SEMINAR ON

NEAR FIELD COMMUNICATIONPresented by : Gopinath Mahakud

Regd. No : 1305106010

Guided by : Mr. Debasis Gountia

Department of

Computer Science and Application

College of Engineering and Tchnology

Biju Patnaik University of Technology

Contents Introduction

Communication Mode

Tag and Reader

Operating Modes

Architecture

Application

Advantages

Disadvantages

Future Technology

Conclusion

What is NFC NFC (Near Field Communication)

Communication technology based on radio waves at 13.56 MHz frequency

Short range (<= 10 cm theoretical, 1-4 cm typical)

Low speed (106 / 216 / 424 kbps) => 13-50KBytes per sec

Low friction setup (no discovery, no pairing)

Setup-time < 0.1 Sec

Communication roles:

Master Device: NFC Initiator (starts communication, typically a device)

Slave Device: NFC Target (passive tag or device)

Communication modes NFC devices support two communication modes.

1- Active In this mode, the target and the initiator devices have power

supplies and can communicate with one another by alternate signal

transmission.

2- Passive In this mode, the initiator device generates radio signals and the

target device is powered by this electromagnetic field. The target

device responds to the initiator by modulating the existing

electromagnetic field.

Tag and reader NFC-based communication between two devices is possible when one device

acts as a reader/writer and the other as a tag.

1- Tag 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.

2- Reader The reader is an active device that generates radio signals to communicate with

the tags. The reader powers the passive device when the two are engaged in the

passive mode of communication.

NFC Device Operating Modes How to interact with it?

Reader-Writer Mode

Peer-To-Peer Mode

Tag Emulation Mode

Reader-Writer Mode

Mobile Device is able to read external tagsTag content: Text, URI (WebLink, Phone Number), SmartPoster

Like QR-Codes, but faster

No need to launch an application

With Android, an intent is thrown if a tag is detected

Different form factors for NFC tags:

tags, stickers, cards, key fobs, clocks

Peer-To-Peer Mode

Bidirectional P2P connection to exchange data between devices

Applications Exchange of vCards (e.g. XING)

Hand-over of Tickets & P2P Payment

Web-page sharing, Youtube-video-sharing

Application sharing

Exchange of device info in order to establish a faster connection

automatically (e.g. Bluetooth)

Tag Emulation An NFC-enabled phone acts as a reader when

in contact with tags. In this mode, the phone

can act as a tag or contactless card for existing readers.

OPERATION OF NFC

• Near field communication is based on inductive-coupling.

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

Air-core Transformer

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

Touch and go Mode of application

APPLICATION OF NFC

Movie buff gathering info about a movieusing his NFC enabled Mobile Phone

APPLICATION OF NFC

• Touch and Confirm

APPLICATION OF NFC

Thescreenshot from a mobile device showing the confirmation message.

APPLICATION OF NFC

• Touch and Connect

Data transfer via NFC

ADVANTAGES OF NFC

• High convenience to the user, because the dataexchange 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 operatedonly with devices under a short range i.e around 10cm.

• The data transfer rate is very less at about 106kbps,212 kbps and 424kbps.

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

FUTURE SCOPE

• New generations of iPhone, iPod and iPad products would reportedlybe equipped with NFC capability which would enable small-scalemonetary transactions.

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

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

CONCLUSION

• Mobile handsets are the primary target for NFC and soon NFC will beimplemented in most handheld devices. Even though NFC have theshortest range among radio frequency technologies, combining themwith other technologies like Bluetooth or Infrared can increase itsrange of applications.

THANK YOU