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ITG Fachgruppe 5.2.4 IP and Mobility Localized Mobility Management & Fast Mobile IP Handoffs in heterogeneous networks NEC Mobile Internet Group: H. Hartenstein, B. Lamparter, M. Liebsch, K. Paul, X. Pérez, A. Sarma, R. Schmitz, D. Westhoff mobicom @ CCRLE.NEC.DE NEC Network Laboratories, Heidelberg June 2001 © NEC Europe Ltd., NDL-E Heidelberg, 2001 Mobile IP Background & Overview Background • Wireless access to the Internet is becoming commonplace • User‘s interest is in a seamless connection for voice and data (Internet) via heterogeneous access technologies • Current GSM/GPRS solutions do not support heterogeneous wireleless/wireline access Overview • Mobile IP represents a basic link-layer independent approach towards ‚mobile Internet‘, based on the IP protocol • Desirable goal of Mobile IP is to provide uninterrupted services for roaming users in heterogeneous access networks © NEC Europe Ltd., NDL-E Heidelberg, 2001 Network Architecture - IST Project Moby Dick Mobility Server AAALocal Policy Server W-CDMA Intra-domain hand-off Home Agent AAAHome QoS Server W-CDMA Domain B W-CDMA Inter-technology hand-off 802.11 Backbone Domain C Inter-domain hand-off Domain A 802.11 Ethernet Domain D © NEC Europe Ltd., NDL-E Heidelberg, 2001 Open Issues for recent Mobile IPv6 scenario • Uninterrupted services for moving mobile devices, i.e., micro-mobility extensions to Mobile IP Fast Handoff • Support a variety of access technologies • QoS • Paging • Security (AAA) and Privacy • (Header Compression) © NEC Europe Ltd., NDL-E Heidelberg, 2001 NEC – MIP Handoff Activities • Results – Prototype of a Mobile IPv4 fast handoff mechanism via ‘Simultaneous Bindings’, including recent analysis for real-time UDP-traffic and TCP performance in case of a handoff • Ongoing work – Analysis of Micro-Mobility extensions for Mobile IPv6 (recent IETF Internet Drafts), to provide localized, fast handoff schemes for intraadministrative-domain handoffs – Analysis of hierarchical vs. non-hierarchical approaches, e.g., by means of ns-simulations • Future activities – Evaluation and implementation of the appropriate handoff mechanism for recent environments and scenarios (e.g., IST project ‘Moby Dick’) © NEC Europe Ltd., NDL-E Heidelberg, 2001 Hierarchical Approaches / LMM e.g., Regional Registration HA CN INET Reg. COA GMA GMA Administrative Local COA © NEC Europe Ltd., NDL-E Heidelberg, 2001 Administrative domain Router domain Reg. COA HA CN GMA MAR Reg. COA Home Agent Correspondent Node Gateway Mobility Agent Mobile Aware Router Regional Care-of address Non-hierarchical Approaches ‘Fast Handoffs in MIPv6’-Draft HA CN INET In case of a handoff, Router Bicasting Handoff © NEC Europe Ltd., NDL-E Heidelberg, 2001 packets destined for the Mobile Node are bicasted (duplicated) during the handoff phase; i.e., when the MN handoffs, packets already arrive at the new point of attachment. Comparison & Evaluation The approaches are to be analysed via ns-simulations, considering parameters, like: • Handoff latency • End-to-end delay • Signalling load • Scalability • Route optimisation • Link delay / wireless delay • etc. © NEC Europe Ltd., NDL-E Heidelberg, 2001 Thank you! Questions? © NEC Europe Ltd., NDL-E Heidelberg, 2001