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Types of Wireless Networks

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Shais Haq

on 18 January 2015

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Transcript of Types of Wireless Networks

Shais ul Haq BSTS-12-11
Abdur Rehman BSTS-12-17
Umair Ashraf BSTS-12-23
Maaz ul Hassan BSTS-12-20
Abdul Rasheed BSTS-12-43
M. Kashif BSTS-12-07

WIRELESS NETWORK
Data are carried by
electrical waves
(e.g. radio wave) from one node to another.
No Physical Cable/Wire
The backbone network usually uses cables.
Types
Wireless PAN
Wireless LAN
Wireless MAN
Wireless WAN
Wireless Mesh Network
Mobile Devices Network
Wireless Personal Area Network
Wireless personal area networks (WPANs) interconnect devices within a relatively small area, that is generally within a person's reach.
Wireless Wide Area Network
Wireless Wide Area Networks are wireless networks that typically cover
large areas
, such as between neighboring towns and
cities
, or
city
and suburb.
Most common - all
mobile phones
are connected to a wireless wide area network.
Wireless Mesh Network
A wireless mesh network is a wireless network made up of
radio waves
organized in a
mesh topology
.
Each node
forwards messages
on behalf of the other nodes.
Mesh networks can
self heal
, automatically re-routing around a node that has lost power
Types of Wireless Networks
Presented by :
Any
Questions..
Thank you..
History
The term
WiFi
, first used commercially in
August 1999
, was coined by a brand consulting firm called
Inter band Corporation
.
Vic Haves
has been called the "father of WiFi"
Wireless Network Hardwares
Antenna
Signal booster
Network interface cards (NIC)
Hubs
Switches
Modems
Wireless router
Wireless access point
Wireless adapter
Bluetooth is major technology of WPANs.
Well suited to use in small devices.
Range of 33 feet
WPAN Technology
Wireless Local Area
Network (WLAN)
A wireless local area network (WLAN) links two or more devices over a
short distance
using a wireless distribution method, usually providing a connection through an access point for
INTERNET ACCESS

Works
untethered
Improve productivity by
saving time
(use idle time, minimize meeting prep time)
Have
real-time access
for urgent messages and key information

WLAN
Function
Wireless
equivalent to Ethernet Local Area Network

Based on IEEE standard 802.11 series

802.11 – 1997, data rates to 2 Mb/s (outdated)
802.11b - 1999, data rates to 11 Mb/s (available now)
802.11g - 2000, data rates to 22 Mb/s (available 2002)
802.11a - emerging, data rates to 54 Mb/s (available late 2001)

802.11b is dominant technology being implemented.
WiFi is
best technology
of WLAN;
Range – several
100 meters
WLAN is often used in cities to connect networks in two or more buildings
without installing a wired
link.
WMN Applications

US military forces use it to connect computers in field operation.
Students use wireless mesh network to exchange files although they lack wired connection.
Wireless Metropolitan Area Network
Wireless Metropolitan Area Networks are a type of wireless network that connects
several
wireless local area networks.
WiMAX
is a type of Wireless MAN and is described by the IEEE 802.16 standard
Wireless Metropolitan Area Network is also known as
Wireless Local Loop
(WLL).
Wireless local loop can reach effective transfer speeds of
1 to 10 Mbps
within a range of
4 to 10 kilometers
, which makes it useful mainly for telecommunications companies.
Started with cell phones – many technologies & standards Progressed through multiple generations
Analog voice phones
Digital voice phones
Web-enabled phones
Despite multiple generations, technology is still immature and changing dynamically (e.g., web access from a cell phone
Evolution
Main Technologies
GSM
Global System for Mobile Communication (GSM) (GSM)
A digital mobile telephone system used in Europe and other parts of the world
GPRS
General Packet Radio Service (GPRS)
Provides continuous connection to the Internet for mobile phone and computer user
UMTS
Universal Mobile Telecommunications System (UMTS)
A broadband, packet-based system offering a
consistent set of services
to mobile computer and phone users no matter where they are located in the world
Mobile Devices Network
A cellular network or mobile network is a radio network distributed over land areas called
cells
.


With the development of smart phones , cellular telephone networks routinely carry data in
addition to telephone conversations
.

