EP1002177A2 - Procede pour le fonctionnement d'une telecommande, et telecommande associee - Google Patents

Procede pour le fonctionnement d'une telecommande, et telecommande associee

Info

Publication number
EP1002177A2
EP1002177A2 EP98948731A EP98948731A EP1002177A2 EP 1002177 A2 EP1002177 A2 EP 1002177A2 EP 98948731 A EP98948731 A EP 98948731A EP 98948731 A EP98948731 A EP 98948731A EP 1002177 A2 EP1002177 A2 EP 1002177A2
Authority
EP
European Patent Office
Prior art keywords
signal
base station
remote control
signals
contact
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.)
Granted
Application number
EP98948731A
Other languages
German (de)
English (en)
Other versions
EP1002177B1 (fr
Inventor
Stefan Schmitz
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1002177A2 publication Critical patent/EP1002177A2/fr
Application granted granted Critical
Publication of EP1002177B1 publication Critical patent/EP1002177B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/16—Electric signal transmission systems in which transmission is by pulses
    • G08C19/28—Electric signal transmission systems in which transmission is by pulses using pulse code

Definitions

  • the invention is based on a method as described in German Patent Application, AZ: 196 45 769.6.
  • a remote control is then assigned to a base station arranged in a motor vehicle by the latter issuing a search signal, to which remote controls located in the range of the search signal respond by returning a contact signal at times that are characteristic of the remote controls.
  • the base station determines the remote controls present by evaluating the input times of the contact signal feedback. She selects one of them to carry out a challenge / response verification. Because the information about the remote controls present is not contained in the contact signal, but rather when it is sent back, the contact signal can be simply constructed and the entire detection process can be carried out very quickly. The speed of detection is only determined by the number of time slots provided for the individual remote controls. If, however, a very large number of remote assigned to operations, the process loses the advantage of its speed.
  • the object is achieved by a method having the features of the main claim and devices designed for carrying it out in accordance with the subclaims.
  • the method according to the invention allows, by assigning several remote controls to individual time slots, the assignment of a large number of remote controls to a base station while the assignment recognition speed remains high. The number of time slots can thus be kept small and the allocation recognition speed can be kept high.
  • An additional control signal with which the base station causes the remote controls to transmit their device codes, is advantageously used to differentiate between several remote controls responding in the same time slot.
  • the base station uses the intelligibility of the returned device codes particularly advantageously as identification information.
  • the remote controls are stimulated to emit randomly set contact signals, with the remote control that first clearly answers being selected. As a result, a remote control is clearly identified in just a few steps and correspondingly quickly if several remote controls assigned to the same time slot are within range of the base station.
  • FIG. 1 shows a block diagram of an assignment arrangement
  • FIG. 2 shows a flowchart to illustrate its operation
  • FIG. 3 shows the principle of time slot assignment
  • FIG. 4 shows the structure of a search signal.
  • the reference number 10 denotes a base station, which can be part of a device or an object or is permanently assigned to one.
  • the base station can be part of the access control device of a building or a motor vehicle.
  • the reference number 20 designates an actuating device, referred to below as remote control, which is functionally assigned to the base station 10 in a contactless manner via a signal transmission path 30.
  • the remote control 20 can be, for example
  • the base station 10 acts on the technical device, the part of which or which it is assigned, via active connections (not shown).
  • the core of the base station 10 is formed by a microprocessor 13, which in particular monitors and initiates the output of signals by the base station 10 and evaluates incoming signals. It is connected via a coding / decoding unit 12 to a transceiver 11 for delivering or receiving signals transmitted in a contactless manner via the signal transmission path 30.
  • the coding / decoding unit 12 serves to encrypt / decrypt the signals exchanged between the microprocessor 13 and the transceiver 11.
  • a memory 15 is assigned to the microprocessor 13.
  • the device code 17 uniquely identifies the associated device, ie the base station 10. It is assigned by the base station manufacturer and cannot be changed.
  • the serial number 16 is characteristic of mutually assigned base stations 10 and remote controls 20. The ones entered in the directory 18
  • Group numbers 28 distinguish the remote controls 20 assigned to a base station 10 with the same serial numbers, the respectively assigned device code 27, in conjunction with the cryptic key code 31, serves to verify a remote control 20 belonging to the group number Directory 18 also contains the links used in the verification of the two. In the directory 18, the device codes 27 of remote controls 20 which are no longer permitted and which have been lost or stolen are also stored.
  • the serial numbers 16 are determined by the manufacturer of the technical device to which the base station 10 or the remote controls 20 are assigned. When using the arrangement in motor vehicles, for example, the determination can be made by the vehicle manufacturer. The latter can also define the cryptic key code 31, by means of which the affiliation of a remote control 20 to the base station 10 is verified.
