Outage Analysis based Channel Allocation for Underlay D2D Communication in Fading Scenarios

Device-to-Device (D2D) communication has been proved to be a promising technique to efficiently utilize the radio spectrum thereby enhancing the capacity and meeting the huge data rate requirements of the future wireless networks. However, in underlay D2D communications, channel allocation (CA) is a challenging problem so as to limit the cross-tier interferences below a certain threshold. Most of the existing works on CA are based on maintaining minimum quality-of-service (QoS) requirements only for cellular users (CUs), or the D2DQoS constraints in a non-fading scenario. Moreover, most of them assume that the central controlling entity has all the prior information about the incoming D2D users, which appears unfeasible. In this work, we consider a more realistic underlay D2D communication scenario, and introduce an outage probability-based QoS constraint on the D2D links for enhanced reliability; in the presence of the combined effect of path-loss and fading. The channels are allocated online by maximizing the sum-outage-capacity of the full-duplex D2D network. The efficacy of the CA algorithm has been evaluated through rigorous simulations and the results have been numerically analyzed.