| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication system which enhances the confidentiality of information transmission and improves the reliability of the information transmission. SOLUTION: When a preceding vehicle 11 enters in a communicable region 13 of an antenna 29a, a mobile station equipped in the preceding vehicle 11 recognizes that the vehicle enters the communicable region 13, and transmits message information and destination electronic number information to the antenna 29a. After the preceding vehicle 11 goes out of the communicable region 13 (the vehicle is not always necessary to go out of the region), a mobile station equipped in a subsequent vehicle 15 (transmission destination of the message information) recognizes that the vehicle enters the communicable region 13, transmits electronic number information of the vehicle to the antenna 29a, receives message information corresponding to the electronic number information of the vehicle from the antenna 29a, and displays the message on a display part of the mobile station equipped in the subsequent vehicle 15. COPYRIGHT: (C)2005,JPO&NCIPI
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