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NEAR FIELD COMMUNICATION Presented By: Dheeraj Raja
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Page 1: Near field communication

NEAR FIELD COMMUNICATION

Presented By:Dheeraj Raja

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What is NFC??? • A short range, high frequency, low bandwidth and wireless

communication technology between two devices.• Based on RFID Technology.• Mainly aimed for mobile & handheld devices.

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Evolution of NFC• 2002- The technology was jointly developed by

Philips & Sony.• 2004- Nokia, Philips and Sony established the NFC

Forum.• 2006- Initial specifications for NFC tags are given.• 2006- Nokia 6131 was the first NFC enabled Phone.• 2010- Samsung Nexus S was the first Android NFC

enabled Phone.

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Working Principle• NFC works on the principle of RFID (Radio Frequency

Identification).• Types of Coupling in RFID:

BackScatter Coupling Capacitive Coupling Inductive Coupling.

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Operation Of NFC

• Near field communication is based on inductive-coupling.

• NFC works using magnetic induction between two antennas located within each other's 'near field’.

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Modes of Operation

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Modes Of Operation

• In Active mode, both devices with NFC chip generates an electromagnetic field and exchange data.

Two NFC enabled devices transfer-ring data in active mode

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Modes of Operation• In Passive mode, there is only one active device and

the other uses that field to exchange information.

A NFC-enabled mobile phone is paired with a RFID-tagged "smart poster"

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Applications of NFC

• NFC applications can be split into the following three basic categories:

Touch and GoTouch and ConfirmTouch and Connect

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Applications 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 application

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Applications 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.

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Applications 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.

Data transfer via NFC

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NFC Specifications

• NFC operates at 13.56 MHz and at rates ranging from 106 kbit/s to 424 kbit/s.

• NFC always use an initiator and a target; the initiator actively generates an RF field that can power a passive target.

Initiator Device

Target

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Comparison with Existing Technology

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Advantages Of NFC

• High convenience to the user, because the data exchange is done by bringing two mobiles together.

• Secure communication. • No special software. • No manual configuration and settings.• No search and pair procedure.

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Limitations 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.

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Some Devices using NFC Technology

• Nexus S• Google Nexus S 4G • Samsung Galaxy S II • Samsung Galaxy Note • Galaxy Nexus• Nokia 6212 Classic• Nokia 6131 NFC

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Devices with NFC Technology

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Future of NFC• New generations of iPhone, iPod and iPad products

would reportedly be equipped with NFC capability which would enable small-scale monetary transactions.

• Recently, Microsoft announced that all Windows 8 Phone devices will make use of the NFC technology.

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