EP1891605A1 - Communication method between a motor vehicle and a diagnostic unit - Google Patents

Communication method between a motor vehicle and a diagnostic unit

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Publication number
EP1891605A1
EP1891605A1 EP05750542A EP05750542A EP1891605A1 EP 1891605 A1 EP1891605 A1 EP 1891605A1 EP 05750542 A EP05750542 A EP 05750542A EP 05750542 A EP05750542 A EP 05750542A EP 1891605 A1 EP1891605 A1 EP 1891605A1
Authority
EP
European Patent Office
Prior art keywords
diagnostic unit
motor vehicle
vehicle
authorization
communication
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
EP05750542A
Other languages
German (de)
French (fr)
Other versions
EP1891605B1 (en
Inventor
Franz Gumpinger
Marc Torlo
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1891605A1 publication Critical patent/EP1891605A1/en
Application granted granted Critical
Publication of EP1891605B1 publication Critical patent/EP1891605B1/en
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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/008—Registering or indicating the working of vehicles communicating information to a remotely located station
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C2205/00—Indexing scheme relating to group G07C5/00
    • G07C2205/02—Indexing scheme relating to group G07C5/00 using a vehicle scan tool

Definitions

  • the present invention relates to a method for communication between a motor vehicle and a diagnostic unit, in which a wireless communication connection between the motor vehicle and the diagnostic unit is set up after an authorization of the diagnostic unit has been checked.
  • the present invention relates to a diagnostic unit for carrying out such a method.
  • a wired interface For communication between a motor vehicle and a diagnostic unit for the purpose of diagnosis and / or programming or access to customer, adaptation and / or vehicle data, a wired interface is commonly used in the prior art.
  • the diagnosis, programming and data communication to the vehicle is possible in such a case only after manual connection. Consequently, data exchange is only possible at selected process points, especially in the service environment.
  • wireless interfaces for communication between a motor vehicle and a diagnostic unit are known.
  • these are - depending on the embodiment - afflicted with various disadvantages.
  • known wireless interfaces for communication between a motor vehicle and a diagnostic unit often do not provide for a check of authorization of the diagnostic unit. If a check of authorization of the diagnostic unit is provided, it is disadvantageously additional device technical effort and / or program technical effort and / or communication effort to operate.
  • a first object of the present invention is to provide a simple method of communication between a motor vehicle and a diagnostic unit, in which a wireless communication link between the motor vehicle and the diagnostic unit is established after an authorization of the diagnostic unit has been verified.
  • a second object of the present invention is to provide a diagnostic unit which is suitable for carrying out such a method.
  • the first object is achieved according to the invention by a method in which the diagnostic unit is connected to a vehicle key assigned to the motor vehicle and the authorization of the diagnostic unit is checked on the basis of authorization data stored in the vehicle key.
  • the second object is achieved by a diagnostic unit having means for connection to a vehicle key associated with the motor vehicle, which is suitable for receiving authorization data from the vehicle key which is suitable for indirect or direct wireless communication with the motor vehicle and which is suitable to prove the authorization data received an authorization with respect to the motor vehicle.
  • a erfindungsgemäafi.es method causes only a very low device technology see and program technical effort and still allows an effective review of the entitlement of the diagnostic unit for communication with the motor vehicle.
  • the diagnostic unit has its own means for direct wireless communication with the motor vehicle and only authorization data are transmitted from the vehicle key to the diagnostic unit.
  • the diagnostic unit for wireless communication with the motor vehicle depends on the communication technology selected.
  • Various wireless technologies can be used here (WLAN, Bluetooth, ).
  • the diagnostic unit may include a connected WLAN router.
  • the diagnostic unit preferably even has suitable integrated communication means, for example an integrated WLAN interface.
  • the motor vehicle in this variant of the invention must also have corresponding communication means, for example a WLAN gateway.
  • the motor vehicle in a conventional manner temporarily, for example, only in the workshop area, are equipped with appropriate communication means.
  • the motor vehicle must be located close enough to the communication means of the diagnostic unit.
  • the diagnostic unit has suitable means for communicating with the motor vehicle, also directly, via the same radio technology, also communicates with the vehicle key during locking and unlocking with the motor vehicle.
  • Such an embodiment has the advantage that no additional equipment, such as a WLAN gateway, is to be provided on the motor vehicle. Instead, the communication means already present for the electric locking system on the motor vehicle can be used.
  • the transmission of the authorization data from the vehicle key to the diagnosis unit can take place, for example, via a communication connection between a vehicle key reading device, in which the vehicle key is inserted, and the diagnosis unit.
  • the communication connection between the vehicle key reader and the diagnostic unit is preferably carried out by wire.
  • the authorization data stored in the vehicle key are optionally processed, for example encrypted, for transmission to the diagnostic unit.
  • further processing, for example decryption, of the transmitted data may be provided to the diagnostic unit.
  • the diagnostic unit On the basis of the received authorization data, the diagnostic unit with respect to the motor vehicle according to their authorization for communication with the motor vehicle. For example, based on the received authorization data, a so-called session key for an encrypted transmission can be generated.
