End-to-end User-centric session with QoS continuity

Speaker: Yijun WUNoëmie SIMONI

TELECOM ParisTechComputer of Science and Networks Department © ETSI 2009. All rights reserved

STF 360

STQ Workshop - 1 & 2 July 2009

Index

� Requirements of user-centric session� Specification---User case and scenarios� QoS control and management in ETSI and 3GPP (Sequen ce

diagrams)� Proposition: QoS continuity

2

� Accessibility of the service using any terminal according the user preference

� User-centric session for the user’s workflow (One

User centric QoS requirements

3

user’s workflow (One session for different services)

� Dynamic selection of connectivity.

� Personalization of the service � Composition of service� User’s preferences

Specification---User case

Home Network Environment

1

2

Horizontal handover S

ervice brokerS

CIM

IMS

CN

1

AN 1

AN 2

One session

8:30h

AS22

AS13

SP1

SP2

CNG

AS12AS33

AS11 AS31

4

Office

Service layer

User centric end-to-end session (QoS continuity acc ording to user’s preference)

Terminal mobilityApplication Server(Service mobility)

Service orchestration

User mobility

CN

3

Heterogeneous network(access and core network )

Horizontal handover

(within same access network )

Media dataAS: Application ServerAN: Access NetworkCN: Core NetworkSP: Service provider

Vertical handover(between heterogeneous accesses)

AN 2

One session

11h

AS22

Service broker

SC

IM

IMS

CN

2

AS11 AS31

AS23

AN 3

CPE

Scenario 1 (User mobility)

Initiator: TerminalDecider: Access networkExecutor: Access network

5

PDP sessionSIPDiameterOthers

Scenario 2(Service mobility/User mobility/ vertical handover)

Gm

IMS

Core

S-CSCF

I-CSCF

Rxe2 Gq’

SP1

AS33

SP2

AS11 AS31

AS22

S-CSCFI-CSCF

ISC

IMS

Core

UPSF

CxCx

UPSF

P-CSCF

AS12ISC

Initiator: ASDecider: NetworkExecutor: Network

6

Gm

GGSN

AN

e1

SGSN

BTSUm

Iu-ps

RNC

Iub

NASSe4

CPE

E3(CW

MP)

a1/a

3

Access network IP Backbone

C-BGF I-BGFIP-edgeABG

AN

e1

e1

Re

Ia(H

.248

)

Ia(H

.248)PDP context

QoS tunnel QoS tunnelQoS tunnel

RACS

Gx

PCRF

SIPDiameterOthersPDP session/Connectivity session

Scenario 3(Terminal mobility/Horizontal handover)

Initiator: Access NetworkDecider: Access NetworkExecutor: Access Network

7

PDP sessionSIPDiameterOthers

NGN QoS control (ETSI TISPAN/3GPP)

NASS

AF(e.g. P-CSCF)

A-RACF SPDF

1AuthenticationAutorisationConfiguration

2GmService Request(e.g. SIP INVITE)

3

Resource and policy Request

RACS4

ISC

Gq+e4

Re Ia

8

UE BGF AS

Resource and policy Request

5Policy and resource enforcement

UE

AF(e.g. P-CSCF)

PCRF

GGSN(PCEF) AS

2

3

5

GxPolicy Request

RxPolicy Request

1 GmService Request(e.g. SIP INVITE)

AuthenticationAuthorisationConfiguration

ETSI TISPAN

3GPP

4

Policy and resource Enforcement

SIPDiameterOthers

ISC

IP-Edge

Re Ia

AAA Server

ETSI QoS Control: NASS authentification 1

UE NACFAMF UAAF CLF RACS

1. PPP setup

2. Access request

3. Access response

4. Configuration

request

5. Network location info

6. IP address and other

configuration info7. PPP response

8. DHCP INFORM

and Option 1209 Network location

P-CSCF I-CSCF UPSF S-CSCF

NASS

9

and Option 9. Network location

info request

10. Network location info

11. Network location

info reponse

12. DHCP response (P-

CSCF address)

13. Register

14. CLF Query (IP Address)

15. CLF Response (Location info)16. Register (P-

Access Network-info)17. UAR

18. UAA

19. Register (P-Access Network-info)

20. MAR

21. MAA

(Line-ID)22. SAR

23. SAA

24. OK

S-CSCF selection

User profile check

Compare line ID

SIPDiameterOthers

ETSI QoS Control : Service request, resource reserva tion, policy control

UE IP Edge SPDF P-CSCF S-CSCF ASABG UPFS

8. Invite

9. 183

progress

C/I-BGF NASS A-RACS

1. SIP Invite

2.Invite

NASS Authentification & Network attachment

6.SAR

User profile data

7. SAA

RACS

NASS User profile

information sent over the

I-CSCF

3. LIR

4. LIA 5. Invite

Get the informations of

the connection

downlink from media

description in the SDP

52

10

SIPDiameterOthers

Determines whether the

request information received

from the application function is

consistent with the policy rules

defined in the SPDF.

progress10. 183

progress

Define service

information

11. Diameter

AAR

14. Diameter

AAA

Media (RTP)

Resource admission control

Access profile

push

12.Admisssion

Request

Request resource

Cnf13. Response

admission control

e4 interface comprises

QoS profile information

and initial gate setting

information.

