Coordinated Downlink Multi-Point Communications in Heterogeneous Cellular Networks
In this paper, the authors assess how coordination among base stations can be exploited to improve downlink capacity in Fourth Generation (4G) cellular networks. They focus on heterogeneous networks where low-power pico cells are deployed within the coverage area of an existing macro network with the aim of offloading traffic from the (potentially congested) macro cells to low-power cells. Firstly, they describe an enhanced inter-cell interference coordination scheme, which is shown to achieve a significant capacity gain in such deployments by leveraging a loose coordination among neighbor base stations. Secondly, they explore how a tighter coordination among base stations can be exploited to further improve the network capacity.