WO2004059561A1 - Procede de liberation d'une transmission de donnees entre un dispositif d'ecriture/lecture et au moins une memoire de donnees mobile - Google Patents

Procede de liberation d'une transmission de donnees entre un dispositif d'ecriture/lecture et au moins une memoire de donnees mobile Download PDF

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Publication number
WO2004059561A1
WO2004059561A1 PCT/EP2003/014136 EP0314136W WO2004059561A1 WO 2004059561 A1 WO2004059561 A1 WO 2004059561A1 EP 0314136 W EP0314136 W EP 0314136W WO 2004059561 A1 WO2004059561 A1 WO 2004059561A1
Authority
WO
WIPO (PCT)
Prior art keywords
data memory
mobile data
write
read
signal
Prior art date
Application number
PCT/EP2003/014136
Other languages
German (de)
English (en)
Inventor
Janos Gila
Wolfgang Konrad
Alexander Renner
Original Assignee
Siemens Aktiengesellschaft
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
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to AU2003292235A priority Critical patent/AU2003292235A1/en
Publication of WO2004059561A1 publication Critical patent/WO2004059561A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/82—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein continuous-type signals are transmitted
    • G01S13/825—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein continuous-type signals are transmitted with exchange of information between interrogator and responder
    • 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
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
    • G01S13/345—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal using triangular modulation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
    • G01S13/751—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal
    • G01S13/756—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal using a signal generator for modifying the reflectivity of the reflector

