公开(公告)号：US11297636B2

公开(公告)日：2022-04-05

申请号：US16904556

申请日：2020-06-18

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC.

Inventor： Minseok Noh ,  Jinsam Kwak ,  Juhyung Son

IPC: H04L5/00 ,  H04W72/12 ,  H04L27/26 ,  H04L5/14 ,  H04W84/12 ,  H04W16/14 ,  H04W72/04 ,  H04W74/08 ,  H04W88/06

Abstract: Disclosed are a method, an apparatus, and a system for performing channel access. In detail, provided are a method including: receiving uplink scheduling information; and when the user equipment has stopped an uplink transmission during the uplink transmission being performed according to the uplink scheduling information, to resume the uplink transmission, performing a second type channel access when a channel sensed by the user equipment is continuously idle after the uplink transmission has been stopped, and performing a first type channel access when the channel sensed by the user equipment is not continuously idle after the uplink transmission has been stopped, wherein the first type channel access comprises performing a random backoff after a channel sensing, and the second type channel access only comprises performing a channel sensing and an apparatus and a system therefor.

公开(公告)号：US11283570B2

公开(公告)日：2022-03-22

申请号：US16844817

申请日：2020-04-09

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC. ,  SK TELECOM CO., LTD.

Inventor： Juhyung Son ,  Jinsam Kwak ,  Geonjung Ko

IPC: H04L5/00 ,  H04W72/04 ,  H04L27/26

Abstract: A wireless communication terminal is disclosed. The wireless communication terminal includes a transceiver configured to transmit/receive a wireless signal; and a processor configured to control an operation of the wireless communication terminal. The transceiver transmits a training signal to a base wireless communication terminal based on a sub-frequency band allocated from the base wireless communication terminal, and transmits data to the base wireless communication terminal through the sub-frequency band allocated from the base wireless communication terminal. The training signal is used, by the base wireless communication terminal, for receiving the data from the wireless communication terminal.

公开(公告)号：US11240166B2

公开(公告)日：2022-02-01

申请号：US16908335

申请日：2020-06-22

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC. ,  SK TELECOM CO., LTD.

Inventor： Jinsoo Ahn ,  Yongho Kim ,  Jinsam Kwak ,  Juhyung Son

IPC: H04L12/873 ,  H04W74/00 ,  H04L1/18 ,  H04L1/16 ,  H04L12/869 ,  H04L12/865 ,  H04W74/08 ,  H04W84/12

Abstract: The present invention relates to a wireless communication terminal and a wireless communication method for efficiently scheduling uplink multi-user transmission.
To this end, provided are a base wireless communication terminal, including: a transceiver configured to transmit and receive a wireless signal; and a processor configured to control an operation of the transceiver, wherein the processor selects an access category for transmitting a trigger frame which solicits an uplink multi-user transmission, performs a backoff procedure for transmitting the trigger frame based on the selected access category, and transmits the trigger frame when a backoff counter of the backoff procedure expires and a wireless communication method using the same.

公开(公告)号：US11196513B2

公开(公告)日：2021-12-07

申请号：US16851078

申请日：2020-04-16

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC. ,  SK TELECOM CO., LTD.

Inventor： Juhyung Son ,  Jinsam Kwak ,  Geonjung Ko ,  Woojin Ahn

IPC: H04L1/16 ,  H04L1/00 ,  H04L1/18 ,  H04L29/06 ,  H04L5/00 ,  H04W84/12 ,  H04W72/12 ,  H04L1/06 ,  H04L29/08

Abstract: Provided is a wireless communication terminal that communicates wirelessly. The terminal includes: a transceiver; and a processor. The processor is configured to receive a Downlink Multi-User (DL MU) PPDU including information for an Uplink Multi-User (UL MU) transmission from a base wireless communication terminal by using the transceiver, and transmit the UL MU PPDU to the base wireless communication terminal based on the information for UL MU transmission.

公开(公告)号：US11166040B2

公开(公告)日：2021-11-02

申请号：US17113215

申请日：2020-12-07

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC. ,  HUMAX CO., LTD.

Inventor： Geonjung Ko ,  Dongcheol Kim ,  Juhyung Son ,  Jaehong Jung ,  Jinsam Kwak

IPC: H04N19/513 ,  H04N19/53 ,  H04N19/57

Abstract: An apparatus for decoding a video signal, the apparatus comprising a processor, wherein the processor is configured to: configure a Motion Vector Prediction (MVP) candidate list for motion compensation of a current block through one of a first method and a second method, acquire a motion vector predictor of the current block, based on the configured MVP candidate list, acquire a motion vector differential value indicating a difference between a motion vector of the current block and the motion vector predictor, modify the motion vector differential value, based on a resolution of the motion vector differential value of the current block, acquire the motion vector of the current block, based on the motion vector predictor and the modified motion vector differential value, and reconstruct the current block, based on the acquired motion vector.

公开(公告)号：US11140718B2

公开(公告)日：2021-10-05

申请号：US16595405

申请日：2019-10-07

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC. ,  SK TELECOM CO., LTD.

