An Exclusion-Based D2D Activation Scheme in Cellular Networks with Hybrid Spectrum Allocation

Despite of the promising benefits brought by device-to-device (D2D) technique, the attainable performance gains in an underlaying network may still be eroded by the severe mutual interference between cellular and D2D communications. To address this critical issue, we first propose an exclusionbased D2D activation (EDA) scheme with hybrid spectrum allocation to suppress the mutual interference and improve the user performance, where only the D2D users outside the exclusion regions are active and share the frequency band with the cellular users within the exclusion regions. Secondly, we establish a stochastic geometry-based analytical framework and analyze the success probabilities of both cellular and D2D users, where the distribution of the activated D2D pairs follows a bipolar Poisson hole process. The results demonstrate the significant performance improvement and the effectiveness on the interference suppression brought by the proposed EDA scheme and the hybrid spectrum allocation.