A Fog-Assisted TDMA MAC for Collision Avoidance in VCNs

LIU Bing-yi; QIN Jing; XIONG Sheng-wu; DENG Dong-xiao; WU Li-bing; CHENG Chuan-qi

doi:10.12263/DZXB.20201020

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A Fog-Assisted TDMA MAC for Collision Avoidance in VCNs

更新时间：2025-12-08

- A Fog-Assisted TDMA MAC for Collision Avoidance in VCNs
- Acta Electronica Sinica Vol. 49, Issue 5, Pages: 843-850(2021)
- 作者机构：
  
  1. 武汉理工大学计算机科学与技术学院,湖北,武汉,430070
  2. 武汉大学国家网络安全学院,湖北,武汉,430000
  3. 武汉理工大学计算机科学与技术学院,湖北,武汉,430070
  4. 武汉大学国家网络安全学院,湖北,武汉,430000
- 作者简介：
- 基金信息：
- DOI：10.12263/DZXB.20201020
  CLC： TP393
- Published：2021
- 稿件说明：
移动端阅览
LIU Bing-yi, QIN Jing, XIONG Sheng-wu, et al. A Fog-Assisted TDMA MAC for Collision Avoidance in VCNs[J]. Acta Electronica Sinica, 2021, 49(5): 843-850.
DOI：

LIU Bing-yi, QIN Jing, XIONG Sheng-wu, et al. A Fog-Assisted TDMA MAC for Collision Avoidance in VCNs[J]. Acta Electronica Sinica, 2021, 49(5): 843-850. DOI： 10.12263/DZXB.20201020.

摘要

智能交通系统的产生和发展对车辆通信的介质访问控制(Medium Access Control

MAC)协议提出了更高的要求.被广泛使用的基于信道竞争的载波侦听多路访问(Carrier Sense Multiple Access

CSMA)协议存在不确定时延问题

基于时分多址(Time Division Multiple Access

TDMA)的MAC协议可以有效解决该问题.然而

TDMA协议仍然存在数据传输碰撞.为了解决数据传输碰撞问题

本文提出一个结合雾计算的通信框架

在此基础上提出一种集中式TDMA MAC协议.该协议利用雾计算的低时延优势、计算和协同功能预测即将发生的数据传输碰撞

通过调度时隙以减少数据传输碰撞.实验结果显示

该方法有效减少了数据传输碰撞

提高了信道资源利用率.

Abstract

The emergence and development of intelligent transportation system (ITS) put forward higher requirements for the medium access control (MAC) protocol of vehicle communication. The widely used carrier sense multiple access (CSMA) protocol based on channel competition has the problem of uncertain time delay. MAC protocol based on time division multiple access (TDMA) can effectively solve this problem. However

TDMA protocols cannot eliminate data transmission collisions. This paper propose a communication framework combining fog computing.And a centralized TDMA MAC protocol is proposed

which could predict upcoming data transmission collisions by taking advantage of the low-latency of fog computing. Then

time slots could be well scheduled to reduce data transmission collisions. Experimental simulation results show that this method effectively reduces data transmission collisions

and improves channel resource utilization.

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