METHOD, SYSTEM AND DEVICE FOR PROVIDING FLOW CONTROL IN A SPLIT BEARER ENVIRONMENT

摘要

A method of enhanced flow-control based on TS 36.425 (split bearer environment) is presented where the feedback mechanism is extended by including an estimated queue delay in the SeNb and an estimated Internode interface (X2 backhaul) is included. The objective is to empty both queues at substantially the same moment. Due to delays in the internode interface or SeNB queue, this objective could be endangered when TS 36.425 is applied as such. The fed back delays are applied in determining the queue in the MeNB in a portion that represents the amount of PDUs that would not be submitted and acknowledged in time if these PDUs were forwarded to the SeNB. By partitioning the MeNB queue in parts that are, and are not allowed to be forwarded to the SeNB, the objective is achieved.