WO2017182597A1

WO2017182597A1 - Method for connecting an electronic appliance to a vehicle on-board system, associated electronic appliance and vehicle on-board system

Info

Publication number: WO2017182597A1
Application number: PCT/EP2017/059451
Authority: WO
Inventors: Laurent Petel
Original assignee: Valeo Comfort And Driving Assistance
Priority date: 2016-04-20
Filing date: 2017-04-20
Publication date: 2017-10-26
Also published as: FR3050594B1; FR3050594A1

Abstract

A method for connecting an electronic appliance (20; 120; 220) comprising a first wireless communication module to an on-board system (13) of a vehicle (10) comprising a second wireless communication module comprises the following steps: - transmission of a first data-including message frame by means of the second wireless communication module; reception of the message frame by the first wireless communication module; connection of the electronic appliance (20; 120; 220) to the on-board system (13) if the data corresponds to the electronic appliance (20; 120; 220). An associated electronic appliance and on-board system are also described.

Description

Method of connecting an electronic device to an on-board vehicle system, electronic apparatus and associated vehicle vehicle system TECHNICAL FIELD TO WHICH THE INVENTION RELATES

The present invention relates to the exchange of data between a system embedded in a vehicle and an external electronic device, such as a user terminal or a vehicle access badge.

It relates more particularly to a method of connecting an electronic device to an on-board vehicle system, and an associated electronic device and vehicle on-board system.

The invention applies particularly advantageously in the case where the embedded system can not connect simultaneously to several electronic devices.

BACKGROUND TECHNOLOGY

It has been proposed to control certain functions of a motor vehicle, such as unlocking or locking the doors and / or starting the vehicle, by means of a user terminal, for example a smartphone commonly used by the user of the vehicle. vehicle.

To do this, a communication module of the user terminal establishes a wireless communication, for example according to the Bluetooth Low Energy (BLE) protocol, with a corresponding communication module installed in the motor vehicle.

For various reasons (and in particular because some user terminals are designed to operate only as a master device, or as a central device, in the established communication), the vehicle communication module is generally configured as a slave device (or peripheral device). ).

This configuration of the vehicle communication module may however prevent it from establishing simultaneous connections with different user terminals (for example to send information to the different user terminals present in the vicinity of the vehicle), as is the case for example. example as part of the Bluetooth Smart protocol (Bluetooth Low Energy) in Bluetooth v4.0. OBJECT OF THE INVENTION

In this context, the present invention provides a method of connecting an electronic apparatus comprising a first wireless communication module to an on-board vehicle system comprising a second wireless communication module, comprising the steps of:

broadcasting, by means of the second wireless communication module, an advertisement frame including a datum;

- reception of the announcement frame by the first wireless communication module;

- Connection of the electronic device to the embedded system if said data corresponds to the electronic device.

Thus, the connection is made only when the second wireless communication module (equipping the vehicle) is broadcasting data corresponding to the electronic device, which allows the onboard system to designate the electronic device with which it wishes to establish a connection.

The onboard system can thus solicit in turn each of the electronic devices located in the vicinity of the vehicle to establish a connection (for example for the purpose of transmitting certain data to each of these electronic devices).

Other optional features that can be envisaged are the following:

the data is a binary field;

the data corresponds to the electronic device if a bit of the bit field assigned to the electronic device has a predetermined value or, alternatively, if the data is equal to a value (for example a number) assigned to the electronic device ;

- a bit index assigned to the electronic device is stored in a memory of the electronic device;

- A processor of the electronic device determines whether the bit assigned to the electronic device is equal to said predetermined value and controls the transmission, by the first wireless communication module, of a connection request in case of positive determination;

the bit field contains a single bit, having a first index, at said predetermined value; the method comprises a subsequent step of broadcasting, by the second wireless communication module, another advertisement frame containing a bit field with a single bit, having a second index distinct from the first index, at said predetermined value;

- the electronic device is a user terminal.

The invention also proposes an electronic apparatus comprising a processor and a wireless communication module able to receive an advertisement frame including a data item, characterized in that the processor is designed to determine whether said data corresponds to the electronic device and for controlling the transmission, by the wireless communication module, of a connection request in case of positive determination.

The data is for example a binary field; the processor can then be designed to determine whether a bit of the bit field assigned to the electronic device is worth a predetermined value and to control the transmission, by the wireless communication module, of a connection request in case of positive determination .

