US 12,149,396 B2
Beam establishment method and apparatus
Jianwei Zhou, Hangzhou (CN); Chenlei Xu, Hangzhou (CN); Hejia Luo, Hangzhou (CN); and Xiaolu Wang, Hangzhou (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on May 6, 2022, as Appl. No. 17/738,863.
Application 17/738,863 is a continuation of application No. PCT/CN2020/124271, filed on Oct. 28, 2020.
Claims priority of application No. 201911089943.5 (CN), filed on Nov. 8, 2019.
Prior Publication US 2022/0263701 A1, Aug. 18, 2022
Int. Cl. H04L 27/26 (2006.01); H04W 56/00 (2009.01); H04W 74/0833 (2024.01)
CPC H04L 27/2678 (2013.01) [H04W 56/001 (2013.01); H04W 74/0833 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A beam establishment method, wherein the method comprises:
obtaining, by a terminal apparatus, synchronization signal and physical broadcast channel (PBCH) blocks (SSBs) in a plurality of beams, wherein each of the SSBs comprises an SSB index;
determining, by the terminal apparatus, a target beam in the plurality of beams based on an association relationship between the SSB index and a first random access preamble, wherein the first random access preamble is determined based on at least one of a cyclic shift and an order of symbols, the symbols are symbols of a sequence part in the first random access preamble, and the sequence part comprises at least two types of symbols;
and sending, by the terminal apparatus, the first random access preamble by using the target beam to initiate a random access request,
wherein the cyclic shift is obtained through a calculation based on at least the SSB index and a sequence length of the first random access preamble.