Apparatus for detecting activation behavior and for communicating at a vehicle

Abstract

The invention relates to a device (10) for detecting (260) an activation action and for communication at a vehicle (1), which is designed in particular to be integrated into the vehicle (1), having a communication mechanism (100) for repeatedly outputting (160) an electrical communication signal (20) to provide communication by means of a transmitting communication mechanism (110), a sensor assembly (200) for detecting (260) an activation action, a coupling mechanism (300) which is electrically connected to the transmitting communication mechanism (110), and an electronic processing device (210) of the sensor assembly (200), which is electrically connected to the coupling mechanism (300) to detect the output (160) of the communication signal (20) by means of the coupling mechanism (300).

Description

TECHNICAL FIELD

[0001] The invention relates to a device for activation behavior detection and for communication at a vehicle. The invention also relates to a method for this purpose. BACKGROUND

[0002] It is known from the prior art that sensors and in particular capacitive sensors can be used in vehicles for detecting an approach. This approach is for example an activation behavior of a user which can activate a function at the vehicle. In the case of safety-relevant functions such as the unlocking of a vehicle it is often provided that the activation of the function is a prerequisite for a successful verification by means of a communication of the vehicle with a mobile device. The detection of the activation behavior can then first result in the initiation of the verification by means of the communication in order to activate the function if the verification is successful. Correspondingly, the sensor and the communication means can be arranged adjacent to one another. The communication and the detection can then be carried out in parallel, but as far as possible alternately.

[0003] A disadvantage of the known solution is that the communication and in particular the near field communication and the detection can collide. For example, the detection can be disturbed by the generation of an alternating magnetic field when the near field communication is taking place. SUMMARY

[0004] The task of the invention is therefore to at least partially eliminate the aforementioned disadvantages. The task of the invention is in particular to provide an improved solution for activation behavior detection, while at the same time providing a communication in parallel therewith.

[0005] The aforementioned task is accomplished by the method and the device according to the invention. Here, the features and details described in relation to the device of the invention are obviously also applicable in relation to the method of the invention and vice versa, so that the disclosure relating to the individual inventive aspects is always or can be mutually referred to.

[0006] The task is in particular accomplished by a (preferably capacitive) device for the detection of an activation behavior and preferably for a (in particular electronic) communication, in particular preferably at a vehicle. In this case it is in particular intended that the device of the invention is designed for integration into a vehicle, for example into a door handle or another vehicle component of a vehicle. The device can for this purpose have for example a fixing means in order to be mounted into a vehicle component. The device preferably means an electronic circuit device.

[0007] Furthermore, the device of the invention can have the following components, which are preferably fixed on a printed circuit board of the device:

[0008] - a (in particular electronic) communication means for repeatedly outputting an electrical communication signal via an (in particular electrical, i.e. conductive) transmission communication means to provide a communication, wherein the repeated output is preferably performed at predetermined time intervals (in the following referred to as "output interval period") and in particular the communication signal outputted at this time each has a predetermined signal duration (e.g. 40 μs) and a frequency, in particular an NFC frequency (i.e. typically 13.56 MHz).

[0009] - a (in particular electronic) sensor assembly for (in particular capacitive and / or repeated) detection of an activation behavior, wherein the sensor electrodes are preferably repeatedly evaluated at predetermined time intervals for this purpose, in particular by repeated charge transfer,

[0010] - a (in particular conductive) coupling means, which is (in particular directly) electrically connected to the transmission communication means,

[0011] - a (in particular electronic) processing device of the sensor assembly, which is electrically connected (in particular directly electrically connected) to the coupling means, to detect the output of the communication signal by means of the coupling means.

[0012] In other words, the "communication signal, e.g. NFC (Near Field Communication) signal, is fed back to the processing device" can be used to detect the communication, in particular the NFC operation. It can thus be possible for the present invention that the output of the communication signal can be detected to identify a detection (i.e. a collision) which at least partially overlaps in time. For this purpose, the communication signal, e.g. an NFC-Ping, can be partially fed back to the processing device by means of the coupling means. The coupling means, for example, intercepts the communication signal at the transmission communication means for this purpose. The transmission communication means can in turn be electrically connected to a transmission output terminal (TX-Pin) of the communication means. The communication signal can also optionally be intercepted directly at the transmission output terminal, wherein the transmission communication means is then designed as an output terminal. The transmission communication means is in particular provided for transmitting the communication signal to a communication element, in particular a communication transmission antenna. The communication signal can accordingly be designed as an antenna signal. The communication signal is partially transmitted to an input port of the processing device, for example, by means of the coupling means. In this way, an abort at the processing device can be triggered by means of the fed-back communication signal to discard the measurement values taken by the detection at this point in time, since they are taken at the same time as the communication signal output. It is thus an advantage of the present invention that the reliability of the detection when working in parallel with the communication means can be improved.

