An objective is to provide a communication system, a terminal, a communication method, and a program capable of improving the probability of successful authentication regardless of mobility of the terminal.

The communication system according to the present invention includes a terminal 30 including: a sensor unit 36 that senses a state of the terminal and includes at least one of an acceleration sensor, a gyro sensor, a position sensor, and a proximity sensor; an optical receiver 31 that receives an optical modulation signal and outputs an electrical signal; a correction circuit 34 that corrects the electrical signal on a basis of the state of the terminal sensed by the sensor unit 36 when one of the following is true: illuminance of light received from an optical transmitter 21 by the optical receiver 31 is equal to or lower than an illuminance threshold value; and a signal intensity of the electrical signal output by the optical receiver 31 is equal to or lower than an intensity threshold value; an authentication information checking circuit 32 that checks the authentication information contained in the electrical signal; and a terminal-side RF transmitter/receiver 33 that transmits the authentication information to a base station 20 via RF wireless communication.

A communication device (10-1) according to the present disclosure includes a ToF (time of flight) sensor and a control unit (90). The ToF sensor includes a light emitting unit (31) that emits light to an object (X) to be measured and a light receiving unit (32) that receives light reflected from the object (X) to be measured. The control unit (90) controls the ToF sensor. Furthermore, the control unit (90) emits light for a linking request to another communication device (10-2), from the light emitting unit (31), and receives light being a response to the linking request from the another communication device (10-2), at the light receiving unit (32).

A communication device (10-1) according to the present disclosure includes a ToF (time of flight) sensor and a control unit (90). The ToF sensor includes a light emitting unit (31) that emits light to an object (X) to be measured and a light receiving unit (32) that receives light reflected from the object (X) to be measured. The control unit (90) controls the ToF sensor. Furthermore, the control unit (90) emits light for a linking request to another communication device (10-2), from the light emitting unit (31), and receives light being a response to the linking request from the another communication device (10-2), at the light receiving unit (32).

Systems, methods, and devices for infrared (IR) communications in accordance with embodiments of the invention are disclosed. In one embodiment, a first infrared (IR) device configured for real time mapping comprises: a mapping module; a communication module; an IR receiver configured to receive an IR signal transmitted from at least one second IR device; a processor operatively connected to the mapping module, communication module, and IR receiver; and memory storing a program comprising instructions that cause the first IR device to: capture map data using the mapping module; transmit a request for an IR signal using the communication module; scan for IR signals using the IR receiver; receive an IR signal, from the at least one second IR device, using the IR receiver; and validate the at least one second IR device to a location by mapping the received IR signal to a position on the map data.

Provided is a device, which is a transmission device that can improve performance, that includes: a light source; and a transmitter that generates a modulated signal based on an input signal and transmits the modulated signal from the light source as visible light by changing a luminance of the light source in accordance with the modulated signal. The transmitter includes, in the modulated signal, a plurality of items of information related to service set identifiers (SSIDs) of a plurality of mutually different access points in a wireless local area network (LAN), and transmits the modulated signal from the light source.

Embodiments of the present invention are directed to systems, devices, and methods for displaying and securing articles of merchandise. In one example, a merchandise security system includes a plurality of security devices. Each of the security devices is configured to be attached to an article of merchandise and includes an illumination source for generating a light signal. The system also includes at least one computing device configured to communicate with the illumination sources in order to obtain data from the security devices and/or the articles of merchandise. Each of the security devices is configured to configured to generate a security signal in response to removal of the article of merchandise from the security device.

Embodiments of the present invention are directed to systems, devices, and methods for displaying and securing articles of merchandise. In one example, a merchandise security system includes a plurality of security devices. Each of the security devices is configured to be attached to an article of merchandise and includes an illumination source for generating a light signal. The system also includes at least one computing device configured to communicate with the illumination sources in order to obtain data from the security devices and/or the articles of merchandise. Each of the security devices is configured to configured to generate a security signal in response to removal of the article of merchandise from the security device.

A device having at least one communication unit arranged in a wall of the aircraft and at least one communication unit arranged in a seat of the aircraft, which are able to cooperate with one another in order to communicate data by means of visible light. The device also includes at least one inductive transmitter arranged in the wall and at least one inductive receiver arranged in the seat, which are able to cooperate with one another in order to transmit electric power by induction. Also a system with such a device and an aircraft with such a device or such a system.

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.