IEEE 802.11p/1609.4多信道协作机制改进研究

doi:10.19678/j.issn.1000-3428.0050968

计算机工程 ›› 2019, Vol. 45 ›› Issue (7): 108-113,120. doi: 10.19678/j.issn.1000-3428.0050968

IEEE 802.11p/1609.4多信道协作机制改进研究

林峰^1,2, 周显东^1,2

1. 新一代信息网络与终端协同创新中心, 重庆 400065;
2. 重庆邮电大学电子信息与网络工程研究院, 重庆 400065

收稿日期:2018-03-27 修回日期:2018-05-21 出版日期:2019-07-15 发布日期:2019-07-23
作者简介:林峰(1978-),男,高级工程师,主研方向为车联网、5G通信技术、物联网;周显东,硕士研究生。
基金资助:
国家科技重大专项（2016ZX03002019-007）；国家自然科学基金青年基金（61601073）；重庆市教委科学技术研究项目（KJ1500427，KJ1600417）。

Research on Improvement of IEEE 802.11p/1609.4 Multi-Channel Collaboration Mechanism

LIN Feng^1,2, ZHOU Xiandong^1,2

1. Collaborative Innovation Center for Information Communication Technology, Chongqing 400065, China;
2. Electronic Information and Networking Engineering Research Institute, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Received:2018-03-27 Revised:2018-05-21 Online:2019-07-15 Published:2019-07-23

摘要/Abstract

摘要： IEEE 802.11p/1609.4是车联网的专用接入访问控制协议。针对IEEE 802.11p/1609.4标准协议中多信道协作机制存在信道资源浪费、竞争信道拥塞等问题，在划分车载单元与路侧单元优先级的基础上，提出一种改进的多信道协作机制。将控制信道划分为注册时隙（RI）和轮询时隙（PI），RI节点利用服务信道提高空闲信道资源利用率，PI通过轮询列表在控制信道发布安全消息消除信道竞争。在Matlab和OMNET++的仿真环境下进行验证，结果表明改进机制在安全消息传输率、平均传输时延、服务信道吞吐量和消息丢失风险指数方面均有明显的性能提升，并且在高节点密度情况下，仍能保证消息传输效率。

关键词: IEEE 802.11p/1609.4协议, 车联网, 多信道协作, 路侧单元, 信道接入机制

Abstract: IEEE 802.11p/1609.4 is exclusively designed as the Media Access Control(MAC) protocol for vehicular networking.To address the problems of channel resource wasting and congestion of competitive channels led by multi-channel collaboration mechanism in the IEEE 802.11p/1609.4 standard protocol,this paper proposes an improved multi-channel collaboration mechanism based on dividing the priorities of Onboard Unit(OBU) and Road Side Unit(RSU).The control channel is divided into Registration Interval(RI) and Polling Interval(PI).The RI node uses Service Chanel(SCH) to improve the resource utilization of the idle channel,and the PI issues a security message on the Control Channel(CCH) through the polling list to eliminate the CCH competition.The verification results in the simulation environment of Matlab and OMNET++ show that the improved mechanism has obvious better performance in the safe message transmission rate,average transmission delay,service channel throughput and message loss risk index,and in the case of high node density,it can still guarantee the efficiency of message transmission.

Key words: IEEE 802.11p/1609.4 protocol, vehicular networking, multi-channel collaboration, Road Side Unit(RSU), channel access mechanism

中图分类号:

TP393

林峰, 周显东. IEEE 802.11p/1609.4多信道协作机制改进研究[J]. 计算机工程, 2019, 45(7): 108-113,120.

LIN Feng, ZHOU Xiandong. Research on Improvement of IEEE 802.11p/1609.4 Multi-Channel Collaboration Mechanism[J]. Computer Engineering, 2019, 45(7): 108-113,120.

http://www.ecice06.com/CN/Y2019/V45/I7/108

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