WO1998011496A1 - Verfahren zum übertragen von daten in einem radiofrequenz identifikations-system - Google Patents
Verfahren zum übertragen von daten in einem radiofrequenz identifikations-system Download PDFInfo
- Publication number
- WO1998011496A1 WO1998011496A1 PCT/EP1997/005010 EP9705010W WO9811496A1 WO 1998011496 A1 WO1998011496 A1 WO 1998011496A1 EP 9705010 W EP9705010 W EP 9705010W WO 9811496 A1 WO9811496 A1 WO 9811496A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sent
- signal
- reader
- response signal
- transponder
- Prior art date
Links
Classifications
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
- G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
- G07F7/10—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means together with a coded signal, e.g. in the form of personal identification information, like personal identification number [PIN] or biometric data
- G07F7/1008—Active credit-cards provided with means to personalise their use, e.g. with PIN-introduction/comparison system
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0723—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0723—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
- G06K19/0726—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs the arrangement including a circuit for tuning the resonance frequency of an antenna on the record carrier
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q20/00—Payment architectures, schemes or protocols
- G06Q20/30—Payment architectures, schemes or protocols characterised by the use of specific devices or networks
- G06Q20/34—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using cards, e.g. integrated circuit [IC] cards or magnetic cards
- G06Q20/341—Active cards, i.e. cards including their own processing means, e.g. including an IC or chip
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q20/00—Payment architectures, schemes or protocols
- G06Q20/38—Payment protocols; Details thereof
- G06Q20/40—Authorisation, e.g. identification of payer or payee, verification of customer or shop credentials; Review and approval of payers, e.g. check credit lines or negative lists
- G06Q20/409—Device specific authentication in transaction processing
- G06Q20/4097—Device specific authentication in transaction processing using mutual authentication between devices and transaction partners
- G06Q20/40975—Device specific authentication in transaction processing using mutual authentication between devices and transaction partners using encryption therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
- G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
- G11C11/41—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming static cells with positive feedback, i.e. cells not needing refreshing or charge regeneration, e.g. bistable multivibrator or Schmitt trigger
- G11C11/413—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing, timing or power reduction
- G11C11/417—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing, timing or power reduction for memory cells of the field-effect type
- G11C11/419—Read-write [R-W] circuits
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/10—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
- G11C7/1048—Data bus control circuits, e.g. precharging, presetting, equalising
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/10—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
- G11C7/1051—Data output circuits, e.g. read-out amplifiers, data output buffers, data output registers, data output level conversion circuits
Definitions
- the invention relates to a method for transmitting data in a radio frequency identification system from a transponder to a reading device by modulating the load of an interrogation signal transmitted by the reading device
- a system In the identification of people, animals and objects, a system has proven itself in recent years in which a (stationary or portable) reader (reader) supplies a transponder connected to the object to be identified with energy via an alternating field, whereupon the transponder responds by sending the data stored in it. Due to the frequency range used, one speaks of radio frequency identification systems, or RFID for short.
- An RFID transponder generally consists of an antenna coil and an integrated circuit that contains all the necessary electronic circuit blocks, such as. B. for power supply, clock generation, sequence control and storage of the data necessary for identification, includes.
- the capacitance connected in parallel to the antenna coil is also often part of the integrated circuit. However, it can also be formed by a discrete component.
- the RFID reader consists of a resonant circuit with a transmitter coil and a capacitance, which is driven by a driver stage with a signal with a generally fixed frequency (e.g. 125 kHz), the reader further contains electronic circuit blocks around which the Detect absorption modulation data sent by the transponder and around data and commands, e.g. B. by modulating the field to send to the transponder.
- a generally fixed frequency e.g. 125 kHz
- the reader and transponder form a loosely coupled transformer for data or energy transmission.
- the energy transfer is therefore relatively low.
- the identification i.e. the data exchange between transponder and reader runs without delay.
- the problem arises that when starting a motor vehicle, the user perceives a time delay of more than 150 ms, from turning the ignition key to starting the engine, as a time delay. It follows that the entire transmission protocol must have expired in this very short period of time.