  • the remote control 20 has a transmitting / receiving device 21 corresponding to the transmitting / receiving device 11 on the base station side for receiving signals emitted by the base stadium 10 or for emitting contactlessly transmitted signals to the base station 10.
  • this is Transceiver 21 a co Dier- / decoding unit 22 for decrypting / encrypting coded signals.
  • Connected to the coding / decoding unit 22 is a microprocessor 24 which, in particular, evaluates the signals coming in via the transceiver 21, depending on the results
  • a memory unit 25 is assigned to the microprocessor 24. It contains a memory location for storing the serial number 16, a memory location for storing a device code 27, a memory location for storing a group number 28 and a memory location for storing a cryptic key code 31.
  • the meaning of the memory contents corresponds in each case the meaning of the similar memory contents in the memory 15 of the base station 10.
  • the serial number 16 is a code characteristic of the overall device consisting of the base station 10 and associated actuating elements 20 and is identical to the serial number contained in the memory 15 of the base station 10.
  • the group number 28 serves to differentiate from remote controls 20 having the same serial number. It is determined by the user when using the overall device.
  • the device code 27 is assigned by the manufacturer of the remote control 20 and uniquely identifies it.
  • the cryptic key code 31 is identical to the key code present in the base station 10 and serves to verify the membership of a base station 10. It is determined by the manufacturer of the technical device belonging to the base station 10.
  • a signal transmission path 30 for the transmission of non-contact signals between the remote control-side transceiver 21 and the base-side transceiver 11.
  • Reach signals originating from the base station-side transceiver 11 all remote controls 20 within their range are used at the same time. Infrared signals or high frequency signals are expediently used as signals.
  • a plurality of remote controls 20 can be assigned to a base station 10. All assigned remote controls 20 and base station 10 themselves have an identical serial number 16 in their memories 15, 25 and use an identical cryptic key code 31 for verification.
  • the individual remote controls 20 differ in their group numbers. They are usually simply assigned so that a remote control is clearly identified by group number 28. Certain group numbers can also be assigned to several remote controls 20 at the same time. Such remote controls 20 provided with the same group number 28 differ in their device code 27.
  • FIG. 2 The mode of operation of the device shown in FIG. 1 is explained below with reference to FIGS. 2 and 3.
  • the sequence steps in FIG. 2 are each preceded by a letter B or F, which indicates whether the associated sequence step takes place in the base station 10: B or in the remote control 20: F.
  • the assignment recognition process is - usually - triggered by a user actuating a mechanical, electrical or electro-optical trigger mechanism (not shown), step 100.
  • the trigger mechanism can consist, for example, of actuating the door handle.
  • the microprocessor 13 of the base station 10 initiates the transmission of a search signal by the transmitting / receiving device 11, step 102.
  • the search signal contains, as indicated in FIG. essentially a start frequency 35, preferably implemented as a start bit, and the serial number 16 stored in the memory 15. It is expediently unencrypted.
  • the search signal is transmitted by all remote controls 20 located within the range of the signal transmission path 30
  • Transceivers 21 received.
  • your microprocessors 24 check whether the serial number 16 transmitted with the search signal matches the serial number 16 stored in the memory 25 of the remote control 20 and serving as a reference signal.
  • the start bit 35 which is also transmitted, serves to synchronize the microprocessor 24 with the received search signal. If the microprocessor 24 determines a correspondence between the received serial number and the serial number present in the memory 25, it initiates the output of a response in the form of a contact signal, step 104.
  • a short signal of simple construction for example the group number of the respective remote control, serves as the contact signal 20 in bit-coded form. It is expedient, like the search signal, to be unencrypted.
  • the microprocessor 24 initiates the transmission of the search signal after a period of time, which is characteristic of the actuating element 20 and is determined by the group number, from the receipt of the search signal. It takes place in a time window with a predetermined length.
  • the transmission is dimensioned such that a reliable assignment of a contact signal to a time window is possible for both the remote control 20 and for the base station 10.
  • FIG. 3 illustrates the response behavior of the remote controls 20 to a search signal in a graphical representation. It denotes the abscissa a time axis t divided into 8 time windows F0, ..., F7, which begins with the arrival of the search signal in the remote controls 20. The ordinate indicates the group number 28 of the respective remote control 20.
  • a base station 10 has eight group numbers. assigned 0 to 7.
  • a remote control with the group numbers 0 or 2 and 3 remote controls with the group number 7 are present. They all respond to the search signal by sending out a contact signal in accordance with step 104.
  • the time at which the contact signal was sent that is, the order number of the associated time window, the group number of the respective remote control.
  • the remote control with group number 2 therefore sends out its contact signal after waiting time T2 in time window F2, remote controls with group number 6 send it after waiting time T6 in time window F6.
