公开(公告)号：US20200296764A1

公开(公告)日：2020-09-17

申请号：US16892200

申请日：2020-06-03

Applicant: LG ELECTRONICS INC.

Inventor： Seonwook KIM ,  Joonkui AHN ,  Suckchel YANG ,  Kijun KIM ,  Byounghoon KIM ,  Hanbyul SEO ,  Hanjun PARK ,  Daesung HWANG

IPC: H04W74/08 ,  H04W74/00 ,  H04L1/18

Abstract: The present invention relates to a wireless access system that supports an unlicensed band, and provides various methods for adjusting a contention window size and devices for supporting the same. As an embodiment of the present invention, a method for adjusting a contention window size (CWS) in a wireless access system supporting an unlicensed band may comprise the steps of: performing a channel access procedure; when, as a result of performing the channel access procedure, it is determined that a serving cell (Scell) in the unlicensed band is in an idle state, transmitting a transmission burst including a downlink signal; receiving HARQ-ACK information corresponding to the transmission burst; and adjusting the CWS on the basis of the HARQ-ACK information corresponding to the first subframe of the transmission burst.

公开(公告)号：US20200296750A1

公开(公告)日：2020-09-17

申请号：US16884641

申请日：2020-05-27

Applicant: LG ELECTRONICS INC.

Inventor： Seonwook KIM ,  Joonkui AHN ,  Hanjun PARK ,  Byounghoon KIM

IPC: H04W72/12 ,  H04W74/00 ,  H04L1/18 ,  H04L1/00 ,  H04W74/08

Abstract: The present invention relates to a radio access system that supports an unlicensed band, and provides methods for controlling a contention window size (CWS) for performing uplink LBT, methods for effectively utilizing a radio resource even when an uplink data transmission fails, and apparatuses supporting the same. As an embodiment of the present invention, a method for controlling a contention window size (CWS) for transmitting uplink data in a radio access system supporting an unlicensed band by a user equipment, may comprise the steps of: receiving, from an evolved node B, a radio signal including CSW control information indicating information required for controlling a CWS; controlling the CWS on the basis of the CWS control information; performing a listen before talk (LBT) process using the controlled CWS; and transmitting uplink data when a result of the LBT process shows that an unlicensed band is in an idle state.

公开(公告)号：US20200260482A1

公开(公告)日：2020-08-13

申请号：US16863846

申请日：2020-04-30

Applicant: LG ELECTRONICS INC.

Inventor： Seonwook KIM ,  Joonkui AHN ,  Suckchel YANG ,  Kijun KIM ,  Byounghoon KIM ,  Hanbyul SEO ,  Hanjun PARK ,  Daesung HWANG

IPC: H04W74/08 ,  H04L1/00 ,  H04L1/18 ,  H04L5/00 ,  H04W76/28 ,  H04W28/02 ,  H04W28/26

Abstract: The present invention relates to a wireless access system that supports an unlicensed band, and provides various methods for adjusting a contention window size, methods for determining the time when the adjusted contention window size is applied, methods for distinguishing between a collision and a channel error, and devices for supporting the same. As an embodiment of the present invention, a method for adjusting a contention window size in a wireless access system supporting an unlicensed band may comprise the steps of: performing a channel access procedure; when it is determined through the performed channel access procedure that a serving cell (Scell) in the unlicensed band is in an idle state, transmitting a transmission burst including a downlink signal through the unlicensed band; receiving hybrid automatic repeat and request acknowledgment (HARQ-ACK) information corresponding to the transmission burst; and adjusting the CWS using the number of DTX states in the HARQ-ACK information when the transmission burst is scheduled in a self-carrier scheduling scheme.

公开(公告)号：US20200252888A1

公开(公告)日：2020-08-06

申请号：US16858012

申请日：2020-04-24

Applicant: LG Electronics Inc.

Inventor： Joonkui AHN ,  Sukhyon YOON ,  Suhwan LIM ,  Suckchel YANG ,  Jonghyun PARK ,  Changhwan PARK ,  Seonwook KIM

IPC: H04W52/36 ,  H04W52/14 ,  H04W52/24 ,  H04W52/28 ,  H04W52/44 ,  H04W52/54 ,  H04W72/12

Abstract: Provided are a method for reporting a power headroom and an apparatus using the same. The apparatus computes and reports a power headroom for a physical uplink shared channel (PUSCH) that is transmitted in a first transmission period of a first band having a first subcarrier interval. The power headroom is computed on the basis of at least one second transmission interval of a second band having a second subcarrier interval which overlaps with the first transmission interval.

公开(公告)号：US20200221481A1

公开(公告)日：2020-07-09

申请号：US16638032

申请日：2018-08-10

Applicant: LG Electronics Inc.

Inventor： Changhwan PARK ,  Seonwook KIM ,  Seokmin SHIN ,  Joonkui AHN ,  Suckchel YANG ,  Seunggye HWANG

IPC: H04W72/12 ,  H04W72/04 ,  H04W4/80

Abstract: The present invention relates to a wireless communication system, and specifically, to a method and a device therefor, the method comprising the steps of: repeatedly receiving a PDCCH including scheduling information, wherein the scheduling information includes time delay information; and repeatedly transmitting a PUSCH indicated by the scheduling information, after a time point indicated by the time delay information from the time point when the repeated receiving of the PDCCH ends, wherein a time resource in a time region includes a fixed DL time unit having a transmission direction fixed to a DL, and a time resource includes a fixed uplink (UL) time unit having a transmission direction fixed to a UL, and a floating time unit having a variable transmission direction, and the time point indicated by the time delay information is calculated on the basis of the fixed UL time unit.

