Handle for a movable part of a motor vehicle and method for transferring data in a motor vehicle

Abstract

Handle (HAH) for a movable part (T) of a motor vehicle (FZ), in particular a door (T), a tailgate or the like, with the following features: a signal line (SL) for transmitting signals between a handle-side electronic assembly (EBG) and at least one handle-external control device (FST); the handle-side electronic assembly (EBG), comprising: a handle-side radio device (NFCE) for communication with an external radio device (MFG) which is connected to the signal line (SL) and is designed to exchange data (SD) with the at least one handle-external control device (FST); a handle-side sensor device (SE) for detecting a user's (BE, FH) approaching the handle (HAH) or touching a part of the handle (HAH), wherein the handle-side sensor device (SE) is connected to the handle-side radio device (NFCE) in such a way as to transmit sensor data (SD) via the handle-side radio device (NFCE) to the signal line (SL), wherein the handle-side radio equipment (NFCE) has a radio-side microcontroller (MCN) which can be woken up for sensor data transmission by the handle-side sensor equipment (SE).

Description

[0001] The present invention relates to a handle for a movable part of a motor vehicle, in particular a door, a tailgate or the like, comprising an electronic assembly on the handle side with a radio transmitter and a sensor device on the handle side, wherein data can be efficiently transmitted from the handle-side devices to a vehicle-side control unit. 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 unit.

[0002] To prevent unauthorized access to a vehicle, especially a motor vehicle, modern access control systems or access arrangements in vehicles use electronic security systems. These systems authenticate a user through data communication between a primary communication device in the vehicle and a secondary communication device in the user's mobile identification device, such as a key or key fob. In a so-called passive access arrangement, a primary communication device in the vehicle sends out request signals (especially low-frequency request signals, e.g., at 125 kHz), triggered in particular by a user touching or approaching a sensor in a door handle.A mobile identification device carried by the user, which receives a request signal, will respond to the request signal with a corresponding reply signal (in particular a high-frequency reply signal, e.g., at 433 MHz) to initiate an authentication or pre-authentication process. Data is exchanged in which the mobile identification device ultimately transmits its authentication code to the vehicle. If the authentication code is successfully verified, a user located directly at the vehicle can unlock the corresponding vehicle door or all vehicle doors by operating the door handle. Since no active operation of a mechanical or electrical identification device is required, the vehicle's security is not compromised.If access authorization must be performed by a user, this type of access authorization is also referred to as passive access authorization verification, and the corresponding access authorization systems are referred to as passive electronic access authorization systems.

[0003] In addition to the authentication method just described, where request and response signals are exchanged over a distance of 0.5 to 5 meters triggered by a proximity sensor in the door handle, short-range radio communication, e.g., according to the NFC (near field communication) standard, is also conceivable over a distance of up to 10 cm. In particular, it is also possible to install an NFC reader in the door handle, which then communicates with a passive NFC element (NFC tag), such as a credit card, or an active NFC element, such as a mobile phone, to perform an authentication process in which an authentication code from the NFC element is ultimately transmitted to the vehicle.

[0004] US 2004 / 0125545A1 describes a door handle system for motor vehicles with integrated electronics that enables wireless communication with an external control unit. The handle contains a sensor unit for detecting approach or touch by the user. The electronic unit in the handle processes the sensor data and sends corresponding signals to control door locking or unlocking.

[0005] EP 1 505 734 A2 discloses a vehicle access system based on user presence detection. It uses radio technology to enable communication between a portable transmitter (e.g., a key) and a receiver in the vehicle. As soon as the user is within range, an authentication process is automatically initiated, which, upon successful identification, grants access to the vehicle. The system can also recognize different user profiles and adjust corresponding vehicle functions.

[0006] US 2013 / 0018551A1 describes a vehicle control system that communicates via a central bus system. The vehicle's control units are connected via a data bus that can also operate in power-saving states. The system includes mechanisms for waking up individual control units or the entire bus system as needed, for example, through user input or sensor signals.

