一种适用于WiFi Mesh网络的AODV改进路由协议

提出了一种利用wireless fidelity (WiFi) Mesh网络中多传输范围、多速率特性的路由算法. 这种算法引进了跨层设计思想，利用IEEE 802.11的自适应速率切换机制，节点建立路由时以物理层的数据传输速率作为判据，速率相同时则选择跳数少的路径. 提出了通过调整发射功率实现在不同速率下选择路径的方法. 利用这种算法改进了Ad hoc按需距离矢量（AODV）路由协议，提出WiFi－AODV路由算法. 仿真分析表明，该路由算法能建立一条数据速率高、传输时延小、系统吞吐量大的路由.

An Improved AODV Algorithm for WiFi Mesh Networks

A routing algorithm utilizing the multi-rate and multi-range characteristic in wireless fidelity(WiFi) mesh networks is proposed.A cross-layer design scheme is newly introduced.The mechanism of adaptive data-rate transition in physical layer is considered in this algorithm.The maximum data-rate is used as the performance metric when establishing the route,and the minimum hop-count is regarded as a criterion under the same data-rate.The method to discover the path under different data-rate is presented.It will adjust the transmitted power level and expand the transmission range step by step when failed to establish the route within the given area.When the proposed algorithm is adopted,the Ad hoc on-demand distance vector(AODV) routing can be improved as WiFi-AODV.Simulation results show that WiFi-AODV is capable of establishing a route which has high data-rate,short link-delay and greate network throughput.