公开(公告)号：US10469302B2

公开(公告)日：2019-11-05

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: H04L1/00 ,  H04L1/18 ,  H04L27/20 ,  H04L5/00 ,  H04L1/08 ,  H04L27/26 ,  H04L25/02 ,  H04B7/0452 ,  H04L25/03 ,  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.

公开(公告)号：US10461901B2

公开(公告)日：2019-10-29

申请号：US15545664

申请日：2016-01-22

Applicant: LG ELECTRONICS INC.

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

IPC: H04L5/00 ,  H04W72/04 ,  H04L27/26 ,  H04W84/12

Abstract: Proposed are a method and a device for transmitting a signal including a data field in a wireless LAN. For example, an access point (AP) allocates, to a second station, a second frequency band adjacent to a first frequency band, wherein the second frequency band can include a plurality of resource units. In addition, a signal including the data field can be transmitted to the second station through the allocated second frequency band. Furthermore, when the first frequency band is allocated to the first station, the AP can allocate, to the second station, as a null resource unit, a resource unit adjacent to the first frequency band among the plurality of resource units.

公开(公告)号：US10439780B2

公开(公告)日：2019-10-08

申请号：US15548706

申请日：2015-11-30

Applicant: LG ELECTRONICS INC.

Inventor： Eunsung Park ,  Wookbong Lee ,  Hangyu Cho

IPC: H04L5/00 ,  H04L27/26 ,  H04W84/12 ,  H04B7/0413 ,  H04L29/08

Abstract: Disclosed are a method for multi-user transmission and reception in a wireless communication system and a device for same. More particularly, a method for performing multi-user (MU) transmission by a station (STA) device in a wireless communication system comprises the steps of: generating a high efficiency-long training field (HE-LTF) sequence in a frequency domain in accordance with an MU transmission bandwidth; and transmitting a physical protocol data unit (PPDU) which comprises one or more symbols to which the HE-LTF sequence is mapped, wherein the HE-LTF sequence can be generated by multiplying one row of a P matrix to a length unit of a row of the P matrix in a predetermined sequence.

公开(公告)号：US10425269B2

公开(公告)日：2019-09-24

申请号：US15527289

申请日：2015-11-17

Applicant: LG ELECTRONICS INC.

Inventor： Kilbom Lee ,  Wookbong Lee ,  Eunsung Park ,  Hangyu Cho ,  Jiwon Kang

IPC: H04L27/26 ,  H04L27/00 ,  H04L27/227 ,  H04L5/00

Abstract: Disclosed is a CFO estimation method, which generates a first function defined by a received signal of two sequential OFDM symbols for a specific subcarrier, generates a second function defined on the basis of signs and magnitudes of a real number part and an imaginary number part of the first function, repeats the steps of generating the first function and the second function for all of a subcarrier set, and determines, as a residual CFO, a phase of a third function obtained by adding up the results of the repetition.

公开(公告)号：US10412744B2

公开(公告)日：2019-09-10

申请号：US15505471

申请日：2015-08-21

Applicant: LG ELECTRONICS INC.

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

IPC: H04J3/00 ,  H04W72/08 ,  H04L1/00 ,  H04L27/34 ,  H04L27/26 ,  H04W74/04 ,  H04W84/04 ,  H04L1/16 ,  H04L5/00

Abstract: A method is provided for transmitting data performed by a station (STA) device in a Wireless Local Area Network (WLAN) system. The STA device generates a Physical Protocol Data Unit (PPDU) including a physical preamble and a data field sequentially, and transmits the PPDU. The physical preamble includes sequentially a Legacy (L)-preamble and a High Efficiency (HE)-preamble. The HE-preamble includes sequentially an HE-Signal (SIG) A field, an HE-SIG B field, an HE-Short Training Field (STF) field, and an HE-Long Training Field (LTF) field, A first Inverse Discrete Fourier Transform (IDFT)/Discrete Fourier Transform (DFT) period is applied from the L-preamble to the HE-SIG B field and a second IDFT/DFT period is applied from the HE-STF field to the data field. The second IDFT/DFT period is 4 times of the first IDFT/DFT period. The HE SIG A field includes common control information and the HE-SIG B field includes user-specific information.

