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CA2187539A1 - Method and radio frequency identification system for a novel protocol for reliable communication - Google Patents

Method and radio frequency identification system for a novel protocol for reliable communication


Publication number
CA2187539A1 CA 2187539 CA2187539A CA2187539A1 CA 2187539 A1 CA2187539 A1 CA 2187539A1 CA 2187539 CA2187539 CA 2187539 CA 2187539 A CA2187539 A CA 2187539A CA 2187539 A1 CA2187539 A1 CA 2187539A1
Grant status
Patent type
Prior art keywords
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Application number
CA 2187539
Other languages
French (fr)
Other versions
CA2187539C (en )
Thomas Joseph Walczak
Donald Bernard Lemersal, Jr.
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorola Solutions Inc
Original Assignee
Motorola Solutions Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date



    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/0008General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer


Reliable communication is provided by a radio frequency identification system comprising at least one of an interrogator (102) and a transponder (104). The interrogator (102) transmits a plurality of interrogator frames (106) and receives at least one of a plurality of transponder frames (114). The transponder (104) transmits the plurality of transponder frames (114) and receives at least one of the plurality of interrogator frames ( 106). Each frame in the plurality of interrogator frames and the plurality of transponder frames includes an initialization sequence (108 and 116), at least one information sequence of a first predetermined length (110 and 118), and a check sequence of a second predetermined length (112 and 120) for each information sequence.
CA 2187539 1995-03-13 1996-01-11 Method and radio frequency identification system for a novel protocol for reliable communication Expired - Fee Related CA2187539C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US40259995 true 1995-03-13 1995-03-13
US08/402,599 1995-03-13
PCT/US1996/000194 WO1996028941A1 (en) 1995-03-13 1996-01-11 Radio frequency identification system for reliable communication

Publications (2)

Publication Number Publication Date
CA2187539A1 true true CA2187539A1 (en) 1996-09-19
CA2187539C CA2187539C (en) 2000-05-02



Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2187539 Expired - Fee Related CA2187539C (en) 1995-03-13 1996-01-11 Method and radio frequency identification system for a novel protocol for reliable communication

Country Status (5)

Country Link
US (1) US5818348A (en)
EP (1) EP0776577A4 (en)
CN (1) CN1148456A (en)
CA (1) CA2187539C (en)
WO (1) WO1996028941A1 (en)

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US7688206B2 (en) 2004-11-22 2010-03-30 Alien Technology Corporation Radio frequency identification (RFID) tag for an item having a conductive layer included or attached
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CN101470791B (en) * 2007-12-29 2015-05-27 华为技术有限公司 Radio frequency signal recognition and response method and system, label and reading device
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Also Published As

Publication number Publication date Type
CN1148456A (en) 1997-04-23 application
EP0776577A4 (en) 1999-02-24 application
EP0776577A1 (en) 1997-06-04 application
CA2187539C (en) 2000-05-02 grant
WO1996028941A1 (en) 1996-09-19 application
US5818348A (en) 1998-10-06 grant

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