公开(公告)号：US09107242B2

公开(公告)日：2015-08-11

申请号：US13880329

申请日：2011-12-27

Applicant: Ill Soo Sohn ,  Yong Ho Seok ,  Jong Hyun Park ,  Dae Won Lee ,  Byeong Woo Kang

Inventor： Ill Soo Sohn ,  Yong Ho Seok ,  Jong Hyun Park ,  Dae Won Lee ,  Byeong Woo Kang

IPC: H04B7/00 ,  H04W84/12 ,  H04W74/06

CPC classification number: H04B7/0478 ,  H04B7/0617 ,  H04L5/0048 ,  H04W74/06 ,  H04W84/12

Abstract: A method for a channel sounding in a wireless local area network is provided. The method includes transmitting a null data packet announcement (NDPA) frame, to a plurality of receivers, the NDPA frame requesting a channel statement information feedback and announcing that a null data packet (NDP) frame is to be transmitted; transmitting the NDP frame being a basis of channel estimation for the plurality of receivers; receiving a first feedback frame from a first receiver among the plurality of receivers, transmitting a feedback poll frame to a second receiver; and, receiving a second feedback frame from the second receiver, the second feedback frame including second channel state information estimated by the second receiver. If the first receiver fails to perform the channel estimation, the first feedback frame is a null feedback frame. The null feedback frame is a feedback frame not including channel state information.

Abstract translation: 提供了一种用于无线局域网中的信道探测的方法。 该方法包括向多个接收机发送空数据分组公告（NDPA）帧，NDPA帧请求信道语句信息反馈并通知要发送空数据分组（NDP）帧; 发送作为多个接收机的信道估计的基础的NDP帧; 从所述多个接收机中的第一接收机接收第一反馈帧，向第二接收机发送反馈轮询帧; 以及从所述第二接收机接收第二反馈帧，所述第二反馈帧包括由所述第二接收机估计的第二信道状态信息。 如果第一接收机不能执行信道估计，则第一反馈帧是空反馈帧。 空反馈帧是不包括信道状态信息的反馈帧。

公开(公告)号：US08891653B2

公开(公告)日：2014-11-18

申请号：US13509277

申请日：2010-11-12

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

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

IPC: H04B7/02 ,  H04L1/02 ,  H04B7/04 ,  H04B7/06

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 AP in a Wireless Local Area Network (WLAN) system is provided. The method includes transmitting an MU-MIMO initiation message to a destination 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 Hvirtual between the AP and the STA. A dimension of the Hvirtual is lower than a dimension of channel information H between the AP and the STA.

Abstract translation: 提供了一种由无线局域网（WLAN）系统中的AP执行的多用户多输入多输出（MU-MIMO）传输方法。 该方法包括向作为MU-MIMO传输的目标的目的地STA发送MU-MIMO发起消息，通知MU-MIMO传输将被发起的MU-MIMO发起消息，接收目的STA发送的探测帧 作为对MU-MIMO发起消息的响应，并且基于从发现帧获得的信道信息，通过波束成形对数据执行MU-MIMO传输。 探测帧包括在AP和STA之间的虚拟的预编码和虚拟化信道信息。 Hvirtual的维度低于AP和STA之间的信道信息H的维度。

公开(公告)号：US08873582B2

公开(公告)日：2014-10-28

申请号：US13082025

申请日：2011-04-07

Applicant: Yu Jin Noh ,  Dae Won Lee ,  Yong Ho Seok

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

IPC: H04W84/02 ,  H04L5/00 ,  H04L27/26 ,  H04W28/06

CPC classification number: H04W28/065 ,  H04L5/0023 ,  H04L5/005 ,  H04L5/0085 ,  H04L27/2602 ,  H04W84/12

Abstract: A method of transmitting a data block in a wireless communication system is provided. The method includes generating a data block used for multi-user transmission, the data block comprising a first control field and a data field for a plurality of users, the first control field indicating multi-user transmission of the data block, the data field comprising a plurality of data units, each data unit comprising a PSDU(PLCP(Physical Layer Convergence Procedure) Service Data Unit) for each user and padding bits which are appended to the PSDU for each user; and transmitting the data block to the plurality of users; wherein the number of the padding bits in each data unit is determined so that lengths of the plurality of data units are same and the number of the padding bits in each data unit is determined by Nsym, NDBPS,k, NPSDU,k, where Nsym denotes the number of OFDM symbols of the data field, NDBPS,k denotes the number of data bits per OFDM symbol for k-th user, and the NPSDU,k denotes the length of the PSDU for k-th user.

