Transponder system with acknowledgements associated with respective transponders

• US 20030210133A1
• Filed: 06/07/2003
• Published: 11/13/2003
• Est. Priority Date: 07/13/1998
• Status: Active Grant

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: Franz Amtmann
• Inventors: Amtmann, Franz
• Granted Patent: US 6,819,223 B2
• Time in Patent Office: Days
• US Class Current: 340/10.1
• CPC Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer

Abstract

During a communication operation in a transponder system, consisting of a write/read station (1) and at least one transponder (2), a selection data block (SDB) is transmitted from the station (1) to at least one transponder (2) and, in response to the received selection data block (SDB), at least one transponder (2) transmits an identification data block (IDB) to the station (1), after which the station (1) transmits, in response to the identification data block (IDB), an acknowledge data block (QDB) to a transponder (2), the bit configuration of the acknowledge data block (QDB) being formed while using only a part (PM1) of the identification data block (IDB) associated with a transponder (2).

Claims

1. A method for communication between a write/read station (1) of a transponder system and at least one transponder (2) of the transponder system,

in which a selection data block (SDB) is transmitted by the write/read station (1) to at least one transponder (2),

in which the transmitted selection data block (SDB) is received by at least one transponder (2), in which, after reception of the transmitted selection data block (SDB), at least one transponder (2) transmits an identification data block (IDB), which is associated with this transponder and has a given bit configuration, to the write/read station (1) in response to the transmitted selection data block (SDB),

in which the transmitted identification data block (IDB) is received by the write/read station (1),

in which, after the reception in the write/read station (1) of the identification data block (IDB) associated with a transponder (2), an acknowledge data block (QDB), which is associated with this transponder (2) and has a given bit configuration, is generated in response to the received identification data block (IDB),

in which the generated acknowledge data block (QDB) is transmitted by the write/read station (1) to the transponder (2) with which the generated acknowledge data block (QDB) is associated, and in which the transmitted acknowledge data block (QDB) is received by the transponder (2) with which the acknowledge data block (QDB) is associated, the acknowledge data block (QDB) associated with a transponder (2) being related to the identification data block (IDB) associated with this transponder (2),

characterized in that

in the write/read station (1) an acknowledge data block (QDB) is generated for each transponder (2) wherefrom an identification data block (IDB) has been received, the bit configuration of said acknowledge data block being formed while using only a part (PM1) of the identification data block (IDB) associated with the relevant transponder (2).

2. A method as claimed in claim 1, characterized in that the bit configuration of the acknowledge data block (QDB) each time generated in the write/read station (1) is calculated while using a hash value (HV) contained in the write/read station (1).

3. A method as claimed in claim 1, characterized in that like in the write/read station (1), the acknowledge data block (QDB) associated with a transponder (2) is also generated with a given bit configuration in this transponder (2),

that the acknowledge data block (QDB) generated in this transponder (2) and the acknowledge data block (QDB) generated in the write/read station (1) and transmitted to this transponder (2) are compared, and

that at least control information (QV) representing the comparison result is generated.

4. A method as claimed in claim 3, characterized in that the bit configuration of the acknowledge data block (QDB) generated in a transponder (2) is calculated while using a hash value (HV) contained in the transponder (2).

5. A write/read station (1) for a transponder system which is arranged to communicate with at least one transponder (2) of the transponder system and includes a generating stage (6) for generating a selection data block (SDB),

transmitter means (30) for transmitting the generated selection data block (SDB) to at least one transponder (2),

receiver means (30) for receiving an identification data block (IDB) which is transmitted to the write/read station (1) by a transponder (2), in response to the selection data block (SDB) transmitted to this transponder (2), and is associated with this transponder (2),

processing means (33, 34, 3) for processing a received identification data block (IDB),

generating means (10) for generating an acknowledge data block (QDB) which is associated with a transponder (2) and has a given bit configuration, and

transmitter means (30) for transmitting a generated acknowledge data block (QDB) to the transponder (2) with which the generated acknowledge data block (QDB) is associated,

the acknowledge data block (QDB) associated with a transponder (2) being related to the identification data block (IDB) associated with this transponder (2),

characterized in that

the generating means (10) are arranged to generate a respective acknowledge data block (QDB) for a transponder (2), the bit configuration of said acknowledge data block being formable while using only a part (PM1) of the identification data block (IDB) associated with the relevant transponder (2).

