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在5G系统中,毫米波(mm Wave)与终端直通技术(Device-to-Device,D2D)通信有利于提升系统吞吐量和频谱利用率。针对28GHz下的underlay蜂窝网络中进行D2D资源分配,并考虑如何减少D2D用户在蜂窝网络中复用蜂窝资源时所带来的整体干扰。首先,利用线性相关方法找出每一个D2D用户可复用的蜂窝用户集合;其次,为了确保D2D用户的通信质量,对D2D用户进行功率控制;最后为了达到最大化系统总吞吐量的优化目标,提出一种基于干扰管理的启发式算法,并利用匈牙利算法求出最优匹配。仿真结果表明,所提算法与已有方案相比能够有效地减少干扰,从而提高系统的总吞吐量和频谱利用率。
In 5G systems, mm Wave and Device-to-Device (D2D) communications help improve system throughput and spectrum utilization. D2D resource allocation for underlay cellular networks at 28 GHz and consider how to reduce the overall interference caused by D2D users when multiplexing cellular resources in the cellular network. Firstly, the linear correlation method is used to find out the set of reusable cellular users for each D2D user. Secondly, in order to ensure the communication quality of D2D users, the power of D2D users is controlled. Finally, in order to achieve the optimization goal of maximizing the total system throughput, A heuristic algorithm based on interference management is proposed and the best match is obtained by the Hungarian algorithm. The simulation results show that the proposed algorithm can reduce the interference effectively compared with the existing schemes, so as to improve the total throughput and spectrum efficiency of the system.