muse confidential broadband europe 2007 we3a.3 document:an implementation of application layer based...
TRANSCRIPT
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
Broadband Europe 2007 We3A.3 — 3
>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
Broadband Europe 2007 We3A.3 — 4
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
Broadband Europe 2007 We3A.3 — 5
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
Go(COPS)
Transport provider
SIPSIP SIP
Gq
PEP
SIP
TISPAN 3GPP
MRFC
MRFP
Mp (H.248)
SIP THIG
MS-ER
Broadband Europe 2007 We3A.3 — 6
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
Broadband Europe 2007 We3A.3 — 7
> 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
Broadband Europe 2007 We3A.3 — 8
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
Broadband Europe 2007 We3A.3 — 9
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
AccessNetworkAccessNetwork
AccessNetworkAccessNetwork
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
Broadband Europe 2007 We3A.3 — 10
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
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!
Broadband Europe 2007 We3A.3 — 11
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:
Broadband Europe 2007 We3A.3 — 12
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
Broadband Europe 2007 We3A.3 — 13
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
Broadband Europe 2007 We3A.3 — 14
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
Broadband Europe 2007 We3A.3 — 15
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
Broadband Europe 2007 We3A.3 — 16
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
Broadband Europe 2007 We3A.3 — 17
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
Broadband Europe 2007 We3A.3 — 18
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
Broadband Europe 2007 We3A.3 — 19
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)