EP2124209B1 - Procédé destiné à l'augmentation du rayon d'action de systèmes d'accès radio - Google Patents

Procédé destiné à l'augmentation du rayon d'action de systèmes d'accès radio Download PDF

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Publication number
EP2124209B1
EP2124209B1 EP08103759A EP08103759A EP2124209B1 EP 2124209 B1 EP2124209 B1 EP 2124209B1 EP 08103759 A EP08103759 A EP 08103759A EP 08103759 A EP08103759 A EP 08103759A EP 2124209 B1 EP2124209 B1 EP 2124209B1
Authority
EP
European Patent Office
Prior art keywords
signals
rejected
signal
radio access
range
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.)
Not-in-force
Application number
EP08103759A
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German (de)
English (en)
Other versions
EP2124209A1 (fr
Inventor
Jörg Schrape
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.)
Hella GmbH and Co KGaA
Original Assignee
Hella KGaA Huek and Co
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 Hella KGaA Huek and Co filed Critical Hella KGaA Huek and Co
Priority to AT08103759T priority Critical patent/ATE519191T1/de
Priority to EP08103759A priority patent/EP2124209B1/fr
Publication of EP2124209A1 publication Critical patent/EP2124209A1/fr
Application granted granted Critical
Publication of EP2124209B1 publication Critical patent/EP2124209B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C25/00—Arrangements for preventing or correcting errors; Monitoring arrangements
    • G08C25/04—Arrangements for preventing or correcting errors; Monitoring arrangements by recording transmitted signals

Definitions

  • the invention relates to a method for increasing the range of radio access systems according to the preamble of claim 1.
  • Such radio access systems are used in particular in motor vehicles to trigger various functions such as opening / closing, locating the vehicle and / or auxiliary heating via a built-in key part in a remote control.
  • signals which each comprise a specific data stream are transmitted in certain radio bands, e.g. in the ISM bands 315 MHz, 433 MHz, 868 MHz or 915 MHz. At least some of the functions require a relatively long range.
  • a vehicle having at least two radio-based systems using a common vehicle-mounted receiver is known.
  • a bandwidth of the receiver is automatically dependent on vehicle condition data adjustable. This should ensure a different range depending on a function to be triggered.
  • the object of the invention is to provide a method for radio access systems that allows greater ranges with little hardware overhead, even for larger data streams.
  • Discarded signals are buffered, and after every odd number of discarded signals, a bitwise majority decision followed by validation is performed. Here, the odd number is greater than two. Using the cached discarded signals and the bitwise majority decision from the signals corrected signals are determined. These are more likely to contain correct data than any single signal, so that the desired function is more likely to be performed correctly.
  • the bitwise majority decision is made as follows: For each bit of the discarded signals, the corresponding bits are compared. If a value of a majority of corresponding bits - eg at least three bits for five signals - is identical, this value is used as the corrected value and used in the signal to be newly formed. In this simple way, erroneous and therefore discarded signals are quickly and safely corrected to valid signals; the The probability that corresponding bits are mostly different is low. This correction will be performed as long after the receipt of further signals (three points in the FIG. 1 ) until a valid signal has been generated or received.
  • the majority decision is inserted in the normal process of receiving the data. As a result, the normal processes remain unaffected, so that no changes must be made here.
  • the discarded signals are buffered until a valid signal has been generated or another termination criterion is filled. Therefore, little storage capacity is required.
  • the start 1 is triggered by the operation of a corresponding button on a transmitting part.
  • the transmitting section transmits a modulated and coded signal consisting of an associated predetermined number of bits.
  • the signal is received by a receiving part, which is eg arranged in a motor vehicle, 2 and tested for validity 3. If the received signal 2 is valid Y, the corresponding function 5 is triggered. If the received signal 2 is invalid N, it is discarded and buffered. A second signal is received 2 and checked for validity 3. If the second received signal 2 is also invalid N, it is buffered. A third signal 2 is received and checked for validity 3. If the third received signal 2 is again invalid N, it is buffered.
  • a bitwise majority decision 4 is performed and a corrected signal is calculated.
  • the corrected signal is checked for validity 3; if it is valid, the corresponding function 5 is triggered and the stored signals are deleted; if it is invalid, receiving 2 will be repeated, checking validity 3, discard, caching and bitwise majority decision 4 on each odd number of received signals 2 until a valid signal is received or calculated.
  • the allowable bit error rate at the receiver output may increase from about 0.001 to 0.05 by the bitwise majority decision on five received signals. This increases the sensitivity of a known receiver by about 3 dB. This leads to a higher range in the system remote control - receiver in the vehicle.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lock And Its Accessories (AREA)
  • Selective Calling Equipment (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Mobile Radio Communication Systems (AREA)

Claims (3)

  1. Procédure pour augmenter la portée des systèmes de contrôle d'accès radio, les données sous forme de signaux modulés dans une gamme des hautes fréquences étant échangées entre une station de base et une télécommande,
    et la validité des signaux étant contrôlée, les signaux étant rejetés le cas échéant,
    caractérisée en ce que des signaux rejetés sont mémorisés temporairement et
    qu'après chaque nombre impair de signaux rejetés un vote à la majorité est réalisé bit par bit suivi d'un contrôle de validité jusqu'un signal valide est généré ou reçu.
  2. Procédure selon la revendication 1, caractérisée en ce que le vote à la majorité est intégré au déroulement normal de la réception des données.
  3. Procédure selon la revendication 1 ou 2, caractérisée en ce que les signaux rejetés sont mémorisés temporairement jusqu'un signal valide est généré.
EP08103759A 2008-04-29 2008-04-29 Procédé destiné à l'augmentation du rayon d'action de systèmes d'accès radio Not-in-force EP2124209B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT08103759T ATE519191T1 (de) 2008-04-29 2008-04-29 Verfahren zur erhöhung der reichweite von funkzugangssystemen
EP08103759A EP2124209B1 (fr) 2008-04-29 2008-04-29 Procédé destiné à l'augmentation du rayon d'action de systèmes d'accès radio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08103759A EP2124209B1 (fr) 2008-04-29 2008-04-29 Procédé destiné à l'augmentation du rayon d'action de systèmes d'accès radio

Publications (2)

Publication Number Publication Date
EP2124209A1 EP2124209A1 (fr) 2009-11-25
EP2124209B1 true EP2124209B1 (fr) 2011-08-03

Family

ID=41128283

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08103759A Not-in-force EP2124209B1 (fr) 2008-04-29 2008-04-29 Procédé destiné à l'augmentation du rayon d'action de systèmes d'accès radio

Country Status (2)

Country Link
EP (1) EP2124209B1 (fr)
AT (1) ATE519191T1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2754090B1 (fr) * 1996-09-27 1998-12-18 Valeo Electronique Perfectionnements aux telecommandes rf a double portee pour vehicule automobile
US6097520A (en) * 1997-06-30 2000-08-01 Microsoft Corporation Remote control receiver and method of operation
DE102006009899A1 (de) 2006-03-03 2007-09-06 Hella Kgaa Hueck & Co. Fahrzeug mit zwei oder mehr funkbasierten Systemen

Also Published As

Publication number Publication date
EP2124209A1 (fr) 2009-11-25
ATE519191T1 (de) 2011-08-15

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