Patents by Inventor Ji Hyoung Ahn

Ji Hyoung Ahn 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).

  • Publication number: 20200367035
    Abstract: Disclosed is a method by which a first terminal supports vehicle-to-everything (V2X) communication through a first data transmission, comprising the steps of: determining a wireless resource for a second data transmission of a second terminal; transmitting, to the second terminal, first data including information of the wireless resource; and receiving, by using the wireless resource, second data transmitted from the second terminal.
    Type: Application
    Filed: September 10, 2018
    Publication date: November 19, 2020
    Inventors: Ho-Yeon LEE, Min Young CHUNG, Sung-Hoon KIM, Jun Suk KIM, Young-Kyo BAEK, Jung-Je SON, Seung-Ri JIN, Tae-Jin LEE, Yunmin KIM, Ji Hyoung AHN
  • Patent number: 10819159
    Abstract: Disclosed is a method of wireless power transfer to at least one wireless station connected to a network from an energy signal transfer apparatus operating in the same frequency band as a wireless local area network (WLAN). The method includes: receiving an energy transfer request from a first wireless station connected to the network; calculating the direction of energy signal transfer in response to the energy transfer request; and sending an energy signal to the first wireless station in the calculated direction of energy signal transfer for the duration of energy transfer. The energy signal transfer apparatus allows for power transfer without causing interference with data transmission on a channel where data transmission occurs, by transferring energy only in the direction of stations requesting energy transfer by beamforming technology.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: October 27, 2020
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Tae-Jin Lee, Young Il Cho, Ji Hyoung Ahn
  • Patent number: 10681270
    Abstract: An electronic device comprises a camera; a sensor configured to sense a motion; and one or more processors, wherein the one or more processors are configured to: sequentially acquire a plurality of images using the camera and acquire motion information of the plurality of images using the sensor, during a specified time; create a panoramic image with a first image sub-set comprising a portion of the plurality of images and a second image sub-set comprising another portion of the plurality of images, and moving picture data related to the panoramic image; and determine whether to correct at least a partial section of the moving picture data using a particular image from the second image sub-set that corresponds to the at least the partial section of the moving picture data, based on the frame rate of the at least the partial section of the moving picture data.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: June 9, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yoon Jeong Heo, Ievgen Zaichuk, Ki Hwan Choi, Jin Joo Park, Stephanie Kim Ahn, Si Hyoung Lee, Ji Yoon Park, Jung Eun Lee
  • Patent number: 10536388
    Abstract: Provided are an apparatus and a method for scheduling contention-based data transmission in a network system including an access point (AP) and a plurality of terminals. The method includes determining a contention window (CW) size based on the number of terminals connected to the access point, and transmitting information about the contention window size to any one of the plurality of terminals. The apparatus includes a processor and an RF unit. Here, the processor is configured to determine a contention window (CW) size based on the number of terminals connected to the access point, and transmit information on the contention window size to any one of the plurality of terminals through the RF unit.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: January 14, 2020
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Tae-Jin Lee, Youngil Cho, Ji Hyoung Ahn
  • Patent number: 10536040
    Abstract: Provided are a control method for a wireless power transfer apparatus considering interference in wireless powered communication networks, and a wireless power transfer apparatus. The control method of the wireless power transfer apparatus includes: performing, by at least one wireless power transfer apparatus, a distributed coordination function (DCF) based contention process with at least one wireless communication terminal; and transmitting, by the wireless power transfer apparatus which won in the DCF based contention process, an energy frame to the at least one wireless communication terminal.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: January 14, 2020
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Tae-Jin Lee, Ji Hyoung Ahn, Seung Yong Jeon, Min Young Chung
  • Patent number: 10448216
    Abstract: A network broadcast method using a MAC unicast and an MPR node allows a source node to transmit a data packet to at least one MPR node which is located within one-hop distance from the source node and allows the at least one MPR node to transmit the data packet to each next-ranked MPR nodes. At least one normal node, which is not an MPR node while being located within one-hop distance from the source node, receives the data packet of the source node, which is transferred from the source node to an MPR node or transferred between MPR nodes through overhearing. Although the source node and MPR nodes are in a hidden-node relationship, collision is prevented, thereby minimizing data packet loss to improve the transmission reliability, and enabling the data packet of the source node to be reliably broadcasted on a network.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: October 15, 2019
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Tae-Jin Lee, Chang-Yeong Oh, Pyeong-Soo Mah, Ji Hyoung Ahn, Woo Suk Cha, Jongho Park, Mingyu Lee
  • Publication number: 20190089204
    Abstract: Disclosed is a method of wireless power transfer to at least one wireless station connected to a network from an energy signal transfer apparatus operating in the same frequency band as a wireless local area network (WLAN). The method includes: receiving an energy transfer request from a first wireless station connected to the network; calculating the direction of energy signal transfer in response to the energy transfer request; and sending an energy signal to the first wireless station in the calculated direction of energy signal transfer for the duration of energy transfer. The energy signal transfer apparatus allows for power transfer without causing interference with data transmission on a channel where data transmission occurs, by transferring energy only in the direction of stations requesting energy transfer by beamforming technology.
