Stabilizing anti-windup controllers for power allocation in cellular networks

Recently, passivity-based techniques to control the transmit power of mobile nodes have been proposed to ensure the input-output stability of cellular CDMA networks. An inherent assumption in these solutions is that the transmit power synthesized by the controller of choice does not exceed an upper bound p_max, which has not been characterized. In practice, an upper bound p_max is invariably imposed on the instantaneous transmit power of the mobile user and may lead to windup in the cellular network. We propose an antiwindup mechanism.