Method, transponder, and system for rapid data transmission

• US 20080008265A1
• Filed: 06/25/2007
• Published: 01/10/2008
• Est. Priority Date: 06/23/2006
• Status: Active Grant

• Current Assignee: Atmel Corporation (Microchip Technology Incorporated)
• Original Assignee: Atmel Corporation (Microchip Technology Incorporated)
• Inventors: Friedrich, Ulrich, Fischer, Martin, Ziebertz, Dirk, Masuch, Jens, Pangels, Michael
• Granted Patent: US 8,160,253 B2
• Time in Patent Office: Days
• US Class Current: 375/309
• 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 for wireless data transmission between a base station and a passive, backscatter-based transponder, wherein a message including at least one command and one data sequence that is transmitted by the base station is received and evaluated by the transponder, the method comprising:

providing at least one key in the transponder after receipt of a command and before complete receipt of the message;

transmitting the key to the base station;

detecting the key by the base station; and

encoding parts of the message that are still to be transmitted and/or subsequent messages by the base station with the key.

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

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

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

5. The method according to 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 according to 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 according to claim 1, wherein a random number or random number sequence is generated as the key.

8. The method according to claim 7, wherein the random number or random number sequence is generated with use of a random number generator, particularly a linear feedback shift register.

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

10. The method according to claim 1, wherein a key sequence is generated by a keystream generator and/or as a result of an authentication process.

11. A transponder, particularly a passive and/or backscatter-based transponder, for wireless data transmission from and to a base station, wherein a message including at least one command and one data sequence that is transmitted by the base station is received and evaluated by the transponder, wherein after receipt of the command and before complete receipt of the message, at least one key is provided by the transponder and transmitted to the base station and then received parts of the message and/or subsequent messages are decodable by the transponder with the key.

12. A system for wireless data transmission, comprising:

a transponder, the transponder being a passive and/or backscatter-based transponder; and

a base station, wherein a message including at least one command and one data sequence is transmitted from the base station to the transponder and is received and evaluated by the transponder,

wherein, after receipt of the command and before complete receipt of the message, at least one key is provided by the transponder and transmitted to the base station, the transmitted key being detected by the base station and parts of the message that are still to be transmitted and/or subsequent messages are encodable with the key, and

wherein parts of the message, received encoded, are decodable by the transponder.