Abstract:

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.

Key words: WMSN;virtual grid;interference avoidance;multipath routing