Patents by Inventor Sok Kyu Lee

Sok Kyu Lee 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).

  • 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
  • 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
  • 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
  • Method of transmitting and receiving frame for uplink multi-user multiple-input and multiple-output (UL MU-MIMO) communication
    Patent number: 9838093
    Abstract: Provided is a method of transmitting and receiving a frame for a multi-user multiple-input and multiple-output (MU-MIMO) communication in an access point (AP), the method including determining at least one transmission station (STA), transmitting, to the transmission STA, an uplink multi-user poll (UL MU poll) frame requesting a data frame, receiving the data frame from the at least one transmission STA simultaneously, and transmitting an acknowledgement (ACK) frame to the at least one transmission STA in response to the receiving.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: December 5, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jee Yon Choi, Hyoung Jin Kwon, Je Hun Lee, Sok Kyu Lee
  • Method and user terminal for dynamically controlling routing
    Patent number: 9832704
    Abstract: A method and user terminal for dynamically controlling routing are provided. The method may provide an effective routing mechanism in a system to which a plurality of radio access technologies (RATs) are applied. The method may perform routing based on characteristics of the RATs, a degree of a generated traffic load, a user preference of a RAT, and the like.
    Type: Grant
    Filed: January 7, 2015
    Date of Patent: November 28, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Je Hun Lee, Joon Soo Lee, Sok Kyu Lee
  • APPARATUS FOR TRANSMITTING AND RECEIVING DATA TO PROVIDE HIGH-SPEED DATA COMMUNICATION AND METHOD THEREOF
    Publication number: 20170325126
    Abstract: In the present invention, data generated from a source unit are distributed to at least one bandwidth; the data distributed to the respective bandwidths are encoded in order to perform an error correction; the encoded data are distributed to at least one antenna; a subcarrier is allocated to the data distributed to the respective antennas, and an inverse Fourier transform is performed; a short preamble and a first long preamble corresponding to the subcarrier are generated; a signal symbol is generated according to a data transmit mode; and a frame is generated by adding a second long preamble between the signal symbol and a data field for the purpose of estimating a channel of a subcarrier which is not used.
    Type: Application
    Filed: May 22, 2017
    Publication date: November 9, 2017
    Inventors: Hee-Jung YU, Taehyun JEON, Myung-Soon KIM, Eun-Young CHOI, Sok-kyu LEE, Deuk-Su LYU
  • METHOD OF TRANSMITTING AND RECEIVING FRAME FOR UPLINK MULTI-USER MULTIPLE-INPUT AND MULTIPLE-OUTPUT (UL MU-MIMO) COMMUNICATION
    Publication number: 20170317728
    Abstract: Provided is a method of transmitting and receiving a frame for a multi-user multiple-input and multiple-output (MU-MIMO) communication in an access point (AP), the method including determining at least one transmission station (STA), transmitting, to the transmission STA, an uplink multi-user poll (UL MU poll) frame requesting a data frame, receiving the data frame from the at least one transmission STA simultaneously, and transmitting an acknowledgement (ACK) frame to the at least one transmission STA in response to the receiving.
    Type: Application
    Filed: July 14, 2017
    Publication date: November 2, 2017
    Inventors: Jee Yon CHOI, Hyoung Jin KWON, Je Hun LEE, Sok Kyu LEE
  • 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
  • Method and apparatus for transmitting/receiving packet in wireless communication system
    Patent number: 9794912
    Abstract: A method for simultaneously transmitting packets having different lengths to two or more users in a wireless communication system includes: generating the packets to transmit to the respective users, the packets containing information on the maximum transmission length of the packets having different lengths; and simultaneously transmitting the generated packets to the respective users. The maximum transmission length is represented by the number of symbols, and each of the packets sequentially contains control information required for transmitting the packet, data, a tail field, and a PHY pad field, and is generated by inserting a MAC pad between the control information and the data such that the tail field and the PHY pad field are positioned at the last byte of the last symbol of the maximum transmission length.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: October 17, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Yun-Joo Kim, 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
  • Preamble configuring method in the wireless LAN system, and a method for a frame synchronization
    Patent number: 9769002
    Abstract: A method of configuring a preamble of a downlink frame for synchronization in data frame transmission of a 60 GHz a wireless local area network system, the method comprising arranging a short preamble having a plurality of repetitive S symbols, and an IS symbol, and arranging a long preamble having a long cyclic prefix (CP) and a plurality of L symbols for frame synchronization and symbol timing by performing auto-correlation according to the length of window of the auto-correlation.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: September 19, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Woo-Yong Lee, Sok-Kyu Lee
  • 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
  • METHOD AND APPARATUS FOR TRANSCEIVING DATA IN A MIMO SYSTEM
    Publication number: 20170222697
    Abstract: The present invention relates to a method and apparatus for transceiving data. A method in which a transmitting terminal transmits data to a receiving terminal in a MIMO system according to one embodiment of the present invention comprises the following steps: generating a data field containing the data; generating a signal field containing information on the data field; generating a data frame containing the data field and the signal field; and transmitting the data frame to the receiving terminal. According to the present invention, an end of the frame being transmitted is accurately notified to the receiving terminal in a communication system in which the frame is transmitted using MIMO, thereby decoding the frame in a more efficient manner at the receiving terminal.
    Type: Application
    Filed: April 12, 2017
    Publication date: August 3, 2017
    Inventors: Jae Woo PARK, Jong Ee OH, IL-Gu LEE, Sok-Kyu LEE, Min Ho CHEONG, Jee Yon CHOI, Jae Seung LEE, Yun Joo KIM
  • SCANNING METHOD IN WIRELESS LAN SYSTEM AND SUPPORTING DEVICE THEREFOR
    Publication number: 20170215229
    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: Application
    Filed: April 7, 2017
    Publication date: July 27, 2017
    Inventors: Jae Seung LEE, Min Ho CHEONG, Hyoung Jin KWON, Hee Jung YU, Sok Kyu LEE
  • SEMICONDUCTOR MEMORY DEVICE AND DATA STORAGE DEVICE INCLUDING THE SAME
    Publication number: 20170212816
    Abstract: A data storage device includes a semiconductor memory device including a memory cell array which includes a main cell area and a spare cell area; and a controller coupled with the semiconductor memory device through a plurality of main data lines and at least one spare data line, and configured to transmit main data to be stored in the main cell area, through the plurality of main data lines, and transmit spare data for managing the main data to be stored in the spare cell area, through the spare data line.
    Type: Application
    Filed: May 4, 2016
    Publication date: July 27, 2017
    Inventor: Sok Kyu LEE
  • APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING DATA IN COMMUNICATION SYSTEM
    Publication number: 20170188360
    Abstract: A data transmission apparatus in a communication system includes a reception unit configured to receive terminal information from a plurality of terminals through a new frequency band for transmission and reception of data between the plurality of terminals and an AP (access point); a determination unit configured to determine access timing of the terminals to the AP by using the terminal information, and generate terminal access information including information on the access timing; and a transmission unit configured to transmit the terminal access information and beacon frames to the terminals, wherein the terminals access the AP and transmit data frames to the AP, at the access timing based on the beacon frames.
    Type: Application
    Filed: March 13, 2017
    Publication date: June 29, 2017
    Inventors: Hee-Jung YU, Min-Ho CHEONG, Sok-Kyu LEE