Near field communication (NFC)

Near Field Communication(NFC)
Jagadish Mohanty
Regd No-1721109165,8th Semester
Computer Science and Engineering
Parala Maharaja Engineering College
March 6, 2020
Jagadish Mohanty (8th Semester,CSE) Near Field Communication(NFC) March 6, 2020 1 / 17

Contents
1 Introduction
2 Working Of NFC
3 NFC Mode Of Operation For Device Communication
4 NFC VS. Other Technology
NFC vs RFID
NFC vs Bluetooth
NFC vs QRcode
5 NFC Application
6 Advantages
7 Disadvantages
8 Conclusion
9 References

Introduction
Near Field Communication (NFC) is a wireless communication technology extension of
Radio Frequency Identification (RFID) technology that operates in short range communi-
cation.
NFC operates on low-range 13.56 MHz frequency within distance from 4cm to 10cm and
has a maximum data rate of 424 kilobits per second (kbps).
In an NFC communication, two devices are needed. First device is called the initiator which
is an active device and is responsible for starting the communication, whereas second device
is called the target and responds to the initiator’s requests.The target device may be active
or passive.
The communication starts when the active device gets close to the target and generates a
13.56 MHz magnetic field and powers the target device.
The NFC technology works via magnetic field induction and operates on an unlicensed
radio frequency band. Also it includes an embedded energy source component whereas
the target can be a RFID card, tag or an NFC device which gives the reply to initiator’s
request.

NFC Mode Of Operation For Device Communication
Reader/Writer mode
In Reader/Writer mode of operation the
application transfers data in NFC forum
deﬁned message format. In this mode
the NFC enabled mobile phone can per-
form read/write operation on NFC tags.
In Reader Mode, NFC initiator reads data
from the NFC tag where as in the writer
mode, initiator writes data in to the tag. It
should be noted that Reader/Writer mode
of communication is not secure.
Figure: Read And Write Mode

Working Of Reader/Writer mode
When we are accessing the data or information using smart phones from the NFC tag .
So in this mode the active device like tablets reads or writes on the NFC tag using the
principle of Electromagnetic Induction.
Now it read the information from the NFC tag.
The active device generate the radio waves carrier frequency of 13.56 MHz.
So the waves used to get coupled to the antenna of passive tag and from this electromag-
netic wave NFC tag receives the power.
So this time wiring electromagnetic field generates the EMF or voltage in this passive tag.
The generated voltage is rectified by using the rectifier. It is use to power up the chip
inside the NFC tag.

Now this small chip generally comprise of clock, EPROM, rectiﬁer circuit and the small
controller.
Once the chip is powered up then the tag response back to the active device by the
technique which is known as the load modulation.
In this technique the tag use the internet clock of the chip and generates the auxiliary
carrier frequency of the 848 KHz.
Now depending upon the stored data inside this chip the load which is connected in
parallel to antenna is turned on and oﬀ. In this way the data is sent back to the active
device.
By the principle of electromagnetic Induction the passive tag use the power and in the
load modulation the data is sent back to the active device.

Card Emulation Mode
In card emulation mode, the NFC enabled
mobile device acts as a contactless smart
card. The examples of smart card are debit
card, credit card, access cards etc. Data
transfer in this mode is highly secure.
Figure: Card Emulation Mode

Peer to Peer mode
Peer to peer mode supports link level com-
munication. It supports two NFC enabled
device to exchange information such as a
text message, contact record or data of any
other kind. NFCIP-1 and LLCP are the two
standardized options in peer to peer mode.
Figure: Peer to Peer Mode

NFC VS. Other Technology
NFC VS. RFID
RFID work on diﬀerent frequency but
NFC work on 13.56MHz frequency.
RFID perform one way communica-
tion. Where as NFC perform two way
communication.
Figure: NFC vs RFID

NFC VS. Bluetooth
Bluetooth takes more time for opera-
tion as compare to NFC.
It is useful in crowded location.
Figure: NFC vs Bluetooth

NFC VS. QRcode
Quick Response Code(QRcode) scan
then conﬁrm it after working but NFC
tag just tab for working.
NFC more secure from QRcode.
Figure: NFC vs QRcode

NFC Application
Figure: NFC Application

Advantages and Disadvantages
Advantages
It is very convenient to perform payments and other transactions using smartphones with
the help of wallet app.
It helps both customers and enterprises.
It provides secured access for students and employees in their premises.
It provides more security compare to magnetic strip based debit and credit cards.
It does not require search and pair procedure like bluetooth and other methods to establish
connectivity.
It does not require manual conﬁgurations and settings.
It is compatible with existing RFID networks.
Disadvantages
It can only works in shorter distances.
It is very expensive for the companies to adopt the NFC enabled devices.
Though it is more secure compare to credit/debit card based system, it is not completely
risk free.

Conclusion
Conclusion
NFC can be combined with existing infrared, Bluetooth technologies for improving the range of
NFC. NFC oﬀers a secure and simple way for transferring data between two electronic devices.
Another advantage of NFC is its compatibility with RFID technology. NFC is actually based
on RFID technology. RFID uses magnetic ﬁeld induction to initiate communication between
electronic devices in close vicinity.NFC operates at 13.56MHz and has 424kbps maximum data
transfer rate. NFC is complementary to Bluetooth and 802.11 with their long distance capa-
bilities. This paper discussed the concepts of NFC technology in a detailed manner including
working, transmission details, protocols and standards, application scenarios, future market,
security standards and vendors’ chipsets available for this standard.

References
International Journal on Cybernetics & Informatics (IJCI) Vol. 4, No. 2, April 2015, Near
Field Communication (NFC) Technology: A Survey.
International Journal of Engineering & Technology, 7 (4.31) (2018) 298-305, Near Field
Communication (NFC) Technology Security Vulnerabilities and Countermeasures.
IJCSNS International Journal of Computer Science and Network Security, VOL.12 No.2,
February 2012, Near Field Communication (NFC).
A text book of RFID Design Principles.
10.1109/IC3I.2014.7019680,2014 International Conference on Contemporary Computing
and Informatics (IC3I), NFC Technology: Current and Future Trends in India.
NFC Forum. Home. http://nfc-forum.org/. Accessed September 3, 2015.
Rohde & Schwarz, NFC technology and measurements White Paper, June 2011.
Ecma International, Near Field Communication - White Paper, 2005, Ecma/TC32-TG19/2005/
Available: http://www.ecma-international.org/

Thank You

Near field communication (NFC)

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