WiMAX is a wireless technology that provides broadband connections over long distances. It uses radio waves in the 2-11 GHz range to transmit data, allowing it to provide coverage over large areas of up to 50 km from the base station. WiMAX was developed to provide wireless internet access similar to cable or DSL but over longer distances and in more rural areas. It allows for speeds of up to 70 Mbps and can support both fixed and mobile broadband applications. While WiFi is better suited for short range indoor use due to its lower power and speeds of up to 54 Mbps.

1. Wimax
&
Comparison
With
Wifi
M.Kanimozhi
III MCA
29713

2. •Why WiMAX?
•What is WiMAX?
•History of WiMAX
•How WiMAX
works?

3. Think about how you access
the
Z
Internet today??????

4. There are basically three different
options
Broadband access
Wi-Fi access
Dial-up access

5. Need for new Technology...
The high speed of broadband service.
Wireless rather than wired access .
It would be a lot less expensive than cable or DSL
 Much easier to extend to suburban and rural
areas
Broad coverage like the cell phone network
instead of small WiFi hotspots

6. A system to provide all these features
is known as WiMAX

7. WIMAX
 Worldwide Interoperability for Microwave
Access
 It is of the standard IEEE 802.16.
 WiMAX could replace cable and DSL services,
providing universal Internet access just
about anywhere you go.

8. History Of WiMAX
1999
 The Institute of Electrical and Electronics Engineers (IEEE)
devised the 802.16 standard
2001
Operated on a point-to-point radio link network by means of
line of sight transmissions, had a frequency range of
10 GHz to 66 GHz
Developers focused more exclusively on the 802.16 standard
that functioned in the range of
2 GHz to 11 GHz.
The WiMAX Forum was established with the agenda to market
and promote the 802.16 standard
2003
 The IEEE came out with 802.16a, which transmitted data through
non-line of sight radio channels to and from omni-directional
antennas.

9. History Of WIMAX(contd…)
2004
The 802.16-2004 standard was released. This standard combined the
updates from the IEEE 802.16a, 802.16b, and 802.16c regulations.
2005
First Mobile WiMAX system: 802.16e.it supported over 2,000
subcarriers, optimized handover delay and packet loss, and
increased network security.
 Publish their next major 802.16 standard named 802.16m.
One of the goals for this version is to increase data speeds to
1Gbps.

10. How Wimax works?
A WiMAX tower station can connect directly to the Internet
using a high-bandwidth, wired connection (for example, a T3
line).
 It can also connect to another WiMAX tower using a line-of-
sight, microwave link.
This connection to a second tower (often referred to as
a backhaul), along with the ability of a single tower to cover up
to 3,000 square miles
It allows WiMAX to provide coverage to remote rural areas.

11. How Wimax works?

12. •WiMAX System
• Two forms of wireless
service
•WiMAX Coverage and
Speed
• WiMAX Spectrum
•WiMAX Standards
•WIMAX Equipment
•Uses of WiMAX
•Applications

13. A WiMAX System
It consists of two parts:
A WiMAX tower
A WiMAX receiver

14. A WiMAX tower
It is similar in concept to a cell-phone tower .
A single WiMAX tower can provide
coverage to a very large area –
as big as 3,000 square miles
(~8,000 square km).

15. A WiMAX receiver
The receiver and antenna could be a
small box or PCMCIA card,
or they could be built into a laptop the way
WiFi access is today.

16. Two forms of wireless
service
Non-line-of-sight
line-of-sight

17. Non-line-of-sight
 WiFi sort of service
 A small antenna on your computer
connects to the tower.
 WiMAX uses a lower frequency range --
2 GHz to 11 GHz (similar to WiFi).

18. Line-of-sight
 A fixed dish antenna points straight at the WiMAX
tower from a rooftop or pole.
 The line-of-sight connection is stronger and more
stable, so it's able to send a lot of data with fewer
errors
It use higher frequencies, with ranges reaching a
possible 66 GHz.
 At higher frequencies, there is less interference
and lots more bandwidth.

19. Coverage and speed
WiMAX should be able to handle up to 70 megabits
per second.
WiMAX will blanket a radius of 30 miles (50 km)
with wireless access.
The increased range is due to the frequencies
used and the power of the transmitter.

