Near Field Communication seminar presentation

7/29/2019 Near Field Communication seminar presentation

1/31

NEAR FIELD

COMMUNICATION

(GUIDED BY:MISS ANUJA V NAIR)

BY:

REJOY MENDEZ

ROLL NO:24

S7 ECE


2/31

OVERVIEW

INTRODUCTION

FEATURES OF NFC

TECHNOLOGICAL OVERVIEW

COMPARISON WITH OTHER TECHNOLOGY

SECURITY ASPECTS

APPLICATIONS

CONCLUSION


3/31

INTRODUCTION

Wireless short range communication technology.

Allows intuitive initialization of wireless networks .

NFC also works in dirty environment.

NFC does not require line of sight.

Easy and simple connection method.

Provides communication method to non-self

powered devices


4/31


5/31

FEATURES OF NFC

Based on RF Technology at 13.56 Mhz .

Operating distance upto 20 cm, typically

even less.Data exchange rate up to ~1 Mbit planned.

Compatible with todays field proven

RFID technology.


6/31

TECHNOLOGICAL

OVERVIEW COMMUNICATION MODES .

CODING AND MODULATION .

INITIATOR AND TARGET.

COLLISION AVOIDANCE.

PROTOCOL FLOW.

OPERATING MODES OF NFC.


7/31

COMMUNICATION MODES :

ACTIVE MODE: Two active devices

communicate with each other. Each device

has to generate its own RF field ,if it wants

to send data.

PASSIVE MODE: In this mode commn

takes place between an active and a passivedevice.


8/31

CODING AND MODULATION

MANCHESTERCODING

MODIFIEDMILLER CODING


9/31

NFC DATA TRANSFER RATE

RATE ACTIVE DEVICE PASSIVE DEVICE

424 kBps Manchester,10% ASK Manchester,10% ASK

212 kBps Manchester,10%ASK Manchester,10% ASK

106 kBps Modified Miller,100%

ASK

Manchester,10% ASK


10/31

INITIATOR & TARGET

INITIATOR TARGET

ACTIVE POSSIBLE POSSIBLE

PASSIVE NOT POSSIBLE POSSIBLE

Possible Combinations Active/Passive with Initiator/Target

COLLISION AVOIDANCE

Usually misunderstandings are rather rare, since thedevices have to be placed in direct proximity.

The protocol proceeds from the principle: listen beforetalk.If the case occurs that two or more targets answer atexactly the same time, a collision will be detected by theinitiator.


11/31

PROTOCOL FLOW

INITIALIZATION The collision avoidance. Selection of targets.

Initiator determines the communicationmode and chooses the transfer speed.

TRANSPORT PROTOCOL :

Activation of the protocol . The data exchange protocol, and

The deactivation of the protocol including theDeselection and the Release.


12/31


13/31

OPERATING MODES OF NFC

NFC devices are unique in that they can

change their mode of operation to be in

reader/writer mode, peer-to-peer mode, or

card emulation mode.

The different operating modes are based onthe ISO/IEC 18092 NFC IP-1 and ISO/IEC

14443 contactless smart card standards.


14/31

PEER TO PEER COMMUNICATION

o In Peer-to-Peer mode, two NFC devices can

exchange data.

o For example, you can share Bluetooth or WiFi

link set up parameters, and exchange data such as

virtual business cards or digital photos.

o Peer-to-Peer mode is standardized on the

ISO/IEC 18092 standard.


15/31

ISO18092

This International Standard defines communicationmodes for (NFCIP-1) using inductive coupled devicesoperating at the centre frequency of 13,56 MHz forinterconnection of computer peripherals.

It also defines both the Active and the Passivecommunication modes of NFCIP-1 to realize acommunication network using NFC devices.

This Standard specifies modulation schemes,codings, transfer speeds, and frame format of the RFinterface, as well as protocol .


16/31

READER/WRITER MODE

In reader/writer mode, the NFC deviceis capable of reading NFC Forummandated tag types, such as in the

scenario of reading an NFCSmartposter tag.

The reader/writer mode is on the RFinterface compliant to the ISO 14443and FeliCa schemes.


17/31

ISO14443

ISO/IEC 14443 defines a proximity cards usedfor identification of standard credit card form.

Describes two types of cards: type A and typeB,differ in modulation methods, codingschemes and protocol initializationprocedures but same transmission protocol.

Component terms : PCD proximity couplingdevice (or reader) ,PICC proximity integrated

circuit card


18/31

TAG EMULTION MODE

The NFC device itself acts as an NFC tag,

appearing to an external reader much the

same as a traditional contactless smartcard. This enables contactless payments

and eticketing .


19/31

COMPARISON WITH OTHERTECHNOLOGIES

RFID

BLUETOOTH and

INFRARED


20/31

RFID & NFC

In RFID systems basically two elements

* Tags or transponders

* Readers or interrogators NFC is a short range wireless connectivitytechnology which combines RFID andinterconnection technologies.NFC systems

consist of two elements:* The Initiator

* The Target


21/31

LIMITATIONS OF RFID:

* Cost of spreading the readers;

* Localization; at the moment, this is given within a

quite a large area, and

* Memory capacity of the tags.

LIMITATIONS SOLVED BY NFC TECHNOLOGY:

* An NFC initiator device can move to any place.

* The localization will be exact because of the need tobring the target and the initiator very close together.

* The initiator can make use of the memory of the

device, associating it with the memory of the objective.


22/31

COMPARISON WITH

BLUETOOTH AND INFRARED

NFC simplifies the way consumer devicesinteract.

The problem with infrared.

The significant advantage over Bluetooth isthe shorter set-up time, (


23/31


24/31

NFC WITH BLUETOOTH


25/31

SECURITY ASPECTS

EAVESDROPPING

DATA DESTRUCTION

DATA MODIFICATION

DATA INSERTION

MAN-IN-THE-MIDDLE-ATTACK


26/31

APPLICATIONS

In mobile phones there are three mainuse cases for NFC: card emulation,reader mode, P2P mode .

Mobile ticketing in public transport.

Mobile payment

Smart poster Bluetooth pairing

Mobile commerce


27/31


28/31

CONCLUSION

In summary, Near Field Communication is anefficient technology for communications with short

ranges. NFC is not a fashionable nice-to-havetechnology, but actually a technology that makespeoples lives easier easier to pay for goods andservices, easier to use public transport, and easier toshare data between devices.


29/31

REFERENCES

Jos Bravo, Ramn Hervs , Gabriel Chavira From Implicit toTouching Interaction: RFID and NFC Approaches ,SixthInternational Conference on the Management of MobileBusiness (ICMB 2008)0-7695-2803-1/07 $25.00 2008 IEEE

Anokwa, Y., et al. A User Interaction Model for NFC EnabledApplications . in IEEE International Conference on PervasiveComputing and Communications Workshops 2007.

Near Field Communication and Bluetooth Bridge System forMobile Commerce C.Y. Leong, K. C. Ong , K. K. Tan*, O.P.

GAN 2006 IEEE International Conference on IndustrialInformatics

WIKIPEDIA

www.nfcforum.com

www.ecma-international.org


30/31


31/31

Near Field Communication seminar presentation

Documents

Transcript of Near Field Communication seminar presentation