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The downlink capacity of cellular networks is known to be strongly limited by inter-cell interference. In order to mitigate this interference, a number of frequency reuse schemes have recently been proposed. In this paper, we compare the potential capacity gains of these schemes accounting for the random nature of traffic.
We describe an algorithm for sub-carrier and power allocation that achieves out-of-cell interference avoidance through dynamic fractional frequency reuse (FFR) in downlink of cellular systems based on orthogonal frequency division multiple access (OFDMA). The focus in on the constant-bit-rate (CBR) traffic type flows (e.g., VoIP). Our approach is based on the continuous "selfish" optimization...
The focus of this paper is the improvement of the average sum rate of an orthogonal frequency-division multiple-access (OFDMA) system in uplink by exploiting multiple users' tap correlation information. We propose two statistical opportunistic scheduling schemes that schedule users based on the average subcarrier gains. We characterize the optimality of these schemes and compare their simulation results...
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