基于总能效最优化的终端匹配设计和实现

Design and implementation of terminal match based on total energy efficiency optimization

终端直通通信技术(Device-to-Device communication,D2D)是指相距较近的用户设备(user equipment,UE)可不借助于基站而直接进行通信,它可以有效提高传输速率和频谱利用率。受限于电池的容量,基站调度上应尽可能使终端的续航时间更长。为此,本文旨在追求单位能量的传输比特率最大化,即能效最大化目标。本文在构建蜂窝用户与D2D用户资源复用场景下的能效模型基础上,将目标实现分为两个步骤:1)终端最优发射功率的设置,利用准凸函数的性质,通过最优化的方法迭代求解蜂窝和D2D用户各自的最优功率,使得复杂度大为降低;2)利用KM算法实施蜂窝用户与D2D对的配对。通过仿真验证,使用本文提出的算法相对于以最大功率发送的情况下可以获得约40%左右的增益。

Device-to-Device（ D2D） communication refers to that user devices are able to communicate directly without the help of base station. Limited by the capacity of batteries,the schedulerat the base station should make the battery life as long as possible.Therefore,the purpose of this paper is to maximize the transmission bit rate by using unit energy,namely maximize energy efficiency goals. By constructingthe energy efficiency model for the resource reuse mode between the cellular users and the D2D users,two steps are employed to realize this goal： 1） the optimal transmit power configuration for the terminals is achieved by the multiple iterations based on the property of quasi convex function,which results in the greatly reduced complexity; 2） Pairing thecellular users and the D2D users by KM algorithm. The simulation result shows that the proposed algorithm has got about 40% gain compared by the method with the maximum transmit power.