Title:
TIME SYNCHRONIZATION METHOD, COMMUNICATION DEVICE, AND SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/082674
Kind Code:
A1
Abstract:
The present application relates to a time synchronization method, a communication device, and a system. A second device receives a first optical signal having a first wavelength that is sent by a first device over a first optical fiber, the moment for sending the first optical signal being t1, and the moment for receiving the first optical signal being t2, and the second devices sends a second optical signal having a second wavelength to the first device over the first optical fiber, the moment for sending the second optical signal being t3, and the moment for receiving the second optical signal being t4; the second device receives a third optical signal having the second wavelength that is sent by the first device over a second optical fiber, the moment for sending the third optical signal being t5, and the moment for receiving the third optical signal being t6, and the second devices sends a fourth optical signal having the first wavelength to the first device over the second optical fiber, the moment for sending the fourth optical signal being t7, and the moment for receiving the fourth optical signal being t8; the second device performs time synchronization with the first device according to t1, t2, t3, t4, t5, t6, t7, and t8.
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Inventors:
LUO JUN (CN)
JIANG ZHIPING (CN)
MENG FANSHUN (CN)
LI JIANG (CN)
SUN CHUN (CN)
JIANG ZHIPING (CN)
MENG FANSHUN (CN)
LI JIANG (CN)
SUN CHUN (CN)
Application Number:
PCT/CN2020/111117
Publication Date:
May 06, 2021
Filing Date:
August 25, 2020
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H04J3/06
Foreign References:
| CN103155450A | 2013-06-12 | |||
| CN105933085A | 2016-09-07 | |||
| CN105187275A | 2015-12-23 | |||
| US20170150464A1 | 2017-05-25 |
Other References:
HUAWEI, HISILICON: "Discussion on over-the-air time synchronization for URLLC", 3GPP DRAFT; R1-1711432, vol. RAN WG1, 17 June 2017 (2017-06-17), Qingdao, China, pages 1 - 3, XP051305583
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