Wireless systems: Economic model-based radio resource management with QoS guarantees in the CDMA uplink

Abstract

In this paper, radio resource management based on economic model is investigated in detail in the CDMA uplink. A novel economic model is proposed to allocate the radio resources with QoS guarantees in an efficient manner. Firstly, we deduce the resources usage constraint that takes the multi-cell interference power into account in the CDMA uplink. Then a novel utility function is designed to evaluate the total network revenue from the limited radio resources, it considers the factors of both network resources and user preferences such as data rate or signal quality. Under the resources usage constraint of considering multi-cell interference, the radio resource allocation is formulated into an optimisation problem with the objective function of maximising the total network revenue, which is solved to get the optimal transmission rate for each user while guaranteeing the level of signal quality. Numerical results showthat approximately more than 20% number of users and another 5% network revenue are achieved according to our resource allocation algorithm compared with traditional ones; meanwhile, signal quality of each mobile user is guaranteed effectively. Copyright © 2009 John Wiley & Sons, Ltd.