文章基本信息

标题：Simulation Based Evaluation of Highway Road Scenario between DSRC/802.11p MAC Protocol and STDMA for Vehicle-to-Vehicle Communication
本地全文：下载
作者：Vaishali D. Khairnar ; Srikhant N. Pradhan
期刊名称：Journal of Transportation Technologies
印刷版ISSN：2160-0473
电子版ISSN：2160-0481
出版年度：2013
卷号：3
期号：1
页码：88-104
DOI：10.4236/jtts.2013.31009
出版社：Scientific Research Publishing
摘要：In this paper the DSRC/IEEE 802.11p Medium Access Control (MAC) method of the vehicular communication has been simulated on highway road scenario with periodic broadcast of packets in a vehicle-to-vehicle situation. IEEE 802.11p MAC method is basically based on carrier sense multiple accesses (CSMA) where nodes listen to the wireless channel before sending the packets. If the channel is busy, the vehicle node must defer its access and during high utilization periods this could lead to unbounded delays. This well-known property of CSMA is undesirable for critical communications scenarios. The simulation results reveal that a specific vehicle is forced to drop over 80% of its packets/messages because no channel access was possible before the next message/packet was generated. To overcome this problem, we propose to use self-organizing time division multiple access (STDMA) for real-time data traffic between vehicles. Our initial results indicate that STDMA outperforms CSMA for time-critical traffic safety applications in ad- hoc vehicular networks.
关键词：STDMA; CSMA; MAC; DSRC; IEEE 802.11p; Vehicle-To-Vehicle Etc