It’s all about Wireless

Communications
International Staff Week
Almeria, Spain, 6-10 Mai 2019

Dr Souhir FTIRICH

University of Gabes : Tunisia

Plan General Definitions 01

Classifications for wireless networks 02

Technologies and generations evolution 03

Challenges
04
Wireless networks : are networks that use radio
waves to connect devices, without the necessity
of using cables of any kind.

Wireless networks allow remote devices to connect without

difficulty, independently these devices are a few feet or
several kilometers away. And no need to break through
walls to pass cables or install connectors.
 Wireless
Technologies

This PowerPoint Template has clean and neutral

design that can be adapted to any content and
meets various market segments.
 Wireless Networks Classes

01 02 03
Wireless Networks can be
classified into 4 specific Your Text Here Your Text Here Your Text Here
Groups according to : You can simply You can simply You can simply
impress your audience impress your audience impress your audience
and add a unique zing. and add a unique zing. and add a unique zing.
• The area of Application

• The signal range 04 05 06

Your Text Here Your Text Here
You can simply You can simply
impress your audience impress your audience
and add a unique zing. and add a unique zing.
 Wireless Networks Classes
Short-range Networks Long-range Networks

wireless networks can be also divided into two

broad segments: short-range and long-range.
Short-Range Networks
These networks typically operate over unlicensed spectrum reserved for industrial,
sientific and medical (ISM) usage. The available frequencies differ from country to
country. The most common frequency bands are : at 2.4 GHz and at 5 GHz, which
are available across most of the globe

Short-Range Networks
In long-range networks, connectivity is typically provided by companies that sell
the wireless connectivity as a service. (WMAN) : a state or province, or an entire
country. The goal of long-range networks is to provide wireless coverage globally.
The most common long-range network is wireless wide area network (WWAN).
Long-Range Networks / Short-Range Networks
Short Range wireless connections : WPAN & WLAN

Insert the title of your subtitle Here

 Thank you
Insert the title of your subtitle Here
Wireless Networks Classes
Wireless Personal-Area Networks (WPAN)
1. Based on the IEEE 802.15 as a normalization (ETSI)

2. They permit communication in a very short range, of about 10 meters

3. WPAN involves little or no infrastructure at all.

4. Allows small, powerefficient, inexpensive solutions to be implemented

for a wide range of devices such as a smartphone and a PDA.

5. Low power demands and a low bit rate. Such kind of networks relay on
technologies such as Bluetooth, IrDA, ZigBee or UWB.
 WPAN : is it TRUE ?
Bluetooth :IEEE 802.15.1 standard

Originally designed for low power

consumption, short range, omni-directional
(point to multipoint) communications, cheap
devices.

NOW :Bluetooth-enabled
components using 2.4GHZ
and a coverage of 100m

Piconet and Scatternet concept !

WPAN : is it TRUE ?

Master/slave device
WPAN Panorama : range, bandwith
:optionnel
Short Range wireless connections : WPAN & WLAN

WLAN : wireless local Area Network : Wireless ETHERNET

1-WLANs are designed to provide wireless access in areas with a typical

range up to 100 meters and, mostly in home, school, computer laboratory, or
office environments

2-Based on IEEE 802.11standards, and marketed under the Wi-Fi brand name.
Due to competition, other standards such as HiperLAN never received much
commercial implementation
 WLAN : 802.11 classes
Insert the title of your subtitle Here

IEEE IEEE IEEE IEEE

802.11 802.11a 802.11b 802.11g

designed as a higher-bandwidth successor to

the IEEE 802.11b. An IEEE 802.11g access
point will support 802.11b and 802.11g
clients.
was the first accepted standard, supporting up to
11 Mbps in the 2.4 GHz unlicensed spectrum band.

It is the specifications more commonly known as Wi-Fi. 802.11a

uses radio frequencies in the 5 GHz band and supports theoretical
throughput of up to 54 Mbps

a family of different standards for

wireless local area networks.
WLAN DEPLOYMENT
 WLAN DEPLOYMENT

Get the right equipment

1 -A broadband Internet connection : is a high-speed Internet

2- A router : sending info between your network and the Internet. ...

3 -A wireless network adapter is a device connecting your PC to a wireless network.

