A PI-power control algorithm for cellular radio systems

Along with "distributiveness", convergence speed of power control is one of the most important criteria by which we can determine the practical applicability of a given power control algorithm. A good power control algorithm should quickly and distributively converge to the state where the system supports as many users as possible. This paper proposes a fast and distributed power control algorithm based on the well-known PI-controller. As in the paper by Foschini and Miljanic (see IEEE Trans. Vehicular Technol., vol.42, no.4, p.641-6, Nov. 1993) we start with a differential equation form of the controller and analyze its convergence properties in the case of feasible systems. The actual power control algorithm is then derived by discretization of the continuous time version. Using the distributed constrained power control (DCPC) as a reference algorithm, we carried out computational experiments on a CDMA system. The results indicate that our algorithm significantly enhances the convergence speed of power control.

[1]  A. Viterbi.  CDMA: Principles of Spread Spectrum Communication , 1995 .

[2]  Jens Zander,et al.  Centralized power control in cellular radio systems , 1993 .

[3]  Debasis Mitra,et al.  An Asynchronous Distributed Algorithm for Power Control in Cellular Radio Systems , 1994 .

[4]  Roy D. Yates,et al.  Rate of convergence for minimum power assignment algorithms in cellular radio systems , 1998, Wirel. Networks.

[5]  Jens Zander,et al.  Distributed cochannel interference control in cellular radio systems , 1992 .

[6]  Stefan Oestreich.  Power control in mobile radio systems with interrupted transmission , 2000 .

[7]  David J. Goodman,et al.  Distributed power control in cellular radio systems , 1994, IEEE Trans. Commun..

[8]  Fredrik Gustafsson,et al.  Power Control in Cellular Radio Systems , 2000 .

[9]  Gerard J. Foschini,et al.  A simple distributed autonomous power control algorithm and its convergence , 1993 .

[10]  Jens Zander,et al.  Performance of optimum transmitter power control in cellular radio systems , 1992 .

[11]  J. Gillis,et al.  Matrix Iterative Analysis , 1961 .

[12]  Roy D. Yates,et al.  Constrained power control , 1994, Wirel. Pers. Commun..

[13]  Jonas Blom.  Power Control in Cellular Radio Systems , 1998 .

[14]  Roy D. Yates,et al.  A Framework for Uplink Power Control in Cellular Radio Systems , 1995, IEEE J. Sel. Areas Commun..

[15]  Seong-Lyun Kim,et al.  Second-order power control with asymptotically fast convergence , 2000, IEEE Journal on Selected Areas in Communications.