Evolution to A Common Core

Transcription

1 Evolution to A Common Core Interworking Access Networks Mike Dolan April 2008

2 Outline Current Situation Multiple Core Networks Commonality at the Application Layer, IMS Converging on a Common Core Network Operators Can Pick and Choose Access Networks Interworking of Access Networks Experience in Building LTE-HRPD Interworking Toward the Future 2 Evolution to a Common Core April 2008 All Rights Reserved Alcatel-Lucent 2008

3 Current Situation Multiple Core Networks Services Services GGSN HLR HA HLR SGSN MSC PDSN MSC GSM GPRS UMTS HSPA 1X HRPD -0 EDGE HRPD -A 3 Evolution to a Common Core April 2008 All Rights Reserved Alcatel-Lucent 2008

4 Commonality at the Application Layer, IMS OMA Presence Messaging PoC Location 3GPP IMS COMMON IMS 3GPP2 TISPAN The work of OMA is creating standardized applications above IMS. The work toward a single IMS is progressing rapidly now. 4 Evolution to a Common Core April 2008 All Rights Reserved Alcatel-Lucent 2008

5 Converging on a Common Core Network 3GPP is driving the work on an Evolved Packet System (EPS) Supports, by design, both 3GPP and non-3gpp access networks. Provides a means of attaching multiple access networks, under a common set of design rules, to the common IMS. Provides a means of interworking across those multiple access networks. Provides an Evolved Packet Core (EPC) EPC will enhance: Simplification of network design Common charging and back office systems Use of multiple access technologies Creation of new services for subscribers 5 Evolution to a Common Core April 2008 All Rights Reserved Alcatel-Lucent 2008

6 EPS Architecture HPLMN S6a HSS Gx PDN Gateway hpcrf Rx SGi S6b SWx Operator's IP Services (e.g. IMS, PSS etc ) 3GPP AAA Server S8 S2b S9 vpcrf SWd 3GPP Access VPLMN Serving Gateway Gxc S2a Gxb epdg SWm 3GPP AAA Proxy Non-3GPP Networks Gxa SWn E.G. HRPD, 1X, WiMAX, UMB, WiFi Trusted Non-3GPP IP Access E.G. WiFi Untrusted Non-3GPP IP Access SWa STa 6 Evolution to a Common Core April 2008 All Rights Reserved Alcatel-Lucent 2008

7 Operators Can Pick and Choose Access Networks Operators have been limited in their ability to adopt new access technologies. Usually upgrades were From GSM to GPRS to UMTS, etc. --OR From 1X to HRPD-0 to HRPD-A, etc. Other upgrades often involved a complete change-out of technology (fork lift). EPS allows an operator to attach multiple technologies to the common Evolved Packet Core (EPC). Add technologies don t automatically replace them. Use the technologies that enhance the operator s business plan. Evolve gradually and gracefully. 7 Evolution to a Common Core April 2008 All Rights Reserved Alcatel-Lucent 2008

8 Operators Can Pick and Choose Access Networks Services IMS EPC HSS/AAA PCRF PDN GW GPRS UMTS SGSN HSPA SGW LTE HSGW HRPD epdg WLAN WiMAX 8 Evolution to a Common Core April 2008 All Rights Reserved Alcatel-Lucent 2008

9 Interworking of Access Networks A common core network provides: A common IP environment (addresses, IP anchors). Common policy, charging and billing. Common identity management. Given a common core network, interworking of access networks becomes a matter of the ability of each access network to support single-transmitter terminals that can operate on both access technologies, including : Radio parameters for the target technology, Tunneling of target technology signaling, Movement of bearers to the target technology. 9 Evolution to a Common Core April 2008 All Rights Reserved Alcatel-Lucent 2008

10 Experience in Building LTE-HRPD Interworking The work on LTE-HRPD interworking yields: Inter-access technology radio support structures for other technologies: Radio parameter broadcast and unicast, Standard tunneling mechanisms that could be easily reused or extended, Tune-away strategies. Inter-RAN support for: Tunneling of target technology signaling, Coordination of handoff/handover, Notification of progress and events to optimize resource usage. Core network support for: Inter-technology mobility, Cross-technology policy and charging support, Common identity and subscriber management (e.g., HSS/AAA). 10 Evolution to a Common Core April 2008 All Rights Reserved Alcatel-Lucent 2008

11 Toward the Future What does all of this commonality provide? For the Operator: A single set of standards that supports global roaming, A single set of services to manage and maintain, A single subscription appearance, The ability to take advantage of any and all access technologies that meet their business needs wireless and wireline alike. For the Subscriber: A service set available regardless of the serving access technology, Ease of roaming, Ease of mobility. For the Vendor: A single core network standard to build to, Greater applicability of product portfolios to a wide range of networks. 11 Evolution to a Common Core April 2008 All Rights Reserved Alcatel-Lucent 2008