A method for a system includes forming within an app running upon a user smart-device, an ephemeral ID having data associated with a server and anonymous data, outputting the ephemeral ID to a first receiver associated with a first computer and to a second receiver associated with a second computer system separate from the first, receiving from the first receiver an identifier and a nonce, providing the identifier and the nonce to the server, receiving from the server a token associated with the first computer system authorizing access to the first computer system but not the second computer system by the user smart-device, storing the token for facilitated authentication of the user smart-device, and providing the token to the first receiver.

A node (200) is provided for use in a LiFi system (100) to provide LiFi signals to an endpoint device (130). The node (200) comprises a visible light source (220) for emitting modulated visible light and non-modulated visible light to provide illumination, and an infrared light source (210) for emitting modulated infrared light. The node (200) is configured to output a LiFi signal at a first one or more frequencies via the infrared light source (210) for reception by said endpoint device (130). In response to receiving input to provide illumination, the node (200) turns on the visible light source (220) to provide said illumination and automatically transfers an output of the LiFi signal from the infrared light source (210) to the visible light source (220) by outputting the LiFi signal at said first one or more frequencies via the visible light source (220) for reception by said endpoint device (130), and turning off the infrared light source (210).

A node (200) is provided for use in a LiFi system (100) to provide LiFi signals to an endpoint device (130). The node (200) comprises a visible light source (220) for emitting modulated visible light and non-modulated visible light to provide illumination, and an infrared light source (210) for emitting modulated infrared light. The node (200) is configured to output a LiFi signal at a first one or more frequencies via the infrared light source (210) for reception by said endpoint device (130). In response to receiving input to provide illumination, the node (200) turns on the visible light source (220) to provide said illumination and automatically transfers an output of the LiFi signal from the infrared light source (210) to the visible light source (220) by outputting the LiFi signal at said first one or more frequencies via the visible light source (220) for reception by said endpoint device (130), and turning off the infrared light source (210).

A first interface of a first device displays a plurality of objects. The first device displays a second interface when detecting a first input for a first object in the plurality of objects. The second interface includes a plurality of options including a sharing option. The first device displays a third interface including a target display region when detecting a second input for the sharing option. The sharing target display region includes two types of display regions, a first type is for displaying a device identifier that maintains an infrared connection, and a second type is for displaying a device identifier that maintains a Bluetooth connection. The first device sends the first object to the second device when detecting a third input for the device identifier in the first type display regions. This can implement quick locating, and facilitate an operation.

In an example embodiment, an optical communication system includes an implantable optical transmitter and an external optical receiver. The transmitter includes a housing having one or more drivers, plural light emitting sources, and an optical element arranged therein. Each driver converts a digital data signal into modulation signals to drive the sources. Each source generates a light beam in response to a corresponding modulation signal, each light beam contributing to form a single optical signal. The optical element directs the light beams to exit the housing such that a peak position of light intensity of each light beam is separated from a corresponding peak position of light intensity of an adjacent light beam by at least a first distance and less than a second distance. The optical receiver includes at least one photodiode that detects light generated by the sources and generates a reconstructed data signal.

In an example embodiment, an optical communication system includes an implantable optical transmitter and an external optical receiver. The transmitter includes a housing having one or more drivers, plural light emitting sources, and an optical element arranged therein. Each driver converts a digital data signal into modulation signals to drive the sources. Each source generates a light beam in response to a corresponding modulation signal, each light beam contributing to form a single optical signal. The optical element directs the light beams to exit the housing such that a peak position of light intensity of each light beam is separated from a corresponding peak position of light intensity of an adjacent light beam by at least a first distance and less than a second distance. The optical receiver includes at least one photodiode that detects light generated by the sources and generates a reconstructed data signal.

A station-side telescope included in a station-side optical antenna unit is configured to transmit and receive an optical signal, a guide light source is configured to emit guide light in a direction of orientation of the station-side telescope, a node-side telescope is configured to transmit and receive an optical signal, a node-side control unit included in a node-side optical antenna unit is configured to generate and output a control signal for moving a node-side base based on a position of the guide light included in an image obtained by a camera capturing the guide light emitted by the guide light source so that a direction of orientation of the node-side telescope faces the direction of orientation of the station-side telescope, an antenna drive unit is configured to receive the control signal and generate and output a drive signal based on the control signal, and the node-side base included in the node-side optical antenna unit is configured to support the node-side telescope and receive the drive signal to change a direction of orientation of the node-side telescope.

A station-side telescope included in a station-side optical antenna unit is configured to transmit and receive an optical signal, a guide light source is configured to emit guide light in a direction of orientation of the station-side telescope, a node-side telescope is configured to transmit and receive an optical signal, a node-side control unit included in a node-side optical antenna unit is configured to generate and output a control signal for moving a node-side base based on a position of the guide light included in an image obtained by a camera capturing the guide light emitted by the guide light source so that a direction of orientation of the node-side telescope faces the direction of orientation of the station-side telescope, an antenna drive unit is configured to receive the control signal and generate and output a drive signal based on the control signal, and the node-side base included in the node-side optical antenna unit is configured to support the node-side telescope and receive the drive signal to change a direction of orientation of the node-side telescope.

A detection and communication module arranged to implement a face detection function and an optical wireless communication function, and including a processing unit, a transmission chain and a reception chain, the processing unit being arranged to transmit via the transmission chain a detection signal, to receive via the reception chain the detection signal following its reflection on a face surface of an individual, and to evaluate a distance between the detection and communication module and the face surface of the individual, the processing unit being further arranged to transmit via the transmission chain a transmitted optical wireless communication signal containing data to be transmitted, and to receive via the reception chain a received optical wireless communication signal.

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 p.sub.th 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 p.sub.th 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.