Road-vehicle communication system and vehicle-mounted device

A road-vehicle communication system comprising:

• a vehicle-mounted device mounted on a traveling vehicle;
• and
• a plurality of roadside apparatuses that perform short-range communication with the vehicle-mounted device and transmit content information to the vehicle-mounted device, wherein
• identification information for identifying each of the plurality of roadside apparatuses is given to the plurality of roadside apparatuses,
• the roadside apparatus transmits the identification information concerning the roadside apparatus as first identification information and transmits, as second identification information, identification information concerning a roadside apparatus via which the vehicle is expected to travel to reach a destination if the vehicle is traveling in a traveling direction a traffic lane where the roadside apparatus is installed, and
• the vehicle-mounted device stores the first identification information transmitted from the roadside apparatus and, if the stored first identification information is included in the second identification information transmitted from the roadside apparatus next time, reproduces content information transmitted together with the second identification information and deletes the second identification information transmitted from the roadside apparatus after reproducing the content information.

A vehicle-mounted device comprising:

• a communication unit configured to be able to perform wireless communication with a plurality of roadside apparatuses to which identification information for identifying each of the plurality of roadside apparatuses is given, receives the identification information concerning the roadside apparatus, which is transmitted from the roadside apparatus, as first identification information, and receives, as second identification information, identification information concerning a roadside apparatus via which the vehicle is expected to travel to reach a destination if the vehicle is traveling in a traveling direction a traffic lane where the roadside apparatus is installed;
• a storage unit configured to store the first identification information transmitted from the roadside apparatus;
• a reproducing unit configured to reproduce content information provided from the roadside apparatus;
• and
• a control unit configured to cause, if the first identification information stored in the storage unit is included in the second identification transmitted from the roadside apparatus, the reproducing unit to reproduce content information transmitted together with the second identification information and deletes the second identification information transmitted from the roadside apparatus after reproducing the content information.