公开(公告)号：US09504065B2

公开(公告)日：2016-11-22

申请号：US15005766

申请日：2016-01-25

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Il-Gu Lee ,  Sok-Kyu Lee

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

CPC classification number: H04W74/04 ,  H04W74/0816 ,  H04W74/0875

Abstract: A method for guaranteeing a data frame transmit opportunity in a wireless LAN system having three different transmission modes includes: setting a first transmission protection interval based on a lowest transmission mode, when a node of a mode having a lowest transmission rate among the three transmission modes exists in the wireless LAN system, aggregating a data frame to be transmitted within time of the set transmission protection interval, and transmitting the data frame; and setting a second transmission protection interval based on a mode having a highest transmission rate, when only nodes of a mode having a highest transmission rate among the three transmission modes exist, aggregating a data frame to be transmitted within time of the set transmission protection interval, and transmitting the data frame.

Abstract translation: 一种用于在具有三种不同传输模式的无线LAN系统中保证数据帧发送机会的方法包括：当在三种传输模式中具有最低传输速率的模式的节点时，基于最低传输模式设置第一传输保护间隔 存在于无线LAN系统中，在设定的传输保护间隔的时间内聚合要发送的数据帧，并发送数据帧; 并且当仅存在三个传输模式中具有最高传输速率的模式的节点时，基于具有最高传输速率的模式设置第二传输保护间隔，在设置的传输保护间隔的时间内聚合要传输的数据帧 ，并发送数据帧。

公开(公告)号：US09118426B2

公开(公告)日：2015-08-25

申请号：US13902607

申请日：2013-05-24

Applicant: Electronics and Telecommunications Research Institute

Inventor： Yun Joo Kim ,  Sok-Kyu Lee ,  Hyun Kyu Chung

IPC: H04H20/42 ,  H04L12/18 ,  H04L29/08 ,  H04W28/06

CPC classification number: H04H20/42 ,  H04L12/189 ,  H04L69/324 ,  H04W28/06

Abstract: A method for simultaneously transmitting packets to one or more users in a wireless communication system includes: generating the packets which include length information and are to be transmitted to the one or more users; and simultaneously transmitting the generated packets to the one or more users. The length information includes information representing a unit of the length information and information representing lengths of the packets according to the unit.

Abstract translation: 一种用于在无线通信系统中同时向一个或多个用户发送分组的方法包括：生成包括长度信息并将被发送给一个或多个用户的分组; 同时将生成的分组发送到一个或多个用户。 长度信息包括表示长度信息的单位的信息和表示根据该单元的分组的长度的信息。

公开(公告)号：US08929478B2

公开(公告)日：2015-01-06

申请号：US13717639

申请日：2012-12-17

Applicant: Electronics and Telecommunications Research Institute

Inventor： Min-Ho Cheong ,  Sok-Kyu Lee

IPC: H04L27/00 ,  H04L25/02 ,  H04L1/00 ,  H04L1/06

CPC classification number: H04L25/02 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0031 ,  H04L1/0675

Abstract: An apparatus for transmitting data in a communication system includes: a receiving unit configured to receive feedback information for each of a plurality of stations (STAB) in response to a control frame; an adjusting unit configured to adjust links of the STAB at frequency channels based on the feedback information, and set optimal links for the respective STAB; and a transmitting unit configured to transmit data to the STAB through the optimal links, wherein the feedback information comprises one or more of optimal stream number information, optimal modulation and coding scheme (MCS) information, optimal bandwidth information, average signal-to-noise ratio (SNR) information, space-time information, optimal space-time block coding (STBC) information, group ID information, coding type information, and FB Tx type information.

