In-Band Emission Interference in D2D-Enabled Cellular Networks: Modeling, Analysis, and Mitigation

Next-generation network is considered as a device-to-device (D2D)-enabled system. The overlay in-band scheme can be used by the cellular user equipments and D2D user equipments (DUEs) to send data. The cellular and D2D links experience the in-band emission interference (IEI) from the DUEs that use the adjacent frequencies. This paper models the IEI impact by using stochastic geometry and analytically investigates this impact on cellular and D2D links. The IEI inter-cell and IEI intra-cell are separately assessed, and the expected D2D resource block (DRB) reuse factor is evaluated. Furthermore, the distance-density-based strategy is proposed to mitigate the IEI by controlling the number and location of served DUEs for each DRB. Also, the optimal power allocation algorithm is proposed by calculating the optimal DUEs transmission power profile that mitigates IEI and maximizes DUEs sum rate. The performance is improved significantly for the proposed methods. The application scenario is identified for each mitigation method.