基于CACC的译码转发协作方式的中断概率分析

Outage probability analysis of decode-and-forward based on CACC

针对车辆队列快速行驶时用户间实时距离变化给车辆接收信号的可靠性带来挑战的问题,基于协同自适应巡航控制(cooperative adaptive cruise control,简称CACC)系统,建立实时距离变化反映时变特性的车辆行驶队列模型。采用译码转发协作方式降低车辆间信息传输的中断概率,增加了车队列模型中车辆信息传输的可靠性。数值仿真结果表明,该译码转发方式相对于直传方式,中断性能提高了8.7%。

Aiming at the problem that the real-time vehicles distance variations will lead to the unreliable performance of the vehicle receiving signal as the vehicles move rapidly, a vehicle queue model with time-varying characteristics is presented on cooperative adaptive cruise control system. A decode-and-forward cooperative strategy is proposed to reduce the outage probability and to increase the reliability of the vehicle queue model. The numerical simulation results show that the outage probability performance of the proposed scheme will improve about 8.7% than that of the direct transmission scheme.