    Type: Application
    Filed: September 20, 2018
    Publication date: March 21, 2019
    Applicant: Research & Business Foundation Sungkyunkwan University
    Inventors: Tae-Jin LEE, Young Il CHO, Ji Hyoung AHN
  • Publication number: 20180331966
    Abstract: Provided are an apparatus and a method for scheduling contention-based data transmission in a network system including an access point (AP) and a plurality of terminals. The method includes determining a contention window (CW) size based on the number of terminals connected to the access point, and transmitting information about the contention window size to any one of the plurality of terminals. The apparatus includes a processor and an RF unit. Here, the processor is configured to determine a contention window (CW) size based on the number of terminals connected to the access point, and transmit information on the contention window size to any one of the plurality of terminals through the RF unit.
    Type: Application
    Filed: December 28, 2017
    Publication date: November 15, 2018
    Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
    Inventors: Tae-Jin LEE, Youngil CHO, Ji Hyoung AHN
  • Publication number: 20170373725
    Abstract: Provided are a control method for a wireless power transfer apparatus considering interference in wireless powered communication networks, and a wireless power transfer apparatus. The control method of the wireless power transfer apparatus includes: performing, by at least one wireless power transfer apparatus, a distributed coordination function (DCF) based contention process with at least one wireless communication terminal; and transmitting, by the wireless power transfer apparatus which won in the DCF based contention process, an energy frame to the at least one wireless communication terminal.
    Type: Application
    Filed: June 21, 2017
    Publication date: December 28, 2017
    Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
    Inventors: Tae-Jin LEE, Ji Hyoung AHN, Seung Yong JEON, Min Young CHUNG
  • Patent number: 9787584
    Abstract: According to the present invention, there is disclosed a method for reserving data transmission from a transmitting node to a receiving node in a receiver-initiated asynchronous MAC (Medium Access Control) protocol. The method includes receiving a base beacon frame from the receiving node and when transmitting a data frame to the receiving node, transmitting the data frame, with a reserved field value set in a portion of a header of the data frame.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: October 10, 2017
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Tae Jin Lee, Ji Hyoung Ahn, Min Gyu Lee, Se Houn Lee
  • Patent number: 9785803
    Abstract: Disclosed are a method, an apparatus, and a system for collecting tags which may reduce recognition time and energy consumption as compared with a tag collection technology in an active radio frequency identification (RFID) system standard according to the related art. The method for collecting tags by an apparatus for collecting the tags in a RFID system, one collection round including: recognizing tags; and collecting data from recognized tags, wherein the recognizing of the tags comprises one scan period, and comprises repeatedly performing a scan process until the tags are recognized using a bit map indicating a recognition status of the tags within one scan period.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: October 10, 2017
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Tae Jin Lee, Jae Young Lee, Min Gyu Lee, Ji Hyoung Ahn
  • Patent number: 9773132
    Abstract: Provided is a method of preventing collision between a plurality of RFID tags by an RFID reader. An anti-collision method by a tag reader apparatus in an RFID system including a plurality of RFID tags, includes changing a length of a collision recovery slot in the collision recovery slot which successfully identifies a plurality of tags even though at least two tags simultaneously replied in one slot to cause collision so that data transmission of at least one identified tag is achieved.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: September 26, 2017
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Tae Jin Lee, Yun Min Kim, Ji Hyoung Ahn, Se Houn Lee
  • Patent number: 9547781
    Abstract: A method for recognizing a tag in an environment where the same frequency band is in use and an NFC device for the same are provided. Depending on whether a radio channel is in use, the NFC device changes a first operation mode to a second operation mode, requests slot assignment for tag recognition at the second operation mode, and changes the second operation mode back to the first operation mode to perform a tag recognition process at an assigned slot.
