基于阈值的车联网信标传输功率控制算法

研究了基于阈值的车联网信标传输功率控制算法.在保证网络最大连通性前提下,通过预设信道负载阈值,规定信道负载的合理区间,根据阈值调整目标节点载波侦测范围内所有车辆的信标传输功率,将信道负载控制在一定范围内,从而避免信道拥塞.通过仿真八车道高速公路基本路段和实际行车实验,对算法进行了验证及相关分析.结果表明该算法能有效地控制信道负载,避免信道拥塞,增强了车载网络无线信标传输的稳定性和健壮性.

Beacon Transmission Power Control Algorithm Based on the Preset Threshold in VANETs

Beacon transmission power control algorithm based on the preset threshold was put forward in vehicle ad-hoc networks (VANETs). First， according to the preset channel load threshold， a reasonable channel load interval is adjusted to ensure that all the nodes transmit beacon messages. Based on the beacon transmission power of all the vehicles in the carrier sensing range of the target node， the channel load is controlled within a certain range to avoid channel congestion. Then， by simulating the basic sections of eight-lane highways and actual road driving tests， the beacon transmission power control algorithm based on the preset threshold is verified with the correlation analysis. The experimental results show that this power control algorithm can effectively control channel load， avoid channel congestion， and enhance the stability and robustness of wireless beacon message transmission in VANETs.