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 IP Messaging (CPM) from OMA is a converged service converged service � Hypothesis: Delivery of a service from an established service delivery platform will service delivery platform will � Accelerate deployment � Save money (business!) S (b i !) 2

Objectives and Outline j � Problem description � Identify key service delivery modules of IMS Id if k i d li d l f 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 3

Problem Formulation � Converged services typically encompass several methods of similar communication together methods of similar communication together � Need various enablers to do this � Need a core network to glue the components together N d k l h h � IMS is an All ‐ IP service delivery platform � Several enablers and interfaces have been already standardized with IMS � Can we reuse some of those in CPM? 4

Problem Statement � Proper integration of CPM with IMS offers � Accelerated deployment A l t d d l t � Interworking � Cost cutting C i � Early integration thoughts would save huge architectural development effort hi l d l ff � Well defined integration interfaces make CPM a Pl Plug ‐ n ‐ Play service Pl i 5

Standards and Related works � CPM architectural development work still under way � Only first draft has been released, no complete version O l fi t d ft h b l d l t i � 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 P. et al, 2005), (Friedrich O., 2007) 6

Research Methods � 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 7

IMS: A Service Delivery Platform y 8

IMS: Key Reusable Modules y � SIP/IP core: Have components like CSCFs that acts as SIP routers SIP routers � Presence: With modules like PUA and PW IMS can provide presence information provide presence information � AAA: Built in support for AAA via diameter protocol � Session Management: Session mobility control with S i M S i bili l i h SIP core � PoC: IMS implements PoC service as one of the l f h Application layer services 9

Converged IP Messaging g g g � CPM Conversation Server � CAB � Media Storage � Enablers � IM IM � PoC � Mobility � Mobility � Interworking � Presence 10

Proposed Key Areas of Integration p y g � IMS Routing Support using IMS SIP/IP core � Presence Support using IMS Presence module P S i IMS P d l � Authentication, Authorization, Accounting using IMS AAA module AAA d l � Session Mobility using IMS SIP mobility and session splitting li i � Media type negotiation using IMS transcoder, MGW, MGCF � Voice support using IMS PoC enabler 11

Proposed Integration Model p g 12

Summary of Work y � CPM is a brand new service from OMA to enhance user experience in messaging domain user experience in messaging domain � Delivering CPM from a true All ‐ IP platform like IMS reusing the platform’s modules was the main target of g p g the work � An integration model was proposed which would decrease the deployment time and effort and thus cut the deployment cost � The standardization effort to finalize CPM Th d di i ff fi li CPM architecture can also be decreased if the integration model is kept in mind model is kept in mind 13

Th Thanks to All! k All! Questions? 14