Definition:WiMAX is a fourth generation (4G) technology.WiMAX stands for Worldwide Interoperability for Microwave Access.WiMAX is technically also known as “IEEE 802.16”WiMAX is a wireless communications standard designed for creating Metropolitan Area Networks(MANs).A Broadband Wireless Access(BWA) technique offering fast broadband connection.It allows a user, to browse the internet on a laptop without physically connecting it to a router.It involves microwaves for the transfer of data wirelessly.Founded by Ensemble, CrossSpan, Harris & Nokia.

1. WiMAX
Made By-
Jarin Tasnim Khan
Department Of CSE
27th Batch
Ahsanullah University of Science & Technology
Dhaka,Bangladesh.

2. Contents
• What is Wimax?
• WiMAX Specification
• Architecture
• A WiMAX system consists of
• Modes Of Operation
• How WiMAX works
• WiMAX offer fixed and mobile access
• Connectivity
• Features of WiMAX
• WiMAX Forum
• Applications
• Uses of WiMAX
• Advantages and disadvantages
• WiMAX vs WiFi
• Wimax over 3G
• Competing Technology
• Present Research

3. What is WiMAX?
• A fourth generation (4G) technology.
• WiMAX stands for Worldwide Interoperability for Microwave Access.
• WiMAX is technically also known as “IEEE 802.16”
• WiMAX is a wireless communications standard designed for creating Metropolitan
Area Networks(MANs).
• A Broadband Wireless Access(BWA) technique offering fast broadband connection.
• It allows a user, to browse the internet on a laptop without physically connecting it
to a router.
• It involves microwaves for the transfer of data wirelessly.
• Founded by Ensemble, CrossSpan, Harris & Nokia

4. WiMAX SPECIFICATION
• 802.16a
-Uses the licensed frequencies from 2 to 11 GHz
-Supports Mesh network
• 802.16b
-Increase spectrum to 5 and 6 GHz
-Provides QoS( for real time voice and video service)
• 802.16c
-Represents a 10 to 66GHz
• 802.16e
-Addresses on Mobile
-Enable high-speed signal handoffs necessary for
communications with users moving at vehicular speeds

5. Architecture
IEEE 802.16 Protocol Architecture has 4 layers: Convergence, MAC,
Transmission and physical, which can be mapped to two OSI lowest
layers: physical and data link

6. A WiMAX system consists of
1) A WiMAX tower, 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).
2) A WiMAX receiver - The receiver and antenna
could be a small box or Personal Computer
Memory card, or they could be built into a laptop
the way WiFi access is today

7. MODES OF OPERATION
LINE OF SIGHT
• Uses a lower frequency range.

8. MODES OF OPERATION
NON LINE Of SIGHT
• Uses a higher frequency range

9. How It Works?
• A WiMAX tower station can connect directly to the internet
using a high-bandwidth, wired connection.
• It can also connect to another WiMAX tower using a line-of-
sight, microwave link.
• This connection to a second tower, along with the ability of a
single tower to cover up to 3,000 square miles, is what allows
WiMAX to provide coverage to remote rural areas.

10. WiMAX is well suited to offer both fixed and mobile access

11. Connectivity
• Devices that provide connectivity to a WiMAX network
are known as the “subscriber stations”.
Some of the portable units are:
• Mobile Phones
• PC peripherals
• Laptops
• Gaming consoles
• MP3 Players

12. FEATURES OF WIMAX
• Frequency bands - 2 to 11 GHz and 10 to 66 GHz
(licensed and unlicensed bands)
• Range – 30 mile (50-km) radius from base station
• Speed - 70 megabits per second
• Coverage-A single tower covers upto 3000 sq.miles so
remote areas can easily get broadband access

13. The WiMAX Forum
• The WiMAX Forum is a non
profit organization formed to
promote the adoption of
WiMAX compatible products
and services.
• A major role for the
organization is to certify the
interoperability of WiMAX
products.
• Another role of the WiMAX
Forum is to promote the
spread of knowledge about
WiMAX.

14. Applications
• According to WiMAX forum, it supports five classes
of applications:
 Multi-player Interactive Gaming.
 VOIP and Video Conference
 Streaming Media
 Web Browsing and Instant Messaging
 Media Content Downloads

15. USES OF WiMAX
• Connecting Wi-Fi hotspots to the Internet.
• Providing a wireless alternative to cable and DSL for "last mile" broadband
access.
• Providing data and telecommunications services.
• Providing a source of Internet connectivity as part of a business continuity
plan.
• Providing portable connectivity.
• Providing hassle free ,reliable & hi-speed broadband access.

16. Advantages of WiMAX
• Large coverage
• High speed
• Multi functionality
• Infrastructure
• Smart antenna and mesh topology
• Ultra wide band

17. Disadvantages of WiMAX
• Expensive network
• Depends on weather condition
• Power consuming
• Data rate is slow as compared to fiber optics, satellite
and cables
• Mobility suffers when large sized long range antenna are
used.
• Efficiency can be hampered by conditions and increase
of connected user if signal strength is not boosted.
• Allocation of bandwidth issues.

18. WiMAX Vs Wi-Fi
• WiMAX coverage is
about 30 miles.
• It provides
metropolitan area
network(MAN).
• WiMAX network
provides Quality of
Service(QoS).
• It is a high cost
network.
• It offers high speed of
broadband access
•Wifi coverage is limited
to 1.5 miles
•It provides Local area
network.
•Wifi needs effort to
stay connected with a
specified access point.
•It is a low cost
network.
•It offers short range of
data transfer.

19. Advantages of WiMAX over 3G
• WiMAX is important for mobile broadband wireless, as it
completes 3G by providing higher performance for data
with more than 1 Mbps downstream to allow connection of
laptops and PDAs.
• WiMAX has a clear advantage over 3G as it uses OFDM
technique.
• WiMAX spectrum is more economical than 3G.

20. Competing Technology

21. Present research work on WiMAX
• WiMAX2 is the present ongoing development in the WiMAX
versions.
• That is to increase the speed of existing WiMAX network.
• Currently existing WiMAX versions provides minimum of 30 to
40 megabits per second of speed.
• But the goal of the WiMAX2 is to get 100 Mbit/s for mobile
devices and 1 Giga bits per second fixed type of WiMAX
devices and 4G for next generation mobile network.

22. Any Question?