| 摘要 |
<P>PROBLEM TO BE SOLVED: To complete communication of information for receipt of a charge securely while removing the repetition of waste communication operation in an ETC on-vehicle device. <P>SOLUTION: This ETC on-vehicle device is provided with a CPU part for reading FID for distinguishing an antenna on a road side, a memory part for storing FID, and a time counting means for starting counting of time when the operation for communicating the information of receipt of the charge to regard FID effective during a predetermined time is completed and ending counting of time after the predetermined time. The ETC on-vehicle device controls in such a way that FID received through a first antenna on a road side is made effective during the predetermined time by time counting operation of the time counting means and the operation for receiving a new FCMC signal continues until an FCMC signal including FID different from the FID is received during counting of time of the time counting means. <P>COPYRIGHT: (C)2003,JPO |
