公开(公告)号：US20190150194A1

公开(公告)日：2019-05-16

申请号：US16242804

申请日：2019-01-08

Applicant: LG ELECTRONICS INC.

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

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

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：US20190141696A1

公开(公告)日：2019-05-09

申请号：US16065744

申请日：2017-07-26

Applicant: LG Electronics Inc.

Inventor： Seonwook KIM ,  Yunjung YI ,  Joonkui AHN ,  Hanbyul SEO ,  Suckchel YANG ,  Kijun KIM

IPC: H04W72/04 ,  H04W4/70 ,  H04L5/00 ,  H04L1/18 ,  H04L5/14 ,  H03M13/13

Abstract: Disclosed are a method for transmitting uplink control information by a terminal in a wireless communication system and a device for supporting the same. More particularly, disclosed are a method for transmitting, by a terminal, uplink control information corresponding to downlink signals received from two base stations communicating with the terminal by different schemes when the two base stations are connected with the terminal by a dual connectivity method, and a device for supporting the same.

公开(公告)号：US20190132102A1

公开(公告)日：2019-05-02

申请号：US16308359

申请日：2017-06-12

Applicant: LG ELECTRONICS INC.

Inventor： Kyuhwan KWAK ,  Suckchel YANG ,  Seonwook KIM ,  Yunjung YI ,  Daesung HWANG

IPC: H04L5/00

Abstract: Disclosed are a method for transmitting an uplink control channel in a wireless communication system and an apparatus for the same. Particularly, the method comprises the steps of: receiving allocation of a resource region including one or more symbols for transmission of an uplink control channel; and mapping uplink control information and a reference signal to each specific resource group unit in the allocated resource region, wherein the specific resource group unit may comprise a first resource element having the reference signal mapped thereto and second resource elements having the at least one piece of uplink control information mapped thereto, the second resource elements may be arranged adjacent to the first resource element, and the second resource elements may be multiplexed according to orthogonal cover codes in a clockwise or counter-clockwise direction.

公开(公告)号：US20190053274A1

公开(公告)日：2019-02-14

申请号：US16071744

申请日：2017-01-26

Applicant: LG ELECTRONICS INC.

Inventor： Seonwook KIM ,  Joonkui AHN ,  Byounghoon KIM

IPC: H04W74/08 ,  H04W72/14 ,  H04W72/12 ,  H04W74/00 ,  H04W48/16 ,  H04W16/14

Abstract: Disclosed are a method for transmitting a downlink signal by a terminal from a base station, in a licensed assisted access (LAA) system for execution of listen-before-talk (LBT) based signal transmission by a base station or a terminal, and a device for supporting same. More particularly, even if the terminal does not receive from the base station information which indicates that from N−1th subframe to Nth subframe is a partial subframe (a subframe configuration in which a downlink signal is transmitted only on some of the symbols of a subframe), the terminal receives a physical downlink control channel (PDCCH) comprising uplink scheduling information.

公开(公告)号：US20190052382A1

公开(公告)日：2019-02-14

申请号：US16160331

申请日：2018-10-15

Applicant: LG ELECTRONICS INC.

Inventor： Seonwook KIM ,  Seungmin LEE ,  Kijun KIM ,  Hanbyul SEO ,  Byounghoon KIM

IPC: H04B17/345 ,  H04W24/10 ,  H04W72/12

CPC classification number: H04B17/345 ,  H04L5/00 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0073 ,  H04L5/0094 ,  H04W16/14 ,  H04W24/10 ,  H04W72/1289 ,  H04W76/15

Abstract: A method for transmitting channel state information (CSI) on a transmission opportunity (TxOP) duration by a user equipment (UE) in a wireless communication system supporting a unlicensed band, includes measuring CSI of the TxOP duration based on CSI interference measurement (CSI-IM) and/or CSI reference signal (CSI-RS) in one or more time intervals via the unlicensed band, wherein the one or more time intervals are determined based on a starting point of the TxOP duration; and transmitting the CSI to a base station.

公开(公告)号：US20190045505A1

公开(公告)日：2019-02-07

申请号：US16068595

申请日：2017-01-09

Applicant: LG ELECTRONICS INC.

