Sum rate maximization in the uplink of multi-cell OFDMA networks

Hina Tabassum, Mohamed-Slim Alouini, Zaher Dawy

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Scopus citations

Abstract

Resource allocation in orthogonal frequency division multiple access (OFDMA) networks plays an imperative role to guarantee the system performance. However, most of the known resource allocation schemes are focused on maximizing the local throughput of each cell, while ignoring the significant effect of inter-cell interference. This paper investigates the problem of resource allocation (i.e., subcarriers and powers) in the uplink of a multi-cell OFDMA network. The problem has a non-convex combinatorial structure and is known to be NP hard. Firstly, we investigate the upper and lower bounds to the average network throughput due to the inherent complexity of implementing the optimal solution. Later, a centralized sub-optimal resource allocation scheme is developed. We further develop less complex centralized and distributed schemes that are well-suited for practical scenarios. The computational complexity of all schemes has been analyzed and the performance is compared through numerical simulations. Simulation results demonstrate that the distributed scheme achieves comparable performance to the centralized resource allocation scheme in various scenarios. © 2011 IEEE.
Original languageEnglish (US)
Title of host publication2011 7th International Wireless Communications and Mobile Computing Conference
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages1152-1157
Number of pages6
ISBN (Print)9781424495399
DOIs
StatePublished - Sep 12 2011

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