Phan, Khoa T. and Le, Long Bao and Vorobyov, Sergiy A. and Le-Ngoc, Tho (2009) Power Allocation and Admission Control in Multiuser Relay Networks via Convex Programming: Centralized and Distributed Schemes. EURASIP Journal on Wireless Communications and Networking, 2009 . p. 901965. ISSN 1687-1472 http://resolver.caltech.edu/CaltechAUTHORS:20090821-132030481
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The power allocation problem for multiuser wireless networks is considered under the assumption of amplify-and-forward cooperative diversity. Specifically, optimal centralized and distributed power allocation strategies with and without minimum rate requirements are proposed. We make the following contributions. First, power allocation strategies are developed to maximize either (i) the minimum rate among all users or (ii) the weighted-sum of rates. These two strategies achieve different throughput and fairness tradeoffs which can be chosen by network operators depending on their offering services. Second, the distributed implementation of the weighted-sum of rates maximization-based power allocation is proposed. Third, we consider the case when the requesting users have minimum rate requirements, which may not be all satisfied due to the limited-power relays. Consequently, admission control is needed to select the number of users for further optimal power allocation. As such a joint optimal admission control and power allocation problem is combinatorially hard, a heuristic-based suboptimal algorithm with significantly reduced complexity and remarkably good performance is developed. Numerical results demonstrate the effectiveness of the proposed approaches and reveal interesting throughput-fairness tradeoff in resource allocation.
|Additional Information:||Copyright © 2009 Khoa T. Phan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Received 27 November 2008; Accepted 6 March 2009. Recommended by Shuguang Cui. The first author is grateful to D. S. Michalopoulos from the Aristotle University of Thessaloniki, Greece for discussions on the subject. This work was supported by the Natural Sciences and Engineering Research Council (NSERC) of Canada, and the Alberta Ingenuity Foundation, AB, Canada.|
|Official Citation:||Khoa T. Phan, Long Bao Le, Sergiy A. Vorobyov, and Tho Le-Ngoc, “Power Allocation and Admission Control in Multiuser Relay Networks via Convex Programming: Centralized and Distributed Schemes,” EURASIP Journal on Wireless Communications and Networking, vol. 2009, Article ID 901965, 12 pages, 2009. doi:10.1155/2009/901965|
|Usage Policy:||This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.|
|Deposited By:||George Porter|
|Deposited On:||09 Sep 2009 22:04|
|Last Modified:||26 Dec 2012 11:14|
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