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Title:
METHOD AND COMMUNICATION SYSTEM FOR SIMULTANEOUSLY SETTING COORDINATES OF ANCHOR AND TAG BY USING WIRELESS TRANSMISSION AND RECEPTION, METHOD FOR COMPENSATING FOR TIME DIFFERENCE IN POSITIONING SYSTEM, AND POSITIONING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/059478
Kind Code:
A1
Abstract:
A communication system according to the present specification can simultaneously calculate three-dimensional coordinates of anchors and tags by measuring the line-of-sight distance between the anchors and the anchors, and between the anchors and the tags by using positioning techniques. More specifically, master anchors MA0, MA1, and MA2, which are references when a user calculates the positions of anchors, are firstly defined, coordinates of the master anchor 0 (MA0) are arbitrarily set to (x1, y1, z1), positions of other master anchors are calculated by measuring the distance between the master anchors in a two way ranging (TWR) scheme on the basis of the coordinates, and relative coordinates of slave anchors are calculated by measuring the distance between the master anchor and other anchors in a TWR scheme. Simultaneously, the tags receive signals in a one way ranging (OWR) scheme, the signals being transmitted by the anchors during the execution of TWR between the anchors, and calculates the relative coordinates of tags on the basis of the coordinates of the anchors by calculating the time difference of arrival (TDoA) of the received signals.

Inventors:
CHOI BONG YONG (KR)
LEE SANG ROK (KR)
Application Number:
KR2018/003230
Publication Date:
March 28, 2019
Filing Date:
March 20, 2018
Export Citation:
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Assignee:
ENTOSOFT CO LTD (KR)
International Classes:
G01S5/02; G01S1/68; H04W64/00
Foreign References:
KR101627419B12016-06-07
KR20090096141A2009-09-10
KR100769673B12007-10-24
JP2013074338A2013-04-22
KR101219913B12013-01-09
Attorney, Agent or Firm:
YOO, Cheol Hyun (KR)
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