RFID Tag System and Data Stream Thereof

• US 20080068135A1
• Filed: 02/13/2007
• Published: 03/20/2008
• Est. Priority Date: 09/01/2006
• Status: Abandoned Application

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Kung, Chen Pang, Chen, Hung Chun, Pei, Zing Way
• Application Number:
  US11/674,151
• Publication Number:
  US 20080068135A1
• Time in Patent Office: Days
• US Class Current: 340/10.4
• CPC Class Codes: G06K 19/0723 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
• CPC Class Codes: G06K 7/10297 arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092 cryptographic protocols H04L9/00; network security protocols H04L63/00; real-time communication protocols in data switching networks H04L65/00; network protocols for data switching network services H04L67/00
• CPC Class Codes: H04B 5/00 Near-field transmission systems, e.g. inductive or capacitive transmission systems
• CPC Class Codes: H04B 5/0031 for data transfer
• CPC Class Codes: H04B 5/0037 for power transfer
• CPC Class Codes: H04B 5/0062 in RFID [Radio Frequency Identification] Systems
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/77 for interrogation
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

An RFID tag system comprises at least one RFID tag and a reader. The RFID tag outputs a data stream including a head with a plurality of bits set to a sequence of certain levels and a body succeeding the head. The reader can detect the coding frequency of the data stream outputted from the RFID tag according to the known levels in the sequence, and then, read the body data based on the detected frequency.

Claims

1. An RFID tag system, comprising:

at least an RFID tag for outputting a data stream, the data stream including a head with a plurality of bits set to a sequence of certain levels; and

a reader for detecting a coding frequency of the data stream outputted from the RFID tag according to the levels in the sequence.

2. The RFID tag system of claim 1, wherein the sequence is recorded in a preamble of the data stream.

3. The RFID tag system of claim 2, wherein the data stream further comprises a body data succeeding the preamble and acting as identification.

4. The RFID tag system of claim 3, wherein the data stream comprises at least one of an identity code, a series number and an object is class code.

5. The RFID tag system of claim 3, wherein the data stream further comprises an end of file (EOF) succeeding the body data.

6. The RFID tag system of claim 1, wherein the RFID tag further comprises a memory for storing the data stream.

7. The RFID tag system of claim 6, wherein the RFID tag comprises a controller for reading the data stream stored in the memory by referring to a standard clock.

8. The RFID tag system of claim 7, wherein the standard clock is generated by an oscillator.

9. The RFID tag system of claim 7, wherein the standard clock is generated by an annular oscillator.

10. The RFID tag system of claim 1, wherein the RFID tag comprises an encoder for conducting a binary coding on the data stream.

11. The RFID tag system of claim 10, wherein the encoder adopts a Manchester coding method to conduct a binary coding on the data stream.

12. A data stream used in an RFID tag system, comprising:

a preamble acting as a head of a data stream with a plurality of bits, the preamble set to a sequence of certain levels, wherein the sequence represents verification data of a coding frequency in the RFID tag system; and

a body data recording data for identification.

13. The data stream used in the RFID tag system of claim 12, further comprising an EOF succeeding the body data.