[0013] The communication means and / or the processing device and / or the sensor assembly can each have an integrated circuit, such as a microcontroller, or be designed as such. The integrated circuit can have a plurality of inputs and / or outputs, for example terminals or ports, to receive and / or emit electrical signals. The communication signals can be output, for example, in the form of electrical signals by the outputs of the communication means and transmitted via at least one printed conductor of the printed circuit board. In this way, the output communication signals can be transmitted to a communication element, such as an antenna, by the transmitting communication means to generate a magnetic field for communication. The transmitting communication means can also be designed as a printed conductor here. A portion of the communication signals can also be tapped via the at least one printed conductor of the printed circuit board by the coupling means and fed back to the inputs of the processing device.

[0014] It is also advantageous if the vehicle is designed as a motor vehicle, in particular as a hybrid vehicle or an electric vehicle, preferably having a high-voltage on-board power supply and / or an electric motor. In addition, it can be possible to design the vehicle as a fuel cell vehicle and / or as a passenger car and / or as a semi-autonomous or autonomous vehicle.

[0015] The vehicle advantageously has a security system which allows verification, for example, by communication with a mobile device, for example an identity transmitter (ID transmitter) or a smartphone. Depending on the communication and / or the verification, at least one function of the vehicle can be activated. If verification of the mobile device is required for this purpose, the function can be a safety-relevant function, such as permission for unlocking and / or locking the vehicle or starting the engine. The security system can therefore also be designed as a passive entry system which initiates verification and / or activation of the function when the mobile device is detected in the vicinity of the vehicle without active manual operation of the mobile device. For this purpose, for example, communication signals are repeatedly emitted which can be received by the mobile device when it is in the vicinity and then trigger the verification. It is also possible for communication to be initiated when an activation action, for example an approach, is detected by the sensor assembly. Furthermore, the function can relate to activating the vehicle lighting and / or operating (opening and / or closing) a cover (for example a front cover or a rear cover or a side cover or a front door or a rear door or a side door). For example, the vehicle lighting is activated automatically when an approach is detected and / or a cover is operated when an activation action of the user is detected.

[0016] It is furthermore advantageous if the communication means are designed to perform communication in the form of near-field communication, in particular NFC, by means of a communication element, wherein, for this purpose, the transmitting communication means can be designed to be electrically connected to the communication element to transmit the communication signals (electrically) to the communication element and preferably to generate a communication area for near-field communication, in particular for communication with a mobile device, such as a smartphone or an NFC transponder. Here, the near-field communication can be limited spatially to the communication area, so that the approach of a mobile device, which can be identified, for example, by detection of an activation action, is required. It can also be possible that the communication signals are designed as ping signals (emission signals) to detect the approach of a mobile device and / or the entry of a mobile device into the communication area.

[0017] It is also possible to provide that the sensor assembly is designed as a capacitive sensor having at least one electrically conductive sensor electrode for performing the detection by means of the sensor electrode, wherein the sensor electrode is preferably arranged adjacent to a communication element for communicating with the communication means. The detection can be performed, for example, by repeatedly transferring a charge to the sensor electrode, wherein the amount of transferred charge can be evaluated by the processing device in order to measure the variable capacitance provided by the sensor electrode. The change in the capacitance can here be due to an activation event such as a proximity to the sensor electrode. The amount of transferred charge can be represented, for example, by a measurement value of the detection. For this purpose, for example, a charge is transferred to a capacitor or integrator and an analog-digital conversion of the voltage on the capacitor or in the integrator is performed in order to obtain the measurement value in digital form. The measurement value can then be temporarily stored in order to evaluate the variable capacitance and / or to measure or detect an activation event.

