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

    摘要: 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

    IPC分类号: H04W56/00 H04W76/20 H04W76/30

    摘要: 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.

    METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DEMODULATION REFERENCE SIGNAL

    公开(公告)号:US20240154846A1

    公开(公告)日:2024-05-09

    申请号:US18416138

    申请日:2024-01-18

    发明人: Sung Jun YOON

    IPC分类号: H04L27/26 H04L5/00

    摘要: Methods, apparatuses, and systems described herein generally relate to a reference signal generation and mapping. For example, a method comprises determining a first set of antenna ports for a demodulation reference signal (DM-RS) transmission; determining, based on the first set, a frequency index associated with four adjacent resource elements, wherein the four adjacent resource elements correspond to two adjacent symbols in a time axis and to two adjacent subcarriers in a frequency axis; generating, based on a first orthogonal cover code and a second orthogonal cover code, a DM-RS associated with the first set of antenna ports; and transmitting, via a mapping to the four adjacent resource elements, the DM-RS associated with the first set of antenna ports.