车载自组网基于集群协作的MAC协议  

An Cooperative Cluster-based MAC Protocol for VANETs

作　　者：唐晋生[1] 朱西平[1] 金虎[1] TANG Jin-sheng ZHU Xi-ping JIN Hu(College of Information Security Engineering, Chengdu University of Information Technology, Chengdu 610225, China)

机构地区：[1]成都信息工程大学信息安全工程学院,四川成都610225

出　　处：《成都信息工程大学学报》2016年第5期483-488,共6页Journal of Chengdu University of Information Technology

基　　金：四川省科技支撑计划资助项目(2013GZX0169)

摘　　要：车载自组网基于竞争的MAC协议IEEE 802.11P存在预见性、公平性、低吞吐量、延迟性、高碰撞率等问题。提出基于集群协作的MAC协议CCBM(an cooperative cluster-based MAC protocol for VANETs),解决节点接入信道的公平性问题,同时提高信道的利用率和有效地适应网络拓扑变化。理论计算和仿真结果显示,选择集群头节点HN(head node)的平均时隙小于IEEE 802.11P 50%,稳定性增加50%。For vehicular ad-hoc network （ VANET）, contention-based medium-access-control （ MAC ） protocols such as IEEE 802.1 l p have problems in predictability, fairness, low throughput, latency, and high collision rate. Therefore, this paper proposes a new protocol ,i. e. An Cooperative Cluster-based MAC Protocol for VANETs（CCBM）. Therefore, CCBM solves the fairness problem of node access channel. In addition, the group＇ s algorithm can also improve the utili- zation of idle time, and it can effectively adapt to network topology changes. Theoretical calculation and simulation re- sults show that the average time slot of the head node （HN） is less than IEEE 802.11P 50 % and the stability is in- creased by 50 %.

关 键 词：车载自组网 网络拓扑 头节点 IEEE 802.11p 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]