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).

  • Memory system having lower pages and upper pages performing status read operation and method of operating the same
    Patent number: 9691448
    Abstract: A method of operating a controller includes, determining whether an address corresponding to a program operation indicates a lower page or an upper page; waiting for a first waiting time for the program operation to the lower page when the address indicates the lower page; waiting for a second waiting time for the program operation to the upper page when the address indicates the upper page, wherein the second waiting time is longer than the first waiting time; and performing a status read operation on the semiconductor memory device after one of the first waiting time or the second waiting time.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: June 27, 2017
    Assignee: SK Hynix Inc.
    Inventors: Young Dong Roh, Sok Kyu Lee
  • Method for allocating resources in wireless LAN system and wireless LAN system
    Patent number: 9693362
    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: Grant
    Filed: November 29, 2013
    Date of Patent: June 27, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jae Seung Lee, Min Ho Cheong, Hyoung Jin Kwon, Sok Kyu Lee, Wun Cheol Jeong, Chang Sub Shin, Cheol Sig Pyo
  • Method and apparatus for efficient aggregation scheduling in wireless local area network (WLAN) system
    Patent number: 9674860
    Abstract: Provided is a method and apparatus for efficient aggregation scheduling in a wireless local area network (WLAN) system, the apparatus including a delay setting unit to set a required delay time for each access category (AC), a storing unit to store a traffic identification (TID) of a packet in a queue of a corresponding AC when the packet arrives, a delay time calculator to calculate a maximum delay time predicted when the packet arriving at the queue is configured to be an A-MPDU and the configured A-MPDU is transmitted, and an A-MPDU configuring unit to compare the calculated maximum delay time and the required delay time, and configure a corresponding A-MPDU when the calculated maximum delay time is greater than the required delay time.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: June 6, 2017
    Assignee: Electronics and Telecommunications Research Insitute
    Inventors: Hyun Gu Park, Sok Kyu Lee
  • Physical layer low power communication method and apparatus
    Patent number: 9668212
    Abstract: A physical layer low power communication method and apparatus are provided. The physical layer low power communication method may include receiving a data packet from a transmitter, measuring a channel quality using a preamble and signal field information included in the data packet and determining whether recovery of the data packet is possible, calculating an error generation rate according to a determination result, and discarding the data packet and operating in a power save mode when the error generation rate is higher than a predetermined reference.
    Type: Grant
    Filed: September 16, 2014
    Date of Patent: May 30, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Il Gu Lee, Jeong Chul Shin, Hee Soo Lee, Sok Kyu Lee
  • Apparatus for transmitting and receiving data to provide high-speed data communication and method thereof
    Patent number: 9661528
    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: Grant
    Filed: January 30, 2015
    Date of Patent: May 23, 2017
    Assignee: ELECTRONIC AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Hee-Jung Yu, Taehyun Jeon, Myung-Soon Kim, Eun-Young Choi, Sok-kyu Lee, Deuk-Su Lyu
  • Method and apparatus for guaranteeing traffic quality of communication module in wireless communication system
    Patent number: 9641412
    Abstract: Provided is a communication control apparatus for controlling data transmission performed by a first communication module and a second communication module, each using a different communication scheme, the apparatus including a receiver to receive traffic information associated with the first communication module, an operating unit to calculate, based on the traffic information, a slack time, starting from a first point in time and ending at a second point in time at which traffic relating to the first communication module occurs, and a transmitter to transmit the slack time to the second communication module, wherein the first point in time is a point in time at which the second communication module requests the slack time from the communication control apparatus in order to transmit data.
