US 12,068,899 B2
Method for sending random access preamble sequence, device, and system
Yue Zhao, Beijing (CN); Zhiheng Guo, Beijing (CN); Qiang Wu, 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 Apr. 1, 2021, as Appl. No. 17/220,731.
Application 17/220,731 is a continuation of application No. 16/345,148, granted, now 10,985,858, previously published as PCT/CN2016/103403, filed on Oct. 26, 2016.
Prior Publication US 2021/0234627 A1, Jul. 29, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 27/26 (2006.01); H04J 13/00 (2011.01)
CPC H04L 27/2613 (2013.01) [H04J 13/0062 (2013.01); H04L 27/26 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method, performed by a device for communication system or a processor for the device, comprising:
sending indication information to a terminal device, the indication information indicating an NCS value, and
receiving, from the terminal device, a random access preamble sequence xu,v(n), wherein xu,v(n) is based on a sequence with a root sequence number u and a sequence length NZC, the sequence is represented by xu(n), and wherein xu,v(n)=xu((n+Cv)mod NZC), mod represents a modulo operation, and Cv is a cyclic shift that satisfies:

OG Complex Work Unit Math
wherein NCS has a value indicated by the indication information; and
for

OG Complex Work Unit Math
 satisfy:

OG Complex Work Unit Math
wherein du satisfies:

OG Complex Work Unit Math
 and
p is defined as a smallest nonnegative integer that satisfies (p×u)mod NZC=1.