Muse confidential Broadband Europe 2007 We3A.3 Document:An Implementation of Application Layer based...

Muse confidential

Broadband Europe 2007 We3A.3

Document: An Implementation of Application Layer based continuous Mobility for Conversational Services

Date: 2007-12-05Originator: Stefan Wahl, K. Oberle, M. Stein, J. Riemer,

C. Peña (TID Telefonica)

Broadband Europe 2007 We3A.3 — 2

Agenda

> The Multi-Service Edge Router Concept (MS-ER)

• A single node to deploy IMS: The MS-ER

> Seamless Session Mobility across Devices and Technologies

> Demonstrator

> Conclusions


>Single comprehensive IMS network element• building a cluster (grid style) of distributed call and application

server– with architecture inherent load balancing and redundancy,– flexibility and scalability on (sub-) function level– with preference for local and focused processing

• IMS P/I/S-CSCF– with improved intra cluster signaling efficiency– reduced number of message flows through combined functions

• Media processing• MS-ER cluster is fully IMS compliant

Multi-Service Edge Router (MS-ER)

IP Transport

Stream Switching

Media Processing

Session Signaling

App. Server

User-Network- Interface

SOAPSIP

P2P-SIP

Middlewareincl. inter MS-ER

resource management

PSTNGW

Media Server

AS

Optimized calland control flows;

inherent protection system IP Transport

Stream Switching

Media Processing

Session Signaling

App. Server

MS-ER node

MS-ER node

flavors of MS-ER nodes

MS-ER node

MS-ER domain


Multi-Service Edge Router (MS-ER)

SIP

SIP

MS-ER Domain

MS-ERNode

MS-ER Node MS-ER Node

SIP

MS-ER Node

MS-ER Node

Interface:SIP

marshalling,Serialization,IP transport

Interface:SIP un-

marshalling,Parsing,security,

IP transport

SIP

SIP

Object Oriented Method Invocation

Intra MSER domain message exchange:

binary message object representation of the

SIP message

Grouping of IMS control functions

Integration of Media Layer

functions

IntegratedApplication

Layer functions


IMS architecture 3GPP Rel6+ Tispan IMS Rel 1 (PES not included)

AS

Access Network Visited Network Home Network Inter domain

Application provider

Call Control providerP-CSCF I-CSCF S-CSCF

SG

W

I-CSCF

3rd-Party

SIP

SIP

SG

WSG

WSG

W

HSS/UPSF

IBC

F IBC

F

IWF IWF

I-BG

F

I-BG

F

SPDF

Gq’

A-RACF Rq (Diameter)

C-BGF

Ia (H.248)

RCEF

Re (Diameter)

RACS

NASS

CPE

xDSL

SGSNGGSN

UMTS/GPRS

PDF

Go(COPS)

Transport provider

SIPSIP SIP

Gq

PEP

SIP

TISPAN 3GPP

MRFC

MRFP

Mp (H.248)

SIP THIG

MS-ER


Multi-Service Edge Router Cross Domain Mobility Solution for FMC

Crossdomain sessionmobility

IMS CoreDomain 1

Domain 2

ASASAS

AS

IP Transport

Session Signaling

Media Processing

Stream Switching

Service logic for seamless

session mobility control

Service logic for joint mobility

detection

Foreign Network

Distributed AS and MRF enable cross domain

seamless session mobility

Distributed AS and MRF enable cross domain

seamless session mobility


> Less processing of SIP messages and less signaling• Significant portion of the SIP messages between P-, I- and S-CSCF

and AS can be processed within one MS-ER network node using a fine-tuned intra MS-ER protocol

• Inter MS-ER network element signaling and control messages usean optimized MS-ER internal protocol. inter MS-ER protocol

> High scalability for signaling and IN like applications, like TeleVoting• Load balancing which prefers local processing

but can smoothly shift in a fine grained way processing (sub-)tasks to other MS-ER nodes

> Network architecture inherent redundancy solution• Inherent structural redundancy and load balancing

> Less management effort• One single breed of box.

