Performance evaluation of an improved distributed power-control scheme for cellular mobile systems
Mostafa Rezayi, Hamid Farrokhi · 2010
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.