A system to communicate via modulated optical signals of the Li-Fi signal type to transmit data to and from a plurality of defined privileged spaces. The communicating system includes a plurality of first light sources, each first light source emitting, in the infrared, a first modulated optical signal. A plurality of optical fibers, each optical fiber guiding the first modulated optical signal from a single first light source in the direction of an optical interface. The optical interface transmitting the first modulated optical signal into a defined privileged space. Each optical fiber also transporting a second modulated optical signal from the associated defined privileged space in the direction of a device configured to acquire the second modulated optical signal.

According to one embodiment, a repair terminal includes reception means for receiving a setting value of a predetermined setting item set in an information processing device by visible light communication using light emitted by a light source device connected to the information processing device; matching means for matching a setting value of the setting item received by the reception means with a matching setting value corresponding to the setting item and determining appropriateness of the setting value; and output means for outputting a matching result of the matching means.

According to one embodiment, a repair terminal includes reception means for receiving a setting value of a predetermined setting item set in an information processing device by visible light communication using light emitted by a light source device connected to the information processing device; matching means for matching a setting value of the setting item received by the reception means with a matching setting value corresponding to the setting item and determining appropriateness of the setting value; and output means for outputting a matching result of the matching means.

A display device includes imaging unit (101) to generate a captured image, image recognizer (102) to recognize whether or not the captured image contains a reception terminal, light emitter (106) to emit light in accordance with a modulation signal, and transmission controller (103) and light emission controller (105) to control driving of light emitter (106) based on a result recognized by image recognizer (102).

An approach is disclosed that optically transmit data from a dedicated mobile device (DMD) to another device. Optically transmitting the data is performed by displaying the data on a display screen included in the DMD. The approach further optically receives data at the DMD. The data is received at a digital camera included in the DMD. Based on the exchanged data, the DMD determines if the DMD and the other device are bound to each other.

Mobile devices with ultrasound ranging are disclosed. A mobile device with ultrasound ranging can include a multifunctional component capable of performing multiple functions in the device, where the component can function as an ultrasound transmitter capable of transmitting an ultrasound signal to a proximate device. In some examples, the component can also function as a power button capable of powering the device up and down. In some examples, the component can also function as a home button capable of causing a home page to display on the device. The mobile device can further include an ultrasound receiver capable of receiving an ultrasound signal from the proximate device, where the device can calculate a range of the proximate device based on a time lapse associated with the received ultrasound signal.

Mobile devices with ultrasound ranging are disclosed. A mobile device with ultrasound ranging can include a multifunctional component capable of performing multiple functions in the device, where the component can function as an ultrasound transmitter capable of transmitting an ultrasound signal to a proximate device. In some examples, the component can also function as a power button capable of powering the device up and down. In some examples, the component can also function as a home button capable of causing a home page to display on the device. The mobile device can further include an ultrasound receiver capable of receiving an ultrasound signal from the proximate device, where the device can calculate a range of the proximate device based on a time lapse associated with the received ultrasound signal.

A method for communicating with a given device that is located at a given direction, the method may include transmitting a triggering signal, by a communication device and over a directional communication link; receiving, by the communication device, one or more responses to the triggering signal, wherein the one or more responses originate from one or more devices; participating in determining of whether the one or more devices comprises the given device or receiving indication about whether the one or more devices comprises the given device; and when the one or more devices comprises the given device then attempting, by the communication device, to establish communication with the given device.

A method for communicating with a given device that is located at a given direction, the method may include transmitting a triggering signal, by a communication device and over a directional communication link; receiving, by the communication device, one or more responses to the triggering signal, wherein the one or more responses originate from one or more devices; participating in determining of whether the one or more devices comprises the given device or receiving indication about whether the one or more devices comprises the given device; and when the one or more devices comprises the given device then attempting, by the communication device, to establish communication with the given device.

Arrangements for transmitting network credentials from a user device to a second device to enable the second device to connect to a network are disclosed. At the user device, a user inputs network credentials for the second device to enable the second device to connect to a network. The user device transmits modulated light to the second device. The light is modulated so that the transmitted light is encoded with the network credentials. The second device has a photo sensor for receiving the modulated light from the user device and a processor for processing the modulated light to obtain the network credentials from the received modulated light.