  • the vehicle key according to this variant of the invention does not necessarily have to remain in the vehicle key reading device.
  • the communication of the diagnostic unit with the motor vehicle via the vehicle key thus communicates indirectly with the motor vehicle.
  • the diagnostic unit in this case need not have its own means for wireless communication with the motor vehicle.
  • the - typi- schute carried out as a radio interface - wireless communication connection used, which - for example, for the unlocking of the motor vehicle - is already provided between the vehicle key and the vehicle.
  • the diagnostic unit for ' schba- ren wireless communication with the motor vehicle is connected to a car key writing / reading device, in which the vehicle key is inserted.
  • the diagnostic unit only has to be suitable for connection of such a vehicle key writing / reading device and for indirect communication with the motor vehicle via a vehicle key inserted in the vehicle key writing / reading device.
  • the vehicle key together with the vehicle key writing / reading device effectively acts as a gateway between the motor vehicle and the diagnostic unit.
  • the authorization of the vehicle key is checked in a manner known per se on the basis of the authorization data stored therein. The authorization data need not be transmitted to the diagnostic unit.
  • the motor vehicle must be sufficiently close to the vehicle key inserted in the vehicle key writing / reading device.
  • a communication method according to the invention is that it is not associated with any provider costs. Otherwise, the communication according to the present invention is independent of a provider, a mobile network and / or other public or semi-public communication networks.
  • Fig. 1 shows a preferred embodiment of an apparatus for performing a method according to the invention of the first variant
  • Fig. 2 shows a preferred embodiment of an apparatus for carrying out a method according to the invention of the second variant.
  • a communication connection for exchanging diagnosis-relevant data is to be set up.
  • Fig. 1 shows a preferred embodiment of an apparatus for performing a method according to the invention of the first variant.
  • the diagnostic unit 1 is connected to a WLAN router 5 for wireless communication with the motor vehicle 2.
  • the motor vehicle 2 has a - not specifically illustrated - WLAN gateway, which is connected to a diagnostic interface of the motor vehicle 2.
  • the WLAN router 5 and the WLAN gateway of the motor vehicle 2 allow a WLAN communication between the diagnostic unit 1 and the motor vehicle 2 from a technical point of view.
  • the establishment of communication connections via this WLAN interface is linked to the checking of an authorization of the diagnostic unit 1 ,
  • a vehicle key reader 3 is connected to the diagnostic tester 1 by way of a wired connection, in which a vehicle key 4 assigned to the motor vehicle 2 can be inserted.
  • FIG. 2 shows a preferred embodiment of a device for carrying out a method according to the invention of the second variant.
  • the diagnostic unit 1 ' is connected for wireless communication with the motor vehicle 2' to a vehicle key writing / reading device 3 '. In this vehicle key writing / reading device 3 ', a motor vehicle 2' associated vehicle key 4 'is inserted.
  • a radio interface Between the vehicle key 4 'and the motor vehicle 2' is provided - for example, for the unlocking of the motor vehicle - a radio interface.
  • This radio interface is used in the present case for communication of DiagnoseeinheifT with the motor vehicle 2 '.
  • the vehicle-side part of the radio interface is designed for this purpose in such a way and connected to a diagnostic interface of the motor vehicle 2 'that an exchange of diagnostic-relevant data via the radio interface is possible.
  • the vehicle key 4 'and the vehicle key writing / reading device 3' function together as a gateway between the motor vehicle 2 'and the diagnosis unit V.
  • the authorization of the vehicle is established via a challenge-response method Vehicle key 4 'checked on the basis of the authorization data stored in this.
  • a successfully checked authorization of the vehicle key 4 ' is evaluated as the authorization of the diagnostic unit 1' for establishing a communication connection with the motor vehicle 2 '.

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

Abstract

Disclosed is a communication method between a motor vehicle and a diagnostic unit, in which a wireless communication link is established between the motor vehicle and the diagnostic unit once an authorization of the diagnostic unit has been verified. According to the inventive method, the diagnostic unit is connected to a vehicle key allocated to the motor vehicle, and the authorization of the diagnostic unit is verified based on authorization data stored in the vehicle key. Also disclosed is a diagnostic unit for carrying out such a method. Said diagnostic unit comprises means to be connected to a vehicle key assigned to the motor vehicle while being suitable for receiving authorization data from the vehicle key, indirectly or directly communicating with the motor vehicle in a wireless manner, and detecting an authorization relative to the motor vehicle based on the received authorization data.

Description

Verfahren zur Kommunikation zwischen einem Kraftfahrzeug und einer DiagnoseeinheitMethod for communication between a motor vehicle and a diagnostic unit
Die vorliegende Erfindung betrifft ein Verfahren zur Kommunikation zwischen einem Kraftfahrzeug und einer Diagnoseeinheit, bei welchem eine drahtlose Kommunikati- onsverbindung zwischen dem Kraftfahrzeug und der Diagnoseeinheit aufgebaut wird, nachdem eine Berechtigung der Diagnoseeinheit überprüft worden ist.The present invention relates to a method for communication between a motor vehicle and a diagnostic unit, in which a wireless communication connection between the motor vehicle and the diagnostic unit is set up after an authorization of the diagnostic unit has been checked.