- the reader When the field is switched on, the reader needs approximately two milliseconds before the high coil voltage of approximately 100 V has built up and the low useful signal of a few millivolts resulting from the modulation of the transponder can be evaluated and the data can thus be decoded correctly.
- the ID code initially sent by the transponder is therefore only recognized in the second sequence, which means a time delay in the data protocol.
- a similar problem occurs when changing from an undamped to the damped state, such as. B. at the end of a write sequence or programming sequence.
- the object of the invention is therefore to provide a method for transmitting data in a radio frequency identification system from a transponder to a reader by load modulation of an interrogation signal sent by the reader, which delivers the correct result by means of a single data transmission.
- the predetermined number of data bits not belonging to the response signal bridges the period of time that the reading device needs to set up the query field.
- the reader is synchronized to the clock of the response signal. Due to the terminator sequence, which indicates the beginning of a valid response signal, this is recognized correctly by the reading device already during the first transmission.
- the terminator sequence advantageously consists of a bit sequence that cannot occur in the actual response signal, for example, when the terminator sequence is sent, the interrogation signal is unmodulated for a period of 1.5 bit periods. Such a sequence cannot occur in the actual response signal and is therefore reliably recognized by the reading device. It is also possible to load modulate the query signal for a period of 1.5 bit periods when the terminator sequence is sent.
- the time period of 1.5 bit periods, which are reliably recognized by the reader as a terminator sequence, is important for reliable detection.
- a sequence of 3 to 10 logic ones are sent as the predetermined number of data bits not belonging to the response signal.
- the query signal has generally built up to such an extent that the load-modulated response signal can be safely decoded by the reading device.
- Figure 1 flow chart of the method
- Figure 2 shows a terminator in data flow
- Figure 3 shows a table with the operating states that lead to the sending of the terminator.
- the transponder sends at the beginning of the data transmission, such as. B. during initialization, some irrelevant data bits, followed by a special, data-non-typical pattern (terminator), which is composed, for example, of sequences of 1.5 bit periods.
- a special, data-non-typical pattern (terminator)
- the reader is synchronized and the start of a valid data word is also indicated by the terminator sequence, so that this is recognized correctly during the first transmission.
- FIG. 1 shows a flow chart of the method.
- the transponder After receiving the interrogation signal generated by the reader, the transponder is initialized. The initialization includes setting the communication parameters and transferring the transponder to a defined initial state. The transponder then begins to send data to the reader by modulating the load on the interrogation signal in order to give the reader enough time to generate a constant interrogation signal within a certain range, which is necessary for the safe decoding of the data sent from the transponder to the reader first a predetermined number of data bits not belonging to the response signal are sent, during which time the reader is also synchronized with the response signal.
- a terminator sequence is then sent, which is distinguished by the fact that it cannot occur in the actual data flow.
- a 3-bit sequence in which the interrogation signal is unmodulated for a duration of 1.5 bit periods has proven to be particularly advantageous.
- Figure 2 shows a terminator in data flow. In addition to the property that this sequence cannot occur in the actual data flow, it is characterized by the very short duration.
- the response signal is sent to the reader. If the reader has recognized the terminator sequence, the response signal is immediately decoded correctly with a very high probability. Nevertheless, the response signal followed by a terminator sequence is repeatedly sent by the transponder until the query signal is interrupted. Then either the communication between the reading device and the transponder is ended or the reading device transmits data or commands to the transponder.
- the table in FIG. 3 describes a series of operating states in which it makes sense to send a terminator sequence in order to increase the effectiveness of the data transmission. In addition to the initialization, it is also the transition from writing access to reading access after a Write errors, in the case of direct access and when sending a crypto response, it is advantageous to supplement the response signal with the terminator sequence.
