基于集中式时分多址的MAC协议MAC protocol based on centralized time division multiple access
赵颖,李学峰
摘要(Abstract)：
由于节点的高速移动、网络拓扑的动态变化,设计车联网(VANETs)的媒介接入控制(MAC)协议仍存在挑战。为此,提出基于集中式时分多址(TDMA)的MAC协议(C-TDMA-MAC)。C-TDMA-MAC协议选择路边设备(RSUs)作为中心协调者,并由它们向覆盖范围内的车辆分配、协调时隙。C-TDMA-MAC利用时隙复用概念确保两个RSUs覆盖的相邻区域的车辆具有无碰撞的时隙分配。信道时间划分不同帧,每个帧进一步划分为两个时隙集,这些时隙集分配给两个相邻RSUs的移动车辆,降低了RSUs间的干扰。实验数据表明,与VeMAC和Ad Hoc MAC协议相比,提出的C-TDMA-MAC协议能有效地降低传输碰撞和开销。
关键词(KeyWords)： 车联网;媒介接入控制;时分多址;路边设备;时隙分配;传输碰撞
基金项目(Foundation): 国家自然科学基金项目(61472310)~~
作者(Author): 赵颖,李学峰
DOI: 10.16652/j.issn.1004-373x.2018.21.003
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