A Resource Allocation Algorithm Based on DILA for D2D Communication in LTE-A Multi-Cell Network

In the multi-cell scenario of LTE-A system, interference management is an important subject in Device to Device (D2D) communication when the work is in the underlay mode. In this paper, a multi-cell resource allocation algorithm based on DLIA (Dynamic Interference Limitation Region) is proposed for the interference generated between the D2D link and the cellular link. First, for the intra-area interference, the number of multiplexed cellular users is calculated according to the channel state of the D2D user, and the dynamic interference limitation area is obtained. Then, for the inter-area interference, a priority-based FFR(Fraction Frequency Reuse) algorithm is selected to determine the reuse resources, thus determining the multiplexing relationship. Finally, the simulation results show that the proposed algorithm can dynamically allocate resources without limiting the number of reusable resources of D2D users, thus effectively improving the overall capacity of the system.