Ferner betrifft die vorliegende Erfindung eine Diagnoseeinheit zur Durchführung eines solchen Verfahrens.Furthermore, the present invention relates to a diagnostic unit for carrying out such a method.
Zur Kommunikation zwischen einem Kraftfahrzeug und einer Diagnoseeinheit zum Zweck der Diagnose und/oder Programmierung oder zum Zugriff auf Kunden-, Adaptions- und/oder Fahrzeugdaten wird gemäß dem Stand der Technik üblicherweise eine drahtgebundene Schnittstelle verwendet. Die Diagnose-, Programmier- und Datenkommunikation zum Fahrzeug ist in einem solchen Fall erst nach manuellem Anschließen möglich. Folglich ist insbesondere im Serviceumfeld der Datenaus- tausch nur an ausgewählten Prozesspunkten möglich.For communication between a motor vehicle and a diagnostic unit for the purpose of diagnosis and / or programming or access to customer, adaptation and / or vehicle data, a wired interface is commonly used in the prior art. The diagnosis, programming and data communication to the vehicle is possible in such a case only after manual connection. Consequently, data exchange is only possible at selected process points, especially in the service environment.
Als Alternative zu drahtgebundenen Schnittstelle sind drahtlose Schnittstellen für die Kommunikation zwischen einem Kraftfahrzeug und einer Diagnoseeinheit bekannt. Diese sind jedoch - je nach Ausführungsform - mit verschiedenen Nachteilen behaftet.As an alternative to a wired interface, wireless interfaces for communication between a motor vehicle and a diagnostic unit are known. However, these are - depending on the embodiment - afflicted with various disadvantages.
Beispielsweise sind Telekommunikationszugänge auf Mobilfunkbasis heute in der Regel nicht bei allen Kraftfahrzeugen verfügbar und verursachen darüber hinaus weitere Kosten durch Provider-Gebühren. Zudem sind heutige Telefonschnittstellen weltweit nicht einheitlich. Um alle Varianten und lokalen Unterschiede zu berücksichtigen, wäre ein erheblicher technischer und finanzieller Aufwand zu betreiben.For example, telecommunications access based on mobile phones are not generally available today in all motor vehicles and also cause further costs through provider fees. In addition, today's telephone interfaces are not uniform worldwide. To consider all variants and local differences, a considerable technical and financial effort would be required.
Bekannte drahtlose Schnittstellen zur Kommunikation zwischen einem Kraftfahrzeug und einer Diagnoseeinheit sehen zudem oft keine Prüfung einer Berechtigung der Diagnoseeinheit vor. Sofern eine Prüfung einer Berechtigung der Diagnoseeinheit vorgesehen ist, ist hierzu nachteiligerweise zusätzlicher gerätetechnischer Aufwand und/oder programmtechnischer Aufwand und/oder Kommunikationsaufwand zu betreiben.In addition, known wireless interfaces for communication between a motor vehicle and a diagnostic unit often do not provide for a check of authorization of the diagnostic unit. If a check of authorization of the diagnostic unit is provided, it is disadvantageously additional device technical effort and / or program technical effort and / or communication effort to operate.
Eine erste Aufgabe der vorliegenden Erfindung ist es, ein einfaches Verfahren zur Kommunikation zwischen einem Kraftfahrzeug und einer Diagnoseeinheit zu schaffen, bei welchem eine drahtlose Kommunikationsverbindung zwischen dem Kraftfahrzeug und der Diagnoseeinheit aufgebaut wird, nachdem eine Berechtigung der Diagnoseeinheit überprüft worden ist.A first object of the present invention is to provide a simple method of communication between a motor vehicle and a diagnostic unit, in which a wireless communication link between the motor vehicle and the diagnostic unit is established after an authorization of the diagnostic unit has been verified.
Eine zweite Aufgabe der vorliegenden Erfindung ist es, eine Diagnoseeinheit zu schaffen, welche zur Durchführung eines solchen Verfahrens geeignet ist.A second object of the present invention is to provide a diagnostic unit which is suitable for carrying out such a method.
Gelöst wird die erstgenannte Aufgabe erfindungsgemäß durch ein Verfahren, bei welchem die Diagnoseeinheit mit einem dem Kraftfahrzeug zugeordneten Fahrzeugschlüssel verbunden wird und die Berechtigung der Diagnoseeinheit anhand von in dem Fahrzeugschlüssel gespeicherten Berechtigungsdaten überprüft wird.The first object is achieved according to the invention by a method in which the diagnostic unit is connected to a vehicle key assigned to the motor vehicle and the authorization of the diagnostic unit is checked on the basis of authorization data stored in the vehicle key.
