Method, transponder, and system for rapid data transmission

• US 8,160,253 B2
• Filed: 06/25/2007
• Issued: 04/17/2012
• Est. Priority Date: 06/23/2006
• Status: Active Grant

• Current Assignee: Atmel Corporation (Microchip Technology Incorporated)
• Original Assignee: Atmel Corporation (Microchip Technology Incorporated)
• Inventors: Fischer, Martin, Friedrich, Ulrich, Masuch, Jens, Pangels, Michael, Ziebertz, Dirk
• Primary Examiner(s): EL HADY, NABIL M
• Application Number:
  US11/819,144
• Publication Number:
  US 20080008265A1
• Time in Patent Office: 1,758 Days
• Field of Search: 380/35, 380/37, 380/42, 380/43, 380/262, 380/270, 380/271, 380/255, 713/160, 713/150
• US Class Current: 380/270
• 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
• CPC Class Codes: H04L 2209/80 Wireless network architectures or network communication protocols for wireless network security H04W12/00
• CPC Class Codes: H04L 9/0662 with particular pseudorandom sequence generator
• CPC Class Codes: H04L 9/0869 involving random numbers or seeds

Abstract

A method for wireless data transmission between a base station and a transponder is provided, whereby a message, comprising at least one command and one data sequence, is transmitted by the base station, the message is received and evaluated by the transponder, at least one key is provided in the transponder after receipt of the command and before complete receipt of the message and the key is transmitted to the base station, the key is detected by the base station, and parts of the message, still to be transmitted, and/or subsequent messages are encoded by the base station with the key.

Claims

1. A method comprising:

receiving, by a transponder, at least one portion of a message transmitted by a base station; and

after complete receipt of a command in the message and before complete receipt of a data sequence in the message;

transmitting at least one key to the base station; and

in response to the base station receiving and detecting the at least one key, receiving from the base station one or more subsequent portions of the data sequence in the message in an encoded form, the encoding of the one or more subsequent portions of the data sequence in the message being performed by the base station according to the at least one key, the base station not having encoded according to the at least one key one or more prior portions of the data sequence in the message received by the transponder.

2. The method of claim 1, wherein a signal reflected by the transponder is modulated with phase modulation or phase-shift keying.

3. The method of claim 2, wherein the signal reflected by the transponder is encoded in a time domain by 3-phase-1 coding.

4. The method of claim 2, wherein the signal reflected by the transponder is encoded in a frequency range by T1.5T coding, T2T coding, or F2F coding.

5. The method of claim 4, wherein a frequency used for coding the signal reflected by the transponder is detected by linear prediction by the base station.

6. The method of claim 4, wherein a frequency used for coding the signal reflected by the transponder is detected by a correlator approach by the base station.

7. The method of claim 1, wherein the at least one key comprises a randomly generated number or number sequence, one or more of the subsequent portions of the data sequence are encoded by the base station using one or more corresponding portions of the randomly generated number or number sequence.

8. The method of claim 7, wherein the randomly generated number or number sequence is generated with use of a linear feedback shift register.

9. The method of claim 7, wherein the randomly generated number or number sequence is generated with use of an analog noise generator.

10. The method of claim 1, wherein the at least on key comprises a key sequence generated by a keystream generator or from an authentication process.

11. The method of claim 1, further comprising decoding the one or more subsequent portions of the data sequence in the message according to the at least one key.

12. The method of claim 1, wherein the command and the one or more prior portions of the data sequence in the message are unencoded.

13. A transponder configured to:

receive at least one portion of a message transmitted by a base station; and

after complete receipt of a command and before complete receipt of a data sequence in the message;

transmit at least one key to the base station; and

in response to the base station receiving and detecting the at least one key, receive from the base station one or more subsequent portions of the data sequence in the message in an encoded form, the encoding of the one or more subsequent portions of the data sequence in the message being performed by the base station according to the at least one key, the base station not having encoded according to the at least one key one or more prior portions of the data sequence in the message received by the transponder.

14. The transponder of claim 13, wherein the at least one key comprises a randomly generated number or number sequence, one or more of the subsequent portions of the data sequence are encoded by the base station using one or more corresponding portions of the randomly generated number or number sequence.

15. The transponder of claim 14, wherein the randomly generated number or number sequence is generated with use of a linear feedback shift register.

16. The transponder of claim 14, wherein the randomly generated number or number sequence is generated with use of an analog noise generator.

17. The transponder of claim 13, wherein the at least on key comprises a key sequence generated by a keystream generator or from an authentication process.

18. The transponder of claim 13, further configured to decode the one or more subsequent portions of the data sequence in the message according to the at least one key.

19. The transponder of claim 13, wherein the command and the one or more prior portions of the data sequence in the message are unencoded.

20. A base station configured to:

transmit at least one portion of a message to a transponder; and

after complete receipt by the transponder of a command in the message and before complete receipt by the transponder of a data sequence in the message;

receive at least one key from the transponder; and

transmit to the transponder one or more subsequent portions of the data sequence in the message in an encoded form, the encoding of the one or more subsequent portions of the data sequence in the message being performed by the base station according to the at least one key, the base station not having encoded according to the at least one key one or more prior portions of the data sequence in the message received by the transponder.