A novel MAC protocol for VANET based on Improved Generalized Prime Sequence

Protocol sequences are used for multiple access in the collision channel without feedback. In order to increase inter-cluster packet delivery radio in cluster-based VANETs, a MAC protocol based on Improved Generalized Prime Sequence (IGPS) is proposed in this paper. Extra transmitting time slots are inserted in Generalized Prime Sequence (GPS) of cluster heads while the corresponding positions in GPS of cluster members are inserted with extra receiving time slots. Compared to the MAC protocol based on GPS, the proposed MAC protocol guarantees the inter-cluster data transmission when the conflict occurred between inner-cluster and inter-cluster communication. Numerical results illustrate that the performance of IGPS-based scheme is superior to GPS-based one in terms of packet delivery ratio and throughput in the inter-cluster communication.