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Thursday, 14 April 2011

NFC an emerging technology

What is NFC?

Near Field Communication (NFC) technology makes life easier and more convenient for consumers around the world by making it simpler to make transactions, exchange digital content, and connect electronic devices with a touch.

A standards-based connectivity technology, NFC harmonizes today's diverse contactless technologies, enabling current and future solutions in areas such as:

Access control
Consumer electronics
Information collection and exchange
Loyalty and coupons

Key Benefits of NFC

NFC provides a range of benefits to consumers and businesses, such as:

Intuitive: NFC interactions require no more than a simple touch
Versatile: NFC is ideally suited to the broadest range of industries, environments, and uses
Open and standards-based: The underlying layers of NFC technology follow universally implemented ISO, ECMA, and ETSI standards
Technology-enabling: NFC facilitates fast and simple setup of wireless technologies, such as Bluetooth, Wi-Fi, etc.)
Inherently secure: NFC transmissions are short range (from a touch to a few centimeters)
Interoperable: NFC works with existing contactless card technologies
Security-ready: NFC has built-in capabilities to support secure applications
Peer-to-peer communication
Payment & ticketing

How NFC works

NFC is a short-range, standards-based wireless connectivity technology, based on RFID technology that uses magnetic field induction to enable communication between electronic devices in close proximity. It provides a seamless medium for the identification protocols that validate secure data transfer. This enables users to perform intuitive, safe, contactless transactions, access digital content and connect electronic devices simply by touching or bringing devices into close proximity.
NFC operates in the standard unlicensed 13.56MHz frequency band over a distance of up to around 20 centimetres. Currently it offers data transfer rates of 106kbit/s, 212kbit/s and 424kbit/s, and higher rates are expected in the future.
For two devices to communicate using NFC, one device must have an NFC reader/writer and one must have an NFC tag. The tag is essentially an integrated circuit containing data, connected to an antenna, that can be read and written by the reader.
There are two modes of operation covered by the NFC protocol: active and passive. In active mode, both devices generate their own radio field to transmit data. In passive mode, only one device generates a radio field, while the other uses load modulation to transfer data. The NFC protocol specified that the initiating device is responsible for generating the radio field in this case.
The passive mode of communication is very important for battery-powered devices like mobile phones and PDAs that need to prioritize energy use. The NFC protocol enables such devices to be used in power-saving mode, so that energy can be conserved for other operations.


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