FR3103984A1 - Method and device for transmitting at least one frame of a near-field communication protocol, corresponding receiving method and receiving device. - Google Patents

Abstract

The invention relates to a method for transmitting at least one frame of a near-field communication protocol. Such a method is implemented by a transmitter device (111) associated with at least one surface (110) sensitive to contact with a user (10). The method includes, when at least part of the user's body comes into (E83) contact with or touches the sensitive surface: the determination (E84) of a location of a contact zone of the user on the sensitive surface, the determination (E85) of a content to be inserted into said frame according to the determined location, the transmission (E86) of said frame comprising said content, via a communication channel using electromagnetic wave conduction capacities of the user's body to a receiver device of said user. Figure for abstract: FIG. 8

Description

Method and device for transmitting at least one frame of a near-field communication protocol, corresponding method for receiving and receiving device.

1. Field of the invention

The invention relates to NFC communications implementing a communication technology using the natural transmission capacities of the human body.

2. Prior Art

The natural transmission capacities of the human body (IBC for Intra Body Communication in English), coupled with the use of an NFC reader (for Near Field Communication in English) present in a mobile telephone, make it possible to build communication services with adapted mobile or portable NFC devices (hereinafter referred to as devices) while keeping them in a pocket or in a bag carried on one's person.

Indeed, IBC technology makes it possible to transmit an NFC signal using the electromagnetic wave conduction capacities of the human body. When the user touches an NFC transmitter device with his hand, a radio carrier wave, or electromagnetic signal, is transmitted by the NFC transmitter device through the user's body to a receiver device adapted to receive such a signal, for example a mobile phone, without the user having to bring his mobile phone close to the NFC transmitter.

The transmitted NFC signal can be processed by the receiving devices in two different ways, in parallel:

• NFC signal processing concerns the extraction of the data contained in the NFC frame and which can then be used by a high-level application of the receiving devices and,
• another processing of the NFC signal concerns the measurement of the power of the received signal. The evolution of the form of the received NFC signal makes it possible to characterize or not a voluntary gesture of the user. In fact, when the user approaches his hand from the NFC reader, places it there and then moves it away, the shape of the NFC signal is modified accordingly: the NFC signal first presents an upward slope when the user approaches his hand of the NFC reader, then a tray when the hand lands on it or touches the reader and finally a downward slope when the user moves his hand away. The detection of such a shape allows the device receiving the NFC signal to determine whether the NFC signal received is characteristic of a voluntary gesture by the user, i.e. whether the user has approached his hand, or not.

Two families of services are based on this signal processing:

- services based on the sole transmission of data in the frame, the transmission of data being validated however by the characterization of a voluntary gesture of the user,

- other services also using the shape of the curve of the evolution over time of the received power of the NFC signal to identify a user within a group of authorized persons, each person having his own physio-dynamic fingerprint , linked to the way he puts his hand on an NFC reader and then removes it. Indeed, the shape of the NFC signal is also characteristic of the person who placed their hand.

The first family of services thus covers skip-the-line terminals (pro, VIP), personalized information terminals with identifiers (login/password, loyalty card, reservation number, file number, etc.) stored on the device, electronic gondola tags (EEG)…

The second family of services covers access control services, at home, in business, with secure printing, etc.

In the case of the first family of services cited above, it appears that when the user touches an NFC reader to validate the transmission of an NFC signal (voluntary gesture by the user), the user cannot dialogue with the NFC reader, for example to make a selection or navigate in a menu…

To be able to go further in the use of a service linked to the transmission of the NFC signal, a solution for the user is to take out his mobile phone and interact on it using an application of the covered service installed on the mobile phone. The advantage of IBC technology allowing the user to keep his mobile phone in his bag or pocket is then lost.

3. Disclosure of Invention

The invention improves the state of the art. It proposes a method for transmitting at least one frame of a near-field communication protocol, the method being implemented by a transmitter device associated with at least one sensitive surface in contact with a user. Such a process includes, when at least part of the user's body comes into contact with or touches the sensitive surface:

• the determination of a location of a contact zone of the user on the sensitive surface,
• the determination of a content to be inserted into said frame according to the determined location,
• the transmission of said frame comprising said content, via a communication channel using electromagnetic wave conduction capacities of the user's body to a receiving device of said user.