[0007] DE 102 38 134 A1 describes a method for controlling access to a vehicle using sensors and electronic control units. The invention uses non-contact sensors to detect the approach or touch of a user and then automatically controls the door locking mechanism. Communication between the sensors and control units takes place via a vehicle network.

[0008] US 2011 / 0309912 A1 discloses a vehicle handle system with integrated electronics and sensors that responds to user interactions. The handle contains an electronic unit that communicates with an external control unit to, for example, unlock a door. The sensors detect proximity or touch and transmit corresponding signals. Communication is wireless, and the electronic unit can be integrated directly into the handle housing.

[0009] DE 10 2009 041 434 A1 discloses a communication system for vehicles designed for energy efficiency. It describes CAN transceivers that can switch between an active communication mode and a power-saving sleep mode. The system makes it possible to selectively wake up control units when communication is required, for example, through user input or sensor signals.

[0010] US 2011 / 0248820A1 describes a vehicle control system with a wake-up function for bus systems. The control units can remain in a power-saving state and are activated as needed by external signals, such as from sensors or user input. The document explains how energy can be saved by selectively waking up individual components without impairing the system's responsiveness.

[0011] Due to the increasing need to use not only a conventional key-based identification device but also other personal wearable electronic devices to gain access to a vehicle, both a proximity sensor for a conventional identification device and an NFC reader would need to be installed on the vehicle's exterior, particularly on a door handle. Proximity sensor electronics typically have a 2-wire power supply with a current interface. For unidirectional transmission of the sensor status, the load current drawn by the electronics from the power supply is modulated into a code. A vehicle control unit that powers the sensor electronics detects the current modulation and extracts the transmitted sensor status from it.In contrast, NFC readers are connected to the vehicle's control unit via a data bus system, typically a LIN (local interconnect network) bus. When combining both sensors or devices in a single door handle, a 4-wire interface is required: a common ground wire, a power supply wire for the sensor electronics, a power supply wire for the NFC reader, and a LIN signal wire. The power supplies for the sensor electronics and the NFC reader cannot be combined, as the NFC reader's current would interfere with the sensor electronics' current modulation, preventing the vehicle electronics from reliably detecting the sensor status. A disadvantage of this approach, however, is the significant technical complexity required by the use of four wires, which must also be accommodated within the limited space of the door handle.

[0012] Therefore, the object of the present invention is to provide a means of authentication on a vehicle via various communication channels with minimized equipment effort.

[0013] This task is solved by the subject matter of the independent claims. Advantageous embodiments are the subject matter of the dependent claims.

[0014] A handle for a movable part of a motor vehicle, in particular a door, a tailgate, or the like, has the following characteristics. It has a signal line for transmitting signals between an electronic assembly on the handle side and at least one control device external to the handle. "External to the handle" means that the control device is not part of the handle itself, but may, for example, be part of the movable part or, more generally, part of the vehicle. In particular, the external control device may be a door control unit or, more specifically, a body control unit.Furthermore, the handle comprises an electronic assembly on the handle side with a radio device on the handle side for communication with an external radio device, which is connected to the signal line and is designed to exchange data with the at least one control device external to the handle (in particular, to exchange data between the external radio device and the control device external to the handle via the signal line or to act as a transfer interface). The external radio device can be a passive radio element that is first wirelessly powered by the radio device on the handle side for communication purposes, but it can also be designed as an active radio element that has its own power supply.A key feature of the invention is that the handle-side electronic assembly further includes a handle-side sensor device for detecting a user's approach to the handle or contact with a part of the handle. This sensor device is connected to the handle-side radio device in such a way as to transmit sensor data via the radio device to the signal line. This design eliminates the need for the handle-side sensor device to use the same signal line as the radio device, thus reducing the number of lines and consequently the complexity of the handle's design.