Definitions

  • the invention relates to a method for releasing data transmission between a read / write device and at least a mobile data memory, in particular in an identification system with at least one mobile data memory attached to objects for recording object-related status and / or process data, e.g. in a shipping, transport and / or manufacturing system of the individual objects.
  • Identification systems are known as prior art which contain one or more stationary read / write devices which exchange data with mobile data memories in a contactless manner via a data transmission link which is generally radio-based. Such systems are used in technical facilities in which a large number of objects or goods have to be moved as quickly and freely as possible.
  • the objects can be of various types, e.g. Parcels in a shipping facility, assembly parts in a production plant, luggage in a transport system and much more.
  • the standard provides for the read / write device to query for the presence of a mobile data memory in the detection area.
  • the write / read reader sends an unmodulated first carrier signal with a fixed carrier frequency, for example with a frequency of 2.45 GHz out.
  • This carrier signal can be passively sent back from a mobile data memory located in the reception area to the read / write device, for example by so-called "back scattering".
  • the mobile data memory modulates the impedance or the carrier phase of a transmit / receive antenna integrated in the mobile data memory in cyclic sequences with a significant recognition sequence for identifying the mobile data memory in a read / write device. If the first carrier signal that has been sent back and modulated with the recognition sequence can be received by the read / write device and has been recognized as valid, then this creates another carrier signal. When the second carrier signal is applied, the read / write device signals to the mobile data memory that a data transmission will follow. The second carrier signal is therefore modulated for data transmission. This carrier signal is queried cyclically and at short intervals for presence by the mobile data memory. If this is the case, the mobile data storage device can switch on the data receiver for the subsequent data transmission.
  • Interferences can e.g. Exceeding ranges of the reception area of a read / write device are caused by metallic surfaces in the area of the
  • the invention has for its object to provide a method for releasing a data transfer between a write / read reader and at least one mobile data memory. Furthermore, a write / read reader and an identification system for such a method are to be offered.
  • the method can also advantageously be operated in an identification system with at least one mobile data memory attached to objects for recording object-related status and process data.
  • a sinusoidal and cyclically repeated RF carrier signal is generated in at least one transmission channel with several channels and then transmitted.
  • the RF carrier signal is frequency modulated linearly in a frequency band between a lower and an upper frequency of the frequency band.
  • An RF carrier signal reflected by the respective mobile data memory is then received and mixed with the generated RF carrier signal in the write / read reader to form a frequency difference signal.
  • a distance value is then determined which represents the distance between the write / read device and the respective mobile data memory. The distance value is formed from the ratio of the current frequency difference in the frequency difference signal to the frequency band of the RF carrier signal.
  • an enable signal for data transmission between the write / read reader and the respective mobile data memory is formed, if the distance value is less than a specifiable limit.
  • the mixed frequency difference signal is subsequently integrated.
  • the temporal integration acts like filtering, which enables an increase in the signal-to-noise ratio.
  • a distance determination can then be carried out with the reflected signals with different phase positions, such methods with signals of different frequencies and their evaluation with regard to their phase positions being known per se.
  • an enable signal is advantageously only formed if a modulated data memory recognition received by the respective mobile data memory in the reflected RF signal has been recognized as valid.
  • Mobile data storage devices that are not intended for the respective write / read device are consequently no longer taken into account.
  • the subsequent actual user information can then be read out from the mobile data memory.
  • the data storage recognition and the useful information are modulated using the backscatter method.
  • a further and data-modulated HF carrier signal for data transmission from the write / read reader to the respective mobile len data storage is generated and sent if, according to the data carrier identification, it is a mobile data storage which can also receive and store data.
  • the distance measurement is carried out in a transmission channel with four channels. Signals of different frequencies are emitted on the individual channels.
  • the transmission channel can correspond to the notification channel of the ISO-18000-4-MOD3 standard.
  • U.U. For this purpose, at least one channel of the communication channel can also be used in accordance with the above. Standard.
  • the channels of the transmission channel can be R2 channels in the notification channel of the ISO 18000-4 MOD3 standard.
  • the write / read reader according to the invention and the identification system according to the invention serve to apply the described method according to the invention and can thus be used to carry out a release of a data transfer between the write / read reader and mobile data memories.
  • 1 shows an example of the use of two write / read devices and a plurality of mobile data memories on two adjacent production lines
  • 2 shows an exemplary data structure of a transmission channel
  • FIG. 4 shows an exemplary construction of a radar unit of a write / read reader for implementing the method according to the invention.
  • the mobile data memory DT1-DT ⁇ can e.g. attached to wagons or goods to identify them. Furthermore, the respective desired communication area KB1, KB2 with the associated communication distance DIST1, DIST2 of the write / read device SLG1, SLG2 is shown. In this case, the two identification systems, consisting of the two write / read readers SLG1, SLG2 and the associated mobile data memories DT1-DT6, do not interfere. A distortion of the communication area is possible due to the metallic surfaces mentioned at the beginning as an example. This is shown in the example of the figure. For this purpose, a distorted communication area VE1 of the write / read reader SLG 1 can be seen in dashed lines, in which the undesired mobile data memory DT5 is now located.
  • FIG. 2 shows an exemplary transmission channel of a mobile data memory DT1-DT6, which corresponds to the 'notification channel' based on the ISO 18000-4-MOD3 standard.
  • a mobile data memory DT1-DT6 which corresponds to the 'notification channel' based on the ISO 18000-4-MOD3 standard.
  • the channels K1 to K4 are now provided, which are used for the distance measurement according to the known method described. Based on ISO-18000-4- MOD3 standard, these channels K1 to K4 correspond to the R2 channels in the notification channel of the ISO 18000-4 MOD3 standard.
  • FIG. 3 shows an example of a cyclic ZT and frequency-modulated RF carrier signal TS and an associated reflected RF carrier signal RS in a common representation in a time-frequency diagram t, f.
  • the two HF signals TS, RS have a linear frequency profile between the two frequencies fl, f2 according to a sawtooth curve. Based on the above Standards can e.g. the
  • Frequency shift FH i.e. the difference between the two frequencies is 80 MHz in order to achieve sufficient accuracy for the distance measurement.
  • the two frequencies fl, f2 themselves can e.g. are in a frequency range of approximately 2.4 GHz to 2.5 GHz. In the figure are still the
  • Runtime difference dT between the transmitted TS and the reflected RS HF carrier signal and the difference frequency dF present for a selected point in time can be seen.
  • a sawtooth generator SG which controls a voltage-dependent frequency generator VCO, is used to generate the sawtooth-shaped HF carrier signal TS.
  • the generated HF carrier signal TS is then transmitted or emitted as an electromagnetic wave TW via a transmitting antenna ANT1.
  • These "radar waves” can be passively reflected or backscattered by a backscatter antenna BSA from a mobile data memory DT1-DT6 located nearby. Independently of this, the respective mobile data memory DT1-DT6 modulates its backscatter antenna BSA in order to cyclically transmit data, such as the data storage identification SIG to modulate the reflected RF carrier signal RS.
  • the backscattered “radar waves” RW are received by a receiving antenna ANT2 of the write / read reader SLG1 as a further RF carrier signal RS and at the same time with the RF signal that is just intended for the radiation.
  • Carrier signal TS using a mixer MIX mixed to a frequency difference signal FDS.
  • This signal FDS can subsequently be filtered FIL by interfering frequency components.
  • the difference frequency dF formed in the frequency difference signal FDS is then proportional to the signal transit time dT between the emitted and reflected RF carrier signal TS, RS.
  • Difference frequency dF - linked via the constant speed of light for the propagation speed of the "radar waves" TW, RW - is also proportional to the distance DIST between the write / read reader SLG and the respective mobile data memory DT1-DT6.
  • the arithmetically simulated distance value DIS ⁇ is then also included a limit value GW that can be stored in the write / read reader SLG1 is compared by means of a comparator CMP.
  • the distance value DIST is smaller than the limit value GW or, in other words, the respective mobile data memory DT1-DT2 is within a permissible predeterminable communication range KB1
  • an enable signal FG is sent to the The data modulated in the data signal DS and by the mobile data memory DT1-DT6 can then be further processed subsequently, so that the write-Z readers SLG1, SLG2 and the mobile data memory DT1-DT ⁇ can be moved with a smaller distance DIST1 , DIST2 zuei nander can be installed without unwanted interference caused by the lack of differentiation between neighboring write / read devices SLG1, SLG2 and mobile data memory DT1-DT ⁇ .