As already indicated in connection with the method, it can be provided for example that this electronic device comprises a memory storing a bit index assigned to the electronic device and / or that the bit field contains a single bit having said predetermined value.

The invention finally proposes an on-board vehicle system comprising an electronic control unit and a wireless communication module, characterized in that the electronic control unit is designed to control, for each of a plurality of electronic devices, broadcasting by the wireless communication module of at least one advertisement frame including a bit field in which (only) a bit assigned to the electronic device concerned has a predetermined value.

This electronic device and / or this embedded system may optionally furthermore comprise at least one of the characteristics mentioned above in terms of the method.

DETAILED DESCRIPTION OF AN EXEMPLARY EMBODIMENT The following description with reference to the accompanying drawings, given by way of non-limiting examples, will make it clear what the invention consists of and how it can be implemented. In the accompanying drawings:

FIG. 1 represents an example of context in which the invention can be implemented;

- Figure 2 schematically shows components, useful for understanding the invention, a vehicle and a user terminal;

FIG. 3 shows in the form of a logic diagram an example of a method implemented when the user terminal arrives in the vicinity of the vehicle;

FIG. 4 presents, in the form of a logic diagram, an exemplary method according to the invention; and

- Figure 5 shows in logic diagram form a possible operation when the user terminal issues a command for the vehicle.

FIG. 1 represents an example of context in which the invention can be implemented.

In this context, a vehicle 10 comprises an onboard system 13 which can communicate via a wireless link with each of a plurality of user terminals 20, 120, 220 present in the vicinity of the vehicle 10.

Each user terminal 20, 120, 220 may be for example a mobile phone (or cell phone), possibly of the "smart phone" type (or "smartphone" according to the English name commonly used).

Another type of electronic device (for example a key or a vehicle access badge 10) may however be used instead of at least one of said user terminals 20, 120, 220.

Thanks to the established wireless link, the on-board system 13 and the user terminal 20, 120, 220 concerned can exchange data with each other, for example with a view to controlling at least one feature of the vehicle 10 by means of the user terminal. 20, 120, 220 concerned. Such a feature is for example the unlocking of the doors of the vehicle 10.

The wireless link used to communicate between the onboard system 13 and the user terminal 20, 120, 200 concerned is for example Bluetooth type, here in particular Bluetooth Low Energy (BLE) type.

Each of the user terminals 20, 120, 220 may be furthermore designed to connect to a mobile network (not shown).

FIG. 2 diagrammatically represents components useful for understanding the invention of the vehicle 10 and the user terminal 20. The other user terminals 120, 220 shown in FIG. 1 are similar to the user terminal 20 and will therefore not be described in FIG. detail.

The vehicle 10 includes in particular the onboard system 13 already mentioned and an actuator 15 designed to implement the controlled functionality.

The embedded system 13 comprises an electronic control unit 1 1 (or ECU for "Electronic Control Unit) and a wireless communication module 1 6, here according to Bluetooth Low Energy (BLE).

The electronic control unit 11 comprises a processor 12 and a storage unit 14, for example a rewritable non-volatile memory or a hard disk.

The storage unit 14 stores, in particular, computer programs comprising instructions the execution of which by the processor 12 enables the electronic control unit 11 to carry out the processes described below with reference to FIGS. 4.

The storage unit 14 also stores data used in the context of the methods described below, in particular a secret key K and an association table T.

The secret key K is for example written in the storage unit 14 during the manufacture of the electronic control unit 1 1, before mounting of this electronic control unit 1 1 in the vehicle 10.

As explained below, the association table T associates an index i with each electronic device (here with each user terminal 20, 120, 220) present in the vicinity of the vehicle 10 (a user terminal 20, 120, 220 being for example represented in the association table T by the identifier ID of this user terminal). According to a variant mentioned below, the association table can associate a different number to each electronic device.

The user terminal 20 comprises a processor 22, a memory 24 (for example a non-volatile memory rewritable), a wireless communication module 26, here according to Bluetooth Low Energy (BLE) technology, a user interface 21 (here a screen touch) and a communication module 28 on the aforementioned mobile telephone network.

In some embodiments, the communication module 28 may include a smart card that stores connection data associated with a subscription to the mobile telephone service and for establishing the connection to the mobile telephone network.

The memory 24 stores the aforementioned secret key K (also stored as already indicated in the storage unit 14 of the electronic control unit 11 of the vehicle 10). The secret key K has been transmitted to the user terminal 20 in advance, for example during a subscription phase to the vehicle functionality control service by means of a user terminal, possibly using the aforementioned mobile telephone network.

