公开(公告)号：US20140301383A1

公开(公告)日：2014-10-09

申请号：US14352633

申请日：2012-10-16

Applicant: LG ELECTRONICS INC. ,  KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION

Inventor： Ill Soo Sohn ,  Han Bae Kong ,  Hae Wook Park ,  Inkyu Lee ,  Chang Ick Song

IPC: H04L27/26

CPC classification number: H04L27/2626 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0617 ,  H04B7/0619 ,  H04W84/12

Abstract: The present invention relates to a method and apparatus for transmitting a frame in a wireless LAN system. An access point (AP) receives a single orthogonal frequency division multiplexing (OFDM) symbol from each of a plurality of stations (STA) and a single-tone request to send (sRTS) frame through a single subcarrier, selects STAs for performing uplink (UL) multiuser (MU)-multiple input multiple output (MIMO) transmission, and transmits to the plurality of STAs a single-tone clear to send (sCTS) frame allocated to the same subcarrier as a subcarrier to which the sRTS frames received from the selected STAs are allocated.

Abstract translation: 本发明涉及一种用于在无线LAN系统中发送帧的方法和装置。 接入点（AP）从多个站（STA）中的每一个接收单个正交频分复用（OFDM）符号和通过单个子载波发送（sRTS）帧的单音请求，选择用于执行上行链路的STA（ UL）多用户（MU）多输入多输出（MIMO）传输，并且向多个STA发送分配给与从sRTS帧接收的sRTS帧相同的子载波的单音清除发送（sCTS）帧 所选择的STA被分配。

公开(公告)号：US20140247824A1

公开(公告)日：2014-09-04

申请号：US14351134

申请日：2012-10-11

Applicant: LG ELECTRONICS INC. ,  Korea University Research and Business Foundation

Inventor： Ill Soo Sohn ,  Han Bae Kong ,  Chang Ick Song ,  Hae Wook Park ,  Yong Ho Seok ,  Inkyu Lee

IPC: H04L27/26

CPC classification number: H04L27/2601 ,  H04B7/0452 ,  H04W8/186 ,  H04W74/002

Abstract: Provided are a method and device for processing an uplink (UL) signal in a WLAN system. An access point (AP) receives a request to send (RTS) frame from one station (STA) among a plurality of STAs, transmits a group identifier (ID) of a group to which STAs for performing UL multi user multiple-input multiple-output (MU-MIMO) transmission together with the one STA, among group IDs of a group to which the one STA belongs, and receives UL signals from the STAs which perform the UL MU-MIMO transmission such that the received UL signals are processed.

Abstract translation: 提供了一种在WLAN系统中处理上行链路（UL）信号的方法和设备。 接入点（AP）在多个STA中从一个站（STA）接收发送（RTS）帧的请求，发送用于执行UL多用户多输入多输入多播的STA的组的组标识符（ID） 在一个STA所属的组的组ID中，与一个STA一起输出（MU-MIMO）传输，并从执行UL MU-MIMO传输的STA接收UL信号，使得接收到的UL信号被处理。

公开(公告)号：US09258799B2

公开(公告)日：2016-02-09

申请号：US14297483

申请日：2014-06-05

Applicant: LG ELECTRONICS INC.

Inventor： Ill Soo Sohn ,  Yong Ho Seok ,  Kyoung Young Song ,  Dae Won Lee ,  Byeong Woo Kang

IPC: H04W72/04 ,  H04L1/00 ,  H04L1/06 ,  H04W24/10

CPC classification number: H04L1/0003 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0027 ,  H04L1/06 ,  H04W24/10 ,  H04W72/04

Abstract: A method and device for link adaptation in a wireless local area network system, are discussed. The method may include receiving, by a responding station, from a requesting station, a requesting Physical layer Protocol Data Unit (PPDU) for requesting a modulation and coding scheme (MCS) feedback via a plurality of spatial streams, the requesting PPDU including an MCS request (MRQ) field that is set to one to request the responding station to provide the MCS feedback; and transmitting, by the responding station, to the requesting station, the MCS feedback including a recommended MCS field and a recommended stream field. The recommended MCS field indicates a recommended MCS, the recommended stream field indicates a number of at least one recommended spatial stream, and the number of the at least one recommended spatial stream is less than a number of the plurality of spatial streams used for the requesting PPDU.

