公开(公告)号：US20240056198A1

公开(公告)日：2024-02-15

申请号：US18265334

申请日：2020-12-15

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Ryo Miyatake ,  Hiroaki KATSURAI ,  Tomoaki YOSHIDA

IPC: H04B10/80

CPC classification number: H04B10/807

Abstract: An optical power supply system comprising: a power supply optical communication device that supplies power using an optical signal for power supply; and a power reception optical communication device that is driven by power obtained from the optical signal for power supply transmitted from the power supply optical communication device, wherein the power supply optical communication device includes an optical power supply unit that transmits the optical signal for power supply to the power reception optical communication device, and an optical signal generation unit that converts a continuous wave used for frequency conversion of a radio signal received by the power reception optical communication device into an optical signal and transmits the optical signal to the power reception optical communication device, the power reception optical communication device includes a photoelectric conversion unit that converts the optical signal transmitted from the power supply optical communication device into an electric signal of a continuous wave, and an external transmission/reception unit for performing frequency conversion on the radio signal transmitted from the external device.

公开(公告)号：US12034830B2

公开(公告)日：2024-07-09

申请号：US17624107

申请日：2019-07-01

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Kento Yoshizawa ,  Yosuke Fujino ,  Yusuke Asai ,  Daisei Uchida ,  Ryo Miyatake

IPC: H04L7/04 ,  H04W56/00

CPC classification number: H04L7/04 ,  H04W56/001

Abstract: A communication method determination apparatus includes a comparison unit and an instruction unit. The comparison unit obtains a bit string of a portion of a physical header for synchronization from a wireless frame that includes the physical header for synchronization in which information for synchronization in a physical layer is set and a physical data portion in which data of a higher-level layer than the physical layer is set, and compares the obtained bit string with a bit string pattern specific to a communication method targeted for determination. The instruction unit performs communication method determination processing for determining whether or not the communication method targeted for determination is used for the wireless frame, based on a result of comparison. If it is determined that the communication method targeted for determination is not used for the wireless frame, the instruction unit changes the communication method targeted for determination, instructs the comparison unit to newly obtain a bit string of a portion that follows the obtained bit string, from the physical header for synchronization, and to compare the newly obtained bit string with a bit string pattern specific to the post-change communication method targeted for determination, and performs the communication method determination processing again.

公开(公告)号：US11349583B2

公开(公告)日：2022-05-31

申请号：US16973631

申请日：2019-06-05

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Ryo Miyatake ,  Kohei Suzaki ,  Yusuke Asai ,  Hiroyuki Shiba

IPC: H04B17/391 ,  H04B17/309 ,  G01S13/89

Abstract: A measuring robot (1) measures radio waves using a radio wave measuring unit (11) at a measurement point. A self-propelled route control unit (14) controls, in a case that reliability of communication using the radio wave at the measurement point is determined to be low based on one or more of a measurement result by the radio wave measuring unit (11) and information on an obstacle detected by a terrain/obstacle/position detection sensor unit (12), a radio wave measuring unit (11) to measure the radio wave more precisely compared to the measurement of the electromagnetic wave in a case that the reliability of the communication using the radio wave is determined to be high.

公开(公告)号：US11733344B2

公开(公告)日：2023-08-22

申请号：US16973408

申请日：2019-05-21

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Kohei Suzaki ,  Ryo Miyatake ,  Yusuke Asai ,  Hiroyuki Shiba

IPC: G01S5/02 ,  H04B17/27 ,  H04B17/345 ,  G06T7/246 ,  G01S5/00

CPC classification number: G01S5/0278 ,  G01S5/02 ,  G01S5/0215 ,  G06T7/246 ,  H04B17/27 ,  H04B17/345 ,  G01S5/011 ,  G06T2207/30192

Abstract: An interference source hunting method of hunting for an interference source of electromagnetic waves while moving between multiple measurement points, includes the steps of acquiring strength information of electromagnetic waves, estimating a distance from the measurement point to the location of the interference source, based on the strength information, calculating a first presence probability that the interference source is present at each position, based on whether a distance from the measurement point to the position is within the distance, updating second presence probabilities acquired in hunting in the past, based on the first presence probabilities, determining a position obtained by moving, by a predetermined distance, the measurement point toward a position with the second presence probability higher than the second presence probability at the measurement point, as a new measurement point, and determining, in a case where a size of an area in which each of the second presence probabilities is greater than or equal to a predetermined value is less than a predetermined value, that the location of the interference source is within the area.