20. IEEE 802.16 Specifications
Range - 30-mile (50-km) radius from base station
Speed - 70 megabits per second
Line-of-sight not needed between user and base station
Frequency bands - 2 to 11 GHz and 10 to 66 GHz (licensed
and unlicensed bands)

21. WiMax Spectrum
 Unlicensed 5 GHz : The bands between
5.25 and 5.85 GHz.
 Licensed 3.5 GHz:The Bands between
3.4 and 3.6 GHz
 Licensed 2.5 GHz: The bands between
2.5 and 2.6 GHz

22. WiMax Standards
802.16 802.16a 802.16-
2004
Date December 2001 January 2003 June 2004
Completed
Spectrum 10-66 GHz < 11 GHz < 11 GHz
Operation LOS Non-LOS Non-LOS
Bit Rate 32-134 Mbps Up to 75 Mbps Up to 75 Mbps
Cell Radius 1-3 miles 3-5 miles 3-5 miles

23. WiMAX Technology at
Home
An Internet service provider sets up a WIMAX base station 10 miles
from your home.
You would buy a WiMAX-enabled computer or upgrade your old
computer to add WiMAX capability.
 You would receive a special encryption code that would give you
access to the base station.
 The base station would beam data from the Internet to your
computer (at speeds potentially higher than today's cable modems),
for which you would pay the provider a monthly fee.
The cost for this service could be much lower than current high-
speed Internet-subscription fees because the provider never had to
run cables.

24. Types of Wireless access
Fixed wireless access (FWA)
Mobile wireless access (MWA)
Nomadic wireless access (NWA)

25. Fixed wireless access
(FWA)
Wireless access application in which the
location of the end-user termination and
the network access point to be connected
to the end-user are fixed.

26. Mobile wireless access
(MWA)
Wireless access application in which the
location of the end-user termination is
mobile.

27. Nomadic wireless access
(NWA)
Wireless access application in which the
location of the end-user termination may
be in different places but it must be
stationary while in use.

28. WiMAX Technology
.
For fixed and portable access applications
• Up to 40 Mbps per channel, in a cell radius of 3 ~ 10 km
For mobile network deployments
• Up to 15 Mbps per channel, in a cell radius up to 3 km

29. WIMAX Equipments
There are numerous devices on the market that provide connectivity
to a WiMAX network. These are known as the "subscriber unit" (SU).
Some connecting devices:
Gateways
Dongles
Mobile Phones

30. Gateways
•WiMAX gateway devices are available as both indoor and
outdoor versions from several manufacturers.
Indoor gateways
Outdoor gateways

31. Gateways
Indoor gateways are convenient, but radio losses mean that the
subscriber may need to be significantly closer to the WiMAX base
station than with professionally-installed external units.
Outdoor gateways are roughly the size of a laptop PC, and their
installation is comparable to the installation of a residential satellite
dish.

32. Dongles
It provides connectivity to a WiMAX network.
Dongles typically have omnidirectional antennae which are of
lower-gain compared to other devices, as such these devices are
best used in areas of good coverage.
The Bluetooth USB Dongle is an external adapter that can be
connected to the USB port of any notebook or desktop PC

33. Mobile Phone
HTC announced the first WiMAX enabled mobile
phone, the Max 4G, on November 12, 2008.
The device was only available to certain markets
in Russia on the Yota network.

34. Interesting Points
 Simultaneously support hundreds of businesses with
T-1 speed connectivity and thousands of homes with
DSL speed connectivity.
 Promise of potential low cost and flexibility in building
broadband networks.
Support for both voice and video as well as Internet
data.

35. Uses of WI-MAX
The bandwidth and range of WiMAX make it suitable for the
following potential applications
Providing portable mobile broadband connectivity across cities
and countries through a variety of devices.
Providing a wireless alternative to cable and DSL for "last mile "
broadband access
Providing data, telecommunications (VoIP) and IPTV services
(triple play).

36. WiMax Applications:
According to WiMax Forum it supports 5 classes of
applications:
Multi-player Interactive Gaming.
VOIP and Video Conference
Streaming Media
Web Browsing and Instant Messaging
Media Content Downloads

37. WiMAX and wiFi

38. IEEE Standards
Wi-Fi is based on IEEE 802.11
standard
WiMAX is based on IEEE 802.16
standard

39. Coverage and speed
WiFi-style access will be limited to a 4-to-6 mile radius
WiMAX access will be within 30 mile radius(due to stronger
line-of-sight antennas)
The fastest WiFi connection can transmit up to 54 megabits
per second
 WiMAX can transmit up to 70 megabits per second.
The biggest difference isn't speed; it's distance

40. Data Transfer
Wimax offer high speed internet as a broadband access
which transfer data, voice, video at very high speed.
WiFi offer short range of data transfer because WiFi can
connect only in specified areas so only file sharing may
possible.

41. Cost
Wimax is a high cost network.
Wifi is a low cost network
therefore mostly people adopt WiFi network due to less
expenditure and avoid Wimax due to expensive installations.

42. Quality of Service
Wi-Fi does not guarantee any QoS
WiMax will provide your several level of QoS.

43. conclusion
Provide high-speed Internet access to home and business
subscribers, without wires.
Use wireless links with microwave
standard based technology enabling the delivery of last mile
wireless broadband access as an alternative to cable and
DSL

44. References…
• www.howstuffworks.com
• www.ask.com

45. Thank You!!!!