Topologies : Infrastucture, Ad-hoc
Topologies : Infrastucture, ESS
Topologies : ESS and Roaming
Wireless Networks Classes
WMAN : wireless Metropolitain Area Network

•Based on IEEE 802.16 standard

which is often called WiMAX
(Worldwide Interoperability
for Microwave Access).

• WiMAX is a communications
technology that supports point to
multipoint architecture aimed at
providing high-speed wireless data
over metropolitan area networks
Wireless Networks Classes
WMAN vs WLAN

Wi-Fi is intended to coverage over relatively small areas, such as in offices

or hot spots,

WiMAX operates on two frequency bands, a mixture of licensed and

unlicensed band, from 2 GHz to 11 GHz and from 10 GHz to 66 GHz, and can transfer
around 70 Mbps over a distance of 50 km to thousands of users from a single base station,
Wireless Networks Classes : WMAN Deployment

Insert the title of your subtitle Here

Wireless Networks Classes : WMAN Deployment

Thank you
Insert the title of your subtitle Here
Wireless Networks Classes : WMAN Deployment

WMAN / WLAN

Thank you
Insert the title of your subtitle Here
 Wireless Networks Classes
WWAN : wireless Wide Area Network

1 - WWAN extend beyond 50 kilometers and typically

use licensed frequencies.

2- These types of networks can be maintained over large

areas, such as cities or countries, via multiple antenna
sites looked after by an internet services provider

3- two available technologies: Digital cellular telephony

and Satellites
Wireless Networks Classes
WWAN : wireless Wide Area Network : Statistics
 Wireless Networks Classes
WWAN : wireless Wide Area Network : Statistics & Generations
 Wireless Networks Classes
WWAN : wireless Wide Area Network : Generations
Wireless Networks Classes
WWAN : wireless Wide Area Network
Wireless Networks Classes
WWAN : wireless Wide Area Network

✔ Cellular concept
✔Areas divided into cells

- Each served by its own antenna

- Served by base station consisting of :
transmitter, receiver, and control unit
- Band of frequencies allocated
- Cells set up such that antennas of all
neighbors are equidistant (hexagonal
pattern)

✔Frequency Reuse
Wireless Networks Classes : FAP
WWAN : wireless Wide Area Network

Frequency Assignment Problems

Cellular systems provider allocates frequencies from a licensed spectrum

Constraints:
1- For any cell, interference from nearby cells within an acceptable minimum
2- For any cell, frequency bandwidth allocated sufficient to support the load in the cell

Objectives:
1- Minimize the total bandwidth (or width of the spectrum) allocated across all cells
2- Minimize call blocking probability
3- Minimize average interference
Wireless Networks Classes
WWAN : wireless Wide Area Network

Cluster of 7 cells, frequency re-use

Wireless Networks Classes
WWAN : wireless Wide Area Network
Cellular Systems Terms Architecture conceptStyle
Agenda
▪ BaseStation (BS) – includes an antenna, a controller,
and a number of receivers

▪ Mobile telecommunications switching office

(MTSO connects calls between mobile units)

▪Two types of channels available between mobile unit and BS

1- Control channels – used to exchange information having
to do with setting up and maintaining calls
2- Traffic channels – carry voice or data connection between users
Cellular Systems Terms
Architecture concept Agenda Style
Cellular Systems Terms Differences Between First and Second Generation Systems
Architecture concept Agenda Stye
Digital traffic channels – first-generation systems are almost purely
analog; second-generation systems are digital

Encryption – all second generation systems provide encryption

to prevent eaves dropping

Error detection and correction – second generation digital traffic

allows for detection and correction, giving clear voice reception

Channel access – second-generation systems allow channels to be

dynamically shared by a number of users
Cellular Systems Terms GSM Sub Systems : BSS, NSS, OSS
Architecture concept Age : BSSnda Stye
Base Station Subsystem (BSS)

-BSS : base station controller

and one or more (BTS)

- Each BTS defines a single cell;

Includes radio antenna, radio
transceiver and a link to BSS

-BSC reserves radio frequencies,

manages handoff of mobile
Cellular Systems Terms
GSM Sub Systems : BSS, NSS, OSS
Agenda Stye
Network Sub system (NSS) :
Architecture concept

▪Controls handoffs between cells in different BSSs

▪Authenticates users and validates accounts

▪Enables worldwide roaming of mobile users

▪Central element of NS is the mobile switching center (MSC)

