Performance evaluation of an improved distributed power-control scheme for cellular mobile systems

The distributive power-control (DPC) schemes have been developed to cope with computational complexities arising from CPC schemes. In this paper, a new DPC scheme is suggested to improve the convergence speed and system robustness against carrier-to-interference-ratio (CIR) estimation errors. To expedite the CIR balancing in our DPC scheme, an instability detection rule is used. Numerical results indicate that the proposed algorithm, as compared with Foschini´s DPC (FDPC) and three other newer methods, achieves performance improvements in terms of outage probability as well as algorithm´s convergence speed. More specifically, by appropriate selection of some parameters, the algorithm speed increases from about 90 iterations in FDPC to 9 iterations in the proposed algorithm. We use a detection rule to expedite the cell-removal process. The system robustness against CIR estimation errors is also explored.