| 摘要 |
Electronic tickets passing through a passage area and arriving in a detection area receive a first information unit including the identity of the detection area, whereby a second transmitter/receiver module located on the ticket is activated. At the beginning of the provision of a service, for instance, after the departure of a train, the tickets receive a second information unit that likewise includes the identity of the detection area, wherein at least the identity of the detection area is then stored as presence information if it matches the identity contained in the first information unit. If necessary, this method step is repeated. When the tickets leave the detection area through the passage area, they receive once again a first information unit and transmit a third information unit containing the stored presence information along with the identity of the ticket to a second transmitter/receiver unit, which registers the presence of the corresponding ticket.
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