[0018] It is also conceivable to design the processing device to receive a portion of the communication signal (i.e. the feedback communication signal) via the coupling means in order to detect, in particular, a conflict between the communication and the detection, in order to preferably stop the detection when a conflict is detected. The detection can be stopped, for example, by discarding the measurement values taken simultaneously with the output of the communication signal. The communication signal can be an NFC-Ping, which is used, for example, to detect an NFC transponder by means of the communication means, in particular for card detection of an NFC card. The problem can be, however, that the NFC frontend of the communication means does not provide feedback when detecting or outputting an NFC-Ping. The coupling means can therefore be used to directly feed back the communication signal (in particular the Ping signal) to a port of the processing device, such as a microcontroller. If the detection is performed simultaneously with the output of the communication signal, this can be recognized as a conflict.

[0019] In order to stop the detection, an interruption of the processing device can be triggered, for example, when a conflict is detected, which results in that the measurement values of the detection cannot lead to a detection of an activation event during the output. In this way, a conflict can be recognized.

[0020] It can be advantageous if the processing device is designed within the scope of the application to receive a portion of the communication signal via the coupling means and to evaluate, in particular measure, by means of subsampling in order to detect (on the basis of the evaluation or measurement) the output of the communication signal. Subsampling can be required or meaningful because the communication signal frequency can be too high for the evaluation, in particular measurement, by means of the processing device. The processing device can be designed to prioritize the performance of the detection over the measurement of the communication signal frequency. It can also be possible that the processing device works sometimes in an energy-saving mode in which the clock frequency of the processing device is reduced and thus insufficient for lossless measurement of the communication signal frequency. Subsampling in particular means that the scan of the feedback communication signal is performed by the processing device with a bandwidth that is less than twice the bandwidth and / or the conditions of the Nyquist-Shannon sampling theorem are not met.

[0021] For example, the communication signal can be designed to have a frequency of 13.56 MHz (especially the NFC carrier frequency) and / or a signal duration of 40 μs (especially Ping). The communication signal is then output at this frequency for the duration and subsequently paused until the next output. The frequency may be too high for direct evaluation, especially measurement, using a processing device. For example, a counter component, such as an event counter of the processing device, can be used to count the communication signal frequency at a loss and trigger a pause in the processing device based on the result, which stops detection, i.e., specifically discards the current measurement value. However, the lossy NFC carrier frequency counting can be controlled and therefore still effective. In this case, it has unexpectedly been demonstrated that, despite subsampling, the result or evaluation is specific to the existence of the communication signal output and can be used to distinguish when an output occurs and when there is no output.

[0022] Furthermore, within the scope of this invention, it is possible to design the communication mechanism to repeatedly output a communication signal having a frequency of substantially 13.56 MHz and / or a signal duration in the range of 10 μs to 80 μs, preferably in the range of 20 μs to 60 μs, most preferably substantially 40 μs, and / or an interval (referred to as the output interval) in the range of 50 to 200 ms, preferably substantially 100 ms. It is possible to forgo the use of a quartz clock for component timing, thus implying a deviation from the specified values.

[0023] In addition, the detection can also be repeated by the sensor assembly, especially synchronized with the communication signal output, wherein the detection of the communication signal output is preferably used for synchronization to avoid simultaneous output and detection, i.e., conflict.

[0024] The communication mechanism can be constructed separately from the sensor assembly, particularly designed to be encapsulated by the sensor assembly, so that the sensor assembly cannot directly communicate with the communication mechanism, or in other words, cannot directly obtain a signal notifying "communication signal output" from the communication mechanism. Therefore, the communication signal can be specified to be "splittered" via a coupling mechanism, i.e., circuitically branched. However, this requires the processing device to check whether there is actually a communication signal or other signal at the coupling mechanism (signal edges or high / low levels cannot be simply evaluated). For this purpose, output detection can include measurements, particularly frequency measurements, of the returned communication signal by the processing device.

[0025] It can also be provided within the scope of the application that the processing device is designed to repeatedly activate the detection in parallel with the repeated output of the communication signal, and that a detection overlapping with the output is identified as a collision in dependence on a portion of the communication signal fed back by the coupling means. For example, the coupling means connect a transmit pin (Tx-Pin) of the communication means to a port of the processing device. If the communication signal is detected, for example by frequency evaluation, through this port, the measurement values caused by the overlapping detection can be discarded.

