VIMAC:用于VANET中高可靠和低延迟传输的车载信息媒体访问控制协议

Yuanxin Sun, Ruoxin Kuai, Jianquan Wang, Wanbin Tang, Xiaoping Li
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引用次数: 0

摘要

基于时分多址(TDMA)的车辆自组织网络(vanet)可以通过提供对延迟和可靠性有严格要求的安全相关应用来提高道路安全水平。本文提出了一种新的基于tdma的介质访问控制(MAC)协议,该协议能够实现高可靠和低延迟的传输。我们提出的方案包括预测和分配两个过程。前一个过程,即预测,可用于在碰撞发生之前减轻部分碰撞。由于车辆的位置,仍然存在不可预测的碰撞。在预测过程不可用的情况下,分配过程可以借助上层信息减少一部分不可避免的碰撞。我们建立了一个系统级仿真平台,将SUMO和MATLAB结合在一起,对所提出的方案和基准协议进行比较。仿真结果表明,该方案可以优化安全相关应用的可靠性能。此外,较低的碰撞概率导致每次成功传输前的重传次数较少,因此分析和仿真表明,我们提出的方案具有较低的延迟性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
VIMAC: A Vehicular Information Medium Access Control Protocol for High Reliable and Low Latency Transmissions in VANET
Time division multiple access (TDMA)-based vehicular ad hoc networks (VANETs) can enhance road safety level through providing safety related applications which pose stringent latency and reliable requirements. In this paper, we propose a novel TDMA-based medium access control (MAC) protocol which is able to attain high reliable and low latency transmissions. Our proposed scheme contains two processes, prediction and allocation. The former process, prediction, can be used to mitigate a portion of collisions before their occurrences. There still exists unpredictable collisions due to the vehicular placement. In the case of prediction process being unavailable, the allocation process is able to reduce a portion of the unavoidable collisions with the help of upper layer information. We build a system level simulation platform that merges SUMO and MATLAB to compare the proposed scheme and baseline protocols. The simulation results show that our scheme can optimize the reliable performance for safety related applications. Besides, a lower collision probability leads to fewer retransmissions before each successful transmission, therefore, our proposed scheme can provide low latency performance as is shown by the analysis and simulations.
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