基于移动节点的无线网状网MX-MAC协议

摘要

无线Mesh网络中移动节点的数据包冲突问题,严重降低了网络的吞吐率和能量利用率.针对该问题,对现有X-MAC协议进行优化,提出移动MX-MAC协议.在移动节点和非移动节点通信的情况下,增加退避机制,每个节点在发送数据之前进行退避.仿真结果表明,MX-MAC协议能够增加无线Mesh网络的生存周期,降低无线Mesh节点的碰撞和串听几率.%The problem of collisions in mobile nodes of wireless Mesh networks seriously reduces the network throughput and the energy efficiency.To solve this problem, MX-MAC protocol developed based on X-MAC was proposed.Under certain conditions of communication between mobile nodes and fixed node, a retreat mechanism was added into MX-MAC protocol and each node was retreated before sending data.Results of simulation show that MX-MAC protocol is effective on increasing the lifetime of wireless Mesh networks and on reducing the probability of collision and overhearing wireless Mesh nodes.