| 摘要 |
An onboard communication apparatus that is installed in a vehicle and that performs communication with a roadside communication apparatus that provides various data and perform communication with other onboard communication apparatuses installed in other vehicles includes: a first communication unit that communicates by way of a channel whose the frequency band is fixed, a second communication unit that communicates by way of a channel that differs from the channel that is used in the first communication unit, and a determination unit that determines whether or not communication with the roadside communication apparatus is direct communication that is not relayed by another onboard communication apparatus, wherein, when direct communication with the roadside communication apparatus is not possible, the second communication unit communicates with the roadside communication apparatus by way of another onboard communication apparatus that is communicating with the roadside communication apparatus. |
