移动支持协议可伸缩性研究

Research on scalability of mobility support protocols

为对移动支持协议的可伸缩性进行研究,提出一个合适的网络模型,在此网络模型的基础上采用理论分析的方法分析使用各移动支持协议时关键节点的处理负担,并通过数值仿真的方法对只使用移动IP协议和引入层次移动时HA的处理负担以及采用M IP-RR、C IP和HAWAII等不同的微移动协议时GW的处理负担进行比较.结果表明,引入层次移动与只使用移动IP相比减少了HA的处理负担,增加了协议的可伸缩性;在不同的微移动协议中,使用显式删除旧路径的路径维护策略与频繁发送周期性的刷新报文相比具有较大的可伸缩性;使用路径更新报文发送到交叉MRA的路径更新方法与路径更新报文发送到GW相比具有较大的可伸缩性.

The scalability problem of mobility support protocols was studied. Firstly a suitable network model was proposed and the processing load of the key network nodes using various mobility support protocols was analyzed theoretically. In this base the numerical simulation method was applied to compare the processing load of HA when only using mobile IP with introducing hierarchical mobility and the processing load of GW when applying different micro-mobility protocols such as MIP - RR, CIP and HAWAII. The results show that introducing hierarchical mobility lightens the processing load of HA and increases the protocol scalability comparing with only using mobile IP. In different micro-mobility protocols, the route maintenance strategy of deleting old routes explicitly has more scalability than frequent sending refresh messages periodically and the route update method of sending route update messages to crossover MRA has more scalability than sending messages to GW.