Abstract translation: 一种用于在通信系统中发送数据的装置，包括：接收单元，被配置为响应于控制帧接收多个站（STAB）中的每一个的反馈信息; 调整单元，被配置为基于所述反馈信息来调整所述STAB在频率信道上的链路，并且为所述STAB设置最佳链路; 以及发送单元，被配置为通过所述最佳链路向所述STAB发送数据，其中所述反馈信息包括最佳流号信息，最佳调制和编码方案（MCS）信息，最佳带宽信息，平均信噪比 比率（SNR）信息，时空信息，最佳时空块编码（STBC）信息，组ID信息，编码类型信息和FB Tx类型信息。

公开(公告)号：US08923209B2

公开(公告)日：2014-12-30

申请号：US13862229

申请日：2013-04-12

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jeeyon Choi ,  Jaewoo Park ,  Sok-Kyu Lee

IPC: H04W4/00 ,  H04L29/06 ,  H04L1/00 ,  H04B7/26

CPC classification number: H04W72/044 ,  H04B7/2656 ,  H04L1/0083 ,  H04L29/06068 ,  H04L69/08 ,  H04L69/22 ,  H04L69/324

Abstract: The present invention relates to a technique relating to a method and apparatus for generating, transmitting, and receiving a data frame having a newly proposed format in a wireless communication system. According to the technique, the method for generating a data frame in a wireless communication system comprises the following steps: generating at least one first subframe; generating at least one second subframe; and generating a data frame including the first and second subframes, wherein the first and second subframes include length information of a MAC protocol data unit (MPDU) contained in the first and second subframes, and the length information of the MPDU contained in the second subframe is zero.

Abstract translation: 本发明涉及一种与在无线通信系统中生成，发送和接收具有新提出的格式的数据帧的方法和装置相关的技术。 根据该技术，在无线通信系统中生成数据帧的方法包括以下步骤：生成至少一个第一子帧; 产生至少一个第二子帧; 以及生成包括第一和第二子帧的数据帧，其中第一和第二子帧包括第一和第二子帧中包含的MAC协议数据单元（MPDU）的长度信息，以及包含在第二子帧中的MPDU的长度信息 是零。

公开(公告)号：US11856578B2

公开(公告)日：2023-12-26

申请号：US17314067

申请日：2021-05-07

Applicant: Electronics and Telecommunications Research Institute

Inventor： Yu-Ro Lee ,  Jung-Bo Son ,  Sok-Kyu Lee

IPC: H04W72/04 ,  H04W72/20 ,  H04L1/00 ,  H04L5/00 ,  H04W48/08 ,  H04B7/0452 ,  H04L1/06 ,  H04W28/06 ,  H04W28/22 ,  H04W84/12 ,  H04W28/04 ,  H04W80/04

CPC classification number: H04W72/20 ,  H04B7/0452 ,  H04L1/007 ,  H04L1/0606 ,  H04L1/0612 ,  H04L5/0023 ,  H04L5/0053 ,  H04L5/0073 ,  H04W48/08 ,  H04L1/0072 ,  H04W28/04 ,  H04W28/06 ,  H04W28/22 ,  H04W80/04 ,  H04W84/12

Abstract: The present invention relates to a method and an apparatus for transmitting control and training symbols to improve transmission efficiency in a multi-user wireless communication system. The method for transmitting the control and training symbols in the multi-user wireless communication system according to one embodiment of the present invention comprises the steps of: determining whether a required transmission rate of each data can be satisfied through channel estimation in each of terminals when different data are simultaneously transmitted to each of the terminals; and transmitting a data frame to each of the terminals, the data frame being composed to discriminate the control and training symbols in each of the terminals using a combination of time, frequency, and code area when the required transmission rate of each data is not satisfied according to the determined result.

