Patent ID: 11910282
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Measurement (Instruments)
Classification: CPC H  G | IPC G  H

Claim 4:
5. A road-to-vehicle communication method for a roadside communication device connected to a first antenna used for communications with an on-board unit, and a second antenna used for estimating an angle of arrival of a radio wave, the road-to-vehicle communication method comprising:
detecting a receive strength of a radio wave received via the first antenna from a first on-board unit;
estimating an angle of arrival and a receive strength of a direct wave and an angle of arrival and a receive strength of a reflected wave, the direct wave and the reflected wave being included in one or more radio waves received via the second antenna from one or more on-board units;
determining whether or not to enable communications with the first on-board unit, using the first antenna, on a basis of the detected receive strength, and the estimated angles of arrival and the estimated receive strengths of the direct and reflected waves of the one or more radio waves;
determining that communications with the first on-board unit are enabled, if the detected receive strength exceeds a reference value, and if the estimated angle of arrival of either the direct wave or reflected wave of the radio wave shows an arrival from a communication area; and
communicating with the first on-board unit via the first antenna in accordance with the determined result.