[0015] The handle can have a grip accessible to a user from the outside (from the outside of the vehicle) on the moving part of the vehicle. In particular, this grip is designed as a hollow body in which the electronic assembly can be housed. According to one embodiment, the grip can be fixedly attached to the moving part of the vehicle. Alternatively, however, a handle with a grip that can be pivoted and / or moved relative to the moving part of the vehicle by the user is conceivable.

[0016] According to a further development of the handle, it also has two electrical supply lines for the electronic assembly, in particular a common supply voltage line and a common ground line, for the electrical supply of the handle-side radio device and the handle-side sensor device. In this way, a 3-wire interface with two electrical supply lines and one data line in the form of the signal line is possible.

[0017] In a further embodiment, the radio device on the handle and the signal line are part of a data bus system, in particular a LIN bus system. This enables cost-effective communication between a large number of sensors or radio devices.

[0018] According to the invention, the radio device on the handle side has a microcontroller on the radio device side that can be woken up for sensor data transmission by the sensor device on the handle side. This means that the radio device on the handle side, or its microcontroller on the radio device side, does not always have to be in the active state or normal mode (although it is essentially the interface or gateway to the signal line for the sensor device on the handle side), but can be woken up from sleep mode as needed for sensor data transmission by the sensor device on the handle side. In this way, power can be saved for operating the electronic assembly on the handle side.On the other hand, if a user touches or approaches the handle, the sensor data must be forwarded as quickly as possible, which can be achieved by waking up the radio-side microcontroller through the handle-side sensor device.

[0019] According to a further embodiment, the handle-side radio device has a data interface connected to the signal line, which can be woken up by the radio-side microcontroller for data exchange via the signal line. This means that the radio-side data interface does not have to be constantly active or in normal mode, but can be woken from sleep mode by the radio-side microcontroller when needed (which in turn was woken up for sensor data transmission by the handle-side sensor device). This further reduces power consumption in the handle-side electronics assembly.

[0020] Finally, according to a further embodiment of the handle, the radio-side data interface is designed to send a wake-up signal via the signal line to at least one external control device in order to wake it up for data exchange via the signal line. This represents a further contribution to potential energy savings, since the external control device does not have to be constantly in an active or waking state, but can be woken up by the radio-side data interface when needed.

[0021] According to a further embodiment of the handle, the handle-side radio unit is designed to communicate with the external radio device via a short-range radio standard, in particular the NFC standard or the Bluetooth standard (industry standard according to IEEE 802.15.1 for data transmission between devices over short distances using radio technology). Such short-range communication enables safety-critical processes such as the authentication of an external radio device to the handle or the vehicle. As mentioned, passive or active radio devices, especially mobile phones, can be used as external radio devices.

[0022] The handle-side sensor device can have one or more sensor elements configured as proximity sensors and / or touch sensors. Furthermore, as mentioned above, the handle itself can be a hollow body with one or more sensor elements located inside it. When the user is near or touches the handle, this action is detected by the sensor element(s). It is also possible for the handle-side sensor device to include a microcontroller connected to the sensor element(s) or an intermediate processing unit. In this way, proximity and / or touch detection can be achieved.Touches of the handle by a user are detected by the sensor elements and forwarded to the sensor-side microcontroller, which, as described above, forwards this detected sensor data to the handle-side radio device for transmission to a control device external to the handle (possibly after all corresponding components have first been woken up or brought into an active state).

[0023] The external control device can be, in particular, part of a vehicle-side security system, such as an access control system. Upon receiving sensor data indicating approach or contact with the handle, this device transmits one or more request signals, for example via low-frequency (LF) antennas, to initiate an authentication process with a mobile identification device carried by the user. During this process, identification codes are exchanged, for example, via a radio-frequency (RF) connection. If the identification code of the mobile identification device is successfully verified by the vehicle, the movable part of the vehicle (a vehicle door or similar) can then be locked and / or unlocked.