Die zweitgenannte Aufgabe wird gelöst durch eine Diagnoseeinheit, welche Mittel zur Verbindung mit einem dem Kraftfahrzeug zugeordneten Fahrzeugschlüssel aufweist, welche geeignet ist, Berechtigungsdaten von dem Fahrzeugschlüssel zu empfangen, welche zur mittelbaren oder unmittelbaren drahtlosen Kommunikation mit dem Kraftfahrzeug geeignet ist und welche geeignet ist, anhand der empfangenen Berechtigungsdaten eine Berechtigung gegenüber dem Kraftfahrzeug nachzuweisen.The second object is achieved by a diagnostic unit having means for connection to a vehicle key associated with the motor vehicle, which is suitable for receiving authorization data from the vehicle key which is suitable for indirect or direct wireless communication with the motor vehicle and which is suitable to prove the authorization data received an authorization with respect to the motor vehicle.
In heutigen Kraftfahrzeugen werden zunehmend elektronische Schließsysteme eingesetzt, welche auch per drahtloser Kommunikation das Öffnen und Schließen ei- nes Fahrzeuges ermöglichen. Zur Absicherung der Kommunikation zwischen Fahrzeugschlüssel und Fahrzeug wird in der Regel ein bidirektionaler Datenaustausch durchgeführt. Im Fahrzeugschlüssel sind hierzu zur Überprüfung seiner Berechtigung, beispielsweise zum Entriegeln des Fahrzeugs, Berechtigungsdaten gespei- chert. Der Erfindung liegt der Gedanke zu Grunde, diese bereits vorhandene Grundlage zur Überprüfung einer Berechtigung nun zur Lösung einer anderen, nämlich der vorliegenden, Aufgabe zu nutzen.In today's motor vehicles, electronic locking systems are increasingly being used, which also enable the opening and closing of a vehicle by means of wireless communication. To secure the communication between the vehicle key and the vehicle, a bidirectional data exchange is usually carried out. In the vehicle key, authorization data, for example for unlocking the vehicle, are stored in order to check its authorization. chert. The invention is based on the idea to use this already existing basis for checking an authorization now for the solution of another, namely the present, task.
Ein erfindungsgemafi.es Verfahren verursacht einen nur sehr geringen gerätetechni- sehen und programmtechnischen Aufwand und erlaubt dennoch eine wirkungsvolle Überprüfung der Berechtigung der Diagnoseeinheit zur Kommunikation mit dem Kraftfahrzeug.A erfindungsgemäafi.es method causes only a very low device technology see and program technical effort and still allows an effective review of the entitlement of the diagnostic unit for communication with the motor vehicle.
Gemäß einer ersten bevorzugten Variante der vorliegenden Erfindung verfügt die Diagnoseeinheit über eigene Mittel zur unmittelbaren drahtlosen Kommunikation mit dem Kraftfahrzeug und es werden lediglich Berechtigungsdaten von dem Fahrzeugschlüssel an die Diagnoseeinheit übertragen.According to a first preferred variant of the present invention, the diagnostic unit has its own means for direct wireless communication with the motor vehicle and only authorization data are transmitted from the vehicle key to the diagnostic unit.
Welche Kommunikationsmittel seitens der Diagnoseeinheit zur drahtlosen Kommunikation mit dem Kraftfahrzeug vorzusehen sind, ist abhängig von der gewählten Kommunikationstechnologie. Hier sind verschiedenste drahtlose Technologien an- wendbar (WLAN, Bluetooth, ...). Beispielsweise kann die Diagnoseeinheit einen angeschlossenen WLAN-Router umfassen. Vorzugsweise weist die Diagnoseeinheit sogar geeignete integrierte Kommunikationsmittel auf, beispielsweise eine integrierte WLAN-Schnittstelle.Which communication means are to be provided by the diagnostic unit for wireless communication with the motor vehicle depends on the communication technology selected. Various wireless technologies can be used here (WLAN, Bluetooth, ...). For example, the diagnostic unit may include a connected WLAN router. The diagnostic unit preferably even has suitable integrated communication means, for example an integrated WLAN interface.
Für die meisten möglichen Kommunikationstechnologien muss das Kraftfahrzeug bei dieser Variante der Erfindung ebenfalls über entsprechende Kommunikationsmittel, beispielsweise ein WLAN-Gateway, verfügen. Alternativ kann das Kraftfahrzeug in an sich bekannter Art und Weise temporär, beispielsweise nur im Werkstattbereich, mit entsprechenden Kommunikationsmitteln ausgerüstet werden.' Zudem muss sich das Kraftfahrzeug in ausreichender Nähe zu den Kommunikationsmitteln der Diagnoseeinheit befinden.For most possible communication technologies, the motor vehicle in this variant of the invention must also have corresponding communication means, for example a WLAN gateway. Alternatively, the motor vehicle in a conventional manner temporarily, for example, only in the workshop area, are equipped with appropriate communication means. 'In addition, the motor vehicle must be located close enough to the communication means of the diagnostic unit.
