Activating automatic parking operation by activating movement via a mobile communication device.

Abstract

One aspect of the present invention relates to a method for activating an automatic parking operation performed by a motor vehicle via a parking assistance system. The parking assistance system can be remotely controlled from outside the motor vehicle using a mobile communication device. The method includes the following steps: outputting a command via the mobile communication device to execute a predetermined activation movement of the mobile communication device on a user side; determining first sensor information sensitive to the activation movement of the communication device using a sensor system on the communication device side; detecting the activation movement of the mobile communication device performed using the mobile communication device based on the first sensor information; and activating the parking operation based on the detection of the activation movement of the mobile communication device.

Description

Technical Field

[0001] The present invention relates to a parking assistance system for performing automatic parking operations, which can be remotely controlled from outside the vehicle by means of a mobile communication device (e.g., a smartphone with appropriate smartphone software). Background Technology

[0002] As is well known, parking assistance systems controllable by mobile communication devices can be used for automated parking, such as parking in a front-end parking space (e.g., a single garage that can be driven into from the front). Here, the mobile communication device connects to the vehicle directly (e.g., via Bluetooth) or indirectly (e.g., via a cellular network) via radio. For example, if the vehicle is parked in front of a parking space, a user outside the vehicle can park the vehicle in the space by operating the mobile communication device. The system can be started and stopped, or the driving direction selected, for example, during each operation via a remote control. The parking assistance system automatically controls, for example, drive torque, service brakes, gear selection, and steering.

[0003] WO2013 / 053776A2 describes a remotely operated parking assistance system for automatically parking in a front parking space, wherein the remote control includes a control element for controlling forward movement and a control unit for controlling backward movement. If the vehicle is parked in front of the front parking space, the user can drive the vehicle, which has automatic longitudinal control and automatic lateral control, into the parking space from outside the vehicle by operating the control element for controlling forward movement.

[0004] Other automated parking assistance systems that can be controlled from outside the vehicle by mobile communication devices are described in documents DE102015209976A1, DE102015208123A1, DE102015208124A1 and DE10206226008A1.

[0005] For remote controls, whenever a commercially available smartphone with a touchscreen and a suitable mobile application (App) for controlling vehicle functions is used, it must be ensured that remote control via such a smartphone is secure. For example, incorrect input messages intended to execute driving functions should not be sent to the vehicle system if the user does not make the corresponding input on the touchscreen. Summary of the Invention

[0006] The purpose of this invention is to design a particularly safe automated parking process with a parking assistance system that can be remotely controlled (especially via a smartphone).

[0007] This objective is achieved through the features of the independent claim. Advantageous embodiments are described in the dependent claims. It should be noted that additional features of a claim dependent on an independent claim, even without the features of the independent claim or only in combination with a subset of the features of the independent claim, can constitute a separate invention independent of all combinations of features of the independent claim, which can be the subject of the independent claim, divisional application, or subsequent application. This also applies to the technical theories described in the specification, which can form an invention independent of the features of the independent claim.

[0008] A first aspect of the invention relates to a method for activating automatic parking operation of a motor vehicle (particularly a passenger car), the automatic parking operation being performed by a parking assistance system. The parking assistance system can be remotely controlled from outside the motor vehicle using a mobile communication device (particularly a smartphone). The method includes the following steps:

[0009] – Output instructions via a mobile communication device (e.g., on a touch-sensitive screen) to perform a predetermined activation movement of the mobile communication device on the user side (e.g., tilting the device to a specific position);

[0010] - Using sensor systems on the communication device side (e.g., accelerometers, gyroscopes, magnetometers), determine first sensor information (e.g., acceleration information, rotational speed information, magnetic field information) that is sensitive to the activation and movement of the communication device;

[0011] –Based on the information from the first sensor, the activation of mobile communication device movement performed by the mobile communication device is detected; and

[0012] –Activate parking operation based on the detection of active movement of mobile communication devices.

[0013] It can be stipulated that, upon detection of activated movement, the vehicle functions preparing for parking operations are initialized, such as releasing the parking brake and starting the drive engine. In order to initiate vehicle movement during parking operations, in addition to the activated movement already performed, further user actions (or the presence of other conditions) may be required, such as touching the screen of a smartphone used for remote control in a predetermined manner (e.g., performing a predetermined circular movement on the screen or touching the screen in a predetermined area).

[0014] Advantageously, before outputting instructions to activate the mobile communication device, the user needs to perform one or more actions on the mobile communication device, such as launching an application on the smartphone, selecting the parking function in the application, selecting the parking operation provided by the application, or pressing a predetermined area on the smartphone screen (“Continue”).

[0015] The method according to the invention is based on the idea that the user must perform a predetermined activation gesture using a mobile communication device to activate the parking operation, for example, by tilting the smartphone in a predetermined manner. This greatly reduces the possibility of unintended activation of the parking operation, and, based on the complexity of the activation gesture, almost eliminates this possibility.

[0016] It is generally known in the prior art that during automatic parking operations, sensor information (such as an acceleration sensor) is determined using a sensor system on the smartphone side to improve safety, and the continuation of the parking operation depends on the detected sensor information. Here, the sensor information is preferably transmitted to a parking assistance system on the vehicle side, which influences the execution of the parking operation based on the sensor information. For example, if the acceleration information detected during the parking operation indicates that the smartphone has been dropped or is violently shaken during the parking operation, the parking assistance system can immediately stop the parking operation.

[0017] If such a method is also provided in the application of this invention, the activation move to be performed can be used for two purposes simultaneously:

[0018] 1. As described above: According to the present invention, security is improved by making the activation of parking operations dependent on the activation of movement by a mobile communication device.

[0019] 2. In addition: verify the functionality of the sensor system on the communication equipment side, and, if necessary, correctly provide sensor information to the parking assistance system via direct or indirect communication links.

[0020] Therefore, if during automatic parking operation, a second sensor information (e.g., acceleration information) of the same type as the first sensor information (e.g., acceleration information) is determined by means of a sensor system (e.g., an acceleration sensor) on the communication device side, and the execution of the parking operation depends on the second sensor information, then activating movement serves two purposes simultaneously.

[0021] The predetermined activation movement preferably includes a tilt movement, preferably around an axis that extends horizontally (or vertically) parallel to the smartphone screen, provided that the relevant application on the smartphone is a portrait (or landscape) format application.

[0022] Predetermined activation movements advantageously include tilting movements to a predetermined position. It is not necessary to identify such tilting movements (e.g., by evaluating the rotational speed information of the integrated gyroscope). For example, meeting certain criteria is sufficient for reaching the predetermined position.

[0023] Activating the movement preferably involves tilting the smartphone to a first position in which the smartphone's screen plane is substantially parallel to the ground and the screen is located on the side of the smartphone facing away from the ground. It can be specified that the user does not necessarily have to tilt the smartphone to the first position, but a position prior to the first position is acceptable (e.g., an angle of 20° between the screen plane and the ground).

[0024] Alternatively or additionally, activating the movement involves tilting the smartphone to a second position in which the smartphone's screen plane is substantially perpendicular to the ground, particularly when the application is in portrait format and the height of the smartphone screen extends perpendicular to the ground (with the top of the smartphone facing upwards). It can be specified that the user does not necessarily have to tilt the smartphone to the second position, but a position prior to the second position is already acceptable (e.g., an angle of 70° between the screen plane and the ground).

[0025] Advantageously, activating the movement involves at least two partial movements: tilting to a first position and then tilting to a second position, or vice versa. It is conceivable that the smartphone must first be tilted to the first or second position, and then tilted to the corresponding other position, depending on the initial orientation of the smartphone.

[0026] In this case, it is also possible to consider that the activation movement includes, for example, at least three partial movements, such as tilting to a first position, then tilting to a second position, and then tilting back to the first position (or alternatively, tilting to a second position, then tilting back to the first position, and then tilting back to the second position).

[0027] The steps for outputting the instructions to activate the move can include at least two sub-steps, for example:

[0028] - Before tilting to the first position, output a command to tilt the smartphone to the first position; and

[0029] - Before tilting to the second position, output the instruction to tilt the smartphone to the second position.

[0030] In a preferred embodiment, the smartphone includes:

[0031] – An X-axis acceleration sensor is used to determine X-axis acceleration information in the X direction, which extends parallel to the width of the screen.

[0032] – A Y-direction acceleration sensor is used to determine Y-direction acceleration information in the Y direction, which extends parallel to the height of the screen.

[0033] – A Z-axis acceleration sensor is used to determine Z-axis acceleration information in the Z direction orthogonal to the screen plane.

[0034] In this case, the detection of activation movement is divided into at least two parts:

[0035] 1. Detecting the smartphone tilted to a first position, wherein the steps for detecting the tilt to the first position include:

[0036] a. Check whether the acceleration information in the Y direction meets the first criterion (e.g., the acceleration measured in the Y direction is less than or equal to the first threshold a). low This is especially true for time periods that are consistently greater than or equal to a time threshold (e.g., 1 second); and

[0037] b. Verify whether the acceleration information in the Z direction meets the second criterion (e.g., the acceleration measured in the Z direction is greater than or equal to the first threshold a). up ), especially for periods of time that are greater than or equal to a time threshold (e.g., 1 second), and

[0038] 2. Detecting the smartphone tilted to a second position, wherein the steps for detecting the tilt to the second position include:

[0039] a. Check whether the acceleration information in the Y direction meets the second criterion (e.g., the acceleration measured in the Y direction is greater than or equal to the first threshold a). up This is especially true for time periods that are consistently greater than or equal to a time threshold (e.g., 1 second); and

[0040] b. Verify whether the acceleration information in the Z direction meets the first criterion (e.g., the acceleration measured in the Z direction is less than or equal to the first threshold a). low This is especially true for time periods that are consistently greater than or equal to a time threshold (e.g., 1 second).

[0041] If the smartphone only needs to be placed in one of the two positions within the scope of active movement, then only one of the two partial detections 1 and 2 above will be performed.

[0042] In principle, for the benefit of improving safety, the detection of activation movement is not performed by the smartphone itself, but by transmitting the first sensor information detected by the smartphone to the parking assistance system on the vehicle side via a wireless communication link (e.g., via Bluetooth or a mobile network, and in the second case, via an intermediate back-end server if necessary). The parking assistance system on the vehicle side then performs the detection of activation movement based on the transmitted first sensor information.

[0043] The second aspect relates to a vehicle-side parking assistance system (remotely from outside the vehicle via a mobile communication device) that can be remotely controlled for performing automatic parking operations, wherein the parking operation is activated based on the activation movement of a predetermined user side of the mobile communication device.

[0044] The system is configured to perform the various activities described below. This is typically accomplished by means of one or more electronic controllers, which are controlled by one or more software programs and operate in accordance with the invention.

[0045] The parking assistance system according to the present invention is configured to,

[0046] - Receive first sensor information determined by a sensor system on the communication device side that is sensitive to activation movement.

[0047] –Based on the information from the first sensor, the activation and movement of the mobile communication device are detected, and

[0048] - Activate parking operation based on the detection of active movement.

[0049] The foregoing description of the inventive method according to the first aspect of the invention is also applicable in a corresponding manner to the parking assistance system according to the second aspect of the invention. Advantageous embodiments of the parking assistance system according to the invention, not expressly stated herein and in the claims, correspond to advantageous embodiments of the inventive method described above or in the claims.

[0050] A third aspect of the invention relates to software having program code for a software-controlled vehicle-side parking assistance system, wherein when the software is run on the software-controlled vehicle-side parking assistance system, the program code is used to perform one or more steps of the method according to the first aspect of the invention.

[0051] The software of the vehicle-side parking assistance system is used, for example, to perform the following steps according to the method of the present invention:

[0052] –Based on the information from the first sensor, the activation and movement of the mobile communication device performed by the mobile communication device are detected; and

[0053] –Activate parking operation based on the detection of active movement of mobile communication devices.

[0054] The fourth aspect of the invention relates to software having program code for a software-controlled mobile communication device, particularly (provided through a digital sales platform for various applications) for a smartphone, wherein when the software is run on the software-controlled mobile communication device, the program code is used to perform one or more steps of the method according to the first aspect of the invention.

[0055] Software for mobile communication devices, for example, is used to perform the following steps according to the method of the present invention:

[0056] – The mobile communication device outputs instructions to enable the user to perform a pre-defined activation of the mobile communication device; and

[0057] – Using a sensor system on the communication device side, determine first sensor information that is sensitive to the activation and movement of the communication device. Attached Figure Description

[0058] The present invention will now be described with reference to the accompanying drawings and embodiments. Wherein:

[0059] Figure 1 An exemplary flowchart of the method according to the present invention is shown;

[0060] Figure 2 An exemplary screen output on a smartphone is shown; and

[0061] Figure 3 An exemplary sensor signal from a smartphone accelerometer is shown. Detailed Implementation

[0062] exist Figure 1 The diagram illustrates an exemplary flowchart of a method for activating automatic parking operation according to the present invention. The parking assistance system can be remotely controlled from outside the vehicle using a smartphone. An application is installed on the smartphone for remotely controlling the parking assistance system.

[0063] In step 100, the user makes an operation selection via a smartphone. Figure 2 Figure a illustrates an exemplary user interface for operation selection displayed in a portrait format on a smartphone touchscreen. In this parking scenario, two available parking spaces, P1 and P2, are provided for the user to choose from. If the user selects the parking operation and touches the "Continue" operation panel 300, the parking operation will be ready to be activated.

[0064] Therefore, in step 110, a command is issued to the user via the smartphone to tilt the smartphone to a first horizontal position parallel to the ground with the screen side facing upwards. The corresponding screen output on the smartphone is as follows: Figure 2 As shown in b (see the smartphone's horizontal position and the arrow indicating tilt movement). The instruction to tilt the smartphone to a horizontal position can also be animated. In the case of multiple parts moving (tilting to a horizontal position here and then tilting to a vertical position later), the animation can show the entire movement or only the first part of the movement.

[0065] In step 120, acceleration information is detected in the smartphone using an accelerometer on the smartphone side and transmitted to the parking assistance system on the vehicle side via a wireless communication link (e.g., Bluetooth).

[0066] The accelerometer sensor system on the smartphone side includes:

[0067] – An X-axis acceleration sensor is used to determine the X-axis acceleration a in the X direction parallel to the width extension of the screen. x ,

[0068] – A Y-direction acceleration sensor is used to determine the Y-direction acceleration a in the Y-direction, which extends parallel to the height of the screen. y ,and

[0069] – A Z-axis acceleration sensor is used to determine the Z-axis acceleration 'a' in the Z-direction orthogonal to the screen plane. z .

[0070] The acceleration also takes into account the gravitational acceleration g, meaning the accelerometer also senses gravitational acceleration. Therefore, when the sensor's measurement direction is parallel to the gravitational acceleration, a stationary accelerometer will always display 1g (≈9.81 m / s²). 2 ) acceleration.

[0071] In step 130, the parking assist system on the vehicle side checks whether the smartphone has been tilted to a horizontal position.

[0072] To detect a smartphone tilted towards a horizontal position, the following will be examined:

[0073] a) Acceleration in the Y direction a y Is it less than the lower threshold a? low (a low <0.5g, for example, a low =0.1g)(i.e., a y <a low More precisely, the uninterrupted period of time that lasts longer than the time threshold ΔT, and

[0074] b) Acceleration in the Z direction a z Is it greater than the upper limit threshold a? up (a up >0.5g, for example, a up =0.9g)(i.e., a z >a up More precisely, it refers to the continuous period of time that is longer than the time threshold ΔT.

[0075] If both conditions a) and b) are met, then the smartphone is detected to be tilted to a horizontal position. Figure 3The figure shows the Y-direction acceleration α in the Y-direction extending parallel to the screen height. y and the acceleration a in the Z direction perpendicular to the screen plane. z An example curve is shown. Before time point t1, the user holds the smartphone at an angle in front of them, so that the user looks at the screen from an obliquely upward angle. At time point t1, the user begins to tilt the smartphone (tilting about an axis substantially parallel to the lateral extension of the smartphone screen) to a roughly horizontal position (screen facing away from the ground). The acceleration a in the Y direction is... y It decreases towards zero, and the acceleration a in the Z direction decreases. z It increases in the direction of 1g. At time point t2, it is confirmed that the acceleration a in the Y direction occurs during a continuous time interval greater than ΔT. y Less than the lower threshold a low And the acceleration a in the Z direction z Greater than the upper limit threshold a up This indicates that the smartphone has been tilted to a near-horizontal position (screen facing away from the ground).

[0076] If in Figure 1 If no horizontal position is detected in step 130, the process will continue to check whether a horizontal position has been reached until a predetermined time has elapsed (see query 140 "Timeout").

[0077] If a horizontal position is detected in step 130, then in step 150, a command is issued to the user to tilt the smartphone to a vertical position (top of the smartphone upwards). The corresponding screen output on the smartphone is as follows. Figure 2 As shown in c (see the smartphone's vertical position and the arrows indicating tilted movement).

[0078] In step 160, as in step 120, acceleration information is detected in the smartphone using the smartphone-side acceleration sensor system and transmitted to the vehicle-side parking assistance system via a wireless communication link (e.g., Bluetooth).

[0079] In step 170, the parking assist system on the vehicle side checks whether the smartphone has been tilted to a vertical position.

[0080] To detect when a smartphone is tilted to a vertical position, the following will be checked:

[0081] c) Acceleration in the Y direction a y Is it greater than the upper limit threshold a? up More precisely, the uninterrupted time period that lasts longer than the time threshold ΔT, and

[0082] d) Z-direction acceleration a z Is it less than the lower threshold a? low (i.e., a)z >a up More precisely, it refers to the continuous period of time that is longer than the time threshold ΔT.

[0083] If both conditions c) and d) are met, then the smartphone is detected to be tilted to a vertical position.

[0084] exist Figure 3 At time t3, the user begins to tilt the smartphone from a horizontal position to a vertical position. The acceleration a in the Y direction... y It decreases towards zero, and the acceleration a in the Z direction decreases. z It increases in the direction of 1g. At time point t4, it is confirmed that the acceleration a in the Y direction occurs within a time interval greater than ΔT. y Greater than the upper limit threshold a up And the acceleration a in the Z direction z Less than the lower threshold a low This indicates that the smartphone has been tilted to a near-vertical position.

[0085] If a vertical position is detected in step 170, the user has performed the entire predetermined activation movement, and the parking operation is activated. To this end, in step 180, the drive engine is first started, and the service brake is released. According to step 190, in order to begin movement within the scope of the parking operation, a safety button must also be pressed, which must be kept pressed during the parking operation to prevent interruption. Therefore, with the activation of the parking operation, area 310 is marked on the smartphone screen (see...). Figure 2 d), which is used as a safety button and must be continuously touched by the user.

[0086] In addition, during the parking operation, the acceleration a in the X direction is... x Y-direction acceleration a y and acceleration a in the Z direction z The parking assist system periodically transmits data to the vehicle. The continuation of the parking operation depends on the transmitted acceleration information. For example, if the transmitted acceleration information indicates that the smartphone has been dropped or is shaking violently during the parking operation, the parking assist system will immediately stop the parking operation.

[0087] The detection of active movement via the smartphone's accelerometer system is also used to verify the functionality of the smartphone-side accelerometer system and to ensure that acceleration information is correctly provided to the parking assistance system via the communication link before the parking operation.

[0088] In this embodiment, for the detection of activation gestures, only the Y-direction acceleration a was evaluated. y and acceleration a in the Z direction zHowever, it is also worth considering that for the detection of the two tilt-activated gestures mentioned above, an X-direction acceleration a could be used. x The requirement is to also test the X-direction acceleration sensor (e.g., during the entire two-part tilt gesture). x low Alternatively or additionally, tilt-activated gestures can be extended to detect changes in the X-axis accelerometer signal to verify the X-axis accelerometer (e.g., tilting the smartphone to a horizontal orientation).​

Claims

1. A method for activating an automatic parking operation performed by a motor vehicle, the parking operation being executed via a parking assistance system, wherein the parking assistance system can be remotely controlled from outside the motor vehicle by means of a mobile communication device, the method comprising the following steps: – The mobile communication device outputs (110) instructions to perform a predetermined activation movement of the mobile communication device on the user side; – Using a sensor system on the communication device side, determine (120, 160) the first sensor information (a) sensitive to the activation movement of the communication device. y a z ); –Based on the information from the first sensor (a) y a z The detection (130, 170) utilizes the activation movement of the mobile communication device performed by the mobile communication device; Furthermore, if the activated movement to the mobile communication device is detected, the parking operation is activated; – After the parking operation is activated and during the parking operation, a second sensor information with the same information type as the first sensor information is determined by means of the sensor system on the communication device side; and – The parking operation is performed based on the information from the second sensor.

2. The method of claim 1, wherein the predetermined activation movement includes tilting movement of the mobile communication device.

3. The method according to claim 1 or 2, wherein the communication device is a smartphone with a touch-sensitive screen.

4. The method of claim 3, wherein the activation movement comprises tilting the smartphone to a first position in which the screen plane of the smartphone is substantially parallel to the ground.

5. The method of claim 4, wherein the activation movement comprises tilting the smartphone to a second position in which the screen plane of the smartphone is substantially perpendicular to the ground.

6. The method of claim 5, wherein the activation movement comprises tilting to the first position and then tilting to the second position, or tilting to the second position and then tilting to the first position.

7. The method of claim 6, wherein the step of outputting the instruction for performing the activated movement comprises: – Before tilting to the first position, output (110) an instruction to tilt the smartphone to the first position; and – Before tilting to the second position, output (150) an instruction to tilt the smartphone to the second position.

8. The method according to claim 1 or 2, wherein the first sensor information (a y a z Acceleration information is detected using an accelerometer system.

9. The method according to any one of claims 4 to 7, wherein the first sensor information (a y a z The information is acceleration information detected using an acceleration sensor system, wherein the smartphone includes: – An X-direction acceleration sensor is used to determine X-direction acceleration information in the X direction parallel to the width extension of the screen (a x ), –Y-direction acceleration sensor, used to determine Y-direction acceleration information in the Y-direction parallel to the height extension of the screen (a y ),and – A Z-direction acceleration sensor is used to determine Z-direction acceleration information in the Z direction orthogonal to the screen plane (a z ); and The steps for detecting active movement include: – Detecting the smartphone tilted to a first position, in which the screen plane of the smartphone is substantially parallel to the ground, wherein the step of detecting the tilt to the first position includes: a) Verify the Y-direction acceleration information (a) y Does it meet the first criterion, and b) Verify the Z-direction acceleration information (a) z Does it meet the second criterion, or – Detecting the smartphone tilted to a second position, in which the screen plane of the smartphone is substantially perpendicular to the ground, wherein the step of detecting the tilt to the second position includes: a) Verify the acceleration information in the Y direction (a) y Does it meet the third criterion, and b) Verify the Z-direction acceleration information (a) z Does it meet the fourth standard? 10. The method according to claim 1 or 2, further comprising the step of: – The first sensor information is transmitted to the parking assistance system on the vehicle side via a wireless communication link. The activation movement is detected on the parking assistance system side of the vehicle.

11. The method of claim 1 or 2, wherein the activation movement comprises at least two predetermined partial activation movements.

12. The method of claim 1 or 2, wherein the step of activating movement includes moving the mobile communication device to a predetermined location of the mobile communication device, and detecting the activation movement of the mobile communication device performed using the mobile communication device includes: – Examine the criteria related to reaching the predetermined location of the mobile communication device within the scope of the activated movement.

13. The method of claim 1, wherein the predetermined activation movement comprises tilting the mobile communication device to a predetermined position.

14. The method of claim 5, wherein in the second position, the height extension of the screen is substantially perpendicular to the ground.

15. The method of claim 9, wherein the first criterion is a time period that is continuously greater than or equal to a time threshold (ΔT).

16. The method of claim 9, wherein the second criterion is a time period that is continuously greater than or equal to a time threshold (ΔT).

17. The method of claim 9, wherein the third criterion is a time period that is continuously greater than or equal to a time threshold (ΔT).

18. The method of claim 9, wherein the fourth criterion is a time period that is continuously greater than or equal to a time threshold (ΔT).

19. A parking assistance system capable of being remotely controlled from outside a motor vehicle via a mobile communication device to perform an automatic parking operation, wherein the parking operation is activated based on a predetermined activation movement on the user side of the mobile communication device, wherein the parking assistance system is configured to: – Receive first sensor information (a) determined by a sensor system on the communication device side that is sensitive to the activated movement. y a z ), –Based on the information from the first sensor (a) y a z ) Detect the activation and movement of the mobile communication device. – If a detection of the activated movement is detected, then the parking operation is activated. – After the parking operation is activated and during the parking operation, a second sensor information with the same information type as the first sensor information is determined by means of the sensor system on the communication device side, and – The parking operation is performed based on the information from the second sensor.

20. A computer program product for a software-controlled vehicle-side parking assistance system, the computer program product having program code that, when the computer program product is run on the software-controlled vehicle-side parking assistance system, performs the method according to any one of claims 1 to 18.

21. A computer program product for a software-controlled mobile communication device, the computer program product having program code that, when the computer program product is run on the software-controlled mobile communication device, is used to perform the method according to any one of claims 1 to 18.

22. The computer program product of claim 21, wherein the software-controlled mobile communication device is a smartphone.

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