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

IPC: H04W72/04 ,  H04W72/12

Abstract: The present invention relates to a wireless communication system and, more particularly, to a method and an apparatus therefor, the method comprising the steps of: receiving a DCI including UL scheduling information for a plurality of subframes, wherein the DCI further includes SRS request information; and transmitting, according to the request indicated by the SRS request information, an SRS through a predetermined subframe among the plurality of subframes only one time, wherein the predetermined subframe includes the first subframe in which UL transmission is scheduled or the last subframe in which UL transmission is scheduled, among the plurality of subframes.

公开(公告)号：US20190037586A1

公开(公告)日：2019-01-31

申请号：US16100872

申请日：2018-08-10

Applicant: LG Electronics Inc.

Inventor： Hanjun PARK ,  Suckchel YANG ,  Seonwook KIM

IPC: H04W72/12 ,  H04W72/04 ,  H04W72/14

Abstract: Disclosed herein are a method for transmitting and receiving uplink control information between a terminal and a base station in a wireless communication system and devices supporting the same.Particularly, disclosed herein are a method for transmitting and receiving uplink control information between a terminal and a base station on a physical uplink shared channel (PUSCH) without data (e.g., UL-SCH) and operation of devices supporting the same.

公开(公告)号：US20180278355A1

公开(公告)日：2018-09-27

申请号：US15760587

申请日：2016-09-19

Applicant: LG ELECTRONICS INC.

Inventor： Seokmin SHIN ,  Yunjung YI ,  Seonwook KIM ,  Bonghoe KIM

IPC: H04J11/00 ,  H04W56/00 ,  H04W72/04 ,  H04L5/00 ,  H04L12/18

CPC classification number: H04J11/0069 ,  H04L5/0048 ,  H04L12/189 ,  H04L27/2613 ,  H04L27/2692 ,  H04W56/001 ,  H04W72/0446

Abstract: A cell search method of a terminal in a wireless communication system, comprises: a step of receiving a narrow band synchronization signal through a narrow band from a base station; and a step of acquiring time synchronization and frequency synchronization with the base station on the basis of the narrow band synchronization signal and detecting an identifier of the base station, wherein the narrow band has a system bandwidth of 180 kHz and includes twelve carriers arranged at intervals of 15 kHz, and the narrow band synchronization signal consists of a first narrow band synchronization signal and a second narrow band synchronization signal, wherein the first narrow band synchronization signal can be transmitted in a sixth subframe of a radio frame and the second narrow band synchronization signal can be transmitted in a tenth subframe of the radio frame.

公开(公告)号：US20180270757A1

公开(公告)日：2018-09-20

申请号：US15761295

申请日：2016-09-23

Applicant: LG ELECTRONICS INC.

Inventor： Joonkui AHN ,  Kijun KIM ,  Hanbyul SEO ,  Jonghyun PARK ,  Hanjun PARK ,  Seonwook KIM

IPC: H04W52/02 ,  H04W16/14 ,  H04W72/04 ,  H04W56/00

Abstract: Provided are a method for discontinuous reception (DRX) in an unlicensed band, and a device using the same. The device is converted from a sleep state to an active state, and attempts downlink synchronization during a synchronization period. If the device does not obtain the downlink synchronization during the synchronization period, downlink data is received in the unlicensed band on the assumption that the modulation order of the downlink data scheduled in the active state is not greater than a specific value.

公开(公告)号：US20180242164A1

公开(公告)日：2018-08-23

申请号：US15753840

申请日：2016-08-22

Applicant: LG ELECTRONICS INC.

Inventor： Seungmin LEE ,  Joonkui AHN ,  Hanjun PARK ,  Seonwook KIM

IPC: H04W16/14 ,  H04W72/04 ,  H04W74/08 ,  H04L5/00 ,  H04L1/04

CPC classification number: H04W16/14 ,  H04L1/0026 ,  H04L1/0031 ,  H04L1/04 ,  H04L5/001 ,  H04L5/0048 ,  H04L5/0053 ,  H04W72/0406 ,  H04W74/0808

Abstract: Provided are a method for determining a valid subframe for cell in a non-licensed band in a wireless communication system, and a wireless apparatus using the method. The method comprises: determining whether all orthogonal frequency division multiplexing (OFDM) symbols of the cell are usable; and when all of the OFDM symbols of the subframe are usable, determining whether the subframe is a valid subframe based on whether a channel state information-reference signal (CSI-RS) resource is present in the subframe.