Abstract translation: 提供了一种在无线通信系统中发送数据块的方法。 该方法包括生成用于多用户传输的数据块，所述数据块包括用于多个用户的第一控制字段和数据字段，所述第一控制字段指示所述数据块的多用户传输，所述数据字段包括 多个数据单元，每个数据单元包括用于每个用户的PSDU（PLCP（物理层会聚过程）服务数据单元）和为每个用户附加到PSDU的填充比特; 以及向所述多个用户发送所述数据块; 其中确定每个数据单元中的填充比特数，使得多个数据单元的长度相同，并且每个数据单元中的填充比特数由Nsym，NDBPS，k，NPSDU，k确定，其中Nsym 表示数据字段的OFDM符号的数量，NDBPS，k表示第k个用户的每个OFDM符号的数据比特数，并且NPSDU，k表示第k个用户的PSDU的长度。

公开(公告)号：US20130329626A1

公开(公告)日：2013-12-12

申请号：US14001128

申请日：2012-02-21

Applicant: III Soo Sohn ,  Byeong Woo Kang ,  Dae Won Lee ,  Yong Ho Seok

Inventor： III Soo Sohn ,  Byeong Woo Kang ,  Dae Won Lee ,  Yong Ho Seok

IPC: H04W4/08

CPC classification number: H04W4/08 ,  H04B7/024 ,  H04B7/0452 ,  H04W84/12

Abstract: A method of receiving a multi-user packet by a receiver in a wireless local area network system. The method includes: receiving a first group identifier (ID) management request message from a transmitter, wherein the group ID management request message includes information about at least one group ID which is intended to be allocated to the receiver for multi user-multiple input multiple output (MU-MIMO) transmission, and the information about the at least one group ID indicates each group ID and a spatial stream set position for the each group ID; transmitting a first group ID management response message to the transmitter, wherein the group ID management response message indicates admission or adjustment for allocation of the at least one group ID; and receiving at least one multi-user packet from the transmitter, wherein the multi-user packet is transmitted using MU-MIMO transmission.

Abstract translation: 一种在无线局域网系统中由接收机接收多用户分组的方法。 该方法包括：从发射机接收第一组标识符（ID）管理请求消息，其中，组ID管理请求消息包括关于多个用户多输入多个目的地被分配给接收机的至少一个组ID的信息 输出（MU-MIMO）传输，并且关于至少一个组ID的信息指示每个组ID的每个组ID和空间流设置位置; 向所述发射机发送第一组ID管理响应消息，其中所述组ID管理响应消息指示所述至少一个组ID的分配的准入或调整; 以及从所述发射机接收至少一个多用户分组，其中使用MU-MIMO传输来发送所述多用户分组。

公开(公告)号：US20130258932A1

公开(公告)日：2013-10-03

申请号：US13991822

申请日：2011-10-27

Applicant: Suh Wook Kim ,  Yong Ho Seok ,  Bong Hoe Kim ,  Dae Won Lee

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

IPC: H04W52/02

CPC classification number: H04W52/0225 ,  H04W8/26 ,  H04W24/00 ,  H04W48/08 ,  H04W52/0229 ,  H04W74/06 ,  H04W84/12 ,  Y02D70/142 ,  Y02D70/21

Abstract: A method for a power save mode operation in a wireless local area network (WLAN) system is provided. The method includes transmitting, by an access point (AP), a traffic indication map (TIM) element that announces existence of buffered traffic, wherein the TIM element includes an association ID (AID) assigned to a buffered STA having the buffered traffic when the buffered station (STA) is associated with the AP; receiving, by the AP, a poll frame for requesting data frame transmission from a candidate STA, wherein the poll frame contains an AID of the candidate STA and a medium access control (MAC) address which is a unique identifying information of the candidate STA; and determining, by the AP, whether the candidate STA is the buffered STA on the basis of the AID and the MAC address of the candidate STA.

Abstract translation: 提供了一种用于无线局域网（WLAN）系统中的省电模式操作的方法。 该方法包括由接入点（AP）发送通知缓冲业务的存在的业务指示映射（TIM）元素，其中，所述TIM元素包括分配给具有缓冲流量的缓冲STA的关联ID（AID） 缓冲站（STA）与AP相关联; 由AP接收用于从候选STA请求数据帧传输的轮询帧，其中轮询帧包含候选STA的AID和作为候选STA的唯一标识信息的介质访问控制（MAC）地址; 以及基于所述候选STA的AID和MAC地址，由所述AP确定所述候选STA是否为所述缓冲STA。

公开(公告)号：US20130235836A1

公开(公告)日：2013-09-12

申请号：US13885332

申请日：2011-11-14

Applicant: Dong Wook Roh ,  Ill Soo Sohn ,  Kyoung Young Song ,  Dae Won Lee ,  Yong Ho Seok

