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1.发明授权公开(公告)号：US12127113B2
公开(公告)日：2024-10-22
申请号：US17632266
申请日：2019-08-07
发明人： Toshiro Nakahira , Hirantha Abeysekera , Koichi Ishihara , Tomoki Murakami , Takafumi Hayashi , Yasushi Takatori
摘要： Included are a plurality of base stations to which a plurality of terminal stations are connectable and a control station that controls each of the base stations. The control station includes a network communication unit that receives, from each of the base stations, base station information indicating the base station, wireless environment information indicating a reception signal received by the base station from another of the base stations and a signal intensity thereof, and terminal station information indicating the terminal station connected to the base station and a signal intensity and a calculation unit that calculates, based on the base station information, the wireless environment information, and the terminal station information each received from each of the base stations, connection control information for controlling a connection permission from each of the base stations to each of the terminal stations. Each of the base stations includes a connection control unit that controls, based on the connection control information, the connection permission to each of the terminal stations.
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公开(公告)号：US12074654B2
公开(公告)日：2024-08-27
申请号：US17603956
申请日：2020-04-20
发明人： Toshiro Nakahira , Tomoki Murakami , Hirantha Abeysekera , Koichi Ishihara , Takafumi Hayashi , Yasushi Takatori
摘要： A method includes collecting, as environment information, a radio environment represented by a signal received at a plurality of radio communication units from another base station, each of the plurality of radio communication units being switchable between a normal mode in which the radio communication unit performs radio communication as a base station and a subordinate mode in which the radio communication unit performs radio communication as a virtual terminal station, calculating test conduct information for each base station based on base station performance information representing a performance of each base station and the environment information, and conducting an operation test of each base station by, based on the test conduct information, setting any of the radio communication units to the normal mode, switching the radio communication units of the other base station to the subordinate mode, and performing radio communication with each other.
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公开(公告)号：US12074640B2
公开(公告)日：2024-08-27
申请号：US17785370
申请日：2019-12-16
发明人： Ryota Shiina , Tomohiro Taniguchi , Kazutaka Hara , Shinya Tamaki , Tomoki Murakami , Toshiro Nakahira
IPC分类号： H04B10/114
CPC分类号： H04B10/114
摘要： An object is to provide a terminal device, a communication method, and a communication system which are capable of acquiring accurate optical ID information regardless of the position of the terminal device and the light receiving angle.
The terminal device, the communication method, and the communication system according to the present invention each sets a threshold value for the illuminance of a received optical signal by using a moving average method, a weighted moving average method, or an exponential moving average, so that the optical signal can be binarized with a threshold value according to a change in the position of the terminal device, the light receiving angle, or the like. Information from other sensors may be used to set the threshold value.-
4.发明授权公开(公告)号：US11956662B2
公开(公告)日：2024-04-09
申请号：US17610785
申请日：2019-06-10
发明人： Toshiro Nakahira , Hirantha Abeysekera , Tomoki Murakami , Koichi Ishihara , Takafumi Hayashi , Yasushi Takatori
CPC分类号： H04W28/0231 , H04W16/10 , H04W84/12 , H04W92/12
摘要： A wireless communication system in which wireless stations perform transmission, a plurality of wireless modules that are operated in a shared frequency band being installed in the wireless stations, wherein the wireless stations each include means for notifying a control device of environment information that includes capacity information regarding the wireless station and information regarding a surrounding wireless environment, and setting frequency channels in the plurality of wireless modules, the wireless stations being notified of the frequency channels by the control device, and the control device includes means for calculating a frequency channel of each wireless module of each wireless station based on the environment information collected from each wireless station, following a control guideline that is determined in advance, and notifying the wireless stations of the frequency channels.
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公开(公告)号：US11950115B2
公开(公告)日：2024-04-02
申请号：US17603769
申请日：2020-04-17
发明人： Toshiro Nakahira , Tomoki Murakami , Hirantha Abeysekera , Koichi Ishihara , Takafumi Hayashi , Yasushi Takatori
摘要： A measurement station collects radio base station performance information related to a radio communication performance of each radio base station, radio connection information related to a radio communication performance and a communication status of a corresponding radio terminal station, generates a measurement condition and an expected measurement result based on the radio base station performance information and the radio connection information, and notifies a measurement control signal corresponding to the measurement condition to the radio terminal station through the radio base station; the radio terminal station performs a communication setting of an own station based on the notified measurement control signal, and notifies a measurement preparation status to the measurement station; and the measurement station measures the radio communication performance by causing a flow of a measurement traffic to the radio terminal station through the radio base station, acquiring a measurement result, and determining whether the measurement result is within a range of the expected measurement result.
