implementing lte with ims -...

Implementing LTE with IMSImplementing LTE with IMS

HUAWEI TECHNOLOGIES CO., LTD. www.huawei.com

ETSI IMS Implementation Deployment and TestingSophia Antipolis France, 24/25 November 2010

Rebecca CopelandHead of Strategic SolutionsEuropean Core Networks


Implementing LTE with IMS

Content

► Role of IMS in LTE

HUAWEI TECHNOLOGIES CO., LTD.2

► Role of IMS in LTE

► Handover SRVCC and ICS

► QoS Evolution

► Migration to a Universal User Database

► Interoperating IM with SMS



Sweden

World’s 1st LTEWorld’s 1st LTE--EPC Commercial EPC Commercial

LaunchLaunch

World’s 1st EPC World’s 1st EPC

World’s 1st World’s 1st Commercial PCC Commercial PCC

deployment in EPCdeployment in EPCMajor partnership Major partnership

from 2G/3G to LTEfrom 2G/3G to LTE--EPCEPC

Norway Oslo

USA

Shanghai, Guangzhou

Armenia , Uzbekistan

Germany

Huawei is Leading in LTE/EPC Deployments

Kuwait

PolandLatvia

18+ commercial contracts

60 trials ongoing

HUAWEI TECHNOLOGIES CO., LTD.

World’s 1st EPC World’s 1st EPC commercial site with commercial site with

end to end QoSend to end QoS

EPCEPC

TeliaSonera: World’s 1st

commercial launched EPC

T-Mobile: major Migration Partner from 2/3G to LTE/EPC

China Mobile: World’s 1st

end to end QoS EPC

Cox: 1st Commercial PCC deployment in EPC

Huawei IMS is now rolling

Europe 19%

CIS 8%

China 30%

Middle East & Africa 18%Asia Pacific

14% American 11%

More than 120 (10Q2) contracts globally

25%

52%

23%

0%

20%

40%

60%

Fixed FMC Mobile


� Hungary - the earliest large-scale commercial deployment of IMS � Commercial TAS for DT Germany � Large IMS PSTN Migration in Asia, within 4M subscribers� North America, large VoCable network with PC2.0 architecture compliant� An overwhelming market share in China, more than 12M IMS subscribers

DSLDSL

►LTE separates the signalling path from the media path►LTE allows one MME to be paired with any available S-GW

Evolution from GPRS/CS to LTE

IMSIMS

LTELTE

PCRFPCRFHSSHSS

WiMaxWiMax

WLANWLANCSCFCSCF


DSLDSL

GPRSGPRS

MMEMMELTELTE

The Role of IMS The Role of IMS –– Provide Common Core for LTE as An other Access NetworkProvide Common Core for LTE as Another Access Netwo rk

S-GWS-GW

S-GWS-GWPDNPDN

SGSN GGSN

IP Bearer

OneVoice to VoLTE – IMS is Now Mandatory

ISC

eMSS

MGWI2

Legacy SCP or NGIN

I3cTASCSCF

Mc

SIP

IMS-SSF

Diameter

ISC2G/3G

Roa

min

g &

HO IMSIMS

NAB

Sharing

XDMS

IM

RCSRich Communication Suite

Presence


The Role of IMS The Role of IMS –– Voice Session Control and service environmentVoice Session Control and service environment

HLR/HSSSvSGs

SIP

EPCEPCMME

SAE GW

SBC

Diameter

LTERoa

min

g &

HO

PCRF

All the components are ready:IMS AS: Common TAS for 2G/3G/LTE/PES/PSSIMS AS: RCS service experienceSDB: HLR/HSS convergence data synchronizationCS: Enhanced MSS for SRVCC & ICSPS: EPC for E2E QoS and SRVCC collaborationTerminals: Unified Soft Client for MMTel and RCS

Attributes►Based on LTE/IMS Voice & IMS services MMTel►Uses IMS AS (the SCC) for transition solution►Parallel handover of signalling and media for faster call set-up ►Low cost terminals that save battery life (Single Radio) ►Can start to retire GPRS as both Voice & Data move to LTE

