Patent ID: 8674846
Filing Date: 2014-03-18
Classification: G07B

Abstract:
1. A method for radio communication between a radio beacon and an onboard unit with a transceiver as part of a road toll system, wherein the radio beacon has a limited radio coverage area and the onboard unit has two operating modes, a first energy-consuming working mode, and a second energy-saving resting mode, which can be changed from the resting mode to the working mode by a signal received from the radio beacon, the method comprising: receiving a signal by the onboard unit and changing the operating mode of the onboard unit to the working mode within a prompt time, if the onboard unit was previously in the resting mode; transmitting a response signal containing at least one information message concerning the operating mode of the onboard unit before receipt of the signal, from the onboard unit to the radio beacon; receiving the response signal by the radio beacon; selecting by the radio beacon whether a remaining part of the radio communication is to be performed with the onboard unit for a longer or shorter duration on the basis of the received operating mode information; and conducting the remaining part of the radio communication for the selected longer or shorter duration.