According to an aspect of the present invention, a device capable of wireless communication includes a counter for counting current time, and a processor for setting a communication mode of the device to one of a notification mode in which the device sends a first notification signal for informing of its existence and a detection mode in which the device detects a second notification signal sent from other device. In the case that the processor changes the communication mode of the device from the notification mode to the detection mode and the second notification signal received in the detection mode includes first time information, the processor corrects time of the counter based on the first time information.

According to an aspect of the present invention, a device capable of wireless communication includes a counter for counting current time, and a processor for setting a communication mode of the device to one of a notification mode in which the device sends a first notification signal for informing of its existence and a detection mode in which the device detects a second notification signal sent from other device. In the case that the processor changes the communication mode of the device from the notification mode to the detection mode and the second notification signal received in the detection mode includes first time information, the processor corrects time of the counter based on the first time information.

The present invention relates to a method for setting a quartz watch, the watch comprising an optical sensor and a microcontroller configured to receive electrical signals generated by the optical sensor, the method being performed by way of a portable electronic appliance comprising a point light source and a microcontroller configured to control said point light source, the method comprising the following steps: placing the optical sensor of the watch facing the point light source of the electronic appliance on the order of the microcontroller of the electronic appliance, flashing the point light source of the electronic appliance so as to form a sequence of light pulses corresponding to a coding of setting parameters, the sequence then being received by the optical sensor of the watch decoding the received light sequence, by way of the microcontroller of the watch, in order to recover the setting parameters on the order of the microcontroller of the watch, setting the watch according to the setting parameters.

A system and method for synchronizing a vehicular with a secondary device is provided herein. The systems and methods disclosed herein include receiving current time information, receiving new information from the secondary device, and comparing the information to perform an automatic update of the vehicular clock. Also disclosed herein is a clock electronic system for integration into a vehicle.

A communication apparatus comprises a communicator that receives a standard time from an external apparatus, a manipulation receiver that receives a time correction action from a user, and a controller that performs a timing processing for clocking time and a time correction processing for correcting the time clocked by the timing processing, on the basis of the standard time received by the communicator, or on the basis of the time correction action received by the manipulation receiver. The controller changes processing contents of the time correction processing until a prescribed time interval has elapsed, when the time clocked by the timing processing is corrected on the basis of the time correction action received by the manipulation receiver.

A communication system (1) comprises a central (100) and a peripheral (200). The central (100) receives location information and time information from NTP servers (10) and a location server (30). The central (100) creates first offset information of the time measured by its own device and the time information received from the NTP servers (10). The central (100) acquires from map information a time difference corresponding to a location presented by the location information received from the location server (30). The central (100) creates first updated time information based on the time measured by its own device, first offset information, and time difference corresponding to the location presented by the location information received from location server (30) and transmits the first updated time information to the peripheral (200). The peripheral (200) changes the time displayed by its own device based on the received first updated time information.

A communication system (1) comprises a central (100) and a peripheral (200). The central (100) receives location information and time information from NTP servers (10) and a location server (30). The central (100) creates first offset information of the time measured by its own device and the time information received from the NTP servers (10). The central (100) acquires from map information a time difference corresponding to a location presented by the location information received from the location server (30). The central (100) creates first updated time information based on the time measured by its own device, first offset information, and time difference corresponding to the location presented by the location information received from location server (30) and transmits the first updated time information to the peripheral (200). The peripheral (200) changes the time displayed by its own device based on the received first updated time information.

An electronic timepiece includes indicators, an operation receiving unit, a timing unit and a processor. The operation receiving unit receives an operation performed by a user. The timing unit counts a date and time at present. The processor carries out operation control of the indicators and obtains a local time setting based on a time difference between a predetermined standard time and a local time at a target position. The processor makes at least apart of the indicators display the local time in accordance with the operation received by the operation receiving unit and obtains the local time setting based on a difference between the displayed local time and the date and time counted by the timing unit.

An electronic timepiece includes indicators, an operation receiving unit, a timing unit and a processor. The operation receiving unit receives an operation performed by a user. The timing unit counts a date and time at present. The processor carries out operation control of the indicators and obtains a local time setting based on a time difference between a predetermined standard time and a local time at a target position. The processor makes at least apart of the indicators display the local time in accordance with the operation received by the operation receiving unit and obtains the local time setting based on a difference between the displayed local time and the date and time counted by the timing unit.

The present disclosure describes methods and apparatuses for fine timing measurement with frequency domain processing. In some aspects, a first device receives a frame that is transmitted by a second device via a wireless medium. A degree to which the frame is affected by multipath propagation in the wireless medium is determined based on frequency power and linear phase of the frame, which can be calculated using frequency domain processing. Based on the degree to which the frame is affected, a time of arrival calculation for the frame can be compensated for effects related to the multipath propagation. By so doing, the effects of multipath propagation can be addressed without time domain processing, which is typically complex and more expensive to implement.