18. Open gate

Open gate

17. Diameter

AAR

15. Offer

response

20. Diameter

AAA

16. Response

conf (opt SDP)

21. 200 OK

19. Open gate

response

Bgf_reqBgf_Cnf

3GPP QoS control 52

UE GGSN(PCEF) PCRF P-CSCF S-CSCF AS12SGSN

3. Invite

(SDP)

4. Invite

HSS

7. Invite

1. GMM

attachment2. Active PDP

context Invite:

Session transfer ID

<destination address>

Via: <UE IP>

Route: <P-CSCF address>

...

SDP: <Caller supported codec list>Get the informations of the

connection downlink from

media description in the

SDP

I-CSCF

5. LIR

6. LIA

11

Check service information. Compare

with the policy rules of operations

and authorize the QoS resource and

give authorization token to P-CSCF

19. CCA

11. 183

progress12. 183

progressDefine service information

13. Diameter AAR: Request the authorization token and service information

14. Diameter

AAA

20. Active PDP context

response21. Response

Media (RTP)

8. SAR(Service

assignment req)

9. SAA10. Invite

The capabilities of the AS

returned along the signalling path, in

a 183 (Session Progress) provisional

response.

Mapping SDP QoS parameters to

UMTS QoS parameters

16. Active PDP context request

(contain binding infos)17. Create PDP context request

(contains binding infos)18. CCR

Mapping authorized IP QoS parameters to

authed UMTS QoS parameters Compare

UMTS QoS in PDP context and the authed

parameters

15. Offer

response

SIPDiameterOthers

Proposition: QoS continuity

� Five dimensions� Architecture : 4 layers (User, Terminal, access/cor e network and

service layer), 3 elements (Node, Link, Network)� Organization : Initial/decision/execution� Protocol : session based, session binding, cross la yers (service,

transport, user), interface converged,� Information: Infoware (operator’s database +) and I nfosphere (User

12

� Information: Infoware (operator’s database +) and I nfosphere (User profile), QoS model (4 criteria et 3 values)

� Function: Dynamic Management and control of QoS

Core Core

Service networkService network

End-to-end U

ser centric Session

End-to-End User centric session QoS signaling

QoS signalling

13

Access Network 1

Seamless Userware

Access Network 2

Access Network 3

Core Network Network

InfosphereAmbientGrid

end User centric S

ession

VPSN: Service and network integration

VPSN VSC

X

QoS signalling

14

Sub-Networks

X

VPSN: Virtual Private Service Network

VSC: Virtuelle Service Community

QoS signaling trigger events

� State Change Events� QoS in contract� QoS out contract� QoS Parameters Modification

� QoS Going Down In contract

15

� Service Initiated Events

contract

ModificationQoS going-

down

Out contract

QoS negociation

Service

Demanded QoSService

Offered QoS

Negociation

Desirable QoS

Request

Capable QoS

Offer

16

User Provider

Perceived QoS

ServiceAvailabilityReliabilityDelayCapacity

Core networkFour criteria

AccessNetworkFour •criteria Terminal

•Four criteria

Contracted QoS

Provided QoS

ServiceAvailability Reliability DelayCapacity

Core networkFour criteria

AccessnetworkFour criteria Terminal

Four criteria

Infosphere

UPSF+/HSS+

Procedure of flow 1: User initial

Information update

1

Gx+

Cx UPSF

e4

Binding information User data

Binding informationAuthorized QoS

NASS

InitiatorDeciderExecutor

S-CSCF

NegotiationNegotiation

2

3 8

User data

AS

AF

AS

Infosphere

AS

P-CSCF

In/Out contract

17

UserRe

e4Binding informationAuthorized QoS

Resource reservation

Authorized IP level QoS

Binding information

Requested IP level QoS

Compare and to enforce

6

Request and binding information

access profile

9

User data

4

57

User data

SIPDiameterOthers

Network node

RACSInfosphere

Service Session

PDP Context 1

UE 1

Media component informationGCID, GGSN address, Bearer Type 1, etcSession and UE informationSession IDEquipment ID,QoS & Charging conditions

Media component information

UEinformationEquipment ID,Session IDI/O Information (Bearer address)User informationUser IDQoS & Charging preference

Service level informationSCID,Service ID,SLA, etcSession level informationSession IDQoS&

UE 2

Session binding

18

IMS Session

PDP Context 2

Session level information

ICID, Session ID,etc Service, Media component information ans UE informa tionService ID, SDP data, Equipment ID, etc

Media component informationGCID, GGSN address, Bearer Type 2, etc.Session and UE informationSession IDEquipment ID,QoS & Charging conditions

QoS&Charging conditions

UEinformationEquipment ID,Session IDI/O Information(Bearer address)User informationUser IDQoS & Charging preference

End-to-End User-centric Session Binding

Conclusion

� We identify the scenarios representing and concerni ng to the NGN context (Heterogeneity and mobility) through a user case.

� We study the QoS aspects in an E2E user-centric session from user’s view.

19

session from user’s view.� We isolate and identify the components who play the

important roles for interworking between service an d user in order to QoS continuity

� We propose the QoS signalling in the service layer (VPSN) and cross-layered session binding for the Qo S continuity.

End-to-End User-centric session with QoS continuity

� We identify the scenarios representing and concerni ng to the NGN context (Heterogeneity and mobility) throug h a user case. We study the QoS aspects in an E2E user-centr ic session from user’s view. We isolate and identify t he components who play the important roles for interwo rking between service and user in order to QoS continuity .

20

between service and user in order to QoS continuity .� Key words: User-centric session, QoS continuity, IM S (SIP,

Diameter)� Speaker: Yijun WU