摘要
车载自组织网络(Vehicular Ad Hoc Network,VANET)的关键技术之一就是设计一个高效的媒体接入控制(Medium Access Control,MAC)协议。MAC协议因对网络的吞吐量、时延和丢包率等具有重大影响而成为研究热点。针对车载自组织网络对MAC协议的特殊性要求,提出了一种基于协作方案的TDMA MAC协议,即C-TDMA MAC。该协议中,当源节点到目的节点间直接传输失败时,其邻近辅助节点利用未被预留的时隙协作重传其先前侦听到的数据包到目的节点,而不影响其它数据包的正常传输。数值分析和仿真结果表明,所提出的协议提高了数据包成功传输的概率。
The design of the medium access control （MAC） protocol is one of the key technologies of the vehicular ad hoe Networks（VANET）, which directly impacts the network performance such as the access fairness, throughput delay and the packet-lost-radio etc. We presented a cooperative scheme for TDMA MAC due to the requirements of the MAC agreement in VANET,called C-TDMA MAC. In cooperative TDMA MAC, neighboring nodes use the unreserved time slots to cooperatively relay a packet not reaching its target receiver,without affecting the normal transmission of other data packets. Numerical analysis and simulation results show that the proposed protocol improves the successful proba-bility of packet transmission.
出处
《计算机科学》
CSCD
北大核心
2015年第11期174-177,共4页
Computer Science
基金
国家自然科学基金项目(61371113
61401241)
交通运输部应用基础研究资助项目(2013-319-825-110)资助
关键词
车载自组织网络
媒体接入控制
协作通信
时分多址
VANET, Medium access control（MAC）, Cooperative communication, Time division multiple access（TDMA）
