基于信干噪比的D2D通信功率控制与资源分配

摘要

In order to solve the problem of co-channel interference(CCI) and the deterioration of system performance after introducing the device-to-device(D2D) communication to the Long Term Evolution(LTE) system,this paper proposes a multi-cell D2D communication resource allocation scheme based on signal-to-interference plus noise ratio(SINR).The scheme converts cellular user(CU) into D2D user by adjusting the threshold of the signal-to-noise ratio(SNR) and releases spectrum resource,and then obtains a better resource allocation strategy.Meanwhile,an allocation algorithm is proposed to reduce the inter-cell interference(ICI) based on the inter-cell D2D competition mechanism.Simulation shows that the proposed algorithm can effectively increase the system capacity and enhance the cell edge D2D users' fairness.%为了优化长期演进(LTE)系统引入设备直传(D2D)通信后带来的同频干扰、系统边缘用户性能恶化问题,提出一种基于信干噪比(SINR)的多小区D2D通信资源分配方案,通过调整信干噪比阈值将部分蜂窝用户(CU)转化为D2D用户并释放频谱资源进而获得较佳的资源分配策略,同时提出一种基于小区间D2D竞争机制的配置算法有效降低小区间干扰.仿真表明,算法能够有效提升系统容量,并提升小区边缘D2D用户公平性.