New Coordination and Resource Allocation Schemes for Uniform Rate in Femtocell Networks

In this paper, two new coordination and resource allocation schemes based on zero-forcing and maximum ratio transmission pre-coding for densely deployed femtocells connected through a high data rate backhaul are proposed. These schemes aim at offering a uniform rate in a given building, i.e. equal rate simultaneously achieved by all users in that building. New link adaptation and power allocation mechanisms that maximize the uniform rate are proposed. The performance of the proposed schemes is assessed in terms of per user spectral efficiency and backhaul control overhead using system level simulations under realistic propagation models. The study shows that zero-forcing outperforms maximum ratio transmission in terms of spectrum efficiency while being penalizing in terms of backhaul control overhead.