论文部分内容阅读
在蜂窝网中进行D2D通信已被证明是一个有效的增加系统频谱效率的通信方式。借助于这种通信方式,D2D发送者在直达链路上与其接收者进行通信时与蜂窝链路共享相同的频率资源。在本文中,提出一个用户设备配对和功率控制的方案。它在满足每个D2D对设备以及每个蜂窝用户设备的信干噪比要求下,最小化D2D链路和蜂窝链路的总干扰。基站采用图论的方法为每个蜂窝用户设备和每个D2D设备分配最优的功率,使用修正Hungarian算法选择一个最优的蜂窝用户设备与D2D对进行配对。仿真结果表明,文中提出的方案不仅能够降低D2D用户和蜂窝用户产生的干扰,而且能够增加允许的D2D连接。
D2D communication in cellular networks has proven to be an effective way to increase the spectral efficiency of the system. With this method of communication, the D2D sender shares the same frequency resources as the cellular link when communicating with its receiver over the direct link. In this paper, a user equipment pairing and power control scheme is proposed. It minimizes the total interference of the D2D link and the cellular link while meeting the signal to interference and noise ratio requirements of each D2D-to-device and each cellular user equipment. The base station allocates the optimal power for each cellular user equipment and each D2D equipment by using a graph theory method and selects a best cellular user equipment to pair with the D2D pair using a modified Hungarian algorithm. Simulation results show that the proposed scheme can not only reduce the interference of D2D users and cellular users, but also increase the allowable D2D connections.