A Perceptual Spectrum-Hole Proportional Fairness Scheduling Algorithm Integrated with CR

Abstract

In order to improve the utilization of spectrum resources and solve the problem of unscheduled users in the downlink transmission process in LTE system, we propose a new proportional Fairness scheduling algorithm. The algorithm integrates cognitive radio (CR) technology into proportional Fairness scheduling algorithm, and derives the expression of system throughput under the new algorithm, so that unscheduled users can perceive “spectral-holes” and use the idle spectrum that is not used by the primary user (PU) for data transmission. To achieve maximum resource utilization efficiency. In addition, two secondary user (SU) management schemes for continuing to wait and finding new subcarriers are given, and the delays under the two schemes are calculated. A new decision method is proposed to solve the problem of SU reconstruction. Numerical analysis shows that the new algorithm can ensure the fairness of users, effectively reduce system delay and improve system efficiency.