Method and apparatus for performing cell level mobility in mobile wireless communication system

    公开(公告)号:US12137385B1

    公开(公告)日:2024-11-05

    申请号:US18672103

    申请日:2024-05-23

    Inventor: Soenghun Kim

    Abstract: A method and apparatus to support cell level mobility is provided. Method for supporting cell level mobility includes receiving a Radio Resource Control (RRC) reconfiguration message, performing a set of operations and performing data transfer in the second cell after performing a specific operation of the set of operations. In case that the RRC reconfiguration message comprises a specific set of parameters, the set of operations comprises starting a timer related to cell level mobility, resetting Medium Access Control (MAC) entity, adjusting uplink transmission timing based on a parameter related to target timing advance, receiving a layer 1 grant based on a first identifier, performing uplink transmission of a specific MAC Protocol Data Unit (PDU) based on the layer 1 grant, receiving downlink assignment and stopping the timer related to cell level mobility.

    METHOD AND APPARATUS FOR PERFORMING RECONFIGURATION AND REPORTING DATA STATUS IN MOBILE WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20240357687A1

    公开(公告)日:2024-10-24

    申请号:US18627466

    申请日:2024-04-05

    Inventor: Soenghun Kim

    CPC classification number: H04W76/20 H04W28/06 H04W80/02

    Abstract: A method and apparatus to support XR services is provided. Method for supporting XR services includes receiving from a base station, a first Radio Resource Control (RRC) message, wherein the first RRC message comprises a one or more sets of logical channel group parameters, triggering a specific Medium Access Control (MAC) CE (Control Element) for a specific logical channel group based on remaining time until discard of one or more PDUs of the specific logical channel group, receiving from the base station a second RRC message, cancelling the specific MAC CE and triggering the specific MAC CE for the specific logical channel group after successful completion of the reconfiguration with synchronization from the first cell to the second cell. The specific MAC CE comprises a field indicating remaining time until discard.

    METHOD AND APPARATUS FOR PDCP SDU DISCARD OPERATION IN MOBILE WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20240357422A1

    公开(公告)日:2024-10-24

    申请号:US18643989

    申请日:2024-04-23

    Inventor: Soenghun Kim

    CPC classification number: H04W28/06 H04W76/20 H04W80/02

    Abstract: A method and apparatus for supporting XR services is provided. The method of a terminal includes receiving from a base station a Radio Resource Control (RRC) message, wherein the RRC message comprises a set of Packet Data Convergence Protocol (PDCP) parameters for a Data Radio Bearer (DRB), establishing a Data Radio Bearer (DRB) based on the set of PDCP parameters, starting a discard timer for a Service Data Unit (SDU) of the DRB and discarding one or more SDUs. In case that the discard timer expires, the terminal performs a first discard operation. In case that successful delivery of the SDU is confirmed by the PDCP status report, the terminal performs a second discard operation.

    Method and apparatus for secondary base station change in mobile wireless communication system

    公开(公告)号:US12120563B2

    公开(公告)日:2024-10-15

    申请号:US17592519

    申请日:2022-02-04

    Applicant: BLACKPIN INC.

    Inventor: Soenghun Kim

    CPC classification number: H04W36/0069 H04W36/0058 H04W36/00835

    Abstract: A method and apparatus for secondary base station change in a mobile communication system with multiple are provided. Method for secondary node change includes transmitting to a target SN a control message requesting conditional secondary node change, receiving from the target SN a Xn message including conditional secondary node change information, transmitting to a terminal LTE DL message for conditional secondary node change, receiving from the terminal a 1st LTE UL message including a transaction identifier, receiving from the terminal a conditional reconfiguration identifier and transmitting to a source SN a control message for data forwarding.

    METHOD AND APPARATUS FOR RANDOM ACCESS IN REPETITION MODE IN WIRELESS MOBILE COMMUNICATION SYSTEM

    公开(公告)号:US20240306191A1

    公开(公告)日:2024-09-12

    申请号:US18653985

    申请日:2024-05-03

    Inventor: Soenghun Kim

    CPC classification number: H04W74/006 H04W48/08 H04W74/0833

    Abstract: A method and apparatus for random access in repetition mode is provided. Method for random access in repetition mode includes receiving first RACH configuration, second RACH configuration and PDCCH configuration, selecting an uplink on which to perform a random access procedure based on the first rsrp threshold in the first RACH configuration, transmitting a preamble in the next available PRACH occasion based on PRACH configuration index, monitoring PDCCH in search space indicated by random access search space during while random access window is running, receiving a random access response message including a preamble identifier related to the preamble transmission and transmitting Msg3 based on the time domain resource allocation field in the uplink grant in the random access response.

    Method and apparatus for determining whether to generate HARQ feedback in non-terrestrial network

    公开(公告)号:US12088403B2

    公开(公告)日:2024-09-10

    申请号:US18599253

    申请日:2024-03-08

    Inventor: Soenghun Kim

    CPC classification number: H04B7/18513 H04L1/1812 H04W76/27

    Abstract: A method and apparatus for operation in NTN is provided. Method for operation in NTN includes receiving SIB1 including the first common offset2 and the first common offset3 and the first reference position in the first NR cell, receiving a first RRC message including a first bitmap and a first DRX configuration in the first NR cell, monitoring PDCCH of the first cell based on the first IE group 1 received in SIB1 and the first IE group 2 received in the first RRC message and the first value determined by the terminal and the first DRX configuration, receiving a second RRC message including a second common offset2 and a second common offset3 and a second reference position and a second DRX configuration and a second bitmap in the first NR cell and monitoring the PDCCH of the second cell based on the second IE group 1 and the second IE group 2 received in the second RRC message and the second value determined by the UE and the second DRX configuration.

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