[0026] It can be provided that, for the detection, the sensor electrode is operated by the processing device by means of a sensor signal, which can cause a charge transfer to the sensor electrode. The sensor signal for the detection is transmitted, for example, at 333 kHz. The processing device, which perhaps also generates or evaluates the sensor signal, accordingly can not be suitable for sampling the communication signal without loss. Subsampling is also considered, which proves to be sufficient to perform only the output detection.

[0027] In another possible way, it can be provided that the processing device is designed to perform a frequency evaluation of the communication signal, preferably a frequency measurement of the communication signal, by means of the coupling means, in particular by means of subsampling. For this purpose, for example, a counter of the processing device is used, which has a frequency of 2 to 16 MHz, wherein the clock frequency can vary depending on the mode, for example, depending on whether an energy-saving mode of the processing device is present.

[0028] When the processing device has a counter component to perform a frequency evaluation of the communication signal by means of the coupling means, another advantage can be obtained within the scope of the application. From the counter reading, it can then be inferred that a communication signal, i.e. an output, is present. As a counter component, for example, a counter of the processing device is used.

[0029] It can alternatively be provided that the processing device is designed to work in different operating modes, which differ in the clock frequency of the processing device. Here, the sampling capability of the communication signal can depend on the clock frequency. It can therefore be necessary in accordance with the clock frequency that the sampling of the fed-back communication signal is carried out by the processing device in the form of subsampling. The operating modes can include, for example, a normal operating mode and an energy-saving mode, wherein the processing device, for example, works in the energy-saving mode with a clock frequency of 2 MHz. In the normal operating mode, the processing device can work, for example, with a clock frequency of 16 MHz.

[0030] It is also advantageous if the coupling means have a coupling resistance for feeding back the filtered, in particular low-pass filtered, communication signal to the processing device. The coupling means can for this purpose also have a coil or a capacitor, but advantageously use an input capacitor, which can be electrically connected to an input of the processing device for forwarding the communication signal. This also allows interference to be eliminated when detecting the communication signal output detection. The coupling resistance is in particular an ohmic resistance.

[0031] According to another possible way it can be provided that the coupling mechanism has a coupling resistance which is electrically connected to the input of the processing device to form a filter, in particular a low-pass filter, together with an input capacitance of the input. The input can be a port, for example, and the input capacitance can be a port capacitance, which together with the coupling resistance can have a low-pass effect. In the case of a filter, the limit frequency is in the range of 15 to 20 MHz, for example. This allows a gating region for the communication signal frequency, in particular the NFC frequency of 13.56 MHz. The communication mechanism output, in particular the TX output terminal, of the output communication signal can be very low-ohmic here, for example, only in the range of 2 Ohm. The coupling resistance can have a resistance value in the range of 680 Ohm, for example, and the input capacitance is 15 pF, for example. It is thus possible to provide a filter for the detection of the communication signal output at low technical cost.

[0032] It can be provided, for example, that the coupling mechanism has a coupling resistance which is adapted to an input capacitance of the input of the processing device. The adaptation is made, for example, analogously, i.e. the frequencies of the communication signal are gated for the input, while other frequencies are attenuated, in particular a low-pass effect is obtained.

[0033] The subject of the application is also a method for activating behavior detection and for communication at a vehicle. It is provided here that the following steps are preferably carried out in succession or in any order, wherein the steps can also be carried out repeatedly:

[0034] - a repeated output of an electrical communication signal by the communication mechanism via the transmitting communication mechanism to provide a communication,

[0035] - a detection of an activating behavior by the sensor assembly,

[0036] - a detection of the communication signal output by the electronic processing device of the sensor assembly via the coupling mechanism, wherein the coupling mechanism is electrically connected to the transmitting communication mechanism.

[0037] The method of the application thus has the same advantages as explicitly described with regard to the device of the application. In addition, it can be provided within the scope of the application that the method steps are carried out by the device of the application. BRIEF DESCRIPTION OF DRAWINGS

[0038] Further advantages, features and details of the application result from the following description of embodiments of the application with reference to the drawings. Herein, the features mentioned in the claims and the specification can be important to the application both individually and in any combination, wherein:

[0039] Figure 1 schematic diagram showing parts of the device of the application,

[0040] Figure 2Another schematic diagram showing parts of the inventive device mounted on a vehicle,

[0041] Figure 3 A schematic diagram showing the inventive method for displaying. DETAILED DESCRIPTION

[0042] In the following figures identical technical features of different embodiments are also provided with identical reference signs.

