Abstract: For the routing void problem existing in wireless multimedia sensor networks when performing geographic forwarding,this paper presented a new geographic routing algorithm RTGR．This algorithm determines the holes position by periodically identifying which node is located on the border,and then boundary nodes construct a circular domain which covers the hole． After arriving at the domain,packets will select a convex hull node dynamically as intermediate node to bypass the routing holes in the shortest path．Simulation results show that average number of hops is significantly reduced and it’s possible to guarantee the real-time transmission of multimedia data in a multi-routing void environment.

Key words: Routing void problem,Geographic routing,Wireless multimedia sensor networks,Convex hull