基于语音时隙机制的车载自组网MAC协议

Media Access Control Protocol Based on Voice Time Slot Mechanism in VANET

在节点高速运动的车载组网多跳通信中,如何快速选择下一跳中继节点是目前无线自组网亟待解决的问题。为此,提出一种基于类语音时隙划分信道竞争机制的时分复用协议,采用类似语音优先权接入的语音突发方式解决多跳中继选择问题。仿真结果表明,在不同节点分布的运动场景下,使用语音突发方式的MAC协议较传统的时分复用随机接入方式具有更短的接入延时与更低的网络开销。

In Vehicle Ad Hoc Networks（VANET） multi-hop communication with nodes of high speed,a problem of how to choose a next hop relay rapidly makes a significant sense.In this paper,a slot assignment for voice access named black-burst scheme based Time Division Multiple Address（TDMA） is proposed for channel access contention.The problem of relay selection can be solved as a method of voice access control with priority.Simulation results show that in scenarios of movement with different nodes distribution,a shorter access delay and a lower cost can be obtained in MAC protocols based on black-burst mechanism compared with the traditional TDMA random channel access method.