Information processing system, information processing device and information processing method

An information processing device comprising:

• a processor, wherein the processor executes:
• transmitting a request to transmit information to unspecified and many communication devices that are located within a given area;
• receiving a response to the request to transmit information from the communication device that is located within the given area;
• and
• adjusting, when the number of responses that are received by the receiver is larger than a maximum allowable number, an area to which the request to transmit information is transmitted such that the number of responses is equal to or smaller than the maximum allowable number and adjusting, when the number of responses is equal to or smaller than the maximum allowable number, an area to which the request to transmit information is transmitted, which is an area different from the area to which the request has been transmitted.

A prioritizing method executed by a computer, the method comprising:

• transmitting a request to transmit information to unspecified and many communication devices that are located within a given area using a processor;
• receiving a response to the request to transmit information from the communication device that is located within the given area using the processor;
• and
• when the number of responses that are received is larger than a maximum allowable number, adjusting an area to which the request to transmit information is transmitted such that the number of responses is equal to or smaller than the maximum allowable number and, when the number of responses is equal to or smaller than the maximum allowable number, adjusting an area to which the request to transmit information is transmitted, which is an area different from the area to which the request has been transmitted using the processor.