nfc-full presentation

Near

Field

Communication

DILIN RAJ D.SMCA S2

ROLL NO:14-----NFC----MCA-COLLEGE OF ENGINEERING TRIVANDRUM 1

What Is NFC ?

Short range high frequency wireless communication technology.

Aimed for mobile or handheld devices.

Communication is established by touching the two device or keeping them in a proximity of a few centimeters (up to 10 cm) .

Allows communication between Two devices

Initiator and target-----NFC----MCA-COLLEGE OF ENGINEERING TRIVANDRUM 2

NFC allows two-way communication between endpoints.

It operates frequency band of 13.56 MHz, with a bandwidth of 14 kHz.

Working distance up to 10 cm .

Supported data rates: 106, 212 and 424 Kbit/s

For two devices to communicate using NFC, one device must have an NFC reader/writer and one must have an NFC tag

Features

-----NFC----MCA-COLLEGE OF ENGINEERING TRIVANDRUM 3

EVOLUTION OF NFC TECHNOLOGY

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

In 2006

First mobile phone( nokia 6131) with

NFC released by NOKIA.

In 2010

First android phone

SAMSUNG NEXUS S with NFC support

released.-----NFC----MCA-COLLEGE OF ENGINEERING TRIVANDRUM 4

NFC Reader It is microcontroller-based with an integrated circuits that is capable of generating radio frequency at 13.56 MHz . The reader continuously emits RF signals, and keeps observing the received RF signals for data.


NFC TagAn NFC Tag incorporating a silicon memory chip connecting to external antenna. Tag does not have its own power source (passive). The passive tag absorbs a small portion of the energy emitted by the reader (phone), and starts sending modulated information when sufficient energy is acquired from the RF field generated by the reader.


• 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

Active mode

• In Passive mode, there is only one active device and the other uses that field to exchange information.

Passive mode

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


NFC devices communicate via magnetic field induction, where two antennas are located within each other's near field, effectively forming an air-core transformer.

The reader continuously generates an RF carrier sine wave (at 13.56 MHz), watching always for modulation to occur. Detected modulation of the field would indicate the presence of a tag.

Operation Of NFC


A tag enters the RF field generated by the reader. Once the tag has received sufficient energy to operate correctly, it divides down the carrier and begins clocking its data to an output transistor, which is normally connected across the coil inputs.

The tag’s output transistor shunts the coil, sequentially corresponding to the data which is being clocked out of the memory array.

Shunting the coil causes a momentary fluctuation of the carrier wave, which is seen as a slight change in amplitude of the carrier.

The reader peak-detects the data and processes the result according to the Manchester Coding

Operation Of NFC


Mancheste r Cod ing

• A low-to-high transition expresses a 0 bit, whereas a high-to-low transition stands for a 1 bit.

Operation Of NFC


Reader/writer mode

Peer-to-Peer mode

Card Emulation mode

Modes of Operation


Technology-enabling: NFC facilitates fast and simple setup of wireless technologies, (such as Bluetooth, Wi-Fi, etc.)Secure: NFC transmissions are secure due to short range communicationInteroperable: NFC works with existing Contactless card technologiesSecurity-ready: NFC has built-in capabilities to support secure applications

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


Application of NFC


NFC and Mobile Payment

A customer makes his payment through mobile phone using NFC

Application of NFC


Peer-to-peer

Speakers (touch to connect)

Smart Tags

Application of NFC


ADVANTAGES OF NFC

• High 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 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 but it is revolutionary due to it’s security, compatibility, user friendly interface, immense applications etc


THANK YOUTHANK YOU


QUESTIONS
