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External device for mobile communication terminal and NFC method using the same

  • US 8,265,553 B2
  • Filed: 12/22/2006
  • Issued: 09/11/2012
  • Est. Priority Date: 12/30/2005
  • Status: Expired due to Fees
First Claim
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1. An external device for a mobile communication terminal, said external device comprising:

  • a serial communication unit connectable to the mobile communication terminal through a connector;

    an antenna;

    a Near Field Communication (NFC) unit for communicating with the mobile communication terminal through the serial communication unit and communicating with an outside device via non-contact NFC through the antenna;

    a smart card unit for communicating with the NFC unit;

    a Universal Serial Bus (USB) communication unit, other than the serial communication unit; and

    a protocol matching unit coupled between the NFC unit and the smart card unit;

    whereinthe external device is configured to detect whether the external device is connected to one of(i) the mobile communication terminal through the connector of the serial communication unit, and(ii) to a USB host device via the USB communication unit;

    the NFC unit is configured to, in response to a determination that the external device is connected to the mobile communication terminal,communicate with the mobile communication terminal via a serial communication protocol,communicate with the outside device by transmitting/receiving signals through the antenna via non-contact NFC, andcommunicate with the smart card unit, wherein the protocol matching unit is configured to perform protocol conversion between the NFC unit and the smart card unit; and

    the external device is configured to, in response to a determination that the external device is connected to the USB host device, serve as a USB slave and communicate with the USB host device via a USB interface.

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