[0043] Figure 1 A device 10 according to the invention for capacitive detection 260 of an activation behavior and for communication at a vehicle 1 is shown. The inventive device 10 can here have as a circuit assembly for example at least or exactly one printed circuit board on which the components of the device 10 are fixed.

[0044] Figure 2 The inventive device 10 is shown in a state integrated in a vehicle 1. Here, the device 10 can for example be mounted in a door handle 2 to provide a communication area 150 for communication with the door handle 2. The communication can be limited to the communication area 150 in this case, so that for example only in the vicinity of the vehicle 1 can be achieved.

[0045] Furthermore, the components of the inventive device 10 are shown in further detail in Figure 1 A communication mechanism 100 can be provided for repeatedly outputting 160 an electrical communication signal 20 via an electrical transmission communication mechanism 110 in order to provide communication thereby. In this way, a communication area 150 can be generated, in particular by outputting 160 the communication signal 20 to a communication element 120. The communication element 120 is for example designed as a communication antenna 120, in particular as an NFC antenna coil. The output 160 of the communication signal 20 can thus result in an alternating magnetic field in the area around the communication element 120 which can be used for near field communication.

[0046] In addition, a sensor assembly 200 can be provided for detecting 260 an activation behavior in order to for example detect an activation behavior in the form of approaching the door handle 2. The approach can also be detected for example in the communication area 150.

[0047] A coupling mechanism 300 is also provided which is electrically connected to the transmission communication mechanism 110. The coupling mechanism 300 can be a branch of the transmission communication mechanism 110 in order to electrically feed back the communication signal 20 partially to an electronic processing device 210 of the sensor assembly 200. The processing device 210 which is electrically connected to the coupling mechanism 300, in particular directly via an input 240, can in this way detect the output 160 of the communication signal 20 by means of the coupling mechanism 300.

[0048] In an alternative design, the sensor assembly 200 may be designed as a capacitive sensor having at least one conductive sensor electrode 220 to perform detection 260 in the form of capacitance detection 260 via the sensor electrode 220. Here, the sensor electrode 220 may be arranged adjacent to the communication element 120 for communication of the communication mechanism 100. However, correspondingly, the communication signal 20 output 160 to the communication element 120 may also cause interference to the detection 260. Therefore, the processing device 210 may be designed to receive a portion of the communication signal 20 via the coupling mechanism 300 to detect a conflict 265 between communication and detection 260, so as to stop detection 260 when a conflict 265 is detected.

[0049] Processing device 210 is designed to perform frequency evaluation of communication signal 20 via coupling mechanism 300 using subsampling of communication signal 20. It is possible that communication mechanism 100 can be designed to time-repeatedly output communication signal 20 having a frequency substantially 13.56 MHz and / or a signal duration in the range of 40 μs and / or an interval in the range of 100 ms. Therefore, subsampling may be necessary, especially when processing device 210 is designed to operate in multiple modes that differ from each other in terms of the clock frequency of processing device 210. Processing device 210 may have a counter component 230 to perform frequency evaluation of communication signal 20 via coupling mechanism 300.

[0050] Furthermore, the coupling mechanism 300 may have a coupling resistor 310 to feed the filtered communication signal 20 back to the processing device 210. In this case, the coupling resistor 310 may be electrically connected to the input port 240 of the processing device 210 so as to use the input capacitance of the input port 240 to form a filter.

[0051] from Figure 3 As seen in the exemplary curve of communication and detection 260 with respect to time t, the processing device 210 can be designed to repeatedly initiate detection 260 in parallel with the repeated output 160 of communication signal 20, and to identify the detection 260 overlapping with output 160 as a conflict 265 (see reference numeral 265) based on the portion of communication signal 20 fed back through coupling mechanism 300.

[0052] The above explanation of the embodiments describes the invention only within the scope of examples. Clearly, the various features of the embodiments can be freely combined with each other as long as they are technically meaningful, without departing from the scope of the invention.

