Near field communication(nfc)

Near Field Communication(NFC)

By,Bhaumik GagwaniD012

What Is NFC ?

NFC is a short range high frequency wireless communication technology.

NFC is based on RFID(Radio Frequency Identification) technology at 13.56 MHz.

Its Operating distance is typically up to 10 cm.

Data exchange rate today is upto 424 kilobits/s.

Modes of NFC There are mainly two modes of NFC.1. Active Mode: In Active mode, both devices

with NFC chip generates an electromagnetic field and exchange data.

Two NFC enabled devices transfering data in active mode

2. Passive Mode: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“ operating in passive mode

Tags of NFC

The tag is a simple, thin device containing an antenna and a small amount of memory. It is a passive device, powered by a magnetic field. Depending on the tag type, the memory can be read only, rewritable, or writable once.There are mainly four type of Tags.

1. Tag Type 12. Tag Type 23. Tag Type 34. Tag Type 4

NFC Tag Type 1

Type 1 Tags are cost effective and ideal for many NFC applications.

Based on ISO-14443A standard Read and rewrite capable; also users can

configure the tag to be read-only 96 bytes of memory, expandable up to 2 kB Communication speed 106 kbits/s No data collision protection

NFC Tag Type 2Type 2 Tags are similar to Type 1 Tags and are

derived from the NXP/Philips MIFARE Ultralight tag. Based on ISO-14443A standard Read and rewrite capable; also users can configure

the tag to be read-only 96 bytes of memory, expandable up to 2 kB Communication speed 106 kbits/s Anticollision support Compatible products available in the market — NXP

MIFARE Ultralight

NFC Tag Type 3Type 3 Tags are derived from the nonsecure parts of Sony

FeliCa tags. These tags are costlier than Types 1 and 2. Based on the Japanese Industrial Standard (JIS) X 6319-4 Preconfigured at manufacture to be either read and

rewritable, or read-only Variable memory, up to 1 MB per service Supports two communication speeds: 212 or 424 kbits/s Anticollision support Compatible products available in the market — Sony

FeliCa

NFC Tag Type 4Type 4 Tags are similar to Type 1 Tags and are derived

from the NXP DESFire tag. Based on ISO-14443A standard Preconfigured at manufacture to be either read and

rewritable, or read-only Variable memory, up to 32 kB per service Supports three different communication speeds: 106,

212, or 424 kbits/s Anticollision support Compatible products available in the market — NXP

DESFire, SmartMX-JCOP

Application 1. 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.

Thescreenshot from a mobile device showing the confirmation message.

2.Touch and Connect:Linking two NFC-enabled devices to enable transfer of data such as downloading music, exchanging images.

Data transfer via 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

4. Some other applications of NFC:I. Access controls in office, hotels, airports,

print receipts to printer.II. Download music or video from a smart

poster.III. Exchange business cards, Pay bus or train

or air fare, Parking Tickets, Pay and purchase at Point of Sale Terminals

ADVANTAGES OF NFCHigh convenience to the user, because the

data exchange is done by bringing two mobiles together.

Reduces cost of electronic issuance .Secure communication. No special software. No manual configuration and settings.No search and pair procedure.

DISADVANTAGES OF NFCThe 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.

SOME DEVICES USING NFC TECHNOLOGYNexus S Google Nexus S 4G Samsung Galaxy S II Samsung Galaxy Note Galaxy NexusNokia 6212 ClassicNokia 6131 NFCNokia C7

FUTURE OF NFCNew generations of iPhone, iPod and iPad

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

On May 2, 2011, RIM announced the Blackberry Bold 9900, a new device that will use NFC technology.

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

CONCLUSIONMobile 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.

Thank You

Any Questions..??