CM-MAC:一种基于分簇的多信道车载网MAC协议

发布时间：2018-07-13 07:54

【摘要】：车载网VANET是一种应用于智能交通系统的新型无线移动自组织网络(mobile ad hoc network,MANET).随着车辆以及移动ad hoc网络技术的发展,车载网已经成为一个新兴的研究领域.针对VANET中车辆行驶的特征,提出一种拓扑相对稳定的车辆分簇算法.在此算法基础上,根据专用短程通信(dedicated short range communication,DSRC)标准中控制信道(control channel,CCH)和服务信道(service channel,SCH)的分配,考虑车辆间的无线通信干扰和不同应用的QoS需求,提出一种基于分簇的多信道混合型MAC协议,簇内通信采用非竞争的TDMA机制,簇间通信采用基于竞争的CSMA?CA机制,相邻簇采用不同的服务信道.模拟实验表明,提出的MAC协议在同时满足实时应用的延迟需求和非实时应用的吞吐量方面,优于现有协议.
[Abstract]:VANET is a new wireless mobile ad hoc network (mobile ad hoc / Manet) used in intelligent transportation system (its). With the development of vehicle and mobile ad hoc network technology, vehicle network has become a new research field. According to the characteristics of vehicle driving in VANET, a vehicle clustering algorithm with relatively stable topology is proposed. On the basis of this algorithm, according to the allocation of control channel (CCH) and service channel (service channel SCH) in the special short-range communication (dedicated short range communication DSRC standard, the wireless communication interference between vehicles and the requirements of different applications are considered. A multi-channel hybrid MAC protocol based on clustering is proposed, in which non-competitive TDMA mechanism is used in intra-cluster communication, CSMA-CA mechanism based on competition is used in inter-cluster communication, and different service channels are used in adjacent clusters. Simulation results show that the proposed MAC protocol is superior to the existing protocols in satisfying both the delay requirements of real-time applications and the throughput of non-real-time applications.
【作者单位】：中国科学院计算机网络信息中心;中国科学院信息工程研究所;
【基金】：国家自然科学基金项目(60933011) 国家“九七三”重点基础研究发展计划基金项目(2011CB302902) 国家科技重大专项基金项目(2010ZX03006-002-03) 中国科学院战略性先导科技专项课题(XDA06040100)
【分类号】：TN929.5

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