An Adaptive Time Division Scheduling Based Resource Allocation Algorithm for D2D Communication Underlaying Cellular Networks

This paper proposes an adaptive time division scheduling (ATDS) based resource allocation algorithm for device-to-device (D2D) communication underlaying cellular networks. The proposed ATDS algorithm introduces an adaptive TDS strategy, in which all D2D pairs in a cellular system are adaptively scheduled into a series of timeslots for communication based on an improved proportional fairness algorithm. For a particular timeslot, the scheduling priority of each D2D pair is first determined based on both the data transmission rate and the rate satisfaction ratio of each D2D pair. Then, a set of D2D pairs are assigned to the timeslot based on the priorities determined and only those D2D pairs with higher priorities are assigned to the timeslot. After that, the spectrum resources of cellular users are allocated for each D2D pair assigned to the timeslot. Simulation results show that the proposed ATDS algorithm can not only achieve a larger system throughput but also achieve a better fairness as compared with a couple of resource allocation algorithms that do not use time division scheduling.