[RELIABLE METHOD OF DETERMINING TAG BINARY IDENTIFICATIONS]

• US 20050068156A1
• Filed: 12/04/2003
• Published: 03/31/2005
• Est. Priority Date: 09/30/2003
• Status: Abandoned Application

• Current Assignee: Synage Technology Corporation
• Original Assignee: Synage Technology Corporation
• Inventors: Chuang, Chow-Chin, Chen, Chi-Yuan
• Application Number:
  US10/707,297
• Publication Number:
  US 20050068156A1
• Time in Patent Office: Days
• US Class Current: 340/10.200
• 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

A method of determining tag identifications is discloses. The method comprises: providing an index signal; receiving a responsive signal generated from tag matching the index signal; obtaining an identification code corresponding to the responsive signal; reader sending an acknowledgement and waiting for tag to respond a returned-acknowledgement. A searching process is repeated at the current node after a tag responsive signal is received to prevent signal suppression errors.

Claims

1. A method of determining tag binary identifications, which comprising:

(a) a reader sending an index signal;

(b) the reader receiving a tag responsive signal associated with the index signal;

(c) the reader reads a tag identification based on the tag responsive signal;

(d) the reader sending an acknowledgement to the tag; and

(e) the tag returning a returned-acknowledgement to the reader.

2. The method of claim 1, wherein the acknowledgement makes the tag does not respond again until the reader is reset.

3. The method of claim 2, further comprising:

(f) resending the index signal after the returned-acknowledgement is received; and

(g) steps (c)˜

(e) are repeated if the tag responsive signal associated with the index signal is received.

4. The method of claim 1, wherein step (e) comprises:

determining the tag identifications is correct if the returned-acknowledgement is received in a pre-determined time; and

determining the tag identification is incorrect if the returned-acknowledgement is not received in the pre-determined time.

5. The method of claim 1, wherein the tag identification is obtained from contents of the responsive signal.