关键词: 安全预警信息（SWM）, 车辆健康状况评估, 通信需求, 自适应分簇

Abstract: V2V Safety Warning Message（SWM） exchange is considered as an important road safety improvement technology. High probability of SWMs generation easily leads to a regional information storm, which shall seriously affect the SWM transmission performance. To reduce regional transmission load, in this paper, a new concept, i.e.communication demand, is defined to illustrate inter-vehicles relationship, which could be considered as basis to establish V2V connection. Furthermore, according to communication demand relation, a SWM-oriented cluster algorithm is proposed to realize road vehicles adaptive clustering. In the proposed algorithm, a health-evaluation based Cluster Head（CH） selection method is employed to increase cluster’s stability and decrease network overhead. Then an adaptive cluster range adjustment mechanism, which adjusts cluster radius level according to the number of inter-cluster communication demands, is presented to control the transmission rang so that decrease the regional information storm and improve the SWM communication efficiency. Simulations on Anylogic platform are done to investigate the performance of the proposed method. Simulation results show that the proposed clustering algorithm has strong stability and high communication efficiency for SWM transmission.

Key words: Safety Warning Message（SWM）, vehicle health evaluation, communication demand, adaptive clustering