6. A write/read station (1) as claimed in claim 5, characterized in that

the generating means (10) include a memory (11) for storing a received identification data block (IDB), a part (PM1) of the stored identification data block (IDB) being readable from said memory (11) in dependence on a hash value (HV) contained in the write/read station (1), that the generating means (10) include a CRC8 stage (15) which can be supplied with the read part (PM 1) of the stored identification data block (IDB) and can output control information (k1) corresponding to the read part (PM1) of the stored identification data block (IDB), and that the generating means (10) include a generating stage (18) for generating an acknowledge data block (QDB) having a bit configuration which is determined by the control information (k1) output by the CRC8 stage (15).

7. A transponder (2) for a transponder system,

which transponder is arranged to communicate with at least one write/read station (1) and includes receiver means (40) for receiving a selection data block (SDB) transmitted by a write/read station (1),

processing means (51, 59) for processing a received selection data block (SDB),

transmitter means (40) for transmitting an identification data block, associated with the transponder (2), to a write/read station (1) in response to the selection data block (SDB) transmitted to the transponder (2) by the write/read station (1),

receiver means (40) for receiving an acknowledge data block (QDB), which is transmitted to the transponder (2) by the write/read station (1) in response to the identification data block (IDB) applied to the write/read station (1) by the transponder (2), is associated with the transponder (2), and has a given bit configuration, and

processing means (51, 60) for processing the received acknowledge data block (QDB),

characterized in that

the transponder (2) includes generating means (92) for generating the acknowledge data block (QDB) associated with the transponder (2), and that the transponder (2) includes comparison means (68) which can be supplied with the acknowledge data block (QDB) generated by the generating means (92) and with the acknowledge data block (QDB) transmitted by a write/read station (1) and received by the transponder (2), and can output at least control information (QV) representing the comparison result.

8. A transponder (2) as claimed in claim 7, characterized in that

the generating means (92) include a memory (46) for storing an identification data block (IDB), a part (PM1) of the stored identification data block (IDB) being readable from said memory (46) in dependence on a hash value (HV) contained in the transponder (2),

that the generating means (92) include a CRC8 stage (74) which can be supplied with the read part (PM1) of the stored identification data block (IDB) and can output control information (k1) corresponding to the read part (PM1) of the stored identification data block (IDB), and

that the generating means (92) include a generating stage (87) for generating an acknowledge data block (QDB) having a bit configuration which is determined by the control information (k1) output by the CRC8 stage (74).

10. An integrated circuit (42) as claimed in claim 8, characterized in that

the generating means (92) include a memory (46) for storing an identification data block (IDB), a part (PM1) of the stored identification data block (IDB) being readable from said memory (46) in dependence on a hash value (HV) contained in the circuit (42),

that the generating means (92) include a CRC8 stage (74) which can be supplied with the read part (PM 1) of the stored identification data block (IDB) and can output control information (k1) corresponding to the read part (PM 1) of the stored identification data block (IDB), and that the generating means (92) include a generating stage (87) for generating an acknowledge data block (QDB) having a bit configuration which is determined by the control information (k1) output by the CRC8 stage (74).

9. An integrated circuit (42) for a transponder (2) which is arranged to

communicate with at least one write/read station (1), which integrated circuit includes receiving connection means (43) for receiving a selection data block (SDB) transmitted by a write/read station (1),

processing means (51, 59) for processing a received selection data block (SDB),

output connection means (43) for outputting an identification data block (IDB), associated with the circuit (42), to a write/read station (1) in response to the selection data block (SDB) transmitted to the circuit (42) by the write/read station (1),

receiver means (40) for receiving an acknowledge data block (QDB), which is transmitted to the circuit (42) by the write/read station (1) in response to the identification data block (IDB) transmitted to the write/read station (1), is associated with the circuit (42) and has a given bit configuration, and

processing means (51, 60) for processing the received acknowledge data block (QDB),

characterized in that

the circuit (42) includes generating means (92) for generating the acknowledge data block (QDB) associated with the circuit (42), and

that the circuit (42) includes comparison means (68) which can be supplied with the acknowledge data block (QDB) generated by the generating means (92) and with the acknowledge data block (QDB) transmitted by a write/read station (1) and received by the circuit (42), and can output at least control information (QV) representing the comparison result.