An efficient carrier scheduling scheme in cognitive LTE-Advanced system with carrier aggregation

Abstract

Carrier Aggregation (CA) is one of the promising techniques to support the wider bandwidth and fulfil the higher data rate requirement in LTE-Advanced system. Combined with Cognitive Radio (CR), the packet scheduler is more intelligent to assign the radio resources dynamically. To the best of our knowledge, Carrier Scheduling (CS) scheme in the cognitive LTE-A system with CA has not thoroughly been studied yet till now, even the CS scheme based on multi-service. In this paper, we design an efficient multi-user multi-service carrier scheduling scheme in such scenario, named as QoS-based Separated Random User Scheduling (QSRUS), which considers multi-service QoS requirements and fairness among different services simultaneously. From the simulation results, the proposed scheme can achieve remarkable performance improvements in terms of the QoS performance, the mean switching frequency and the fairness when compared with the traditional scheme.