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公开(公告)号：US11929781B2
公开(公告)日：2024-03-12
申请号：US17790990
申请日：2020-01-23
发明人： Ryota Shiina , Tomohiro Taniguchi , Kazutaka Hara , Shinya Tamaki , Tomoki Murakami , Toshiro Nakahira
摘要： An objective is to provide a terminal device, a communication method, and a communication system in which the time taken by connection operations/authentication operations does not increase proportionally with the pattern length, even if the transmitting side and the receiving side are not synchronized. A terminal device, a communication method, and a communication system according to the present invention create n pieces of signal information (n-bit patterns) by sequentially shifting each bit of a single piece of received signal information (n-bit pattern) one bit at a time. Through the above, signal information time-shifted by one bit each is obtained. Thus, even if the transmitting side and the receiving side are not synchronized, one of the n pieces of signal information is a signal synchronized with the transmitting side. Thereafter, the signal synchronized with the transmitting side can be detected by a brute-force calculation with the patterns (ID information) in the list.
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公开(公告)号：US20240036227A1
公开(公告)日：2024-02-01
申请号：US18266515
申请日：2020-12-17
发明人： Shinya Otsuki , Tomoki Murakami , Tomoaki Ogawa
摘要： A capture device which captures propagation path information communicated between the two or more wireless devices and transmits the propagation path information to a first detection device and a second detection device; and a learning model generation device which generates a learning model for object detection using supervised machine learning are provided. The first detection device performs object detection between the wireless devices using a learning model generated by the learning model generation device, the second detection device performs object detection with higher accuracy than the first detection device, and the learning model generation device generates and updates a learning model which is used by the first detection device as teacher data using determination data including object detection results of the second detection device. This makes it possible to easily generate a learning model using supervised machine learning without spending time or manpower.
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公开(公告)号：US11700560B2
公开(公告)日：2023-07-11
申请号：US17619663
申请日：2019-06-20
IPC分类号： H04B10/00 , H04W36/08 , H04B10/079 , H04B10/112 , H04J14/00
CPC分类号： H04W36/08 , H04B10/0795 , H04B10/112
摘要： The present disclosure aims to enable communication to be performed with stable quality even when a user uses a terminal while moving. In the wireless communication system according to the present disclose, a switching control unit 15 sets switching illuminance pth for maintaining illuminance of an optical signal received by a terminal 91 at requested illuminance corresponding to throughput or higher during the time until connection switching between the communication with an optical wireless access point 92 and the communication with an RF wireless access point 93 is completed, and when the received illuminance p becomes lower than the switching illuminance pth during connection with the optical wireless access point 92, the switching control unit 15 performs connection switching from the optical wireless communication to the RF wireless communication.
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9.发明申请公开(公告)号：US20220286955A1
公开(公告)日：2022-09-08
申请号：US17632266
申请日：2019-08-07
发明人： Toshiro Nakahira , Hirantha Abeysekera , Koichi Ishihara , Tomoki Murakami , Takafumi Hayashi , Yasushi Takatori
摘要： Included are a plurality of base stations to which a plurality of terminal stations are connectable and a control station that controls each of the base stations. The control station includes a network communication unit that receives, from each of the base stations, base station information indicating the base station, wireless environment information indicating a reception signal received by the base station from another of the base stations and a signal intensity thereof, and terminal station information indicating the terminal station connected to the base station and a signal intensity and a calculation unit that calculates, based on the base station information, the wireless environment information, and the terminal station information each received from each of the base stations, connection control information for controlling a connection permission from each of the base stations to each of the terminal stations. Each of the base stations includes a connection control unit that controls, based on the connection control information, the connection permission to each of the terminal stations.
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公开(公告)号：US10158402B2
公开(公告)日：2018-12-18
申请号：US15850120
申请日：2017-12-21
发明人： Tomoki Murakami , Yusuke Asai , Riichi Kudo , Koichi Ishihara , Masato Mizoguchi , Takeo Ichikawa
IPC分类号： H04B7/0452 , H04W28/16 , H04B7/024 , H04B7/06 , H04B7/0456 , H04W88/08 , H04J11/00 , H04L5/00 , H04L27/26
摘要： Interference in preamble signals and pilot signals in cooperative transmission using interference suppressing technology is avoided. A wireless apparatus for transmitting a wireless signal on which directivity control has been performed to stations in a wireless system including at least one wireless apparatus is provided with a known signal generating unit which generates a known signal to be added to the wireless signal, a weighting processing unit which performs weighting on the known signal generated by the known signal generating unit, and a wireless processing unit which transmits the known signal on which the weighting has been performed by the weighting processing unit.
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