The invention thus makes it possible to modify the content of an NFC frame according to the contact area of the user on a sensitive surface associated with the transmitter device. Thus, an application of a device receiving the NFC frame, for example a mobile telephone of the user, can exploit the content of the frame or transmit it to an external server.

By surface sensitive to contact, we mean here a surface associated with the transmitter device able to detect a contact of the user on the surface and to determine the location of such contact on the surface. Such a contact-sensitive surface can be included in the transmitter device or else connected to the latter.

As the content of the NFC frame varies according to the contact area of the sensitive surface, different mechanisms can be implemented within the receiver device depending on this content. For example, exchanges can take place between the receiver device and the transmitter device or an external server with which the transmitter device is able to communicate. Such exchanges are managed by user interactions on different contact areas of the sensitive surface.

The user can thus dialogue with the transmitter device without needing to have the receiver device in hand.

According to a particular embodiment of the invention, the transmitted frame includes at least one of the following information:

• Information representative of the location of the user's contact area,
• An address allowing the receiver device to send at least one notification to the sender device.

According to another particular embodiment of the invention, the sensitive surface comprises a display device, and the transmission method further comprises the modification of at least one item of information displayed on the display device, by depending on the location of the contact area.

According to this particular embodiment of the invention, the sensitive surface comprises a display device on which the information displayed can be modified according to the contact zone of the user. For example, this particular embodiment of the invention allows the user to navigate through a menu of a service offered by the transmitter device or to make a selection, etc.

According to another particular embodiment of the invention, the transmission method further comprises:

• the receipt of a notification from the receiver device, said notification comprising information representative of at least one identifier of said user,
• the modification of at least one item of information displayed on the display device being a function of said user identifier.

According to this particular embodiment of the invention, it is thus possible to adapt the information displayed according to the identity of the user.

According to another particular embodiment of the invention, the transmission method further comprises receiving a notification from the receiver device, said notification comprising information representative of the location of the contact zone. According to this particular embodiment of the invention, the transmitter device does not have to memorize the location of the user's contact zone. This information is retransmitted to it by the receiving device. Thus, the transmitter device is simpler to implement.

According to another particular embodiment of the invention, the contact zone is fixed or moving. According to this particular embodiment of the invention, the contact zone can be fixed on the sensitive surface. For example, the sensitive surface can be a surface provided with a set of sensors placed at different locations on the surface, or the sensitive surface can be a touch screen displaying different icons on which the user can interact with one or more fingers. .

According to another variant, the contact zone can be on the move. In other words, the user interacts on the sensitive surface by moving one or more fingers on the sensitive surface. For example, when the sensitive surface is a touch screen, the user moves one or more fingers on the touch screen to draw a determined or arbitrary diagram….

The invention also relates to a method for receiving at least one frame of a near-field communication protocol. Such a method comprises the reception, via a communication channel using electromagnetic wave conduction capacities of the body of a user, of said frame, a content included in the frame being a function of a location of a contact zone of the user on a surface associated with a transmitter device, said surface being sensitive to contact with said user.

According to a particular embodiment of the invention, the reception method further comprises sending, to the sender device or to a server, a notification comprising information representing at least one identifier of said user.

The invention also relates to a transmitter device comprising:

• a near field communication transmission module configured to transmit at least one frame according to a near field communication protocol,
• a processor and a memory configured to, when at least a part of a body of a user comes into contact with or touches a surface associated with the transmitter device, determine a content to be inserted into said frame according to a location of a user contact zone on the surface associated with the transmitter device, said surface being sensitive to contact with said user;
• said frame being emitted via a communication channel using electromagnetic wave conduction capacities of said user's body to a receiving device of said user, when said at least one part of the user's body comes into contact with or touches the sensitive surface .

According to a particular embodiment of the invention, the transmitter device comprises said sensitive surface.

According to another particular embodiment of the invention, the sensitive surface comprises a display device, the processor and the memory also being configured to control the modification of at least one item of information displayed by the display device as a function the location of the user's contact area.