Abstract translation: 讨论了一种在无线局域网系统中进行链路自适应的方法和装置。 所述方法可以包括由响应站从请求站接收用于经由多个空间流请求调制和编码方案（MCS）反馈的请求物理层协议数据单元（PPDU），所述请求PPDU包括MCS 请求（MRQ）字段设置为1以请求响应站提供MCS反馈; 并且由响应站向请求站发送MCS反馈，其包括推荐的MCS字段和推荐流字段。 推荐的MCS字段指示推荐的MCS，推荐的流字段指示至少一个推荐的空间流的数量，并且至少一个推荐的空间流的数量小于用于请求的多个空间流的数量 PPDU。

公开(公告)号：US20140314056A1

公开(公告)日：2014-10-23

申请号：US14358681

申请日：2012-11-19

Applicant: LG ELECTRONICS INC.

Inventor： Jong Hyun Park ,  Hyang Sun You ,  Ill Soo Sohn ,  Bong Hoe Kim

IPC: H04W72/04

CPC classification number: H04W72/04 ,  H04B7/2643 ,  H04B7/2656 ,  H04W84/12

Abstract: The present invention relates to a method for transmitting and receiving a frame performed by an AP in a wireless communication system. The method includes the steps of: transmitting a PST message providing instructions to transmit a frame to at least one STA; and receiving frames from a first STA and a second STA. The PST message includes first subband information indicating a first subband in which a first frame is transmitted from the first STA and second subband information indicating a second subband in which a second frame is transmitted from the second STA.

Abstract translation: 本发明涉及一种在无线通信系统中发送和接收由AP执行的帧的方法。 该方法包括以下步骤：发送提供向至少一个STA发送帧的指令的PST消息; 以及从第一STA和第二STA接收帧。 PST消息包括指示从第一STA发送第一帧的第一子带的第一子带信息和指示从第二STA发送第二帧的第二子带的第二子带信息。

公开(公告)号：US20140301240A1

公开(公告)日：2014-10-09

申请号：US14360232

申请日：2012-11-26

Applicant: LG Electronics Inc.

Inventor： Jong Hyun Park ,  Ill Soo Sohn

IPC: H04W24/08 ,  H04B7/06

CPC classification number: H04W24/08 ,  H04B7/0643 ,  H04B7/0658

Abstract: Disclosed are a method and an apparatus for feed back of channel state information. The method for transmitting channel state information comprises the steps of: receiving a null data packet (NDP) frame; calculating signal to noise ratio (SNR) information based on subcarrier information of at least one spatial stream via which the NDP frame is transmitted; and calculating a compressed beamforming feedback matrix including channel state information based on the information on the subcarrier used in transmitting the spatial stream. Thus, accurate feedback information is calculated from a frequency selective channel and utilized to enable the efficient utilization of frequency resources.

Abstract translation: 公开了一种用于反馈信道状态信息的方法和装置。 用于发送信道状态信息的方法包括以下步骤：接收空数据分组（NDP）帧; 基于发送所述NDP帧的至少一个空间流的子载波信息来计算信噪比（SNR）信息; 以及基于关于在发送空间流中使用的子载波的信息来计算包括信道状态信息的压缩波束形成反馈矩阵。 因此，从频率选择信道计算准确的反馈信息，并且用于使得能够有效利用频率资源。

公开(公告)号：US10057036B2

公开(公告)日：2018-08-21

申请号：US15689117

申请日：2017-08-29

Applicant: LG ELECTRONICS INC.

Inventor： Dae Won Lee ,  Ill Soo Sohn ,  Yong Ho Seok

IPC: H04L5/00 ,  H04W84/12 ,  H04B7/06 ,  H04W16/28 ,  H04L1/18 ,  H04B7/0452

CPC classification number: H04L5/0053 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0636 ,  H04L1/1812 ,  H04L5/0023 ,  H04W16/28 ,  H04W84/12

Abstract: A method is provided for communications between a responding station and a requesting station. In a wireless local area network, the responding station receives a null data packet announcement (NDPA) frame and a null data packet (NDP) frame for channel sounding, and a first poll frame, from the requesting station. The NDP frame follows the NDPA frame. In response to the first poll frame, the responding station transmits a first feedback data field including beamforming feedback information and signal to noise ratio (SNR) information to the requesting station. The responding station receives a second poll frame including a segment retransmission bitmap field indicating at least one segment of the first feedback data field from the requesting station. In response to the second poll frame, the responding station transmits a second feedback data field including the at least one segment of the first feedback data field to the requesting station.

