WO2014173902A1

WO2014173902A1 - Handle for a moving part of a motor vehicle, and method for transmitting data in a motor vehicle

Info

Publication number: WO2014173902A1
Application number: PCT/EP2014/058146
Authority: WO
Inventors: Thomas Bareiss; Dieter Sass
Original assignee: Continental Automotive Gmbh
Priority date: 2013-04-25
Filing date: 2014-04-22
Publication date: 2014-10-30
Also published as: DE102013207495A1; JP2016520736A; JP6173566B2

Abstract

The disclosure relates to a handle (HAH) for a moving part (T) of a motor vehicle (FZ), particularly a door, having the following features. The handle has a signal line (SL) for transmitting signals between a handle-based electronics assembly (EBG) and at least one handle-external control apparatus (FST). Furthermore, a handle-based electronics assembly is provided that has a handle-based radio device (NFCE) for communication with an external radio (MFG), said radio device being connected to the signal line (SL), and that is designed to interchange data (SD) with the at least one handle-external control apparatus (FST), and also a handle-based sensor device (SE) for sensing when a user (BE, FH) approaches the handle or when a portion of the handle is touched, the handle-based sensor device being connected to the handle-based radio device so as to forward sensor data (SD) to the signal line (SL) via the handle-based radio device. This allows various types of authentication to be implemented on the motor vehicle while reducing apparatus complexity.

Description

description

Handle for a moving part of a motor vehicle and method for transmitting data in a motor vehicle

The present invention relates to a handle for a moving part of a motor vehicle, in particular a door, a tailgate or the like, comprising a handle-side electronic assembly having a hand-side radio and a hand-side sensor device, wherein the hand-side devices transfer data efficiently to a vehicle-side control device are. Furthermore, the invention discloses a method for transmitting data in a motor vehicle between a handle for a movable part of the motor vehicle and a vehicle-side control device.

In order to prevent an unauthorized access to a vehicle, especially a motor vehicle, using modern access authorization systems or access arrangements in vehicles, electronic security systems in which the Authentifi ^¬ cation of a user mobile data communication between a first communication device of the vehicle with a second communication device in a Identification transmitter of the user, such as a key or key fob, takes place. In a so-called passive access arrangement, request signals (in particular low-frequency request signals, eg at 125 kHz) are transmitted by a first communication device of the vehicle, in particular triggered by touching or approaching a sensor in a door handle by the hand of a user. A user-carried mobile identification transmitter receiving a request signal will respond to receipt of the request signal with a corresponding response signal (in particular a high-frequency response signal, eg at 433 MHz) to initiate an authentication process. This data is exchanged, in which ultimately the mobile Identifi ^¬ cation transmitter his authentication code to the vehicle transmitted. Upon successful verification of Authentifi- zierungscodes it's possible that achieved a user who is located directly on the car by pressing the door handle an Ent ^¬ unbolt the corresponding vehicle door or all vehicle doors. Since no active pressing of a mechanical or electrical identification transmitter or key has to be carried out by a user, this type of access authorization is also referred to as a passive access authorization test, and the corresponding conditional access systems as passive electronic access authorization systems.

In addition to this just described possibility of authentication in which triggered by a proximity sensor in the door handle request signals and response signals are exchanged over a distance of 0.5 to 5 m, a short-range radio communication z. B. according to the NFC (near field communication) standard over a distance of up to 10 cm conceivable. In particular, it is also possible to do this

To arrange NFC reader in the door handle, which then with a passive NFC element (NFC tag), such as a check card, or an active NFC element, such as a mobile phone, connects to perform an authentication process, which ultimately has an authentication code an NFC element is transmitted to the vehicle.

Due to the ever-increasing need to use not only a conventional key-type identification device to obtain access to a vehicle, but also other personal portable electronic devices, both a proximity sensor for a conventional identification transmitter and an NFC reader on the vehicle exterior would have to be used , Be provided in particular on a door handle. Now, proximity sensor electronics typically have a 2-wire supply with a current interface. For unidirectional transmission of the status of the sensors, the load current which the electronics draws from the supply is modulated into a code. A vehicle-side control unit, which supplies the sensor electronics, detects the current modulation and takes from her the transmitted status of the sensors. In contrast, NFC readers are connected to the vehicle-mounted control unit via a data bus system, as a rule via a LIN (local interconnect network) bus. When combining both sensors or devices in a door handle thus a 4-wire interface is to be used, namely with a common ground line, a supply line for the sensor electronics, a supply line of the NFC reader and a LIN signal line. The power supplies of the sensor electronics and the NFC reader can not be combined, because otherwise the supply current of the NFC reader superimposed on the current modulation of the sensor electronics and the vehicle electronics can no longer reliably detect the status of the sensors. The disadvantage of this, however, is the high device complexity by the use of four lines, which also still need to be accommodated in the small dimensions of the door handle.