Gemäß einer besonders bevorzugten Ausführungsform der ersten Variante der Erfindung verfügt die Diagnoseeinheit über geeignete Mittel, um mit dem Kraftfahrzeug, ebenfalls unmittelbar, über die gleiche Funktechnologie zu kommunizieren, über die auch der Fahrzeugschlüssel beim Ver- und Entriegeln mit dem Kraftfahrzeug kommuniziert. Eine solche Ausführungsform birgt den Vorteil, dass am Kraftfahrzeug keine zusätzlichen Gerätschaften, etwa ein WLAN-Gateway vorzusehen ist. Es können stattdessen die ohnehin für das elektrische Schließsystem am Kraft- fahrzeug vorhandenen Kommunikationsmittel verwendet werden.According to a particularly preferred embodiment of the first variant of the invention, the diagnostic unit has suitable means for communicating with the motor vehicle, also directly, via the same radio technology, also communicates with the vehicle key during locking and unlocking with the motor vehicle. Such an embodiment has the advantage that no additional equipment, such as a WLAN gateway, is to be provided on the motor vehicle. Instead, the communication means already present for the electric locking system on the motor vehicle can be used.
Die Übertragung der Berechtigungsdaten von dem Fahrzeugschlüssel an die Diagnoseeinheit kann beispielsweise über eine Kommunikationsverbindung zwischen einem Fahrzeugschlüssellesegerät, in welches der Fahrzeugschlüssel eingelegt wird, und der Diagnoseeinheit erfolgen. Die Kommunikationsverbindung zwischen dem Fahrzeugschlüssellesegerät und der Diagnoseeinheit ist vorzugsweise drahtgebunden ausgeführt.The transmission of the authorization data from the vehicle key to the diagnosis unit can take place, for example, via a communication connection between a vehicle key reading device, in which the vehicle key is inserted, and the diagnosis unit. The communication connection between the vehicle key reader and the diagnostic unit is preferably carried out by wire.
Die in dem Fahrzeugschlüssel gespeicherten Berechtigungsdaten werden zur Übertragung an die Diagnoseeinheit gegebenenfalls verarbeitet, beispielsweise verschlüsselt. Je nach Ausführungsform ist bei der Diagnoseeinheit gegebenenfalls eine weitere Verarbeitung, beispielsweise Entschlüsselung, der übertragenen Daten vorzusehen. Anhand der empfangenen Berechtigungsdaten weist die Diagnoseeinheit gegenüber dem Kraftfahrzeug ihre Berechtigung zur Kommunikation mit dem Kraftfahrzeug nach. Beispielsweise kann auf Basis der empfangenen Berechtigungsdaten ein so genannter Session Key für eine verschlüsselte Übertragung ge- neriert werden.The authorization data stored in the vehicle key are optionally processed, for example encrypted, for transmission to the diagnostic unit. Depending on the embodiment, further processing, for example decryption, of the transmitted data may be provided to the diagnostic unit. On the basis of the received authorization data, the diagnostic unit with respect to the motor vehicle according to their authorization for communication with the motor vehicle. For example, based on the received authorization data, a so-called session key for an encrypted transmission can be generated.
Nach dem erfolgreichen Aufbau einer Kommunikationsverbindung zwischen Kraftfahrzeug und Diagnoseeinheit muss der Fahrzeugschlüssel gemäß dieser Variante der Erfindung nicht notwendigerweise in dem Fahrzeugschlüssellesegerät verbleiben.After the successful establishment of a communication connection between the motor vehicle and the diagnostic unit, the vehicle key according to this variant of the invention does not necessarily have to remain in the vehicle key reading device.
Gemäß einer zweiten bevorzugten Variante der vorliegenden Erfindung erfolgt die Kommunikation der Diagnoseeinheit mit dem Kraftfahrzeug über den Fahrzeugschlüssel. Die Diagnoseeinheit kommuniziert also mittelbar mit dem Kraftfahrzeug. Die Diagnoseeinheit muss in diesem Fall über keine eigenen Mittel zur drahtlosen Kommunikation mit dem Kraftfahrzeug verfügen. Gemäß dieser Variante der Erfin- düng wird zur Kommunikation der Diagnoseeinheit mit dem Kraftfahrzeug die - typi- scherweise als Funkschnittstelle ausgeführte - drahtlose Kommunikationsverbindung genutzt, welche - beispielsweise für die Entriegelung des Kraftfahrzeugs - ohnehin zwischen Fahrzeugschlüssel und Fahrzeug vorgesehen ist.According to a second preferred variant of the present invention, the communication of the diagnostic unit with the motor vehicle via the vehicle key. The diagnostic unit thus communicates indirectly with the motor vehicle. The diagnostic unit in this case need not have its own means for wireless communication with the motor vehicle. According to this variant of the invention, for the communication of the diagnostic unit with the motor vehicle, the - typi- scherweise carried out as a radio interface - wireless communication connection used, which - for example, for the unlocking of the motor vehicle - is already provided between the vehicle key and the vehicle.
Gemäß dieser zweiten Variante der Erfindung wird die Diagnoseeinheit zur'mittelba- ren drahtlosen Kommunikation mit dem Kraftfahrzeug mit einem Fahrzeugschlüs- selschreib-/lesegerät verbunden, in welches der Fahrzeugschlüssel eingelegt wird.According to this second variant of the invention, the diagnostic unit for ' mittelba- ren wireless communication with the motor vehicle is connected to a car key writing / reading device, in which the vehicle key is inserted.
