一种基于标识分离映射网络的子网移动性管理方案

标识分离映射网络成功实现了身份与位置分离，解决了单点移动性问题，但是没有考虑子网移动性管理的问题。在此基础上提出一种基于分级多层映射机制的子网移动性支持方案，通过子网多身份标识到唯一路由标识的多对一映射机制，在实现子网整体移动性支持的同时，又降低了网络整体信令开销和切换时延开销，优化了网络性能。仿真结果说明，在子网移动过程中，与普通节点单独注册相比，采用基于分级多层映射机制的块注册方式，可以有效降低网络整体信令开销和切换时延开销，尤其是核心网的信令开销，从而避免核心网资源的浪费，提高网络的整体性能。

A network mobility management scheme based on the locator/ID separating network

The Locator/ID Separating Network successfully separated the identifier and locator of IP, which supports the single host mobility, but had no consideration on the network mobility management. In order to solve this problem, this paper proposes a graded multi-layer mapping mechanism, by enabling a subnet to enjoy the same Routing Identifier, which not only supports the network mobility, but also decreases the network signaling overhead and handoff delay. The theoretical and numerical analyses show that, compared to the single registration mode, the block registration mode based on the graded multi-layer mapping mechanism can significantly decrease the overall network signaling overhead and handoff delay, especially that in the core network. It improves the network performance and simultaneously saves the resources of the core network.