Constrained power control in cellular radio systems

High system capacities can be achieved by controlling the transmitter power in multiuser radio systems. Power control with no constraint on the maximum power level has been studied extensively in earlier work. Transmitter power is at a premium in radio systems such as cellular systems and PCS. There is a limit on the maximum transmitter power especially at the terminals (e.g. mobile units and handsets) since the power comes from a battery. In this paper we study power control that maximizes the minimum carrier to interference ratio (CIR), with a constraint on the maximum power. The optimal power vector solution lies on the boundary of the constrained power vector set and achieves a balance in the CIR's. Results indicate that the constraints do not induce any stability problems. A distributed scheme with favourable convergence properties and close to optimum performance is presented. Simulation results show that the algorithm tries to maximize the number of terminals served with CIR greater than or equal to the target CIR, while conserving power.<<ETX>>

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

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

[3]  Roy D. Yates,et al.  Integrated power control and base station assignment , 1995 .

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

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

[6]  Jens Zander,et al.  Transmitter Power Control for Co-Channel Interference Management in Cellular Radio Systems - An Overview and some Recent Results , 1993 .

[7]  J. F. Whitehead Signal-level-based dynamic power control for co-channel interference management , 1993, IEEE 43rd Vehicular Technology Conference.

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

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

[10]  John N. Tsitsiklis,et al.  Parallel and distributed computation , 1989 .

[11]  Jens Zander,et al.  Comment on "Performance of optimum transmitter power control in cellular radio systems" , 1994 .

[12]  R.W. Nettleton,et al.  Power control for a spread spectrum cellular mobile radio system , 1983, 33rd IEEE Vehicular Technology Conference.

[13]  M. Sakamoto,et al.  Reduction of cochannel interference in cellular systems by intra-zone channel reassignment and adaptive transmitter power control , 1988, 38th IEEE Vehicular Technology Conference.

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