[0024] According to a further aspect, a motor vehicle with the following characteristics is created. It has a movable part, in particular in the form of a door, a tailgate, or the like. Furthermore, it has a handle as described above or an embodiment thereof, which interacts with the movable part and is specifically provided or attached to the movable part, and finally, it has at least one vehicle-side 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 that offers several authentication options with minimized technical effort.

[0025] According to a further aspect of the invention, a method for transmitting data in a motor vehicle is provided, comprising a handle for a movable part of the motor vehicle and a vehicle-side control device. The handle has a handle-side radio device for communication with an external radio device and a handle-side sensor device for detecting a user's touch or approach to the handle. In the method, sensor data is first transmitted from the handle-side sensor device to the handle-side radio device. This sensor data is then forwarded from the handle-side radio device to the vehicle-side control device via a signal line.This means that the two components of the handle – the handle-side radio unit and the handle-side sensor unit – only require a single signal line to communicate with the vehicle-side control unit. This minimizes the design complexity of the handle for the moving part of the vehicle.

[0026] According to one embodiment of the method, a microcontroller on the radio device side of the handle-side radio device is woken up before the sensor data is transmitted. This waking up or activation is performed by the handle-side sensor device and has the advantage that the handle-side radio device or the microcontroller does not have to be constantly active, but can be in a sleep or inactive state to save power, but can then be woken up again by the handle-side sensor device if necessary.

[0027] Furthermore, it is conceivable that a microcontroller on the vehicle's control unit is woken up before the sensor data is forwarded. This would also allow for power savings on the vehicle's control unit side, as the vehicle's control device or its microcontroller is woken up, and can then be reactivated by the handle-side sensor unit via the handle's radio communication system if needed.

[0028] Advantageous design features of the handling, insofar as they are transferable to the motor vehicle or the process, are also applicable as advantageous design features of the motor vehicle or the process, and vice versa.

[0029] Exemplary embodiments of the present invention will now be explained in more detail with reference to the accompanying drawings. These show: Fig. 1 a schematic representation of a communication arrangement in a vehicle with a door handle electronics assembly and a vehicle-side control device according to an embodiment of the invention; Fig. 2 a flowchart to illustrate the transmission of sensor data from the door handle electronics assembly to the vehicle-side control device according to an embodiment of the invention; Fig. 3 a schematic representation of a motor vehicle with a communication arrangement according to Fig. 1.

[0030] It should first be on Fig. Reference is made to Figure 1, which shows a communication arrangement FKA for a motor vehicle. The communication arrangement FKA essentially consists of an electronic assembly EBG, which is advantageously provided in a handle or in the grip of a handle for the movable part of a vehicle, in particular a door, a tailgate, or the like. The electronic assembly EBG has a ground connection GND, which is connected to a ground line GL, and a power supply connection VBAT, which is connected to a power supply line VL. The power supply to the electronic assembly EBG and the components provided therein is ensured via these two connections. Finally, the electronic assembly EBG has a data connection LING, which is connected to a data line or signal line SL.

[0031] Furthermore, the electronic assembly EBG includes a handle-side radio device NFCE, which is specifically designed for communication according to the NFC standard. The electronic assembly EBG also includes a handle-side sensor device SE for detecting when a user touches or approaches the handle. Both NFCE and SE are powered via a common power supply SPV, which is electrically connected to the power supply terminal VBAT and has a ground connection.

[0032] A closer look at the NFCE radio device on the user interface reveals that its central component is a radio-side microcontroller (MCN) that communicates with a base station (BST). The base station (BST) is responsible for frequency generation and processing, including modulation and demodulation, of radio signals that can be transmitted from or received by an antenna (ANTN) via an antenna front end (FEA). Furthermore, the radio-side microcontroller (MCN) is connected via internal transmit / receive lines (TXD and RXD) to a radio-side data interface (LSEG) (specifically, a LIN transceiver), which in turn is connected to the data port (LING). The transmit / receive lines (TXD and RXD) are connected to the input / output ports (LIN, I / O) of the radio-side microcontroller (MCN).

