电子学报 ›› 2017, Vol. 45 ›› Issue (6): 1408-1414.DOI: 10.3969/j.issn.0372-2112.2017.06.019

所属专题: 车载自组织网络

• 学术论文 • 上一篇    下一篇

VANET中基于协议序列及TDMA的混合信道接入机制

徐哲鑫, 蔡苓玲, 郑丽丽, 吴怡   

  1. 福建师范大学医学光电科学与技术教育部重点实验室, 福建福州 350007
  • 收稿日期:2015-12-15 修回日期:2016-11-03 出版日期:2017-06-25 发布日期:2017-06-25
  • 通讯作者: 吴怡
  • 作者简介:徐哲鑫 男,1985年生于福建福州,博士,福建师范大学讲师,主要研究方向为无线自组织网.E-mail:xuzhexin@fjnu.edu.cn;蔡苓玲 女,1992年生于福建泉州,福建师范大学硕士生,主要研究方向为无线自组织网、传输序列等.E-mail:fsd_c@sina.cn;郑丽丽 女,1990年生于福建省福鼎市,福建师范大学硕士,主要从事车载自组织网络通信方面的研究.E-mail:zhenglili1001@qq.com
  • 基金资助:

    国家自然科学基金(No.61571128);教育部高等学校博士学科点专项科研基金(新教师类)资助项目(No.20133503120003);福建省教育厅科技项目(B类)(No.JB13005);福建省科技厅工业科技计划重点项目(No.2014H0019)

A Hybrid Channel Access Mechanism Based on Protocol Sequences and TDMA for VANET

XU Zhe-xin, CAI Ling-ling, ZHENG Li-li, WU Yi   

  1. Key Laboratory of Opto Electronic Science and Technology for Medicine of Ministry of Education, Fujian Normal University, Fuzhou, Fujian 350007, China
  • Received:2015-12-15 Revised:2016-11-03 Online:2017-06-25 Published:2017-06-25

摘要:

为了提高高速公路场景下用户平均有效数据吞吐量,提出车载自组织网络分布式信道接入机制.通过道路区段划分实现协议序列集复用;通过引入少量反馈并利用UI(User Irrepressibility)序列特性实现节点间接入顺序感知;同区段节点间利用分布式TDMA(Time Division Multiple Access)模式最大化吞吐量.仿真结果表明,其吞吐量性能优于经典的基于GNSS(Global Navigation Satellite Systems)的机制,并且物理层数据传输速率越大,节点通信半径越大,车辆密度越稀疏,其优势越明显.

关键词: 混合信道接入机制, 协议序列, 时分多址, 车载自组织网, 全球导航卫星系统

Abstract:

In order to improve the average throughput performance of user effective data under highway scenario,a distributed channel access mechanism is proposed.The protocol sequence set is reused by road division.According to the characteristic of UI(User Irrepressibility) sequences,a few bits of feedback information are introduced for detecting the channel access order among nodes.Distributed TDMA(Time Division Multiple Access) is proposed for maximizing the throughput performance with a competition zone.The simulation results show that the throughput performance of UI-TDMA mechanism is more superior to classical method in a sparser distributed network or a higher PHY data rate or a larger communication range of node.

Key words: hybrid channel access mechanism, protocol sequence, time division multiple access (TDMA), vehicular ad hoc networks (VANET), global navigation satellite systems (GNSS)

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