| 摘要 |
Provided is a data delivery method performed in a receiving apparatus of a mobile communication system. Protocol data units (PDUs) are received, and service data units (SDUs) are extracted from the received PDUs and delivered to an upper layer in real time. Alternatively, it is determined whether a PDU gap, in which PDUs are not received in sequence, has occurred on the basis of sequence numbers (SNs) of received PDUs, a reordering timer (t_Reordering) is started when a PDU gap has occurred, and at least one SDU is extracted from at least one PDU, which have been received already, and delivered to an upper layer of radio link control (RLC) when the reordering timer expires and no PDU corresponding to the PDU gap is received.
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