US 12,273,928 B2
Method and device for random access
Bin Ren, Beijing (CN); Deshan Miao, Beijing (CN); Shaohui Sun, Beijing (CN); and Shaoli Kang, Beijing (CN)
Assigned to Datang Mobile Communications Equipment Co., Ltd., Beijing (CN)
Appl. No. 17/430,538
Filed by DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD., Beijing (CN)
PCT Filed Dec. 19, 2019, PCT No. PCT/CN2019/126707
§ 371(c)(1), (2) Date Aug. 12, 2021,
PCT Pub. No. WO2020/164309, PCT Pub. Date Aug. 20, 2020.
Claims priority of application No. 201910115043.7 (CN), filed on Feb. 14, 2019.
Prior Publication US 2022/0132593 A1, Apr. 28, 2022
Int. Cl. H04W 74/0833 (2024.01); H04W 56/00 (2009.01); H04W 72/0446 (2023.01); H04W 72/0453 (2023.01); H04W 74/08 (2009.01); H04W 84/06 (2009.01)
CPC H04W 74/0841 (2013.01) [H04W 56/001 (2013.01); H04W 56/0045 (2013.01); H04W 56/006 (2013.01); H04W 72/0446 (2013.01); H04W 72/0453 (2013.01); H04W 74/0866 (2013.01); H04W 84/06 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for a terminal to perform random access, comprising: receiving and obtaining a related parameter in a configuration message, wherein the related parameter comprises cell public delay information, wherein the cell public delay information is public transmission delay information of a beam area covered by a Non-Terrestrial Networks system, wherein the configuration message comprises a PRACH Preamble format;
generating a Physical Random Access CHannel random access Preamble, PRACH Preamble, sequence, and determining an uplink transmission timing position according to the cell public delay information;
sending the PRACH Preamble sequence on a time-frequency resource corresponding to the uplink transmission timing position;
detecting a feedback Random Access Response, RAR, message within an RAR time window, wherein the RAR message comprises an uplink timing advance adjustment and an uplink grant, and the RAR time window starts from the configuration message receiving position:
achieving uplink synchronization according to the feedback RAR message, and sending a Radio Resource Control, RRC, message; and receiving and decoding a feedback contention resolution message.