Interference alignment in device-to-device LAN underlaying cellular networks

This paper studies a Device-to-Device (D2D) LAN underlaying a cellular uplink, where multiple D2D users (DUs) intend to communicate with a D2D receiver. An interference alignment based D2D communications scheme is proposed to manage the interference caused by D2D devices on the cellular network. The scheme can prevent certain links of cellular users (CUs) from interference of D2D communications. In addition, the interference leakage of D2D communications on the remaining links of CUs is reduced by more than half on average, which means the performance of cellular link can be further protected by the proposed scheme. Further, the rate of D2D LAN can be improved by taking advantage of multiuser diversity. The performance analysis on both D2D LAN and cellular link is provided.