| 摘要 |
<p>When collision with a second terminal (20) has been detected, a first terminal (10) causes physical quantity information supplied from the second terminal (20) and indicating a predetermined physical quantity to be contained in first collision information and transmits the first collision information to a server (30). Meanwhile, when collision with the first terminal (10) has been detected, the second terminal (20) supplies a predetermined physical quantity to the first terminal (10), causes physical quantity information indicating the supplied predetermined physical quantity to be contained in second collision information, and transmits the second collision information to the server (30). The server (30) identifies the first terminal (10) and the second terminal (20) as a pair of terminals which collide with each other depending on whether or not the physical quantity information contained in the first collision information and the physical quantity information contained in the second collision information coincide with each other.</p> |
