Internet of Things and its Enabling Technologies - RFID

Internet of Things -
Enabling Technologies
RFID
-By
Swetha Kogatam
SJSU ID : 009439339

RFID technology and its applications
in Internet of Things (IoT)
Authors :
-Xiaolin Jia, Quanyuan Feng , Taihua Fan, Quanshui Lei ;
-School of Computer Science and Technology, Southwest University of
Science and Technology, Mianyang, China;
-School of Information Science and Technology, Southwest Jiaotong
University, Chengdu, China
Published in: Consumer Electronics, Communications
and Networks (CECNet), 2012 2nd International Conference
Date of Conference : 21-23 April 2012
Conference Location : Yichang
Publisher: IEEE

What is RFID ?
Radio frequency identification system (RFID) is an
automatic technology and aids machines or
computers to identity objects, record metadata or
control individual target through radio waves.
The RFID technology was first appeared in 1945, as
an espionage tool for the Soviet Union.
Main Advantage:
Is the automated identification and data capture
that promises wholesale changes across a broad
spectrum of business activities and aims to reduce
the cost of the already used systems such as bar
codes. 3

RFID consists of
1. Tags (transmitters/ responders) : The tag is a microchip
connected with an antenna, which can be attached to an
object as the identifier of the object.
2. Readers (transmitters
/ receivers) : The RFID
reader communicates
with the RFID tag using
radio waves.

RFID & IOT
When the RFID readers abided by appropriate
communication protocols are connected to the terminal
of Internet, the readers distributed throughout the world
can identify, track and monitor the objects attached with
tags globally, automatically, and in real time, if needed.
This is the so-called Internet of Things (IOT).
IOT first became popular through the Auto-ID Center and
related market analysts publications and RFID is often
seen as a prerequisite for the IOT.

IOT ARCHITECTURE
The IOT system architecture is
generally divided into three
layers:
1. the perception layer,
2. the network layer,
3. the service layer (or
application layer)

1. Perception layer is the information origin and the core layer of
IOT. All kinds of information of the physical world used in IOT are
perceived and collected in this layer
Ex : wireless sensors network (WSN), tags and reader-writers etc.
2. Network layer also called as transport layer, includes access
network and core network, provides transparent data
transmission capability.
The information from perception layer can be sent to the
upper layer using existing mobile communication network.
3. Service layer also called application layer, includes data
management sub-layer and application service sub-layer.
 The data management sub-layer provides processing complex
data and uncertain information

RFID System
RFID systems are composed of three main components:
1. RFID tags
2. RFID reader
3. Application
system
RFID tags have the following essential components in
common:
antenna, integrated circuit, printed circuit board
8

RFID Tag
Also known as transponders (transmitter/responder), are
attached to the objects to count or identify.
Tags could be either active or passive.
The main responsibility of antenna of RFID tag is to transmit
and receive radio waves for the purpose of communication.
The antenna is also known as the coupling mechanism, which
can transform the energy in the form of electromagnetic
radiation. This is the way the tag and reader communicating
each other.
The integrated circuit (IC) is a packaged collection of discrete
components that provide the brains for the tag and transmit
the tag’s unique identifier (ID).
The printed circuit board (PCB) is the material that holds the
tag together. The circuit board may be rigid or flexible, and is
composed of many different types of materials, depending on
the type and purpose of the tag. 9

Tags are built to comply with a categorization called a class.
EPCglobal has defined six classifications for RFID tags (0 to 5)
Class 0/class 1: These classes provide the basic radio
frequency (RF) passive capability. Class 0 is factory-programmed.
Beyond class 0, including class 1, the tags are
user-programmable.
Class 2: Additional functionality is added, which includes
encryption and read-write RF memory
Class 3: Batteries are found on board that will power logic in
the computer circuit. Class 3 provides longer range and
broadband communications
Class 4: Active tags are part of the definition of class 4 tags.
Peer-to-peer communications and additional sensing arc also
included.
Class 5: Class 5 tags contain enough power to activate other
tags and could be effectively classified as a reader

RFID Reader
The reader is responsible for orchestrating the
communication with any tags in its read range and then
presenting the tags’ data to an application that can make
use of the data.
Main functions are to
 activate the tags,
 structure the communication sequence with the tag and
 transfer data between the application software and tags
Readers in all systems can be reduced to two
fundamental functional blocks:
1. Control system and
2. High frequency (HF) interface
11

HF interface performs the following functions :
1.Generation of high frequency transmission power to activate
the transponder and supply it with power;
2.Modulation of the transmission signal to send data to the
transponder;
3.Reception and demodulation of HF signals transmitted by a
transponder.

Control unit performs the following functions:
1.Communication with the application software and the
execution of commands from the application software;
2.Signal coding and decoding. In more complex systems the
following additional functions are available
3.Execution of an anti-collision algorithm;
4.Encryption and decryption of the data to be transferred
between transponder and reader;
5.Performance of authentication between transponder and
reader.
6.Control of the communication with a transponder
Application system:
Also called data processing system, can be an application
or database, depending on the application
Application software initiates all readers and tags
activities
13

Evolution of IOT
The evolution of IOT is coinciding with that of RFID and sensor
technologies. RFID technology is a very important and
fundamental groundwork for IOT.
14

CHALLENGES & CONCLUSION
Collision Problems
Security and Privacy Concerns
Other Challenges
Cost , Design & Integration into existing systems
CONCLUSION
• The IOT uses a variety of information sensing identification
device and information processing equipment, such as RFID,
WSN, GPRS, etc. combining with the Internet to form an
extensive network in order to informationize and intelligentize
the entities or objects.
• This paper analyzes the applications and challenges of RFID
technology, which is the important and foundational
component of IOT.
15

Internet of Things and its Enabling Technologies - RFID

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