Network Sub system (OSS) :

used by telecommunications service provider to manage their
networks (e.g., telephone networks). They support management functions
 Wireless Networks Classes
Radio Propagation : Path LOSS
Signal propagation
Propagation in free space always like light (straight line)
Path loss
Receiving power additionally influenced by
fading (frequency dependent)
shadowing
reflection at large obstacles
refraction depending on the density of a medium
scattering at small obstacles
diffraction at edges
Wireless Networks Classes
Radio Propagation : Path LOSS
Wireless Networks Classes
Radio Propagation : Path LOSS
 Wireless Networks Classes
Radio Propagation : 4G,5G : the Challenges
 Wireless Networks Classes
Radio Propagation : 4G,5G : the Challenges

Thank you
Insert the title of your subtitle Here
 Wireless Networks Classes
Radio Propagation : 4G,5G : the Challenges
 Wireless Networks Classes
Radio Propagation : 4G,5G : the Challenges
 Wireless Networks Classes
Radio Propagation : 4G,5G : the Challenges

Better Connectivity: which means that more devices can connect at the same time.
Reduced Latency: 5G will drastically reduce lag time or delays in.
Faster Connection: 5G speeds are predicted to be about 10x faster than is now possible with 4G connections.
One of the most significant benefits of 5G connection is the impact it has on the Internet of Things (IoT).
 Infographic Style
Insert the title of your subtitle Here

Your Text Here

Your Text Here

Your Text Here
You can simply
Your Text Here Your impress your
Text audience and add
Here a unique zing and
appeal to your
Your Text Here
Presentations.

Your Text Here

 Table Style
Insert the title of your subtitle Here

Text Here Text Here Text Here Text Here

$25 $35 $15 $20

Content Text Content Text Content Text Content Text

Your Text Here Your Text Here Your Text Here Your Text Here

Your Text Here Your Text Here Your Text Here Your Text Here

Your Text Here Your Text Here Your Text Here Your Text Here

You can simply You can simply You can simply You can simply
impress your impress your impress your impress your
audience and add audience and add audience and add audience and add
a unique zing a unique zing a unique zing a unique zing
 Infographic Style
Insert the title of your subtitle Here

Your Text Here

You can simply impress your
audience and add a unique zing
and appeal to your Presentations.

Your Text Here Your Text Here

You can simply impress your You can simply impress your
audience and add a unique zing audience and add a unique zing
and appeal to your Presentations. and appeal to your Presentations.

Your Text Here

You can simply impress your
audience and add a unique zing
and appeal to your Presentations.
 Infographic Style
Insert the title of your subtitle Here

Get a modern PowerPoint Presentation that is

beautifully designed. Easy to change colors,
Portfolio
photos and Text. You can simply impress your
audience and add a unique zing and appeal to your
Presentations.
Presentation
 Table Style
Insert the title of your subtitle Here

Get a modern PowerPoint Presentation that is

PowerPoint Presentation beautifully designed. You can simply impress your
audience and add a unique zing.

01
Easy to change colors, photos and
Text. 60%
02 Your Text Here
55%
Get a modern PowerPoint
03 Presentation that is beautifully
designed. 40%
 Worldmap Style
Insert the title of your subtitle Here

Your Text Here

Get a modern PowerPoint Presentation that
is beautifully designed. Easy to change
colors, photos and Text. You can simply
impress your audience and add a unique
zing and appeal to your Presentations. Get a
modern PowerPoint Presentation that is
beautifully designed. Easy to change colors,
photos and Text. Get a modern PowerPoint
Presentation that is beautifully designed. 60%

Your Text Here

60% You can simply impress your
audience and add a unique zing.
 Infographic Style
Insert the title of your subtitle Here

Your Your
Content Content
Here Here

Your Your
Content Content
Here Here

Get a modern PowerPoint Presentation that is beautifully designed. Easy to change colors, photos and
Text. You can simply impress your audience and add a unique zing and appeal to your Presentations. Get a
modern PowerPoint Presentation that is beautifully designed. Easy to change colors, photos and Text.
 Infographic Style
Insert the title of your subtitle Here

Your Text Here

01 Your Text Here
You can simply impress your You can simply impress your
audience and add a unique zing audience and add a unique zing
and appeal to your Presentations. and appeal to your Presentations.

