To reduce a possibility that a communication is performed with an on-vehicle device that is not a communication subject, in an electronic toll collection system.SOLUTION: A calculation unit 142 of a road-side wireless device 10 in an electronic toll collection system calculates an arrival angle of a radio wave received from an on-vehicle device. A discrimination unit 143 discriminates whether the arrival angle calculated by the calculation unit 142 is an angle indicating the inside of a communication area. In a case where it is discriminated by the discrimination unit 143 that the arrival angle is an angle indicating the inside of the communication area, a communication unit 12 communicates with the on-vehicle device.SELECTED DRAWING: Figure 1
【課題】電子料金収受システムにおいて、通信対象ではない車載器と通信が行われる可能性を低くする。【解決手段】電子料金収受システムにおける路側無線装置10の計算部142は、車載器から受信した電波の到来角を計算する。判定部143は、計算部142によって計算された到来角が通信領域内を示す角度であるか否かを判定する。通信部12は、判定部143によって到来角が通信領域内を示す角度であると判定された場合に、車載器との通信を行う。【選択図】図1
ROAD-SIDE WIRELESS DEVICE AND COMMUNICATION METHOD FOR ROAD-SIDE WIRELESS DEVICE
路側無線装置及び路側無線装置の通信方法
2019-10-24
Patent
Electronic Resource
Japanese
WIRELESS ROAD-SIDE MACHINE, TRAFFIC COMMUNICATION SYSTEM, AND TRAFFIC COMMUNICATION METHOD
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