When the user terminal 20 is in the vicinity of the vehicle 10, the memory 24 also stores (following a method such as that described below with reference to FIG. 3) an index n associated with the user terminal 20 concerned.

The wireless communication module 26 of the user terminal 20 makes it possible to establish a wireless link (here Bluetooth Low Energy type as already indicated) with the wireless communication module 1 6 of the vehicle 10 through which the processor 12 of the electronic control unit 11 and the processor 22 of the user terminal 20 can exchange data, as explained below.

The wireless communication module 1 6 of the vehicle 10 and the wireless communication module 26 of the user terminal 20 can each be in a broadcasting mode ("advertising" mode using Bluetooth technology) and / or in a scanning mode ("scanning" mode "in Bluetooth technology).

When a wireless communication module 1 6, 26 is in broadcast mode, it broadcasts ad frames (or "advertising packets" according to the English terminology) which can have one of the following types:

- ADV_NONCONN_IND (indicative frames of unavailability);

- ADVJND (indicative frames of indirect availability, that is to say, availability for a connection with any device);

- ADV_SCAN_IND (indicative frames of availability to answer an information request - see below - but unavailability for a connection);

- ADV_DIRECT (indicative direct availability frames).

When a wireless communication module 1 6, 26 is in scan mode, it can issue:

an information request (frame of SCAN_REQ type or "scan requesf according to the terminology used in the Bluetooth Low Energy protocol) intended for a device in broadcast mode so that this apparatus communicates additional information to it;

- a connection request (CONNECT_REQ frame or "requesf connection" according to the terminology used in the Bluetooth Low protocol

Energy) for a broadcast device to initiate a connection with this device.

When a wireless communication module 1 6, 26 in broadcast mode receives a request for information from a module in scan mode, the module in broadcast mode responds to this request by sending a response (frame type SCAN_RSP or "scan response" according to the terminology used in the Bluetooth Low Energy protocol) for the device in scan mode and containing the additional information.

As part of the Bluetooth Low Energy protocol, it is expected that the establishment frames of a connection (listed above) is exchanged within specific channels, called advertising channels (in English "advertising channels"), separate data channels (in English: "data channels") used to transmit the frames of exchange of application data relating to established connections.

Bluetooth Low Energy Protocol Provides 3 Announcement Channels

(referenced channel 37, channel 38 and channel 39 and having respective center frequencies equal to 2402 MHz, 2426 MHz, 2480 MHz) and 37 data channels (referenced channel 0 to channel 36).

Thus the 3 announcement channels respectively have central frequencies located at the lower end, in a central region and at the upper end of the frequency band concerned (here the 2.4 GHz band).

In the following examples, it is provided that the wireless communication module 26 of the user terminal 20 is configured as a master device (or central device) and / or operates in a scanning mode, while that the wireless communication module 1 6 of the embedded system 13 is configured as a slave device (or peripheral device) and / or operates in broadcast mode.

FIG. 3 presents in the form of a logic diagram an exemplary method implemented when an electronic device (here a user terminal 20, 120, 220) arrives in the vicinity of the vehicle 10. The case of the user terminal 20 is described here, but a similar method is implemented when the user terminal 120, 220, or another electronic device arrives in the vicinity of the vehicle 10.

When the distance between the user terminal 20 and the vehicle 10 allows data exchanges between the wireless communication module 26 of the user terminal 20 and the wireless communication module 1 6 of the vehicle 10 (typically because a user the user terminal 20 approaches the vehicle 10), a verification process is implemented between the electronic control unit 11 and the processor 22 (steps E2 and E4) via the wireless link mentioned above.

The electronic control unit 1 1 checks at least during the steps E2 and E4 that the user terminal 20 has a right of access to the vehicle 10 (or more generally a right to control the relevant feature), that is, that is, the user terminal 20 stores the secret key K already mentioned.

To perform this verification, a challenge-response algorithm (or "challenge-response" according to the Anglo-Saxon name) is for example implemented between the electronic control unit 1 1 and the processor 22: the unit control electronics 1 1 transmits a challenge to the processor 22, the processor 22 determines a response depending on the challenge and the secret key K (usually using a cryptographic algorithm combining the challenge and the secret key K) and the processor 22 transmits the response to the electronic control unit 1 1, which can thus verify the response (using in particular the secret key K stored in the storage unit 14). If the verification is carried out successfully, this proves that the user terminal 20 actually stores the secret key K.