Die Diagnoseeinheit muss lediglich zum Anschluss eines solchen Fahrzeugschlüs- selschreib-/lesegeräts und zur mittelbaren Kommunikation mit dem Kraftfahrzeug über einen in das Fahrzeugschlüsselschreib-/Iesegerät eingelegten Fahrzeug- Schlüssel geeignet sein.The diagnostic unit only has to be suitable for connection of such a vehicle key writing / reading device and for indirect communication with the motor vehicle via a vehicle key inserted in the vehicle key writing / reading device.
Bei der erfindungsgemäßen Kommunikation gemäß dieser Variante fungiert der Fahrzeugschlüssel samt Fahrzeugschlüsselschreib-/Iesegerät gewissermaßen als Gateway zwischen Kraftfahrzeug und Diagnoseeinheit. Vor dem Aufbau der Kommunikationsverbindung zwischen Kraftfahrzeug und Diagnoseeinheit wird in an sich bekannter Weise die Berechtigung des Fahrzeugschlüssels anhand der in diesem gespeicherten Berechtigungsdaten geprüft. Die Berechtigungsdaten brauchen nicht an die Diagnoseeinheit übertragen zu werden.In the inventive communication according to this variant, the vehicle key together with the vehicle key writing / reading device effectively acts as a gateway between the motor vehicle and the diagnostic unit. Before the establishment of the communication connection between the motor vehicle and the diagnostic unit, the authorization of the vehicle key is checked in a manner known per se on the basis of the authorization data stored therein. The authorization data need not be transmitted to the diagnostic unit.
Das Kraftfahrzeug muss sich für eine ordnungsgemäße Funktion eines Verfahrens gemäß dieser zweiten Variante der Erfindung in ausreichender Nähe zu dem in das Fahrzeugschlüsselschreib-/Iesegerät eingelegten Fahrzeugschlüssel befinden.For a proper functioning of a method according to this second variant of the invention, the motor vehicle must be sufficiently close to the vehicle key inserted in the vehicle key writing / reading device.
Neben den bereits genannten Vorteilen liegt ein weiterer wesentlicher Vorteil eines erfindungsgemäßen Kommunikationsverfahren darin, dass es mit keinerlei Providerkosten verbunden ist. Auch ansonsten ist die Kommunikation gemäß der vorliegenden Erfindung unabhängig von einem Provider, einem Mobilfunknetz und/oder anderen öffentlichen oder teilöffentlichen Kommunikationsnetzen.In addition to the advantages already mentioned, another significant advantage of a communication method according to the invention is that it is not associated with any provider costs. Otherwise, the communication according to the present invention is independent of a provider, a mobile network and / or other public or semi-public communication networks.
Die beschriebene Kommunikationsformen sind in vielen Fällen über die bereits heute vorhandenen technischen Vorrichtungen durchführbar und erfordern keinen und/oder nur geringen Aufwand zur Adaption der vorhandenen Infrastruktur. Anhand der beigefügten Zeichnungen wird die Erfindung weiter erläutert. Dabei zeigen schematischThe described forms of communication can be carried out in many cases via the technical devices already available today and require no and / or only little effort to adapt the existing infrastructure. Reference to the accompanying drawings, the invention will be further explained. This show schematically
Fig. 1 eine bevorzugte Ausführungsform einer Vorrichtung zur Durchführung eines erfindungsgemäßen Verfahrens der ersten Variante undFig. 1 shows a preferred embodiment of an apparatus for performing a method according to the invention of the first variant and
Fig. 2 eine bevorzugte Ausführungsform einer Vorrichtung zur Durchführung eines erfindungsgemäßen Verfahrens der zweiten Variante.Fig. 2 shows a preferred embodiment of an apparatus for carrying out a method according to the invention of the second variant.
Zwischen einer Diagnoseeinheit und einem Kraftfahrzeug ist eine Kommunikationsverbindung zum Austausch diagnoserelevanter Daten aufzubauen.Between a diagnostic unit and a motor vehicle, a communication connection for exchanging diagnosis-relevant data is to be set up.
