Fuzzy Logic based Cooperative Rebroadcasting (CoRe) Algorithm for Multi-hop Vehicular Network

In multi-hop Vehicle-to-Vehicle (V2V) communication, the transmission of redundant rebroadcasted messages affects the reachability of other safety messages to the receivers within the stipulated time. Several algorithms have been proposed to curtail the redundancy rate, which may be either transmitter-initiated or receiver-initiated. Most of the algorithms persuaded additional overheads to gather network status information required to make the decision. To cope with this, a novel Cooperative Rebroadcasting (CoRe) algorithm is proposed to solve the broadcast storm problem in multi-hop vehicle communication. The proposed CoRe algorithm is twofold: firstly, the receiver controls the rebroadcasting of received messages using fuzzy logic based decision-making system, which is based on locally collected real-time information such as velocity factor, contention intensity, and collision rate. Secondly, the transmitter adjusts the frequency of broadcasting the periodic safety messages to balance the traffic flow and control the message collisions. The performance of the proposed CoRe algorithm is analyzed using the NS3 network simulator, and the results are compared with other related algorithms in terms of message reception ratio, rebroadcast rate, and overheads. The simulated results are witnessed that the proposed CoRe algorithm showed better performance against flooding and other similar algorithms.