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TSG-X PSN Evolution cdma2000® Brazil Workshop 25 October 2006 Le Meridien Copacabana Rio De Janeiro, Brazil PSN Evolution • PSN began evolution discussions upon formation of SCATE ad hoc • Separate technical report aligning with SC-ATE began in Feb. 2006 in order to focus discussions at a more detailed level: – Radio Access Network – IP Gateway – Core Network • Key Issues align with SC-ATE – PSN focus is at a more detailed level Aug 09, 2006 DRAFT 1 PSN Evolution • Objectives – Identification of • new technological and market demands on the network • architectural improvements • evolving technologies that may enable architectural change that was previously not possible or practical – Proposal for Evolved Architecture • Including Radio Access Network and Packet Switched Network • Addressing IMS architecture only inasmuch as needed to interwork Aug 09, 2006 DRAFT 2 PSN Evolution What is Driving the Need for Change – Increased need to support real-time services over the packet data network • Migration of circuit services to the packet data network • QoS requirements for highly delay sensitive applications • Need for low overhead over the transport network as well as over the air – Support of multiple access technologies • Inter-technology roaming • Inter-technology mobility – Seamless service mobility Aug 09, 2006 DRAFT 3 PSN Evolution • The PSN Technical Evolution Framework (TEF) focuses on the Packet Switched Network with emphasis on: – Access Independence in the Packet Switched Network • Isolation of Access Specific functions – Transport Efficiency – Flexibility • Architectural Considerations include examination of – Evolving network topologies • Must support the delivery of services across both hierarchical and flat topologies, including a mixture of both – Evolving technologies, including access, backhaul, etc. • Must accommodate both the legacy style point-to-point backhaul as well as a connectionless network in the RAN • Subscribers will require access to the same services regardless of the access technology being used – Functional Decomposition of the packet data network • Which functions can be access independent Aug 09, 2006 DRAFT 4 PSN Evolution • Challenges – Decomposing Existing Functions in the Network – Creating a division between Access-Independent and AccessSpecific Functions • Alignment of Access-Independent Functions across SDOs • Aligning with the direction of other SDOs in order to facilitate accessindependence – Maximizing advantages of advancements in transport technologies while providing flexibility in the access network Aug 09, 2006 DRAFT 5