Fig. 1 zeigt eine bevorzugte Ausführungsform einer Vorrichtung zur Durchführung eines erfindungsgemäßen Verfahrens der ersten Variante. Die Diagnoseeinheit 1 ist zur drahtlosen Kommunikation mit dem Kraftfahrzeug 2 an einen WLAN-Router 5 angeschlossen. Das Kraftfahrzeug 2 weist ein - nicht eigens abgebildetes - WLAN- Gateway auf, welches an eine Diagnoseschnittstelle des Kraftfahrzeugs 2 angeschlossen ist. Der WLAN-Router 5 und das WLAN-Gateway des Kraftfahrzeugs 2 ermöglichen aus technischer Sicht eine WLAN-Kommunikation zwischen der Diagnoseeinheit 1 und dem Kraftfahrzeug 2. Der Aufbau von Kommunikationsverbindungen über diese WLAN-Schnittstelle ist jedoch an die Überprüfung einer Berechtigung der Diagnoseeinheit 1 gebunden. An den Diagnosetester 1 ist hierzu ferner drahtgebunden ein Fahrzeugschlüssellesegerät 3 angeschlossen, in welches ein dem Kraftfahrzeug 2 zugeordneter Fahrzeugschlüssel 4 eingelegt werden kann. Sofern ein Fahrzeugschlüssel 4 eingelegt ist, werden über die drahtgebundene Kommunikationsverbindung zwischen dem Fahrzeugschlüssellesegerät 3 und dem Diagnosetester 1 Berechtigungsdaten von dem Fahrzeugschlüssel 4 an den Diagnosetester 1 übertragen. Der Diagnosetester 1 weist anhand der empfangenen Be- rechtigungsdaten gegenüber dem Kraftfahrzeug 2 seine Berechtigung zur Kommunikation mit dem Kraftfahrzeug nach. Der zum Nachweis der Berechtigung erforderliche Informationsaustausch erfolgt - ebenso wie die anschließende Kommunikation - bereits über die WLAN-Schnittstelle. Fig. 2 zeigt eine bevorzugte Ausführungsform einer Vorrichtung zur Durchführung eines erfindungsgemäßen Verfahrens der zweiten Variante. Die Diagnoseeinheit 1 ' ist zur drahtlosen Kommunikation mit dem Kraftfahrzeug 2' an ein Fahrzeugschlüs- selschreib-/lesegerät 3' angeschlossen. In dieses Fahrzeugschlüsselschreib- /lesegerät 3' wird ein dem Kraftfahrzeug 2' zugeordneter Fahrzeugschlüssel 4' eingelegt. Zwischen dem Fahrzeugschlüssel 4' und dem Kraftfahrzeug 2' ist - beispielsweise für die Entriegelung des Kraftfahrzeugs - eine Funkschnittstelle vorgesehen. Diese Funkschnittstelle wird im vorliegenden Fall zur Kommunikation der DiagnoseeinheifT mit dem Kraftfahrzeug 2' genutzt. Der fahrzeugseitige Teil der Funkschnittstelle ist hierzu in solcher Weise ausgeführt und mit einer Diagnoseschnittstelle des Kraftfahrzeugs 2' verbunden, dass ein Austausch diagnoserelevanter Daten über die Funkschnittstelle möglich wird. Der Fahrzeugschlüssel 4' und das Fahrzeugschlüsselschreib-/Iesegerät 3' fungieren gemeinsam als Gateway zwischen Kraftfahrzeug 2' und Diagnoseeinheit V. Vor dem Aufbau einer Kommunikati- onsverbindung zwischen Kraftfahrzeug 2' und Diagnoseeinheit 1 ' wird über ein Challenge-Response-Verfahren die Berechtigung des Fahrzeugschlüssels 4' anhand der in diesem gespeicherten Berechtigungsdaten geprüft. Eine erfolgreich ü- berprüfte Berechtigung des Fahrzeugschlüssels 4' wird als Berechtigung der Diagnoseeinheit 1 ' zum Aufbau einer Kommunikationsverbindung mit dem Kraftfahrzeug 2' gewertet. Fig. 1 shows a preferred embodiment of an apparatus for performing a method according to the invention of the first variant. The diagnostic unit 1 is connected to a WLAN router 5 for wireless communication with the motor vehicle 2. The motor vehicle 2 has a - not specifically illustrated - WLAN gateway, which is connected to a diagnostic interface of the motor vehicle 2. The WLAN router 5 and the WLAN gateway of the motor vehicle 2 allow a WLAN communication between the diagnostic unit 1 and the motor vehicle 2 from a technical point of view. However, the establishment of communication connections via this WLAN interface is linked to the checking of an authorization of the diagnostic unit 1 , For this purpose, a vehicle key reader 3 is connected to the diagnostic tester 1 by way of a wired connection, in which a vehicle key 4 assigned to the motor vehicle 2 can be inserted. If a vehicle key 4 is inserted, authorization data are transmitted from the vehicle key 4 to the diagnostic tester 1 via the wired communication connection between the vehicle key reader 3 and the diagnostic tester 1. Based on the received authorization data relative to the motor vehicle 2, the diagnostic tester 1 proves its authorization for communication with the motor vehicle. The information exchange required for proof of authorization already takes place via the WLAN interface - as well as the subsequent communication. FIG. 2 shows a preferred embodiment of a device for carrying out a method according to the invention of the second variant. The diagnostic unit 1 'is connected for wireless communication with the motor vehicle 2' to a vehicle key writing / reading device 3 '. In this vehicle key writing / reading device 3 ', a motor vehicle 2' associated vehicle key 4 'is inserted. Between the vehicle key 4 'and the motor vehicle 2' is provided - for example, for the unlocking of the motor vehicle - a radio interface. This radio interface is used in the present case for communication of DiagnoseeinheifT with the motor vehicle 2 '. The vehicle-side part of the radio interface is designed for this purpose in such a way and connected to a diagnostic interface of the motor vehicle 2 'that an exchange of diagnostic-relevant data via the radio interface is possible. The vehicle key 4 'and the vehicle key writing / reading device 3' function together as a gateway between the motor vehicle 2 'and the diagnosis unit V. Before establishing a communication connection between the motor vehicle 2' and the diagnosis unit 1 ', the authorization of the vehicle is established via a challenge-response method Vehicle key 4 'checked on the basis of the authorization data stored in this. A successfully checked authorization of the vehicle key 4 'is evaluated as the authorization of the diagnostic unit 1' for establishing a communication connection with the motor vehicle 2 '.

