Abstract:
Internet adoption has surpassed all other technologies before it including telephone, radio, television and personal computers. Coinciding with the rapid adoption of the Internet would have to be the wireless revolution. The landscape of today's telecommunications portrays an amazing patchwork of heterogeneous networks, each with their own specific advantages. It is only by combining these networks together using IP to form an integrated heterogeneous access network will it be possible to provide users with convenient global access and personalised wireless multimedia communication services that is the goal of Beyond 3G/4G networks.
Even though mobility management is well supported in cellular systems the next generation mobile network will be based on heterogeneous networks with characteristics different from cellular networks carrying mainly voice and hence the need for IP mobility management.
IPv6 will have replaced IPv4 due to the lack of addresses as many personal devices will be concurrently accessing the Internet in the B3G era. Mobile IPv6 (MIPv6) is IETF's network layer protocol for node mobility in IPv6 networks. Mobile IPv6 achieves the goal of mobility by making transparent to the application layer, changes in the IP address as a mobile node ventures from one subnet to another.
MIPv6 was not designed to provide fast handovers to real-time applications such as Voice over IP. Many solutions exist in the literature to improve MIPv6. Edge Handover (EH) differs from these solutions by concentrating on reducing only one component of the handover delay, the registration delay. It leaves the way open to customize its behavior in the form of heuristics that determine when to send a global binding update to the home agent. This becomes the basis for a mobility management framework using EH and other best of breed solutions. In this presentation the deficiency in standard MIPv6 handovers is explained. EH is introduced and we propose two new heuristics, one to reduce global signaling in EH and the other is to reduce the end-to-end delay without detrimental effect to handover latency experienced by VOIP applications.
About the speaker:
Johnny Lai graduated from RMIT University in 1999 with a BEng(Hons) majoring in Communications. Previously he worked as a software developer at Unico and Xacom. He completed a MEngSc(Research) in Jan 2004 at Monash University, under the supervision of Dr. Ahmet Sekercioglu and Prof. Gregory Egan. He started his current PhD candidature in May 2005 with the same supervisors continuing research in mobility management for IPv6 networks.
