Optimizing in-order delivery of data packets during wireless communication handover

摘要

Systems and methodologies are described that facilitate processing service data units (SDU) in-order during communication handover in wireless networks. In particular, for mobile devices using re-transmission schemes, SDUs can be processed in-order by indicating to a target base station an index of a last SDU received in-order before handing off communication to the target base station. Additionally, SDUs received subsequent to one or more non-acknowledged SDUs can be forwarded to the target base station. Utilizing this information, the target base station can determine one or more SDUs the mobile device is preparing to re-transmit and can wait for this SDU before processing subsequently received SDUs. Also, a timer can be utilized to end a waiting period for the SDU.

主权项

1. A method of delivering data packets according to sequence numbers during handover at a target base station in wireless communication networks, comprising:
receiving, at the target base station and from a source base station, signaling related to a first missing service data unit (SDU) following a last SDU received in-order at the source base station from a related mobile device; obtaining, at the target base station and from the source base station, one or more subsequent SDUs received at the source base station; determining, at the target base station, one or more missing SDUs numbered between an index of the last SDU received in-order and a highest index of the one or more subsequent SDUs; and informing the related mobile device, by the target base station, of one or more missing SDUs based on a result of the determining.