US 11,678,377 B2
Random access preamble sequence generation method and user equipment
Yue Zhao, Beijing (CN); Li Chai, Shenzhen (CN); Zhiheng Guo, Beijing (CN); and Xingqing Cheng, Beijing (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Feb. 4, 2021, as Appl. No. 17/167,889.
Application 17/167,889 is a continuation of application No. 16/364,556, filed on Mar. 26, 2019, granted, now 10,932,299.
Application 16/364,556 is a continuation of application No. PCT/CN2016/100957, filed on Sep. 29, 2016.
Prior Publication US 2021/0160932 A1, May 27, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 74/08 (2009.01); H04W 74/00 (2009.01); H04L 27/34 (2006.01); H04J 13/00 (2011.01); H04J 13/22 (2011.01)
CPC H04W 74/0833 (2013.01) [H04J 13/0062 (2013.01); H04J 13/22 (2013.01); H04L 27/3444 (2013.01); H04W 74/006 (2013.01); H04W 74/008 (2013.01); H04W 74/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A random access method, comprising:
determining, by a communications apparatus based on a preset correspondence between a set of Ncs indexes and a set of Ncs values, a target Ncs index indicating a Ncs value, wherein the Ncs value is for calculating a cyclic shift value of a root sequence and the set of Ncs values comprises {15, 18, 22, 26, 32, 38, 46, 55, 68, 82, 100, 118, 137};
sending, by the communications apparatus, signaling to a user equipment, wherein the signaling carries the target Ncs index; and
performing, by the communications apparatus, random access with the user equipment based on the root sequence and the Ncs value indicated by the target Ncs index.