Abstract: A wireless transmission device transmits a radio signal with a plurality of beam patterns and outputs transmission beam identifiers corresponding to the beam patterns to an object detection device, a wireless reception device receives the radio signal transmitted by the wireless transmission device with a plurality of beam patterns, measures received signal strength for each of the beam patterns and outputs reception beam identifiers and the received signal strength to the object detection device, and the object detection device detects an object within a detection area on the basis of the transmission beam identifiers, the reception beam identifiers and the received signal strength. This enables device-free object detection by utilizing a beamforming function, so that it is possible to achieve high detection accuracy while preventing increase in cost.

Abstract: A relay system includes: one or more radiation units configured to form a beam in a predetermined direction by radiating radio waves from each of a plurality of elements; a detection unit configured to detect a physical environment on a radio wave propagation path that affects the beam formed by the radiation unit; a direction determination unit configured to determine a direction in which the radiation unit should form the beam based on the physical environment detected by the detection unit; a phase calculation unit configured to calculate a phase of radio wave to be radiated by each of the plurality of elements such that the radiation unit forms a beam in the direction determined by the direction determination unit; and a phase control unit configured to control the phase of the radio wave radiated by each of the plurality of elements based on the phase calculated.

Abstract: 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.

Abstract: A reflection direction control method includes an arrival direction estimation step of estimating an arrival direction of radio waves transmitted by a wireless terminal to one or more reflection units each including a plurality of reflection elements capable of dynamically changing phase characteristics when the radio wave is reflected, a phase control step of controlling a phase of a radio wave reflected by each of the plurality of reflection elements so that the reflection unit reflects, in a predetermined direction, the radio wave transmitted from the estimated arrival direction, and a switching step of switching between an antenna mode in which the reflection unit is caused to receive the radio wave of which the arrival direction is estimated and a reflection mode in which the reflection unit is caused to reflect the radio wave.

Abstract: A radio communication method of connecting a base station with a plurality of terminal stations, the base station including a plurality of radio communication units compatible with a plurality of communication standards or communication schemes, the method including collecting, from each of the plurality of terminal stations, communication quality information representing a communication quality of the terminal station, collecting, from each of the plurality of terminal stations, communication performance information representing a communication performance of the terminal station, collecting, from each of the plurality of terminal stations, identifier information that identifies the terminal station, calculating, based on the communication quality information, the communication performance information and the identifier information that are collected, a setting policy including a setting for each of the plurality of radio communication units, and a switching policy of setting a condition for switching the pl

Abstract: Estimating a propagation environment of a radio wave using a scale model. The method includes the following steps. The scale model is created. In the scale model, a light source capable of emitting directional light and scanning an irradiation direction is installed, regarding the light source as a transmission station of a radio wave. The light source scans an inside of the scale model, and a center light generation state in which center light directed to a measurement point set in the scale model is generated is detected in a process of scanning. A light receiving sphere is installed such that a center coincides with the measurement point. A direction connecting a position of an irradiated point appearing on the light receiving sphere and a position of the center under the center light generation state is estimated as an arrival direction of the light reaching the measurement point.

Abstract: The present disclosure relates to a propagation environment estimation method suitable for environment estimation of a wireless signal using a scale model. The scale model is created. In the scale model, a light source regarded as a transmission station of a radio wave is installed. In the scale model, a light receiving element regarded as a receiver of the radio wave is installed. The light source irradiates a measurement range set in the scale model, and the light receiving element measures a light reception level. Data of the light reception level acquired in the previous step is converted into a reception level of the radio wave.

Abstract: The present disclosure relates to a propagation environment estimation method suitable for environment estimation of a wireless signal using a scale model. The method includes the following steps. The scale model is created. A light source regarded as a transmission station of the radio wave is installed in the scale model, and a measurement range in the scale model is irradiated by the light source. The measurement range irradiated by the light source is captured, and gradation of light obtained by the capture is converted into a reception level of the radio wave.

Abstract: A wireless communication system includes a sensing unit that detects an obstacle currently present between a transmitting station and a receiving station. There is an environment memory that stores information on a detection result of the sensing unit, an environment prediction unit that predicts a variation in a radio wave propagation environment between the transmitting station and the receiving station from the information stored in the environment memory. There is further a simulation calculation unit that simulates an environment in which a communication path between the receiving station and a reflector and a communication path between the transmitting station and the reflector are a line-of-sight environment on the basis of a prediction result of the environment prediction unit and calculates a control parameter of the reflector that achieves the environment. Further, a reflector control unit controls the reflector in accordance with the control parameter calculated by the simulation calculation unit.

