Research On Resource Scheduling Algorithm Based On Carrier Aggregation In LTE/LTE-A System

With the rapid development of modern wireless communication technology,LTE-Advanced system has been more extensively studied,The demand for bandwidth of LTE-advance system is becoming higher.As a key technology of the system,carrier aggregation technology can put some members of carrier aggregation which are in different bands together,it can increase the transmission bandwidth and improve data transfer rate of the system.Since carrier aggregation has been the introduced,some existing scheduling algorithms used in single-carrier system is not suitable for LTE-A.So looking for an effective resource scheduling algorithm in the LTE-A system is a very important condition.This paper studies scheduling Algorithm for carrier Aggregation,the article introduces the theory of carrier aggregation firstly,summarizes the study and the type of carrier aggregation Carrier aggregation at the present stage.Then the article describes the LTE resource scheduling theory three classical scheduling algorithms.Because the imbalance between the scheduling algorithms and the application,the PF scheduling algorithm is proposed in this paper for edge user priority,some of the component carriers allocate the resource blocks to the users at a certain probability edge a. This ratio is1-a for center users.The improved algorithm can improve the throughput for the edge user and improve the fairness among users.This paper improves the PF algorithm in the case of LTE user and LTE-A user exist in this system.It improve throughput and fairness of the entire system and ensure an optimal system performance.