公开(公告)号：US09906281B2

公开(公告)日：2018-02-27

申请号：US14484079

申请日：2014-09-11

Applicant: LG ELECTRONICS INC.

Inventor： Yong Ho Seok ,  Bong Hoe Kim ,  Dae Won Lee

IPC: H04B7/04 ,  H04L25/02 ,  H04B7/0452 ,  H04B7/06 ,  H04B7/0456 ,  H04W84/12

CPC classification number: H04B7/0452 ,  H04B7/0456 ,  H04B7/0617 ,  H04B7/0632 ,  H04B7/0663 ,  H04L25/0224 ,  H04W84/12

Abstract: A Multi-User-Multiple Input Multiple Output (MU-MIMO) transmission method performed by an Access Point (AP) in a Wireless Local Area Network (WLAN) system is provided. The method includes transmitting an MU-MIMO initiation message to a destination Station (STA) which is a target of a MU-MIMO transmission, the MU-MIMO initiation message informing that MU-MIMO transmission will be initiated, receiving a sounding frame transmitted by the destination STA as a response to the MU-MIMO initiation message and performing MU-MIMO transmission on data by beamforming based on channel information obtained from the sounding frame. The sounding frame includes precoded and virtualized channel information between the AP and the STA. A dimension of the virtualized channel information is lower than a dimension of channel information between the AP and the STA.

公开(公告)号：US09807759B2

公开(公告)日：2017-10-31

申请号：US15372136

申请日：2016-12-07

Applicant: LG ELECTRONICS INC.

Inventor： Dong Wook Roh ,  Byeong Woo Kang ,  Dae Won Lee ,  Yong Ho Seok

IPC: H04W72/04 ,  H04L1/00 ,  H04W84/12

CPC classification number: H04W72/042 ,  H04B7/0413 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0697 ,  H04L1/0025 ,  H04L1/0041 ,  H04L2001/0093 ,  H04W52/42 ,  H04W84/12

Abstract: A method of transmitting a data frame by a transmitter in a WLAN system is provided. The method includes generating a data block including at least one data units respectively transmitted through at least one or more spatial streams to at least one receiver, transmitting first control information to the at least one receiver, transmitting second control information to each receiver, and transmitting the data block to the at least one receiver. The first control information includes a length indicator for the data block, a MIMO indicator indicating whether the data block is for SU-MIMO or MU-MIMO, and a spatial stream indication field including information about the number of the spatial streams. The second control information includes a FEC coding field indicating an encoding scheme applied to the data unit and an MCS field indicating an MCS applied to the data unit.

公开(公告)号：US09793966B2

公开(公告)日：2017-10-17

申请号：US14510458

申请日：2014-10-09

Applicant: LG ELECTRONICS INC.

Inventor： Yong Ho Seok ,  Yu Jin Noh ,  Bong Hoe Kim ,  Dae Won Lee

IPC: H04B7/0452 ,  H04B7/04 ,  H04B7/06 ,  H04L5/00 ,  H04W84/12

CPC classification number: H04B7/0452 ,  H04B7/0421 ,  H04B7/0621 ,  H04L5/0053 ,  H04W84/12

Abstract: A link adaptation method performed by a station (STA) in a wireless local area network (LAN) system supporting multi-user multiple-input multiple-output (MU-MIMO) is provided. The method includes: receiving a modulation and coding scheme (MCS) request, a steered sounding physical layer convergence procedure (PLOP) protocol data unit (PPDU) which is beam-formed to the STA, and a MIMO indicator including MU-MIMO-related information from an access point (AP); and transmitting feedback information including an MCS acquired from the steered sounding PPDU and the MU-MIMO-related information to the AP in response to the MCS request.

公开(公告)号：US09788346B2

公开(公告)日：2017-10-10

申请号：US15357438

申请日：2016-11-21

Applicant: LG ELECTRONICS INC.

