公开(公告)号：US10187851B2

公开(公告)日：2019-01-22

申请号：US15315702

申请日：2015-02-26

Applicant: LG ELECTRONICS INC.

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

IPC: H04W52/02 ,  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 may comprise steps in which: an STA, which has been switched to an awake state, transmits a PS-poll frame to an AP on the basis of the transmission cycle of a beacon frame; the STA receives an ACK frame from the AP in response to the PS-poll frame; after receiving the ACK frame, the STA overhears a different BSS frame; and within a preset time upon overhearing the different BSS frame, the STA determines whether or not to maintain the awake state on the basis of whether or not a power management control frame has been transmitted from the AP.

公开(公告)号：US10158516B2

公开(公告)日：2018-12-18

申请号：US15303202

申请日：2015-03-23

Applicant: LG ELECTRONICS INC.

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

IPC: H04L27/26 ,  H04L5/00 ,  H04W84/12

Abstract: Provided are method for transmitting a data block in a wireless LAN and an apparatus using the same. 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 second FFT size increases by integer times as the size of the transmission bandwidth increases.

公开(公告)号：US10153877B2

公开(公告)日：2018-12-11

申请号：US15296997

申请日：2016-10-18

Applicant: LG ELECTRONICS INC.

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

IPC: H04L5/00 ,  H04W72/12 ,  H04W84/12

Abstract: Provides are a method and an apparatus for transmitting a feedback frame in a wireless local area network (WLAN) system. Specifically, a station (STA) receives, from an access point (AP), a null data packet announcement (NDPA) frame indicating transmission of a null data packet (NDP). The STA receives the NDP from the AP. The STA transmits, to the AP, a feedback frame including channel state information determined based on the NDP. The channel state information indicates a feedback subcarrier in each subcarrier group. The subcarrier group is generated based on grouping information using subcarriers in a frequency band excluding a guard subcarrier and a DC subcarrier. The feedback subcarrier is included in a subcarrier with an odd-numbered subcarrier index. The feedback subcarrier corresponds to a subcarrier with an even-numbered subcarrier index that is adjacent to the subcarrier with the odd-numbered subcarrier when the subcarrier with the odd-numbered subcarrier is a null subcarrier.

公开(公告)号：US10135662B2

公开(公告)日：2018-11-20

申请号：US15524873

申请日：2015-11-30

Applicant: LG ELECTRONICS INC.

Inventor： Kilbom Lee ,  Hangyu Cho ,  Wookbong Lee ,  Jinsoo Choi ,  Jiwon Kang

IPC: H04B1/16 ,  H04L27/26 ,  H04L27/38

Abstract: Disclosed is a sequence generation method comprising: generating a basic sequence structure including C48 having 48 tones, X6 having six tones, and X5 having five tones; selecting any one of a plurality of phase rotation factors predetermined for a bandwidth; and generating a sequence to be inputted into a preamble to be transmitted to a terminal, by using the phase rotation factor, applied in basic sequence structural units, and the basic sequence structure.

公开(公告)号：US10129911B2

公开(公告)日：2018-11-13

申请号：US15214388

申请日：2016-07-19

Applicant: LG ELECTRONICS INC.

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

IPC: H04L12/28 ,  H04W76/00 ,  H04W84/12

Abstract: A method for processing an uplink PPDU in a wireless LAN system is proposed herein. The uplink PPDU may correspond to a PPDU that is received from multiple users. In the receiving device, a first uplink MU PPDU may be received from a first user, and a second uplink MU PPDU may be received from a second user. In this case, CSD of an enhanced method may be applied to LTF signals respective to each of the first uplink MU PPDU and the second uplink MU PPDU. Additionally, an orthogonal mapping matrix may be applied to the LTF signals respective to each of the MU PPDUs as a method ensuring orthogonality between the streams.

公开(公告)号：US10128988B2

公开(公告)日：2018-11-13

申请号：US14912862

申请日：2014-04-29

Applicant: LG ELECTRONICS INC.