[0053] List of reference numerals

[0054] 1 vehicle

[0055] 2 Door handles

[0056] 10 devices

[0057] 20 communication signal

[0058] 100 communication means

[0059] 110 transmitting communication means

[0060] 120 communication element, communication antenna, NFC coil

[0061] 150 communication area

[0062] 160 output, NFC measurement

[0063] 200 sensor assembly

[0064] 210 processing device

[0065] 220 sensor electrode

[0066] 230 counter component

[0067] 240 input port

[0068] 260 detection

[0069] 265 collision

[0070] 300 coupling means

[0071] 310 resistive element, coupling resistor

[0072] t time

Claims

1. A device (10) for detecting (260) activation behavior and for communication at a vehicle (1), characterized in that, have: -A communication mechanism (100) for providing communication by repeatedly outputting (160) electrical communication signals (20) through a transmitting communication mechanism (110), -A sensor assembly (200) for detecting the activation behavior (260), - The coupling mechanism (300) is electrically connected to the transmitting communication mechanism (110). - The electronic processing device (210) of the sensor assembly (200) is electrically connected to the coupling mechanism (300) to detect the output (160) of the communication signal (20) through the coupling mechanism (300), wherein the electronic processing device (210) is designed to receive a portion of the communication signal (20) through the coupling mechanism (300) to detect a conflict between the communication and the detection (260) so as to stop the detection (260) when the conflict is detected.

2. The device (10) according to claim 1, characterized in that, The communication mechanism (100) is designed to perform near-field communication via a communication element (120), wherein, for this purpose, the transmitting communication mechanism (110) is designed to be electrically connected to the communication element (120) to transmit the communication signal (20) to the communication element (120) and generate a communication area (150) for near-field communication.

3. The apparatus (10) according to claim 1 or 2, characterized in that, The sensor assembly (200) is designed as a capacitive sensor having at least one conductive sensor electrode (220) for performing detection (260) in the form of capacitance detection (260) by means of the sensor electrode (220), wherein the sensor electrode (220) is arranged adjacent to a communication element (120) for communication of the communication mechanism (100).

4. The device (10) according to claim 1, characterized in that, The electronic processing device (210) is designed to receive a portion of the communication signal (20) via the coupling mechanism (300) and evaluate it by means of subsampling in order to detect the output (160) of the communication signal (20).

5. The apparatus (10) according to claim 1, characterized in that, The communication mechanism (100) is designed to output the communication signal (20) in a time-repeated manner at a frequency of approximately 13.56 MHz and / or at intervals in the range of 10 to 80 μs.

6. The apparatus (10) according to claim 1, characterized in that, The electronic processing device (210) is designed to repeatedly initiate the detection (260) in parallel with the repeated output (160) of the communication signal (20), and to identify the detection (260) that overlaps with the output (160) as a conflict by means of the portion of the communication signal (20) fed back through the coupling mechanism (300).

7. The apparatus (10) according to claim 1, characterized in that, The electronic processing device (210) is designed to perform frequency evaluation of the communication signal (20) via the coupling mechanism (300).

8. The apparatus (10) according to claim 1, characterized in that, The electronic processing device (210) has a counter component (230) for performing frequency evaluation of the communication signal (20) via the coupling mechanism (300).

9. The apparatus (10) according to claim 1, characterized in that, The electronic processing device (210) is designed to operate in a variety of modes that differ from one another in terms of the clock frequency of the electronic processing device (210).

10. The apparatus (10) according to claim 1, characterized in that, The coupling mechanism (300) has a coupling resistor (310) to feed back the filtered communication signal (20) to the electronic processing device (210).

11. The apparatus (10) according to claim 1, characterized in that, The coupling mechanism (300) has a coupling resistor (310) electrically connected to the input port (240) of the electronic processing device (210) to form a filter together with the input capacitor of the input port (240).

12. The apparatus (10) according to claim 1, characterized in that, The coupling mechanism (300) has a coupling resistor (310) adapted to the input capacitance of the input port (240) of the electronic processing device (210).

13. A method for detecting activation behavior (260) and for communication at a vehicle (1), characterized in that, Perform the following steps: - Communication is provided by the communication mechanism (100) through the transmission communication mechanism (110) performing repeated output (160) of the electrical communication signal (20). - The detection of the activation behavior is performed by the sensor assembly (200) (260). - The output (160) of the communication signal (20) is detected by the electronic processing device (210) of the sensor assembly (200) via a coupling mechanism (300), wherein the coupling mechanism (300) is electrically connected to the transmitting communication mechanism (110), wherein the steps of the method are performed by the device (10) according to any one of claims 1-12.

Images