    Type: Grant
    Filed: December 1, 2014
    Date of Patent: January 17, 2017
    Assignee: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
    Inventors: Tae Jin Lee, Chul Wan Park, Ji Hyoung Ahn
  • Publication number: 20160239692
    Abstract: Provided is a method of preventing collision between a plurality of RFID tags by an RFID reader. An anti-collision method by a tag reader apparatus in an RFID system including a plurality of RFID tags, includes changing a length of a collision recovery slot in the collision recovery slot which successfully identifies a plurality of tags even though at least two tags simultaneously replied in one slot to cause collision so that data transmission of at least one identified tag is achieved.
    Type: Application
    Filed: February 16, 2016
    Publication date: August 18, 2016
    Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
    Inventors: Tae Jin LEE, Yun Min KIM, Ji Hyoung AHN, Se Houn LEE
  • Publication number: 20150381518
    Abstract: According to the present invention, there is disclosed a method for reserving data transmission from a transmitting node to a receiving node in a receiver-initiated asynchronous MAC (Medium Access Control) protocol. The method includes receiving a base beacon frame from the receiving node and when transmitting a data frame to the receiving node, transmitting the data frame, with a reserved field value set in a portion of a header of the data frame.
    Type: Application
    Filed: June 25, 2015
    Publication date: December 31, 2015
    Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
    Inventors: Tae Jin LEE, Ji Hyoung AHN, Min Gyu LEE, Se Houn LEE
  • Publication number: 20150317500
    Abstract: Disclosed are a method, an apparatus, and a system for collecting tags which may reduce recognition time and energy consumption as compared with a tag collection technology in an active radio frequency identification (RFID) system standard according to the related art. The method for collecting tags by an apparatus for collecting the tags in a RFID system, one collection round including: recognizing tags; and collecting data from recognized tags, wherein the recognizing of the tags comprises one scan period, and comprises repeatedly performing a scan process until the tags are recognized using a bit map indicating a recognition status of the tags within one scan period.
    Type: Application
    Filed: April 30, 2015
    Publication date: November 5, 2015
    Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
    Inventors: Tae Jin LEE, Jae Young LEE, Min Gyu LEE, Ji Hyoung AHN
  • Publication number: 20150154426
    Abstract: A method for recognizing a tag in an environment where the same frequency band is in use and an NFC device for the same are provided. Depending on whether a radio channel is in use, the NFC device changes a first operation mode to a second operation mode, requests slot assignment for tag recognition at the second operation mode, and changes the second operation mode back to the first operation mode to perform a tag recognition process at an assigned slot.
    Type: Application
    Filed: December 1, 2014
    Publication date: June 4, 2015
    Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
    Inventors: Tae Jin LEE, Chul Wan PARK, Ji Hyoung AHN
  • Publication number: 20140146803
    Abstract: A network broadcast method using a MAC unicast and an MPR node allows a source node to transmit a data packet to at least one MPR node which is located within one-hop distance from the source node and allows the at least one MPR node to transmit the data packet to each next-ranked MPR nodes. At least one normal node, which is not an MPR node while being located within one-hop distance from the source node, receives the data packet of the source node, which is transferred from the source node to an MPR node or transferred between MPR nodes through overhearing. Although the source node and MPR nodes are in a hidden-node relationship, collision is prevented, thereby minimizing data packet loss to improve the transmission reliability, and enabling the data packet of the source node to be reliably broadcasted on a network.
    Type: Application
    Filed: November 1, 2011
    Publication date: May 29, 2014
    Applicant: Research & Business Foundation Sungkyunkwan University
    Inventors: Tae-Jin Lee, Chang-Yeong Oh, Pyeong Soo Mah, Ji Hyoung Ahn, Woo Suk Cha, Jongho Park, Mingyu Lee