[0033] Looking at the handle-side sensor unit (SE), its central component is a sensor-side microcontroller (MCS), which communicates with one or more sensor elements (SES) via a sensor-side signal converter (FES). These sensor elements (SES) can, for example, consist of three capacitive sensors and one Hall sensor to detect when a user's hand approaches or touches the handle. Furthermore, the sensor-side microcontroller (MCS) is connected to the radio-side microcontroller (MCN) to transmit sensor data or information to the vehicle-side control unit (FST), as will be explained in more detail below.

[0034] The vehicle-side control unit (FST) has a control unit-side data port (LINB) which, like the LING port, is connected to the signal line (SL). Specifically, the signal line (SL) can be part of a LIN (local interconnect network) data bus for a serial communication system for communication between sensors and similar devices in motor vehicles. The electronic module (EBG), or its handle-side radio unit (NFCE), as well as the vehicle-side control unit (FST), can be communication participants within the LIN bus. Specifically, the electronic module (EBG) can be a slave participant (subordinate participant), and the vehicle-side control unit (FST) can be a master participant (superior participant).

[0035] The vehicle-side control device, which can be configured in particular as a body control unit, has a vehicle-side microcontroller (MCB) as its central component. This microcontroller can communicate with a vehicle-side data interface device (especially in the form of a LIN transceiver) (LSEB) via corresponding transmit / receive lines (TXD and RXD) to receive data from the electronic module (EBG) via the signal line (SL) or to transmit data or messages to it. The transmit / receive lines (TXD and RXD) are connected to the input / output pins (LIN, I / O, CC) of the vehicle-side microcontroller (MCB).

[0036] The following will now be based on the flowchart of Fig. 2 A possible transmission of sensor data from the handle-side sensor device SE to the vehicle-side control device FST according to an embodiment of the invention is shown.

[0037] To illustrate the process of transmitting sensor data, the four essential components of the FKA communication arrangement are shown in blocks, with the individual process steps in these blocks depicted in chronological order from top to bottom in the image.

[0038] According to step S1, the sensor-side microcontroller MCS detects 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(s). The microcontroller MCS can be switched from a sleep state to a normal mode (activated state) at specific time intervals (for example, between 20 and 100 ms), in which it is able to monitor the sensor elements SES. If the microcontroller MCS detects an object according to step S1, the corresponding sensor data must be transmitted to the handle-side radio unit or the radio-unit-side microcontroller MCN. For this purpose, the microcontroller MCS must wake up the microcontroller MCN according to step S2. This is done, for example, by triggering an interrupt on the microcontroller MCN.Once the microcontroller MCN is woken up according to step N1, it begins its initialization routine. In doing so, it initializes the data communication system for transmission via the signal line SL. Specifically, according to step N2, it puts the radio-side data interface device LSEG into normal mode (activated state) by outputting the signal SLP_N for the data interface device LSEG. Then, according to step N3, a wake-up pulse (slave wake-up pulse, 150 µs "low") is sent first via a transmit line TXD, then via the signal line SL to the vehicle-side data interface device LSEB. This receives the wake-up pulse via the signal line SL according to step L1. To accelerate data transmission, various steps now take place in parallel on the side of the electronic assembly EBG (left in the image) and on the side of the vehicle-side control unit FST (right in the image).

