This presentation is made by Paras & Amandeep- students of World Class Skill Centre, Dwarka pursuing one year full time certificate course in Computer System Operator.

1. PRESENTATION ON:
WIRELESS
TELECOMMUNICATIONS
AND NETWORKS
MADE BY:- PARAS & AMANDEEP

2. DEFINITION:
 A Network is a collection of computers, server,
mainframes, network devices, peripherals, or other
devices connected to one another to allow the sharing of
data.
 An excellent example of a network is the ‘INTERNET’,
which connects millions of people all over the world.

3. WIRELESS COMMUNICATIONS:
 A Telecommunication system is a collection of
interconnected equipments.
 Uses radio waves to communicate.
 Objective is to exchange data or information among
devices.
 Used for past few decades with examples like T.V.
remote control.

4. MAJOR USES OF NETWORK:
 File Sharing
 Printers
 Sharing Storage Media
 Video Games

5. ADVANTAGES OF WIRELESS
COMMUNICATION SYSTEM:
 Can be Configured without use of Physical Cable to
connect computers & other networked devices.
 Easy to install in next place by reallocating wireless
devices in new place.
 Helps connecting to internet more conveniently.
 Can be set-up on DEMAND.

6. Different Generations of ‘WIRELESS
COMMUNICATION SYSTEM’:
DIFFERENT
GENERATION
S OF
WIRELESS
COMMUNICA
TION
SYSTEM
1G
2G
3G4G
5G

7. First Generation or “1G”:
 Designed during 1980s.
 Based on ANALOGY SIGNAL TRANSMISSION.
 Capable of communicating among devices with similar
technologies.
 EXAMPLE :-
 Advanced Mobile Phone System (AMPS) in U.S.A.
 Total Access Communications System (TACS) in U.K.

8. Features (1G)
Narrow band
analogue
communication
system.
Facilitates voice
calls & text
messages.
Connection
oriented &
circuit switching
method used to
exchange
information.

9. Easier to
establish &
understand.
Cost
involved is
less.
Advantages (1G)

10. Disadvanta
ges (1G)
High power
consumption,
equipments
need large
batteries.
Not capable
of providing
multimedia
services.
Can only be
used for
transmitting
voice & not
data.

11. SECOND GENERATION OR “2G”:
 Started in 1990.
 Based on Digital technology.
 Allows full international roaming, common encryption.
 EXAMPLES:-
 GSM (Global System for Mobile)

12. Featur
es (2G)
Uses low
powered radio
signals, phones
consume less
power.
Produces lower
noise in
communication.
Supports SMS &
E-mail.
Enhanced
privacy,
providing
security
algorithm on
device.

13. Establishment
of digital
transition,
introduction to
SMS and Email.
Increased
security by
greatly
reducing SIM
forgery.
Lower power
emission, help
reducing health
problems.
Advantag
es (2G)

14. Disadvanta
ges (2G)
Weaker digital
signal, not
sufficient
enough to reach
a cell tower.
Less tonality of
someone’s
voice talking on
a digital
cellphone.
Reduced range
of sound.

15. Third GENERATION OR “3G”:
 Allows significant increase in speed of data services.
 Made compatible to access internet.
 Can be used for :
 Email services
 Downloading music & videos from internet

16. Featur
es (3G)
Facilitated
global roaming.
Supports
services like
weather or
traffic
conditions
through mobile.
Supports video
conferencing.
Location
information of
3G devices
supports apps
which were not
available before.

17. Suitable for
high data
transmission
at a faster rate.
Supports apps
like video
conferencing,
motion video,
fast internet
access, etc.
Improved
spectral
efficiency,
greater network
capacity.
Advantag
es (3G)

18. Disadvanta
ges (3G)
Limited
mobility, less
than 10 miles
per hour.
Cost of
upgrading to
3G is high.
High power
consumption,
requires large
batteries.

19. fourth GENERATION OR “4G”:
 Provides a communication technology based on internet
protocol.
 Supposed to facilitate a Gigabit speed i.e. 100+ Mega
Bytes per second.
 Based on packet switched communication with wide
coverage.
 Enables internet access, IP telephony, gaming services.

20. Feature
s (4G)
Inbuilt
multimedia
support.
Television
connectivity.
Faster data
transmission
rate than all
previous
generations.
 LTE:-
is a kind of 4G that provides
fastest connection to the
mobile internet experience- 10
times faster than 3G.

21. Extremely
high voice
quality.
Higher
bandwidth.
Quickly
download
files over
wireless
network.
Advantages
(4G)
 BANDWIDTH:-
A range of
frequencies within a
given band,
particularly used for
transmitting a signal.

22. Disadvanta
ges (4G)
Higher data
prices for
consumers.
Consumer is
forced to buy a
new device to
support 4G.
Difficult to
make current
equipment
compatible with
4G network.

23. fIFTH GENERATION OR “5G”:
 It will take a much larger role than previous
generations.
 It will elevate the mobile network to inter-connect
& control machines, objects & devices.
 It will deliver new levels of performance and
efficiency.

24. Feature
s (5G)
Latency of only
one
millisecond.
Reduces
energy
consumption
in the network
upto 90%.
It will have
high-speed,
depending on
device, upto 10
GB per second.
99% network
availability.
 LATENCY:-
Latency is the total time
taken by a data packet to
travel from origin to it’s
destination.

25. Greater speed
(enough to
download a
movie in few
seconds).
Greater
capacity (1000
times capacity
of 4G).
Lower battery
consumption.
Advantages
(5G)

26. Disadvanta
ges (5G)
Technology is
still under
process.
Developing
infrastructure
needs high
costs.
Security &
Privacy issues
yet to be
solved.

27. CONCLUSION:
o 1G:- Delivered Analog Voice.
o 2G:- Introduced Digital Voice (e.g., CDMA)
o 3G:- Brought Mobile Data (e.g., CDMA2000)
o 4G:- LTE ushered in the era of mobile internet.
o 5G:- One millisecond Latency.