Q 113 NGN Initial Considerations NGN difficult to
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Q 1/13 - 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 1
Vertical considerations Management Plane Control Plane User Plane Application Related Layer(s) Management Plane Control Plane User Plane Switching/Routing Related Layer(s) Management Plane Control Plane User Plane Transmission Related Layer(s) 3 Layers - Terminology? 2
Horizontal considerations - Service Separation Application Server Users Switched Access Network(s) Transport Protocol Interworking Single point Or Distributed Application Server Switched Core Packet Network(s) Switched Access Network(s) Users Transport Protocol Interworking Separation of Services from Network 3
Protocol Layering considerations Service Mapping & Protocol Translation Protocol X Service Mapping & Adaptation Protocol Z Peering Relationship Layering Relationship Protocol Y No particular prescribed protocol hierarchy: Any X over any Y 4
Protocol end point terminations P 6 N+2 P 4 N+1 P 5 N+1 P 1 N+1 P 2 P 3 N N A B C D End-to-end is a relative term 5
Functional Architecture Considerations 6
Functional Architecture Considerations ETSI Model 7
Transport Convergence 8
Identification and Location Device Mobilty Domain User/Service Mobilty Domain Network Legend: Points of Attachment (POA) fixed or wireless Communications Objects (mobile with transient binding to POA) Transient Binding (mobile with transient binding to device/service) 9
Q 1/13 - 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 10
