对Ad hoc接入网网关选择算法的研究改进

Study and improvement of gateway selection algorithm for Ad hoc network access to Internet

目前一些Ad hoc接入网的网关选择算法存在着网关频繁切换、网关负载不平衡等一些问题,这直接导致了网络传输延时和丢包率的增大。针对这些情况,首先对目前常用的Jelger算法进行了研究并做出改进,引入了网关选择参数的概念,从跳数和网关负载两个方面综合考虑来进行网关选择,用于解决该算法产生的网关频繁切换和网关负载较大的问题。最后,使用OPNET仿真软件对新旧两个算法分别进行仿真,并对结果进行了比较和分析。

At present,a number of gateway selection algorithm in the ad hoc access network has a few of problems,such as gateway frequent switching,gateway load imbalance problems and so on,which led directly to the network transmission delay and packet loss rate increases. In response to these situation,study the Jelger algorithm firstly,and then improve the algorithm,introduced the concept of gateway＇s selection parameter to solve the problem that gateways frequently switched and gateway＇s load is too large. Finally,this article simulates two algorithms by OPNET simulation software,and the results were compared and analyzed.