Title:
MEASUREMENT DEVICE AND MEASUREMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2022/107184
Kind Code:
A1
Abstract:
A measurement device according to an aspect of the present invention comprises: a generation unit for generating first and second optical pulse trains in which time intervals between optical pulses are constant; a transmission unit for transmitting the first optical pulse train to a target device to be measured; a reception unit for receiving the first optical pulse train returned from the target device; a measurement unit for measuring the number of optical pulses transmitted by the transmission unit during a period from when the transmission unit transmits optical pulses included in the first optical pulse train until when the reception unit receives the optical pulses; a determination unit for determining a phase quantity corresponding to a phase difference between the received first optical pulse train and the second optical pulse train; and a calculation unit for calculating a propagation delay between the measurement device and the target device on the basis of the measured number of optical pulses and the determined phase quantity.
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Inventors:
YAZAWA GO (JP)
YOSHIHARA SHINICHI (JP)
YOSHIHARA SHINICHI (JP)
Application Number:
PCT/JP2020/042705
Publication Date:
May 27, 2022
Filing Date:
November 17, 2020
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04L9/12; H04B10/079; H04B10/70
Foreign References:
| CN109495169A | 2019-03-19 | |||
| CN109039453A | 2018-12-18 | |||
| US20130322872A1 | 2013-12-05 | |||
| JP2018082237A | 2018-05-24 |
Attorney, Agent or Firm:
KURATA, Masatoshi et al. (JP)
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