A QoS-guaranteed radio resource scheduling in multi-user multi-service LTE-A systems with carrier aggregation

Carrier aggregation technology is introduced to improve the throughput by simultaneously data transmission on multiple component carriers (CCs) in the long term evolution advanced (LTE-A) system. Although many studies have been proposed to improve the throughput of single service in LTE-A system with CA configuration, challenging issues are unsolved for the multi-user multi-service network on the resource management algorithms, such as the CC selection and the resource block (RB) allocation, in order to satisfy various requirements on quality of service (QoS) in different services. To solve these problems, the resource scheduling problem is formulated by considering service types, channel quality, buffer size and fairness factors and a novel approach is proposed to satisfy the QoS requirement of different services by maximizing the system utility. Simulation results show that the proposed scheme can significantly improve user's experience on the voice over LTE (VoLTE) service compared with existing schemes.