Patent ID: 7783516

Claim:
A method for calculation of a fare for the use of a transport means, the method comprising the steps of: providing a transmitter in the transport means; providing a receiver in a user terminal of a user, the user terminal including a memory; charging the memory with a credit in a first currency that is valid in a first currency zone, wherein the credit serves for automatic deduction of the fare in case of a use of the transport means by the user; emitting data telegrams from the transmitter, the data telegrams containing currency information; receiving the data telegrams with said receiver of said user terminal; determining if the user terminal is in the first currency zone or a second currency zone based on the emitted data telegrams; determining automatically a conversion factor contained in the currency information for converting the first currency into a second currency that is valid in the second currency zone when the user terminal is in use in the second currency zone; calculating automatically the fare in the first currency, if the user terminal is in use in the first currency zone, or, if the user terminal is in use in the second currency zone, calculating automatically the fare in the second currency and converting it into the first currency by use of the conversion factor; and deducting the fare in the first currency from the credit stored in the first currency so as to maintain the stored credit in the first currency and not entirely converting it into the second currency.