Global system of communication
Personal communication Services
Digital Advanced Mobile Phone Service
Mobile Devices Network
Global System for Mobile Communications
A
digital
mobile telephone system used in Europe and other parts of the world.
Personal communication Services
PCS is a
radio band
that can be used by mobile phones in North America and South Asia.
Sprint
happened to be the first service to set up a PCS.
Digital Advanced Mobile Phone Service
Digital Advanced Mobile Phone Service, an upgraded version of AMPS, is
being phased out
due to advancement in technology. The newer GSM networks are replacing the older system
Wireless network speed depends on

The wireless network technology
standard
The
distance
between sender and receiver, or between a node and a Wireless Access Point
Interference
from other wireless devices or electronic devices (e.g., wireless phone)
The
presence of solid object
(especially metal object, electronic appliance) between the sender and receiver, or between a node and a Wireless Access Point
Wireless network Speed And Range
To Increase
Using
signal booster

Using
Wireless Access Point
instead of using ad-hoc mode, use infrastructure mode.

Using multiple
Wireless Access Point
Wireless Network Standards
Two major wireless network technology
standards:

IEEE 802.11
Wireless Fidelity (WiFi)

IEEE 802.15
Bluetooth



WiFi..
WiFi is a popular technology that allows an electronic device to exchange data wirelessly using
Radio signals
over computer network including
internet
connection
Most popular
All Wi-Fi standards (802.11, a, b, g) have the following features:
Includes
802.11
The oldest
Maximum throughput: 2 Mbps
Maximum distance between sender and receiver (node and WAP): 150 feet

802.11 b
Maximum throughput: 11 Mbps
Maximum distance between sender and receiver (node and WAP): 300 feet


802.11 a
Developed after 802.11 b
Maximum throughput: 54 Mbps
Problem: NOT compatible with the “popular” 802.11 b
Maximum distance between sender and receiver (node and WAP): 150 feet

802.11g
Maximum throughput: 54 Mbps
Maximum distance between sender and receiver (node and WAP): 300 feet
USES
All stations share a
single
radio frequency communication channel
Transmissions on this channel are received by all stations
within range
.
The hardware
does not signal
the user that the transmission was delivered and is therefore called a best effort security mechanism
BLUETOOTH
Technology of
WPAN
Short-range
network
Its speed is
4 Mbps
RANGE
33 feet (10 meters
Why we use ?
Freedom of movement
Avoid the costly cables
In buildings
Connecting other equipments
Communication mode: supporting
Ad-hoc and Infrastructure
SSID
Wired (Cabled) Network versus Wireless Network
Mobility
: Users can roam around the network without being disconnected.
Installation speed and cost
: Building wireless medium to large network is usually faster and cheaper than building wired (cabled) medium to large network because there is
no need to pull cable through walls and ceiling
s.
Reach of network
: Wireless network can be extended to places where wire/cable cannot reach
Flexibility/scalability
: New computers can be added easily without having to pull cable into the computers

Disadvantages of Wireless Network
Speed
:
In general, wireless network technology is slower than wired network technology.

Security
:
In general, wireless network is less secured than wired network.
Abdur Rehman BSTS-12-17
M. Kashif BSTS-12-07
Abdul Rasheed BSTS-12-43
Maaz ul Hassan BSTS-12-20
Umair Ashraf BSTS-12-23
Antenna
Wireless network adapters, access points, and routers all utilize an antenna to
assist in receiving signals
on the WLAN.
Booster
Increase the
strength
of BTS
Improves transmission and reception simultaneously
NIC
Controls the
flow of data
Also known as
adapter card, network card
A
light
will indicate that and internal antenna is
activated
Hub
Distributes packets of data to connect more than two computers.
Not intelligent
Broadcast
Switch
Intelligent
Learns which machine is connected to its port of other devices IP's address
Uni cast
Reduces broadcast traffic
Modem
Modulator and Demodulator
Connects to a wireless network i
nstead of using telephone
or cable television lines
Connection to ISP
Router
Provides access to internet or other computer
Controls the speed
Security requirements
Center of your WIFI network
Wireless access point
Central wiring device
to connect wireless nodes to wireless/wired network
If a network uses WAP, all computers
must communicate
via the WAP
PC Adapter
Joins a notebook computer to the network
Width and height is of a credit card
Hardware interface standard
Full transcript