Q1/13 - NGN Initial Considerations • NGN difficult to define in terms of: • specific technologies • specific architecture • topology • Need to avoid technology traps • Identify high-level paradigms • separation of concerns • Identify emerging NGN-generic issues • Architectural principles • OSI model relevance • Need for NGN models to show separation of concerns

Vertical considerations Control Plane Management Plane User Plane Application Related Layer(s) Control Plane Management Plane User Plane Switching/Routing Related Layer(s) Control Plane Management Plane User Plane Transmission Related Layer(s) 3 Layers - Terminology?

Horizontal considerations - Service Separation Application Server Switched Core Packet Network(s) Access Transport Protocol Interworking Single point Or Distributed Users Separation of Services from Network

No particular prescribed protocol hierarchy: Protocol Layering considerations Service Mapping & Protocol Translation Protocol X Protocol Z Service Mapping & Adaptation Peering Relationship Layering Relationship Protocol Y No particular prescribed protocol hierarchy: Any X over any Y

Protocol end point terminations B C D End-to-end is a relative term

Functional Architecture Considerations

Functional Architecture Considerations ETSI Model

Transport Convergence

Identification and Location Network Device Mobilty Domain User/Service Mobilty Domain Points of Attachment (POA) fixed or wireless Communications Objects (mobile with transient binding to POA) Transient Binding (mobile with transient binding to device/service) Legend:

Q1/13 - NGN Initial Considerations • Identify high-level paradigms • Separation of concerns, services from networks • Service Platform approach • Identify emerging NGN-generic issues • Architectural principles • OSI model relevance • Need for NGN models to show separation of concerns via functional architectures • Access/Core Separation • Competitive Access to Services • “Access Network” to include switching/routing • Multiple transport technologies, Ethernet, ATM, IP, MPLS in various combinations • Global Mobility/Roaming (fixed and wireless networks) • Need for new name/naming resolution mechanisms