provision
among radio accesses・・・・VoIP → Preparation towards
LTE
・・・・Various network service provisioning with time to market and low cost
Enhance
ment
measures
Introduction of IP-based nodes using general-purpose
servers
Seamless mobility among variety of radio access (SAE)
Introduction ofService Enabler Network (SEN)
Integrated IP NW & call control among radio accesses (IMS)
Variety of Network EnablersDedicated (separated) networkfor packet domain
At start of 3G (FOMA) service in 2001• Voice services traffic was dominant and data traffic was relatively small volume.
Network needs to handle;�voice services traffic with high quality , as well as, �both voice services and data traffic simultaneously
• ATM was the best technology to realize above require ments.
ATMCore network GMSC/GGSNGMSC/GGSN
Phase 0: Pre All-IP Network (Integrated ATM Network ) (2001)
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Radio access network
User equipment
RNCRNC
MSC/SGSNMSC/SGSN
BTSBTS
Integrated core networkfor both voice & data servicesVoice & Packet
IPDedicated core network
Continuous increase of data traffic���� Packet NW was separated from integrated ATM NW (around 2004)
in order to scale out the capacity easily to cope w ith increasing data traffic. �Applying IP-based nodes using routers & general-pur pose servers for packet
network
ATMCore network GMSCGMSC GGSNGGSN
Phase 1: Dedicated Packet Switch domain (2004 -05)
Dedicated core network
GMSC/GGSNGMSC/GGSN
(c) 2010 NTT DOCOMO, INC. All Rights Reserved.
Packet
Dedicated core networkfor data services
- 8 -- 8 -
Radio access network
User equipment
RNCRNC
MSCMSC
BTSBTS
SGSNSGSNVoice
Dedicated core networkfor voice services
MSC/SGSNMSC/SGSN
Evolution of All-IP network
Background
IT infrastructure
・Increase of data traffic- Flat-rate packet service
- High speed radio access
Lifestyle infrastructure
・Diversified radio access(3G/HSPA/LTE/…)
・Renewal of the existing switching
Service infrastructure
・Maturation of cellular market・Entrant of new players,
i.e. service providers
Phase 1IP based nodes
Phase 2IMS & SAE
Objective of an All-IP network・・・・Efficient data traffic handling
・・・・Multi-access handling・・・・Service enrichment
Phase 3Service Enabler Network (SEN)
(c) 2010 NTT DOCOMO, INC. All Rights Reserved. - 9 -
- High speed radio access ・Renewal of the existing switchingsystem
i.e. service providers
Aims
・・・・Efficient data traffic・・・・Network cost reduction
・・・・Simple NW structure・・・・Seamless service provision
among radio accesses・・・・VoIP → Preparation towards
LTE
・・・・Various network service provisioning with time to market and low cost
Enhance
ment
measures
Introduction of IP-based nodes using general-purpose
servers
Seamless mobility among variety of radio access (SAE)
Introduction ofService Enabler Network (SEN)
Integrated IP NW & call control among radio accesses (IMS)
Variety of Network EnablersDedicated (separated) networkfor packet domain
ATM
CS domain
IMS introduction for 3G voice services has benefit for operator to reduce CAPEX/OPEX.• Replace traditional switch to general-purpose server base nodes.• Only PS domain required. Voice communication can be provided throu gh PS domain.• Re-use of IMS for other access systems. (e.g. LTE, NGN, WiMAX, …. ) • Smooth migration toward future LTE/4G voice communication (VoIP). • Preparation for network service enrichment by SEN on IMS (Phase 3) (introduce later)
IPCore network GMSCGMSC IMSIMS
Phase 2:Integrated All-IP NW(IMS introduction for 3 G voice, around 2010)
PS domain
GGSNGGSN S/P-GWTerminate
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Radio access network
User equipment
MSCMSC CSCS--GWGW
Voice & Packet
BTSBTS
RNCRNC
SGSNSGSN
eNodeB LTE
MME
ATM network
Phase2:IMS introduction for 3G voice services•Migrate the 3G Circuit-Switched network configured with ATM switches to the network that processes IP-based protocols (SIP, RTP, etc.) in se rver equipment
•Process the existing radio interface and 3G radio a ccess network, without making changes , by converting them to IP-based protocols in CS-GW
•Perform unified Call ////Service control in IMS ���� preparation to LTE Voice call handling
HLR/HSS
AS
Bill detailsMediaServer
Service controlService controlMGW
PLMN gatePLMN gate
IMSCall controlService control
HLR Bill detailsMediaServer
ATMNW
POIPOI
Router network
TMSC
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CS-GWAccommodate Accommodate 3G3G--CSCSaccessesaccesses
PLMN gatePLMN gate
GuidanceGuidance
GGSN/SGSN
CSCF
RNC RNC
Call controlCall control
Existing radiointerface
IP-based protocols(SIP, RTP)
MRF
Protocolconversion
GMSC
GGSN/SGSN
RNC RNC
MSC
GMSC
3G packet3G packet
3G packet3G packet
POIPOI
�Applying server tech.
