一种用于MIPv6平滑切换的移动缓存和评价方法

已经提出的移动IPv6平滑切换框架中，普遍使用接入路由器进行移动信令的处理、数据的缓存和转发操作，这种结构很难在实际的网络环境中部署和使用。本文提出了一种用于移动IPv6平滑切换的移动缓存；分析了缓存转发过程的时序特征；提出了使用包丢失率和包乱序率对缓存转发过程进行性能评价的一般方法，并给出了计算公式和取值方法；通过模拟实验，对评价方法进行了分析和验证。通过对移动缓存和评价方法的使用，能够有效优化平滑切换结构，并提高缓存转发性能。

A Mobile Cache and the Evaluation Method for MIPv6 Smooth Handovers

A well-known structure has been used for Mobile IPv6 smooth Handovers in most released frameworks. As the management of mobility signals, the caching and forwarding of pre-path packets are all operated by access routers, the structure is hard to deploy and implement in real networks. In this paper, a mobile cache was proposed for Mobile IPv6 smooth handovers. The time sequence of buffer-forwarding process was analyzed. An evaluation method was formulized with the packet loss rate and the packet out-of-order rate. In simulation, the evaluation method was analyzed and validated. The mobile cache can optimize the structure of smooth handovers, and the evaluation method can enhance the performance of buffer-forwarding processes.