[0039] While the microcontroller MCN of the handle-side radio unit NFCE sends a request to the sensor-side microcontroller MCS for data transmission according to step N4, and corresponding sensor data SD or a sensor code is sent to the radio-side microcontroller MCN according to step S3, the data interface unit LSEB simultaneously wakes up the vehicle-side microcontroller MCB via a receive line RXD according to step L2. This occurs, for example, by triggering an interrupt at the interrupt input of the microcontroller MCB. Accordingly, the vehicle-side microcontroller MCB is woken up or returned to its normal mode according to step B1. According to step B2, the vehicle-side data interface unit LSEB is returned to its normal mode by a signal SLP_N from the microcontroller MCB.Meanwhile, the radio-side microcontroller MCN has waited a predetermined time according to step N5 (so that all necessary initialization processes could be completed on the vehicle-side control unit FST) and now transmits the sensor data SD, first via the transmit line TXD, then via the signal line SL to the vehicle-side data interface unit LSEB, according to step N6. The LSEB receives the sensor data via the signal line SL, according to step L3, and forwards this sensor data to the vehicle-side microcontroller MCB via the receive line RXD. The MCB receives the sensor data at a separate receive port CC, according to step B3, and processes it.

[0040] For example, the vehicle-side control device FST can, in response to the receipt of sensor data, cause a vehicle-side transmitter / receiver (not shown) to send one or more request signals to a user-side mobile identification device so that authentication of the mobile identification device to the vehicle can be carried out as part of an access authorization check.

[0041] It is now in Fig. 3 referred to, in which a schematic representation of the in Fig. The communication arrangement FKA shown in Figure 1 is implemented in a vehicle FZ. The vehicle FZ has a movable part in the form of a door T, on the outside of which, accessible to a user, a handle TG is arranged. The door handle TG is designed as a hollow body, inside which the electronic assembly EBG is located. Both the door handle itself and the electronics installed within it belong to the handling mechanism HAH of the door T.

[0042] The electronics assembly EBG comprises the handle-side sensor unit SE and the handle-side radio unit NFCE. The electronics assembly is powered by the vehicle's battery BAT via the supply line VL (and the ground line GL). A data connection exists between the electronics assembly EBG and the vehicle's control unit FST via the data line SL.

[0043] To gain access to the vehicle, the present invention enables two methods: Firstly, it is possible for a user BE to bring their hand FH near the handle-side sensor device SE or to touch the door handle TG so that a corresponding authentication process is started, as is the case according to Fig. 2 has been described.

[0044] Furthermore, it is possible to bring an external radio device, such as a mobile phone MFG, very close (up to a maximum distance of approximately 10 cm) to the handle TG or the handle-side radio device NFCE, so that communication via a short-range radio connection, in particular according to the NFC standard, can be carried out in this way.

[0045] To detect whether an external radio device, such as a mobile phone (MFG), is in close proximity to the handset-side radio unit (NFCE), the radio unit's microcontroller (MCN) is switched from a sleep state to a normal mode (activated state) at specific time intervals (e.g., between 100 and 300 ms). In this mode, it is able to send query signals to a potential communication partner via the antenna (ANTN). If the microcontroller (MCN) receives a response signal from an external radio device, data can be exchanged via the short-range radio interface (FSS).It is possible that the external radio device transmits a corresponding identification code via the FSS short-range radio interface to the NFCE radio device on the handle and the SL data line to the vehicle-side control device FST, which checks the identification code and, if the test result is positive, unlocks, for example, the door T of the vehicle. The present invention thus enables authentication of a user at the vehicle via several different ways, whereby the device-related effort, in particular in the handle electronics, has been reduced, without having to accept a large loss in the reaction time from the detection of the approach to the handle-side sensor device until the start of the authentication process, initiated by the vehicle-side control device FST.

[0046] It should be noted that it is also possible to use the following instead of the one in Fig.In the embodiment shown in point 1, where the handle-side sensor unit and the handle-side radio unit each have their own microcontroller, only one microcontroller is required for both units. This microcontroller is then configured to regularly query the sensor element(s) SES and to wake up the handle-side data interface LSEG when sensor data needs to be transmitted to the vehicle-side control unit.