According to another particular embodiment of the invention, the transmitter device further comprises a reception module configured to receive a notification from the receiver device, said notification comprising at least one item of information representative of at least one identifier of said user and /or information representative of the location of the user's contact area.

The invention also relates to a terminal comprising a transmitter device according to any one of the particular embodiments described above.

The invention also relates to a receiver device comprising a near-field communication reception module configured to receive at least one frame according to a near-field communication protocol, via a communication channel using electromagnetic wave conduction capacities of the body of a user, a content included in the frame being a function of a location of a contact zone of the user on a surface associated with a transmitter device, said surface being sensitive to contact with said user, and a processor and a memory configured to process the contents of the frame.

The invention also relates to a computer program comprising instructions for implementing the transmission method or the reception method above according to any one of the particular embodiments described above, when said program is executed by a processor. The transmission method and/or the reception method can be implemented in various ways, in particular in wired form or in software form.

This 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 partially compiled form, or in any other desirable form.

The invention also relates to a recording medium or information medium readable by a computer, and comprising instructions of a computer program as mentioned above. The recording media mentioned above can be any entity or device capable of storing the program. For example, the medium may comprise a storage means, such as a ROM, for example a CD ROM or a microelectronic circuit ROM, or even a magnetic recording means, for example a hard disk. On the other hand, the recording media may correspond to a transmissible medium such as an electrical or optical signal, which may be conveyed via an electrical or optical cable, by radio or by other means. The programs according to the invention can in particular be downloaded from an Internet-type network.

Alternatively, the recording media may correspond to an integrated circuit in which the program is incorporated, the circuit being adapted to execute or to be used in the execution of the transmission method or the reception method in question.

4. List of Figures

Other characteristics and advantages of the invention will appear more clearly on reading the following description of particular embodiments, given by way of simple illustrative and non-limiting examples, and the appended drawings, among which:

FIG. 1 illustrates an example of an environment for implementing the invention according to a particular embodiment of the invention.

FIG. 2 illustrates an example of a contact surface coordinate system according to a particular embodiment of the invention,

FIG. 3 illustrates an example of user interaction on a contact-sensitive contact surface according to a particular embodiment of the invention,

FIG. 4 illustrates another example of user interaction on a touch-sensitive contact surface according to a particular embodiment of the invention,

FIG. 5 illustrates another example of user interaction on a touch-sensitive contact surface according to a particular embodiment of the invention,

FIG. 6 illustrates an example of a transmitter device according to a particular embodiment of the invention,

FIG. 7 illustrates an example of a receiver device according to a particular embodiment of the invention,

FIG. 8 illustrates steps of the transmission method and of the reception method according to particular embodiments of the invention.

5. Description of an embodiment of the invention

FIG. 1 illustrates an example of an environment for implementing the invention according to a particular embodiment of the invention.

Such an environment comprises for example a transmitter device (111) associated with a surface (110) sensitive to the contact of a user (10). Such a transmitter device (111) is configured to transmit an NFC (Near Field Communication) frame using the electromagnetic wave conduction capabilities of the user when the user comes into contact with or touches the sensitive surface (110 ). The user is equipped with a receiver device (12), for example a mobile terminal or a smartphone (for smart phone).

The terminal (12) according to the invention is a portable device naturally capable of receiving radio carrier waves, via an antenna, through the body of the user (10). To this end, the terminal (12) is located in the immediate vicinity of the user (10), without necessarily being in direct contact with the latter. For example, the terminal (12) is placed inside a pocket or a bag worn against the user. In these configurations, it is estimated that the terminal (12) is not more than a few centimeters away from the body of the user (10). The distance is for example less than 5 cm. The terminal (12) is equipped with a battery or batteries, for autonomous operation. According to this example, it is a mobile terminal equipped with an NFC antenna (not shown) adapted in CBB mode (for Communication By Body in English) to receive the electrical signals modulated in the form of an electromagnetic wave through the body of the user when the latter is in close proximity to the transmitter device (111).

For example, the transmitter device (111) can be an NFC skip-the-line terminal, an information terminal, an electronic gondola tag (EEG), etc. It is suitable for providing a service to the user when the user comes into contact with the sensitive surface (110) associated with the transmitter device (111), for example to allow the user to authenticate himself to the terminal.

