FIELD: information technology.
SUBSTANCE: systems and methods 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 the index of the last SDU received in-order before communication handover to the target base station. Additionally, SDUs received subsequent to one or more non-acknowledged SDUs can be forwarded to the target base station. Using this information, the target base station can determine one or more SDUs the mobile device is preparing to re-transmit and can wait for that SDU before processing subsequently received SDUs. Also, a timer can be used to end the waiting period for the SDU.
EFFECT: high accuracy of transmitting service data blocks.
42 cl, 11 dwg
