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51.发明公开公开(公告)号：US20240235754A1
公开(公告)日：2024-07-11
申请号：US18615499
申请日：2024-03-25
Inventor： Yutaka MURAKAMI , Yoshio Urabe , Tomohiro Kimura , Mikihiro Ouchi
CPC classification number: H04L5/0044 , H04J1/02 , H04J3/02 , H04L1/0075 , H04L27/265 , H04L27/26522 , H04J11/00 , H04J2011/0016 , H04L5/0007 , H04L5/0053
Abstract: A transmitting method includes: configuring a frame using a plurality of orthogonal frequency-division multiplexing (OFDM) symbols, by allocating time resources and frequency resources to a plurality of transmission data; and transmitting the frame, wherein the frame includes a first period in which a preamble which includes information on a frame configuration of the frame is transmitted, and a second period in which the plurality of transmission data are transmitted by at least one of time division and frequency division, and among the plurality of OFDM symbols, OFDM symbols included in the second period include pilot symbols arranged along a time axis with a predetermined spacing therebetween, and a predetermined number of data symbols.
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公开(公告)号：US20240214161A1
公开(公告)日：2024-06-27
申请号：US18576631
申请日：2022-05-10
Inventor： Yutaka MURAKAMI
IPC: H04L5/00
CPC classification number: H04L5/0053 , H04L5/0007
Abstract: This wireless device comprises: a wireless unit that carries out wireless communication by frame units having a first resource group divided in a frequency direction and a second resource group divided in a time direction; and a control unit that selects, from the first and second resource groups included in the frame units, a resource to be used for sensing.
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公开(公告)号：US20240214071A1
公开(公告)日：2024-06-27
申请号：US18599891
申请日：2024-03-08
Inventor： Yutaka MURAKAMI
IPC: H04B10/116 , B64D11/00 , H04B10/2575 , H04W12/06 , H04W48/08 , H04W48/16 , H04W48/20 , H04W64/00 , H04W84/12
CPC classification number: H04B10/116 , B64D11/0015 , H04B10/25752 , H04W12/06 , H04W48/08 , H04W48/16 , H04W48/20 , H04W84/12 , H04W64/00
Abstract: A terminal (1050) includes a light receiver (151) that receives a light signal emitted by an apparatus (1000), the light signal including an identifier (SSID) of at least one base station (470); a receiver (153) that performs a reception process on the received light signal to output reception data; a data analyzer (155) that selects one base station based on the identifier of the at least one base station that is included in the reception data; and a radio device (453) that establishes a wireless connection with the selected base station (470) by using the identifier of the base station (470) and wirelessly communicates with the base station (470).
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公开(公告)号：US20240113781A1
公开(公告)日：2024-04-04
申请号：US18538453
申请日：2023-12-13
Inventor： Yutaka MURAKAMI , Nobuhiko Hashida
IPC: H04B10/116 , H04B10/85 , H04N7/22
CPC classification number: H04B10/116 , H04B10/85 , H04N7/22
Abstract: A communication system includes: a plurality of cameras that generate image data by capturing images; a server that stores the image data generated by each of the plurality of cameras; and a plurality of transmission devices in one-to-one correspondence with the plurality of cameras. Each of the plurality of transmission devices transmits light including, as a visible light communication signal, information related to communication for accessing a storage location at which the image data generated by a corresponding one of the plurality of cameras is stored in the server.
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公开(公告)号：US20240080894A1
公开(公告)日：2024-03-07
申请号：US18388975
申请日：2023-11-13
Inventor： Yutaka MURAKAMI , Nobuhiko HASHIDA
IPC: H04W74/08 , H04W72/0453 , H04W72/23 , H04W74/00 , H04W80/02
CPC classification number: H04W74/0816 , H04W72/0453 , H04W72/23 , H04W74/008 , H04W80/02
Abstract: An access point includes a first interface that wirelessly communicates using a first band; a second interface that wirelessly communicates using a second band; and a controller that selects one type of request to send (RTS)/clear to send (CTS) control from among three mutually different types using at least one of the first interface and the second interface, and carries out the selected one type of RTS/CTS control with a terminal.