Inventor： Yong Ho Seok

IPC: H04W4/00 ,  H04W74/08 ,  H04W74/00 ,  H04W4/20 ,  H04W72/04

CPC classification number: H04W74/0816 ,  H04W4/20 ,  H04W72/0446 ,  H04W74/006

Abstract: A method and a device for transmitting data in a wireless communication system are discussed. The method according to an embodiment includes transmitting a plurality of request to send (RTS) frames through a plurality of subchannels, each of the plurality of subchannels having a 20 megahertz (MHz) bandwidth; receiving at least one clear to send (CTS) frame through at least one idle subchannel; and transmitting a data frame. If the at least one CTS frame includes channel information related to the at least one idle subchannel through which the CTS frame is transmitted by the station, the data frame is transmitted through the at least one idle subchannel indicated by the channel information. A number of the at least one idle subchannel through which the CTS frame is transmitted is less than a number of the plurality of subchannels through which the plurality of RTS frames are transmitted.

公开(公告)号：US09781578B2

公开(公告)日：2017-10-03

申请号：US15397360

申请日：2017-01-03

Applicant: LG ELECTRONICS INC.

Inventor： Byoung Hoon Kim ,  Yong Ho Seok ,  Andrey Lyakhov

IPC: H04W24/00 ,  H04W4/08 ,  H04W72/04 ,  H04W84/12

CPC classification number: H04W4/08 ,  H04B7/0632 ,  H04L5/0023 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/0091 ,  H04L25/0204 ,  H04W24/00 ,  H04W72/042 ,  H04W72/1289 ,  H04W74/02 ,  H04W84/12

Abstract: A method of transmitting data in a wireless local access network, the method comprising: transmitting, by an access point, a downlink management frame to a plurality of recipients, the downlink management frame including information about a group address indicating a station group to which the plurality of recipients belongs; transmitting, by the access point, a data frame to the plurality of recipients, the data frame including the group address and a plurality of Aggregate-Medium Access Control (MAC) Protocol Data Units (A-MPDUs) for the plurality of recipients, wherein each of the plurality of A-MPDUs includes at least one MPDU for a corresponding one of the plurality of recipients, and wherein each of the plurality of A-MPDUs further includes zero or more padding bits so that all of the plurality of A-MPDUs have the same transmission time corresponding to a transmission time of a longest A-MPDU among the plurality of A-MPDUs.

公开(公告)号：US09756655B2

公开(公告)日：2017-09-05

申请号：US14570702

申请日：2014-12-15

Applicant: LG ELECTRONICS INC.

Inventor： Eun Sun Kim ,  Yong Ho Seok

IPC: H04L12/28 ,  H04W74/00 ,  H04W16/14 ,  H04W8/00 ,  H04W48/16

CPC classification number: H04W74/002 ,  H04W8/005 ,  H04W16/14 ,  H04W48/16

Abstract: Methods and apparatuses for acquiring/providing available channel information using Generic Advertisement Service (GAS) protocol in a wireless local area network (WLAN) are disclosed. AP (Access Point) station has a capability to acquire information for available channels from a database using a specific protocol related to an operation within the White Space (e.g. Access Network Query Protocol (ANQP)). And, non-AP station can retrieve the information for available channels by transmitting a Generic Advertisement Service (GAS) initial request frame to the AP station, wherein the GAS initial request frame comprises an Advertisement Protocol Element whose element ID indicates the specific protocol, and receiving a GAS initial response frame comprising a White Space Map (WSM) the specific protocol. The WSM comprises one or more white space channel units, and each of the white space channel units comprises a channel number field indicating one of the available channels and a power constraint field indicating a maximum allowable power on the indicated channel.

公开(公告)号：US09750080B2

公开(公告)日：2017-08-29

申请号：US15061582

申请日：2016-03-04

Applicant: LG Electronics Inc.