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

IPC: H04L1/18 ,  H04L5/00 ,  H04W84/12

Abstract: Disclosed are a method and an apparatus for reporting information about a transmission failure frame. The method for reporting information about a transmission failure frame in a wireless LAN may comprise the steps of: creating, by an STA, the retransmission frame includes information about the transmission failure frame, the information about the transmission failure frame includes timestamp information and duration information, the timestamp information includes information about the transmission start time of the transmission failure frame, and the duration information includes information about the transmission period of the transmission failure frame.

公开(公告)号：US10117272B2

公开(公告)日：2018-10-30

申请号：US15125083

申请日：2015-03-05

Applicant: LG ELECTRONICS INC.

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

IPC: H04W4/00 ,  H04L12/26 ,  H04W74/08 ,  H04L5/00 ,  H04W72/04 ,  H04W84/12 ,  H04W16/28 ,  H04W88/08 ,  H04W72/12

Abstract: The present disclosure relates to a wireless communication system, and in particular to a data transmission operation of an AP in a wireless LAN system. To this end, the AP may obtain information on a STA located at an overlapping basic service set (OBSS) from among STAs connected to the AP, and determines, based thereon, (1) whether to transmit data from the AP through a downlink oriented channel or a general channel different from the downlink oriented channel, or (2) whether to use one or more of a distributed coordination function (DCF) procedure and an enhanced distributed channel access (EDCA) procedure.

公开(公告)号：US10104617B2

公开(公告)日：2018-10-16

申请号：US15112665

申请日：2014-11-20

Applicant: LG ELECTRONICS INC.

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

IPC: H04W4/00 ,  H04W52/02 ,  H04W84/12

Abstract: A power save mode-based operating method and device in a WLAN are disclosed. The power save mode-based operating method in the WLAN may include: transmitting, by an STA, a first trigger frame to an AP; receiving, by the STA, a downlink frame transmitted by the AP based on the first trigger frame on a first service section; receiving, by the STA, traffic indication information from the AP on a second service section after the reception of the downlink frame; determining, by the STA, the presence or absence of a pending downlink frame at the AP based on the traffic indication information on the second service section; and determining, by the STA, a power saving mode based on the presence or absence of the pending downlink frame.

公开(公告)号：US10098110B2

公开(公告)日：2018-10-09

申请号：US15513873

申请日：2015-10-05

Applicant: LG ELECTRONICS INC.

Inventor： Jinsoo Choi ,  Hangyu Cho ,  Wookbong Lee

IPC: H04W72/04 ,  H04W72/12

Abstract: Disclosed are a method and an apparatus for allocating wireless resources based on a single resource unit in a WLAN. The method for allocating the wireless resources based on a single resource unit in a WLAN may comprise the steps of: an AP scheduling, on a bandwidth, a plurality of wireless resources for communication with a plurality of STAs; and the AP transmitting a plurality of items of downlink data to each of the plurality of STAs through each of the plurality of wireless resources, wherein when resource allocation based on a virtual allocation resource unit is not supported, each of the plurality of wireless resources can include at least one first resource unit only or at least one second resource unit only, wherein the size of the first resource unit can be larger than the size of the second resource unit.

公开(公告)号：US10038535B2

公开(公告)日：2018-07-31

申请号：US15302922

申请日：2015-02-16

Applicant: LG ELECTRONICS INC.

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

IPC: H04L5/00 ,  H04W84/12 ,  H04B7/0452 ,  H04B7/0417

CPC classification number: H04L5/005 ,  H04B7/0417 ,  H04B7/0452 ,  H04L5/001 ,  H04W84/12

Abstract: A method and apparatus for transmitting a frame on the basis of a sounding procedure is disclosed. The method for transmitting the frame on the basis of a sounding procedure in a wireless LAN may comprise the steps of: transmitting an NDPA frame to each of multiple STAs by an AP wherein the NDPA frame notifies of the transmission of NDP; transmitting the NDP to each of the multiple STAs by the AP; receiving, by the AP, multiple feedback frames transmitted through multiple transmission sources allocated to the multiple STAs in time sources overlapped by the multiple STAs, respectively; and transmitting, by the AP, multiple downlink frames to the multiple STAs respectively.