Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
  • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
  • H04B5/22—Capacitive coupling
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
  • H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
  • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
  • H04B5/24—Inductive coupling
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
  • H04B5/40—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by components specially adapted for near-field transmission
  • H04B5/45—Transponders

Definitions

• a mobile terminal equipped with a near-field communication module said mobile terminal being able to position in an NFC mode or in an IBC mode to perform contactless transactions, and to receive a message in an electromagnetic field on a near field channel, the method being characterized in that it comprises the following steps on the mobile terminal :
• a specific protocol is set up between the reader terminal and the IBC/NFC mobile terminal to initialize a communication according to one mode or the other.
• a mobile terminal can be capable of operating in both modes. It is therefore important to add IBC functionality to the mobile terminal without disrupting standard NFC communications.
• the mobile terminal By receiving an IBC type communication request, the mobile terminal will establish the software and hardware actions necessary to allow the transaction via a return channel, while by receiving an NFC communication request, it will establish a standard NFC communication, according to state of the art.
• the return channel being distinct from the NFC channel, a greater volume of data can be exchanged. Furthermore, the fact that the NFC channel is no longer used allows the wearer of the mobile terminal to move away from the reader terminal.
• the method is characterized in that said invitation message contains a hazard to establish the return channel.
• an existing standard is reused and respected by all the electronic chip cards on the market.
• messages imposed by the standard are exchanged between the reader terminal and the card on the near-field channel. If the new invitation message follows this message format (in terms of frequency, encoding modes, frame types, etc.), compatibility can be ensured at best.
• the method is characterized in that the type of IBC communication is indicated in a field of the message left free by the NFC standard for future use.
• the invention also relates to a mobile terminal comprising such an adaptation device.
• the invention also relates to a system comprising a mobile terminal and a reader terminal as defined previously.
• 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.
• 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.
• 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.
• Figure 3 illustrates an architecture of a reader terminal, or IBC/NFC terminal, according to a particular embodiment of the invention.
• Figure 1 illustrates the context of the invention, in IBC and NFC modes respectively.
• the user (2) carrying the mobile terminal equipped with an NFC-IBC module approaches until almost touching the reader terminal TP to implement a service, for example a monetary transaction.
• the TP and TM terminals are able to communicate directly in the near field (NFC) or via an electromagnetic field (NF) using the user's body (IBC).
• the reader terminal TP can be for example a TPE (for Electronic Payment Terminal), or even a mobile terminal having an NFC module positioned in reader mode, a connected object (in English, IOT), a personal computer, a computer mouse computer, a home gateway, etc. It is capable of transmitting NFC type radio signals via an NFC antenna.
• the reader terminal (TP) comprises a surface constituted by the optionally protected antenna and adapted to react when the user touches it or comes into proximity with it in IBC mode, for example by approaching the hand, or when he approaches his mobile in NFC mode.
• the term "surface” is in no way limiting and given for illustrative purposes, the antenna being the only means essential to the operation of the device.
• the mobile terminal also comprises the following modules: an NFC module for managing NFC and IBC communications.
• This module conventionally comprises a contactless communication integrated circuit (CLF: Contactless Front-End) associated with an ANT antenna initially provided for receiving NFC signals; the circuit formed by the CLF and the antenna can be adapted to receive IBC signals with better quality via the human body.
• a DNF module for managing IBC/NFC near field communications.
• the reader terminal TP can be a transmitting mobile terminal whose architecture is similar to that of the device TP described here.
• a mobile terminal is however not suitable for being positioned in reader mode for a long time because this mode drains the batteries.
• Figures 6 to 8 propose an embodiment which solves this problem.
• FIG. 4 illustrates steps of the NFC/IBC adaptation method according to one embodiment of the invention.
• a mobile terminal TM seeks to validate an electronic transaction according to one of the two contexts presented respectively in FIG. 1, that is to say that the transaction is carried out either in NFC if the user 2 approaches his mobile terminal to the reader terminal (M NFC), or in IBC if he keeps his mobile terminal in his pocket (M IBC).
• NFC mode one of the sub-modes defined by the NFC forum
• IBC mode the additional sub-mode as set out in the embodiments of the present invention.
• the mobile terminal operates in load modulation, that is to say by induction.
• the 14443 standard indicates that, in such a situation, the mobile terminal in emulation and the reader terminal can no longer communicate if they are more than approximately 10 cm apart.
• the reader terminal cannot receive such a message, and therefore returns to step E20 or E21 at the end of the time defined by the NFC “polling” mechanism.
• the IBC initialization WUP IBC message contains, according to the second example (WUP IBC (2)): a first anticollision prefix byte APf, unmodified (although the anticollision algorithm is of little use in the case of the IBC, because it can hardly be several users whose hand is present simultaneously in front of the reader terminal); the "AFI" byte adapted for the IBC while maintaining compatibility with the standard.
• the value 0x0 of the first half-byte corresponds to a private subfamily of the type specified in the second half-byte.
• the user 2' of the terminal TM E wishes to transmit a video P to the terminal TM R of the user 2 (alternatively it could be any document such as sound, Web pages, pictures, etc.)
• a mobile terminal TM E equipped with NFC and IBC of a user 2' seeks to transmit voluminous data to another mobile terminal TM_R equipped with IBC of a user 2, according to one of the two contexts presented respectively in Figures 6 and 7, that is to say that the transaction is carried out when the user 2 'approaches either his mobile terminal TM E (Fig. 7), or his hand (Fig. 6), user 2 who for his part keeps his mobile terminal TM_R in his pocket.

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• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Mobile Radio Communication Systems (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=76730598

Family Applications (1)

Country Status (5)

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• 2021
  • 2021-01-26 FR FR2100730A patent/FR3119285A1/fr not_active Withdrawn
  • 2021-12-20 US US18/262,654 patent/US20240080065A1/en active Pending
  • 2021-12-20 CN CN202180091877.4A patent/CN116888898A/zh active Pending
  • 2021-12-20 EP EP21854673.7A patent/EP4285491A1/de active Pending
  • 2021-12-20 WO PCT/FR2021/052403 patent/WO2022162289A1/fr not_active Ceased

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