An extension to Proxy Mobile IPv6 for the Anchor node selection in the domain

In Proxy Mobile IPv6 (PMIPv6) [1] networks, the Local Mobile Anchor (LMA) handles both management control and tunneling traffic for Mobile Nodes (MN) or Mobile Host (MH), which is a single point of bottleneck. Multiple LMAs are usually arranged in a management domain by operators to increase load capacity. However, the network-side load information is not carefully considered in most existing schemes, which might result in load unbalance among LMAs. To solve this problem, a distributed policy decision-making architecture including a LMA-assist selection scheme is proposed as an extension to PMIPv6. The basic idea behind the extension is that each LMA maintains the load information of other LMAs' in the domain and makes decision to help selection procedure in a distributed manner. The architecture organizes LMAs which forms a distributed functional layer to achieve adaptation and load balance. The simulation results demonstrate that the proposed architecture can increase the rate of successful registrations as well as reduce signaling overheads.