Inventor： Dong Wook Roh ,  Ill Soo Sohn ,  Kyoung Young Song ,  Dae Won Lee ,  Yong Ho Seok

IPC: H04L1/00

CPC classification number: H04L1/0004 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0031 ,  H04L1/0079 ,  H04L1/0618 ,  H04L1/1685

Abstract: The present invention relates to a method of determining a Modulation and Coding Scheme (MCS) feedback in a Wireless Local Area Network (WLAN) system, including an MCS FeedBack (MFB) responder receiving a first frame, including a request message requesting to send the MFB, from an MFB requester and the MFB responder sending the MFB, including a recommended MCS value, to the MFB requester. The recommended MCS value is derived with reference to at least one of unsolicit type information indicative of a type of the MFB, transmit type information indicative of a transmission type of data, coding type information indicative of a coding scheme applied to the data, a group ID indicative of a group of target stations (STAs) to which the data will be transmitted, and MFB bandwidth information indicative of a bandwidth of a channel.

Abstract translation: 本发明涉及一种在无线局域网（WLAN）系统中确定调制和编码方案（MCS）反馈的方法，包括接收第一帧的MCS反馈（MFB）应答器，包括请求发送 MFB，MFB请求者和MFB响应者向MFB请求者发送MFB，包括推荐的MCS值。 推荐的MCS值是参照表示MFB的类型的非事件型信息，指示数据的传输类型的发送类型信息，表示应用于数据的编码方式的编码类型信息，组 指示要发送数据的一组目标站（STA）的ID以及指示信​​道带宽的MFB带宽信息。

公开(公告)号：US20130223427A1

公开(公告)日：2013-08-29

申请号：US13880329

申请日：2011-12-27

Applicant: Ill Soo Sohn ,  Yong Ho Seok ,  Jong Hyun Park ,  Dae Won Lee ,  Byeong Woo Kang

Inventor： Ill Soo Sohn ,  Yong Ho Seok ,  Jong Hyun Park ,  Dae Won Lee ,  Byeong Woo Kang

IPC: H04W84/12

CPC classification number: H04B7/0478 ,  H04B7/0617 ,  H04L5/0048 ,  H04W74/06 ,  H04W84/12

Abstract: A method for a channel sounding in a wireless local area network is provided. The method includes transmitting a null data packet announcement (NDPA) frame, to a plurality of receivers, the NDPA frame requesting a channel statement information feedback and announcing that a null data packet (NDP) frame is to be transmitted; transmitting the NDP frame being a basis of channel estimation for the plurality of receivers; receiving a first feedback frame from a first receiver among the plurality of receivers, transmitting a feedback poll frame to a second receiver; and, receiving a second feedback frame from the second receiver, the second feedback frame including second channel state information estimated by the second receiver. If the first receiver fails to perform the channel estimation, the first feedback frame is a null feedback frame. The null feedback frame is a feedback frame not including channel state information.

Abstract translation: 提供了一种用于无线局域网中的信道探测的方法。 该方法包括向多个接收机发送空数据分组公告（NDPA）帧，NDPA帧请求信道语句信息反馈并通知要发送空数据分组（NDP）帧; 发送作为多个接收机的信道估计的基础的NDP帧; 从所述多个接收机中的第一接收机接收第一反馈帧，向第二接收机发送反馈轮询帧; 以及从所述第二接收机接收第二反馈帧，所述第二反馈帧包括由所述第二接收机估计的第二信道状态信息。 如果第一接收机不能执行信道估计，则第一反馈帧是空反馈帧。 空反馈帧是不包括信道状态信息的反馈帧。

公开(公告)号：US20120281774A1

公开(公告)日：2012-11-08

申请号：US13520769

申请日：2011-02-09

Applicant: Dae Won Lee ,  Yu Jin Noh ,  Byeong Woo Kang ,  Yong Ho Seok

Inventor： Dae Won Lee ,  Yu Jin Noh ,  Byeong Woo Kang ,  Yong Ho Seok

IPC: H04L27/28 ,  H04W84/12

CPC classification number: H04L69/323 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/06 ,  H04L27/2626 ,  H04L27/2646 ,  H04L27/2647 ,  H04L27/28 ,  H04W84/12

Abstract: A method and apparatus for transmitting control information in a wireless communication system is provided. The method includes transmitting common control information including a multiple input multiple output (MIMO) indicator indicating single user-MIMO (SU-MIMO) or multi user-MIMO (MU-MIMO) to a receiver, generating first precoded dedicated control information by performing precoding on dedicated control information including information for the MU-MIMO by the use of a first precoding matrix, generating second precoded dedicated control information by performing precoding on the first precoded dedicated control information by the use of a second precoding matrix and transmitting the second precoded dedicated control information to the receiver.

