路側機、車載器、車載器通信システム、車載器通信方法、及びコンピュータプログラム

摘要

To provide a roadside device, an on-vehicle device, an on-vehicle device communication system, an on-vehicle device communication method, and a computer program capable of preventing erroneous communication while minimizing the number of antennas.SOLUTION: A roadside device includes an antenna, a wireless communication part, and a control part. The antenna forms a wireless communication area by emitting radio waves. The wireless communication part transmits, via the antenna, a request signal for requesting identification information for identifying an on-vehicle device to the on-vehicle device mounted on vehicle entering the wireless communication area, and receives the identification information from the on-vehicle device via the antenna. The control part determines the on-vehicle device that has transmitted the identification information as a target of information communication process, and executes the information communication process related to the on-vehicle device determined as the target, in the case where the same identification information is received multiple times by the wireless communication part.SELECTED DRAWING: Figure 1