The verification process of steps E2 and E4 also generally aims to authenticate the user terminal 20 by the vehicle 10. Such an authentication process may possibly allow authentication. of the electronic control unit 11 and the user terminal 20.

During the process of FIG. 3, the processor 22 also transmits an identifier ID of the user terminal 20 to the electronic control unit 11 of the vehicle 10 (step E6); the electronic control unit 11 receives the identifier ID in step E8.

It will be noted that the steps E6 and E8 are shown separately from the steps E2 and E4 in FIG. 3. In practice, the transmission of the identifier ID of the user terminal 20 could, however, be carried out during the aforementioned verification process (steps E2 and E4), in particular when this process allows authentication of the user terminal 20.

The electronic control unit 1 1 then assigns in step E10 an index n not used to the user terminal 20. As explained below, this index n designates a bit of a bit field F (or "bit field") , which bit is associated with the user terminal 20. The electronic control unit 1 1 thus controls the storage in the aforementioned table T of the index n in association with the identifier ID of the user terminal 20. In a possible variant, a number is assigned to the user terminal 20.

The electronic control unit 1 1 then transmits in step E12 the index n assigned to the processor 22 in step E10.

It will be noted that the various data exchanges implemented during the process of FIG. 3 between the electronic control unit 11 and the user terminal 20 (specifically its processor 22) are carried out by means of the wireless link established between the wireless communication module 1 6 of the vehicle 10 and the wireless communication module 26 of the user terminal 20.

The processor 22 receives in step E14 the index n assigned to the user terminal 20 (or, alternatively, the number assigned to the user terminal 20) and stores in step E1 6 this index n (or, alternatively, number) within the memory 24.

It is provided here that the assignment process just described above is implemented each time the electronic device approaches the vehicle and the assignment thus made lasts only as long as the device electronics is in the vicinity of the vehicle.

However, it could alternatively be envisaged that the assignment process takes place only at the first meeting between the electronic device and the vehicle and that the assignment be maintained thereafter.

FIG. 4 presents in the form of a logic diagram a method according to the invention implemented here between the vehicle 10 (precisely its electronic control unit 11) and the user terminal 20. A method of the same type is implemented between the vehicle 10 and each of the user terminals 120, 220 (or other electronic devices) present in the vicinity of the vehicle 10.

The method of FIG. 4 is for example initiated by the electronic control unit 1 1 when certain data (typically operating data) have been updated within the vehicle 10 and must be transmitted to each of the electronic devices (here the user terminals 20, 120, 220) present in the vicinity of the vehicle 10.

This data is for example state data, linked or not to a functionality controllable by the electronic devices (here the user terminals 20, 120, 220) via the aforementioned wireless link. This may for example be data representative of the state (locked or unlocked) of the vehicle door lock 10, or of the state (started or stopped) of the engine of the vehicle 10. It may be also act data indicating a state of default indicative of a malfunction of the vehicle 10.

These data may alternatively be measured data within the vehicle 10 (for example, tire inflation pressure values, a fuel gauge level value, an oil dipstick level value, a temperature value, etc.). of the motor).

In a variant, the method of FIG. 4 can be initiated periodically by the electronic control unit 11.

The method of FIG. 4 starts with a step E20 at which a current index i is initialized to the zero value (or, in general, to the index value designating the first bit of the aforementioned bit field F).

The electronic control unit 1 1 then controls at step E22 the transmission by the wireless communication module 1 6 of at least one advertisement frame ADV containing the bit field F, in which only the bit of current index i has been set to a predetermined value (for example to the value 1). (The wireless communication module 16 is for this purpose in broadcast mode.)

For example, if the bit field F used is a byte, the index value 0 designates the least significant bit, the index value 7 designates the bit of most significant and that the predetermined value is 1 (as indicated above), the bit field F is of the form 00000100 when the current index i is 2.

The advertisement frame ADV is for example a frame of type ADVJND (or alternatively a frame of type ADV_SCAN_IND). The binary field F is for example contained in one of the following fields of the ADV announcement frame: "Manufacturer specifies data", "Service exposure", "Service solicitation", "Service data".

The transmission (by the wireless communication module 1 6) of announcement frames ADV (F) containing such a bit field F continues as long as the electronic control unit 11 does not receive a connection request (such as as described below in step E32).

