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结合优先级与时隙分配的认知车联网MAC协议

MAC Protocol for Cognitive Vehicle Networking Based on Priority and Time-slot Allocation
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摘要 为了解决基于WAVE的车联网MAC协议存在的用户信息优先级划分不明确及采用固定时隙分配导致安全类信息传递效率低的问题,本文提出一种基于认知无线电技术的车联网MAC协议(CR-WAVE MAC).该协议首先使用增强型分布式信道接入(EDCA)参数调节策略,引入业务类型和用户数作为EDCA参数调节标准,划分用户信息优先级,然后使用认知无线电频谱感知和分配技术根据信息优先级高低进行动态时隙分配,达到增加安全类信息传输效率的目的.仿真实验结果证明:应用本文提出的车联网CR-WAVE MAC协议显著提高了道路安全类信息的传输投递率和吞吐量,降低了传输时延. In order to solve the problems of uncertain user information prioritization and low efficiency of security information transmission caused by fixed slot assignment in WAVE-based M AC protocol for vehicular netw orking,this paper proposes a vehicular netw orking protocol based on cognitive radio technology(CR-WAVE M AC).The protocol uses the enhanced distributed channel access(EDCA)parameter tuning strategy,introduces the service type and the number of users as the EDCA parameter tuning standard,divides the user information priority,and then uses cognitive radio spectrum sensing and allocation technology to dynamically allocate time slots according to the information priority level to achieve the purpose of increasing the efficiency of information transmission of security information.Simulation results show that the proposed CR-WAVE M AC protocol can significantly improve the delivery rate and throughput of road safety information and reduce the transmission delay.
作者 尚佳庆 郑国强 马华红 吴红海 李济顺 SHANG Jia-qing;ZHENG Guo-qiang;MA Hua-hong;WU Hong-hai;LI Ji-shun(School of Information Engineering,Henan University of Science and Technology,Luoyang 471023,China;Henan Key Laboratory for Machinery Design and Transmission System,Henan University of Science and Technology,Luoyang 471003,China;State Key Laboratory of Mining Heavy Equipment,Luoyang 471039,China)
出处 《小型微型计算机系统》 CSCD 北大核心 2019年第7期1474-1478,共5页 Journal of Chinese Computer Systems
基金 国家自然科学基金项目(61772175)资助 河南省自然科学基金项目(162300410098)资助 河南省基础与前沿技术研究计划项目(152300410081)资助 河南省国际合作项目(172102410072)资助.
关键词 车联网 WAVE 认知无线电 优先级 时隙分配 netw ork of vehicles WAVE cognitive radio priority time slot assignment
作者简介 尚佳庆,男,1993年生,硕士研究生,研究方向为车联网MAC协议。E-mail:sjqmz2012@163.com;郑国强,男,1965年生,博士,教授,博士生导师,研究方向为无线通信技术及网络通信协议;马华红,女,1979年生,博士研究生,研究方向为群智感知网络和物联网;吴红海,男,1979年生,博士,副教授,研究方向为物联网和无线传感网;李济顺,男,1963年生,博士,教授,研究方向为精密测量理论.
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