公开(公告)号：US09729367B2

公开(公告)日：2017-08-08

申请号：US14351134

申请日：2012-10-11

Applicant: LG ELECTRONICS INC. ,  Korea University Research and Business FOUNDATION

Inventor： Ill Soo Sohn ,  Han Bae Kong ,  Chang Ick Song ,  Hae Wook Park ,  Yong Ho Seok ,  Inkyu Lee

IPC: H04W4/00 ,  H04L27/26 ,  H04W74/00 ,  H04B7/0452 ,  H04W8/18

CPC classification number: H04L27/2601 ,  H04B7/0452 ,  H04W8/186 ,  H04W74/002

Abstract: Provided are a method and device for processing an uplink (UL) signal in a WLAN system. An access point (AP) receives a request to send (RTS) frame from one station (STA) among a plurality of STAs, transmits a group identifier (ID) of a group to which STAs for performing UL multi user multiple-input multiple-output (MU-MIMO) transmission together with the one STA, among group IDs of a group to which the one STA belongs, and receives UL signals from the STAs which perform the UL MU-MIMO transmission such that the received UL signals are processed.

公开(公告)号：US09520964B2

公开(公告)日：2016-12-13

申请号：US14993363

申请日：2016-01-12

Applicant: LG ELECTRONICS INC.

Inventor： Ill Soo Sohn ,  Yong Ho Seok ,  Kyoung Young Song ,  Dae Won Lee ,  Byeong Woo Kang

IPC: H04L1/00 ,  H04L1/06 ,  H04W24/10 ,  H04W72/04

CPC classification number: H04L1/0003 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0027 ,  H04L1/06 ,  H04W24/10 ,  H04W72/04

Abstract: A method and a device for reporting a modulation and coding scheme (MCS) feedback in a wireless local area network are provided. A responding station receives, from a requesting station, a requesting Physical layer Protocol Data Unit (PPDU) for requesting a MCS feedback via a plurality of spatial streams. A recommended MCS is estimated under an assumption that the requesting station will transmit at least one first spatial stream among the plurality of spatial streams used for the requesting PPDU, The responding station transmits, to the requesting station, the MCS feedback including a recommended MCS field indicating the recommended MCS and a recommended stream field indicating a number of at least one recommended spatial stream. A number of the at least one first spatial stream used for estimating the recommended MCS is equal to the number of the at least one recommended spatial stream.

Abstract translation: 提供了一种用于在无线局域网中报告调制和编码方案（MCS）反馈的方法和装置。 响应站从请求站接收用于通过多个空间流请求MCS反馈的请求物理层协议数据单元（PPDU）。 在假设请求站将在用于请求PPDU的多个空间流中发送至少一个第一空间流的假设下，估计推荐的MCS。响应站向请求站发送包括推荐MCS字段的MCS反馈 指示推荐的MCS和推荐的流字段，指示至少一个推荐的空间流的数量。 用于估计推荐MCS的至少一个第一空间流的数目等于至少一个推荐空间流的数目。

公开(公告)号：US09332449B2

公开(公告)日：2016-05-03

申请号：US14360232

申请日：2012-11-26

Applicant: LG Electronics Inc.

Inventor： Jong Hyun Park ,  Ill Soo Sohn

IPC: G01R31/08 ,  H04W24/08 ,  H04B7/06

CPC classification number: H04W24/08 ,  H04B7/0643 ,  H04B7/0658

Abstract: Disclosed are a method and an apparatus for feed back of channel state information. The method for transmitting channel state information comprises the steps of: receiving a null data packet (NDP) frame; calculating signal to noise ratio (SNR) information based on subcarrier information of at least one spatial stream via which the NDP frame is transmitted; and calculating a compressed beamforming feedback matrix including channel state information based on the information on the subcarrier used in transmitting the spatial stream. Thus, accurate feedback information is calculated from a frequency selective channel and utilized to enable the efficient utilization of frequency resources.

Abstract translation: 公开了一种用于反馈信道状态信息的方法和装置。 用于发送信道状态信息的方法包括以下步骤：接收空数据分组（NDP）帧; 基于发送所述NDP帧的至少一个空间流的子载波信息来计算信噪比（SNR）信息; 以及基于关于在发送空间流中使用的子载波的信息来计算包括信道状态信息的压缩波束形成反馈矩阵。 因此，从频率选择信道计算准确的反馈信息，并且用于使得能够有效利用频率资源。