Apparatus and method for performing random access in wireless communication system

    公开(公告)号:US12232180B2

    公开(公告)日:2025-02-18

    申请号:US17875408

    申请日:2022-07-28

    Abstract: Provided is a method and apparatus for performing a random access procedure. A wireless device may transmit a random access preamble and may monitor for a random access response. The wireless device may determine to transmit a second random access preamble or to transmit uplink data responsive to the random access response. A time for preparing the second random access preamble may be determined based on a subcarrier spacing associated with the random access preamble or a subcarrier spacing associated a downlink channel associated with the random access response. A time for preparing the uplink data may be determined based on a subcarrier spacing associated with the uplink data or a subcarrier spacing associated a downlink channel associated with the random access response.

    METHOD AND APPARATUS FOR WIDEBAND OPERATION IN NR COMMUNICATION SYSTEM

    公开(公告)号:US20240430149A1

    公开(公告)日:2024-12-26

    申请号:US18828730

    申请日:2024-09-09

    Inventor: Dong Hyun PARK

    Abstract: Provided is a method and apparatus for using an offset between a synchronization signal block and a resource block grid. The method may include receiving, by a user device, a synchronization signal (SS) block comprising a synchronization signal and a physical broadcast channel (PBCH), determining, from the PBCH, a value of a subcarrier offset between the SS block and an RB grid, determining, based on the value of the subcarrier offset and a frequency location of the SS block, the RB grid, and decoding, based on the determined RB grid, one or more of a reference signal, a control channel, or a data channel.

    Method for performing HARQ feedback procedure

    公开(公告)号:US12149479B2

    公开(公告)日:2024-11-19

    申请号:US17246713

    申请日:2021-05-02

    Inventor: Dong Hyun Park

    Abstract: A method of performing, by a terminal, a Hybrid Automatic Repeat and Request (HARQ) feedback procedure in a new radio (NR) vehicle-to-everything (V2X) system may include receiving sidelink (SL) data from a transmitting (Tx) terminal, determining a PSFCH resource including feedback information about the received sidelink data, and transmitting a PSFCH to the Tx terminal through the determined PSFCH resource.

    Method and apparatus for indication of synchronization signal block

    公开(公告)号:US12075376B2

    公开(公告)日:2024-08-27

    申请号:US18326223

    申请日:2023-05-31

    CPC classification number: H04W56/001 H04L1/1614 H04W72/30

    Abstract: Disclosed is a method and apparatus for generating information indicating a synchronization signal (SS) block. A method comprises: determining a frequency resource associated with a wireless device; determining, by a base station and based on the determined frequency resource, whether to add or omit a first bitmap indicating a plurality of groups in which at least one synchronization signal (SS) block is transmitted: generating, based on the determining to add the first bitmap, system information comprising a parameter comprising: the first bitmap; and a second bitmap indicating a position of one or more transmission SS blocks in each of the plurality of groups; and transmitting, based on the position, the one or more transmission SS blocks each comprising a Physical Broadcast Channel (PBCH) and a synchronization signal.

    METHOD AND DEVICE FOR UPLINK SYNCHRONIZATION OF TERMINAL IN INACTIVE STATE IN WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20240224209A1

    公开(公告)日:2024-07-04

    申请号:US17909460

    申请日:2021-03-08

    CPC classification number: H04W56/0045 H04W56/0015 H04W76/20 H04W76/30

    Abstract: The present disclosure relates to an uplink synchronization method and apparatus for a terminal in an inactive state in a wireless communication system. An uplink synchronization method of a terminal in an inactive state in a wireless communication system according to an embodiment of the present disclosure includes: receiving periodic uplink transmission resource configuration information from a base station; starting a time alignment timer (TAT) by receiving a timing advance command (TAC) from the base station; Transitioning to an inactive state by receiving a RRC (Radio Resource Control) release message including a suspend configuration from the base station; In the inactive state, when a predetermined trigger condition is satisfied, performing uplink transmission to the base station based on the periodic uplink transmission resource configuration information, wherein the predetermined trigger condition is the elapsed time since the TAT started. At least one of a time-related condition, a condition related to the time remaining until the TAT expires, a condition related to the expiration of the periodic notification area update timer, or a condition related to reception of a timing advance (TA) update command from the base station and the uplink transmission includes at least one of small data and dummy data; and receiving an additional TAC from the base station and restarting the TAT.

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