Resource management for D2D underlaying cellular network with hybrid multiple access technologies

This paper investigates the resource management problem for device-to-device (D2D) underlaying cellular network. In particular, cellular users employ sparse code multiple access (SCMA) while D2D users employ orthogonal frequency division multiple access (OFDMA). In this system, the cross-tier interference between cellular users and D2D users is highly coupled and if not properly handled, the potentials of the two 5G key enabling technologies (i.e., SCMA and D2D) cannot be fully exploited. To tackle this problem, we first construct an interference graph to depict the cross-tier interference, based on which an efficient resource allocation algorithm is devised to well coordinate the interference. Then, we propose an easily implemented iterative power control scheme to optimize the transmit power of all users. Finally, simulation results exhibit the performance gain of our algorithms as compared with other schemes.