Abstract translation: 提供一种在无线通信系统中发送控制信息的方法和装置。 该方法包括向接收机发送包括指示单用户MIMO（SU-MIMO）或多用户MIMO（MU-MIMO）的多输入多输出（MIMO）指示符的公共控制信息，通过执行预编码产生第一预编码的专用控制信息 通过使用第一预编码矩阵来包括用于MU-MIMO的信息的专用控制信息，通过使用第二预编码矩阵对第一预编码专用控制信息执行预编码来产生第二预编码专用控制信息，并且发送第二预编码专用 控制信息给接收机。

公开(公告)号：US20120044925A1

公开(公告)日：2012-02-23

申请号：US13318019

申请日：2010-12-03

Applicant: Dae Won Lee ,  Byeong Woo Kang ,  Yu Jin Noh ,  Bong Hoe Kim ,  Yong Ho Seok

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

IPC: H04W84/12

CPC classification number: H04L27/2602 ,  H04B7/0413 ,  H04L1/1812 ,  H04L5/0023 ,  H04L5/0091 ,  H04W52/0216 ,  H04W52/0219 ,  H04W52/0241 ,  H04W72/0413 ,  H04W72/042 ,  H04W80/02 ,  H04W84/12 ,  H04W88/08 ,  Y02B70/30 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/22

Abstract: There is provided a method and apparatus for transmitting a frame which is performed by a transmission STA in a WLAN system. The method of transmitting a frame according to the present invention includes generating an MAC Protocol Data Unit (MPDU) to be transmitted to a target station, generating a PLCP Protocol Data Unit (PPDU) by attaching a Physical Layer Convergence Procedure (PLCP) header to the MPDU, and transmitting the PPDU to the target station. The PLCP header comprises a partial Association ID (AID) of the target station.

Abstract translation: 提供了一种用于发送由WLAN系统中的传输STA执行的帧的方法和装置。 根据本发明的发送帧的方法包括生成要发送到目标站的MAC协议数据单元（MPDU），通过将物理层会聚过程（PLCP）头部附加到 MPDU，并将PPDU发送到目标站。 PLCP报头包括目标站的部分关联ID（AID）。

公开(公告)号：US20110110348A1

公开(公告)日：2011-05-12

申请号：US12941974

申请日：2010-11-08

Applicant: Dae Won Lee ,  Dong Wook Roh ,  Byeong Woo Kang ,  Yong Ho Seok ,  Yu Jin Noh ,  Bong Hoe Kim

Inventor： Dae Won Lee ,  Dong Wook Roh ,  Byeong Woo Kang ,  Yong Ho Seok ,  Yu Jin Noh ,  Bong Hoe Kim

IPC: H04W40/00

CPC classification number: H04L27/261 ,  H03M5/12 ,  H04B7/0413 ,  H04L1/0041 ,  H04L1/0061 ,  H04L25/4904 ,  H04L27/14 ,  H04L27/144 ,  H04L27/148 ,  H04L27/1563 ,  H04L27/22 ,  H04L27/2273 ,  H04L27/2331 ,  H04L27/2332 ,  H04L27/2613 ,  H04L27/2647 ,  H04L2027/0028 ,  H04N5/4401 ,  H04Q1/46 ,  H04W28/06 ,  H04W84/12

Abstract: A method of transmitting a Physical Layer Convergence Procedure (PLCP) frame in a Very High Throughput (VHT) Wireless Local Area Network (WLAN) system includes generating a MAC Protocol Data Unit (MPDU) to be transmitted to a destination station (STA), generating a PLCP Protocol Data Unit (PPDU) by adding a PLCP header, including an L-SIG field containing control information for a legacy STA and a VHT-SIG field containing control information for a VHT STA, to the MPDU, and transmitting the PPDU to the destination STA. A constellation applied to some of Orthogonal Frequency Division Multiplex (OFDM) symbols of the VHT-SIG field is obtained by rotating a constellation applied to an OFDM symbol of the L-SIG field.

Abstract translation: 一种在非常高吞吐量（VHT）无线局域网（WLAN）系统中发送物理层汇聚程序（PLCP）帧的方法包括生成要发送到目的站（STA）的MAC协议数据单元（MPDU） 通过将包含包含用于传统STA的控制信息的L-SIG字段和包含用于VHT STA的控制信息的VHT-SIG字段的L-SIG字段的PLCP头添加到MPDU来生成PLCP协议数据单元（PPDU），以及发送PPDU 到目的地STA。 通过旋转施加到L-SIG字段的OFDM符号的星座来获得应用于VHT-SIG字段的一些正交频分复用（OFDM）符号的星座。