Resource Allocation for D2D Communication With Multiple D2D Pairs Reusing Multiple Channels

In this letter, the goal is to maximize sum capacity of device-to-device (D2D) communication through a reuse of each radio channel by multiple D2D pairs while each D2D pair can access multiple channels. Since existing approaches cannot be easily extended to enable reuse of multiple channels by multiple D2D pairs in scenario with a high interference among the D2D pairs, we propose a novel resource allocation consisting of two phases. In an initial phase, all available channels are assigned by the Hungarian algorithm so that each channel is occupied by just one D2D pair. In a reuse phase, multiple D2D pairs are sequentially added to the individual channels according to their priority expressed by channel quality and received interference from already added D2D pairs. The proposal significantly outperforms existing solutions and reaches close to theoretical upper bound capacity despite a very low complexity of the proposed algorithm.