Title:
UPLINK SYNCHRONIZATION TIMING DEVIATION DETERMINATION METHOD AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/202038
Kind Code:
A1
Abstract:
Disclosed in the present invention are an uplink synchronization timing deviation determination method and device, for solving the problem in the prior art that a base station in an NB-IoT system has low accuracy in determining an uplink synchronization timing deviation by performing FFT and IDFT processing on a preamble sequence. The method specifically comprises: a base station receiving a preamble signal transmitted by a terminal device; determining channel estimation values of a frequency domain channel occupied for transmitting each symbol group of the preamble signal; performing, on the basis of a frequency hopping pattern used for transmitting the preamble signal, a conjugate multiplication on the channel estimation values corresponding to each symbol group to obtain a first radian value, and determining, on the basis of the first radian value, an uplink synchronization timing deviation of the terminal device.
Inventors:
YU LI (CN)
Application Number:
PCT/CN2018/085328
Publication Date:
November 08, 2018
Filing Date:
May 02, 2018
Export Citation:
Assignee:
DATANG MOBILE COMMUNICATIONS EQUIPMENT CO LTD (CN)
International Classes:
H04L7/00
Foreign References:
| CN101997804A | 2011-03-30 | |||
| CN102215184A | 2011-10-12 | |||
| EP1826972A2 | 2007-08-29 | |||
| US20030227978A1 | 2003-12-11 | |||
| CN201710309229A | 2017-05-04 |
Other References:
See also references of EP 3621241A4
Attorney, Agent or Firm:
TDIP & PARTNERS (CN)
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