In a companion paper, we characterized the optimal resource allocation in
terms of power control and subcarrier assignment, for a downlink sectorized
OFDMA system. In our model, the network is assumed to be one dimensional for
the sake of analysis. We also assume that a certain part of the available
bandwidth is likely to be reused by different base stations while that the
other part of the bandwidth is shared in an orthogonal way between these base
stations.