Throughput improvement oriented resource allocation for device-to-device aided cellular systems

In this paper, throughput improvement in device-to-device (D2D) enabled cellular systems is investigated. An uplink resource allocation policy can be implemented, by formulating the reuse relationship as relative position relationship under the constrains of both interference limitation area (ILA) and signal-to-interference-plus-noise ratio (SINR), to find the suitable reuse location relationship between D2D user equipments (DUEs) and cellular user equipments (CUEs). The DUEs can thus be allowed to reuse the licensed spectrum. Furthermore, the proposed resource-allocation algorithm can be readily formulated as an objective function of "maximizing the sum throughput subject to the SINR constrains at both CUEs and DUEs". Numerical results indicate that the proposed algorithm can effectively enhance both the sum throughput and the D2D-access probability (DAP) without seriously impairing the performance of the conventional CUEs.