04 02

Your Text Here Your Text Here

You can simply impress your You can simply impress your
audience and add a unique zing audience and add a unique zing
and appeal to your Presentations. and appeal to your Presentations.
03
 Infographic Style
Insert the title of your subtitle Here
Your Text Here
You can simply impress your audience
and add a unique zing.

Your Text Here

Your Text Here
You can simply impress
You can simply impress
your audience and add a
your audience and add a
unique zing.
unique zing.

Your Text Here

Your Text Here
You can simply impress
your audience and add a You can simply impress
unique zing. your audience and add a
unique zing.
Infographic Style
Insert the title of your subtitle Here

Your Text Here

You can simply impress
your audience and add a
unique zing.

Your Text Here

You can simply impress
your audience and add a
unique zing.

Your Text Here

You can simply impress
your audience and add a
unique zing.
 Infographic Style
Insert the title of your subtitle Here

Your Text Here

Your Text Your Text Your Text Your Text
Get a modern PowerPoint You can simply You can simply You can simply You can simply
Presentation that is impress your impress your impress your impress your
beautifully designed. audience and audience and audience and audience and
Easy to change colors, add a unique add a unique add a unique add a unique
photos and Text. zing. zing. zing. zing.
Easy to change colors,
photos and Text. Get a
modern PowerPoint
Presentation that is
beautifully designed.
Easy to change colors,
photos and Text.
 Worldmap Style
Insert the title of your subtitle Here

Your Text Here Your Text Here Your Text Here

You can simply impress your You can simply impress your You can simply impress your
audience and add a unique zing. audience and add a unique zing. audience and add a unique zing.
50% 40% 70%
Portfolio
Presentation
Designed
Get a modern PowerPoint
Presentation that is
beautifully designed. Easy
to change colors, photos
and Text. You can simply
impress your audience and
add a unique zing and
appeal to your
Presentations. Get a
modern PowerPoint
Presentation that is
beautifully designed. Easy
to change colors, photos
and Text. Get a modern
PowerPoint Presentation
that is beautifully designed.
 Infographic Style
Insert the title of your subtitle Here

Your Text Here

Your Text Here
Easy to change colors, Get a modern PowerPoint
photos and Text. Presentation that is beautifully
designed. Easy to change
colors, photos and Text. You
can simply impress your
Text Here Text Here audience and add a unique
zing and appeal to your
Easy to Easy to
Presentations. Get a modern
change change
PowerPoint Presentation that
colors, colors,
is beautifully designed. Easy
photos and photos and
to change colors, photos and
Text. Text.
Text. Get a modern
PowerPoint Presentation that
is beautifully designed.
 Chart Style
Insert the title of your subtitle Here

Get a modern PowerPoint

You can simply Presentation that is beautifully
impress your designed. Easy to change
audience and colors, photos and Text. You
add a unique can simply impress your
zing and appeal audience and add a unique
to your zing and appeal to your
Presentations. Presentations. Get a modern
Get a modern PowerPoint Presentation that
PowerPoint is beautifully designed. Easy to
Presentation that change colors, photos and
is beautifully Text.
designed.
Get a modern PowerPoint
Presentation that is beautifully
designed. Easy to change
colors, photos and Text.
 Infographic Style
Insert the title of your subtitle Here

Text Here
You can simply impress
your audience and add
a unique zing and
appeal to your
Presentations.

Get a modern PowerPoint Presentation that is beautifully designed. Easy to change colors,
photos and Text. You can simply impress your audience and add a unique zing and appeal to
your Presentations.
 Infographic Style
Insert the title of your subtitle Here
Your Text Here Your Text Here
You can simply impress You can simply impress
your audience and add a Your Text Here Your Text Here your audience and add a
unique zing. Easy to change colors, Easy to change colors, unique zing.
photos and Text. photos and Text.