公开(公告)号：US10404513B2

公开(公告)日：2019-09-03

申请号：US15840539

申请日：2017-12-13

Applicant: LG ELECTRONICS INC.

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

IPC: H04J3/06 ,  H04L27/26 ,  H04L5/00

Abstract: A method and a device for transmitting a data unit are disclosed. A method for transmitting a PPDU can comprise the steps of: generating, by an STA, the PPDU including a first portion and a second portion; and transmitting, by the STA, the PPDU, wherein the first portion is generated by performing IFFT according to a first FFT size, the second portion is generated by performing IFFT according to a second FFT size, and the first FFT size can differ from the second FFT size.

公开(公告)号：US10356784B2

公开(公告)日：2019-07-16

申请号：US15619342

申请日：2017-06-09

Applicant: LG ELECTRONICS INC.

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

IPC: H04W72/04 ,  H04W84/12

Abstract: Proposed is a control field including allocation information regarding a resource unit (RU) in a wireless local area network (WLAN) system supporting a plurality of RUs. The control field including the allocation information regarding the RU may be included in an uplink or downlink a physical layer (PHY) protocol data unit (PPDU), and may be designed in consideration of a plurality of frequency bands. A control field corresponding to a specific frequency band may be duplicated in a different frequency band. Further, the control field corresponding to the specific frequency band may be used for scheduling of a data field corresponding to the same frequency band and a data field corresponding to the different frequency band.

公开(公告)号：US10349288B2

公开(公告)日：2019-07-09

申请号：US15316138

申请日：2015-01-27

Applicant: LG ELECTRONICS INC.

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

IPC: H04W24/02 ,  H04L5/00 ,  H04W28/02 ,  H04W72/12 ,  H04W72/04 ,  H04W84/12

Abstract: A method and device for receiving a frame are disclosed. The method for receiving a frame over a wireless LAN may include: transmitting, by an access point (AP), an uplink transmission scheduling frame to a plurality of stations (STA); receiving, by the AP, a sync PPDU in response to the uplink transmission scheduling frame from each of the plurality of STAs; transmitting, by the AP, an adjustment frame, including adjustment information determined based on the sync PPDU, to the plurality of STAs; receiving, by the AP, the uplink frame transmitted based on the adjustment information by each of the plurality of STAs over an overlap time resource; and transmitting, by the AP, an ACK frame of the uplink frame to each of the plurality of STAs.

公开(公告)号：US10313082B2

公开(公告)日：2019-06-04

申请号：US15522727

申请日：2015-10-27

Applicant: LG ELECTRONICS INC.

Inventor： Jeongki Kim ,  Kiseon Ryu ,  Hangyu Cho

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

Abstract: The present document relates to a method for transmitting an acknowledgment/negative-acknowledgment (ACK/NACK) signal for data transmitted from a plurality of stations (STAs) by an access point (AP) in a wireless LAN (WLAN) system and an apparatus therefor. To this end, the AP transmits a trigger frame to the plurality of STAs, receives data transmitted from the plurality of STAs in response to the trigger frame, and transmits and ACK/ANCK signal for the data received from the plurality of STAs. In this process, when all the data received from the plurality of STAs have been successfully received, the ACK/NACK signal may be transmitted not using a block ACK frame but using an ACK frame.

公开(公告)号：US10277368B2

公开(公告)日：2019-04-30

申请号：US15473528

申请日：2017-03-29

Applicant: LG ELECTRONICS INC.

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

IPC: H04W84/12 ,  H04L5/00 ,  H04W74/00 ,  H04W74/02

Abstract: According to an embodiment of the present specification, a method for transmitting an uplink frame in a wireless local area network (WLAN) system and performed by a user station (STA) includes: receiving from an access point (AP) a trigger frame comprising association identifier information for orthogonal frequency division multiple access (OFDMA)-based random access and allocation information indicating a resource unit, wherein the association identifier information indicates any one of a first value irrelevant to whether being associated with the AP, a second value for a first STA group associated with the AP, and a third value for a second STA group un-associated with the AP; and performing a countdown operation according to the association identifier information based on a backoff value which is set in a backoff counter of the user STA in order to transmit the uplink frame.