公开(公告)号：US10136450B2

公开(公告)日：2018-11-20

申请号：US15328858

申请日：2015-07-28

Applicant: LG ELECTRONICS INC.

Inventor： Wookbong Lee ,  Kiseon Ryu ,  Jeongki Kim ,  Jinsoo Choi ,  Hangyu Cho

IPC: H04W74/00 ,  H04W74/08 ,  H04W84/12 ,  H04L5/00

Abstract: An embodiment of the present invention relates to a method for performing a clear channel assessment (CCA) by STA in a wireless communication system, the method comprising the steps of: receiving a frame including a coloring bit; changing a CCA level to a first level when the coloring bit indicates a basic service set (BSS) to which the STA belongs, and changing a CCA level to a second level when the coloring bit indicates a BSS to which the STA does not belong; and performing the CCA according to the first level or the second level, wherein when the frame has an OFDM-based format, the frame includes a coloring disable bit, and when the coloring disable bit indicates that the frame is a multiuser transmission-related trigger frame, the STA does not perform a change of the CCA level without regard to information indicated by the coloring bit.

公开(公告)号：US10104620B2

公开(公告)日：2018-10-16

申请号：US15315332

申请日：2015-02-06

Applicant: LG ELECTRONICS INC.

Inventor： Giwon Park ,  Kiseon Ryu ,  Jeongki Kim ,  Hangyu Cho ,  Suhwook Kim

IPC: H04W52/02 ,  H04L5/00 ,  H04W84/12

Abstract: Disclosed are a method and a device for operation based on a power save mode in a WLAN. The method for operation based on a power save mode in a WLAN may comprise steps in which: an STA receives an ACK frame from an AP in response to a PS-poll frame; after receiving the ACK frame, the STA receives a different BSS PPDU before receiving a downlink frame from the AP; and the STA determines whether or not to switch to a doze state from an awake state on the basis of the reception strength of the different BSS PPDU.

公开(公告)号：US10097250B2

公开(公告)日：2018-10-09

申请号：US15302924

申请日：2015-03-24

Applicant: LG ELECTRONICS INC.

Inventor： Jinsoo Choi ,  Jinyoung Chun ,  Wookbong Lee ,  Dongguk Lim ,  Hangyu Cho

IPC: H04B7/0452 ,  H04L27/26 ,  H04L5/00 ,  H04B1/02 ,  H04L29/08 ,  H04W84/12

Abstract: Provided are a method for transmitting data and a device using the same in a wireless LAN. A transmitter transmits a physical layer protocol data unit (PPDU) in a transmission bandwidth. The PPDU includes a first part to which a first fast Fourier transform (FFT) size is applied, and a second part to which a second FFT size is applied. The number of pilots of the second part is identical to the number of pilots of the first part, and the pilot frequency location of the second part is identical to the pilot frequency location of the first part.

公开(公告)号：US10091726B2

公开(公告)日：2018-10-02

申请号：US15110688

申请日：2015-01-12

Applicant: LG ELECTRONICS INC.

Inventor： Giwon Park ,  Kiseon Ryu ,  Jeongki Kim ,  Hangyu Cho ,  Suhwook Kim

IPC: H04W84/12 ,  H04W52/02

Abstract: Disclosed are a method and an apparatus for operating based on a power save mode in a wireless LAN. The method for operating based on the power save mode in a wireless LAN may comprise the steps of: switching an STA from a sleep mode to an active mode after the STA has been switched to a power save mode based on a listen interval, to receive a first beacon frame transmitted by an AP; monitoring a frame for the STA transmitted by the AP until a timer started when the STA is switched to the active mode expires, when the first beacon frame indicates data buffered for the STA; and switching the STA to the sleep mode after the timer expires, wherein the timer can be reset when the frame is transmitted.

公开(公告)号：US10080240B2

公开(公告)日：2018-09-18

申请号：US15119346

申请日：2014-12-17

Applicant: LG ELECTRONICS INC.

Inventor： Jinsoo Choi ,  Kiseon Ryu ,  Wookbong Lee ,  Jinyoung Chun ,  Dongguk Lim ,  Hangyu Cho

IPC: H04W4/00 ,  H04W74/08 ,  H04W52/14 ,  H04W72/04 ,  H04W84/12

CPC classification number: H04W74/0816 ,  H04W52/143 ,  H04W72/0453 ,  H04W84/12

Abstract: A device and method for transmitting a frame in a wireless LAN, with the method including the steps of: transmitting, by an AP, an RTS frame for medium protection to a first STA set; receiving, by the AP, CTS frames, in sequence, from each of a plurality of STAs included in a second STA set in response to the RTS frame, the second STA set being included in the first STA set; and transmitting, by the AP, each of a plurality of PPDUs to each of the plurality of STAs via each of a plurality of subbands for each of the plurality of STAs on an overlapping time resource.

公开(公告)号：US10063359B2

公开(公告)日：2018-08-28

申请号：US15246104

申请日：2016-08-24

Applicant: LG ELECTRONICS INC.

