Patents by Inventor Min-Ho Cheong

Min-Ho Cheong 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).

  • OFDM TRANSMISSION METHOD AND DEVICE IN WIRELESS LAN SYSTEM
    Publication number: 20180145860
    Abstract: An apparatus and method for orthogonal frequency division multiplexing (OFDM) transmission in a wireless local area network (WLAN) system is disclosed, in which the apparatus for OFDM transmission in the WLAN system includes a signal repetition unit to repeat an encoded signal based on a block unit and output the encoded signal and a repeated signal, an interleaver to interleave the encoded signal and the repeated signal and output an interleaved signal, a modulator to modulate the interleaved signal and output modulated symbols, and a phase rotation unit to phase shift the modulated symbols.
    Type: Application
    Filed: January 18, 2018
    Publication date: May 24, 2018
    Inventors: Hee Jung YU, Min Ho CHEONG, Jae Seung LEE, Hyoung Jin KWON, Sok Kyu LEE
  • COMMUNICATION METHOD USING INTERFERENCE ALIGNMENT IN WIRELESS LAN
    Publication number: 20180102816
    Abstract: Disclosed is a communication method using interference alignment in a wireless local area network (WLAN). An access point (AP) according to one embodiment may receive first channel information between a station associated with the AP and the AP and second channel information between the station and a neighboring AP to perform interference alignment in cooperation with the AP from the station, and perform interference alignment based on the first channel information and the second channel information.
    Type: Application
    Filed: December 4, 2017
    Publication date: April 12, 2018
    Inventors: Jae Seung LEE, Jin Hyung OH, Gwang Zeen KO, Hyun Duk KANG, Hyoung Jin KWON, Myung Sun SONG, Sok Kyu LEE, Min Ho CHEONG, Jae Ick CHOI
  • METHOD AND DEVICE FOR ALLOCATING RESOURCE IN WIRELESS LAN SYSTEM, COMMUNICATION TERMINAL METHOD AND COMMUNICATION TERMINAL
    Publication number: 20180098310
    Abstract: Provided is a method and apparatus for allocating resources in a wireless local area network (WLAN) system, the method including determining a restricted access bandwidth (RAB) interval based on at least a bandwidth or a partial bandwidth among a plurality of bandwidths, and setting a restricted access window (RAW) of a time domain based on the RAB interval.
    Type: Application
    Filed: September 15, 2017
    Publication date: April 5, 2018
    Inventors: Min Ho CHEONG, Hyoung Jin KWON, Jae Seung LEE, Jae Woo PARK, Sok Kyu LEE
  • APPARATUS AND METHOD FOR CONTROLLING SLOT USAGE
    Publication number: 20180092132
    Abstract: Provided is slot use control apparatus and method, including an access point (AP) to control a slotted channel access of a station (STA) in a wireless local area network (WLAN) includes generating a synchronization (synch) frame including an identification value indicating an STA allocated to a slot, and broadcasting the generated synch frame when a channel is in an idle state at a start point of the slot.
    Type: Application
    Filed: September 27, 2017
    Publication date: March 29, 2018
    Inventors: Hyoung Jin KWON, Jae Seung LEE, Min Ho CHEONG, Hee Jung YU, Jae Woo PARK, Sok Kyu LEE
  • METHOD FOR CHANGING OPERATING MODE OF WIRELESS LAN SYSTEM AND WIRELESS LAN SYSTEM
    Publication number: 20180084496
    Abstract: An operating mode change method of a wireless local area network (WLAN) system according to an exemplary embodiment includes transmitting, by a station (STA) to an access point (AP), an operating mode change request frame comprising at least one of information on a change of a traffic indication map (TIM) mode, a request for a change of a power save parameter, and information on a change of a service type of the STA, receiving, from the AP, an operating mode change response frame comprising at least one of a TIM mode allowed by the AP, a reallocated association identification (AID), and information on a changed power save parameter, and performing at least one of the change of the TIM mode and the change of the power save parameter based on the information included in the operating mode change
    Type: Application
    Filed: November 27, 2017
    Publication date: March 22, 2018
    Inventors: Jae Seung LEE, Hyoung Jin KWON, Min Ho CHEONG, Hee Jung YU, Sok Kyu LEE
  • OFDM transmission method and device in wireless LAN system
    Patent number: 9912509
    Abstract: An apparatus and method for orthogonal frequency division multiplexing (OFDM) transmission in a wireless local area network (WLAN) system is disclosed, in which the apparatus for OFDM transmission in the WLAN system includes a signal repetition unit to repeat an encoded signal based on a block unit and output the encoded signal and a repeated signal, an interleaver to interleave the encoded signal and the repeated signal and output an interleaved signal, a modulator to modulate the interleaved signal and output modulated symbols, and a phase rotation unit to phase shift the modulated symbols.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: March 6, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Hee Jung Yu, Min Ho Cheong, Jae Seung Lee, Hyoung Jin Kwon, Sok Kyu Lee
  • Method and apparatus for allocating channel in wireless local area network
    Patent number: 9882701
    Abstract: A method and apparatus for allocating a channel in a wireless local area network (WLAN) is disclosed. The method includes receiving a first frame including scheduling information with respect to a first interval from a second access point, generating a second frame including resource related information required for transmission and reception during a second interval which is continuous to the first interval, and transmitting the second frame to the second access point. Accordingly, performance of the WLAN can be improved.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: January 30, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jae Seung Lee, Hyoung Jin Kwon, Min Ho Cheong, Sok Kyu Lee
  • APPARATUS AND METHOD FOR CHANNEL ACCESS
    Publication number: 20180007713
    Abstract: A channel access method and apparatus are disclosed. The channel access method by an access point (AP) having a sector antenna in a wireless local access network (WLAN), may include transmitting a sector beacon with respect to any one sector among a plurality of sectors, transmitting and receiving data with at least one station in any one sector during a pre-scheduled sector interval, sequentially performing transmission of the sector beacon and transmission and reception of the data with respect to remaining sectors of the plurality of sectors excluding the any one sector, transmitting an omni beacon with respect to all of the plurality of sectors, and transmitting and receiving data with respect to at least one station of the plurality of sectors during a pre-scheduled Basic Service Set (BSS) interval.
