METHOD AND APPARATUS FOR TRANSMITTING DATA UNIT IN RRC INACTIVE STATE BY USER EQUIPMENT IN WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20220095391A1

    公开(公告)日:2022-03-24

    申请号:US17469341

    申请日:2021-09-08

    Abstract: A method for performing data transmission by a user equipment (UE) in a wireless communication system is disclosed. The method comprises steps of receiving a message indicating a change of a Radio resource control (RRC) state from a RRC CONNECTED state to a RRC INACTIVE state, wherein the message includes information related to a configured grant (CG) and a threshold; if a time gap between a current time and an uplink grant occasion associated with the configured grant is larger than or equal to the threshold, triggering a random access (RA) procedure for the data transmission; and performing the data transmission based on the RA procedure in the RRC INACTIVE state, wherein, if the time gap is smaller than the threshold, the data transmission is performed based on the uplink grant occasion associated with the configured grant.

    METHOD FOR MANAGING DUPLICATION MODES BY USER EQUIPMENT IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR

    公开(公告)号:US20200100235A1

    公开(公告)日:2020-03-26

    申请号:US16547298

    申请日:2019-08-21

    Abstract: A method for processing a data unit by a Packet Data Convergence Protocol (PDCP) entity of a user equipment includes configuring three or more Radio Link Control (RLC) entities with the PDCP entity; activating a first duplication mode for first and second RLC entities among the three or more RLC entities; providing the data unit to the first and second RLC entities by duplicating the data unit; receiving a duplication mode change command from a network; changing the first duplication mode to a second duplication mode for the first RLC entity and a third RLC entity; and providing the data unit to the first and third RLC entities by duplicating the data unit, wherein the first and second RLC entities is configured with a first Media Access Control (MAC) entity, and wherein the third RLC entity is configured with a second MAC entity.

    METHOD FOR HANDLING STATE VARIABLES OF A PDCP ENTITY IN WIRELESS COMMUNICATION SYSTEM AND A DEVICE THEREFOR

    公开(公告)号:US20190319893A1

    公开(公告)日:2019-10-17

    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 FOR HANDLING STATE VARIABLES OF A PDCP ENTITY IN WIRELESS COMMUNICATION SYSTEM AND A DEVICE THEREFOR

    公开(公告)号:US20190044880A1

    公开(公告)日:2019-02-07

    申请号:US16057104

    申请日:2018-08-07

    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.

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