Global patent index - EP 1068738 A1

EP 1068738 A1 2001-01-17 - SYNCHRONIZATION METHOD FOR RFID SYSTEM INCLUDING TAGS HAVING DIFFERENT MEMORY SIZES

Title (en)

SYNCHRONIZATION METHOD FOR RFID SYSTEM INCLUDING TAGS HAVING DIFFERENT MEMORY SIZES

Title (de)

SYNCHRONISATIONSVERFAHREN FÜR RFID SYSTEM MIT ETIKETTEN MIT UNTERSCHIEDLICHEN SPREICHERGRÖSSEN

Title (fr)

PROCEDE DE SYNCHRONISATION POUR UN SYSTEME HFID COMPRENANT DES ETIQUETTES PRESENTANT DES CAPACITES DE MEMOIRE DIFFERENTES

Publication

EP 1068738 A1 (EN)

Application

EP 99909858 A

Priority

  • US 9904860 W
  • US 7798798 P
  • US 25659199 A

Abstract (en)

[origin: WO9946940A1] A synchronization method for an RFID system (10) including tags (40-1 to 40-n) having different memory sizes, employs a convention wherein sync words and sync bits are stored in tag memory (407) among data bits so that a reader (30) may readily identify the sync word on an RF signal (408) transmitted by a tag (40-1) and serially modulated by repetitions of the contents of the tag memory (407). After identifying the sync word, an RFID reader (30) reads data bits following the identified sync word until a next sync word is received, while ignoring the sync bits interspersed among the data bits.

IPC 1-7 (main, further and additional classification)

H04Q 1/00; G06F 11/10; G06F 17/00; G08G 1/01

IPC 8 full level (invention and additional information)

G06F 11/10 (2006.01); G06K 7/00 (2006.01); G06K 17/00 (2006.01); G06K 19/07 (2006.01); G07C 9/00 (2006.01); G08G 1/017 (2006.01)

CPC (invention and additional information)

G06K 7/0008 (2013.01); G06K 19/0723 (2013.01); G07C 9/00111 (2013.01); G08G 1/017 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9946940 A1 19990916; AU 2896699 A 19990927; BR 9908714 A 20001121; CA 2322152 A1 19990916; CN 1313011 A 20010912; EP 1068738 A1 20010117; EP 1068738 A4 20020703; IL 137749 D0 20011031; JP 2003532935 A 20031105

INPADOC legal status

2002-08-14 [18W] WITHDRAWN

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2002-07-03 [A4] SUPPLEMENTARY SEARCH REPORT

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2002-07-03 [RIC1] CLASSIFICATION (CORRECTION)

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2001-01-17 [17P] REQUEST FOR EXAMINATION FILED

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