Method for multi-reading a plurality of IDs

Details Method for multi-reading a plurality of IDs Method for multi-reading a plurality of IDs

2003-07-03

2008-09-30

Zimmerman, Brian (Department: 2612)

Communications: electrical

Selective

Interrogation response

C340S010200, C340S010310, C340S572400, C340S870030, C340S870030

Reexamination Certificate

active

07429912

ABSTRACT:
A interrogator1specifies the maximum read range (S0, e0) in which IDs to be read may exist (Step S1), and the interrogator1transmits a read request command to transponders2(Step S2. When there is/are a response/responses, it is judged if the response(s) is/are from a single transponder2or multiple transponders2(Step S5). When identifying multiple responses, an exponent e of the read range (S, e) is updated to e′=e−1 (Step S6). When identifying a single response, ID of the transponder2that responded is read out (Step S8) and the start S of the read range (S, e) is updated to S′=S+d (=2e) (Step S9). When a previous response flag F is not set to “multiple responses received”, the exponent e of the read range (S, e) is updated to e′=e+1 (Step S13).

REFERENCES:
patent: 5266925 (1993-11-01), Vercellotti et al.
patent: 5339073 (1994-08-01), Dodd et al.
patent: 5489908 (1996-02-01), Orthmann et al.
patent: 6072801 (2000-06-01), Wood et al.
patent: 6177858 (2001-01-01), Raimbault et al.
patent: 6486769 (2002-11-01), McLean
patent: 09-223201 (1997-08-01), None
patent: 10-126308 (1997-08-01), None
patent: 2000-252857 (2000-09-01), None
patent: 2001-168759 (2001-06-01), None
patent: 2003-168997 (2003-06-01), None
English Language Abstract of JP 2001-168759.
English Language Abstract of JP2000-252857.
English Language Abstract of JP10-126308.
English Language Abstract of JP09-223201.
English Language Abstract of JP 2003-168997.

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