基于信道负载预测的VANET传输功率控制算法

Abstract: In VANET, when traffic flow reaches a certain density will cause the channel congestion, thus causing inefficiency of cooperative security applications. Aiming at this issue, a beacon message transmission power control algorithm based on channel load forecasting was designed. First of all, evaluate the current time channel load by channel busy time ratio(CBR) . Secondly, predict the next time channel load by the Autoregressive Integrated Moving Average Model(ARIMA) . Finally, compare the value of channel load forecasting with the preset threshold, and adaptive adjustment of the next moment transmission power to avoid channel congestion. The simulation experiment shows that the algorithm can effectively reduce the communication transmission delay and avoid channel congestion, ensuring that the data be sent reliably.