NFC ppt

1. Near Field Communication
Presented by
G. Sai Charan

2. CONTENTS
1. What is NFC?
2. Operation of NFC
3. Modes of operation
4. Comparing with existing technologies
5. Pros and cons
6. Applications
7. Conclusion

3. WHAT IS NFC???
 NFC is wireless technology which provides
communication between two mobile phones
which contain NFC tags, using short range radio
waves.
 Both devices can communicate with each other
using NFC technology when they touch each other
or brought very close to each other .
 NFC is an extension of Radio frequency
identification or RFID technology.

4.  NFC is compatible with
RFID infrastructure.
 NFC-based
communication between
two devices is possible
when one device acts as a
reader/writer and the
other as a tag.

5. 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’.
 Operating frequency is 13.56 MHz. data rate 106Kbps
to 424 Kbps.

6. MODES OF OPERTAION
MODES OF
OPERATION
PASSIVE
MODE
ACTIVE
MODE

7. MODES OF OPERATION
 Active mode:
Both Initiator and Target device communicate by
alternately generating their own field.
A device deactivates its RF field while it is waiting
for data.
 Passive mode:
The Initiator device provides a carrier field and the
target device answers by modulating existing field.
In this mode, the Target device may draw its
operating power from the Initiator.

8. COMPARISON WITH EXISTING TECHNOLOGY
Bluetooth IrDA NFC Benefits of NFC
Network
Type
Point-to-
multipoint
Point-to-point Point-to-point Easy setup
Bring close to
pair
Range 10m 1m <0.1m Safe, suitable for
crowded areas
Speed 721 Kbps 115 Kbps 424 Kbps Improving to
1Mbps
Setup time 6s 0.5s <0.1s Fast transactions
Modes Active-active Active-active Active-active
Active-passive
Compatible
with RFID
No No Yes Work with
existing
infrastructure
Cost Moderate Low Low Affordable
Power
consumption
High Low Low Battery saver

9. ADVANTAGES OF NFC
 High convenience to the user, because the data
exchange is done by bringing two mobiles together.
 It is bidirectional.
 Doesn’t require line of sight.
 Provides communication to non self powered devices.
 Reduces cost of electronic issuance.
 No special software.
 No search and pair procedure.

10. DISADVANTAGES
 Not enough NFC enabled mobile devices on the
market yet.
 Very less data transfer rate
 Range is very less
 Security issues
• Eavesdropping
• Data corruption
• Data manipulation
• Imposter attacks
• Theft

11. APPLICATIONS
 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.

12. APPLICATIONS
 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.

13. APPLICATIONS
 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.

14. APPLICATIONS

15. CONCLUSION
 NFC is an efficient technology for communication
within short ranges. Another significant advantage is
its compatibility with existing RFID infrastructure.
Also combining with existing technologies like
Bluetooth or Infrared can increase its range of
applications.

16. THANK YOU
ANY QUERIES?