The patent's assignee is
News editors obtained the following quote from the background information supplied by the inventors: "The present disclosure generally relates to near-field communication systems and, more specifically, to the configuration of near-field communication devices for P2P (peer to peer) transmissions.
"More and more portable devices (smartphones, touch pads, etc.) are equipped with near-field communication devices (NFC).
"Most often, such portable devices are capable of operating in two modes, respectively called card mode and reader mode. In card mode, the device operates as a contactless chip card to communicate with a near-field communication terminal (for example, another mobile device operating in reader mode). In reader mode, the device operates as a terminal and is capable of reading contactless cards (or another device operating in card mode), just as an electromagnetic transponder reader.
"Electromagnetic transponder systems used in near-field communications are now well known. Their operation is based on the emission of a radio frequency radiation by the terminal or the reader to communicate with, and possibly to remotely supply, a transponder present in the field of the terminal. The transponder, when it is within the terminal range, captures this field and communicates by modulating the load that it forms on this field. A transponder is within the range when it is capable of exploiting the field, and possibly of extracting from this field a power sufficient for the operation of the circuits comprised therein. The terminal and the transponder are generally tuned to a same frequency.
"When the device operates in reader mode, it most often has to remotely supply the transponder located within its range and with which it desires to communicate. Now, there exist different natures of transponders, from the simple passive electronic tag to more advanced transponders equipped with microprocessors. A transmission between a reader and a transponder thus generally begins with a search for the type of communication to be established between the two devices, that is, the communication standard to be respected.
"The availability of devices capable of communicating in near field provides another possibility of communication, the peer-to-peer file exchange. Such a communication is performed according to an ISO-18092 (or ECMA 340; or NFC-Forum Digital Protocol) standard and is generally called F-type modulation. However, present processes for configuring an NFC device according to the type of modulation according to which it is to communicate may not be capable of detecting a need for a peer-to-peer communication."
As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent application: "An embodiment overcomes all or part of the disadvantages of usual techniques for configuring a mobile near-field communication device according to the type of modulation according to which it is to communicate.
"Another embodiment provides a configuration method capable of detecting a peer-to-peer communication need.
"Another embodiment provides a solution compatible with usual processes for determining the communication type.
"An embodiment provides a method for configuring a first device for a near-field communication with a second device, wherein a peer-to-peer mode is selected if the second device draws the power supply of its circuits from a battery.
"According to an embodiment, the first device measures information representative of the current in an oscillating circuit for generating the field and compares it with a first threshold.
"According to an embodiment, the peer-to-peer mode is selected if the value of said information is higher than said first threshold.
"According to an embodiment, the peer-to-peer mode is selected if, further, the value of said information is higher than a second threshold higher than the first threshold.
"According to an embodiment, if the value of said information is lower than said first threshold, the first device emits frames according to different modulation types and monitors the response of the second device.
"According to an embodiment, the first device is initially configured for a communication according to an F-type modulation.
"A device equipped with a near-field communication circuit, capable of implementing the method, is also provided.
"The foregoing and other features and advantages will be discussed in detail in the following non-limiting description of specific embodiments in connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
"FIG. 1 is a simplified view of a system of peer-to-peer communication by means of mobile near-field communication devices of the type to which the embodiments which will be described apply;
"FIG. 2 is a simplified representation of a reader and of a transponder used in a near-field communication;
"FIGS. 3A and 3B are timing diagrams illustrating the configuration of a reader on a modulation type;
"FIG. 4 is a timing diagram of an example of configuration of the type of modulation of a near-field communication router;
"FIG. 5 illustrates, in the form of a block diagram, an embodiment of a configuration method capable of detecting a peer-to-peer communication need;
"FIGS. 6A and 6B illustrate the operation of the method of FIG. 5 in the absence of a peer-to-peer communication need;
"FIGS. 7A and 7B illustrate the operation of the method of FIG. 5 in the presence of a peer-to-peer communication need."
For additional information on this patent application, see: Van Nieuwenhuyze, Olivier; Charles, Alexandre. Configuration of Nfc Routers for P2p Communication. Filed
Keywords for this news article include: Electromagnet,
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