蜂窝网络中全双工D2D通信功率控制

Power control for full-duplex D2D communications underlaying cellular networks

在蜂窝网络中,采用全双工传输的设备直通(D2D)通信可以共享蜂窝通信的信道资源,提升频谱利用率和系统吞吐量。针对单对全双工D2D用户复用单个蜂窝用户的上行信道资源时,用户之间会产生同频干扰的问题,提出了一种低复杂度的功率控制算法。该算法在保证全双工D2D用户和蜂窝用户(CU)的服务质量(Qo S)的前提下,最大化全双工D2D链路的吞吐量。仿真结果表明,该算法能够提高全双工D2D链路的吞吐量;全双工D2D链路吞吐量取决于蜂窝用户的Qo S要求、相对距离以及自干扰消除数量的限制。

Device-to-device（D2D） communications that based on the wireless full-duplex transmission mode can not only reuse the cellular users＇ spectrum resource, but also significantly improve the spectral efficiency and the system throughout in wireless cellular networks. However, full-duplex D2 D communications may generate same frequency interference to the reused cellular user（CU） while full-duplex D2 D users share the same resources as CU in uplink. A low-complexity power control algorithm was proposed to maximize the full-duplex D2 D links throughput while guaranteeing the quality of service（Qo S） requirements for full-duplex D2 D users and CU. Numerical results show that the proposed algorithm can improve the full-duplex D2 D links throughput. Moreover, the performance of full-duplex D2 D communications depend on the Qo S requirements of CU, the distance of D2 D pair and self-interference cancelation amounts.