Patent ID: 8849311

Claim:
A server device comprising: a receiving unit configured to receive, from each of a plurality of information-processing devices, location information showing a respective location of each information-processing device; a setting unit configured to set a condition including at least one of a spatial range or a temporal range for determining whether one information-processing device is close to another information-processing device, the condition being dynamically determined in response to a parameter including a spatial density of information-processing devices in a geographic area; a determining unit configured to determine whether a first information-processing device and a second information-processing device from among the plurality of information-processing devices satisfy the condition based on the location information received by the receiving unit; and a transmitting unit configured to transmit predetermined information to the first information-processing device and the second information-processing device, in a case that the determining unit determines that the first information-processing device and the second information-processing device satisfy the condition.