Transponder system with acknowledgements associated with respective transponders

• US 6,583,717 B1
• Filed: 07/12/1999
• Issued: 06/24/2003
• Est. Priority Date: 07/13/1998
• Status: Expired due to Term

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Amtmann, Franz
• Primary Examiner(s): Horabik, Michael
• Assistant Examiner(s): BROWN, VERNAL U
• Application Number:
  US09/352,317
• Time in Patent Office: 1,443 Days
• Field of Search: 340/10.1, 340/825.69, 340/10.3, 340/825.49, 340/10.32, 340/572.1, 340/10.2, 340/10.4, 340/10.51
• 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). In response to the identification data block (IDB), the station (1) transmits an acknowledge data block (QDB) to the transponder (2) identified in the identification data block (IDB), 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 the transponder (2).

Claims

1. A method for communication between a write/read station (1) of a transponder system and a plurality of transponders (2) of the transponder system, said method comprising:

operating the write/read station (1) to generate and transmit a selection data block (SDB) to the plurality of transponders (2);

operating a first transponder of the plurality of transponders (2) to transmit a first identification data block (IDB) to the write/read station (1) in response a reception of selection data block (SDB), the first identification data block (IDB) being associated with the first transponder; and

operating the write/read station (1) to transmit a first acknowledge data block (QDB) to the first transponder in response a reception of the first identification data block (IDB), the first acknowledge data block (QDB) having a bit configuration based on a part (PM1) of the first identification data block (IDB).

2. The method as claimed in claim 1, further comprising:

operating the write/read station (1) to formulate the bit configuration of the acknowledge data block (QDB) while using a hash value (HV) contained in the write/read station (1).

3. The method as claimed in claim 1, further comprising:

operating a second transponder of the plurality of transponders (2) to transmit a second identification data block (IDB) to the write/read station (1) in response a reception of transmitted selection data block (SDB), the second identification data block (IDB) being associated with the second transponder; and

operating the write/read station (1) to transmit a second acknowledge data block (QDB) to the second transponder in response a reception of the second identification data block (IDB), the second acknowledge data block (QDB) having a bit configuration based on a part (PM1) of the second identification data block (IDB).

4. The method as claimed in claim 1, further comprising:

operating the first transponder to generate a second acknowledge data block (QDB) related to the first identification data block (IDB);

operating the first transponder to generate a control information (CV) representative of a comparison of the first acknowledge data block (QDB) and the second acknowledge data block (QDB).

5. The method as claimed in claim 1, further comprising:

operating the first transponder to generate a second acknowledge data block (QDB) based on a hash value (HV) contained in the first transponder; and

operating the first transponder to generate a control information (CV) representative of a comparison of the first acknowledge data block (QDB) and the second acknowledge data block (QDB).

6. A write/read station (1) for a transponder system which is arranged to communicate with at least one transponder (2) of the transponder system, said write/read station (1) comprising:

a generating stage (6) for generating a selection data block (SDB);

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

receiver means (30) for receiving an identification data block (IDB) which is transmitted to said write/read station (1) from a first transponder of the at least one transponder (2), the identification data block (IDB) being associated with the first transponder;

generating means (10) for generating an acknowledge data block (QDB) having a bit configuration based on a part (PM1) of the identification data block (IDB); and

transmitter means (30) for transmitting the acknowledge data block (QDB) to the first transponder.

7. A transponder (2) for a transponder system, said transponder (2) arranged to communicate with a write/read station (1), said transponder (2) comprising:

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

receiver means (40) for receiving a first acknowledge data block (QDB) transmitted to said transponder (2) by the write/read station (1) in response to a reception of the identification data block (IDB) by the write/read station (1);

generating means (92) for generating a second acknowledge data block (QDB) in response to a reception of the first acknowledge data block (QDB) by said transponder (2), wherein the second acknowledge data block (QDB) has a bit configuration based on a part of the identification data block (IDB); and

comparison means (68) for outputting control information (QV) representative of a comparison of the first acknowledge data block (QDB) and the second acknowledge data block (QDB).

8. A write/read station (1) for a transponder system which is arranged to communicate with at least one transponder (2) of the transponder system, said write/read station (1) comprising:

a generating stage (6) for generating a selection data block (SDB);

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

receiver means (30) for receiving an identification data block (IDB) which is transmitted to said write/read station (1) from a first transponder of the at least one transponder (2), the identification data block (IDB) being associated with the first transponder;

a memory (11) for storing the identification data block (IDB), wherein a part (PM1) of the stored identification data block (IDB) is readable from said memory (11) in dependence on a hash value (HV) contained in said write/read station (1);

a control information stage (15) for outputting a control information (k1) corresponding to the part (PM1) of the identification data block (IDB);

a generating stage (18) for generating an acknowledge data block (QDB) having a bit configuration which is determined by the control information (k1); and

transmitter means (30) for transmitting the acknowledge data block (QDB) to the first transponder.

9. A transponder (2) for a transponder system, said transponder (2) arranged to communicate with a write/read station (1), said transponder (2) comprising:

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

receiver means (40) for receiving a first acknowledge data block (QDB) transmitted to said transponder (2) by the write/read station (1) in response to a reception of the identification data block (IDB) by the write/read station (1);

a memory (46) for storing the identification data block (IDB), wherein a part (PM1) of the stored identification data block (IDB) is readable from said memory (46) in dependence on a hash value (HV) contained in said transponder (2);

a control information stage (74) for outputting control information (k1) corresponding to the part (PM1) of the identification data block (IDB);

a generating stage (87) for generating a second acknowledge data block (QDB) having a bit configuration which is determined by the control information (k1); and

comparison means (68) for outputting control information (QV) representative of a comparison of the first acknowledge data block (QDB) and the second acknowledge data block (QDB).