Resource allocation via sum-rate maximization in the uplink of multi-cell OFDMA networks
Type
ArticleKAUST Department
Communication Theory LabComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Physical Science and Engineering (PSE) Division
Date
2011-11-10Preprint Posting Date
2010-10-13Online Publication Date
2011-11-10Print Publication Date
2011-12Permanent link to this record
http://hdl.handle.net/10754/246791
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Show full item recordAbstract
In this paper, we consider maximizing the sum rate in the uplink of a multi-cell orthogonal frequency-division multiple access network. The problem has a non-convex combinatorial structure and is known to be NP-hard. Because of the inherent complexity of implementing the optimal solution, firstly, we derive an upper bound (UB) and a lower bound (LB) to the optimal average network throughput. Moreover, we investigate the performance of a near-optimal single cell resource allocation scheme in the presence of inter-cell interference, which leads to another easily computable LB. We then develop a centralized sub-optimal scheme that is composed of a geometric programming-based power control phase in conjunction with an iterative subcarrier allocation phase. Although the scheme is computationally complex, it provides an effective benchmark for low complexity schemes even without the power control phase. Finally, we propose less complex centralized and distributed schemes that are well suited for practical scenarios. The computational complexity of all schemes is analyzed, and the performance is compared through simulations. Simulation results demonstrate that the proposed low complexity schemes can achieve comparable performance with that of the centralized sub-optimal scheme in various scenarios. Moreover, comparisons with the UB and LB provide insight on the performance gap between the proposed schemes and the optimal solution. Copyright © 2011 John Wiley & Sons, Ltd.Citation
Tabassum H, Dawy Z, Alouini MS (2011) Resource allocation via sum-rate maximization in the uplink of multi-cell OFDMA networks. Wirel Commun Mob Comput 11: 1528-1539. doi:10.1002/wcm.1223.Publisher
WileyDOI
10.1002/wcm.1223arXiv
1010.2692Additional Links
http://doi.wiley.com/10.1002/wcm.1223http://arxiv.org/abs/1010.2692
ae974a485f413a2113503eed53cd6c53
10.1002/wcm.1223
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