[0047] In summary, an electronic assembly for a handle of a movable part of a motor vehicle, in particular a door, a tailgate, or the like, is described, which has a signal line for transmitting signals between the handle-side electronic assembly and at least one external control device. Furthermore, the electronic assembly has a handle-side radio device for communication with an external radio device, which is connected to the signal line and is designed to exchange data with the at least one external control device (in particular, to exchange data between the external radio device and the external control device).Furthermore, the electronic assembly has a handle-side sensor device for detecting a user's approach to the handle or contact with a part of the handle. This handle-side sensor device is connected to the handle-side radio device in such a way as to transmit sensor data to the signal line via the radio device. In this way, user authentication at the vehicle can be implemented via several different methods while reducing the technical complexity.

Claims

[1] Handle (HAH) for a movable part (T) of a motor vehicle (FZ), in particular a door (T), a tailgate or the like, having the following features: a signal line (SL) for transmitting signals between a handle-side electronic assembly (EBG) and at least one handle-external control device (FST); the handle-side electronic assembly (EBG), comprising: a handle-side radio device (NFCE) for communication with an external radio device (MFG) which is connected to the signal line (SL) and is designed to exchange data (SD) with the at least one handle-external control device (FST); a handle-side sensor device (SE) for detecting a user's (BE, FH) approaching the handle (HAH) or touching a part of the handle (HAH), wherein the handle-side sensor device (SE) is connected to the handle-side radio device (NFCE) in such a way as to transmit sensor data (SD) via the handle-side radio device (NFCE) to the signal line (SL), wherein the handle-side radio equipment (NFCE) has a radio-side microcontroller (MCN) which can be woken up for sensor data transmission by the handle-side sensor equipment (SE). [2] Handle (HAH) according to claim 1, which further comprises two electrical supply lines (VL, GL) for the electronic assembly (EBG) for the electrical supply of the handle-side radio device (NFCE) and the handle-side sensor device (SE). [3] Handle (HAH) according to claim 1 or 2, wherein the handle-side radio device (NFCE) and the signal line (SL) are part of a data bus system, in particular a LIN bus system. [4] Handle (HAH) according to one of claims 1 to 3, wherein the handle-side radio device (NFCE) has a radio-side data interface device (LSEG) which is connected to the signal line (SL) and which can be woken up by the radio-side microcontroller (MCN) for data exchange via the signal line (SL). [5] Handle (HAH) according to one of claims 1 to 4, wherein the radio device-side data interface device (LSEG) is configured to send a wake-up signal to the at least one handle-external control device (FST) via the signal line (SL) in order to wake it up for data exchange via the signal line (SL). [6] Handle (HAH) according to any one of claims 1 to 5, wherein the handle-side radio device (NFCE) is designed to communicate with the external radio device (MFG) via a short-range radio standard, such as the NFC standard or Bluetooth standard. [7] Motor vehicle (MF) with the following characteristics: a movable part (T), in particular a door, a tailgate or the like; a handle (HAH) according to any one of claims 1 to 6, which interacts with the movable part (T); and at least one external control device (FST) for communication via a signal line (SL) of a handle-side electronic assembly (EBG) of the handle (HAH). [8] Method for transmitting data in a motor vehicle (FZ) with a handle (HAH) for a movable part (T) of the motor vehicle (FZ), which has a handle-side radio device (NFCE) for communication with an external radio device (MFG), and a handle-side sensor device (SE) for detecting a user's (BE,FH) approaching the handle (HAH) or touching a part of the handle (HAH), and with a vehicle-side control device (FST), wherein the method comprises the following steps: Transmission (S3,N4) of sensor data (SD) from the handle-side sensor device (SE) to the handle-side radio device (NFCE); Forwarding (N6, L3, B3) the sensor data (SD) from the handle-side radio device (NFCE) to the vehicle-side control device (FST) via a signal line (SL), where, prior to the step of transmitting (S3, N4) sensor data (SD), a radio-side microcontroller (MCN) is woken up (S2, N1). [9] Method according to claim 8, wherein a control device-side microcontroller (MCB) is woken up (B1) before the step of forwarding (N6, L3, B3) the sensor data (SD).

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