NEAR FIELDCOMMUNICATION By :Amit Patel (RK University,Rajkot)
INTRODUCTION NFC is one of the latest short-range wireless connectivity technology, •NFC offers safe simple and • communication between electronic devices. Users of NFC-enabled devices can simply point or touch their devices to other NFC- enabled elements in the environment to communicate with them, making application and data usage easy and convenient. With NFC technology, communication occurs when an NFC- compatible device is brought within a few centimeters of another NFC device or an NFC tag. The big advantage of the short transmission range is that it inhibits eavesdropping on NFC-enabled transactions. NFC technology opens up exciting new usage scenarios for
EVOLUTION OF NFCTECHNOLOGY In 2004, NFC Forum was formed by Nokia, Philips, Sony,to set standards for NFC . Every NFC enabled device will have “N-Mark” trademark ,developed by NFC Forum. N MARK TRADEMARK
EVOLUTION OF NFC TECHNOLOGY In 2006 First mobile phone( nokia 6131) with NFC released by NOKIA.
How NFC Works •Operates at 13.56 MHz •Transfers data at up to 424 bits/sec 1) Coil in the first smart phone sets up a current that is picked up a second smart phone or reader. 2) The second smart phone receives the ―induced current‖ from the first, recognizes it as a valid signal and offers a connection. 3) The first cell phone accepts the connection and begins the transaction.
Mobile devices, NFC has three modes of operation This NFC mode enables mobile devices to read data stored in passive RFID tags embedded in public posters, displays, and products — and to act upon that data that contains a Uniform Resource Locator (URL), which is an Internet encoding of access instructions for a file or Web address, or instruction for making a call, orReader/Writer the SMS instruction for sending a text message. This NFC mode also enables mobile devices to write data to some tags – notably virtual tags in other devices.
Conti.. This NFC mode enables mobile device owners to make a contactless business transaction, in the same way smart cards are used today. This mode of operation enables mobile devices to be used for identification, payment and access control applications.Card Emulation
Conti.. This NFC mode enables mobile devices to more easily interact with each other (i.e., each phone has to be equipped with NFC and the enabling applications) to quickly launch a mobile communications bearer for sharing data with each other, whether to exchange business cards, photos, documents or otherPeer to Peer type of personal information in “peer- to-peer” data transfers.
APPLICATION OF NFC NFC applications can be split into the following three basic categories: Touch and Go Touch and Confirm Touch and Connect
APPLICATION 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. Example for picking up an Internet URL from a smart label on a poster. Touch and go Mode of applicat ion
APPLICATION OF NFC 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.
APPLICATION OF NFC 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.Datatransfervia NFC
ADVANTAGES OF NFC Make payments or use coupons via devices, instead of credit or debit cards Transfer files and share documents Download information about objects, services or places from “smart posters” Display electronic identity documents, like air travel boarding passes Faster and easier payments Quick access to information
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.