Sumanta Saha sumanta@kth.se Royal Institute of Technology (KTH) As a - - PowerPoint PPT Presentation
Sumanta Saha sumanta@kth.se Royal Institute of Technology (KTH) As a partial fulfillment of the requirements of IK2555 Rationale Behind Integration g IP Multimedia Subsystem (IMS) is a service delivery architecture architecture Converged
As a partial fulfillment of the requirements of IK2555
IP Multimedia Subsystem (IMS) is a service delivery
Converged IP Messaging (CPM) from OMA is a
Hypothesis: Delivery of a service from an established
Accelerate deployment
S (b i !)
Save money (business!)
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Problem description
Identify key service delivery modules of IMS Analyze and identify enablers needed for CPM Pinpoint the intersection between the above two Propose an integration model to deploy CPM over IMS Elaborate advantages from business perspective
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Converged services typically encompass several
Need various enablers to do this
Need a core network to glue the components together IMS is an All‐IP service delivery platform Several enablers and interfaces have been already
Can we reuse some of those in CPM?
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Proper integration of CPM with IMS offers
A l t d d l t
Accelerated deployment Interworking
C i
Cost cutting
Early integration thoughts would save huge
Well defined integration interfaces make CPM a
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CPM architectural development work still under way
O l fi t d ft h b l d l t i
Only first draft has been released, no complete version
OMA CPM AD 1st Draft, Converged IP Messaging
Architecture Document, v1.0, Feb 2008 , ,
IMS received plenty of attention and research work
Almost fully standardized and practically deployed
Almost fully standardized and practically deployed
3GPP TS 23.228, IP Multimedia System (IMS) stage
2, v8.3.0, 3GPP R8, Dec 2007 Service delivery platform: (Gourraud C., 2007), (Kim
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Review standardization documents of IMS (3GPP) and identify
reusable modules
Architecture document Technical Specification Enabler specifications
p
Review standardization documents of CPM (OMA) and identify
areas of integration
Work Item document Architectural document Technical specification
Methodology of integration from past works with IMS Methodology of integration from past works with IMS Proposal of a new integration scheme between IMS and CPM Feasibility study
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SIP/IP core: Have components like CSCFs that acts as
Presence: With modules like PUA and PW IMS can
AAA: Built in support for AAA via diameter protocol
Session Management: Session mobility control with
PoC: IMS implements PoC service as one of the
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CPM
Conversation Server
CAB Media Storage Enablers
IM
IM PoC Mobility Mobility Interworking Presence
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IMS Routing Support using IMS SIP/IP core
Presence Support using IMS Presence module Authentication, Authorization, Accounting using IMS
Session Mobility using IMS SIP mobility and session
Media type negotiation using IMS transcoder, MGW,
Voice support using IMS PoC enabler
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CPM is a brand new service from OMA to enhance
Delivering CPM from a true All‐IP platform like IMS
An integration model was proposed which would
The standardization effort to finalize CPM
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