According to the variant already mentioned, the broadcast advertisement frames contain a number (for example equal to the current index i) in place of the binary field F.

The processor 22 of the user terminal 20 receives (via the wireless communication module 26 in scan mode) the advertisement frame ADV containing the bit field F (or alternatively the number) in the step E24.

The processor 22 can thus determine in step E26 whether the (only) bit having the predetermined value (here 1) in the bit field F is the bit having the index n associated with the user terminal 20 and stored in the memory 24. In the aforementioned variant, the processor 22 determines in this step if the number received corresponds to the number assigned to the user terminal 20 and stored in the memory 24.

If not, the processor 22 leaves the reception of the ADV announcement frame (step E28) without further action and, for example, waits for the reception of a subsequent announcement frame. (It is understood that this means that the bit field F then designates another electronic device than the user terminal 20, precisely an electronic device associated with the bit having the current index i.)

If yes in step E26 (i.e. if the bit having the value 1 in the bit field F is the index bit n associated with the user terminal 20), the processor 22 commands the module wireless communication 26 sending a CONNECT_REQ connection request to the wireless communication module 1 6 (step E30).

The wireless communication module 1 6 receives this request from connection CONNECT_REQ in step E32 and a connection (here in the sense of the BLE protocol) is then established between the wireless communication module 1 6 of the vehicle 10 and the wireless communication module 26 of the user terminal 20.

The electronic control unit 11 and the processor 22 can then exchange data via the established connection (i.e., using the data channels according to the BLE protocol, as explained above), as shown in FIGS. steps E34 and 36.

During steps E34 and E36, provision may be made beforehand for the processor 22 to transmit the identifier ID of the user terminal 20 to the electronic control unit 11 so that the electronic control unit 11 verifies that this identifier ID is the identifier associated with the current index i in the association table T stored in the storage unit 14. The electronic control unit 11 may then make it necessary for this verification to send data to its destination. the user terminal 20.

The electronic control unit 11 normally controls, during steps E34 and E36, the transmission (via the established connection) of the updated data (for example, state data or measured data as mentioned above). to the processor 22 of the user terminal 20.

Once these data have been exchanged, the electronic control unit 11 (or the processor 22) controls the closure of the established connection (steps E38 and E39), for example by means of a particular frame whose data is a code of TERMINATE type control, so that the wireless communication module 1 6 is available for connection to another electronic device (here another user terminal 120, 200).

The electronic control unit 1 1 then determines the step E40 if the current index i is the last commonly used index, for example by consulting the association table T. (Note that the use of the table of T association is optional: it could alternatively only memorize in the storage unit 14 the last index assigned during the previous transition to step E10 described above, which would easily determine in step E40 if the current index i corresponds to this last index attributed.)

If not, the electronic control unit increments the current index i at step E42 and the method loops at step E22 already described.

If yes in step E40, all indices used in the table association T have been traveled so that successive announcement frames have been sent inviting successively (according to the index of the bit to 1 in the binary field F contained in the announcement frame) each of the user terminals 20, 120 , 220 listed in the association table T (that is to say present in the vicinity of the vehicle 10) to connect to receive from the electronic control unit 1 1 the updated data.

The process thus ends in step E44, for example waiting for a new update of the data, in which case the method can loop in step E20 described above.

FIG. 5 presents in the form of a logic diagram a possible operation when the user terminal 20 issues a command intended for the on-board system 13 of the vehicle 10.

This is for example the case where the user of the user terminal 20 wishes to control the unlocking of the doors of the vehicle 10 and performs for this purpose a corresponding action at the user interface 21 of the user terminal 20.

In order to be able to transmit this command, the processor 22 firstly commands the wireless communication module 26 to send a CONNECT_REQ connection request to the wireless communication module 1 6 (step E50).

This CONNECT_REQ connection request can be made in response to an announcement frame sent by the wireless communication module 16 (as in the case of Figure 4 described above). The transmission of the CONNECT_REQ connection request is however not conditioned here by a particular value of index.

The wireless communication module 1 6 receives the connection request CONNECT_REQ in the step E52 and a connection (here in the sense of the BLE protocol) is then established between the wireless communication module 1 6 of the vehicle 10 and the module wireless communication 26 of the user terminal 20.

The electronic control unit 11 and the processor 22 can then exchange data via the established connection (i.e., using the data channels according to the BLE protocol, as explained above), as shown in FIGS. steps E54 and E56.