SR-VCC: Single Radio Voice Call Continuity

IMSIMS ICS ASICS AS

Service Centralisation & Continuity

Sv

Initiate Handover to GPRS Data

LTELTE

HSSHSSImpact

- Requires IMS handover service from day 1- Needs handover client- Has impact on OSS/BSS. IP Bearer

PDNPDN

CSCFCSCFPCRFPCRF


GPRSGPRS

CS Network

LTE, IMS, GPRS clients

VoiceHandover to CS

Sv

eMSC

LTE Data & Voice media

MMEMME

media is NOT interrupted

LTELTE

SGSN GGSN

33

11

PDNPDN

The Role of IMS The Role of IMS –– Provide Seamless & Efficient Anch or for HandoverProvide Seamless & Efficient Anchor for Handover

22

S-GWS-GW

IMS Centralized Services – Not Just Voice

Mobile CS Core EPC & MBB

A-SBC

xPON & FBB

A-SBC

I/S-CSCF

MMTELSCC: Service Continuity Control

eMSS for ICS &

SRVCC SIP

•Efficient anchor mechanism

•Ensures consistent service

•Ready for user migration

•Centralizes user’s services to save OPEX

HLR/HSS


LTE HGW

Fixed SIP Phone

CS/LTE Dual modeterminal

2G/3G

Roaming & Handover

The Role of IMS The Role of IMS –– Provide IMS Centralised Services for a Range of ApplicationsProvide IMS Centralised Services for a Range of App lications

Implementation options:• SRVCC IWF can be integrated in

MSC-Server or enhanced MSS• Centralized (in a separate NE) for

several MSC servers.

Policy Control Server

Single

Session ControlSession Control

ApplicationsApplications

Consistent Convergent Policy from the Core


xDSL/LAN IMS 2G/3G

BRAS SBC GGSN

LTE/SAE

PDSN UGW

CDMA 1XEvdo-Rev

SingleManager

The Role of IMS The Role of IMS –– Access Agnostic Policy and QoSAccess Agnostic Policy and QoS

Session Based QoS for Fine Tuning

• Absolute bandwidth as requested by devices

• Inefficient Input and Output• Expensive and not scalable

Connection Based QoSSimple ClassificationIntServ

QoS Control

QoS Control

• Controlled by edge devices• Relative Priority Policy only

Flow Based QoS DiffServRough Classification


Session Flow A

QoS Request

Session Flow B

Session Based QoS

• Controlled by Core server• Differentiated Policy with CAC • Per session, user and service• Best network resource usage

Precision Classification

IMSIMS

• Relative Priority Policy only• Cannot avoid congestion • Low precision control

QoS Control

PCRF

The Role of IMS The Role of IMS –– Finely Tuned User/Session based Policy Finely Tuned User/Session based Policy

End-to-End QoS

E2E QoS Functions Distribution

RAN EPCLTE UE IMS IP Network

E-UTRAN

MME

Rx

GxRadio Bearer QoSRadio Bearer QoS

Network Centric Unified Dynamic

QoS Control

IP Transport Network

Transport Bearer QoSTransport Bearer QoS

PCRF

P-CSCF

SAE Bearer QoSSAE Bearer QoS


• VQE functions, e.g. jitter buffer, etc

• Radio optimization tech for VoIP

• Service QoS request initiation

QoS FunctionsQoS Functions

• EPS bearer setup

• PCEF functions

• VQE functions

• QoS mapping

• IP filtering, traffic shaping, etc


• Radio resource allocation, packet scheduling, filtering…

• Radio optimization for VoIP


• PCC QoS policy/rules control

• Retrieve user QoS profile for Policy


• Enforce given policy & QoS profile

• IP transport QoS control and guarantee


S/P-GW

The Role of IMS The Role of IMS –– Provide open standard QoS E2EProvide open standard QoS E2E

BOSS

Challenges of Subscriber Data Management

Network Operations

Network Operations

AS AS AS AS AS AS AS AS AS


• Mesh provision connections• Complex provisioning

procedures• Long Time-To-Market • Inconsistent data,

duplications

Complex Provisioning

• Isolated ‘silo’ data, not open• Hard to deploy new services

and facilitate service innovation

• Difficult to share with other applications

Information Silo

• Many separate Databases• Complex IMSI/MSISDN

segment management

High OPEX

MMS SMSC AS SDP HLRAAA PCRF Other DB

The Role of IMS The Role of IMS –– Create Network Based Data Reposit oryCreate Network Based Data Repository