    Type: Grant
    Filed: March 20, 2015
    Date of Patent: May 2, 2017
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Hong Soog Kim, Sok Kyu Lee
  • Method and apparatus for transceiving data in a MIMO system
    Patent number: 9634746
    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: Grant
    Filed: October 19, 2015
    Date of Patent: April 25, 2017
    Assignee: Electronics and Telecommunications Research Institute
    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
  • Apparatus and method for transmitting/receiving data in communication system
    Patent number: 9629168
    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: Grant
    Filed: April 20, 2015
    Date of Patent: April 18, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Hee-Jung Yu, Min-Ho Cheong, Sok-Kyu Lee
  • Method and system for managing channel in wireless local area network
    Patent number: 9622218
    Abstract: A method and system for managing a channel in a wireless local area network is disclosed. The method includes detecting adjacent access points, transmitting a resource allocation request frame including candidate channel information which the first access points wants to a master access point among the detected adjacent access points, receiving a resource allocation response frame which is a response with respect to the resource allocation request frame from the master access point, and configuring the BSS based on channel related information included in the resource allocation response frame. Accordingly, performance of the wireless local area network can be improved.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: April 11, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jae Seung Lee, Hyoung Jin Kwon, Min Ho Cheong, Sok Kyu Lee
  • Data transmission method and apparatus
    Patent number: 9584433
    Abstract: Provided is a data transmission apparatus including a queue management unit to manage at least one queue in which information associated with at least one buffer descriptor (BD) is stored, a scheduler to estimate information to be transmitted among information associated with at least one media access control (MAC) protocol data unit (MPDU) using at least one transmission bitmap (Tx bitmap), a data transmitter to read the estimated information from information associated with a BD indicated in the at least one Tx bitmap, and transmit the read information to a physical layer, and a physical layer management unit to generate information associated with a presentation protocol data unit (PPDU) based on the transmitted information, and transmit the generated information over the air, wherein the at least one BD includes information associated with the at least one MPDU.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: February 28, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jae Woo Park, Jee Yon Choi, Sok Kyu Lee
  • Method of allocating slot and accessing channel in wireless local area network (WLAN)
    Patent number: 9585146
    Abstract: A method of assigning a slot and accessing a channel in a wireless local area network (WLAN) is provided. A station may attempt to access a channel based on a plurality of candidate slots assigned to the station.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: February 28, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Joon Soo Lee, Sok Kyu Lee
  • PACKET MODE AUTO-DETECTION IN MULTI-MODE WIRELESS COMMUNICATION SYSTEM, SIGNAL FIELD TRANSMISSION FOR THE PACKET MODE AUTO-DETECTION, AND GAIN CONTROL BASED ON THE PACKET MODE
    Publication number: 20170026212
    Abstract: A method for automatically detecting a packet mode in a wireless communication system supporting a multiple transmission mode includes: acquiring at least one of data rate information, packet length information and channel bandwidth information from a transmitted frame; and determining the packet mode on the basis of the phase rotation check result of a symbol transmitted after a signal field signal and at least one of the data rate information, the packet length information and the channel bandwidth information acquired from the transmitted frame.
    Type: Application
    Filed: October 7, 2016
    Publication date: January 26, 2017
    Inventors: Il-Gu LEE, Eun-Young CHOI, Sok-Kyu LEE
  • MEMORY SYSTEM PERFORMING STATUS READ OPERATION AND METHOD OF OPERATING THE SAME
    Publication number: 20160379689
    Abstract: A method of operating a controller includes, determining whether an address corresponding to a program operation indicates a lower page or an upper page; waiting for a first waiting time for the program operation to the lower page when the address indicates the lower page; waiting for a second waiting time for the program operation to the upper page when the address indicates the upper page, wherein the second waiting time is longer than the first waiting time; and performing a status read operation on the semiconductor memory device after one of the first waiting time or the second waiting time.
    Type: Application
    Filed: December 8, 2015
    Publication date: December 29, 2016
    Inventors: Young Dong ROH, Sok Kyu LEE
  • UPLINK MULTI-USER MULTIPLE-INPUT AND MULTIPLE-OUTPUT (UL MU-MIMO) TRANSMISSION REQUEST METHOD IN UL MU-MIMO COMMUNICATION
    Publication number: 20160366057
    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 transmitting, to each of a plurality of stations (STAs), an uplink multi-user request (UL MU request) frame requesting transmission of a data frame, and receiving, from each of the plurality of STAs, the data frame during an identical period of time based on an identical reception intensity, wherein the UL MU request frame includes at least one of information on a transmission time of the data frame and information on a reception intensity of the data frame in the AP.
