A Novel Mechanism to Improve Handover Efficiency Considering the Duplicate Address Occurs in HMIPv6

Numerous researches about Mobile IPv6 (MIPv6) have been proposed recently and the handover delay of the Mobile Nodes (MNs) among different networks is surely a worthy noticing issue. There are three major reasons for the MIPv6 handover delay: Movement Detection, Duplicate Address Detection (DAD), and Binding Update (BU), in, which DAD occupies most of the MIPv6 handover delay and influences real-time services greatly. No previous paper mentions how to reconfigure another unique Care of Address (CoA) when the generated CoA is used by other nodes during the DAD, and how to generate a unique CoA to accelerate the handover, reduce the handover delay and avoid the packet loss during the handover. To avert the problems that worsen the handover latency and the packet loss, this paper presents a Fast-Reconfigure Address Mechanism (F-RAM) to generate a unique CoA rapidly when duplicate address occurs, to evade the occurrence of the second duplication, and to reconfigure a unique address quickly. Our experiment results prove that our proposed scheme indeed reduces the handover delay and the packet loss when the CoA is duplicated.