Analysis and comparison of MAC protocols in vehicular Ad-hoc networks

Quality of service(QoS) demanded by various applications in Intelligent Transport System(ITS) strongly challenges the Medium Access Control(MAC) protocol in Vehicular Ad-hoc Networks(VANET).A classification of MAC protocols in VANET was proposed firstly.The comprehensive analysis and comparison were made to reveal the disadvantages of MAC protocols in the aspects of information used and combination utilization of elementary MAC methods. Finally the authors indicated making full use of availble infomation and improving the distribututed time-scheduling algorithm were the keys of future VANET MAC protocols design.