Article

Wireless Networks

, Volume 14, Issue 5, pp 647-657

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

  • Tansu AlpcanAffiliated withDeutsche Telekom Laboratories, Technische Universität Berlin Ernst-Reuter-Platz 7 Email author 
  • , Xingzhe FanAffiliated withRensselaer Polytechnic Institute, Electrical, Computer, and Systems Eng. Dept.
  • , Tamer BaşarAffiliated withUniversity of Illinois at Urbana-Champaign, Coordinated Science Laboratory
  • , Murat ArcakAffiliated withRensselaer Polytechnic Institute, Electrical, Computer, and Systems Eng. Dept.
  • , John T. WenAffiliated withRensselaer Polytechnic Institute, Electrical, Computer, and Systems Eng. Dept.

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Abstract

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.

Keywords

Power control CDMA wireless networks Team optimization Passivity Robustness Admission control