Patents by Inventor Sung Jo Yun
Sung Jo Yun has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8825393Abstract: A method for providing a location service and a mobile terminal are provided. The location service providing method includes determining a positioning method based on location information of the mobile terminal and measurement information used for calculating the location of the mobile terminal, determining a map switch indicator by using at least one of the determined positioning method, the location information, and the measurement information, selecting a global map (i.e., the whole area map) or a local map according to the determined map switch indicator, and indicating the location of the mobile terminal on the selected map.Type: GrantFiled: December 13, 2011Date of Patent: September 2, 2014Assignee: Electronics and Telecommunications Research InstituteInventors: Young Su Cho, Sung Jo Yun, Myung In Ji
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Patent number: 8787930Abstract: A method and apparatus for estimating a position of an access point (AP) includes (a) measuring a strength of a signal, transmitted by the AP, at three or more measurement points (MPs), (b) selecting an imaginary attenuation factor, (c) calculating a range between the AP and each of the MPs on the basis of the imaginary attenuation factor and a strength of a signal measured at the MP, (d) calculating an intersecting point of ranging circles in each of which a position of the MP is a center and the range between the MP and the AP is a radius, (e) calculating a best intersecting point from among a plurality of the intersecting points obtained by repeating the steps (c) and (d) while changing the imaginary attenuation factor, and (f) estimating the best intersecting point as the position of the AP.Type: GrantFiled: November 1, 2011Date of Patent: July 22, 2014Assignee: Electronics and Telecommunications Research InstituteInventors: Uzair Ahmad, Wan Sik Choi, Sang Joon Park, Young Su Cho, Do Hyun Kim, Dong Kyoo Kim, Sung Jo Yun, Myung In Ji
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Patent number: 8274916Abstract: A terminal location measuring device includes a database for storing registration information of a plurality of access points (AP's) forming a first infrastructure system for wireless LAN-based indoor location determination. The terminal location measuring device sets a search range of a database by using location information of the terminal acquired through a second infrastructure system that is different from the first infrastructure system, an identifier of at least one of a plurality of AP's, and a signal measurement value. The terminal location measuring device extracts registration information of an AP having the same identifier as at least one AP within the search range of the database, and measures a location of the terminal by using registration information of the AP.Type: GrantFiled: January 12, 2010Date of Patent: September 25, 2012Assignee: Electronics & Telecommunications Research InstituteInventors: Byung Doo Kim, Youngsu Cho, Sung Jo Yun, Myung In Ji
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Publication number: 20120150434Abstract: A method for providing a location service and a mobile terminal are provided. The location service providing method includes determining a positioning method based on location information of the mobile terminal and measurement information used for calculating the location of the mobile terminal, determining a map switch indicator by using at least one of the determined positioning method, the location information, and the measurement information, selecting a global map (i.e., the whole area map) or a local map according to the determined map switch indicator, and indicating the location of the mobile terminal on the selected map.Type: ApplicationFiled: December 13, 2011Publication date: June 14, 2012Applicant: Electronics and Telecommunications Research InstituteInventors: Young Su CHO, Sung Jo YUN, Myung In JI
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Publication number: 20120122475Abstract: A method and apparatus for estimating a position of an access point (AP) in a Wi-Fi system is provided. The method includes measuring a strength of a signal, transmitted by the AP, at three or more measurement points (MPs), selecting an imaginary attenuation factor, calculating a range between the AP and each of the MPs on the basis of the imaginary attenuation factor and a strength of a signal measured at the MP, calculating an intersecting point of ranging circles in each of which a position of the MP is a center and the range between the MP and the AP is a radius, calculating a best intersecting point from among a plurality of the intersecting points obtained by repeating the calculating the range and the calculating the intersecting point of ranging circles while changing the imaginary attenuation factor, and estimating the best intersecting point as the position of the AP.Type: ApplicationFiled: November 1, 2011Publication date: May 17, 2012Applicant: Electronics and Telecommunications Research InstituteInventors: Uzair Ahmed, Wan Sik Choi, Sang Joon Park, Young Su Cho, Do Hyun Kim, Dong Kyoo Kim, Sung Jo Yun, Myung In Ji
