| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To supervise radio waves transmitted from a plurality of radio base stations installed in a station yard, announce car change guide information before arrival to the car change station, and make users effectively perform the car change. <P>SOLUTION: The radio portable terminal comprises a route information acquisition means (a route information acquisition unit 54) which acquires route information including a car change station based on target station information which is set and input by the user; and a control means (a main control unit 60) which discriminates base station discrimination information and its signal intensity information from a signal transmitted from a radio base station 1 which is installed in the station yard before one or more stations of the car change station, calculates a distance from the car in which the user is and a radio base station installed in the car change station, and reports. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
