一种基于位置标识与身份标识分离协议的移动性快速切换方法

A Method of Mobility Fast Handover Based on Locator/ID Separation Protocol

现有的位置标识与身份标识分离协议(Locator/ID Separation Protocol,LISP)需要在其基础上部署移动IP(Mobile IP,MIP)才能实现移动性.针对此方案切换延时长、丢包率高、部署相对复杂等缺点,提出了一种基于LISP协议的快速切换方法(FM-LISP).改进方法吸取了MIP快速切换FMIPv6中链路层触发的机制,并结合LISP协议本身特性,省去了FMIPv6中转交地址分配、冲突地址检测及双向隧道的建立,简化了切换过程.仿真结果表明,FM-LISP在切换延时方面较LISP+MIP方案有较大程度的改进,并利用原接入路由器的缓存功能,有效地降低了丢包现象的发生.

Locator/ID separation protocol （LISP） implements endpoint mobility by deploying mobile IP （MIP） on its basic framework. Considering the disadvantages of long handover latency, high rate of packet loss and complexity in deploying, an FM-LISP was introduced to achieve mobility fast handover. Similar to FMIPv6, FM-LISP uses link layer mechanism to trigger handover. Considering the LISP infrastructure, the new method omits some unnecessary procedures in FMIPv6 such as new CoA allocation, duplicate address detection, and establishment of hi-directional tunnels. The simulation result shows that FM-LISP has notable improvement in handover latency compared with LISP＋MIP approach. Moreover, the data cache mechanism can effectively reduce the packet los