  • two offset contact signals appearing in the windows F2 and F6 are received at the transceiver 11 of the base station 10, which immediately indicate which remote controls 20, which are designated by their group numbers, are within the range of the signal transmission path 30.
  • the microprocessor 13 determines the remote controls 20 present, step 106.
  • Remote controls 20 present are noted by corresponding entries in the memory 15. If no remote control 20 is found, an abort signal is issued, step 108, with which the recognition attempt is ended.
  • the microprocessor 13 After determining the remote controls 20 present, the microprocessor 13 makes a selection, with which the assignment is then to be verified, step 112. First, it checks whether remote controls 20 clearly identified by group numbers assigned only once are present. If this is the case, he chooses one for the subsequent verification communication.
  • the basis for the selection can be, for example, a ranking of the remote controls 20, on the basis of which the remote controls are given different functions.
  • the selected remote control 20 subjects the base station 10 to an assignment correctness check. It is carried out using the known challenge / response method.
  • the base station 10 sends a random number generated for this purpose as a challenge to the remote control 20, step 130.
  • the microprocessor 13 uses a predefined algorithm to form the cryptographic key code 31 from the device code 28 of the relevant remote control 20 stored in the directory 18 Random number a target response signal.
  • the challenge signal sent to the remote control 20 is received by the transceiver 21 and transferred to the microprocessor 24. The latter derives a response signal from the received challenge signal in the same way as the microprocessor 13 of the base station 10 and sends it back to the base station 10, step 132.
  • Its microprocessor 13 compares the received response signal with the one received previously determined target response signal and outputs a release signal if they match, a blocking signal if they do not match.
  • a blocking signal is issued in particular when the device code 27 contained in the response signal belongs to a remote control 20 that has been blocked, for example after loss or theft.
  • the microprocessor 13 effects the output of an identification signal via the transceiver 11, step 114. It initiates the microprocessors 24 of the remote controls 20 present to respond by sending back the device code 27 present in the memories 25. All remote controls 20 answer at the same time, step 116.
  • the device code sent back to the transmission of a singling signal is then checked by the microprocessor 13 of the base station 10 to determine whether the signal received as a whole corresponds to the form of a device code and can be identified with one of the device codes stored in the memory 15. Step 118. If this is the case, only a single remote control 20 with a group number that has been assigned multiple times is present.
  • the microprocessor 13 then continues to perform simplified verification communication. For this purpose, he sends the remote control 20 a challenge signal consisting of a random number, step 134, and at the same time he generates a target response signal from the random number by linking it with the cryptic key code 31. In the same way, the remote control 20 operates in the meantime with the challenge signal sent to it. The resultant encrypted signal is sent back to the bass station 10, step 136. Its microprocessor 13 compares the received response signal with the previously determined target response signal and outputs a release signal if it matches, and a blocking signal if it does not match.
  • the microprocessor 13 initiates the transmission of a singling signal, step 120. It is received by the remote controls 20 and forwarded to their respective microprocessors 24. The isolation signal causes those to send a contact signal in a randomly selected time window that is not linked to the group number 28.
  • the microprocessors 24 of the remote controls 20 accordingly initiate the randomly controlled selection of a time window, step 122, after receiving an individualization signal. For this purpose, they link the device code 27 present in the memory 25, for example with a random number generated by the microprocessor or previously sent by base station 10. He then prepares the return of the contact signal for the randomly selected time window.
  • the microprocessor 13 of the base station 10 expects the input of the first contact signal, step 124. As soon as it has determined the input of the first contact signal, it no longer accepts further incoming contact signals. At the same time, he initiates the transmission of a control signal, step 126, which blocks the transmission of further prepared contact signals by the remote controls 20 in later time windows. The remote controls 20 that are hindered from transmitting no longer participate in the subsequent communication. Thereupon, the microprocessor 13 again sends an identification signal, step 114, to the remote controls 20 still involved in the communication. Those in turn respond by sending back their device code, step 116, which the base station-side microprocessor 13 in turn evaluates for unambiguous interpretability .
  • the microprocessor 13 continues with the execution of the assignment correctness check according to step 130. If there is no clear interpretability during the check in step 118, the microprocessor 13 repeats steps 114 to 126 until the check in step 128 results in a device code that can be clearly identified. If the microprocessor 13 determines, when running through the loop defined by steps 114 to 126, that no response contact signal is received in response to an identification signal, it terminates the association communication, step 138, and / or initiates further suitable follow-up measures.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Selective Calling Equipment (AREA)
  • Lock And Its Accessories (AREA)

