车载自组网中基于分簇的无线功率控制

VANET wireless-power-controlling based on clustering

车辆分布不均且不断变化导致固定无线功率不能很好地适应车载自组网的实际环境,针对该问题,提出了一种动态无线功率控制方法来根据车辆的分布情况控制节点的无线功率。为判定车辆的分布情况,提出了一种基于相邻车辆间距的分簇算法,在此基础上,设计了相关无线功率控制算法来实现上述无线功率控制目标。理论分析表明,该方法能有效地根据车辆的分布情况来控制无线功率,提高了网络的连接率,并在网络负载较高时,降低了包的传输时延和提高了包的接收率。

Considering the uneven and changing distribution of the vehicle,fixed wireless power dose not adapt to vehicle Ad hoc networks well. To solve this problem,this paper proposed a dynamic wireless power control method. Firstly it proposed a clustering algorithm to determine the vehicle distribution. Then it designed the wireless power controlling algorithms for vehicle Ad hoc networks,which determined the vehicle wireless power according to the vehicle distribution. Theoretical analysis shows that the proposed method can effectively control wireless power based on the vehicle distribution. Simulation results show the method improves the network connection rate,and when the network load is high,reduces the packet delay and improves the packet reception rate.