1. SEMINAR ON
NEAR FIELD COMMUNICATION
Presented 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
2. Contents
Introduction
Communication Mode
Tag and Reader
Operating Modes
Architecture
Application
Advantages
Disadvantages
Future Technology
Conclusion
3. 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)
4. 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.
5. 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.
6. 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.
7. NFC Device Operating Modes
How to interact with it?
Reader-Writer Mode
Peer-To-Peer Mode
Tag Emulation Mode
8. Reader-Writer Mode
Mobile Device is able to read external tags
Tag 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
9. 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)
10. 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.
11. 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’.
19. 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.
20. 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.
21. 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
22. FUTURE SCOPE
• New 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.
23. 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, combining them
with other technologies like Bluetooth or Infrared can increase its
range of applications.