Thus, the object of the present invention is to carry out a possibility for authentication to a vehicle via different communication paths with minimized vorrich ^¬ technical complexity.

This task is solved by the subject-matter of the independent claims. Advantageous embodiments are the subject of the dependent claims.

In this case, a handle for a movable part of a motor vehicle, in particular a door, a tailgate or the like has the following features. It has a signal line for transmitting signals between a handle-side electronic module and at least one external control device. In this case, external handling means that the control device is not part of the handle, but may for example be part of the movable part or generally part of the vehicle. In particular, the handle-external control device may be a door control device or in particular a body control device. Further includes the handle has a handle-side electronics assembly having a handheld radio for communicating with an external radio connected to the signal line and adapted to communicate with the at least one hand-held control device (in particular, data between the external radio and the hand-held control device) In this case, the external radio can be a passive radio element, which is first supplied with power wirelessly for the communication by the handheld radio device, but it can also be designed as an active radio element having its own power supply The feature of the invention is that the handheld electronic assembly further includes a handle-side sensor device for detecting an approach of a user to the handle or a touch of a portion of the handle wherein the handle-side sensor device is so connected to the handle-side radio device to pass sensor data via the handle-side radio to the signal line. Because of this design, it is possible that the handle-side sensor device does not require a separate zusätz ^¬ Liche signal line for transmission of sensor data, but can use the same signal line as the handle radio device. In this way, the number of lines and thus the device complexity in the handle is reduced.

The handle may have a handle accessible to the outside of the moving part of the motor vehicle for a user (from the outside of the motor vehicle). In particular, this handle is designed as a hollow body, inside which the electronic assembly can be accommodated. The handle can according to one embodiment immovably on the movable part of the

Be arranged motor vehicle. Alternatively, however, a handle with a handle is conceivable that can be pivoted and / or moved relative to the movable part of the motor vehicle via an actuation of the user. According to a further development of the handle, the latter also has two electrical supply lines for the electronic module, in particular a common supply voltage line and a common ground line, for the electrical supply of the handheld radio device and the handheld sensor device. In this way, a 3-wire interface with two electrical supply lines and a data line in the form of the signal line is possible. According to a further embodiment, the hand-side radio device and the signal line are part of a data bus system, in particular of a LIN bus system. In this way, a low-cost communication between a plurality of sensors or radio devices can be created.

According to a further embodiment, the handle-side radio device has a radio-device-side microcontroller, which can be woken up for the sensor data transfer by the handle-side sensor device. This means that handle radio device or their wireless device-side microcontroller need not always in the active state or normal mode (although it virtually the transfer interface or gateway to the signal line for the handle side Sen ^¬ soreinrichtung) but can if required Sensor data passing through the handle-side sensor device are woken up from the sleep mode. In this way, power can be saved for operating the handheld electronics assembly. On the other hand, if a touch or approach of a user to the handle has been detected, the sensor data must be forwarded as quickly as possible, which can be achieved by waking up the radio-device-side microcontroller by the handle-side sensor device.

In accordance with a further embodiment, the handheld radio device has a data interface device on the radio device side, which is connected to the signal line and which can be woken up by the radio device side microcontroller for a data exchange via the signal line. The means that the radio device side data interface-digit device does not have to be constantly in an active state or in a normal mode, but can be awakened from the sleep mode by the radio device side microcontroller if necessary (in turn awakened to the sensor data transfer by the handle side sensor device has been) . In this way, power can still be saved with the handle-side electronics module. Finally, according to a further embodiment of the handle, the radio-device-side data interface device is designed to send a wake-up signal via the signal line to the at least one control-external control device in order to wake it up for a data exchange via the signal line. This makes another contribution to the possible

Energy saving, since even the external control device is not constantly in an active state or

Wake up state, but can be woken up if necessary by the funkein- direction-side data interface device.

