Beacon for a road toll system

G - Physics – 07 – B

Patent

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Details

G07B 15/06 (2011.01) H04B 1/38 (2006.01)

Patent

CA 2737837

Beacon (4) with a transceiver (5) for radio communication with vehicle OBUs (3) of a road toll system, wherein the transceiver (5) has a directional antenna (7) and is configured to communicate wirelessly with OBUs (3) on a selected channel directed via the directional antenna (7), wherein the transceiver (5) is additionally equipped with an omnidirectional antenna (12) and is configured to transmit, before the beginning of a directional radio communication (8), by means of the omnidirectional antenna (12) a channel reservation message (RTS) and/or to check, before the beginning of a directional radio communication (8), by means of the omnidirectional antenna (12) whether the selected channel is free (LBT).

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