- the data can be recognized correctly the first time it is transmitted. This shortens the duration of the data transmission.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59703244T DE59703244D1 (de) | 1996-09-13 | 1997-09-13 | Verfahren zum übertragen von daten in einem radiofrequenz identifikations-system |
EP97944877A EP0925548B1 (de) | 1996-09-13 | 1997-09-13 | Verfahren zum übertragen von daten in einem radiofrequenz identifikations-system |
AU46228/97A AU4622897A (en) | 1996-09-13 | 1997-09-13 | Data transfer method for a scanning identification system |
JP51327398A JP3867251B2 (ja) | 1996-09-13 | 1997-09-13 | 無線周波数識別システムにおいてデータを伝送する方法 |
US09/254,867 US6426692B1 (en) | 1996-09-13 | 1997-09-13 | Data transfer method for a scanning identification system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19637319.0 | 1996-09-13 | ||
DE19637319 | 1996-09-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998011496A1 true WO1998011496A1 (de) | 1998-03-19 |
Family
ID=7805530
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1997/005010 WO1998011496A1 (de) | 1996-09-13 | 1997-09-13 | Verfahren zum übertragen von daten in einem radiofrequenz identifikations-system |
PCT/EP1997/005013 WO1998011553A1 (de) | 1996-09-13 | 1997-09-13 | Ram speicheranordnung |
PCT/EP1997/005011 WO1998011505A1 (de) | 1996-09-13 | 1997-09-13 | Verfahren zum abgleich eines empfangsschwingkreises eines transponders in einem rfid system |
PCT/EP1997/005012 WO1998011689A2 (de) | 1996-09-13 | 1997-09-13 | Verfahren zur kryptologischen authentifizierung in einem radiofrequenz-identifikations-system |
Family Applications After (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1997/005013 WO1998011553A1 (de) | 1996-09-13 | 1997-09-13 | Ram speicheranordnung |
PCT/EP1997/005011 WO1998011505A1 (de) | 1996-09-13 | 1997-09-13 | Verfahren zum abgleich eines empfangsschwingkreises eines transponders in einem rfid system |
PCT/EP1997/005012 WO1998011689A2 (de) | 1996-09-13 | 1997-09-13 | Verfahren zur kryptologischen authentifizierung in einem radiofrequenz-identifikations-system |
Country Status (7)
Country | Link |
---|---|
US (3) | US6510517B1 (de) |
EP (3) | EP0925665B1 (de) |
JP (3) | JP3867251B2 (de) |
AU (4) | AU4622897A (de) |
DE (3) | DE59707804D1 (de) |
ES (3) | ES2172769T3 (de) |
WO (4) | WO1998011496A1 (de) |
Cited By (1)
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WO2000054210A1 (de) * | 1999-03-11 | 2000-09-14 | Siemens Aktiengesellschaft | System zur berührungslosen, seriellen übertragung von daten aus insbesondere schnell bewegten, mobilen datenträgern, und bevorzugte verwendungen des systems |
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Also Published As
Publication number | Publication date |
---|---|
US6426692B1 (en) | 2002-07-30 |
US6510517B1 (en) | 2003-01-21 |
DE59706402D1 (de) | 2002-03-21 |
JP2001501391A (ja) | 2001-01-30 |
AU4458297A (en) | 1998-04-02 |
WO1998011689A2 (de) | 1998-03-19 |
AU4458397A (en) | 1998-04-02 |
AU4702997A (en) | 1998-04-02 |
EP0925548B1 (de) | 2001-03-28 |
EP0925548A1 (de) | 1999-06-30 |
ES2157089T3 (es) | 2001-08-01 |
JP3867251B2 (ja) | 2007-01-10 |
WO1998011553A1 (de) | 1998-03-19 |
EP0925665B1 (de) | 2002-02-13 |
EP0925551A1 (de) | 1999-06-30 |
WO1998011505A1 (de) | 1998-03-19 |
EP0925665A2 (de) | 1999-06-30 |
DE59703244D1 (de) | 2001-05-03 |
JP2001500685A (ja) | 2001-01-16 |
ES2172769T3 (es) | 2002-10-01 |
JP3890510B2 (ja) | 2007-03-07 |
JP2001501051A (ja) | 2001-01-23 |
EP0925551B1 (de) | 2002-07-24 |
ES2179369T3 (es) | 2003-01-16 |
AU4622897A (en) | 1998-04-02 |
US6272321B1 (en) | 2001-08-07 |
DE59707804D1 (de) | 2002-08-29 |
WO1998011689A3 (de) | 1998-05-14 |
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