Inventor： Suhwook Kim ,  Kiseon Ryu ,  Jeongki Kim ,  Hangyu Cho

IPC: H04W84/12 ,  H04L5/00 ,  H04L1/16 ,  H04L1/00

Abstract: An ACK signal processing method that can be used in a wireless LAN system is proposed. Various information that can be used for a downlink MU PPDU for multiple receiving stations may be proposed, and, for example, in order to omit the re-transmission of the related art, information requesting an ACK or Block ACK corresponding to previously transmitted data may be included. If an immediate acknowledgement (ACK) frame fails to be received after the MU-PPDU is transmitted from the AP, a Block ACK may be requested. In this case, while a Block ACK is requested, a radio resource through which a Block ACK is delivered may be allocated.

公开(公告)号：US10045338B2

公开(公告)日：2018-08-07

申请号：US15532365

申请日：2015-12-01

Applicant: LG ELECTRONICS INC.

Inventor： Dongguk Lim ,  Jinyoung Chun ,  Hangyu Cho ,  Wookbong Lee ,  Jinsoo Choi ,  Eunsung Park

IPC: H04W72/04 ,  H04L5/00 ,  H04W72/08 ,  H04W72/00 ,  H04L12/801 ,  H04L12/54

Abstract: A method for resource allocation in a wireless LAN system according to an embodiment of the present invention is characterized in that an access point (AP) sends a frame comprising a signaling field and a data field to one or more stations, wherein the signaling field comprises a first signaling field (SIG A field) including first common control information for the one or more stations and a second signaling field (SIG B field) including individual control information for each of the one or more stations, wherein the second signaling field includes resource allocation information for data transmission to the one or more stations, and wherein the resource allocation information comprises resource allocation information for data to be transmitted in a frequency band different from a frequency band in which the second signaling field (SIG B field) is transmitted.

公开(公告)号：US20180213558A1

公开(公告)日：2018-07-26

申请号：US15578420

申请日：2016-06-09

Applicant: LG ELECTRONICS INC.

Inventor： Jeongki Kim ,  Kiseon Ryu ,  Hangyu Cho ,  Jinmin Kim

IPC: H04W74/08

CPC classification number: H04W74/08 ,  H04W74/006 ,  H04W84/12

Abstract: A method for managing a NAV (network allocation vector) by a station (STA) in a wireless communication LAN system according to an embodiment of the present invention comprises the steps of: receiving a frame including duration information; and changing a NAV timer of the STA on the basis of the duration information of the frame. When an event occurs for a reset of the NAV timer, the STA may determine whether to reset the NAV timer in consideration of the remaining time that existed in the NAV timer right before the NAV timer was changed.

公开(公告)号：US10034242B2

公开(公告)日：2018-07-24

申请号：US15324667

申请日：2015-06-10

Applicant: LG ELECTRONICS INC.

Inventor： Giwon Park ,  Kiseon Ryu ,  Jeongki Kim ,  Hangyu Cho ,  Suhwook Kim

IPC: H04W52/02 ,  H04L5/00 ,  H04W72/04 ,  H04L12/18 ,  H04W84/12

Abstract: Disclosed are a method and an apparatus for power save mode operation on the basis of a frame transmitted from another BSS in a wireless LAN. A method for operating an STA in a wireless LAN in a power save mode comprises: a step in which the STA receives a beacon frame from an AP, the beacon frame comprising a TIM element indicating downlink data pending in the STA; a step in which the STA transmits a PS-poll frame to the AP in response to the beacon frame; a step in which the STA receives, from the AP, an ACK frame transmitted by the AP in response to the PS-poll frame; and a step in which the STA determines the operation of the another BSS in a TXOP power save mode on the basis of the ACK frame.

公开(公告)号：US20180176066A1

公开(公告)日：2018-06-21

申请号：US15580598

申请日：2016-03-11

Applicant: LG ELECTRONICS INC.

Inventor： Dongguk Lim ,  Jinsoo Choi ,  Hangyu Cho ,  Eunsung Park ,  Wookbong Lee

IPC: H04L27/26 ,  H04L25/02 ,  H04L1/18 ,  H04L27/20

CPC classification number: H04L27/2675 ,  H04B7/0452 ,  H04L1/00 ,  H04L1/0031 ,  H04L1/0038 ,  H04L1/0052 ,  H04L1/08 ,  H04L1/1819 ,  H04L5/0048 ,  H04L5/0094 ,  H04L25/0204 ,  H04L25/0224 ,  H04L27/206 ,  H04L27/26 ,  H04L27/2602 ,  H04L2025/0377 ,  H04W84/12

Abstract: A method for receiving a signal by a station (STA) in a wireless LAN system according to an embodiment of the present invention comprises the steps of: receiving a multi-user (MU) frame including a SIG-A field, a SIG-B field and a short training field (STF), and a long training field (LTF) that provides training symbols; and performing blind-decoding of the SIG-B field using a group ID assigned to the STA, wherein the SIG-B field includes information on the number of streams assigned to each of multiple stations that receive the MU frame, and the starting position of a training symbol interval for the STA in the LTF is implicitly indicated by the number of streams assigned to each of other stations in the same group, which share the group ID with the STA, and the order in which the streams are assigned to the STA in the same group.