Inventor： Jong Hyun Park ,  Hyang Sun You ,  Bong Hoe Kim ,  Yong Ho Seok

IPC: H04W4/00 ,  H04W84/12 ,  H04L27/26 ,  H04L5/00

CPC classification number: H04W84/12 ,  H04L5/0007 ,  H04L27/2602 ,  H04L27/2605 ,  H04L27/261 ,  H04L27/2626

Abstract: Provided is a method for transmitting a data unit in a wireless local area network system, according to one embodiment. The method comprises transmitting a signal field, transmitting a first data symbol for a first data field, and transmitting a second data symbol for a second data field. The signal field, the first data symbol, and the second data symbol are transmitted through a 1 MHz channel bandwidth having a band of 1 GHz or less. Two pilot tones are inserted to each of the first data symbol and the second data symbol.

公开(公告)号：US09736697B2

公开(公告)日：2017-08-15

申请号：US14966076

申请日：2015-12-11

Applicant: LG ELECTRONICS INC.

Inventor： Jong Hyun Park ,  Ill Soo Sohn ,  Eun Sun Kim ,  Yong Ho Seok

IPC: H04W16/10 ,  H04W16/14 ,  H04L12/26 ,  H04W24/08 ,  H04W84/12 ,  G01S7/02

CPC classification number: H04W16/10 ,  G01S7/021 ,  H04L43/12 ,  H04W16/14 ,  H04W24/08 ,  H04W84/12

Abstract: A method for a wireless local area network performed by an access point (AP) configured to communicate over a primary subchannel and a secondary subchannel. The AP transmits a frame including a quiet channel element to a receiving station. The quiet channel element indicates that the secondary subchannel is to be quieted during a quiet interval in which the AP tests the secondary subchannel for a presence of radar transmissions and the receiving station does not send any frame to the AP. The quiet channel element includes an AP quiet mode field indicating whether a communication to the AP is allowed within the primary subchannel during the quiet interval. The primary subchannel and the secondary subchannel are quieted during the quiet interval if the AP quiet mode field indicates the communication to the AP is not allowed with the primary subchannel during the quiet interval.

公开(公告)号：US09713153B2

公开(公告)日：2017-07-18

申请号：US15064410

申请日：2016-03-08

Applicant: LG Electronics Inc.

Inventor： Yu Jin Noh ,  Yong Ho Seok ,  Bong Hoe Kim ,  Dae Won Lee

IPC: H04W72/04 ,  H04W72/02 ,  H04W84/12 ,  H04W40/02 ,  H04W76/02 ,  H04W88/08

CPC classification number: H04W72/0453 ,  H04W40/02 ,  H04W72/02 ,  H04W72/04 ,  H04W72/0406 ,  H04W76/10 ,  H04W84/12 ,  H04W88/08

Abstract: A method for communicating in a wireless local area network, and a device therefore are discussed. The method according to one embodiment includes selecting, by a transmitting station, a transmission channel; and transmitting, by the transmitting station, a Physical layer Protocol Data Unit (PPDU) over the selected transmission channel to a receiving station. The transmission channel includes a primary channel and a first channel if the first channel was idle. The transmission channel includes the primary channel, the first channel and a second channel if both the first channel and the second channel were idle. The primary channel is positioned between the first channel and the second channel if the transmission channel includes the primary channel, the first channel and the second channel.

公开(公告)号：US09712285B2

公开(公告)日：2017-07-18

申请号：US14354860

申请日：2012-11-19

Applicant: LG ELECTRONICS INC.

Inventor： Hyang Sun You ,  Yong Ho Seok ,  Ji Hyun Lee

IPC: H04L1/16 ,  H04L29/08 ,  H04W48/14 ,  H04W84/12

CPC classification number: H04L1/1685 ,  H04L67/16 ,  H04W48/14 ,  H04W84/12

Abstract: Method and device for discovering a service are provided. A responding device receives a service request frame including a first service identifier indicating a service queried by the requesting device. The responding device transmits a service response frame to indicate that the queried service is currently not available and a service announce frame follows on. The responding device determines whether the queried service is accepted or not during a pre-defined time after transmitting the service response frame.