Abstract

L'invention concerne un procédé pour associer une télécommande à une station de base. Cette station de base (10) délivre un signal de recherche que reçoit la télécommande (20), laquelle le compare avec un signal de référence et en cas de concordance délivre un signal de contact. Lors de la réception en retour de signaux de contact bien définis, la station de base (10) délivre alors un signal d'identification (114), à réception duquel la télécommande (20) renvoie à la station de base un signal de code (17) l'identifiant de manière univoque.
EP98948731A 1997-08-08 1998-08-05 Procede pour le fonctionnement d'une telecommande, et telecommande associee Expired - Lifetime EP1002177B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19734341 1997-08-08
DE19734341A DE19734341A1 (de) 1997-08-08 1997-08-08 Verfahren zum Betrieb einer Fernbedienung und Fernbedienung
PCT/DE1998/002253 WO1999008471A2 (fr) 1997-08-08 1998-08-05 Procede pour le fonctionnement d'une telecommande, et telecommande associee

Publications (2)

Publication Number Publication Date
EP1002177A2 true EP1002177A2 (fr) 2000-05-24
EP1002177B1 EP1002177B1 (fr) 2004-01-07

Family

ID=7838362

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98948731A Expired - Lifetime EP1002177B1 (fr) 1997-08-08 1998-08-05 Procede pour le fonctionnement d'une telecommande, et telecommande associee

Country Status (7)

Country Link
US (1) US6633227B1 (fr)
EP (1) EP1002177B1 (fr)
JP (1) JP2001513616A (fr)
AU (1) AU732966B2 (fr)
DE (2) DE19734341A1 (fr)
ES (1) ES2214733T3 (fr)
WO (1) WO1999008471A2 (fr)

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DE19941350A1 (de) * 1999-03-29 2000-10-05 Mannesmann Vdo Ag Vorrichtung und Verfahren zur Freigabe einer Sicherheitseinrichtung, insbesondere einer Zuganseinrichtung für ein Kraftfahrzeug
EP1041224A3 (fr) 1999-03-29 2004-03-31 Siemens Aktiengesellschaft Dispositif et procédé de libération d'un système de sécurité, en particulier d'un système d'accès pour véhicule automobile
JP4280949B2 (ja) * 1999-07-30 2009-06-17 ソニー株式会社 情報受信装置、遠隔操作システム、情報受信装置の番組ガイド情報提供方法及び遠隔操作システムの遠隔操作方法
FR2804562B1 (fr) * 2000-01-27 2005-03-18 Valeo Securite Habitacle Installation d'acces a distance a des fonctions differentes dans un vehicule automobile
KR20030017607A (ko) * 2001-05-04 2003-03-03 코닌클리즈케 필립스 일렉트로닉스 엔.브이. 국 식별 신호 생성 수단을 포함하는 통신국을 구비하는트랜스폰더 시스템
JP3546041B2 (ja) * 2002-02-15 2004-07-21 日産自動車株式会社 車載機器通信制御装置
JP3577482B2 (ja) * 2002-02-15 2004-10-13 日産自動車株式会社 車載機器通信制御装置
JP4275623B2 (ja) * 2002-08-28 2009-06-10 エヌエックスピー ビー ヴィ 通信局によるトランスポンダインベントリ方法
DE10250676A1 (de) * 2002-10-31 2004-05-13 Hella Kg Hueck & Co. Verfahren zur Vermeidung von Kollisionen bei der Anmeldung zumindest einer ersten Vorrichtung an einer zweiten Vorrichtung, Anordnung aus zumindest einer ersten Vorrichtung und einer zweiten Vorrichtung und eine erste Vorrichtung
JP4424922B2 (ja) * 2003-04-02 2010-03-03 株式会社コナミデジタルエンタテインメント 遠隔操作玩具、それに用いる無線機及び駆動機器、並びに遠隔操作玩具における識別コード設定方法
US8269612B2 (en) 2008-07-10 2012-09-18 Black & Decker Inc. Communication protocol for remotely controlled laser devices
KR101268542B1 (ko) * 2009-12-21 2013-05-28 한국전자통신연구원 다수의 ｒｆｉｄ 태그를 인식하기 위한 시스템 및 방법
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Also Published As

Publication number Publication date
WO1999008471A2 (fr) 1999-02-18
DE59810558D1 (de) 2004-02-12
ES2214733T3 (es) 2004-09-16
DE19734341A1 (de) 1999-02-11
JP2001513616A (ja) 2001-09-04
AU9529598A (en) 1999-03-01
AU732966B2 (en) 2001-05-03
WO1999008471A3 (fr) 1999-04-29
US6633227B1 (en) 2003-10-14
EP1002177B1 (fr) 2004-01-07

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