Method and radio beacon for localising an on-board unit
First Claim
1. A method for localising an on-board unit, which has a radio transceiver and an identifier, to a predefined area around a radio beacon, comprising the following steps:
- a) storing the identifier of the on-board unit and an associated radio property of the radio transceiver thereof in a database;
b) sending a first request with a first transmission power from the radio beacon;
c) receiving, in the radio beacon, a first response, which contains the identifier and a unique OBU identifier, from an on-board unit, and storing the OBU identifier in a presence list;
d) determining, from the database, the radio property of the transceiver of the on-board unit associated with the received identifier; and
e) localising the on-board unit in the predefined area by using the determined radio property;
wherein;
the steps b) to e) are repeated for at least one further run-through following a first run-through,for each run-through of the steps b) to e) concerning a respective OBU identifier, a localisation result is stored in the presence list for the respective OBU identifier, andthe localising of the on-board unit of the respective OBU identifier is verified when the number of positive localisation results stored for the respective OBU identifier exceeds a threshold value.
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Accused Products
Abstract
A method for localizing an on-board unit, which has a radio transceiver and an identifier, to a predefined area around a radio beacon, comprising the following steps: a) storing the identifier and an associated radio property in a database; b) sending a first request; c) receiving a first response from an on-board unit; d) determining, from the database, the radio property of the transceiver associated with the received identifier; and e) localizing the on-board unit in the predefined area; wherein: the steps b) to e) are repeated, for each run-through of the steps b) to e), a localization result is stored in a presence list, and the localizing is verified when the number of the positive localization results exceeds a threshold value.
5 Citations
12 Claims
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1. A method for localising an on-board unit, which has a radio transceiver and an identifier, to a predefined area around a radio beacon, comprising the following steps:
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a) storing the identifier of the on-board unit and an associated radio property of the radio transceiver thereof in a database; b) sending a first request with a first transmission power from the radio beacon; c) receiving, in the radio beacon, a first response, which contains the identifier and a unique OBU identifier, from an on-board unit, and storing the OBU identifier in a presence list; d) determining, from the database, the radio property of the transceiver of the on-board unit associated with the received identifier; and e) localising the on-board unit in the predefined area by using the determined radio property;
wherein;the steps b) to e) are repeated for at least one further run-through following a first run-through, for each run-through of the steps b) to e) concerning a respective OBU identifier, a localisation result is stored in the presence list for the respective OBU identifier, and the localising of the on-board unit of the respective OBU identifier is verified when the number of positive localisation results stored for the respective OBU identifier exceeds a threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A radio beacon for localising an on-board unit, which has a radio transceiver and an identifier, to a predefined area around the radio beacon, comprising:
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a memory; a radio transceiver; and a processor connected to the memory and to the radio transceiver; wherein the processor is configured a) to store the identifier of the on-board unit and an associated radio property of the radio transceiver in the memory, b) to send a first request with a first transmission power via the radio transceiver, c) to receive, from an on-board unit, a first response, which contains the identifier and a unique OBU identifier, via the radio transceiver, and to store the OBU identifier in the presence list, d) to determine, from the memory, the radio property of the transceiver of the on-board unit associated with the received identifier, and e) to localise the on-board unit in the predefined area by using the determined radio property, and wherein the processor is further configured to repeat the steps b) to e) for at least one further run-through following a first run-through, to store a localisation result in the presence list for a respective OBU identifier for each run-through of the steps b) to e) concerning the respective OBU identifier, and to verify the localising of the on-board unit of the respective OBU identifier when the number of positive localisation results stored for the respective OBU identifier exceeds a threshold value. - View Dependent Claims (10, 11, 12)
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Specification