According to another embodiment of the handle the handle end radio device is adapted to the external wireless device via a short-range radio standard, and in particular to the NFC standard or the Bluetooth standard (in ^¬ industrial standard IEEE 802.15.1 for the transfer of data between devices over short distances via radio technology), to communicate. By means of such a near-field communication, security-critical processes such as the authentication of an external radio device to the handle or the motor vehicle can thus be realized. As I said, the possibility passive external radios radio elements or active Funkele ^¬ ments, especially mobile phones, to be used. The handle-side sensor device may be a case or more sensor elements, which are constructed as proximity sensor ^¬ elements and / or as touch-sensing elements. Furthermore, as already mentioned above, the handle of the ^

Handle may be formed as a hollow body, wherein the one or more sensor elements are located in the interior of the handle. If the user is in the vicinity of the handle or touches the handle, this action is detected by the sensor element (s). It is now also possible for the handle-side sensor device to comprise a sensor device-side microcontroller which is connected to the one or more sensor elements or to an intermediate processing device thereof. In this way, touches of the handle may be detected by the sensor elements and passed on to the sensor-side microcontroller, which, as described above, transmits this detected sensor data to the handheld radio device for transmission to an external control device (possibly. after all the corresponding first Kom ^¬ components have been transferred or woken up in an active state).

The handle external control apparatus can, in particular part of a vehicle-side backup system such as a to be transition system ^¬ that after receipt of the sensor data with which an approach or a touch of the handle will be displayed, for example the low frequency (LF = low frequency) antennae, one or more Sending request signals in order to initiate an authentication process with a mobile identification transmitter carried by the user, in which identification codes are then exchanged via a radio frequency (RF) connection, for example. Upon successful verification in particular of the identification ^¬ codes of the mobile identification transmitter on the part of the vehicle, it can then come to a dis and / or locking of the movable part of the vehicle (a vehicle door or the like).

According to a further aspect, a motor vehicle having the following features is provided. It has a movable part, in particular in the form of a door, a tailgate or the like. Furthermore, it has a handle according to the above description or an embodiment thereof, which cooperates with the movable part. ₀

menwirkt and in particular provided on the movable part or. Finally, at least one vehicle-mounted control device (corresponding to the external control device for communication via the signal line with the handle-side electronic assembly of the handle). In this way, a motor vehicle is created which has a plurality of options for authentication with mini ^¬ metered device complexity.

According to a further aspect of the invention, a method for transmitting data in a motor vehicle is provided which comprises a handle for a moving part of a motor vehicle and a vehicle-mounted control device. The handle has a hand-side radio device for communication with an external radio, and a handle side Sen ^¬ soreinrichtung for detecting the touch or approach of a user to the handle. In the method, sensor data are first transmitted from the handle-side sensor device to the handle-side radio device. Then, this sensor data is forwarded from the hand-side radio to the on-vehicle control device via a signal line. This means that the two components of the handle, the hand-side radio device and the hand ^¬ side sensor device only need a single Sig ^¬ nalleitung to communicate with the vehicle-mounted control device. In this way, the device-technical effort in the design of the handle for the moving part of the vehicle is minimized. According to one embodiment of the method, a radio-device-side microcontroller of the handling-side radio device is woken up before the step of transmitting sensor data. This waking or activation is done by the handle-side sensor device and has the advantage that the handle-side radio or the microcontroller does not have to be constantly active, but may be in a dormant or inactive state to save power, but then If necessary, it can be woken up again on the part of the sensor-side sensor device.

Furthermore, it is conceivable that before the step of

Forwarding the sensor data a controller-side microcontroller of the vehicle-mounted control device is awakened. Thus, it is also possible here for electricity to be saved on the side of the vehicle-side control device, in which the vehicle-side control device or its microcontroller on the control side is woken up, whereby it can then be reactivated by the handle-side sensor device via the handle-side radio device.

Advantageous embodiments of the handle are, as far as applicable to the motor vehicle or the method transferable, as advantageous embodiments of the motor vehicle or the method applicable, and vice versa.

In the following, exemplary embodiments of the present invention will now be explained in more detail with reference to the accompanying drawings. Show it:

1 shows electronic assembly is a schematic representation of a Kommunikati ^¬ onsanordnung in a vehicle with a door handle and a vehicle-side

Control device according to an embodiment of the invention;

FIG. 2 shows a flow diagram for the illustration of the transmission of sensor data from the door handle electronics module to the vehicle-side control device according to an embodiment of the invention;

FIG. 3 shows a schematic representation of a motor vehicle with a communication arrangement according to FIG. 1.