�VoIP on core NW
�Unified call control
by IMS
TMSC
CS-GW’s function
PS
SIPfunctions SIP
To IMS through GPRSSIP
functions
•CS-GW’s function is to convert CC/MM to SIP.•With CS-GW all users can use any existing UE in IMS networks.•With the traditional method (e.g. through GPRS), us ers can only use SIP functions provided by the UE.
PS
(c) 2010 NTT DOCOMO, INC. All Rights Reserved. 12CSCF
SM/GMM
CSCF
CS-GW
UE
UE
PSfunctions
CSfunctions CC/MM
SIP
GGSN
To IMS through CS-GW
SIP functionality is NOT needed.
PSfunctions
SIPfunctions
SIPfunctions
CSfunctions
Bandwidth control to keep QoS
ASAS CSCF executes bandwidth control on each route.
INVITE
•To keep QoS of voice service in IMS network the sam e as in 3G-CS NW, the proposed IMS network adds a function to control ban dwidth virtually.
•The control is executed by bandwidth build-up based on the number of sessions. •CSCF and CS-GW build up bandwidth in response to ea ch session type (voice or AV) and control call admission.
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CSCF
CS-GW
CSCF
CS-GW
Setup
INVITE
IP network
INVITE
CS-GW executes bandwidth control on a route to AR.
AR AR
ER ER ER ER
LCR LCR
CR
Aggressive schedule for migration(IMS introduction)� We just launched a plan for IMS introduction last M arch.� We will complete the plan in two years.� After completing the plan, all 3G voice services ar e controlled by IMS in DOCOMO’s
network(56 million users).
(%)
100
In Two Years
PercentComplete
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100
50
0
Evolution of All-IP network
Background
IT infrastructure
・Increase of data traffic- Flat-rate packet service
- High speed radio access
Lifestyle infrastructure
・Diversified radio access(3G/HSPA/LTE/…)
・Renewal of the existing switching
Service infrastructure
・Maturation of cellular market・Entrant of new players,
i.e. service providers
Phase 1IP based nodes
Phase 2IMS & SAE
Objective of an All-IP network・・・・Efficient data traffic handling・・・・Multi-access handling
・・・・Service enrichmentPhase 3Service Enabler Network (SEN)
(c) 2010 NTT DOCOMO, INC. All Rights Reserved. - 15 -- 15 -
- High speed radio access ・Renewal of the existing switchingsystem
i.e. service providers
Aims
・・・・Efficient data traffic・・・・Network cost reduction
・・・・Simple NW structure・・・・Seamless service provision
among radio accesses・・・・VoIP → Preparation towards
LTE
・・・・Various network service provisioning with time to market and low cost
Enhance
ment
measures
Introduction of IP-based nodes using general-purpose
servers
Seamless mobility among variety of radio access (SAE)
Introduction ofService Enabler Network (SEN)
Integrated IP NW & call control among radio accesses (IMS)
Dedicated (separated) networkfor packet domain
Variety of Network Enablers
DOCOMO’s SEN (Service Enabler Network) ConceptProvide a variety of services to satisfy various us er needs with timely manner.
• SEN (Service Enabler Network) is service provision platform on top of IMS Core .• Enabler is the piece of service function that can be common ly used by multiple services. • By combining multiple enablers , realize various services (corporate, consumer , e tc.)
within reasonable time period and cost.
EnablerPresence IM Contents
sharing
RCS
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LTELTE
SENSENSENSENSENSENSENSEN(Service(Service--Enabler Network)Enabler Network)
3G area
Combine enablers
All-IP NW
IMSCore
(Reference 1)RCS (Services provided by mutually connecting the IMS among operators in different countries: First release can realize instant messaging, presence and contents sharing by using part of SEN)
(Reference 2)Enabler is a service function part that can be commonly used by multiple services.
Combination of standardized enablers and operator-specific enablers , realizes the specialized services for operator.Standardization of the mechanism to offer value-adde d NW services is developed as the GSMA RCS release 3 . DOCOMO is leading a study group.
Example of value-added NW service
RCS Standard Enablers (Release 1)
PresencePresenceContentContentsharingsharing
Media Media Processing Processing
AA
Media Media Processing Processing
BB
Operator-specific Enablers
Instant Instant messagingmessaging . . .
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Realization of Value-Added NW Services
Service Service CompositionComposition
IMSCoreIMSCore
位置情報シェアHere
Location Info. Location Info. SharingSharing
Voice callVoice call
I guess you are close now.I’m already here.Where are you , Aya? I’m at this point now!
I’m getting closer to you!
Conclusion
To live up to user’s demand to enrich the mobile services,
mobile systems are continuously evolved.
NTT DOCOMO,
– is going ahead with the migration plan to ALL-IP
network.
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network.
– introduce IMS begin by applying 3G voice services.
– replace ATM network with IMS network in two years.
– provide netwok value added services using the IMS.
– Service Enabler Network(SEN) concept.
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