Embed Size (px)
DESCRIPTION
SIP services in a distributed architecture : feedback from implementation and trial. [email protected] [email protected] [email protected]. Agenda. Global feedback Developed services Some issues Next step. Global feedback: SIP engineering. - PowerPoint PPT Presentation
Citation preview
D1 - SIP’03
SIP services in a distributed architecture : feedback from implementation and trial
France Telecom R&D D2 - SIP’03
Agenda
s Global feedback
s Developed services
s Some issues
s Next step
France Telecom R&D D3 - SIP’03
Global feedback: SIP engineerings SIP is suitable for developing/deploying advanced
services
s SIP can be implemented in a complex multi-actor environment
France Telecom R&D D4 - SIP’03
s Moving towards maturityQReliable productsQCustomizable (e.g. for provisioning)QService creation potential
s Good performanceQShort duration for call establishment QEven within a fully distributed architecture
Global feedback: current state of industry
France Telecom R&D D5 - SIP’03
Developed services: examples (1)
s MediAddQAdd a new medium during a communication
–Example : Call with a phone then add video on a PC
s Customized Call Routing (CCR)QCallee unavailable
–Choices proposed to the caller to join the callee– Call redirection, email, SMS, IM…
QProposed choices–Depend on caller identity–Depend on callee presence and availability–Are set up by the callee
France Telecom R&D D6 - SIP’03
CCR
Developed services: examples (2)Ms Durand wants to call Ms Dupont
Ms Durand
Ms Dupont Secretary
Establish a call
Set up of a rule :
If Caller is Ms Durand
And I’m not available
Then indicate :
“I’m sorry but I’m not available now”
And propose :
-To forward the call to my secretary
-To leave a voice mail
-To send an e-mail
And notify me by e-mail
France Telecom R&D D7 - SIP’03
CCR
Developed services: examples (2)
Ms Durand
Ms Dupont Secretary
Present Not available
Presence of Ms Dupont ? Availability of Ms Dupont for Ms Durand ?Which services for Ms Durand ?
I’m sorry but I’m not available now.
You can :
-forward the call to my secretary
-leave me a voice mail
-send me an e-mail
France Telecom R&D D8 - SIP’03
Developed services: architecture (1)
PSTN
NCP
GSP
USP
enterprise
InternetIntranet
SIP Interconnection
Network
Complete SIP serviceexecution environment
Common provisionning
Unitary provisionning
Unitary SIP service
Complete SIP serviceexecution environment *
Common Provisionning *
GSP: Global Service Provider
USP: Unitary Service Provider
NCP: SIP Network Connectivity
Provider
France Telecom R&D D9 - SIP’03
Developed services: architecture (2)
EP
CRP
CRP CRP
CRP
EP
EP
EPPP
PSTN
EP SP
Portal
DNSEP
GW GW
Enum
EP SS
Web
SSNCP
GSP
USP
enterprise
InternetIntranet
SP: Serving Proxy
EP: Edge Proxy
CRP: Core Routing Proxy
PP: PSTN Proxy
SS: Service Server
services
France Telecom R&D D10 - SIP’03
EP
CRP
CRP CRP
CRP
EP
EP
EPPP
PSTN
EP SP
Portal
DNSEP
GW GW
Enum
EP SS
Web
SSNCP
GSP
USP
enterprise
InternetIntranet
SP: Serving Proxy
EP: Edge Proxy
CRP: Core Routing Proxy
PP: PSTN Proxy
SS: Service Server
services
Developed services: architecture (2)
France Telecom R&D D11 - SIP’03
… Some issues
s Service triggering
s ID/Authentication
s Charging & provisioning
France Telecom R&D D12 - SIP’03
Service triggering
s Lack of products allowing service triggering in a distributed environment
s Implementation: Call redirection to AS based onQCPL scripts in Serving proxies and per userQTriggering criteria = CPL switchesQRouting to the corresponding ASQNot optimal : only one AS is invoked
s Loop detectionQIn case of call continuationQResolved with 2 proxies consulting the same registrar
France Telecom R&D D13 - SIP’03
Loop detection
EP
CRP
CRP CRP
CRP
EP
EP
EPPP
PSTN
EP SP
Portal
DNSEP
GW GW
Enum
EP SS
Web
SSNCP
GSP
USP
enterprise
InternetIntranet
SP: Serving Proxy
EP: Edge Proxy
CRP: Core Routing Proxy
PP: PSTN Proxy
SS: Service Server
services
INVITE sip:[email protected]
INVITE sip:[email protected]
INVITE sip:[email protected]
LOOP detected
France Telecom R&D D14 - SIP’03
Id / Auth: needs & issues
s SIP Network Connectivity Provider levelQNCP is close to the Internet Access & Backbone providersQNetwork Policy requested by the NCP instead of the service providers
s Service provider levelQService invocation
s Auth. difficult in our implementationQLocation of the Registrar serverQTrust domains (RFC 3324)
France Telecom R&D D15 - SIP’03
Authentication issue
SP SS
SP: Serving Proxy
EP: Edge Proxy
CRP: Core Routing Proxy
PP: PSTN Proxy
SS: Service Server
INVITE sip:[email protected]
407 : Proxy Authentication Required
INVITE sip:[email protected] sip:[email protected]
INVITE sip:[email protected]
407407
407
Authentication error
France Telecom R&D D16 - SIP’03
Provisioning / Charging / OAM
s Distributed model
s ProvisioningQCommon GUI
s Charging QBreakdown/settlement mechanisms to be defined
s OAMQUnified alarms for global CRM
France Telecom R&D D17 - SIP’03
Next steps Today: products
Qproxies, AS…
s Tomorrow: actors Qservice providers, routing providers, mobile providers, presence providers
s Actor interconnection:
@ Internet at the network level
z At the routing + service level ?peer to peer SLAglobal infrastructure ?
France Telecom R&D D18 - SIP’03
Thank You !
![[MS-SIP]: Session Initiation Protocol ExtensionsMS-SIP].pdfSession Initiation Protocol Extensions SIP. . SIP message.](https://img.pdfslide.us/doc/110x75/5e7f8669844925290d6f8357/ms-sip-session-initiation-protocol-extensions-ms-sippdf-session-initiation.jpg)
