| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a system which determines users of services at cross-purposes with one another and displays the result of cross-purposes determination while maintaining the anonymity of the users, and a method of how to do it. <P>SOLUTION: In a communication method between a plurality of portable terminal devices to be serviced and a server device, the date/time and coordinates of the plurality of portable terminal devices are monitored and saved, where, with a first date/time and first coordinates related to a first portable terminal device from which a service is requested being referenced, if a second terminal device exists in a first time zone including the first date/time and in a first area including the first coordinates which respectively are formed based thereupon, the second terminal device is identified to be at cross-purposes; and, with a second date/time and second coordinates related to the first portable terminal device being referenced, if no terminal at cross-purposes exists in a second time zone including the second date/time and in a second area including the second coordinates which respectively are formed based thereupon, transmission to the first portable terminal device of a first message concerning a terminal at cross-purposes with it is allowed. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
