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Patent Searching and Data


Title:
SLAVE DEVICE, TIME SYNCHRONIZATION SYSTEM, TIME SYNCHRONIZATION METHOD, AND TIME SYNCHRONIZATION PROGRAM
Document Type and Number:
WIPO Patent Application WO/2021/049406
Kind Code:
A1
Abstract:
The present invention includes: a plurality of reception means 801, each of which receives a packet via a given path; a reception interval measurement means 802 for measuring the reception interval of packets received by each of the plurality of reception means; a transmission interval measurement means 803 for using a host clock to measure, as a transmission interval, the interval at which a master device transmits packets; a time difference calculation means 804 for calculating the difference between each reception interval and transmission interval; a standard deviation calculation means 805 for obtaining the dispersion from a fixed number of sets of difference calculated along the passage of time by the time difference calculation means 804 for each transmission interval, and for calculating a standard deviation value; a comparison selection means 806 for selecting, for each path, the smallest value from among the values calculated by the standard deviation calculation means 805; and a correction means 807 for using the selected value to perform time correction.

Inventors:
TAKAYANAGI ASAKO (JP)
Application Number:
JP2020/033393
Publication Date:
March 18, 2021
Filing Date:
September 03, 2020
Export Citation:
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Assignee:
NEC CORP (JP)
International Classes:
H04L7/00; G04G5/00
Attorney, Agent or Firm:
IWAKABE Fuyuki et al. (Yomiuriyaesu Bldg. 6F 8-7, Kyobashi 2-chome, Chuo-k, Tokyo 31, JP)
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