Abstract

L'invention concerne un procédé de libération d'une transmission de données entre un dispositif d'écriture/lecture (SLG1, SLG2) et au moins une mémoire de données mobile (DT1-DT6), procédé selon lequel un signal porteur haute fréquence (TS) cyclique (ZT) est généré et envoyé dans un canal de transmission (N-CH). Ce signal est modulé en fréquence de façon linéaire dans une bande de fréquences (FH). Un signal porteur (RS) réfléchi reçu par la mémoire de données est mélangé (MIX) avec le signal porteur haute fréquence produit pour former un signal de différence de fréquence (FDS). Ensuite est déterminée une valeur de distance (DIST') qui représente la distance (DIST1) séparant le dispositif de lecture/écriture et la mémoire de données correspondante. Cette valeur de distance est formée à partir du rapport entre la différence de fréquence (dF) du signal de différence de fréquence et la bande de fréquences. Un signal de libération (FS) est alors formé pour la transmission de données si cette valeur de distance est inférieure à une valeur limite (GW) préallouable. Ainsi, des dispositifs de lecture/écriture et des mémoires de données mobiles peuvent être installés à une faible distance les uns des autres sans que des influences parasites indésirables apparaissent entre ces dispositifs et ces mémoires. L'invention concerne en outre un dispositif de lecture/écriture ainsi qu'un système d'identification permettant la mise en oeuvre d'un tel procédé.
PCT/EP2003/014136 2002-12-20 2003-12-12 Procede de liberation d'une transmission de donnees entre un dispositif d'ecriture/lecture et au moins une memoire de donnees mobile WO2004059561A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003292235A AU2003292235A1 (en) 2002-12-20 2003-12-12 Method for enabling data transmission between a read/write device and at least one mobile data memory