公开(公告)号：US11665035B2

公开(公告)日：2023-05-30

申请号：US17151094

申请日：2021-01-15

Applicant: Electronics and Telecommunications Research Institute

Inventor： Il-Gu Lee ,  Eun-Young Choi ,  Sok-Kyu Lee

IPC: H04L27/26 ,  H04L27/00 ,  H04L27/22 ,  H04W72/23 ,  H04L5/00 ,  H04L27/227 ,  H04L27/34 ,  H04W84/12

CPC classification number: H04L27/2601 ,  H04L5/0048 ,  H04L27/0012 ,  H04L27/22 ,  H04L27/2273 ,  H04L27/3444 ,  H04W72/23 ,  H04W84/12

Abstract: A method for automatically detecting a packet mode in a wireless communication system supporting a multiple transmission mode includes: acquiring at least one of data rate information, packet length information and channel bandwidth information from a transmitted frame; and determining the packet mode on the basis of the phase rotation check result of a symbol transmitted after a signal field signal and at least one of the data rate information, the packet length information and the channel bandwidth information acquired from the transmitted frame.

公开(公告)号：USRE49471E1

公开(公告)日：2023-03-21

申请号：US15293258

申请日：2016-10-13

Applicant: Electronics and Telecommunications Research Institute

Inventor： Yun-Joo Kim ,  Jae-Seung Lee ,  Sok-Kyu Lee

IPC: H04W74/08 ,  H04B7/0452

Abstract: The present invention relates to a method for protecting MU-MIMO (Multi User-Multiple Input Multiple Output) data through a multi-RTS/CTS frame exchange in a MU-MIMO based wireless communication system. The method of the present invention comprises: a process where an indicator for VHT data protection is added to an RTS frame, using the structure of an RTS/CTS frame for an existing legacy terminal during the multi RTS/CTS frame exchange; a process where an access point designates and then transmits the duration period of the RTS frame while transmitting the RTS frame; and a process where wireless terminals up to the (n−1)th terminal designate the duration period of the CTS frame as ‘0’ and send the designated duration period, while only the n-th wireless terminal designates NAV for data protection.

公开(公告)号：US11490337B2

公开(公告)日：2022-11-01

申请号：US17134266

申请日：2020-12-26

Applicant: Electronics and Telecommunications Research Institute

Inventor： II-Gu Lee ,  Jeeyon Choi ,  Sok-Kyu Lee

IPC: H04W52/24 ,  H04W24/08 ,  H04W52/26 ,  H04W84/12

Abstract: A transmit power control method of a first station in a wireless LAN (WLAN) system includes: receiving path loss information from an (access point) AP, the path loss information containing a maximum value among path losses between the AP and at least one or more stations included in the WLAN system; controlling a transmit power by using the path loss information; and transmitting a frame according to the controlled transmit power. In said controlling the transmit power by using the path loss information, the transmit power is controlled by using a path loss obtained by adding the maximum value and a path loss between the first station and the AP or by using the path loss between the first station and the AP.

公开(公告)号：US11362705B2

公开(公告)日：2022-06-14

申请号：US16244107

申请日：2019-01-10

Applicant: Electronics and Telecommunications Research Institute

Inventor： Yun-Joo Kim ,  Jae-Seung Lee ,  Sok-Kyu Lee

IPC: H04B7/0452 ,  H04L1/06 ,  H04L1/16 ,  H04L1/18

Abstract: A method and apparatus of transmitting in a wireless communication system is provided. A transmitter generates a group management frame including a group information and position information and a data frame including a group control information having a group identifier for each of a plurality of groups. The group information indicates whether the receiver is a member of each of the plurality of groups. The position information indicates a position of at least one stream corresponding to at least one group of which the receiver is a member.

公开(公告)号：US10863480B2

公开(公告)日：2020-12-08

申请号：US15910879

申请日：2018-03-02

Applicant: Electronics and Telecommunications Research Institute

Inventor： Il-Gu Lee ,  Sok-Kyu Lee ,  Hyun-Kyu Chung ,  Dae-Sik Kim

IPC: H04W72/04 ,  H04L1/00 ,  H04W74/00 ,  H04W24/02

Abstract: A method and apparatus of accessing a channel in a wireless local area network is provided. A destination station receives a request to send (RTS) frame to allocate a network allocation vector from a source station over a first bandwidth and transmits a clear to send (CTS) frame over a second bandwidth to the source station in response to the RTS frame. The second bandwidth is dynamically determined when a first parameter has a predetermined value.