User Association, Resource Allocation and Power Control in Load-Coupled Heterogeneous Networks

This paper aims at network utility maximization via jointly optimizing user association, resource allocation and power control in a load-coupled heterogeneous network. We first obtain that the optimal condition for load control of each base station (BS) is to be either fully loaded or shut down. With the help this observation, the original problem is greatly simplified which allows us to propose an alternating optimization design. We transform the subproblem in the alternative optimization into a convex one and efficiently solve the other subproblem via the gradient projection method. Simulation results show that the proposed algorithm achieves better performance than the conventional network utility maximization methods.