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Patent Agency Ranking
公开(公告)号：US20240080105A1
公开(公告)日：2024-03-07
申请号：US18509547
申请日：2023-11-15
Inventor： Yutaka MURAKAMI , Nobuhiko HASHIDA , Ryutaro MONDEN
IPC: H04B10/54 , H04B10/116 , H04B10/508
CPC classification number: H04B10/541 , H04B10/116 , H04B10/508 , H04B10/516
Abstract: A transmission method includes: in a first period, causing a light source to emit light having a first luminance; and in a second period, causing the light source to transmit an optical signal by causing the light source to alternately emit light having a second luminance and light having a third luminance lower than the second luminance.
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公开(公告)号：US20230344481A1
公开(公告)日：2023-10-26
申请号：US18214661
申请日：2023-06-27
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
IPC: H04B7/06 , H04B7/0408
CPC classification number: H04B7/0617 , H04B7/061 , H04B7/0408
Abstract: A transmitting device includes a plurality of transmission antennas, and includes: a signal processor which generates a first baseband signal by modulating data of a first stream, and a second baseband signal by modulating data of a second stream; and a transmitter which generates, from the first baseband signal, first transmission signals having different directivities, generates, from the second baseband signal, second transmission signals having different directivities, and transmits the first transmission signals and the second transmission signals at a same time.
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公开(公告)号：US20230327685A1
公开(公告)日：2023-10-12
申请号：US18334905
申请日：2023-06-14
Inventor： Yutaka MURAKAMI
CPC classification number: H03M13/2792 , H03M13/1102 , H03M13/23 , H03M13/235 , H03M13/353 , H03M13/6502 , H03M13/6516 , H04L1/0041
Abstract: A transmission apparatus includes a signal processing circuit configured to obtain information data bits to be transmitted; add known information data bits to the information data bits to generate first data blocks; perform error-correction coding on the first data blocks to generate first coded data blocks including parity data blocks such that the first coded data blocks satisfy a first code rate; remove the known information data bits from the first coded data blocks to generate second coded data blocks, the second coded data blocks satisfying a second code rate different from the first code rate; and modulate the second coded data blocks using a modulation scheme to generate a modulated signal, which is then transmitted. A number of the known information data bits depends on a number of the information data bits such that the first code rate is fixed regardless of the number of the information data bits.
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公开(公告)号：US20230291512A1
公开(公告)日：2023-09-14
申请号：US18102385
申请日：2023-01-27
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI , Hiroyuki MOTOZUKA
IPC: H04L5/00 , H04B17/318 , H04B7/0408 , H04B7/0456 , H04L27/04 , H04L27/26
CPC classification number: H04L5/0023 , H04B7/0408 , H04B7/0456 , H04B17/318 , H04L5/0007 , H04L5/0048 , H04L27/04 , H04L27/2601 , H04L27/26362 , H04L27/2636
Abstract: A transmission device that improves data reception quality includes: a weighting synthesizer that generates a first precoded signal and a second precoded signal from a first baseband signal and a second baseband signal, respectively; a phase changer that applies a phase change of i x Δλ to the second precoded signal; an inserter that inserts a pilot signal into the second precoded signal applied with the phase change; and a phase changer that applies a phase change to the second precoded signal applied with the phase change and inserted with the pilot signal. Δλ satisfies π/2 radians
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60.发明公开公开(公告)号：US20230163904A1
公开(公告)日：2023-05-25
申请号：US18093522
申请日：2023-01-05
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
CPC classification number: H04L5/0044 , H04L1/0075 , H04L27/26522 , H04L27/265 , H04J1/02 , H04J3/02 , H04J11/00
Abstract: Provided are a frame configuring unit configured to configure a frame using a plurality of orthogonal frequency-division multiplexing (OFDM) symbols, by allocating time resources and frequency resources to a plurality of transmission data, and a transmitter which transmits the frame. The frame includes a first period in which a preamble which includes information on a frame configuration of the frame is transmitted, a second period in which a plurality of transmission data are transmitted by time division, a third period in which a plurality of transmission data are transmitted by frequency division, and a fourth period in which a plurality of transmission data are transmitted by time division and frequency division.
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