Resource Allocation and Power Control for Heterogeneous Cellular Network and D2D Communications

Improving network capacity and reliability while decreasing delay and providing acceptable QoS in 5G wireless networks are one of the most challenging drawbacks to solve nowadays. In this paper, we propose a joint algorithm for resource allocation and power control based on a Stackelberg game considering a heterogeneous network (HetNet) with several small base stations deployed in the coverage area of one macrocell coexisting with multiple device-to-device communications. Small BS and D2D are introduced in mobile communications to improve spectral efficiency and avoid or reduce the interference caused between layers. Hybrid Access small cells grant access to public users in order to offload traffic from the macrocell. Furthermore, D2D allows direct connection between two devices without connection to the macro base station, releasing resources in the macrocell. To estimate the power that must be transmitted by mutual agreement such as that interference is minimized, we propose to use a game that is solved in a Stackelberg equilibrium and that also ensures that the D2D communication continues with an optimal transmission power. Simulation results show that the proposed model reduces interference in the HetNets while increasing the network throughput.