High priority RFID tags system and method

• US 20080157934A1
• Filed: 12/27/2006
• Published: 07/03/2008
• Est. Priority Date: 12/27/2006
• Status: Abandoned Application

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Posamentier, Joshua
• Application Number:
  US11/647,102
• Publication Number:
  US 20080157934A1
• Time in Patent Office: Days
• US Class Current: 340/10.42
• 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: H04W 74/06 using polling

Abstract

According to some embodiments, RFID tags may be assigned a priority level. RFID tags with higher priority levels may respond multiple times to a single interrogation signal. Further, a data-rich RFID tag may response multiple times to a single interrogation signal but with differing payloads. Further, an RFID tag may identify an unused slot and provide a response prior to the end of the slot.

Claims

1. A system comprising:

an antenna; and

a radio frequency identification (RFID) tag configured to provide multiple responses to a single interrogation signal.

2. The system as recited in claim 1, wherein the multiple responses contain a same data payload.

3. The system as recited in claim 1, wherein the multiple responses contain different data payloads.

4. The system as recited in claim 1, wherein the RFID tag includes a random number generator to determine when each of the multiple responses is provided.

5. The system as recited in claim 1, wherein the multiple responses are provided in response slots, wherein the number of response slots is according to an assigned priority of the RFID tag.

6. The system as recited in claim 1, wherein the RFID tag is further configured to sense an unused slot and provide a response before the end of the slot.

7. The system as recited in claim 1, wherein the RFID tag is further configured to not provide a response if a tag read signal is received.

8. A method comprising:

receiving a radio frequency (RF) interrogation signal; and

providing multiple responses to the RF interrogation signal.

9. The method as recited in claim 8, wherein the multiple responses contain a same data payload.

10. The method as recited in claim 8, wherein the multiple responses contain different data payloads.

11. The method as recited in claim 8, further comprising determining when each of the multiple responses is to be provided using a random number generator.

12. The method as recited in claim 8, wherein the number of multiple responses is according to an assigned priority.

13. The method as recited in claim 8, further comprising sensing an unused slot and providing a response before the end of the slot.

14. A method comprising:

sending an interrogation signal; and

receiving multiple radio frequency identification (RFID) tag responses to the interrogation signal; and

determining a good tag read from a collision;

wherein at least two of the multiple RFID tag responses are from the same RFID tag.

15. The method as recited in claim 14, wherein the at least two of the multiple RFID tag responses contain a same data payload.

16. The method as recited in claim 14, wherein the at least two of the multiple RFID tag responses contain different data payloads.

17. The method as recited in claim 14, wherein the number of the at least two of the multiple RFID tag responses is according to an assigned priority.

18. The method as recited in claim 14, further comprising sending an RF signal to disable responses from RFID tags with good tag responses.