Uplink resource sharing of multiple D2D links underlaying cellular networks

Cellular network assisted device-to-device (D2D) communication relies on efficient resource sharing strategies between cellular users (CUs) and D2D users. This paper investigates uplink resource sharing between multiple D2D links and CUs. Upon guaranteeing the quality of normal cellular communication, we try to explore the full benefit of D2D communication by allowing multiple D2D links to share the same spectrum resource made available by the CU, which, however, leads to a difficult nonconvex optimization problem. We propose an efficient algorithm to jointly optimize the transmit powers of the D2D links and the CUs. The superiority of the proposed resource sharing strategy is demonstrated through numerical examples.