Claims

Patentansprüche claims
1. Verfahren zur Kommunikation zwischen einem Kraftfahrzeug und einer Diagnoseeinheit, bei welchem eine drahtlose Kommunikationsverbindung zwischen dem Kraftfahrzeug und der Diagnoseeinheit aufgebaut wird, nachdem eine Berechtigung der Diagnoseeinheit überprüft worden ist, dadurch gekennzeichnet, dass die Diagnoseeinheit mit einem dem Kraftfahrzeug zugeordneten Fahrzeugschlüssel verbunden wird1. A method for communication between a motor vehicle and a diagnostic unit, in which a wireless communication connection between the motor vehicle and the diagnostic unit is established after an authorization of the diagnostic unit has been checked, characterized in that the diagnostic unit is connected to a motor vehicle associated vehicle key
" und die Berechtigung der Diagnoseeinheit anhand von in dem Fahrzeug- Schlüssel gespeicherten Berechtigungsdaten überprüft wird.and the authorization of the diagnostic unit is checked on the basis of authorization data stored in the vehicle key.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die Diagnoseeinheit über eigene Mittel zur drahtlosen Kommunikation mit dem Kraftfahrzeug verfügt und dass Berechtigungsdaten von dem Fahrzeugschlüssel an die Diagnoseeinheit übertragen werden.2. The method according to claim 1, characterized in that the diagnostic unit has its own means for wireless communication with the motor vehicle and that authorization data are transmitted from the vehicle key to the diagnostic unit.
3. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die Kommunikation der Diagnoseeinheit mit dem Kraftfahrzeug über den Fahrzeugschlüssel erfolgt.3. The method according to claim 1, characterized in that the communication of the diagnostic unit with the motor vehicle via the vehicle key.
4. Diagnoseeinheit zur Durchführung eines Verfahrens nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Diagnoseeinheit Mittel zur Verbindung mit einem dem Kraftfahrzeug zugeordneten Fahrzeugschlüssel aufweist, dass die Diagnoseeinheit geeignet ist, Berechtigungsdaten von dem Fahrzeugschlüssel zu empfangen, dass die Diagnoseeinheit zur mittelbaren oder unmittelbaren drahtlosen4. Diagnostic unit for carrying out a method according to one of claims 1 to 3, characterized in that the diagnostic unit comprises means for connection with a motor vehicle associated vehicle key that the diagnostic unit is adapted to receive authorization data from the vehicle key, that the diagnostic unit for indirect or immediate wireless
Kommunikation mit dem Kraftfahrzeug geeignet ist, dass die Diagnoseeinheit geeignet ist, anhand der empfangenen Berechtigungsdaten eine Berechtigung gegenüber dem Kraftfahrzeug nachzuweisen. Communication with the motor vehicle is suitable that the diagnostic unit is suitable to prove based on the received authorization data authorization against the motor vehicle.
5. Diagnoseeinheit nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, dass sie über eigene Mittel zur unmittelbaren drahtlosen Kommunikation mit dem Kraftfahrzeug verfügt.5. Diagnostic unit according to one of claims 4 or 5, characterized in that it has its own means for direct wireless communication with the motor vehicle.
6. Diagnoseeinheit nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, dass sie über geeignete Mittel verfügt, um mit dem Kraftfahrzeug über die gleiche Funktechnologie zu kommunizieren, über die auch der Fahrzeugschlüssel beim Ver- und Entriegeln mit dem Kraftfahrzeug kommuniziert.6. Diagnostic unit according to one of claims 4 or 5, characterized in that it has suitable means to communicate with the motor vehicle via the same wireless technology, which also communicates with the vehicle key during locking and unlocking with the motor vehicle.
7. Diagnoseeinheit nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass sie zum Anschluss eines Fahrzeugschlüsselschreib-/Iesegeräts und zur mittelbaren Kommunikation mit dem Kraftfahrzeug über einen in das Fahr- zeugschlüsselschreib-/lesegerät eingelegten Fahrzeugschlüssel geeignet ist. 7. Diagnostic unit according to one of claims 4 to 6, characterized in that it is suitable for connection of a vehicle key writing / Iesegerats and for indirect communication with the motor vehicle via a vehicle key inserted in the vehicle key writing / reading device.
EP05750542.2A 2005-06-14 2005-06-14 Communication method between a motor vehicle and a diagnostic unit Active EP1891605B1 (en)

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