    Type: Application
    Filed: September 15, 2017
    Publication date: January 4, 2018
    Inventors: Min Ho CHEONG, Hyoung Jin KWON, Jae Seung LEE, Jae Woo PARK, Sok Kyu LEE
  • Method for changing operating mode of wireless LAN system and wireless LAN system
    Patent number: 9860837
    Abstract: An operating mode change method of a wireless local area network (WLAN) system according to an exemplary embodiment includes transmitting, by a station (STA) to an access point (AP), an operating mode change request frame comprising at least one of information on a change of a traffic indication map (TIM) mode, a request for a change of a power save parameter, and information on a change of a service type of the STA, receiving, from the AP, an operating mode change response frame comprising at least one of a TIM mode allowed by the AP, a reallocated association identification (AID), and information on a changed power save parameter, and performing at least one of the change of the TIM mode and the change of the power save parameter based on the information included in the operating mode change response frame.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: January 2, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jae Seung Lee, Hyoung Jin Kwon, Min Ho Cheong, Hee Jung Yu, Sok Kyu Lee
  • Method of providing communication service and apparatus for performing the method
    Patent number: 9847799
    Abstract: Disclosed is a method of providing a communication service and an apparatus for performing the method, in which the method includes determining a first user group including a selected user terminal to which a communication service is provided by a communication device belonging to a cell coverage area, determining a second user group including at least one candidate user terminal selected from a plurality of candidate user terminals based on interference information affecting the selected user terminal, and determining the first user group and the second user group to be a final user group to which the communication service is to be provided by the communication device.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: December 19, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Min Ho Cheong, Hyoung Jin Kwon, Sok Kyu Lee, Jae Seung Lee
  • DEVICE AND METHOD FOR CONTROLLING SLOT-BASED CHANNEL ACCESS IN WIRELESS LAN SYSTEM, AND SLOT-BASED CHANNEL ACCESS TERMINAL IN WIRELESS LAN
    Publication number: 20170353970
    Abstract: An apparatus and a method of controlling slot-based channel access by an access point (AP) to manage a network in a wireless local area network (WLAN) environment and a slot-based channel access terminal are disclosed. A slot-based channel access control apparatus of a WLAN system according to an exemplary embodiment determines one of each terminal and a group of terminals as a slot allocation target, allocates a slot defined in a beacon interval to the determined terminal or group to distinguish channel access time, and transmits a beacon including information on the allocated slot.
