A Capacity Oriented Resource Allocation algorithm for device-to-device communication in mobile cellular networks

This paper proposes a Capacity Oriented Resource ALlocation (CORAL) algorithm for resource allocation in device-to-device (D2D) communication underlaying mobile cellular networks. To achieve high system capacity, CORAL allows a D2D pair to share the resources of more than one cellular user. Meanwhile, it introduces the concept of a Capacity-Oriented REstricted (CORE) region for a D2D pair to determine a candidate cellular user set for the D2D pair in resource allocation, which excludes those cellular users that introduce a negative system capacity gain, and thus can help increase the system capacity and reduce the computational complexity of CORAL as well. Moreover, CORAL attempts to avoid the situation where different D2D pairs simultaneously choose the same optimal cellular user, which would otherwise cause severe inteferences between the different D2D pairs and larger interference on the optimal cellular user. In addition, CORAL can ensure that each D2D pair can be allocated the resources of at least one cellular user. Simulation results show that CORAL can achieve a good performance in terms of both the system capacity and the rate loss of all cellular users.