Inventor： Woojin Ahn ,  Yongho Kim ,  Jinsam Kwak ,  Juhyung Son

IPC: H04W74/08 ,  H04W84/12 ,  H04W52/02 ,  H04W28/02 ,  H04W72/04

Abstract: The present invention relates to a wireless communication terminal and a wireless communication method for efficiently scheduling simultaneous uplink transmissions of a plurality of terminals.
To this end, provided are a wireless communication terminal, the terminal including: a transceiver; and a processor, wherein the processor receives, through the transceiver, a trigger frame transmitted by a base wireless communication terminal, and performs a multi-user uplink transmission based on the received trigger frame, wherein the trigger frame includes a predetermined field indicating whether an additional trigger frame is present or not, and a wireless communication method using the same.

公开(公告)号：US11140556B2

公开(公告)日：2021-10-05

申请号：US16812375

申请日：2020-03-09

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC. ,  SK TELECOM CO., LTD.

Inventor： Geonjung Ko ,  Juhyung Son ,  Jinsam Kwak ,  Woojin Ahn

IPC: H04W16/02 ,  H04W52/14 ,  H04W28/20 ,  H04W52/34 ,  H04W84/12 ,  H04W72/04 ,  H04W88/02 ,  H04W52/24 ,  H04W24/08

Abstract: The present invention relates to a wireless communication method and a wireless communication terminal for a spatial reuse operation of an overlapping basic service set, and more particularly, to a wireless communication method and a wireless communication terminal for supporting a spatial reuse operation of an overlapping basic service set to efficiently use a wireless resource. To this end, provided are a wireless communication terminal including: a processor; and a communication unit, wherein the processor receives a trigger frame indicating an uplink multi-user transmission, and transmits a trigger-based PHY protocol data unit (PPDU) in response to the received trigger frame, wherein the trigger-based PPDU comprises a spatial reuse parameter for spatial reuse operation of an overlapping basic service set (OBSS) terminal and a wireless communication method using the same.

公开(公告)号：US11102778B2

公开(公告)日：2021-08-24

申请号：US16399973

申请日：2019-04-30

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC. ,  SK TELECOM CO., LTD.

Inventor： Woojin Ahn ,  Yongho Kim ,  Jinsam Kwak ,  Juhyung Son

IPC: H04W72/04 ,  H04W84/12 ,  H04W74/08

Abstract: Provided is a wireless communication terminal including a transceiver for transmitting/receiving a wireless signal and a processor for controlling an operation of the wireless communication terminal. The transceiver receives a first frame indicating information on a resource that a base wireless communication terminal allocates to a plurality of wireless communication terminals from the base wireless communication terminal, and transmits data to the base wireless communication terminal based on the first frame. The plurality of wireless communication terminals include the wireless communication terminal.

公开(公告)号：US20210029722A1

公开(公告)日：2021-01-28

申请号：US17069863

申请日：2020-10-14

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC. ,  SK TELECOM CO., LTD.

Inventor： Jinsoo AHN ,  Woojin Ahn ,  Yongho Kim ,  Jinsam Kwak ,  Juhyung Son

IPC: H04W72/12 ,  H04W84/12 ,  H04W74/04 ,  H04L5/00 ,  H04L1/18 ,  H04L1/00 ,  H04W76/18 ,  H04W56/00 ,  H04W72/04

Abstract: The present invention relates to a wireless communication method for uplink multi-user transmission scheduling and a wireless communication terminal using the same. To this end, provided are a base wireless communication terminal comprising a processor and a transceiver, wherein the processor transmits a trigger frame soliciting an uplink multi-user transmission, determines whether the uplink multi-user transmission is successful based on received uplink multi-user data in response to the trigger frame, and retransmits the trigger frame when it is determined that the uplink multi-user transmission has failed and a wireless communication method using the same.

公开(公告)号：US10904927B2

公开(公告)日：2021-01-26

申请号：US16693203

申请日：2019-11-22

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC. ,  SK TELECOM CO., LTD.

Inventor： Geonjung Ko ,  Juhyung Son ,  Woojin Ahn ,  Jinsam Kwak

IPC: H04W74/08 ,  H04L5/00 ,  H04L27/26 ,  H04W72/04 ,  H04L1/00 ,  H04L1/16 ,  H04W28/06 ,  H04W74/00 ,  H04W84/12

Abstract: Provided is a wireless communication terminal that wirelessly communicates with a base wireless communication terminal. The wireless communication terminal includes a transceiver, and a processor. The processor is configured to set an integer selected from a range of 0 to a value equal to or smaller than an OFDMA Contention Window (OCW) as a counter for random access, receive a trigger frame for triggering random access using one or more resource units (RUs) allocated for the random access from the base wireless communication terminal using the transceiver, decrement a value of the counter based on the one or more RUs allocated for the random access, randomly select one RU based on the one or more RUs allocated for the random access when the value of the counter is 0 or reaches 0, and attempt transmission to the base wireless communication terminal using the selected RU.