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002161097 DE10261097A1 (de) 2002-12-20 2002-12-20 Verfahren zur Freigabe einer Datenübertragung zwischen einem Schreib-/Lesegerät und mindestens einem mobilen Datenspeicher, sowie Schreib-/Lesegerät und Identifikationssystem für ein derartiges Verfahren
DE10261097.5 2002-12-20

Publications (1)

Publication Number Publication Date
WO2004059561A1 true WO2004059561A1 (fr) 2004-07-15

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AU (1) AU2003292235A1 (fr)
DE (1) DE10261097A1 (fr)
WO (1) WO2004059561A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1936401A1 (fr) * 2006-12-22 2008-06-25 Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO Methode et système radar pour la transmission d'information

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1662421A1 (fr) * 2004-11-29 2006-05-31 Siemens Aktiengesellschaft Méthode de communication radio entre un lecteur et au moins un porteur de données mobile
US7321289B2 (en) * 2005-06-30 2008-01-22 Symbol Technologies, Inc. Systems and methods for reducing interference by modulating a reader transmittal signal within the transmission channel

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1043679A1 (fr) * 1999-04-07 2000-10-11 STMicroelectronics S.A. Lecteur avec des moyens pour déterminer la distance entre ce lecteur et un transpondeur
CA2267625A1 (fr) * 1999-04-14 2000-10-14 Jean-Louis Revol Dispositif contraignant a une reduction de distance au quasi-contact pour des transactions securisees
WO2001025060A2 (fr) * 1999-10-01 2001-04-12 Siemens Automotive Corporation Systeme de detection d'agression a relai avec communications protegees de commande de vehicule
DE19957536A1 (de) * 1999-11-30 2001-06-21 Siemens Ag Diebstahlschutzsystem für ein Kraftfahrzeug und Verfahren zum Betreiben eines Diebstahlschutzsystems
DE10012113A1 (de) * 2000-03-13 2001-10-04 Siemens Ag Verfahren und Vorrichtung zur Datenübertragung und/oder Abstandsmessung zwischen einer Basiseinheit und einer mobilen Schlüsseleinheit eines Zugangsberechtigungskontrollsystems, insbesondere für Kraftfahrzeuge
WO2003081516A1 (fr) * 2002-03-21 2003-10-02 Siemens Aktiengesellschaft Systeme d'identification conçu pour detecter une autorisation d'acces a un objet ou d'utilisation d'un objet, en particulier d'un vehicule automobile

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1043679A1 (fr) * 1999-04-07 2000-10-11 STMicroelectronics S.A. Lecteur avec des moyens pour déterminer la distance entre ce lecteur et un transpondeur
CA2267625A1 (fr) * 1999-04-14 2000-10-14 Jean-Louis Revol Dispositif contraignant a une reduction de distance au quasi-contact pour des transactions securisees
WO2001025060A2 (fr) * 1999-10-01 2001-04-12 Siemens Automotive Corporation Systeme de detection d'agression a relai avec communications protegees de commande de vehicule
DE19957536A1 (de) * 1999-11-30 2001-06-21 Siemens Ag Diebstahlschutzsystem für ein Kraftfahrzeug und Verfahren zum Betreiben eines Diebstahlschutzsystems
DE10012113A1 (de) * 2000-03-13 2001-10-04 Siemens Ag Verfahren und Vorrichtung zur Datenübertragung und/oder Abstandsmessung zwischen einer Basiseinheit und einer mobilen Schlüsseleinheit eines Zugangsberechtigungskontrollsystems, insbesondere für Kraftfahrzeuge
WO2003081516A1 (fr) * 2002-03-21 2003-10-02 Siemens Aktiengesellschaft Systeme d'identification conçu pour detecter une autorisation d'acces a un objet ou d'utilisation d'un objet, en particulier d'un vehicule automobile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1936401A1 (fr) * 2006-12-22 2008-06-25 Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO Methode et système radar pour la transmission d'information
WO2008079004A1 (fr) * 2006-12-22 2008-07-03 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Procédé et système radar pour transmettre des informations

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Publication number Publication date
DE10261097A1 (de) 2004-07-15
AU2003292235A1 (en) 2004-07-22

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