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NEAR FIELD COMMUNICATION
 

NEAR FIELD COMMUNICATION

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presentation on near field communication technology.

presentation on near field communication technology.

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    NEAR FIELD COMMUNICATION NEAR FIELD COMMUNICATION Presentation Transcript

    • NEAR FIELD COMMUNICATION
    • INTRODUCTION • NFC or Near Field Communication is a short range high frequency wireless communication technology. • A radio communication is established by touching the two phones or keeping them in a proximity of a few centimeters. • NFC is mainly aimed for mobile or handheld devices. • NFC is an extension of Radio frequency identification or RFID technology. • RFID is mainly used for tracking and identification by sending radio waves.
    • HISTORY • In 1983 the first patent to be associated with the abbreviation RFID was granted to Charles Walton. • In 2004, NFC Forum was formed by Nokia, Philips, Sony, to set standards for NFC . • In 2006 initial specifications for NFC Tags • In 2006 first mobile phone( nokia 6131) with nfc released by nokia. • Android produced its first NFC phone, the Samsung Nexus S, in 2010
    • TECHNICAL FEATURES • NFC is based on RFID which is a system that communicates using radio waves between a reader and an electronic tag attached to an object. • operating frequency 13.56 MHz.data rate 106 kbit/s to 424 kbit/s. • NFC use an initiator and a target; the initiator actively generates an RF field that can power a passive target.
    • OPERATION OF NFC • Near field communication is based on inductive-coupling. • NFC works using magnetic induction between two loop antennas located within each other's 'near field’.
    • NFC TAGS • Passive entities • Tags are Unpowered chips having built-in radios and wireless reader. • They don't require batteries. They get their power from just being near a powered NFC device, for example a mobile phone. • NFC tags, for example stickers or wristbands, contain small microchips with little aerials which can store a small amount of information for transfer to another NFC device.
    • COMMUNICATION MODES There are two modes: • Passive communication mode: The initiator device provides a carrier fields and the target device answers by modulating the existing field. In this mode, the target device may draw its operating power from the initiator-provided electromagnetic field, thus making the target device a transponder. • Active communication mode: Both initiator and target device communicate by alternately generating their own fields. A device deactivates its RF field while it is waiting for data. In this mode, both devices typically have power supplies.
    • OPERATING MODES • Reader/Writer Mode(Proximity Coupling Device):This mode allow the user to retrieve additional information. • Peer-to-Peer: This mode allow two NFC enabled devices to establish a bidirectional connection to exchange contacts, Bluetooth pairing information or any other kind of data. • Card Emulation (Proximity Inductive Coupling Card, PICC):This mode is useful for payment and ticketing applications for example.
    • COMPARISON WITH EXISTING TECHNOLOGY
    • USES AND APPLICATION • Connect electronic devices . • Access digital content, using a wireless device such as a mobile phone to read a “smart” poster embedded with an RF tag,url etc. • Make contactless transactions, including those for payment, access and ticketing. • Exchange of information such as schedules, maps, business card and coupon delivery in a few hundred milliseconds; • Pay for items just by waving your phone over the NFC capable devices. • Transferring images, posters for displaying and printing • It could, for example, replace the pairing step of establishing connections. • NFC can be used in social networking situations, such as sharing contacts, photos, videos or files ,and entering multiplayer mobile games.
    • CATEGORIES OF NFC • Touch and Go: Applications such as access control or transport/event ticketing, where the user needs only to bring the device storing the ticket or access code close to the reader. Also, for simple data capture applications, such as picking up an Internet URL from a smart label on a poster. • Touch and Confirm: Applications such as mobile payment where the user has to confirm the interaction by entering a password or just accepting the transaction. • Touch and Connect: Linking two NFC-enabled devices to enable peer to peer transfer of data such as downloading music, exchanging images or synchronizing address books. • Touch and Explore: NFC devices may offer more than one possible function. The consumer will be able to explore a device's capabilities to find out which functionalities and services are offered. Eg -url tags
    • NFC SECURITY There are several important areas for near field communications security. Some of the major NFC security areas are listed below:. • Eavesdropping • Data corruption • Data modification
    • ADVANTAGES OF NFC • High convenience to the user, because the data exchange is done by bringing two devices together. • Reduces cost of electronic issuance . • Secure communication. • No special software. • No manual configuration and settings. • No search and pair procedure.
    • DISADVANTAGES OF NFC • The system has the limitation that it can be operated only with devices under a short range i.e around 10 cm. • The data transfer rate is very less at about 106kbps, 212 kbps and 424kbps
    • CONCLUSION Mobile handsets are the primary target for NFC and soon NFC will be implemented in most handheld devices. Even though NFC have the shortest range among radio frequency technologies, combining them with existing technologies like Bluetooth or Infrared can increase its range of applications.