Carrier Aggregation's Cross-carrier Scheduling Algorithm Research On LTE-Advanced System

Carrier Aggregation(CA)is one of key technologies on LTE-Advanced system.In order to meeting the single-user peak rate and system capacity requirements,one of the most direct ways is to increase the transmission bandwidth of the system.Therefore,the LTE-Advanced system introduce one technology to increase the transmission bandwidth LTE-Advanced system,the technology is called Carrier Aggregation technology.With Carrier Aggregation technology and Multiple-Input Multiple-Output technology gradually introduced,the peak rate can be raised to 1Gbps.Carrier aggregation can support continuous or non-continuous carrier aggregation,it is to gather multiple carriers as the use of a wider frequency band,achieve discrete frequency bands transmission simultaneously through dealing with unified baseband.To achieve a better user's experience,a user is scheduled on multiple carriers.Balancing resource allocation on different carriers is the key problem which is focused on to solve.As different carrier aggregation scenarios,scheduling methods for user resources are proposed for different scenarios in this paper.For Release 10 users of the Forth Generation,the original joint scheduling algorithm improve to carry on packet scheduling and get a better balance between the throughput and fairness.At the same time we take into account Release 8 of the Long Term Evolution and Release 10 of the Forth Generation user's coexistence,propose a scheduling algorithm for user resources,and solve the fairness problem of different users.In a network deployment,when network users' frequency usage reaches saturation,edge users have bad experience,about this problem,paper proposes the corresponding algorithm.In carrier aggregation,allocation and scheduling for carriers are the focus of paper's research,and test carrier scheduling.The paper also study resource utilization of Release 8 and 4G LTE users Release 10 users when perform bursty traffic under the carrier aggregation scenarios,and put some algorithms' research in actual testing in carrier aggregation scenarios to verify the advantages of the algorithms.