中文摘要：

PMIPv6是基于网络的移动性管删协议，作为其核心实体，本地移动锚点（Local Mobility Anchor，LMA）功能的可靠性直接关系到整个网络的稳定运行。文中提出了一种保证LMA可靠性的机制，该机制定义一个由备用LMA组成的冗余集，通过对当前活跃LMA和冗余集中备用LMA之间的切换管理，实现在LMA失效情况下移动性管理功能的延续性和服务状态的一致性，从而保证整个PMIPv6网络的稳定运行。通过对机制开销的理论分析，表明所提机制最适合LMA失效概率小，PMIPv6域小的应用场景。

英文摘要：

PMIPv6 is a network-based mobility protocol and the reliability of its core entity. Local Mobility Anchor （LMA）, directly affects the stability of the whole network. It proposes a LMA reliability scheme, which defines a redundancy consisting of some standby LMAs. By the means of the switching management between the active LMA and a standby LMA, the scheme reaches the aim that the LMA can always remain function and the service can keep consistent in case that the active LMA fails. Then,conduct an analysis of the performance for the scheme. The result of the analysis shows the protocol is perfect for the scene that LMA＇ s failure probability is low and the domain of PMIPv6 is small.