Coordinate ascent based resource allocation algorithm for maximizing WSMR in downlink cellular OFDMA systems

Wang, Tao;Vandendorpe, Luc
(2010) 2010 IEEE 21st International Symposium on Personal, Indoor and MobileRadio Communications Workshops (PIMRC Workshops) — Location: Turkey (26.September.2010)

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This paper considers the downlink of a cellular orthogonal frequency division multi-access (OFDMA) system, in which multiple base stations (BSs) are coordinated by a centralized resource allocation algorithm. We address the problem of maximizing the weighted sum of the minimal user rates (WSMR) of coordinated cells subject to a total power constraint at each BS. In particular, the solution of this problem corresponds to a resource allocation that guarantees similar rates to users in each cell. We propose a coordinate ascent based iterative algorithm which alternatively updates the power allocation by solving a successive set of convex optimization problems with geometric programming, as well as optimizes the subcarrier allocation by solving a linear program for each cell. We illustrate the effectiveness of the algorithm by numerical experiments.
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Wang, T., & Vandendorpe, L. (2010). Coordinate ascent based resource allocation algorithm for maximizing WSMR in downlink cellular OFDMA systems. 2010 IEEE 21st International Symposium on Personal, Indoor and MobileRadio Communications Workshops (PIMRC Workshops), 381-386. https://doi.org/10.1109/PIMRCW.2010.5670399