公开(公告)号：US11277214B2

公开(公告)日：2022-03-15

申请号：US16968839

申请日：2019-02-13

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Ryo Miyatake ,  Hiroyuki Shiba ,  Yusuke Asai ,  Kohei Suzaki

IPC: H04B17/391 ,  H04B17/309 ,  H04W16/18 ,  G01S5/02

Abstract: A synthetic reception strength value in a case of synthesizing indirect waves of radio waves generated due to an obstruction is calculated for each piece of receive antenna coordinate information in consideration of a phase of each indirect wave. Relation information indicating relation between input information and teaching information is generated. The input information is the synthetic reception strength value for each piece of the receive antenna coordinate information corresponding to transmit antenna coordinate information. The teaching information is information indicating a reception state of the radio waves being calculated using a method of actually measuring the radio waves output by the transmit antenna at a position of a receive antenna or a method other than the method of the actual measurement. Strength of the radio waves is estimated by calculating the information indicating the reception state of the radio waves by using the transmit antenna coordinate information for evaluation and the generated relation information.

公开(公告)号：US20210250110A1

公开(公告)日：2021-08-12

申请号：US16973631

申请日：2019-06-05

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Ryo Miyatake ,  Kohei Suzaki ,  Yusuke Asai ,  Hiroyuki Shiba

IPC: H04B17/391 ,  G01S13/89 ,  H04B17/309

Abstract: A measuring robot (1) measures radio waves using a radio wave measuring unit (11) at a measurement point. A self-propelled route control unit (14) controls, in a case that reliability of communication using the radio wave at the measurement point is determined to be low based on one or more of a measurement result by the radio wave measuring unit (11) and information on an obstacle detected by a terrain/obstacle/position detection sensor unit (12), a radio wave measuring unit (11) to measure the radio wave more precisely compared to the measurement of the electromagnetic wave in a case that the reliability of the communication using the radio wave is determined to be high

公开(公告)号：US20240039642A1

公开(公告)日：2024-02-01

申请号：US18265333

申请日：2020-12-15

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Ryo Miyatake ,  Hiroaki KATSURAI ,  Tomoaki YOSHIDA

IPC: H04B10/80

CPC classification number: H04B10/807

Abstract: An optical power supply system includes a power supply optical communication device that supplies power using an optical signal for power supply and a power reception optical communication device that is driven by power obtained from the optical signal for power supply transmitted from the power supply optical communication device, wherein the power supply optical communication device includes an optical power supply unit that transmits the optical signal for power supply to the power reception optical communication device and a data transmission/reception unit that transmits the optical signal for power supply to the power reception optical communication device when there is no data to be transmitted to the power reception optical communication device, and the power reception optical communication device includes a power storage unit that stores power obtained based on the optical signal for power supply transmitted from the optical power supply unit and the optical signal for power supply transmitted from the data transmission/reception unit.

公开(公告)号：US20220279530A1

公开(公告)日：2022-09-01

申请号：US17623685

申请日：2019-07-01

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Kento Yoshizawa ,  Ryo Miyatake ,  Yusuke Asai ,  Daisei Uchida

IPC: H04W72/12

Abstract: A control device of the present invention is for provision in a gateway device that includes multiple communication units that perform wireless communication with terminal devices using different communication methods. Based on communication unit individual information that is acquired from the communication units and includes information indicating at least characteristics of the communication methods of the communication units, operations of the communication units are scheduled so as to prevent the overlapping of periods in which the communication units perform signal transmission/reception with the terminal devices.

公开(公告)号：US11979839B2

公开(公告)日：2024-05-07

申请号：US17603647

申请日：2020-04-06

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Ryo Miyatake ,  Yusuke Asai ,  Daisei Uchida ,  Kazunori Akabane

IPC: H04W52/24 ,  H04B7/08 ,  H04B17/345 ,  H04W16/28

CPC classification number: H04W52/243 ,  H04B7/08 ,  H04B17/345 ,  H04W16/28

Abstract: An interference wave arithmetic operation method performed by a wireless communication system including a plurality of antennas, the method including: determining an interferer antenna on the basis of information regarding directivity, a position, and an orientation of each of the plurality of antennas; and calculating interference wave reception intensity of a victim antenna using an interference wave from the determined interferer antenna.

公开(公告)号：US11895641B2

公开(公告)日：2024-02-06

申请号：US17623685

申请日：2019-07-01

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Kento Yoshizawa ,  Ryo Miyatake ,  Yusuke Asai ,  Daisei Uchida

IPC: H04W72/12 ,  H04W88/16

CPC classification number: H04W72/1215 ,  H04W88/16

Abstract: A control device of the present invention is for provision in a gateway device that includes multiple communication units that perform wireless communication with terminal devices using different communication methods. Based on communication unit individual information that is acquired from the communication units and includes information indicating at least characteristics of the communication methods of the communication units, operations of the communication units are scheduled so as to prevent the overlapping of periods in which the communication units perform signal transmission/reception with the terminal devices.