联合功率控制的D2D资源分配算法

Resource Allocation Algorithm Joint Power Control for Device-to-Device Communication

针对D2D通信引入LTE网络中同频干扰以及能耗过大问题,首先基于模糊聚类算法,将D2D用户分成若干个D2D用户组,并且基于中断概率最小为每个D2D用户组寻找最优蜂窝用户资源,以降低用户间干扰、提高系统吞吐量.其次结合上述资源分配提出了一种有效的功率控制方案,调节资源分配后用户组内D2D用户的发送功率,以提高系统能量效率.仿真结果表明:该算法降低了系统干扰,提高了系统吞吐量以及系统能量效率,同时又保证了D2D用户获得无线资源的公平性.

To solve the problem of co-channel interference and excessive energy consumption when D2D communication was used to LTE network,an algorithm of joint power control and resource allocation was proposed in this research. Firstly,in order to reduce the interference between the users and improve the system throughput, a resource allocation algorithm was proposed based on fuzzy clustering, D2D users were divided into several D2D user groups based on minimum outage probability to research optimal cellular user resource for each D2D user group. Secondly, an effective power control scheme was proposed to regulate the transmission power of D2D users in the D2D user group, which improved the energy efficiency of the system. Simulation results show that the proposed algorithm can reduce the system interference, improve the system throughput and system energy efficiency, and ensure the fairness of D2D users to access the radio resources.