Following the contact of the user (10) on the sensitive surface (110), the transmitter device determines a content to be inserted into the NFC frame to be transmitted according to the location of the user's contact zone on the sensitive surface (110) and transmits the NFC frame. The terminal (12) of the user (10) receives this NFC frame and processes it according to its content. For example, when the content includes an address allowing the terminal to transmit authentication data to an authentication management server (13), the terminal (12) extracts this authentication data and transmits it to the server (13) via a communication network (RES), for example a 3G or WiFi network, or else according to a short distance communication, such as Bluetooth.

FIG. 2 illustrates an example of a contact surface coordinate system according to a particular embodiment of the invention. According to the invention, the surface sensitive to the contact of a human is capable of detecting a contact of a user on this surface and of generating over time the coordinates of the contact zone, for example via the system of 2D coordinates (X,Y) shown in figure 2.

FIG. 3 illustrates an example of interaction of a user on a surface sensitive to contact with a human according to a particular embodiment of the invention. According to this example, the user interacts on the sensitive surface using a finger and the contact area is fixed.

FIG. 4 illustrates another example of interaction of a user on a surface sensitive to contact with a human according to a particular embodiment of the invention. According to this example, the contact zone is moving. The user interacts on the sensitive surface using a finger that he moves on the sensitive surface, either by sliding or tapping.

FIG. 5 illustrates another example of interaction of a user on a surface sensitive to contact with a human according to a particular embodiment of the invention. According to this example, the user interacts on the sensitive surface using several fingers at different locations on the sensitive surface. According to this example, there are therefore several contact zones.

FIG. 6 illustrates an example of a transmitter device (EM) according to a particular embodiment of the invention.

According to this particular embodiment of the invention, the transmitter device 111 has the classic architecture of a computer, and notably comprises a memory MEM, a processing unit UT, equipped for example with a processor PROC, and controlled by the computer program PG stored in memory MEM. The computer program PG includes instructions for implementing the steps of the transmission method which will be described later, when the program is executed by the processor PROC.

On initialization, the code instructions of the computer program PG are for example loaded into a memory before being executed by the processor PROC. The processor PROC of the processing unit UT notably implements the steps of the transmission method according to any one of the particular embodiments described below in relation to FIG. 8, according to the instructions of the computer program PG .

According to a particular embodiment of the invention, the transmitter device 111 also comprises a near-field communication module ANT comprising in particular an antenna suitable for transmitting signals over the radio channel and possibly via the human body and a modulator intended to adapt a digital signal produced by the processor into a modulated electrical signal, intended to be transmitted, via the antenna.

According to a particular embodiment of the invention, the transmitter device 111 comprises a contact-sensitive surface 110 suitable for detecting contact by the user on the sensitive surface, and determining the location of the contact zone.

For example, this sensitive surface can be placed close to the antenna, so that a modulated electrical signal emitted via the antenna is able to be conveyed by the body of the user who is close to the surface. . In an exemplary embodiment, the antenna can be integrated into the surface.

According to another particular embodiment of the invention, the sensitive surface is not included in the transmitter device but connected to it by wire or wirelessly.

Whether it is integrated into the transmitter device or only connected to it, the surface is arranged in such a way as to cooperate with the processing unit UT to implement the steps of the transmission method, and in particular to transmit the location of the contact zone to the processing unit UT.

The processing unit UT and the memory MEM are in particular configured to, when at least one part of a user's body comes into contact with or touches the surface associated with the transmitter device, determine a content to be inserted into an NFC frame by depending on the location of the user's contact area on the surface.

According to a particular embodiment of the invention, the transmitter device 111 comprises a display device AFF.

According to another particular embodiment of the invention, the display device AFF is included in the sensitive surface 110. For example, it may be a capacitive touch screen, or a flexible display placed in front of a matrix flat microcontacts.

The display can be fixed (image) or dynamic (screen), superimposed or juxtaposed on the sensitive surface 110. The display can for example take the form of a poster or an electronic gondola label (EE, or ESL for Electronic Shelter Label) driven by the UT processing unit. As a variant, the display device can be driven by its own processing unit (not shown), the latter then being arranged to communicate with the processing unit UT of the transmitter device 111.