Reference is first made to FIG. 1, in which a communication arrangement FKA for a motor vehicle is shown. The Communication arrangement FKA consists essentially of an electronic assembly EBG, which is advantageously provided in a handle or in the handle of a handle for the moving part of a vehicle, in particular a door, a tailgate or the like. The electronic assembly EBG has a ground terminal GND connected to a ground line GL and has a power supply terminal VBAT connected to a power supply line VL. The power supply to the electronic module EBG or the components provided therein is ensured via these two connections. Finally, the electronic module EBG has a data connection LING, which is connected to a data line or signal line SL. Furthermore, the electronic module EBG comprises a hand-side radio NFCE, which is designed in particular for communication according to the NFC standard. Furthermore, the electronic module EBG comprises a handle-side sensor device SE for detecting the contact or approach of a user to the handle or the handle on the handle. Both A ^¬ directions NFCE and SE are supplied via a common voltage supply SPV energy or voltage, which voltage supply means SPV communicates with the power supply terminal VBAT in electrical connection and a ground connection.

Looking at the handle-end radio device NFCE ge ^¬ more precisely, so does this as the central building block, a RF systems direction side MCN microcontroller, which communicates with a base station BST. The base station BST serves for the frequency generation resp. Frequency processing, including modulation and demodulation, for radio signals that can be radiated through or received from an antenna ANTN via an antenna front end FEA Further, the radio side microcontroller MCN is over internal transmit / receive lines TXD and RXD with a radio-device-side data interface device LSEG (in particular in the form of a LIN transceiver) which in turn is connected to the data port LING. The transmission / reception lines TXD and RXD are in this case connected to input / output connections LIN, I / O of the radio-device-side microcontroller MCN.

Considering now the handle-side sensor device SE, it has as a central component a sensor-device-side microcontroller MCS, which is connected via a sensor-device-side signal converter FES to one or more sensor elements SES. In this case, for example, three capacitive sensors and a Hall sensor may be provided as sensor elements SES in order to detect the approach or contact of the hand of a user to the handle or the handle of the handle. Furthermore, the sensor device-side microcontroller MCS is connected to the radio-device-side microcontroller MCN in order to transfer sensor data or sensor information for forwarding to the vehicle-mounted control device FST, as will be explained in more detail below.

The vehicle-side control device FST initially has a control device-side data connection LINB, which, like the connection LING, is connected to the signal line SL. In particular, the signal line SL can be part of a LIN (Local Interconnect Network) -Datenbusses for a serial communica ^¬ cation system for the communication of sensors and the like in motor vehicles to be. The electronic module EBG or its hand-side radio NFCE and the vehicle-mounted control device FST can be communication subscribers within the LIN bus. In particular, the Elect ^¬ ronikbaugruppe EBG may be a slave station (secondary users), and may be the vehicle-side control device FST a master user be (parent node).

The vehicle-side control device, which may be designed in particular as a body control device ("body controller"), has as a central component a vehicle-side Microcontroller MCB on. The latter can communicate via corresponding transmission / reception lines TXD and RXD with a vehicle-side data interface device (in particular in the form of a LIN transmission / reception device) LSEB in order to receive data from the electronic module EBG via the signal line SL or data or messages transfer there. The transmission / reception lines TXD and RXD are in this case connected to input / output connections LIN, I / O, CC of the vehicle-side microcontroller MCB.

In the following, a possible transmission of sensor data of the handle-side sensor device SE to the vehicle-side control device FST according to an embodiment of the invention will now be illustrated with reference to the flowchart of FIG.

To illustrate the sequence of transmission of sensor data, the four essential components of the communication arrangement FKA are shown in blocks, wherein in these blocks, the individual process steps are shown in chronological order from top to bottom in the image.

