USER EQUIPMENT AND DOWNWARD DATA RECEIVING METHOD OF USER EQUIPMENT.

摘要

A user equipment (UE) and a downward data receiving method of a user equipment are provided to avoid the occurrence of mistakes when UE receives the downward data. The method includes the following steps: during the reestablishment, in the process of transmitting Service Data Units (SDUs) to a Packet Data Convergence Protocol (PDCP) entity from a Radio Link Control (RLC) entity in UE, if the PDCP entity judges that the PDCP Sequence Number (SN) of the received PDCP Protocol Data Unit (PDU) including SDUs satisfies the following report condition, this PDCP PDU is received and the SDU included in this PDCP PDU is submitted to an upper layer entity: PDCP SN=(Last_Submitted_PDCP_RX_SN+1)%(Maximum_PDCP_SN+1).