Wireless communication device, wireless communication system, wireless communication method, and recording medium

A wireless communication system comprising:

• a wireless communication device and a terminal device configured to wirelessly communicate with each other, the wireless communication device comprising a first processor and a first function control circuit configured to execute a first function, and the terminal device comprising a second processor,
• wherein:
• the first processor of the wireless communication device is configured to:
• establish the wireless connection with the terminal device upon request for the wireless connection from one of the wireless communication device and the terminal device,
• query, upon establishment of the wireless connection with the terminal device, the terminal device with which the wireless connection is established to check whether a first application program for causing the wireless communication device to execute the first function is in a state of being executed or run by the terminal device,
• maintain or cut off the wireless connection with the terminal device based on a response from the terminal device to the query,
• after a predetermined period has elapsed since a time at which the wireless connection with the terminal device is maintained based on the response from the terminal device to the query, re-query the terminal device with which the wireless connection is maintained, and cut off or continue to maintain the maintained wireless connection based on a response from the terminal device to the re-query, and
• identify, as a connection-prohibited terminal device, a terminal device not responding to at least a predetermined number of queries, cut off the wireless connection with the connection-prohibited terminal device, and prohibit the connection-prohibited terminal device from reconnecting to the wireless communication device within a connection prohibition period, the connection prohibition period being updated in accordance with a number of times that the wireless connection has been cut off, and
• the second processor of the terminal device is configured to respond to the query from the wireless communication device.

A wireless communication method executed by a wireless communication device for communication with a terminal device, the method comprising:

• establishing a wireless connection with the terminal device upon request for the wireless connection from one of the wireless communication device and the terminal device;
• querying, upon establishment of the wireless connection with the terminal device, the terminal device with which the wireless connection is established to check whether a first application program for causing the wireless communication device to execute a first function is in a state of being executed or run by the terminal device;
• maintaining or cutting off the wireless connection with the terminal device based on a response from the terminal device to the query;
• after a predetermined period has elapsed since a time at which the wireless connection with the terminal device is maintained based on the response from the terminal device to the query, re-querying the terminal device with which the wireless connection is maintained, and cutting off or continuing to maintain the maintained wireless connection based on a response from the terminal device to the re-query;
• and
• identifying, as a connection-prohibited terminal device, a terminal device not responding to at least a predetermined number of queries, cutting off the wireless connection with the connection-prohibited terminal device, and prohibiting the connection-prohibited terminal device from reconnecting to the wireless communication device within a connection prohibition period, the connection prohibition period being updated in accordance with a number of times that the wireless connection has been cut off.

A non-transitory computer-readable recording medium having stored thereon a program for causing a computer included in a wireless communication device to execute processing comprising:

• establishing a wireless connection with a terminal device upon request for the wireless connection from one of the wireless communication device and the terminal device;
• querying, upon establishment of the wireless connection with the terminal device, the terminal device with which the wireless connection is established to check whether a first application program for causing the wireless communication device to execute a first function is in a state of being executed or run by the terminal device;
• maintaining or cutting off the wireless connection with the terminal device based on a response from the terminal device to the query,
• after a predetermined period has elapsed since a time at which the wireless connection with the terminal device is maintained based on the response from the terminal device to the query, re-querying the terminal device with which the wireless connection is maintained, and cutting off or continuing to maintain the maintained wireless connection based on a response from the terminal device to the re-query, and
• identifying, as a connection-prohibited terminal device, a terminal device not responding to at least a predetermined number of queries, cutting off the wireless connection with the connection-prohibited terminal device, and prohibiting the connection-prohibited terminal device from reconnecting to the wireless communication device within a connection prohibition period, the connection prohibition period being updated in accordance with a number of times that the wireless connection has been cut off.