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Publication number: 20110064000Abstract: A terminal location measuring device includes a database for storing registration information of a plurality of access points (AP's) forming a first infrastructure system for wireless LAN-based indoor location determination. The terminal location measuring device sets a search range of a database by using location information of the terminal acquired through a second infrastructure system that is different from the first infrastructure system, an identifier of at least one of a plurality of AP's, and a signal measurement value. The terminal location measuring device extracts registration information of an AP having the same identifier as at least one AP within the search range of the database, and measures a location of the terminal by using registration information of the AP.Type: ApplicationFiled: January 12, 2010Publication date: March 17, 2011Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Byung Doo KIM, Youngsu Cho, Sung Jo Yun, Myung In Ji
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Publication number: 20100166047Abstract: Provided are a method for detecting a received signal and an apparatus for detecting a satellite navigation received signal using the same. The present invention provides cells where a correlation value obtained through parallel signal detection is a predetermined signal detection threshold value or more are selected and time domain correlation is performed on the cells so that the correlation value is verified. The cells having the predetermined verified threshold value or more are detected as a final received signal.Type: ApplicationFiled: November 2, 2009Publication date: July 1, 2010Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Byung Doo KIM, Youngsu CHO, Seong Yun CHO, Sung Jo YUN, Sun-Joong KIM, Wan Sik CHOI, Jong-Hyun PARK, Luis Enrique Aguado, Yeqiu Ying
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Publication number: 20100150061Abstract: Provided are an access point arrangement device and a method for wireless location determination. An access point is arranged on a numerical map, received signal strength of a signal received from the access point for each grid point is calculated, and DOP and position error per grid point are calculated by using the received signal strength per grid point. It is determined whether to rearrange the currently arranged access point based on a ratio of a grid point with DOP less than a threshold value for entire grid points on the numerical map and a ratio of a grid point with a position error that is less than a threshold value.Type: ApplicationFiled: August 20, 2009Publication date: June 17, 2010Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Seong Yun Cho, Byung Doo Kim, Youngsu Cho, Sung Jo Yun, Sun-Joong Kim, Wan Sik Choi, Jong-Hyun Park
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Publication number: 20100137001Abstract: The present invention relates to a terminal and a terminal location providing method. The terminal for selectively accessing a plurality of base stations supporting different communication systems includes a first network interface card that is turned on when the terminal is turned on, a second network interface card that is turned on or activated when receiving the terminal's location information request, a power controller for controlling power of the first and second network interface cards, and a processor for receiving the terminal's location information request and controlling the power of the first and second network interface cards through the power controller.Type: ApplicationFiled: October 20, 2009Publication date: June 3, 2010Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Youngsu CHO, Byung Doo KIM, Seong Yun CHO, Sung Jo YUN, Sun-Joong KIM, Wan Sik CHOI, Jong-Hyun PARK
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Publication number: 20100136999Abstract: An apparatus for determining a position of a terminal calculates distances between a terminal and a plurality of base stations by using time information acquired by a reference station among the plurality of base stations through unidirectional communication between the terminal and the base stations and between the base stations, and determines a position of the terminal by using the calculated distances.Type: ApplicationFiled: September 1, 2009Publication date: June 3, 2010Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Byung Doo KIM, Youngsu CHO, Seong Yun CHO, Sung Jo YUN, Sun-Joong KIM, Wan Sik CHOI, Jong-Hyun PARK
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Publication number: 20100106745Abstract: Provided is a fingerprint database generating method and device for wireless location. Signal strength is estimated by using access points on a numerical map, position coordinates of grid points, and a radio wave attenuation model so as to generate a fingerprint database. A simulation error is computed based on actual survey data measured in the real space, and the estimated signal strength is corrected by using the computed simulation error to thus generate a fingerprint database.Type: ApplicationFiled: August 4, 2009Publication date: April 29, 2010Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Seong Yun CHO, Byung Doo Kim, Youngsu Cho, Sung Jo Yun, Sun-Joong Kim, Wan Sik Choi, Jong-Hyun Park