We consider the problem of distributed inter-cell interference mitigation in multi-carrier wireless cellular networks. Assuming that neighboring base stations can be coordinated, we optimize the network weighted sum-rate via binary power control. The weights account for different priorities of mobile terminals, and are periodically updated to maintain proportional fairness. We design two distributed algorithms for inter-cell coordination which converge to a state where no base station can individually change its activity status to improve the weighted sum-rate of the network. Numerical results show that these algorithms achieve a significant throughput gain, especially for cell-edge users (up to 20%), compared to a conventional proportional fair scheduling algorithm without inter-cell coordination. Remarkably, the proposed distributed algorithms require limited feedback and achieve most of the throughput gain within few iterations.

Distributed inter-cell interference mitigation in OFDMA wireless data networks

VENTURINO, Luca;
2008

Abstract

We consider the problem of distributed inter-cell interference mitigation in multi-carrier wireless cellular networks. Assuming that neighboring base stations can be coordinated, we optimize the network weighted sum-rate via binary power control. The weights account for different priorities of mobile terminals, and are periodically updated to maintain proportional fairness. We design two distributed algorithms for inter-cell coordination which converge to a state where no base station can individually change its activity status to improve the weighted sum-rate of the network. Numerical results show that these algorithms achieve a significant throughput gain, especially for cell-edge users (up to 20%), compared to a conventional proportional fair scheduling algorithm without inter-cell coordination. Remarkably, the proposed distributed algorithms require limited feedback and achieve most of the throughput gain within few iterations.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11580/5143
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