Vehicle density based multihop broadcast protocol in VANET

Jia-wei HUANG; Shao-hua ZHONG; Lian-hai LIU; Jian-xin WANG

doi:10.11959/j.issn.1000-436x.2016233

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Vehicle density based multihop broadcast protocol in VANET

Academic paper | 更新时间：2024-06-05

- Vehicle density based multihop broadcast protocol in VANET
- Journal on Communications Vol. 37, Issue 12, Pages: 32-41(2016)
- 作者机构：
  
  中南大学信息科学与工程学院，湖南长沙 410083
- 作者简介：
- 基金信息：
  
  The National Natural Science Foundation of China(61103204);The National Natural Science Foundation of China(61572530);The National Natural Science Foundation of China(61402541);The National Natural Science Foundation of China(61462007);The National Natural Science Foundation of China(61402542)
- DOI：10.11959/j.issn.1000-436x.2016233
  CLC： TP393
- Online First：2016-12，
  
  Published：25 December 2016
- 稿件说明：
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Jia-wei HUANG, Shao-hua ZHONG, Lian-hai LIU, et al. Vehicle density based multihop broadcast protocol in VANET[J]. Journal on Communications, 2016, 37(12): 32-41.
DOI：

Jia-wei HUANG, Shao-hua ZHONG, Lian-hai LIU, et al. Vehicle density based multihop broadcast protocol in VANET[J]. Journal on Communications, 2016, 37(12): 32-41. DOI： 10.11959/j.issn.1000-436x.2016233.

摘要

在车载自组网中，介质访问控制协议（MAC）的转发效率直接影响了数据消息的多跳广播传输性能。现有方法通常在每跳覆盖范围内选择最远节点来承担转发任务，通过降低转发次数实现快速多跳广播覆盖。然而，通过仿真实验和模型分析，当车辆密度变大时，现有方法导致信道竞争的接入延时剧增。因此，提出了一种基于IEEE 802.11p协议的多跳广播协议VDF，根据车辆密度自适应地选择转发节点。事故预警和在线游戏2种典型应用仿真实验结果表明VDF降低了全网广播消息的覆盖延时，同时取得了信道冲突程度和多跳覆盖速度的合理折中。

Abstract

In vehicular ad hoc networks (VANET)

the medium access control (MAC) protocol was of crucial importance to provide time-critical multihop broadcast. Contemporary multihop broadcast protocols in VANET usually choose the farthest node in broadcast range as the forwarder to reduce the number of forwarding hops. However

it was demonstrated that the farthest forwarder may experience long contention delay in case of high vehicle density. An IEEE 802.11p-based multihop broadcast protocol vehicle density based forwarding (VDF) was proposed

which adaptively chose the forwarder according to the vehicle density. The evaluation results in safety warning and online game applications show that

VDF could shorten broadcast delay by achieving the proper trade-off between the contention delay and coverage speed.

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references

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