An optimal cooperative movement prediction approach for emergency message dissemination in multi hop wireless ad hoc vehicular networks

Abstract

The ad-hoc vehicular wireless networks are the class of networks derived from the ad-hoc mobile wireless networks. the vehicular networks are incorporated with the features of both infrastructure and infrastructure-less communication. the success of the ad-hoc vehicular network depends on the cooperative behaviour among the network of nodes. in vehicular networks, the node awareness is only done through the periodic control message dissemination. to improve the packet delivery success rate, the reliable communication between the nodes are very essential. in vehicular network movement characteristics, the network topology changes are frequent over time. in single path message transmission, the right selection of relay vehicle plays an important role in message retransmission. the minimum number of intermediate relay hops to reach the peer destination will minimize the packet transmission delay. the proposed heterogeneous movement prediction (hmp) approach will ensure reliable packet transmission among the vehicles. this method incorporates the techniques fine_factor (ff) which minimizes the utilization of the number of hops and the fine_threshold (ft) which ensures the minimum connectivity with the current vehicles. the enhanced hello packet structure will minimize the one-hop page table update and reduces the network load to a certain extent. to broadcast an emergency message to multiple neighbours from a single relay peer may not be sufficient. the failure or computational delay of rebroadcasting will cause a very serious impact in the vehicular environment. to reduce the single source rebroadcasting failure, the proposed method uses the selective distributed cooperative broadcasting (sdcb) for redundancy free packet forwarding. if the target vehicles are within one-hop coverage, then the source itself will broadcast the message, if not the source vehicle that selects n number of optimal relay peers that has greater potential to rebroadcast newline