A Resource Scheduling Algorithm Based on User Grouping for LTE-Advanced System with Carrier Aggregation

This paper focuses on the resource scheduling of LTE-Advanced system with carrier aggregation. With different fading characters, the aggregated carriers have different coverage between each other. Consequently, the carrier aggregation causes that the number of carriers which users can be scheduled on is various. The allocation fairness can not be achieved with the original proportional fair (PF) scheduling algorithm, since the PF assumes that all users can be scheduled on the entire spectrum resources. Thus, a PF scheduling algorithm based on user grouping (UG-PF) is proposed. The users are partitioned into specific groups according to the number of carriers that they can be scheduled on. Furthermore, a modified scheduling policy is obtained based on the average channel access probability of different user groups. Simulation results demonstrate that the UG-PF algorithm can accomplish better fairness among users compared with the original PF algorithm.