According to a step Sl, the approach of an object (such as a

User) to the handle or a touch of the handle or a part thereof via the sensor element or SES detected. In this case, the microcontroller MCS at certain time intervals (for example, between 20 and 100 ms) are brought from a sleep state to a normal mode (activated state) in which he is able to monitor the sensor elements SES. If the microcontroller MCS has detected an object according to step S1, then corresponding sensor data must be transmitted to the handheld radio device or to the radio device side microcontroller MCN. For this purpose, the microcontroller MCS must the microcontroller MCN according to step S2 wake. This happens, for example, by triggering an interrupt on the microcontroller MCN. As soon as the microcontroller MCN is woken up according to step N1, it starts its initialization routine. He initializes the data communication system for transmission via the signal line SL. In particular, according to step N2, it sets the radio-device-side data interface device LSEG into a normal mode (activated state) by outputting the signal SLP_N for the data interface device LSEG at an output. Then, according to step N3, a wake-up pulse (slave) is first sent via a transmission line TXD, then via the signal line SL to the vehicle-side data interface device LSEB, which receives the wake-up pulse via the signal line SL In order to accelerate the data transmission, various steps now take place in parallel on the side of the electronic module EBG (on the left in the picture) and on the side of the vehicle-mounted control device FST (on the right in the picture) Request to the sensor-side microcontroller MCS with the request for data transmission according to step N4 is provided and corresponding sensor data SD or a sensor code sent to the funkeinrichtungsseifigen microcontroller MCN according to step S3, awakens the data interface device LSEB parallel thereto according to step L2 the vehicle-side microcontroller MCB via a receiving line RXD. This happens, for example, by triggering an interrupt on the microcontroller MCB at its interrupt input. Accordingly, the vehicle-side microcontroller MCB is woken or brought into its normal mode according to step Bl. According to step B2, the vehicle-side data interface device LSEB is brought back into the normal mode by a signal SLP_N from the microcontroller MCB. In the meantime, the radio-device-side microcontroller MCN has waited a predetermined time in accordance with step N5 (so that all necessary initialization operations could be completed on the side of the vehicle-mounted control device FST) and now transmits the sensor data SD first via the transmission line TXD and then via the signal line SL to the on-board data interface device LSEB. The latter receives the sensor data via the signal line SL according to step L3 and forwards this sensor data to the receiving line RXD to the vehicle-side microcontroller MCB. In step B3, the latter receives the sensor data at a separate reception terminal CC and processes it.

For example, the vehicle-side control device FST, in response to the receipt of the sensor data, cause an unillustrated vehicle transceiver to send one or more request signals to a user-side mobile identification transmitter, thereby authenticating the mobile identification transmitter to the vehicle as part of an access authentication test can be carried out.

Reference is now made to FIG. 3 in which a schematic representation of the communication arrangement FKA shown in FIG. 1 is shown realized in a vehicle FZ. The vehicle FZ has a movable part in the form of a door T, on the outside and accessible to a user a handle or door handle TG is arranged. The door handle TG is designed as a hollow body, in the interior of which the electronic assembly EBG is located. Both the door handle itself and the electronics installed therein belong to the handle HAH the door T.

The electronic module EBG comprises the handle-side sensor device SE and the handle-side radio device NFCE. In this case, the electronic module is powered by a battery BAT of the vehicle via the supply line VL (and the ground ^¬ line GL) with power. On the other hand, there is a data connection via the data line SL between the electronic module EBG and the vehicle-side control device FST.

In order to obtain access to the vehicle, the present invention allows two ways: Firstly, it is possible for a user BE to bring his hand FH close to the handle-side sensor device SE or to touch the door handle TG in order to start a corresponding authentication process, as described in US Pat Figure 2 has been described.

Furthermore, it is possible that an external radio, such as a mobile phone MFG very close (up to a maximum distance of about 10 cm) is brought to the handle TG and the handle-side radio NFCE, so in this way communication via a Short-range radio link, in particular according to the NFC standard can be performed.

In order to detect whether an external wireless device such as a Mo ^¬ biltelefon MFG, located in close proximity to handle radio device NFCE, the radio device side microcontroller MCN is at certain time intervals (for example between 100 and 300 ms) (from a sleep state to a normal mode activated state) in which it is able to send ANTN request signals to a potential communication partner via the antenna. If the microcontroller MCN has received a response signal from an external radio, data can be exchanged via the short-range radio interface FSS. It is possible that via the short-range radio interface FSS, the external radio transmits a corresponding identification code on the handle-side radio NFCE and the data line SL to the vehicle-mounted control device FST, which checks the identification code and unlocks the door T of the vehicle, for example, if the result of the test is positive. The present invention thus enables a Authentifi ^¬ cation of a user on the vehicle over several different paths, wherein the apparatus-technical effort has been particularly reduced in the handle electronics, without a large loss in the reaction time of the detection of the approach to the handle-side sensor means to the beginning of Au - Thentifizierungsvorgangs, initiated by the vehicle-mounted control device FST to accept. It should be noted that it is also possible, instead of the embodiment shown in Figure 1, in which the handle-side sensor device and the handle-side radio each have their own microcontroller, only provide a microcontroller for both devices. This microcontroller is then adapted, on the one hand or the sensor elements SES query periodically and wake up the handle lo ^¬ benseitige data interface LSEG when ^¬ sensor data must be transmitted to the vehicle-side control device.

