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公开(公告)号：US12200628B2
公开(公告)日：2025-01-14
申请号：US17967949
申请日：2022-10-18
Inventor： Il-Gu Lee , Jeeyon Choi , Sok-Kyu Lee
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.
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公开(公告)号：US20240251411A1
公开(公告)日：2024-07-25
申请号：US18628040
申请日：2024-04-05
Inventor： Il-Gu Lee , Sok-Kyu Lee , Hyun-Kyu Chung , Dae-Sik Kim
CPC classification number: H04W72/20 , H04L5/0094 , H04L47/70 , H04W74/002 , H04L1/0002 , H04L1/0006 , 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.
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公开(公告)号：US11742905B2
公开(公告)日：2023-08-29
申请号：US17838212
申请日：2022-06-11
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.
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公开(公告)号：US10826575B2
公开(公告)日：2020-11-03
申请号：US15937590
申请日：2018-03-27
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.
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5.发明授权公开(公告)号：US10567207B2
公开(公告)日：2020-02-18
申请号：US16283872
申请日：2019-02-25
Inventor： Woo-Yong Lee , Sok-Kyu Lee
Abstract: A method of configuring a preamble of a downlink frame for synchronization in data frame transmission of a 60 GHz a wireless local area network system, the method comprising arranging a short preamble having a plurality of repetitive S symbols, and an IS symbol, and arranging a long preamble having a long cyclic prefix (CP) and a plurality of L symbols for frame synchronization and symbol timing by performing auto-correlation according to the length of window of the auto-correlation.
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Patent Agency Ranking
公开(公告)号：USRE47522E1
公开(公告)日：2019-07-16
申请号：US13684283
申请日：2012-11-23
Inventor： Hee-Jung Yu , Eun-Young Choi , Chan-Ho Yoon , Jung-Bo Son , Il-Gu Lee , Deuk-Su Lyu , Tae-hyun Jeon , Seung-Wook Min , Sok-Kyu Lee , Seung-Chan Bang , Seung-Ku Hwang
Abstract: The present invention relates to an orthogonal frequency division multiplexing wireless local area network (LAN) transmitting/receiving system for providing expanded service coverage, and a method thereof. A first OFDM modulation is performed for an even-numbered time, and a second OFDM modulation is performed for an odd-numbered time. A transmitting frame including a plurality of signal fields according to the first and second OFDM modulation is transmitted. The receiving system determines whether a signal field is repeatedly generated in the frame. If the signal field is not repeatedly generated, corresponding demodulation is performed. If repeatedly performed, the signal field is demodulated by using first bit allocation information and second bit allocation information having a ½ value of the first bit allocation information. A data field is demodulated according to the demodulated signal field.
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7.发明授权公开(公告)号：US10257011B2
公开(公告)日：2019-04-09
申请号：US15686656
申请日：2017-08-25
Inventor： Woo-Yong Lee , Sok-Kyu Lee
Abstract: A method of configuring a preamble of a downlink frame for synchronization in data frame transmission of a 60 GHz wireless local area network system, the method comprising arranging a short preamble having a plurality of repetitive S symbols, and an IS symbol, and arranging a long preamble having a long cyclic prefix (CP) and a plurality of L symbols for frame synchronization and symbol timing by performing auto-correlation according to the length of window of the auto-correlation.
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公开(公告)号：US10231218B2
公开(公告)日：2019-03-12
申请号：US14755329
申请日：2015-06-30
Inventor： Yun Joo Kim , Jee Yon Choi , Sok-Kyu Lee
Abstract: The present invention relates to a method for efficient transmission of a request frame such as an RTS/CTS frame and a response frame in response to the request frame in a multi-user based wireless communication system. The method of the present invention comprises: a process where wireless terminals transmit a response frame at their own response frame transmission time through a request frame that contains information about a plurality of wireless terminals and information about the response frame transmission time of the respective wireless terminals; a process where the respective wireless terminals transmit a response frame according to a token scheme such that the response frame is transmitted to a final access point; and a process where only a representative wireless terminal selected depending on a given wireless environment receives the response frame.
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公开(公告)号：US09929784B2
公开(公告)日：2018-03-27
申请号：US14633036
申请日：2015-02-26
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.
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公开(公告)号：US09794912B2
公开(公告)日：2017-10-17
申请号：US15237000
申请日：2016-08-15
Inventor： Yun-Joo Kim , Sok-Kyu Lee
CPC classification number: H04W72/005 , H04L45/74 , H04L69/22 , H04W4/06 , H04W28/06 , H04W72/0406
Abstract: A method for simultaneously transmitting packets having different lengths to two or more users in a wireless communication system includes: generating the packets to transmit to the respective users, the packets containing information on the maximum transmission length of the packets having different lengths; and simultaneously transmitting the generated packets to the respective users. The maximum transmission length is represented by the number of symbols, and each of the packets sequentially contains control information required for transmitting the packet, data, a tail field, and a PHY pad field, and is generated by inserting a MAC pad between the control information and the data such that the tail field and the PHY pad field are positioned at the last byte of the last symbol of the maximum transmission length.
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