A power efficient algorithm for power/rate control in wireless transmission

We propose the Lagrangian relaxation power and rate control (LRPRC) algorithm, which achieves relatively higher average system throughput, but with substantially lower power consumption and comparable outage probability when compared to two previously published schemes in S. L. Kim, et al. (Sept. 1999). We find that these are achieved by lowering the data rates of users with unfavorable channel conditions, instead of driving their powers to the maximum as in S. L. Kim, et al. (Sept. 1999). We conclude that if power efficiency is a major concern, the LRPRC is a relatively strong alternative among the three schemes, for light to heavy traffic load conditions.