The display of the AFF display device may show areas of graphics and/or text associated with the zoning of the contact sensitive surface.

According to a particular embodiment of the invention, the transmitter device 111 comprises a communication interface COM allowing the transmitter device 111 to establish communications via a fixed or mobile data network. According to this particular embodiment of the invention, the transmitter device can thus transmit to a server information relating to an interaction of the user on the sensitive surface, for example the location of the contact zone. According to another variant, the transmitter device can receive information from the server, for example to modify the information displayed on the display device AFF.

According to another example, the communication interface COM allows the transmitter device to receive from the receiver device, a notification comprising at least one piece of information representing at least one identifier of said user and/or one piece of information representing the location of the user contact area.

According to a particular embodiment of the invention, the transmitter device is included in a terminal.

According to another particular embodiment of the invention, the transmitter device is included in an electronic gondola tag. According to this example, the sender device is configured to communicate with a tag display management server.

FIG. 7 illustrates an example of a receiver device 12 according to a particular embodiment of the invention.

According to this particular embodiment of the invention, the receiver device 12 has the classic architecture of a computer, and notably comprises a memory MEM', a processing unit UT', equipped for example with a processor PROC', and controlled by the computer program PG' stored in memory MEM'. The computer program PG' includes instructions for implementing the steps of the reception method which will be described later, when the program is executed by the processor PROC'.

On initialization, the code instructions of the computer program PG' are for example loaded into a memory before being executed by the processor PROC'. The processor PROC' of the processing unit UT' notably implements the steps of the reception method according to any one of the particular embodiments described below in relation to FIG. 8, according to the instructions of the program of computer PG'.

According to a particular embodiment of the invention, the receiver device 12 also comprises a near-field communication module ANT' comprising in particular a CBB antenna adapted to receive signals over the radio channel and possibly via the human body, and a demodulator intended to receive via the antenna a modulated electrical signal and to transform it into a digital signal intended to be transmitted to the processing unit UT and the software components necessary for the implementation of CBB/IBC communications.

The processor PROC' and the memory MEM' are in particular configured to process the content of an NFC frame received by the NFC module ANT'.

According to a particular embodiment of the invention, the receiver device 12 also comprises a voluntary gesture detection DGV module configured to determine whether an NFC frame received by the near-field communication module ANT' has been transmitted following contact of the user with an NFC transmitter device of the frame. According to this particular embodiment of the invention, the processor PROC' and the memory MEM' are configured to process the content of an NFC frame received when the DGV module has detected a voluntary gesture by the user.

According to a particular embodiment of the invention, the receiver device 12 comprises a communication interface COM' allowing the receiver device 12 to establish communications via a mobile data network, WiFi, or according to a short distance communication, for example Bluetooth.

According to a particular embodiment of the invention, the receiver device 12 comprises a user interaction module INT, for example a touch screen.

According to a particular embodiment of the invention, the receiver device 12 is included in a mobile terminal, for example a smartphone.

FIG. 8 illustrates steps of the transmission method and of the reception method according to particular embodiments of the invention.

The transmission method is implemented by the transmitter device 111 associated with the sensitive surface 110 described in relation to FIGS. 1 and 6 and the reception method is implemented by the receiver device 12 described in relation to FIGS. and 7.

Different areas of the contact-sensitive surface (110) are associated by their coordinates with input data in scripts for interactive dialogue with users.

When a user touches a particular zone of the sensitive surface 110, for example when prompted by the display, the coordinates of this contact zone are used to launch the associated script or progress in a script already launched.

During the execution of this script, the useful content of the NFC frame is modified accordingly, by inserting therein an information element (one or more bits) indicating that the sensitive surface 110 (for example the touch surface of the NFC reader 111) is or is not the subject at a given time, on the part of the user, of one or more fixed or sliding contacts in one or more given places on its surface.

The steps of the transmission method and of the reception method according to particular embodiments of the invention are described below in relation to FIG.

According to a particular embodiment of the invention, during a step E80, a server (13) controls the display of information on the display device of the transmitter device (111).

