基于D2D的C-V2V车载协作通信资源分配算法

Resource Allocation Algorithm in D2D-Enabled C-V2V Vehicle Cooperative Communication

针对基于设备到设备(device-to-device,D2D)的蜂窝网络下车载无线通信技术(cellular-vehicle to everything,C-V2X)中复用蜂窝用户资源带来的能效问题,提出了一种能效优化算法。通过新的功率控制方法最大化车载用户(vehicle user,V-UE)总能效,并利用能量收集技术提高V-UE能效。该算法采用拉格朗日乘数法减少约束条件数目,利用改进的Dinkelbach方法将原问题转换为等效减式优化问题,并求出V-UE功率控制范围。数值仿真结果表明,该算法能够在V-UE用户之间的不同距离内获得最优能效。

To solve the energy efficiency problem of sharing the cellular user resources in Device-to-Device(D2D)-based cellular-vehicle to everything(C-V2X)communication system,an energy efficiency optimization algorithm is proposed,where a new power control approach is presented to maximize the total energy efficiency of the vehicular-users(V-UEs)and the energy harvesting technology is utilized to improve the energy efficiency of the V-UEs.In the proposed algorithm,reducing the number of constraints through using Lagrangian multiplier method,the modified Dinkelbach method is utilized to convert the original problem into an equivalent subtraction optimization problem,and the range of V-UE power control is obtained.Finally,the numerical simulation results show that the proposed algorithm can obtain the optimal energy efficiency within different distances between V-UE users.