Joint Power and Resource Allocation for Non-Uniform Topologies in Heterogeneous Networks

We study the Enhanced Inter-Cell Interference Coordination (eICIC) for co-channel deployments of pico cells in macro cells. In particular, we consider a non-uniform topology where the number of pico cells within the coverage area of each macro cell is different. To alleviate the interference caused by the co-channel deployment, the macro cells employ low-power almost-blank subframe. We consider the joint problem of power and resource allocation, where the goal is to maximize the proportional fairness utility of the system. A convergent iterative algorithm is proposed and simulation results demonstrate that our proposed algorithm improves both the system throughput and user fairness compared to existing schemes.