According to the particular embodiment of the invention described here, the transmitter device (111) transmits NFC frames continuously. Thus, during a step E81, the transmitter device (111) transmits an NFC frame comprising a default content.

In another particular embodiment of the invention, the transmitter device (111) only transmits an NFC frame when the user comes into contact with the sensitive surface 110.

The user 10 being close to the transmitter device 111, the NFC frame is received during step E81, by the terminal 12 of the user 10.

During a step E82, the NFC module (ANT') of the terminal 12 transmits the content of the NFC frame to a high-level application APP of the terminal 12 for processing the content of the frame.

According to the particular embodiment of the invention described here, the high-level application APP of the terminal 12 processes the content of the NFC frame only when the NFC frame is validated by the detection of a voluntary gesture by the user by the DGV module. As the user has not yet interacted on the sensitive surface, the NFC frame is not validated. The APP application of terminal 12 therefore does not process it.

During a step E83, the user interacts on the sensitive surface 110.

During a step E84, the transmitter device 111 determines, using the sensitive surface 110, the location of the user's contact zone on the sensitive surface 110.

During a step E85, the transmitter device 111 determines a content to be inserted into the next NFC frame to be transmitted. This content is determined according to the location of the contact zone on the sensitive surface (110).

During a step E86, the transmitter device transmits the NFC frame comprising the inserted content, via a communication channel using electromagnetic wave conduction capacities of the body of the user (10) to the receiver device (12).

During a step E82′, the NFC module (ANT′) of the terminal 12 transmits the content of the NFC frame to a high-level application APP of the terminal 12 for processing the content of the frame.

In parallel, during a step E87, the DGV module of the terminal 12 detects a voluntary gesture by the user, for example the measurement of the power of the received signal, and informs the APP application of the terminal 12.

During a step E88, the application APP then processes the content of the received NFC frame.

According to a particular embodiment of the invention, following the detection of a user interaction on the contact-sensitive surface, the transmitter device modifies, during a step E93, the information or information displayed ( s) on the display device, depending on the location of the contact area. According to this particular embodiment of the invention, the user can navigate through an interactive menu and obtain, via the NFC frame sent on each contact, information associated with the service provided by the sender device.

According to a particular embodiment of the invention, the NFC frame received by the terminal 12 during step E82' can include, among other things, information representative of the location of the user's contact zone, and/or a address allowing the terminal 12 to transmit a notification intended for the sender device 111 or another device.

According to a particular embodiment of the invention, following the processing of the NFC frame by the APP application of the terminal 12, the terminal 12 sends, during a step E89, to the transmitter device 111 or another device, a notification comprising information representative of at least one identifier of the user. For example, the application APP extracts from a memory of the terminal 12 user authentication data, corresponding to said at least one user identifier, necessary to access the service provided by the transmitter device 111 (for example wire-cut access terminal, or an EEG).

During a step E90, the user authentication data is transmitted for example to the management server 13 to validate the authentication of the user with the service.

After validation, during a step E91, the transmitter device 111 receives, from the server 13, a command to modify, during step E92, the data displayed on the display device according to the authentication data . For example, personalized information can be displayed to him.

According to a variant, during step E89, the terminal 12 also transmits to the transmitter device 111 the coordinates of the user's contact zone. According to this variant, during the interaction of the user on the sensitive surface, the coordinates of the contact zone are not memorized by the transmitter device 111. This makes it possible to use transmitter devices that are relatively simple and less expensive to produce. . The coordinates of the contact zone can then be transmitted by the transmitter device 111 to the server 13 during step E90. The server 13 can thus take this into account to control the modification of the display of the data displayed to the user.

According to the particular modes described above, it can be seen that the script to be executed can be implemented by the transmitter device 111 or else by the server 13.

According to the particular modes described above, an NFC frame is sent continuously and, on contact with the user, information on the characteristics of the contact, in particular the location, is inserted into the NFC frame and transmitted to the terminal of the user, who can then integrate them into a request to an information system, for example the server 13.

In other particular embodiments of the invention, an NFC frame is transmitted continuously and, on contact with the user, the information that a contact has taken place is only inserted into the NFC frame and transmitted to the terminal. of the user, who can then issue a request to an information system.

