Joint User Association and Resource Allocation in the Downlink of Heterogeneous Networks.

In this paper, we consider the intercell interference coordination (ICIC) problem in heterogeneous cellular networks with randomly deployed small-cell base stations (BSs). Current research on ICIC mainly focuses on optimizing the spectrum and power allocations at BSs, whereas the user-BS association is treated as a separate issue. Nevertheless, the user-BS association problem is an important issue...