An interference management strategy for device-to-device underlaying cellular networks with partial location information

Abstract

A new interference management strategy is proposed for device-to-device (D2D) underlaying cellular networks without the exact location information of cellular user equipments (CUEs). We consider the case where one D2D pair reusing the same channel with cellular users, both uplink and downlink. The base station (BS) only knows the distances that D2D user equipments (DUEs) and CUEs away from BS, instead of exact location information. First, we present a power control mechanism to limit the maximum transmit power of the D2D transmitter to control the harmful interference from D2D system to CNs. Then, an interference limited ring (ILR) control strategy is proposed to insure that the outage probability of the D2D communication caused by the interference from CUEs is less than a predetermined threshold e. The exact radius of ILR is derived as a closed form. The D2D users can not reuse the channels of those CUEs which are located in the ILR to guarantee that the outage probability is less than e. Through numerical simulation, we analyze the influence of three key parameters and come up with several practical suggestions for allocating channel resources.