V2X通信中基于车辆分簇的资源分配机制

基于3GPP(3rd Generation Partnership Project)R15 SA WI阶段定义的两种V2X业务模型,在无基站覆盖区域进行自主资源选择时导致的碰撞和干扰问题,提出一种基于车辆分簇的资源分配机制。对场景中的所有车辆根据其地理位置和行驶方向进行分簇,根据车簇间的相对位置对所有车簇进行分组,进而划分不同的专属时隙资源;由每个簇中"头车"来担任资源协调与资源占用信息获取的角色。仿真结果表明,该机制在低时延要求场景下的性能较LTE-V2X现有自主资源选择的资源分配方式更优。

A RESOURCE ALLOCATION MECHANISM BASED ON VEHICLE CLUSTERING IN V2X COMMUNICATION

Based on the two V2 X traffic models defined in the R15 SA WI phase of 3 rd generation partnership project(3 GPP),a resource allocation mechanism based on vehicle clustering is proposed to solve the collision and interference problems caused by autonomous resource selection in the area without base station coverage.All vehicles were clustered in the scene according to the geographical location and driving direction,and then all vehicle clusters were grouped based on the geographical location of car cluster;different time slot resources were divided according to the different groups;the"head-vehicle"in each cluster played the role of resource coordination and resource occupancy information acquisition.Simulation results show that the performance of this mechanism under the autonomous resource selection is better than the resource allocation mode of LTE-V2 X.