期刊名称：International Journal of Future Generation Communication and Networking
印刷版ISSN：2233-7857
出版年度：2014
卷号：7
期号：4
页码：171-182
DOI：10.14257/ijfgcn.2014.7.4.16
出版社：SERSC
摘要：In IEEE 802.11p protocol of Vehicular Ad-Hoc network (VANET), the multiple channels are divided into one control channel (CCH) and six service channels (SCHs). CCH is used for broadcasting safety messages related to road conditions, so that CCH access algorithm has great influence on efficiency of VANET. This paper proposes a contention-free bandwidth partition algorithm, which can dynamically partition the CCH interval and bandwidth assigned to on board units (OBUs) located in vehicles according to real-time VANET environments. Meanwhile, a frequency hopping communication scheme based on chaos scrambling is applied to our algorithm to improve the reliability of VANET. The performance of proposed algorithm are verified by theoretical analysis, the results show that it is able to enhance the transmission efficiency of safety packets in CCH with high reliability.
关键词：VANET; IEEE 802.11p protocol; control channel; channel access algorithm; ; bandwidth partition; chaos sequence; reliable communication
