Communication device, electronic timepiece, time correcting method and recording medium

A time correcting method performed by a device capable of wireless communication and having a time counting function comprising:

• setting a communication mode of the device to a notification mode in which the device sends a first notification signal for informing of its existence which includes time interval information indicating a time interval from when another device stops detection to when a communication mode of the other device is to be changed from a detection mode to a notification mode;
• changing the communication mode of the device from the notification mode to a detection mode in which the device detects a second notification signal sent from the other device;
• receiving the detected second notification signal;
• and
• in the case that the received second notification signal includes time information, correcting time of the device based on the time information.

A non-transitory computer-readable recording medium for recording a computer program controlling a device capable of wireless communication and having a time counting function, the program causing the device to perform steps of:

• setting a communication mode of the device to a notification mode in which the device sends a first notification signal for informing of its existence which includes time interval information indicating a time interval from when another device stops detection to when a communication mode of the other device is to be changed from a detection mode to a notification mode;
• changing the communication mode of the device from the notification mode to a detection mode in which the device detects a second notification signal sent from the other device;
• receiving the detected second notification signal;
• and
• in the case that the received second notification signal includes time information, correcting time of the device based on the time information.

A device capable of wireless communication comprising:

• 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 another device,
• wherein, in the case that the second notification signal is detected in the detection mode and includes time interval information indicating a time interval from when the device stops detection to when the communication mode of the device is to be changed from the detection mode to the notification mode, the processor changes the communication mode from the detection mode to the notification mode according to the time interval information included in the second notification signal and generates the first notification signal including data indicating the current time acquired from the counter.

A time correcting method performed by a device capable of wireless communication and having a time counting function comprising:

• setting a communication mode of the device to a detection mode in which the device detects a second notification signal from another device;
• receiving the detected second notification signal;
• changing the communication mode of the device from the detection mode to a notification mode in which the device sends a first notification signal for informing of its existence according to time interval information included in the second notification signal which indicates a time interval from when the device stops detection to when the communication mode of the device is to be changed from the detection mode to the notification mode;
• acquiring data indicating current time;
• and
• generating the first notification signal in which the acquired data indicating the current time is included.

A non-transitory computer-readable recording medium for recording a computer program controlling a device capable of wireless communication and having a time counting function, the program causing the device to perform steps of:

• setting a communication mode of the device to a detection mode in which the device detects a second notification signal from another device;
• receiving the detected second notification signal;
• changing the communication mode of the device from the detection mode to a notification mode in which the device sends a first notification signal for informing of its existence according to time interval information included in the second notification signal which indicates a time interval from when the device stops detection to when the communication mode of the device is to be changed from the detection mode to the notification mode;
• acquiring data indicating current time;
• and
• generating the first notification signal in which the acquired data indicating the current time is included.