Abstract: A base station according to an embodiment is a base station that performs wireless communication with a terminal using a directional antenna within a predetermined area, the base station including: acquisition circuitry configured to acquire data from a database that holds data indicating an antenna directivity suitable for each state of a terminal or each arrival direction of a radio wave from the terminal measured in a scale model in which a structure within a predetermined area is reduced at a predetermined scale factor; collection circuitry configured to collect a state of a terminal or an arrival direction of a radio wave from the terminal in practice within a predetermined area; and controller configured to control directivity of the directional antenna with respect to the terminal in practice within a predetermined area based on the state of the terminal or the arrival direction and data.

Abstract: A propagation model estimation system according to an embodiment includes a selection unit that selects an area for which a radio wave propagation model is to be estimated, a modeling unit that models a radio wave reflection characteristic in the selected area, a determination unit that determines a scale ratio of the selected area, a frequency scale model based on the scale ratio, and at least one material based on the modeled radio wave reflection characteristic and the frequency scale model, a creation unit that creates an area scale model in which a structure in the selected area is reduced at the scale ratio using the material by means of a 3D printer, an arrangement unit that arranges, in the area scale model, at least one transmitting station that transmits a radio wave based on the frequency scale model and at least one receiving station that receives the radio wave transmitted by the transmitting station while moving, a measurement unit that measures a propagation characteristic of the radio wave rec

Abstract: A radio terminal station device includes a communication unit, an information acquisition unit, a threshold calculation unit, a detection unit, and a system selection unit. The communication unit selects any one of a plurality of different communication systems and performs a radio communication. The information acquisition unit acquires information including a communication state of the radio terminal station device and at least communication states of other radio terminal station devices. The threshold calculation unit calculates a threshold value for detecting deterioration of the communication state of the radio terminal station device. The detection unit detects the deterioration of the communication state of a communication system used by the radio terminal station device.

Abstract: A wireless communication system includes a base station to which a plurality of terminal stations are connectable and a control unit that controls the base station.

Abstract: The position estimation device includes a wireless communication control unit that determines a transmission command and transmits the transmission command to a wireless communication unit of a fixed terminal installed in the same environment as a host device or a wireless communication unit of a position estimation target, a wireless communication unit that receives a wireless signal or the wireless communication unit based on the transmission command and acquires channel information regarding radio wave propagation from the wireless signal, an input feature amount generation unit that converts the channel information into an input feature amount inputtable to a position estimation model, and a position estimation model using unit that estimates and calculates a position of the position estimation target by inputting the input feature amount to a position estimation model obtained by modeling a relationship between channel information and position information by machine learning.

Abstract: 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.

Abstract: The amusement device according to the present disclosure includes: a laser irradiation unit 1 that emits a laser beam; a reflector 3 that reflects the laser beam emitted from the laser irradiation unit 1; and a laser light receiving unit 2 that serves as a target onto which the laser beam emitted from the laser irradiation unit 1 is incident. The amusement device according to the present disclosure further includes an obstacle 5 that can block the laser beam emitted from the laser irradiation unit 1. The laser irradiation unit 1 is configured to enable the emission direction of the laser beam to be changed by an operation by a user. The reflector 3 is configured to enable the direction of a reflection surface to be changed by an operation by the user. The obstacle 5 is configured to be movable by an operation by the user.

Abstract: A transmission space reproduction method according to an embodiment includes: a propagation characteristics calculation step of performing simulation while sequentially changing a parameter in a reverberation chamber used to reproduce propagation characteristics so as to calculate propagation characteristics in the reverberation chamber, a machine learning step of forming a learning model for a calculated parameter by machine learning using actually measured propagation characteristics and parameters, a parameter generation step of generating a parameter corresponding to propagation characteristics to be reproduced using the formed learning model, and a reproduction execution step of controlling a channel emulator based on the generated parameter so as to perform processing of forming a transmission space having the propagation characteristics to be reproduced in the reverberation chamber.

Abstract: A radio communication method of connecting a base station with a plurality of terminal stations, the base station including a plurality of radio communication units compatible with a predetermined communication standard, the method including collecting additional-line information including information regarding whether each terminal station is compatible with additional communication standard; collecting request information including a request in the predetermined communication standard of each terminal station; collecting identifier information that identifies each terminal station; calculating, based on the additional-line information, the request information and the identifier information that are collected, a setting policy including a setting for each radio communication unit, and a switching policy of setting a condition for switching the plurality of radio communication units; and setting, for each radio communication unit, the terminal station to be connected based on the setting policy and the switch

Abstract: 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.

Abstract: 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.