Method and apparatus for transmitting uplink feedback information unit based on PDCP duplication state in wireless communication system

    公开(公告)号:US11595951B2

    公开(公告)日:2023-02-28

    申请号:US17356385

    申请日:2021-06-23

    Inventor: Geumsan Jo

    Abstract: The present invention relates to a method of transmitting a status report by a user equipment (UE) in a wireless communication system. Especially, the method includes the steps of receiving information about whether a Packet Data Convergence Protocol (PDCP) duplication for downlink is activated or not; receiving at least one data unit from a network; determining whether the status report related to the at least one data unit is triggered or not; based on whether the PDCP duplication for the downlink is activated or not; and transmitting the triggered status report related to the at least one data unit, wherein, based on the PDCP duplication for the downlink being activated, the status report related to the at least one data unit is not triggered.

    Method for handling state variables of a PDCP entity in wireless communication system and a device therefor

    公开(公告)号:US10680967B2

    公开(公告)日:2020-06-09

    申请号:US16453187

    申请日:2019-06-26

    Abstract: The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for handling state variables of a PDCP entity in wireless communication system, the method comprising: delivering an PDCP SDU associated with a first COUNT to upper layer and starting, by the PDCP entity, a reordering timer, when an out-of-order PDCP PDU with the first COUNT value is received from lower layer; updating a value of a first state variable to the first COUNT value +1, when the reordering timer starts; and when the reordering timer expires, updating, by the PDCP entity, a value of a second state variable based on a second COUNT value of a first PDCP SDU which has not been delivered to upper layers, among PDCP SDUs with COUNT values which are equal to or larger than the first state variable.

    METHOD AND APPARATUS FOR PERFORMING INTEGRITY PROTECTION AND INTEGRITY VERIFICATION IN WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20230188996A1

    公开(公告)日:2023-06-15

    申请号:US17916734

    申请日:2021-01-26

    CPC classification number: H04W12/106

    Abstract: The present invention relates to a method of transmitting a Packet Data Convergence Protocol (PDCP) Protocol Data Unit (PDU) by a transmitter in a wireless communication system. Especially, the method includes the steps of configuring an offset and a specific value for integrity protection; receiving a PDCP Service Data Unit (SDU) including a plurality of octets from an upper layer; generating a Message Authentication Code - Integrity (MAC-I) by performing the integrity protection from a first octet corresponding to the offset among the plurality of octets to a second octet corresponding to the offset plus the specific value among the plurality of octets; and transmitting the PDCP PDU including the PDCP SDU and the MAC-I to the receiver.

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