Power control for multicell CDMA wireless networks: A team optimization approach

We study power control in multicell CDMA wireless networks as a team optimization problem where each mobile attains at the minimum its individual fixed target SIR level and beyond that optimizes its transmission power level according to its individual preferences. We derive conditions under which th...

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Bibliographic Details
Published in:Wireless networks 2008-10, Vol.14 (5), p.647-657
Main Authors: Alpcan, Tansu, Fan, Xingzhe, Başar, Tamer, Arcak, Murat, Wen, John T.
Format: Article
Language:English
Subjects:
Code Division Multiple Access
Communications Engineering
Computer Communication Networks
Control algorithms
Electrical Engineering
Engineering
IT in Business
Laboratories
Lagrange multiplier
Mathematical models
Networks
Optimization
Quality of service
Statistical analysis
Studies
Teamwork
Wireless networks
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Summary:We study power control in multicell CDMA wireless networks as a team optimization problem where each mobile attains at the minimum its individual fixed target SIR level and beyond that optimizes its transmission power level according to its individual preferences. We derive conditions under which the power control problem admits a unique feasible solution. Using a Lagrangian relaxation approach similar to [10] we obtain two decentralized dynamic power control algorithms: primal and dual power update, and establish their global stability utilizing both classical Lyapunov theory and the passivity framework [14]. We show that the robustness results of passivity studies [8, 9] as well as most of the stability and robustness analyses in the literature [10] are applicable to the power control problem considered. In addition, some of the basic principles of call admission control are investigated from the perspective of the model adopted in this paper. We illustrate the proposed power control schemes through simulations.
ISSN:1022-0038
1572-8196
DOI:10.1007/s11276-006-0006-5