An asynchronous multi-channel MAC for improving channel utilization in VANET

IEEE 1609.4 suite in WAVE is responsible for the multi-channel operation in VANET. This layer supports better QoS but requires synchronization. They follow a fixed duration for control and service channels that may result in inefficient utilization of channels. In this paper, an asynchronous multi-channel MAC scheme allowing simultaneous transmission on different service channels is proposed. The proposed scheme allows those nodes to dynamically access control channel and also allows them to listen and utilize the control channel while not associated with the service channel. The scheme is compared with IEEE 1609.4 in terms of throughput and channel utilization.