An approach to signaling cost reduction in Proxy MIPv6 for mobility management

Proxy Mobile IPv6 (PMIPv6)is gaining popularity asa Network based mobility management scheme in the recent years. It manages mobility of nodes through Local Mobility Anchor(LMA) that works in co-operation with Mobile Anchor Gateways (MAGs). The original PMIPv6 suggests to collocate MAG with Access Router (AR) in the PMIPv6 architecture. However, this architecture leads to generation of large signaling cost for mobility management. Because, for movement of mobile host (MH) (or mobile node (MN)) even to nearby cells mobility management signals need to traverse to LMA. In this paper, we propose an enhancement to PMIPv6 by re-arranging AR and MAG and allowing single MAG to cover multiple ARs. Further, the protocol tunnels leftover packet of MH directlyfrom old to new MAGA to reduce packet delivery cost. A mathematical analysis is carried out to realize the benefits of the proposed scheme. We analyze signaling cost of the proposed model and compare with PMIPv6 basic version and Dynamic Mobility Anchoring (DMA) scheme. The impact of few input parameters on the signaling cost are investigated. The result reveals that proposed scheme outperforms both PMIPv6 basic and DMA.