Date Added: Mar 2012
The authors investigate the possible performance gains of power control in multi-layer cellular systems where microcells and picocells are distributed within macrocells. Although multi-layers in cellular networks help increase system capacity and coverage, and can reduce total energy consumption; they cause interference, reducing the performance of the network. Therefore, downlink transmit power levels of multi-layer hierarchical cellular networks need to be controlled in order to fully exploit their benefits. In this paper, they present an analytical derivation to determine optimum power levels for two-layer cellular networks and generalize their solution to multi-layer cellular networks.