Abstract
In a device to device (D2D) communication underlaying cellular network, total system sum rate can be improved if cellular user equipments (UEs) and D2D pairs share resource blocks (RBs). We consider such an optimization problem where the objective is to maximize the total sum rate of the system while sharing RBs among cellular UEs and D2D pairs and maintaining some quality of service (QoS) requirements. Most of the existing algorithms consider that sharing can only improve the sum rate. However, some sharing can also decrease the sum rate. Considering this observation, we design an optimal algorithm based on weighted bipartite matching which avoids such sharing and maximize the total system sum rate. We prove that our algorithm is optimal and validate the results through simulations which shows that our algorithm outperforms other existing heuristics in terms of maximizing system sum rate. Our algorithm also performs better in terms of total interference introduced through the sharing of resource blocks among cellular equipments and D2D pairs.
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