由无线信道的广播特性造成的路径之间的并行多径干扰问题,已经成为无线多媒体传感器网络中使用多路径路由必须解决的首要问题.针对该问题,提出了一种虚拟网格的干扰避免多路径路由协议(IAMVG).该协议通过把监测区域划分为虚拟网格的方式,预先选择互不干扰的网格,进而优先选择该网格内的簇头节点加入路由的方法,尽量拉开相互干扰链路之间的距离,保证多路径路由处于相互的干扰区域范围外或者尽可能降低干扰.仿真实验表明,IAMVG路由协议极大地减少了并行多径干扰,保证了较高的通信成功率及较低的端到端时延.%Parallel multi-path interference is caused by the broadcast characteristic of wireless channel. It becomes the main problem of using multi-path routing protocol in wireless multimedia sensor network. Against this problem, an interference avoidance multi-path routing protocol base-on virtual grid is proposed. The protocol divides the monitoring region into several virtual grids. Through beforehand geographical separating, the protocol preferentially chooses the cluster node in the virtual grid of mutual non-interference in geography. The distance among routes which interfere by each other is as much as possible. It ensures that there is no interference or little. Simulation results show that IAMVG reduces the parallel multi-path interference and improves the parallel transmission ratio and end-to-end delay.
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