Common Rate Maximization in Two-Layer Cellular Radio Systems
The authors address the common rate maximization problem in two-layer cellular networks where high-power and low-power base stations are co-located in the same geographical area. Interference becomes a serious problem when two or more layers are considered in the same network. For this purpose, power control in the downlink needs to be used to limit the interference and to fully exploit the benefits of additional layer deployments. They present an analytical framework to the common rate maximization problem both with and without maximum power constraints and propose a heuristic algorithm. They present simulation results for the proposed approaches in a two-layer network setup and observe a significant common rate increase compared to single-layer wireless networks.