Minimizing queueing delay through CDMA uplink power control

Abstract

We propose a simple distributed uplink power control scheme based on the Foschini-Miljanic algorithm but driven by the queue sizes of each mobile station. The resulting data rates are proportional to the queue backlog of each mobile, such that the total power consumption is equal to a target value. Using analysis we establish convergence and characterize the equilibrium, and use simulations to study the performance of the proposed scheme. It is exhibited that the algorithm is capable of utilizing any idle capacity in the system thereby obtaining considerable reductions in average queueing delay.