In particular, the processor 22 can thus transmit the command mentioned above (here an unlock command of the vehicle doors 10) to the electronic control unit 1 1. Once the command has been carried out, the electronic control unit 11 can transmit to the processor 22 updated data (indicative here in particular of the unlocked state of the doors of the vehicle 10).

It is thus considered here that the data stored in the user terminal 20 are then up to date (thanks to the exchange of steps E54 and E56). The electronic control unit 11 can then store in the storage unit 14 (step E58) the identifier of the user terminal 20 (or the associated index, in the association table T, with this user terminal 20). in order not to use the associated index during the next implementation of the loop described above with reference to FIG. 4.

The electronic control unit 11 (or the processor 22) can then control the closure of the established connection (steps E62 and E64), for example by means of a particular frame whose data is a TERMINATE type control code. .

The operation of the onboard system 13 can then resume its usual course, for example in step E20 of Figure 4 to allow electronic devices that have not yet received the updated data to connect successively to the embedded system 13 as explained above. As already indicated, it is possible during this new implementation of the method of FIG. 4 not to implement the iteration corresponding to the index associated with the user terminal 20 which has previously issued the command and therefore stores data. update, this user terminal being designated by the identifier (or index) stored in step E58.

Claims

1. A method of connecting an electronic apparatus (20; 120; 220) comprising a first wireless communication module (26) to an on-board vehicle system (13) comprising a second wireless communication module (1 6) , comprising the following steps:

- broadcasting (E22), by means of the second wireless communication module (1 6), an advertisement frame (ADV) including a data item (F);

- receiving (E24) the announcement frame (ADV) by the first wireless communication module (26);

- connection (E30, E32) of the electronic apparatus (20; 120; 220) to the on-board system (13) if said data item (F) corresponds to the electronic apparatus (20; 120; 220).

The method of claim 1, wherein the data is a bit field (F) and wherein the data corresponds to the electronic apparatus if a bit of the bit field (F) assigned to the electronic apparatus (20; 220) has a predetermined value.

The method of connection of claim 2, wherein an index (n) of the bit assigned to the electronic apparatus (20; 120; 220) is stored in a memory (24) of the electronic apparatus (20; 120; 220).

A method of connection as claimed in claim 2 or 3, wherein a processor (22) of the electronic apparatus (20) determines whether the bit assigned to the electronic apparatus (20) is equal to said predetermined value and controls transmission ( E30), by the first wireless communication module (26), a connection request (CONNECT_REQ) in case of positive determination.

5. Connection method according to one of claims 2 to 4, wherein the bit field (F) contains a single bit, having a first index, at said predetermined value.

The connection method according to claim 5, comprising a subsequent step of broadcasting, by the second wireless communication module (16), another advertisement frame containing a bit field with a single bit, having a second index. distinct from the first index, at said predetermined value.

7. The method of connection of claim 1, wherein the data corresponds to the electronic device if the data is equal to a value assigned to the electronic device.

The method of connection of one of claims 1 to 7, wherein the electronic apparatus is a user terminal (20; 120; 220).

An electronic apparatus (20; 120; 220) comprising a processor (22) and a wireless communication module (26) adapted to receive an advertisement frame (ADV) including a data item (F), characterized in that the processor (22) is adapted to determine whether said data item (F) corresponds to the electronic apparatus (20; 120; 220) and to control transmission by the wireless communication module (26) of a request for connection (CONNECT_REQ) in case of positive determination.

An electronic apparatus according to claim 9, wherein the data is a bit field (F) and wherein the processor (22) is adapted to determine whether a bit of the bit field (F) assigned to the electronic apparatus (20; 120; 220) is a predetermined value and for controlling the transmission by the wireless communication module (26) of a connection request (CONNECT_REQ) in case of positive determination.

1 1. An electronic apparatus according to claim 10, comprising a memory (24) storing an index (n) of the bit assigned to the electronic apparatus (20; 120; 220).

An electronic apparatus according to claim 10 or 11, wherein the bit field (F) contains a single bit having said predetermined value.

Vehicle on-board system (13) (10) comprising an electronic control unit (1 1) and a wireless communication module (1 6), characterized in that the electronic control unit (1 1) is designed for controlling, for each of a plurality of electronic devices (20; 120; 220), broadcasting by the wireless communication module (1 6) of at least one advertisement frame (ADV) including a bit field (F) wherein a bit assigned to the electronic apparatus of interest (20; 120; 220) has a predetermined value.