A Strategy of Reusing Mode Selection for Device to Device Communication

Abstract

Interference coordination is the focus for Device-to-Device (D2D)communication. Due to the fact that many works adopt single reusing mode for coordinating interference in D2D communication systems and the efficiency of spectrum is low, a strategy of reusing mode selection is proposed. The aim is let D2D pairs can flexibly select the most suitable reusing mode between one-to-one and multiple-to-one reusing mode according to the signal to interference plus noise power ratio (SINR)performance of D2D pairs and that of the cellular system. The selecting rule of reusing mode is derived, and four radiuses are achieved to determine the reusing mode and select the cellular user to be reused. By using the rule to select a reusing mode, not only the communication quality of D2D communication and cellular communication can be improved, but also more D2D users can successfully establish communication even at the case of insufficient spectrum resources. Simulation results show that the D2D system with the proposed reusing strategy can significantly improve the overall system throughput.