A study on the distributed power control for cellular mobile systems

Several distributed power control (DPC) algorithms that can achieve carrier to interference ratio (CIR) balancing with probability one have been proposed for cellular mobile systems. We study the effect of CIR measurement error and power level quantization on the outage probability for various DPC algorithms. Among the investigated DPC algorithms, the CDPC-II algorithm has the best performance under the conditions of both with and without CIR measurement error, but the convergence property of the CDPC-II algorithm remains unproved. In addition, the FDPC-II scheme has a fully distributed property and the degradation in terms of the outage probability is negligible as long as the dynamic range is greater than 20 dB. Moreover, with the FDPC-II scheme the effect of both the CIR measurement error and the power level quantization on the outage probability is smaller than with the FDPC-I scheme. The FDPC-II scheme, therefore, is a good choice for cellular mobile systems