Ad Hoc Networks Received Power Assisted Aodv Protocol

Ad Hoc network routing protocol has been an international popular issue in the research and application field for many years. The paper focuses on the investigation of the AODV routing protocols. Research shows that routing failures occurs easily in the Ad Hoc network because of frequent topology structure changes, as AODV lack of an effective mechanism to estimate link stability. In the routing maintenance phase, it doesn't take measures to maintain the link status until actual routing failure happens, which result in the high cost of the routing control and the low network performance. For the above-mentioned problems, the paper proposes an advanced routing protocol based on Received signal Power aided AODV (RP-AODV).To begin with, because signal fading has a certain relationship with the transmission distance in the wireless channel, RP-AODV use the received signal power by the nodes as the evaluation of link stability. While the prediction of the nodes' movement is being made by the signal power received over 3 times in order to get the failure time of the link. In order to reduce the times of failures, the stable links are elected during the route discovery phase. Furthermore, the prediction time is used to reestablish the routing before the link fails to reduce the packet losses in the routing maintenance phase. Finally, during the reestablish phase, the local area links (except those are failing) are used to reestablish the link in the nodes within twice the radius of transmission, which reduce the cost of the reestablishment.This paper presents the RP-AODV protocol on the JiST/SWANS network simulation software. Compared with the AODV protocol, the result of the simulation indicates that RP-AODV protocol can reduce the routing failure times, end-to-end delay, routing overhead, and enhance packet delivery rate.