基于能量收集的UAV-D2D网络资源分配算法

为更好地利用周围环境中的射频信号能量,提升终端直连(D2D)通信的运行时间和无人机(UAV)通信的频谱利用率,该文提出一种基于能量收集的UAV-D2D网络资源分配算法.考虑UAV最大发射功率和移动性约束,蜂窝用户和D2D用户的最小速率约束,建立了系统和速率最大化的多变量耦合资源分配问题.利用连续凸近似和变量替换方法将混...

Resource Rllocation for UAV-assisted D2D Communications with Energy Harvesting

In order to utilize better the surrounding radio-frequency energy and improve the operation lifetime of Device-to-Device (D2D) communications as well as the spectrum efficiency of Unmanned Aerial Vehicle (UAV) communication, a resource allocation algorithm is proposed for UAV-D2D networks with energy harvesting. Considering the constraints of the maximum transmit power and the mobility of the UAV, the minimum rate requirements of both cellular users and D2D users, a multivariable coupling resource allocation problem is formulated to maximize the sum rates of both cellular users and D2D users. The mixed-integer nonlinear programming problem is transformed into a convex optimization problem by using the successive convex approximation and variable substitution methods, where the closed-form solutions are obtained by the using Lagrange dual method. Simulation results demonstrate that the proposed algorithm has good convergence performance and higher system capacity.