基于指针推进策略的分级移动IPv6优化

Performance optimization for hierarchical mobile IPv6 based on pointer forwarding scheme

为降低分级移动IPv6中空闲状态移动节点移动过程中的信令开销,提出了基于指针推进的优化策略。该策略以移动锚点间绑定更新代替部分家乡绑定更新,减小空闲状态移动节点的绑定更新开销。通过对相邻会话间基本策略和优化策略信令开销的分析,推导出优化策略带来的信令开销差值。仿真结果表明:在会话移动比较小(小于1.5)的情况下,指针推进策略可以减小网络信令开销,改善网络整体性能。

To reduce the binding update cost of idle Mobile Node （MN） in Hierarchical Mobile IPv6 （HMIPv6）, an optimization scheme based on pointer forwarding is proposed. This scheme uses the binding update between Mobile Anchor Points （MAP） to replace part of home updates, which reduces the binding update cost of idle MN. The signaling cost difference is derived by analysis of the costs of the basic scheme and the optimization scheme between two successive sessions. Simulation results show that the optimization scheme could reduce the binding update signaling cost and improve the network performance under small Session-to-Mobility Ratio （SMR）, i.e. SMR is less than 1. The sensitivity of the tele-parameters is discussed.