Your 01 03 Your
Text Text
02
Here Here
04
Your Text Here Your Text Here
Easy to change colors, Easy to change colors,
Your Text Here Your Text Here
photos and Text. photos and Text.
You can simply impress You can simply impress
your audience and add a your audience and add a
unique zing. unique zing.
Portfolio Simple Portfolio
Presentation Designed
Text Here
Designed Easy to change
colors, photos
Get a modern PowerPoint and Text.
Presentation that is beautifully
designed. Easy to change
colors, photos and Text. You
can simply impress your
audience and add a unique
zing and appeal to your Text Here
Presentations. Get a modern Easy to change
PowerPoint Presentation that colors, photos
is beautifully designed. Easy and Text.
to change colors, photos and
Text. Get a modern
PowerPoint Presentation that
is beautifully designed.
 Chart Style
Insert the title of your subtitle Here

Your Text Here

20% You can simply impress your audience
and add a unique zing

Your Text Here

30%
You can simply impress your audience
and add a unique zing

50% Your Text Here

You can simply impress your audience
and add a unique

Your Text Here

60% You can simply impress your audience
and add a unique zing
Portfolio Designed
Get a modern PowerPoint Presentation that is beautifully
designed. Easy to change colors, photos and Text. You can
simply impress your audience and add a unique zing.

Get a modern PowerPoint Presentation

that is beautifully designed. Easy to
change colors, photos and Text. You can
simply impress your audience and add a
unique zing and appeal to your
Presentations. Get a modern PowerPoint
Presentation that is beautifully designed.
Easy to change colors, photos and Text.
Get a modern PowerPoint Presentation
that is beautifully designed.
 Chart Style
Insert the title of your subtitle Here

Your Text Here

You can simply
impress your
audience and add a
unique zing.

Your Text Here

You can simply
impress your
audience and add a
unique zing.

Get a modern PowerPoint Presentation that is beautifully designed. Easy to change colors,
photos and Text. You can simply impress your audience and add a unique zing and appeal to
your Presentations.
Portfolio Designed
Get a modern PowerPoint Presentation that is
beautifully designed. Easy to change colors,
photos and Text. You can simply impress your
audience and add a unique zing.
Columns Style One Columns
Agenda Style
Your Texts Here
You can simply impress your audience and add a unique zing and appeal to your Presentations.
Easy to change colors, photos and Text. Get a modern PowerPoint Presentation that is
beautifully designed. You can simply impress your audience and add a unique zing and appeal
to your Presentations. You can simply impress your audience and add a unique zing and appeal
to your Presentations. Easy to change colors, photos and Text. Get a modern PowerPoint
Presentation that is beautifully designed. You can simply impress your audience and add a
unique zing and appeal to your Presentations. Easy to change colors, photos and Text. You can
simply impress your audience and add a unique zing and appeal to your Presentations. You can
simply impress your audience and add a unique zing and appeal to your Presentations. Easy to
change colors, photos and Text. You can simply impress your audience and add a unique zing
and appeal to your Presentations.

Get a modern PowerPoint Presentation that is beautifully designed. You can simply impress
your audience and add a unique zing and appeal to your Presentations.

Easy to change colors, photos and Text.

You can simply impress your audience and add a unique zing and appeal to your Presentations.
Columns Style Two Columns
Agenda Style Two Columns
Your Texts Here Your Texts Here
You can simply impress your audience You can simply impress your audience
and add a unique zing and appeal to your and add a unique zing and appeal to your
Presentations. Easy to change colors, Presentations. Easy to change colors,
photos and Text. Get a modern photos and Text. Get a modern
PowerPoint Presentation that is PowerPoint Presentation that is
beautifully designed. You can simply beautifully designed. You can simply
impress your audience and add a unique impress your audience and add a unique
zing and appeal to your Presentations. zing and appeal to your Presentations.
You can simply impress your audience You can simply impress your audience
and add a unique zing and appeal to your and add a unique zing and appeal to your
Presentations. Easy to change colors, Presentations. Easy to change colors,
photos and Text. photos and Text.

Get a modern PowerPoint Presentation Get a modern PowerPoint Presentation

that is beautifully designed. that is beautifully designed.

Easy to change colors, photos and Text. Easy to change colors, photos and Text.
 Thank you
Insert the title of your subtitle Here
 Fully Editable Icon Sets : A

You can Resize without

losing quality

You can Change Fill Color &

Line Color

FREE
PPT
TEMPLATES
www.allppt.com
 Fully Editable Icon Sets : B

You can Resize without

losing quality

You can Change Fill Color &

Line Color

FREE
PPT
TEMPLATES
www.allppt.com
 Fully Editable Icon Sets : C

You can Resize without

losing quality

You can Change Fill Color &

Line Color

FREE
PPT
TEMPLATES
www.allppt.com