| 摘要 |
A method for handling discarding of a sequence of service data units in a communications system is disclosed. The sequence of service data units includes at least a last discarded service data unit (SDU). When a protocol data unit (PDU) containing a length indicator of the last discarded SDU contains no new SDUs, the method includes creating a move receiving window super field (MRW SUFI), setting a N<SUB>LENGTH </SUB>field of the MRW SUFI to 0, setting a last sequence number move receiving window field (SN_MRW<SUB>LENGTH</SUB>) to a sum of one plus a sequence number (SN) of the PDU containing the length indicator of the last discarded SDU, and issuing the MRW SUFI.
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