In summary, therefore, an electronic assembly for a handle of a movable part of a motor vehicle, in ^¬ particular a door, a tailgate or the like, described, which has a signal line for transmitting signals between the handle-side electronic assembly and at least one handle external control device. Further, the electronic board has a handheld radio for communicating with an external radio connected to the signal line and adapted to exchange data with the at least one off-board control device (in particular, to exchange data between the external radio and the off-board control device). In addition, the electronic assembly has a hand-side sensor device for detecting a user approach to the handle or a touch of a part of the handle, wherein the handle-side sensor device is so connected to the handle-side radio device, to pass sensor data via the handle-side radio to the signal line. In this way, an authentication of a user on the vehicle can be realized by several different ways while reducing the device-technical effort.

Claims

claims

1st handle (HAH) for a movable part (T) of a

Motor vehicle (FZ), in particular a door (T), a

Tailgate or the like, comprising: a signal line (SL) for transmitting signals between a handheld electronic assembly (EBG) and at least one off-board control device (FST); the handheld electronic assembly (EBG) comprising: a handheld radio (NFCE) for communicating with an external radio (MFG) connected to the signal line (SL) and adapted to communicate data (SD) with the at least one off-board control device To replace (FST);

a hand-side sensor device (SE) for detecting an approach of a user (BE, FH) to the handle (HAH) or a touch of a part of the handle, wherein the handle-side sensor device (SE) is so connected to the hand ^¬ side radio device (NFCE) to pass sensor data (SD) to the signal line (SL) via the handheld radio (NFCE).

2. Handle according to claim 1, further comprising two electrical supply lines (VL, GL) for the electronic assembly (EBG) for the electrical supply of the hand-side radio (NFCE) and the handle-side sensor device (SE).

3. Handle according to claim 1 or 2, wherein the handle-side radio (NFCE) and the signal line (SL) are part of a data bus system, in particular LIN bus system.

4. Handle according to one of claims 1 to 3, wherein the handle-side radio (NFCE) has a funkeinrich- side microcontroller (MCN), which is for Sen- sordatenweitergabe by the handle-side sensor device (SE) is woken up.

5. Handle according to one of claims 1 to 4, wherein the handle-side radio (NFCE) tion- side data interface device (LSEG), which is connected to the signal line (SL) and the by the radio-side microcontroller (NFCE) for data exchange can be woken up via the signal line (SL).

6. Handle according to one of claims 1 to 5, wherein the radio device side data interface device (LSEG) is adapted to send via the signal line (SL) a wake-up signal to the at least one handle external control device (FST), in order to exchange data Wake up via the signal line (SL).

A handle according to any one of claims 1 to 6, wherein the handheld radio (NFCE) is adapted to communicate with the external radio (MFG) over a short range radio standard such as the NFC standard or Bluetooth standard.

8. Motor vehicle (FZ) with the following features:

a movable part (T), in particular a door, a tailgate or the like;

a handle (HAH) according to one of claims 1 to 8, which cooperates with the movable part (T); and

at least one external control device (FST) for communication via the signal line (SL) of the handle-side electronic assembly (EBG) of the handle (HAH).

9. A method for transmitting data in a motor vehicle with a handle (HAH) for a movable part (T) of a motor vehicle (FZ), the hand-side radio (NFCE) for communication with an external radio (MFG), and a handle-side sensor device (SE) for detecting an approach of a user (BE, FH) to the handle (HAH) or a touch of a part of the handle has, and with a vehicle-mounted control device (FST), the method comprising the following steps:

Transmitting (S3, N4) sensor data (SD) from the handheld sensor device (SE) to the handheld radio;

Forwarding (N6, L3, B3) the sensor data from the handheld radio (NFCE) to the vehicle side

Control device (FST) via a signal line (SL).

10. The method of claim 9, wherein prior to the step of transmitting sensor data, a radio-side microcontroller (MCN) is awakened (S2, N1).

11. The method of claim 9 or 10, wherein before the step of forwarding the sensor data, a controller side microcontroller (MCB) is awakened (Bl).