Charging system, vehicle unit and charging method
A vehicle-mounted unit and toll collection technology, applied in the field of toll collection systems, vehicle-mounted units and toll collection, can solve problems such as traffic congestion, work tension, and expensive vehicle-mounted units
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[0035] Preferred embodiments of the present invention are described below with reference to the accompanying drawings.
[0036] Such as figure 1 As shown, an ETC system generally includes a roadside device 1 installed at a toll booth, an on-board unit 3 mounted on a vehicle for wireless communication with the roadside device 1, and a detachably installed on-board unit 3 IC card 5 for reading / writing information. The wireless communication speed between the roadside device 1 and the vehicle-mounted unit 3 is relatively high in order to exchange information stored in their internal buffer memories. On the contrary, there is a refresh memory inside the IC card 5, and the vehicle-mounted unit 3 writes or reads information into the refresh memory. Therefore, the speed at which information is written into the IC card 5 is especially lower than the communication speed between the roadside device 1 and the vehicle-mounted unit 3 .
[0037] Such as figure 2 As shown in , the roads...
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