Abstract: Deploying SIP based application in wireless mesh networks can provide ubiquitous multimedia emergency communication in infrastuctureless areas, but unreliable wireless links may decrease communication reliability. This paper investigated the route selection method for message forwarding in wireless mesh networks. A new reliability model was proposed to measure the one-to-anyone-from-many communication for real-time calling setup with limited number of attempts. A route selection method was proposed for optimizing calling success ratio and calling setup speed,followed by theoretical analysis and comparison on upper and lower bound for communication reliability. Finally, a series of simulation experiments were designed and conducted to verify the effectiveness and superiority of the method.

Key words: Route selection, SIP calling, Wireless mesh networks, Reliability