公开(公告)号：US10230435B2

公开(公告)日：2019-03-12

申请号：US14051355

申请日：2013-10-10

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04B7/04 ,  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：US11742905B2

公开(公告)日：2023-08-29

申请号：US17838212

申请日：2022-06-11

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04B7/0452 ,  H04L1/06 ,  H04L1/1607 ,  H04L1/1829

CPC classification number: H04B7/0452 ,  H04L1/06 ,  H04L1/1685 ,  H04L1/1848

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：US10826575B2

公开(公告)日：2020-11-03

申请号：US15937590

申请日：2018-03-27

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04B7/0452 ,  H04W4/08 ,  H04W8/18 ,  H04W84/12

Abstract: The present invention relates to methods for transmitting a frame by grouping a plurality of wireless terminals in a multiuser based wireless communication system. The present invention includes a method for transmitting a frame by including information about multiple receiver terminals in a MAC frame, another method for transmitting a frame by allocating group addresses and then using a corresponding group address for frame transmission, and yet another method for transmitting a frame by using a unique group sequence number that is allocated to each group and group control information that contains bitmap information. The group control information is included in a destination address field of a MAC layer, or in a signal field of a physical layer, or in both the MAC layer and the physical layer.

公开(公告)号：US09929784B2

公开(公告)日：2018-03-27

申请号：US14633036

申请日：2015-02-26

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04B7/04 ,  H04B7/0452 ,  H04W4/08 ,  H04W8/18 ,  H04W84/12

CPC classification number: H04B7/0452 ,  H04W4/08 ,  H04W8/186 ,  H04W84/12

Abstract: The present invention relates to methods for transmitting a frame by grouping a plurality of wireless terminals in a multiuser based wireless communication system. The present invention includes a method for transmitting a frame by including information about multiple receiver terminals in a MAC frame, another method for transmitting a frame by allocating group addresses and then using a corresponding group address for frame transmission, and yet another method for transmitting a frame by using a unique group sequence number that is allocated to each group and group control information that contains bitmap information. The group control information is included in a destination address field of a MAC layer, or in a signal field of a physical layer, or in both the MAC layer and the physical layer.

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：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.