车载自组织网络中基于竞争的时分多址MAC协议

doi:10.19678/j.issn.1000-3428.0057280

计算机工程 ›› 2021, Vol. 47 ›› Issue (5): 154-159. doi: 10.19678/j.issn.1000-3428.0057280

车载自组织网络中基于竞争的时分多址MAC协议

张本宏¹, 吴浩浩¹, 俞磊²

1. 合肥工业大学计算机与信息学院, 合肥 230601;
2. 安徽中医药大学医药信息工程学院, 合肥 230012

收稿日期:2020-01-21 修回日期:2020-04-17 发布日期:2020-04-26
作者简介:张本宏(1972-),男,副教授,主研方向为车联网、无线传感器网络、边缘计算;吴浩浩,硕士研究生;俞磊(通信作者),副教授。
基金资助:
国家自然科学基金（61701005）；安徽省科技重大专项（201903a05020049）。

Contention-based Time Division Multiple Access MAC Protocol in Vehicular Ad Hoc Networks

ZHANG Benhong¹, WU Haohao¹, YU Lei²

1. School of Computer Science and Information Engineering, Hefei University of Technology, Hefei 230601, China;
2. School of Medical Information Technology, Anhui University of Chinese Medicine, Hefei 230012, China

Received:2020-01-21 Revised:2020-04-17 Published:2020-04-26

摘要/Abstract

摘要： 车辆的高速移动及网络拓扑变化频繁等特性，使得可靠的介质访问控制（MAC）协议仍难满足车载自组织网络的低延迟和高吞吐量的要求。提出一种基于竞争的时分多址MAC协议，将道路按照通信半径分段，周期性地为每个路段的车辆组织通信，每个通信周期根据功能分为静态段和动态段两部分，静态段使用时分复用的方式进行通信，动态段用于新接入的车辆竞争静态段中的发送时隙。仿真实验结果表明，与DTMAC协议相比，该协议能够提高数据传输的吞吐量，降低车辆之间发生冲突的概率，减少新加入车辆发送数据的等待时延。

关键词: 车载自组织网络, 介质访问控制协议, 分布式调度, 通信竞争, 时隙分配

Abstract: The high speed of vehicle movement and fast change of network topology make it a challenge to design a reliable Medium Access Control(MAC) protocol to meet the low latency and high throughput requirements of Vehicular Ad Hoc Networks(VANETs).This paper proposes a contention-based Time Division Multiple Access(TDMA) MAC protocol.First,the road is segmented according to the communication radius of vehicles,and then the vehicles in each segment are organized to communicate in a periodic manner.Functionally,each communication period is divided into the static segment and dynamic segment.The former is used for communication by time division multiplexing,and the latter is used for competing for time slots of transmission in the static segment to newly added vehicles.Simulation results show that compared with the DTMAC protocol,this protocol can significantly improve the data transmission throughput,decrease the probability of collision between vehicles,and reduce the waiting time of data sent by newly added vehicles.

Key words: Vehicular Ad Hoc Networks(VANETs), Medium Access Control(MAC) protocol, distributed scheduling, communication contention, time slot allocation

中图分类号:

TP393

张本宏, 吴浩浩, 俞磊. 车载自组织网络中基于竞争的时分多址MAC协议[J]. 计算机工程, 2021, 47(5): 154-159.

ZHANG Benhong, WU Haohao, YU Lei. Contention-based Time Division Multiple Access MAC Protocol in Vehicular Ad Hoc Networks[J]. Computer Engineering, 2021, 47(5): 154-159.

http://www.ecice06.com/CN/Y2021/V47/I5/154

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