Method for performing a random access procedure in wireless communication system and a device therefor

    公开(公告)号:US10805960B2

    公开(公告)日:2020-10-13

    申请号:US16192395

    申请日:2018-11-15

    Abstract: The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for performing a random access procedure in wireless communication system, the method comprising: transmitting a random access preamble (RAP) on a physical random access channel (PRACH) resource in a radio frame; calculating a random access-radio network temporary identifier (RA-RNTI) by considering time-frequency resource associated with the PRACH resource and an index of a first radio frame of the PRACH resource; and monitoring a physical downlink control channel (PDCCH) identified by the calculated RA-RNTI for RAR reception during a RAR window.

    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 device for transmitting data unit

    公开(公告)号:US10667165B2

    公开(公告)日:2020-05-26

    申请号:US16429578

    申请日:2019-06-03

    Abstract: In the present invention, if a transmitting device receives an activation command for a packet duplication function of a PDCP entity for a radio bearer (RB), the PDCP entity submits a PDCP protocol data unit (PDU) to each of multiple lower layer entities associated with the PDCP entity, and each of the multiple lower layer entities transmits the PDCP PDU. If the transmitting device receives a deactivation command for the packet duplication function, the PDCP entity submits the PDCP PDU to a single one of the multiple lower layer entities, and the single one of the multiple lower layer entities transmits the PDCP PDU.

    METHOD FOR OPERATING A FAST RANDOM ACCESS PROCEDURE IN A WIRELESS COMMUNICATION SYSTEM AND A DEVICE THEREFOR

    公开(公告)号:US20200092918A1

    公开(公告)日:2020-03-19

    申请号:US16661327

    申请日:2019-10-23

    Abstract: The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for operating fast random access procedure in a wireless communication system, the method comprising: transmitting a RAP including a first RAP ID to an e-NodeB; starting monitoring a Physical Downlink Control Channel PDCCH addressed by RA-RNTI during RAR window; receiving, from the eNB, an indicator including at least one RAP ID, wherein one of the at least one RAP ID matches to the first RAP ID; and stopping monitoring the PDCCH addressed by RA-RNTI upon reception of the indicator.

Patent Agency Ranking