    Type: Application
    Filed: August 25, 2016
    Publication date: December 15, 2016
    Inventors: Jee Yon CHOI, Jae Woo PARK, Hyoung Jin KWON, Sok Kyu LEE
  • MULTI-CHANNEL LOW POWER COMMUNICATION METHOD AND APPARATUS
    Publication number: 20160366647
    Abstract: A multi-channel low power communication method and apparatus are provided. The multi-channel low power communication method may include transmitting request to send (RTS) to a receiver through a plurality of communication channels, receiving clear to send (CTS) from the receiver in response to the RTS, and transmitting a data packet through part or entire of at least one communication channel having received the CTS among the plurality of communication channels, wherein at least one of the RTS and the CTS comprises a multi-channel power save information field related to multi-channel power save.
    Type: Application
    Filed: August 25, 2016
    Publication date: December 15, 2016
    Inventors: Il Gu LEE, Jung Bo SON, Hee Soo LEE, Sok Kyu LEE
  • Method and apparatus for transmitting beamforming report frame for transmit beamforming
    Patent number: 9520926
    Abstract: A method of transmitting a beamforming report frame for transmit beamforming is provided. The method may include acquiring, by a receiver, data of a signal transmitted by a transmitter, selecting either media access control (MAC) software or MAC hardware, to assign a sequence number based on a type of the data, and assigning a sequence number to the management frame based on the data, using either the MAC software or MAC hardware that is selected.
    Type: Grant
    Filed: April 9, 2014
    Date of Patent: December 13, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jee Yon Choi, Je Hun Lee, Sok Kyu Lee
  • Apparatus and method for controlling transmission schedule for buffered data in wireless LAN, and terminal for receiving buffered data based on transmission schedule in wireless LAN
    Patent number: 9516592
    Abstract: Disclosed is a technology that enables an access point, configured to manage a network, to control a transmission schedule of buffered data and enables a terminal to obtain information associated with the transmission schedule in a wireless local area network (WLAN) environment. An apparatus for controlling a transmission schedule of buffered data in a WLAN according to an embodiment may group terminals based on at least one of a service characteristic and a traffic characteristic of each of the terminals, assign group information to each of the grouped groups to wake up in a different time, and transmit at least one of delivery traffic indication map (DTIM) information and the buffered data based on the assigned group information.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: December 6, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Hyoung Jin Kwon, Jae Seung Lee, Min Ho Cheong, Hee Jung Yu, Sok Kyu Lee
  • POWER SAVING METHOD IN WIRELESS COMMUNICATION SYSTEM
    Publication number: 20160353391
    Abstract: A method and apparatus of accessing a channel in a wireless local area network is provided. A destination station receives a request to send (RTS) frame to allocate a network allocation vector from a source station over a first bandwidth and transmits a clear to send (CTS) frame over a second bandwidth to the source station in response to the RTS frame. The second bandwidth is dynamically determined when a first parameter has a predetermined value.
    Type: Application
    Filed: August 9, 2016
    Publication date: December 1, 2016
    Inventors: IL-GU LEE, Sok-Kyu LEE, Hyun-Kyu CHUNG, Dae-Sik KIM
  • METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING PACKET IN WIRELESS COMMUNICATION SYSTEM
    Publication number: 20160353411
    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: Application
    Filed: August 15, 2016
    Publication date: December 1, 2016
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Yun-Joo KIM, Sok-Kyu LEE
  • Method for protecting opportunity to transmit data frame in wireless LAN system
    Patent number: 9504065
    Abstract: A method for guaranteeing a data frame transmit opportunity in a wireless LAN system having three different transmission modes includes: setting a first transmission protection interval based on a lowest transmission mode, when a node of a mode having a lowest transmission rate among the three transmission modes exists in the wireless LAN system, aggregating a data frame to be transmitted within time of the set transmission protection interval, and transmitting the data frame; and setting a second transmission protection interval based on a mode having a highest transmission rate, when only nodes of a mode having a highest transmission rate among the three transmission modes exist, aggregating a data frame to be transmitted within time of the set transmission protection interval, and transmitting the data frame.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: November 22, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Il-Gu Lee, Sok-Kyu Lee