Device-to-device communication underlaying cellular networks with the leakage rate constraint

In this paper, we propose a novel resource sharing strategy to improve the overall system throughput of a device-to-device (D2D) communication system underlaying a cellular network. Aiming to optimize the overall system throughput, the constraint of the leakage data from the cellular user is illustrated, considering the D2D receiver as a malicious partner sharing the spectrum with it. The optimality is also discussed under the requirement of the quality of service (QoS) of the cellular user (CU). In particular, for a given D2D receiver, we propose an admission region of the D2D transmitter, where the leakage rate to the D2D receiver should be minimized and the QoS of the CU can also be satisfied. It does not allow the resource sharing between the cellular link and the D2D link if the D2D transmitter fails to belong to the admission region. Furthermore, an optimal power control algorithm and the D2D pair selection policy are developed to maximize the overall system throughput. Numerical results are given to show that the proposed scheme can improve the system performance effectively.