基于TDMA的车辆安全信息广播MAC协议设计  

MAC Protocol Design for Vehicle Safety Information Broadcast Based on TDMA

作　　者：杨焱[1] 张玥[1] 

机构地区：[1]北京交通大学电子信息工程学院,北京100044

出　　处：《移动通信》2015年第22期79-84,共6页Mobile Communications

摘　　要：安全类信息的广播在车联网面向道路交通安全的应用中起到至关重要的作用。针对车联网中安全类信息的可靠广播问题,从MAC层面设计了基于TDMA的增强型自适应安全信息广播协议。该协议根据RSU覆盖范围内车辆的数目变化,动态调整帧长和时隙分配,并优先调度低密度方向上的车辆,以适应不同车辆密度条件下的安全信息广播。仿真结果表明,提出的协议相对于传统的广播协议具有更好的网络性能。Safety-related information broadcast plays an important role oriented to road safety applications of in VANETs. According to reliable safety-related information broadcast in VANETs, an adaptive safety information broadcast protocol based on TDMA at MAC layer was designed. The proposed protocol dynamically adjusts frame length and timeslot allocation according to the number variation of vehicles in RSU coverage, and preferentially schedules vehicles at the direction of low density to adapt to safety information broadcast in the condition of different vehicle densities. Simulation results demonstrate that the proposed protocol has better network performance than traditional broadcast protocols.

关 键 词：车联网 安全信息广播 MAC TDMA 

分 类 号：TN92[电子电信—通信与信息系统]