Status

Location

ID

Terminals

Access

Insight

Personal info

User Profile ID

Unified Data Base (back end)

Diverse Application (Front End)

…HLRFE

HLRFE

HSSFE

HSSFE

AAAFE

AAAFE

LDAPFE

LDAPFE

Open to External Parties

Unified Subscriber DB - Reliable, Unified and Open U ser DB


Create a 360°user profile

User Profile

Subscription information

APP DB IDmanagement

On-lineupdateOn-lineupdate

eGUPeGUP

The Role of IMS The Role of IMS –– Enable allEnable all--round user knowledge for context based applicationsround user knowledge for context based applications

External Data Source

Versatile Application Server for All Domains

TASATS9900

TASATS9900

ShShHSS

HLR MAPMAP

Profiles

ReachabilityReachability MMTelMMTel

Service Gateway

3rd Applications

HTTP/SOAP/SMPPHTTP/SOAP/SMPPAPIsAPIs

ICT IM

CCFOCS

RfRf

RoRo

Charging

Challenges

• Need to support CS-SMS, IP- SMS and web IM

Challenges

• Too many AS, many similar services for different domains


ISCISC

S-CSCF MRFC

MrMr

CrCr

ReachabilityReachability

IPIP--SMSSMS--GWGWIP CentrexIP CentrexICS: Service ICS: Service ContinuityContinuity

MMTelMMTel

SCP IMIM--SSFSSF

Legacy IN & NGIN

mAGCF/MSS

SIPSIP

RCSRCS

SMS

E/ GdE/ Gd

Converged Messaging

The Role of IMS The Role of IMS –– Supports common AS for Mobile/Fix ed, PES/PSSSupports common AS for Mobile/Fixed, PES/PSS

Challenges

• Need to keep VAS services going for a while yet

Challenges

• Must re-create CS services & provide service continuity

CS Domain

IMS

Messaging AS

Using IMS for Seamless Messaging over LTE

CSCF

PCRF

MMTel SCC AS

Rx

S7

ISC

ISC

SMSC

C/D

E/ Gd

SGi

S4S6a

Sh

Sh/J

Cx

HSS / HLR

SMS-IW-MSC

IM

IP-SM-GW

2 Transport Level Interworking

Transport Level Interworking

3 Service Level InterworkingService Level Interworking

PS Domain

Issues

• Need to support SMS on SGs (CSFB), IP-SMS and web IM, plus interworking


GPRSEPC

Solution

• IP-SM-GW functionality is mainly responsible for IM/SMS interworking

• Fully compliant with 3GPP (TS23.204) and OMA standards UTRAN

S-GW

P-GWMME SGSN

S1-US1-MME

S7

S3S11

PC Client with Datacard / dongle

GERAN

MGW

CS Handset

S6a

1Non-IMS ScenarioNon-IMS Scenario

The Role of IMS The Role of IMS –– Supports handover and session con trol for IP Messaging & SMSSupports handover and session control for IP Messag ing & SMS

E-UTRAN

Using IMS Functions for non-Voice

Monitoring

Location Services

Gaming

Video Streaming

Session ControlQoS

per service per user

User Profiles & service profiles


On-line Purchasing

Data Sharing

MessagingMicropayments

The Role of IMS The Role of IMS –– IMS based enablers supporting nonIMS based enablers supporting non--Voice servicesVoice services

Centralised Handover

Policy & Charging Rules

Secure Authentication

HSSHSSCSCFCSCF

IMSIMSPCRFPCRF

VoLTE /IMS are Complex? – Make it Simpler

Converged Data

Converged Fix/Mobile

Converged Session


Converged Services

Converged Provisioning

Converged QoS & Policy

Converged Charging

Converged platform

Converged Management

Converged Gateways

Converged Core

Single Core

►Voice for LTE technical issues have been essential ly resolved

►IMS plays a major role for session control, QoS/Pol icy and User Data

Conclusions


►IMS functions can support non-IMS LTE services too

►The key is to

Thank You!


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