VEHICLE IDENTIFICATION SYSTEM AND METHOD
First Claim
1. A vehicle identification system comprising a central station, a roadside reader for wirelessly communicating with radio tags carried by vehicles, a mapping unit connected to the reader, and a correlation unit connected to the mapping unit;
- the reader being part or member of a lane controller which has an interface connected to an input of the central station via a connection;
the reader having a first output which is connected to the interface and a second output which is connected to the mapping unit; and
the mapping unit having an output which is also connected to the interface;
wherein a first tag is configured to wirelessly transmit messages according to a first protocol to the reader, each message comprising a unique first-protocol identification of the tag;
wherein a second tag is configured to wirelessly transmit messages according to a second protocol to the reader, each message comprising a unique second-protocol identification of the tag;
wherein the correlation unit is configured to correlate second-protocol tag identifications to first-protocol tag identifications from a reserved subset of first-protocol tag identifications that are not used for tags deployed in vehicles;
wherein the reader is configured to forward first-protocol messages to the central station and to detect second-protocol messages and forward the detected second-protocol messages to the mapping unit;
wherein the mapping unit is configured to generate a new first-protocol message and forward this message to the central station upon receiving a second-protocol message from the reader byextracting the second-protocol tag identification from the second-protocol message,retrieving that first-protocol tag identification that correlates to the extracted second-protocol tag identification from the correlation unit,generating said new first-protocol message by copying information from said second-protocol message according to a predetermined mapping between the second protocol and the first protocol while replacing the second-protocol tag identification by the retrieved first-protocol tag identification, andforwarding the generated new first-protocol message to the central station; and
wherein the central station is configured to receive and store first-protocol messages from the reader as well as new first-protocol messages from the mapping unit and to identify a vehicle by means of the first-protocol tag identification therein.
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Abstract
The disclosed subject matter relates to a vehicle identification system comprising a central station, a roadside reader for wirelessly communicating with radio tags carried by vehicles, a mapping unit connected to the reader, and a correlation unit connected to the mapping unit, wherein the correlation unit is configured to correlate second-protocol tag identifications to first-protocol tag identifications from a reserved subset of first-protocol tag identifications, wherein the mapping unit is configured to generate a new first-protocol message upon receiving a second-protocol message from the reader, and wherein the central station is configured to receive and store first-protocol messages from the reader as well as new first-protocol messages from the mapping unit and to identify a vehicle. The disclosed subject matter further relates to a method for identifying vehicles by means of this system.
0 Citations
14 Claims
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1. A vehicle identification system comprising a central station, a roadside reader for wirelessly communicating with radio tags carried by vehicles, a mapping unit connected to the reader, and a correlation unit connected to the mapping unit;
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the reader being part or member of a lane controller which has an interface connected to an input of the central station via a connection; the reader having a first output which is connected to the interface and a second output which is connected to the mapping unit; and the mapping unit having an output which is also connected to the interface; wherein a first tag is configured to wirelessly transmit messages according to a first protocol to the reader, each message comprising a unique first-protocol identification of the tag; wherein a second tag is configured to wirelessly transmit messages according to a second protocol to the reader, each message comprising a unique second-protocol identification of the tag; wherein the correlation unit is configured to correlate second-protocol tag identifications to first-protocol tag identifications from a reserved subset of first-protocol tag identifications that are not used for tags deployed in vehicles; wherein the reader is configured to forward first-protocol messages to the central station and to detect second-protocol messages and forward the detected second-protocol messages to the mapping unit; wherein the mapping unit is configured to generate a new first-protocol message and forward this message to the central station upon receiving a second-protocol message from the reader by extracting the second-protocol tag identification from the second-protocol message, retrieving that first-protocol tag identification that correlates to the extracted second-protocol tag identification from the correlation unit, generating said new first-protocol message by copying information from said second-protocol message according to a predetermined mapping between the second protocol and the first protocol while replacing the second-protocol tag identification by the retrieved first-protocol tag identification, and forwarding the generated new first-protocol message to the central station; and wherein the central station is configured to receive and store first-protocol messages from the reader as well as new first-protocol messages from the mapping unit and to identify a vehicle by means of the first-protocol tag identification therein. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for identifying a vehicle in a system comprising a central station, a roadside reader for wirelessly communicating with radio tags carried by vehicles, a mapping unit connected to the reader, and a correlation unit connected to the mapping unit, the reader being part or member of a lane controller which has an interface connected to an input of the central station via a connection, the reader having a first output which is connected to the interface and a second output which is connected to the mapping unit, and the mapping unit having an output which is also connected to the interface, the method comprising:
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providing a correlation in the correlation unit between second-protocol tag identifications and first-protocol tag identifications from a reserved subset of first-protocol tag identifications that are not used for tags deployed in vehicles; wirelessly transmitting a message according to the first protocol from a first tag to the reader, the message comprising a unique first-protocol identification of the tag; wirelessly transmitting a message according to the second protocol from a second tag to the reader, the message comprising a unique second-protocol identification of the tag; selectively forwarding the first-protocol message from the reader to the central station and the second-protocol message from the reader to the mapping unit; in the mapping unit, generating and forwarding to the central station a new first-protocol message by extracting the second-protocol tag identification from the second-protocol message, retrieving that first-protocol tag identification that correlates to the extracted second-protocol tag identification from the correlation unit, and generating said new first-protocol message by copying information from said second-protocol message according to a predetermined mapping between the second protocol and the first protocol while replacing the second-protocol tag identification by the retrieved first-protocol tag identification, and forwarding the generated new first-protocol message to the central station; and in the central station, receiving and storing the first-protocol message from the reader as well as the new first-protocol message from the mapping unit and identifying a vehicle by means of the first-protocol tag identification thereof. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification