Method and system for data communication in a vehicle

Abstract

The present invention relates to a communication system (1) embedded in a vehicle, and to a communication method implemented in such a communication system. The communication system (1) comprises a set of computers (11 to 13) connected via a data bus (100). The set of computers comprises a first computer (11) including a first wireless communication interface (111) implementing a first wireless local area network (WLAN) and a second computer (12) including a second wireless communication interface (121) implementing a second wireless LAN. The first computer (11) includes a first router (101) and the second computer (12) includes a second router (102) implementing a set of data routing rules between a first wireless communication device (1001) and a second wireless communication device (1003). Figure 1

Description

Title of the invention: Method and system for communicating data in a vehicle Technical field

[0001] The invention relates to methods and systems for communicating data in a vehicle, in particular but not exclusively a motor vehicle. The invention also relates to a method and a system for routing data in a computer network of a vehicle. Technological background

[0002] Contemporary vehicles carry a large number of computers forming an on-board data communication network of the vehicle. Each of these computers ensures the control of one or more functions useful for driving the vehicle and / or for the pleasure of the journey, such as for example the management of driving assistance, anti-skid, electronic brake distribution or even the control of actuators to ensure the optimal operation of a combustion engine or even the control of the infotainment system, also called IVI system (from the English "In-Vehicle Infotainment" or in French "Infodivertissement embarké").

[0003] Some contemporary vehicles offer new applications for passengers, in particular to enhance the journey, such as gaming applications, for example networked, content sharing applications, for example video, etc. These applications are for example accessible from mobile communication devices (for example smart phones, or "smartphones" in English, or tablets) or from touch screens integrated into the vehicle, for example touch screens of rear seat entertainment systems, known as RSE systems (from the English "Rear-Seat Entertainment" or in French "rear seat entertainment"). For this purpose, these mobile communication devices connect to a local wireless network, for example of the Wifi® type, controlled by a computer of the vehicle which then acts as an on-board access point, also called a hotspot.This on-board access point sometimes complements one or more other on-board access points implemented by one or more other computers in the vehicle, for example for the implementation of particular services such as screen mirroring, according to which the content displayed on the screen of a mobile communication device connected in communication, for example wirelessly of the wifi® type, to the computer offering this service is duplicated on an on-board screen of the vehicle, this on-board screen being for example also controlled by this computer.

[0004] Certain limitations on the use of the services offered by the vehicle have been noted. For example, when a user shares the content displayed on the screen of his smartphone with an on-board screen of the vehicle using a wireless connection of the Wifi® type offered by a computer such as the IVI computer, the user then no longer has access to other applications requiring a wireless connection of the Wifi® type such as entertainment applications, in particular network games with other passengers of the vehicle. Summary of the present invention

[0005] An object of the present invention is to solve at least one of the problems of the technological background described above.

[0006] Another object of the present invention is, for example, to improve access to services requiring a connection to a wireless local network implemented in a vehicle.

[0007] According to a first aspect, the present invention relates to a communication system embedded in a vehicle, the system comprising a set of computers connected in communication via at least one data bus, the set of computers comprising a first computer comprising a first wireless communication interface configured to implement a first wireless local area network and a second computer comprising a second wireless communication interface configured to implement a second wireless local area network, characterized in that the first computer comprises a first router and the second computer comprises a second router,the first router and the second router each being configured to implement a set of data routing rules between a first wireless communication device belonging to the first wireless local area network and connected in wireless communication to the communication system via the first wireless communication interface and a second wireless communication device belonging to the second wireless local area network and connected in wireless communication to the communication system via the second wireless communication interface.

[0008] The implementation of two wireless local area networks via two computers of the vehicle's on-board system with routing solutions for data communication between devices connected to these different wireless premises, which makes it possible to route data packets associated with different services or containers implemented by the vehicle's computers. This allows a user to access several services in parallel such as screen mirroring and a game via a single mobile communication device connected in wireless communication with the vehicle.

[0009] According to a variant, the first router and the second router are each configured to implement a network address translation function, called NAT.

[0010] According to another variant, the first wireless local network and the second wireless local network each correspond to a Wifi® type network.

[0011] According to another variant, the first computer and the second computer are each configured to implement a virtual local area network for data communication between the first mobile communication device and the mobile communication device.

[0012] According to an additional variant, the second computer is configured to implement an interactive application for duplicating a screen of the second mobile communication device on an on-board screen of the vehicle and controlled by the second computer.

[0013] According to another variant, the first computer corresponds to a telematics control unit, called TCU, and the second computer corresponds to a computer configured to control an on-board infotainment system of the vehicle, called IVI computer.

[0014] According to an additional variant, the at least one data bus is an Ethernet type bus.

[0015] According to a second aspect, the present invention relates to a vehicle, for example of the automobile type, comprising a communication system as described above according to the first aspect of the present invention.

[0016] According to a third aspect, the present invention relates to a method for communicating data in the communication system as described above according to the first aspect of the present invention, the method comprising a step of routing data between the first wireless communication device belonging to the first wireless local area network and connected in wireless communication to the communication system via the first wireless communication interface and the second wireless communication device belonging to the second wireless local area network and connected in wireless communication to the communication system via the second wireless communication interface, the data routing being implemented by the first router and the second router.

[0017] According to a fourth aspect, the present invention relates to a computer program which comprises instructions adapted for executing the steps of the method according to the third aspect of the present invention, in particular when the computer program is executed by at least one processor.

[0018] Such a computer program may use any programming language, and be in the form of source code, object code, or intermediate code between source code and object code, such as in a partially compiled form, or in any other desirable form.

[0019] According to a fifth aspect, the present invention relates to a support computer-readable recording medium having recorded thereon a computer program comprising instructions for carrying out the steps of the method according to the third aspect of the present invention.

[0020] On the one hand, the recording medium may be any entity or device capable of storing the program. For example, the medium may comprise a storage means, such as a ROM memory, a CD-ROM or a microelectronic circuit type ROM memory, or a magnetic recording means or a hard disk.

[0021] Furthermore, this recording medium may also be a transmissible medium such as an electrical or optical signal, such a signal being able to be conveyed via an electrical or optical cable, by conventional or hertzian radio or by self-directed laser beam or by other means. The computer program according to the present invention may in particular be downloaded from an Internet-type network.

[0022] Alternatively, the recording medium may be an integrated circuit in which the computer program is incorporated, the integrated circuit being adapted to perform or to be used in performing the method in question. Brief description of the figures

[0023] Other characteristics and advantages of the present invention will emerge from the description of the particular and non-limiting exemplary embodiments of the present invention below, with reference to the appended figures 1 to 3, in which:

[0024] [Fig.l] schematically illustrates a communication system on board a vehicle, according to a particular exemplary embodiment of the present invention;

[0025] [Fig.2] illustrates a computer of the communication system of [Fig.l], according to a particular and non-limiting exemplary embodiment of the present invention.

[0026] [Fig.3] illustrates a flowchart of the different steps of a data communication method in the communication system of [Fig.l], according to a particular and non-limiting exemplary embodiment of the present invention. Description of examples of implementation

[0027] A method and a system for communicating data on board a vehicle will now be described in the following with joint reference to FIGS. 1 to 3. The same elements are identified with the same reference signs throughout the description which follows.

[0028] The terms "first(s)", "second(s)" (or "first(s)", "second(s)"), etc. are used in this document by arbitrary convention to enable different elements (such as operations, means, etc.) implemented in the embodiments described below to be identified and distinguished. Such elements may be distinct or correspond to a single element, depending on the embodiment.

[0029] According to a particular and non-limiting example of embodiment of the present invention, a vehicle communication system comprises a set of computers connected in communication via one or more data buses. The computers are for example connected to each other to form a wired network of the Ethernet type. The set of computers of the communication system forms the on-board network of the vehicle and notably comprises a first computer comprising a first wireless communication interface configured to implement a first wireless local area network, for example a first Wifi® network, and a second computer comprising a second wireless communication interface configured to implement a second wireless local area network, for example a second Wifi® network.The first wireless communication interface and the second wireless communication interface are configured to operate as an access point of the first wireless local area network and the second wireless local area network, respectively. The first computer corresponds, for example, to a telematics control unit, called TCU, and the second computer corresponds, for example, to an IVI computer controlling the infotainment system of the vehicle.The first computer further comprises a first router and the second computer a second router, the first router and the second router each being configured to implement a set of data routing rules for routing data exchanged between a first wireless communication device (e.g. a first smartphone) belonging to the first wireless local area network and connected in wireless communication to the communication system via the first wireless communication interface and a second wireless communication device (e.g. a first smartphone) belonging to the second wireless local area network and connected in wireless communication to the communication system via the second wireless communication interface.

[0030] [Fig. 1] schematically illustrates a communication system 1 of a vehicle, according to a particular and non-limiting exemplary embodiment of the present invention.

[0031] The vehicle corresponds for example to a vehicle with a thermal engine or to a hybrid vehicle with a thermal engine and one or more electric motors. The vehicle thus corresponds for example to a land vehicle, for example a car, a truck, a bus.

[0032] The communication system 1 illustrated in [Fig.l] corresponds to a part of a network of computers embedded in the vehicle. For the sake of illustration, the communication system of [Fig.l] comprises 3 computers 11, 12, 13, the communication system according to the invention not being limited to a system with 3 computers but extending to any number of computers greater than or equal to 2.

[0033] The calculators 11, 12, 13 correspond for example to calculators of the type ECU ("Electronic Control Unit") or more complex supercomputer type calculators, called HPC (from the English "High Performance Computer").

[0034] According to a particular embodiment, the first computer 11 corresponds for example to a telematic control unit, called TCU (from the English “Telematic Control Unit”), the second computer 12 to an IVI computer and the third computer 13 to another IVI computer. The second computer 12 and the third computer 13 correspond to two separate hardware computers or to a single computer, for example of the HPC type with for example 2 chips or 2 systems on chip (from the English “System on Chip”, called SOC).

[0035] The first computer 11, the second computer 12 and the third computer 13 are connected to each other via a backbone of Ethernet type (according to the ISO / IEC 802-3 standard), each computer 11, 12, 13 comprising one or more ports for communicating data between them via the data bus(es) forming the backbone. According to other exemplary embodiments, the computers 11, 12 and 13 are connected in communication via data buses of CAN (Controller Area Network), CAN FD (Controller Area Network Flexible Data-Rate), FlexRay (according to the ISO 17458 standard) or LIN (Local Interconnect Network).

[0036] The second computer 12 is for example configured to implement a screen mirroring service. The screen mirroring service is for example implemented via an application executed by the second computer 12, this application taking for example the form of a software module called an interactive application, also called an associated interactive widget allowing the implementation of the screen mirroring. The graphic content displayed on the screen of a mobile communication device (for example a smartphone) 1003 is transmitted via a connection connecting the mobile communication device 1003 to the second computer 12, which second computer 12 controls the display of this graphic content so that this graphic content is displayed on a screen 14 on board the vehicle.

[0037] The screen 14 corresponds for example to a touch screen corresponding for example to a screen of the LCD type (from the English “Liquid Crystal Display” or in French “Display à cristals liquide”), for example of the TFT type (from the English “Thin-Film Transistor” or in French “Transistor en film mince”), or OLED (from the English “Organic Light-Emitting Diode” or in French “Diode électroluminescente”). organic"). The screen 14 is for example connected in wired communication with the second computer 12, for example according to an LVDS type connection (from the English "Low Voltage Differential Signaling" or in French "Low Voltage Differential Transmission"). The screen 14 corresponds for example to the screen of the head unit of the vehicle, called HU (from the English "Head Unit").

[0038] The mobile communication device 1003 is connected in communication with the second computer 12 via a wireless connection via a second wireless communication interface 121 configured to implement a second wireless local area network, for example a local area network of the Wifi® type operating in the 5 GHz frequency band (according to IEEE 802.11a, 802.11b, 802.11g or 802.lin). According to this example, the second mobile communication interface implemented or controlled by the second computer 12 operates as an access point of the second wireless local area network (WLAN), the wireless communication device 1003 corresponding to a peripheral of the second wireless local area network.According to an alternative embodiment, the mobile communication device 1003 is connected in communication with the second computer 12 via a wired connection, for example of the USB type (from the English “Universal Serial Bus” or in French “Universal serial bus”).

[0039] According to an alternative embodiment, the second computer 12 further comprises a wireless communication interface of the Bluetooth® type 122.

[0040] The first computer 11 comprises a first wireless communication interface 111 operating as an access point of a first wireless local area network or as a peripheral of a wireless local area network created by an access point external to the vehicle and to which the vehicle connects via the first computer 11 and its first wireless communication interface 111. According to this example, the first computer corresponds to the TCU unit of the vehicle. The first wireless local area network is for example also of the Wifi® type operating in the 2.4 GHz and / or 5 GHz frequency band.

[0041] When the first wireless communication interface 111 operates as an access point to create the first wireless local area network, one or more mobile communication devices 1001, 1002 (e.g., one or more smartphones and / or tablets) connect in wireless communication to the vehicle via the first wireless communication interface 111 as peripherals of the first wireless local area network.

[0042] The third computer 13 is for example configured to control a rear seat entertainment system, called a RSE system, of the vehicle. For this purpose, the third computer controls the display of graphic contents (images, videos, graphic human machine interface (HMI) contents) on one or more screens 15, 16, by example touchscreens, connected in communication, for example wired via an LVDS link, to the third computer 13.

[0043] A virtual local area network, called VLAN 110 (from the English “Virtual Local Area Network”) is for example implemented by the first computer 11, the second computer 12 and the third computer 13, that is to say for example by respectively the TCU, the head unit HU and the RSE system, for example to connect in communication software applications (for example of the game or collaborative network type) implemented by respectively a first mobile communication device 1001 connected in wireless connection to the first wireless communication interface 111 and a second mobile communication device 1003 connected in wireless connection to the second wireless communication interface 121, or even by the second and third computers 12, 13, for example for the head unit HU and the RSE system.The first computer 11, the second computer 12 and the third computer 13 are thus configured for the implementation of one or more virtual premises, that is to say that these computers 11, 12, 13 each comprise a module, for example software, comprising instructions for the implementation of such a VLAN.

[0044] The communication of data between in particular the first mobile communication device 1001 and the second mobile communication device 1003 is for example implemented concomitantly with the communication of data between the second mobile communication device 1003 and the second computer 12 within the framework of screen duplication.

[0045] The implementation of VLANs makes it possible to guarantee a determined level of service by allocating a determined bandwidth to the VLAN, to improve the security of the data exchanged and to develop the architecture of the vehicle's communication system 1, for example to offer new services.

[0046] To enable the routing of the data communicated between the different components of the communication system 1 and the peripherals connected to the communication system 1, for example the first mobile communication device 1001 and the second mobile communication device 1003, the first computer 11 and the second computer 12 each comprise a router, for example implemented in the form of a software module or a hardware module.

[0047] The first computer 11 thus comprises a first router 101 implementing a set of routing rules for the routing of: - data from a component of a subnetwork controlled by the first computer 11, for example a peripheral of the first wireless local area network such as the first wireless communication device 1001 to another component of the communication system 1 such as the second computer 12, the third computer 13 or a component of a subnetwork controlled by this second computer 12 (for example a peripheral of the second wireless local area network such as the second mobile communication device 1003) or by this third computer 13; and - data from the second computer 12 and / or the third computer (and / or a component of a sub-network controlled by this second or third computer) to the first computer 11 or a component of a sub-network controlled by the first computer 11.

[0048] In the same way, the second computer 12 comprises a second router 102 implementing a set of routing rules for the routing of: - data from a component of a subnetwork controlled by the second computer 12, for example a peripheral of the second wireless local area network such as the second wireless communication device 1003 to another component of the communication system 1 such as the first computer 11, the third computer 13 or a component of a subnetwork controlled by this first computer 11 (for example a peripheral of the first wireless local area network such as the first mobile communication device 1001) or by this third computer 13; and - data from the first computer 12 and / or the third computer 13 (and / or a component of a sub-network controlled by this second or third computer) to the second computer 12 or a component of a sub-network controlled by the second computer 12.

[0049] According to a particular exemplary embodiment, any computer of the communication system 1 configured to implement a wireless local area network comprises such a router for routing data transmitted by or to a component of a subnetwork controlled by this computer.

[0050] The first router 101 and the second router 102 are each configured to implement a network address translation function, called NAT (Network Address Translation). According to an alternative embodiment, the first router 101 and the second router 102 are each configured to implement data routing without NAT.

[0051] The implementation of a NAT function by a reducer makes it possible to reduce the number of routing rules implemented by the router and the number of public IP addresses (from the English "Internet Protocol" or in French "Internet Protocol") used in the network or communication system 1 of the vehicle.

[0052] The table below provides an example of a routing table implemented by a router such as the first router 101.

[0053] [Tableauxl] Source Destination Mask Interface 192.168.10.0 192.168.0.0 255.255.255.0 192.168.0.1 192.168.0.0 192.168.10.0 255.255.255.0 192.168.10.1 192.168.0.0 224.0.0.251 oooo 192.168.10.1 192.168.10.0 224.0.0.251 oooo 192.168.0.1

[0054] Table 1 provides an example of a routing table with NAT.

[0055] The "source" column indicates the IP address of the source subnet of the data, the "destination" column the IP address of the destination subnet or device receiving the data, the "mask" column the mask of the destination subnet of the data and the "interface" column the output network interface that the device must use to send the received data to the next hop or to the final destination.

[0056] The address '192.168.10.0' corresponds for example to the address of the subnetwork formed by the computers 11, 12, 13; the address '192.168.0.0' corresponds for example to the address of the subnetwork corresponding to the first wireless local area network; the address '224.0.0.251' corresponds to the address of a device not shown in [Fig.l]; the address '192.168.10.1' corresponds to the address of the first computer 11 and the address '192.168.0.1' corresponds to the address of the first wireless communication interface 111.

[0057] According to a particular embodiment, the software and applications implemented by the computers 11, 12 and 13 are implemented according to a so-called containerization process according to which the software is packaged at the level of the computers 11, 12, 13 in the form of containers so as to group the software code with all the files, libraries and dependencies required for the software to be able to execute at the level of the computer. The containerization of the software allows simpler and faster deployment of new applications or software solutions in the communication system 1, for example to offer new services to the users of the vehicle.

[0058] The applications implemented by the computers 11, 12, 13 and / or the routing tables are for example updated via a wireless link according to OTA technology (from the English “Over The Air” or in French “par voie aérien”), for example via the first wireless communication interface 111 of the first computer, for example for the deployment of new functions or new services implemented by the communication system 1 of the vehicle.

[0059] [Fig.2] schematically illustrates a computer 2 of the on-board network of a vehicle, for example a computer of the communication system 1, according to particular and non-limiting exemplary embodiments of the present invention.

[0060] The device 2 is for example configured for the implementation of the operations described with regard to [Fig. 1] and / or the steps of the method described with regard to [Fig. 3]. Examples of such a device 2 include, but are not limited to, on-board electronic equipment such as an on-board computer of a vehicle, an electronic calculator such as an ECU (“Electronic Control Unit”), an HPE or a telematics control unit TCU. The elements of the device 2, individually or in combination, can be integrated in a single integrated circuit, in several integrated circuits, and / or in discrete components. The device 2 can be produced in the form of electronic circuits or software (or computer) modules or even a combination of electronic circuits and software modules.

[0061] The device 2 comprises one (or more) processor(s) 20 configured to execute instructions for carrying out the steps of the method and / or for executing the instructions of the software(s) embedded in the device 2. The processor 20 may include integrated memory, an input / output interface, and various circuits known to those skilled in the art. The device 2 further comprises at least one memory 21 corresponding for example to a volatile and / or non-volatile memory and / or comprises a memory storage device which may comprise volatile and / or non-volatile memory, such as EEPROM, ROM, PROM, RAM, DRAM, SRAM, flash, magnetic or optical disk.

[0062] The computer code of the embedded software(s) comprising the instructions to be loaded and executed by the processor is for example stored in the memory 21.

[0063] According to various particular and non-limiting embodiments, the device 2 is coupled in communication with other similar devices or systems and / or with communication devices, for example a TCU (from the English “Telematic Control Unit” or in French “Telematic Control Unit”), for example via a communication bus or through dedicated input / output ports.

[0064] According to a particular and non-limiting exemplary embodiment, the device 2 comprises a block 22 of interface elements for communicating with external devices. The interface elements of the block 22 comprise one or more of the following interfaces: - RF radio frequency interface, for example Wi-Fi® type (according to IEEE 802.11), for example in the 2.4 or 5 GHz frequency bands, or Bluetooth® type (according to IEEE 802.25.1), in the 2.4 GHz frequency band, or Sigfox type using UBN radio technology (from the English Ultra Narrow Band, in French ultra narrow band) narrow), or LoRa in the 868 MHz frequency band, LTE (from the English “Long-Term Evolution” or in French “Evolution à long terme”), LTE-Advanced (or in French LTE-advanced); - USB interface (from the English “Universal Serial Bus” or “Universal Serial Bus” in French); - HDMI interface (from the English “High Definition Multimedia Interface” or “High Definition Multimedia Interface” in French); - LIN interface (from the English “Local Interconnect Network”).

[0065] According to another particular and non-limiting exemplary embodiment, the device 2 comprises a communication interface 23 which makes it possible to establish communication with other devices (such as other computers of the on-board system) via a communication channel 230. The communication interface 23 corresponds for example to a transmitter configured to transmit and receive information and / or data via the communication channel 230. The communication interface 23 corresponds for example to a wired network of the CAN (Controller Area Network) type, CAN FD (Controller Area Network Flexible Data-Rate), FlexRay (standardized by the ISO 17458 standard) or Ethernet (standardized by the ISO / IEC 802-3 standard).

[0066] [Fig. 3] illustrates a flowchart of the different steps of a method for communicating data in the communication system as described with reference to [Fig. 1], according to a particular and non-limiting exemplary embodiment of the present invention. The method is for example implemented by a set of computers such as the first computer 11 and the second computer 12.

[0067] In a step 31, data is routed between the first wireless communication device belonging to the first wireless local area network and connected in wireless communication to the communication system via the first wireless communication interface and the second wireless communication device belonging to the second wireless local area network and connected in wireless communication to the communication system via the second wireless communication interface, the data routing being implemented by the first router and the second router. The data is routed from the first wireless communication device to the second wireless communication device and / or vice versa from the second wireless communication device to the first wireless communication device.

[0068] Of course, the present invention is not limited to the exemplary embodiments described above but extends to a data routing method and to a device and / or system configured for the implementation of such a method.

[0069] The present invention also relates to a vehicle, for example an automobile or more generally an autonomous land-based motor vehicle, comprising the communication system 1 of [Fig. 1] or one or more devices 2 of [Fig. 2].

Claims

Claims

1. Communication system (1) on board a vehicle, said communication system (1) comprising a set of computers (11 to 13) connected in communication via at least one data bus (100), the set of computers comprising a first computer (11) comprising a first wireless communication interface (111) configured to implement a first wireless local area network and a second computer (12) comprising a second wireless communication interface (121) configured to implement a second wireless local area network, characterized in that said first computer (11) comprises a first router (101) and said second computer (12) comprises a second router (102),said first router (11) and said second router (12) each being configured to implement a set of data routing rules between a first wireless communication device (1001) belonging to said first wireless local area network and connected in wireless communication to said communication system (1) via said first wireless communication interface (111) and a second wireless communication device (1003) belonging to said second wireless local area network and connected in wireless communication to said communication system (1) via said second wireless communication interface (121).,

2. Communication system according to claim 1, wherein said first router (11) and said second router (12) are each configured to implement a network address translation function, called NAT.

3. Communication system according to claim 1 or 2, for which said first wireless local area network and said second wireless local area network each correspond to a Wifi® type network.

4. Communication system according to one of claims 1 to 3, for which said first computer (11) and said second computer (12) are each configured to implement a virtual local area network for communication of said data between said first mobile communication device (1001) and said second mobile communication device (1003).

5. Communication system according to one of claims 1 to 4, for which said second computer (12) is configured to implement an interactive application for duplicating a screen of said second mobile communication device (1003) on a screen (14) on board said vehicle and controlled by said second computer (12).

6. Communication system according to one of claims 1 to 5, for which said first computer (11) corresponds to a telematics control unit, called TCU, and said second computer (12) corresponds to a computer configured to control an on-board infotainment system of said vehicle, called IVI computer.

7. Communication system according to one of claims 1 to 6, for which said at least one data bus (100) is an Ethernet type bus.

8. Vehicle (10) comprising the communication system (1) according to one of claims 1 to 7.

9. Method for communicating data in the communication system (1) according to one of claims 1 to 7, said method comprising a step of routing (31) said data between the first wireless communication device belonging to the first wireless local area network and connected in wireless communication to the communication system via the first wireless communication interface and the second wireless communication device belonging to the second wireless local area network and connected in wireless communication to the communication system via the second wireless communication interface, said data routing being implemented by the first router and the second router.

10. Computer program comprising instructions for implementing the method according to claim 9, when these instructions are executed by at least one processor.

Images