In other particular embodiments of the invention, an NFC frame is transmitted only on contact with the user. On such a contact, information on the characteristics of the contact is inserted into the NFC frame and transmitted to the user's terminal, which can then integrate it into a request to an information system.

The invention thus allows an IBC/NFC terminal carried by a user to receive directly via NFC differentiated information according to the gestures of the user on the sensitive surface of the transmitter device, whether or not these gestures are guided by fixed images. or animated displayed for the user on this surface.

The content of the payload of the NFC frame transmitted by the transmitter device can advantageously be modified according to the coordinates of the contact zone. This allows the application of the user's terminal supporting NFC/IBC communication to use this information or simply to transmit it to an external server which is also the recipient, for example, of the user's authentication data.

Claims (15)

Method for transmitting at least one frame of a near-field communication protocol, the method being implemented by a transmitter device associated with at least one surface sensitive to the contact of a user (10), the method comprising , when at least one part of the user's body comes into contact with or touches the sensitive surface (E83):
- the determination (E84) of a location of a contact zone of the user on the sensitive surface,
- the determination (E85) of a content to be inserted into said frame according to the determined location,
- the transmission (E86) of said frame comprising said content, via a communication channel using electromagnetic wave conduction capabilities of the user's body to a receiver device of said user. Transmission method according to claim 1, in which the transmitted frame comprises at least one of the following information:
- Information representative of the location of the user's contact area,
- An address allowing the receiving device to transmit at least one notification to the sending device. Transmission method according to claim 1 or 2, in which the sensitive surface comprises a display device, the transmission method further comprising the modification of at least one piece of information displayed on the display device, as a function the location of the contact zone. A transmission method according to claim 3, further comprising:
- the receipt of a notification from the receiver device, said notification comprising information representative of at least one identifier of said user,
- the modification of at least one item of information displayed on the display device being a function of said user identifier. Transmission method according to claim 3, further comprising receiving a notification from the receiver device, said notification comprising information representative of the location of the contact zone. An emission method according to any of claims 1-5, wherein the contact area is stationary or moving. A method of receiving at least one frame of a near-field communication protocol, the method comprising receiving (E86) said frame, via a communication channel using electromagnetic wave conduction capabilities of the body of a user, a content included in the frame being a function of a location of a contact zone of the user on a surface associated with a transmitter device, said surface being sensitive to contact with said user. Reception method according to claim 7, further comprising sending, to the sender device or to a server, a notification comprising information representing at least one identifier of said user. Transmitter device comprising:
- a near-field communication transmission module (ANT) configured to transmit at least one frame according to a near-field communication protocol,
- a processor (PROC) and a memory (MEM) configured to, when at least part of a user's body comes into contact with or touches a surface (110) associated with the transmitter device, determine a content to be inserted in said frame as a function of a location of a contact zone of the user on the surface associated with the transmitter device, said surface being sensitive to contact with said user;
- Said frame being transmitted via a communication channel using electromagnetic wave conduction capabilities of the body of said user to a receiver device of said user. A transmitter device according to claim 9, comprising said sensitive surface. Transmitter device according to claim 9 or 10, in which the sensitive surface comprises a display device, the processor and the memory being further configured to control the modification of at least one item of information displayed by the display device as a function of the location of the user's contact area. Transmitter device according to any one of claims 9 to 11, further comprising a reception module configured to receive a notification from the receiver device, said notification comprising at least one item of information representative of at least one identifier of said user and/or information representative of the location of the user's contact zone. Terminal comprising a transmitter device according to any one of claims 9 to 12. Receiver device comprising:
- A near-field communication reception module (ANT') configured to receive at least one frame according to a near-field communication protocol, via a communication channel using electromagnetic wave conduction capacities of a user's body , a content included in the frame being a function of a location of a contact zone of the user on a surface associated with a transmitter device, said surface being sensitive to contact with said user,
- A processor (PROC') and a memory (MEM') configured to process the content of the frame. Computer program comprising instructions for implementing the transmission method according to any one of Claims 1 to 6 or the reception method according to any one of Claims 7 or 8, when the program is executed by a processor.