On Mobility-Aware Dual Pointer Forwarding Handoff Scheme in Cost-Optimized Proxy Mobile IPv6 Networks

摘要

In this paper, a mobility-aware Dual Pointer Forwarding scheme (mPF) is applied in Proxy Mobile IPv6 (PMIPv6) networks. When the MN moves, this scheme can reduce the high signalling overhead for intra-handoff/inter-handoff, because the Local Mobility Anchor (LMA) and Mobile Access Gateway (MAG) are connected by pointer chains. In other words, a handoff is aware of low mobility between the previously attached MAG (pMAG) and newly attached MAG (nMAG), and another handoff between the previously attached LMA (pLMA) and newly attached LMA (nLMA) is aware of high mobility. Based on these mobility-aware binding updates, the overhead of the packet delivery can be reduced. Also, the binding update cost and packet delivery cost for route optimization are analysed, based on the mathematical analytic model. Analytical results show that our mPF outperforms the PMIPv6 and the other pointer forwarding schemes, in terms of reducing the total cost of signalling.