Advantages of MS-ER


Agenda




> Demonstrator

> Conclusions


Seamless Session Mobility across Devices and Technologies Application Layer Mobility

Terminal Mobility

AccessNetworkAccessNetwork

L2mobility

e.g. GSM- same device- same access technology

IP-basedNetworkL3

mobility+

Session Mobility



e.g. WLAN

e.g. xDSL

Mobile IPTechnologies

- same device- different IP-based access technology

.. allowsService

Adaptations

MIPcompliant +

complementary

Access Network +Technology

AgnosticPOTS/

ISDNPOTS/

ISDN

WLANWLAN

WiMAXWiMAX

GSMEDGEGSM

EDGEServicesServices

S-CSCFS-CSCF

I-CSCFI-CSCF

P-CSCFP-CSCFIMS

ServicesServices

MobilityManagement

MobilityManagement

IMS Services

DBDBServicesServices

HSS/HLR

HandoffHandoff

IP basedNetwork

WirelinexDSL

WirelinexDSL

Appl. Layer

mobility

+++

Personal Mobility

- different devices- different access technology

ApplicationLayer

Mobility


Seamless Session Mobility across Devices and TechnologiesScenario Description

SIP ClientTerminals

GSM

GW

Bob

IMX

GSM network

Pa2Pa MGW Call setup to [email protected]

MS-ER

[email protected]

e

seam

less

pers

onal/se

ssio

n m

obili

ty

MS-ER

MS-ER

MS-ER domai

n

This Seamless Session Mobility Solution protects Alice‘s privacy!


Seamless Session Mobility across Devices and TechnologiesApplying an AS controlled conferencing or T-media module

MSERT-Media Module

Step 1:

Bye

bi-directional audio/video streams

Step 3:

copy audio/video stream

Step 2:


Agenda




> Demonstrator

> Conclusions


DemonstratorMotivation for the Mobility Demonstration

Two possible demonstrations

> Optimized Call Flow Efficiency on a MS-ER domain• requires huge hardware installations• demonstration of efficiency only with measurement

equipement

Feature is unattractive for demonstration butattractive to show simulation results

> Seamless Session and Personal Mobility across devices and different technologies• Mobility logic within the MS-ER controls the seamless

session/personal mobility• Mobility to non-IP/SIP technologies (e.g. GSM)• Media processing


Seamless Session Mobility across Devices and TechnologiesDomains involved in the demonstrator

SIP2IMSGW

MS-ERDemonstrator

(xCSCF, AS & MGW)

HSS

IETF SIP[RFC 3261]

Diameter Cx [TS 29.228]

3GPP SIP[TS 24.229]

SIP2IMSGW IETF SIP

[RFC 3261]

3GPP SIP

GSM/SIPGW

GSM

SIP2IMSGW

IETF SIP

Alice‘sdevices

Bob‘sdevice


Seamless Session Mobility across Devices and TechnologiesDemonstrator: Mobility trigger

bladeHSSA7720/A5350

SIP2IMS

P-CSCF

I-CSCF

S-CSCF

AS: Mobility Comp.

MEGACO cl

MEGACO srv

MEGACO (Add [A], Subtract [S], Modify [MF])

MGW*(MSW)

1

2

3

„INVITE Bob“ mobility trigger

BobAlice


Multi-Service Edge Router

A5350 Application Server Runtime

A7720 AccessBorder Control

R&I SeamlessSession MobilityService

Seamless Session Mobility across Devices and TechnologiesDemonstrator Architecture (with call legs)

R&I SIP2IMS GwR&I SIP2IMS Gw

Fraunhofer module

Alcatel-Lucent module

IMS functional entity

functional entity

Interface (IMS type)

Fraunhofer HomeSubscriber Server

Media Stream Switch

HSS

SIP(ISC) IMS AS

H.248

IETF SIP[RFC3261]

RTP/RTCP(Mb)

IETF SIP[RFC3261]

H.248 MGW RTP/RTCP(Mb)

S-CSCF

P-CSCF

I-CSCF

SIP (Gm)

SIP (Mw)

SIP (Mw)

SIP2IMS

Diameter(Cx) HTTP

(Ut)

Alice Bob


Seamless Session Mobility across Devices and TechnologiesDemonstrator Set-up at TID (only MS-ER)

NSP1: 201

NSP2: 202

MGNT: 4093Service Plane

ISAM 7302

0/10

1

2

3

0/6

201

e1 e4

e5e20/7

202

12.1.2.2/24

11.1.2.2/24

e3

4093

e6mirror

SIP phone

SIP phones

IMX

P2P MGW

MSER23.1.1.2/24

0/3

e0

0/4

0/2

Alice 1

Bob

Alice 2

Home 1

Home 2

MNG

AggregationSwitch

Edge Router


Agenda




> Demonstrator

> Conclusions


Conclusions

> Multi-Service Edge Router (MS-ER) features • increase the overall message efficiency• scalable application support• architecture inherent redundancy solution• simplified network architecture

> Application Layer Session Mobility• access network technology agnostic solution• device and access network depending media adaptations

(e.g. voice only voice and video)

> Demonstration of a homogeneous seamless session mobility solution across • physical devices and • access network technologies (GSM, IP-based)

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