公开(公告)号：US20200163126A1

公开(公告)日：2020-05-21

申请号：US16747774

申请日：2020-01-21

Applicant: LG Electronics Inc.

Inventor： Suckchel YANG ,  Joonkui AHN ,  Hanjun PARK ,  Seonwook KIM

IPC: H04W74/08 ,  H04L1/18 ,  H04L5/00 ,  H04W72/04 ,  H04W72/12 ,  H04W72/14 ,  H04L25/02 ,  H04B7/06 ,  H04W76/27 ,  H04W76/28

Abstract: The present invention relates to a wireless communication system, and specifically, to a method and a device for the method which comprises the steps of: receiving a PDCCH including uplink scheduling information; and transmitting, at a UL SF, a PUSCH indicated by the uplink scheduling information, wherein, if the PDCCH requests a transmission of an ACK, the PUSCH includes ACK information about a SF set corresponding to the UL SF, wherein the SF set includes a plurality of SFs.

公开(公告)号：US20200162204A1

公开(公告)日：2020-05-21

申请号：US16748579

申请日：2020-01-21

Applicant: LG ELECTRONICS INC.

Inventor： Dongyoun SEO ,  Joonkui AHN ,  Suckchel YANG ,  Yunjung YI ,  Daesung HWANG

IPC: H04L1/18 ,  H04W72/04 ,  H04L5/14 ,  H04W76/19 ,  H04W74/00 ,  H04L5/00 ,  H04B7/155 ,  H04W48/12 ,  H04W16/32

Abstract: Provided are a method for determining the number of hybrid automatic repeat request (HARQ) processes in a carrier aggregated system configured with a plurality of serving cells, and an apparatus using such a method. The method receives data from a downlink subframe of a second serving cell, and transmits an ACK/NACK signal for the data from an uplink subframe of a first serving cell, wherein the first serving cell uses a first-type frame, the second serving cell uses a second-type frame, and the number of HARQ processes in the second serving cell are determined with respect to each subframe comprised in the second-type frame and on the basis of the number of downlink subframes comprised in each section comprising a set number of subframes.

公开(公告)号：US20200100287A1

公开(公告)日：2020-03-26

申请号：US16698803

申请日：2019-11-27

Applicant: LG ELECTRONICS INC.

Inventor： Joonkui AHN ,  Byounghoon KIM ,  Suckchel YANG ,  Yunjung YI ,  Seonwook KIM

IPC: H04W74/08 ,  H04W56/00 ,  H04W16/14

Abstract: Provided are a method for performing a random access process in an unlicensed band, and a device using the same. The device receives a random access preamble (RAP) order instructing the transmission of a RAP. The device performs a clear channel assessment (CCA) in an unlicensed cell during an RAP window so as to transmit the RAP when the device succeeds in CCA.

公开(公告)号：US20200068619A1

公开(公告)日：2020-02-27

申请号：US16610597

申请日：2018-05-04

Applicant: LG Electronics Inc.

Inventor： Jaehyung KIM ,  Joonkui AHN ,  Suckchel YANG ,  Changhwan PARK ,  Seokmin SHIN ,  Seunggye HWANG

IPC: H04W74/08 ,  H04W74/00

Abstract: The present invention relates to a method for performing a random access procedure in a wireless communication system and a device therefor, the method comprising a step for receiving NPRACH configuration information and a step for transmitting a random access preamble on the basis of the NPRACH configuration information, wherein the NPRACH configuration information includes information indicating whether only a first preamble format is supported, only a second preamble format is supported, or both the first preamble format and the second preamble format are supported. If both the first preamble format and the second preamble format are supported according to the NPRACH configuration information and a specific condition is met, the random access preamble is transmitted using the first preamble format, and, if both the first preamble format and the second preamble format are supported according to the NPRACH configuration information and the specific condition is not met, the random access preamble is transmitted using the second preamble format.

公开(公告)号：US20200068511A1

公开(公告)日：2020-02-27

申请号：US16672378

申请日：2019-11-01

Applicant: LG ELECTRONICS INC.

Inventor： Suckchel YANG ,  Joonkui AHN ,  Seungmin LEE ,  Seonwook KIM

IPC: H04W52/36 ,  H04W72/04 ,  H04W16/14 ,  H04L27/26 ,  H04L1/18 ,  H04L5/14 ,  H04B7/06 ,  H04W52/38 ,  H04W52/34 ,  H04W52/28 ,  H04W52/14 ,  H04L5/00 ,  H04B7/26

Abstract: The present invention provides a method and a device for controlling uplink transmission on a first cell set in a licensed band and a second cell set in an unlicensed band. In one embodiment of the present invention, when the sum of transmission power required for the first cell and transmission power required for the second cell exceeds maximum power set in user equipment, the transmission power is preferentially allocated to the first cell over the second cell, and the uplink transmission is performed on the first cell within the residual power or the uplink transmission is omitted or dropped.