    Type: Application
    Filed: August 24, 2017
    Publication date: December 7, 2017
    Inventors: Hyoung Jin KWON, Jae Seung LEE, Min Ho CHEONG, Hee Jung YU, Sok Kyu LEE
  • Communication method using interference alignment in wireless LAN
    Patent number: 9838090
    Abstract: Disclosed is a communication method using interference alignment in a wireless local area network (WLAN). An access point (AP) according to one embodiment may receive first channel information between a station associated with the AP and the AP and second channel information between the station and a neighboring AP to perform interference alignment in cooperation with the AP from the station, and perform interference alignment based on the first channel information and the second channel information.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: December 5, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jae Seung Lee, Jin Hyung Oh, Gwang Zeen Ko, Hyun Duk Kang, Hyoung Jin Kwon, Myung Sun Song, Sok Kyu Lee, Min Ho Cheong, Jae Ick Choi
  • Methods for channel sounding and scheduling for interference alignment in wireless local area network
    Patent number: 9839047
    Abstract: Provided are channel sounding and scheduling methods for interference alignment in a wireless LAN. The sounding method includes transmitting a RTS frame, the RTS frame including an OIA candidate AP list that includes identification information of a plurality of access points, transmitting a CTS poll frame for triggering transmission of a CTS frame to a second access point which is a first access point in the OIA candidate AP list, and receiving a CTS frame which is a response to the CTS poll frame from the second access point. Therefore, communication performance of the wireless LAN can be improved.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: December 5, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Hyoung Jin Kwon, Sok Kyu Lee, Jae Seung Lee, Min Ho Cheong
  • Apparatus and method for controlling slot usage
    Patent number: 9807804
    Abstract: Provided is slot use control apparatus and method, including an access point (AP) to control a slotted channel access of a station (STA) in a wireless local area network (WLAN) includes generating a synchronization (synch) frame including an identification value indicating an STA allocated to a slot, and broadcasting the generated synch frame when a channel is in an idle state at a start point of the slot.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: October 31, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Hyoung Jin Kwon, Jae Seung Lee, Min Ho Cheong, Hee Jung Yu, Jae Woo Park, Sok Kyu Lee
  • Apparatus and method for channel access
    Patent number: 9807797
    Abstract: A channel access method and apparatus are disclosed. The channel access method by an access point (AP) having a sector antenna in a wireless local access network (WLAN), may include transmitting a sector beacon with respect to any one sector among a plurality of sectors, transmitting and receiving data with at least one station in any one sector during a pre-scheduled sector interval, sequentially performing transmission of the sector beacon and transmission and reception of the data with respect to remaining sectors of the plurality of sectors excluding the any one sector, transmitting an omni beacon with respect to all of the plurality of sectors, and transmitting and receiving data with respect to at least one station of the plurality of sectors during a pre-scheduled Basic Service Set (BSS) interval.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: October 31, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Min Ho Cheong, Hyoung Jin Kwon, Jae Seung Lee, Jae Woo Park, Sok Kyu Lee
  • Method and device for allocating resource in wireless LAN system, communication terminal method and communication terminal
    Patent number: 9794929
    Abstract: Provided is a method and apparatus for allocating resources in a wireless local area network (WLAN) system, the method including determining a restricted access bandwidth (RAB) interval based on at least a bandwidth or a partial bandwidth among a plurality of bandwidths, and setting a restricted access window (RAW) of a time domain based on the RAB interval.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: October 17, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Min Ho Cheong, Hyoung Jin Kwon, Jae Seung Lee, Jae woo Park, Sok Kyu Lee
  • Device and method for controlling slot-based channel access in wireless LAN system, and slot-based channel access terminal in wireless LAN
    Patent number: 9781741
    Abstract: An apparatus and a method of controlling slot-based channel access by an access point (AP) to manage a network in a wireless local area network (WLAN) environment and a slot-based channel access terminal are disclosed. A slot-based channel access control apparatus of a WLAN system according to an exemplary embodiment determines one of each terminal and a group of terminals as a slot allocation target, allocates a slot defined in a beacon interval to the determined terminal or group to distinguish channel access time, and transmits a beacon including information on the allocated slot.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: October 3, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Hyoung Jin Kwon, Jae Seung Lee, Min Ho Cheong, Hee Jung Yu, Sok Kyu Lee
  • Operation method of station in wireless local area network
    Patent number: 9769746
    Abstract: Disclosed are operation method of station in wireless local area network. An operation method comprises setting transmission power of a frame; setting a clear channel assessment (CCA) threshold based on a difference between the set transmission power and a default value of the transmission power; and performing a CCA operation based on the set CCA threshold. Therefore, performance of WLAN can be enhanced.
    Type: Grant
    Filed: June 10, 2015
    Date of Patent: September 19, 2017
    Assignee: NEWRACOM, INC.
    Inventors: Hyoung Jin Kwon, Min Ho Cheong, Hee Jung Yu
  • METHOD FOR ALLOCATING RESOURCES IN WIRELESS LAN SYSTEM AND WIRELESS LAN SYSTEM
    Publication number: 20170257872
    Abstract: Provided are a method of allocating resources in a wireless local area network (WLAN) system and the WLAN system including an access point (AP) to allocate a resource for communication between a relay and a station associated with the relay, the relay to allocate a restricted access window (RAW) or a slot for communication with a station based on the allocated resource, and the station to communicate with the relay based on the allocated RAW or the allocated slot.
    Type: Application
    Filed: May 23, 2017
    Publication date: September 7, 2017
    Inventors: Jae Seung LEE, Min Ho CHEONG, Hyoung Jin KWON, Sok Kyu LEE, Wun Cheol JEONG, Chang Sub SHIN, Cheol Sig PYO
  • Scanning method in wireless LAN system and supporting device therefor
    Patent number: 9749936
    Abstract: A scanning method performed by a station (STA) in a wireless LAN system is provided. The method comprises: transmitting a probe request frame; and receiving a short probe response frame from an access point (AP) as a response to the probe request frame. The short probe response frame includes service set ID (SSID) information or compressed SSID information of the AP.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: August 29, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jae Seung Lee, Min Ho Cheong, Hyoung Jin Kwon, Hee Jung Yu, Sok Kyu Lee