WiMAX technology allows for wireless broadband connectivity over long distances in a more economical way than other wireless technologies. It works by using towers to transmit high-speed network signals up to 30 miles to both fixed and mobile receivers. Key benefits include serving many users at once from a single tower, faster deployment than wired networks, large coverage areas, standardization allowing interoperability between equipment, and providing high-speed broadband access at lower costs than other options. However, it also has drawbacks like needing line-of-sight for long-distance connections, susceptibility to weather interference, and high installation costs for equipment.

1. NATIONAL INSTITUTE OF TECHNOLOGY
ARUNACHAL PRADESH
WiMAX TECHNOLOGY
Presented by
SHUBHAM ANAND
(ECE/14/05)
Dept. of Electronics & Comm. Engineering
1

2. Contents :
Introduction :
What is WiMAX ? What is IEEE 802.16 ?
Features
Working
Application
Comparisons
Benefits
Drawbacks
Comparisons
Conclusion and Future Works
References
2

3. What is WiMAX ?
Acronym for World Wide Interoperability for Microwave
Access.
It is a wireless MAN technology based on the standards of
IEEE 802.16.
WiMAX is designed to provide wireless broadband connectivity
in more economical way.
It is similar to Wi-Fi but has greater reachability.
3

4. What is IEEE 802.16 ?
IEEE 802.16 is a series of wireless broadband standards written
by Institute of Electrical and Electronics Engineers.
It specifies the frequency band, security measures, the
modulation scheme, data classification, the error correction
techniques, synchronization between receiver and transmitter ,
data rate , multiplexing technique, power saving mechanism etc.
WiMAX forum certifies the products which satisfy the IEEE
802.16 standards. Therefore, WiMAX forum certified
equipments from different manufacturers are interoperable with
each other.
4

5. Features of WiMAX
Flexible and Dynamic per User Resource Allocation:
Both uplink and downlink resource allocation are controlled by a
scheduler in the base station. Capacity is shared among multiple
users on a demand basis.
Flexible channel bandwidth:
WiMAX has flexible channel bandwidths between 1.5 and 20
MHz to facilitate transmission over longer ranges.
Advanced IP-based architecture:
The WiMAX Forum has defined a reference network architecture
that is based on an all-IP platform. All end-to-end services are
delivered over an IP architecture relying on IP-based protocols
for end-to-end transport, security, and mobility.
5

6. Working of WIMAX
WIMAX tower: It is
similar in concept to a cell
phone tower.A single tower
may provide coverage upto
30 miles.
WIMAX receiver: It may
be a small antenna or could
be built into laptop and other
wimax devices.
WIMAX system consists of :
6

7. Line of sight (LOS):A fixed antenna points straight to the
wimax tower from a rooftop or a pole.LOS
connection is more stable and able to send a lot of data with high
speed. It uses high frequency upto 66 GHz.
Non line of sight(NLOS):This mode is just like wifi connectivity.
It uses lower range of frequency from 2 GHz to 11GHz. Signal
from a wireless transmitter passes several obstructions before
arriving at a wireless receiver. The signal may be reflected,
refracted, diffracted, absorbed or scattered. These create multiple
signals that will arrive at a receiver at different times, from
different paths, and with different strength.
Modes of transmission
7

8. How it works?
8

9. Operational :WiMAX
9

10. Applications of WiMAX:
Broad band internet access:
This is one of the major applications. It provides high speed
broadband access over wide range at low cost. It is 1000 times
cheaper than 3G network.
Wi-Fi hotspots:
We can connect our routers with WiMAX and create wifi
hotspot to get internet access for multiple devices.
Telecommunication (VoIP) services:
This is voice call sort of service. VoIP, is a method for taking
analog audio signals, and turning them into digital data that
can be transmitted over the Internet. VoIP can turn a standard
Internet connection into a way to place free phone calls.
10

11. Benefits of WiMAX:
Single base station can serve hundreds of users:
Having large frequency band and adjustable channel width in
nlos region, WiMAX can bring internet access to large no. of
users at a time.
Much faster deployment process than wired network:
Wired infrastructures needed more time for establishment as
compared to wireless.
Large coverage area:
This is benefit over wifi. We get almost similar speed over wide
range.
It is standardized:
This leads the equipments towards interoperability. Enough products
are available in the market to choose from.
11

12. Drawbacks of WiMAX:
LOS is needed for longer connection:
This is why we need very large towers to transmit signals to long
distances.
Weather condition could interrupt the signal:
Quality of service is a big challenge for wireless communication.
As information is carried over microwaves, so atmospheric
Conditions have huge impact on transmission.
Big installation cost:
Equipments are costly. So, huge investment is required.
Huge power consumption:
It takes huge power to run the system. Power is required to send the
Signals over long distances.
12

13. Comparison with Wifi:
WiMAX Wifi
Type of network MAN LAN
Frequency band Licensed/Unlicensed
2-11 GHz in nlos,
10-60 GHz in los
Unlicensed
2.4 GHz
Channel bandwidth Adjustable
1.25-20 MHz
25 MHz
Bandwidth efficiency <=5 bps/Hz <=0.44 bps/Hz
Maximum speed 100 mbps 54 mbps
Range 8 Km in nlos,
48 Km in los
100 m
13

14. Future scope and conclusion:
WiMAX is considered as an alternative to cellular broadband
services.
Although it is not deployed on large scale, it is useful to connect
remote areas.
The technology would give rise to existing consumer market for
Wireless digital devices.
So far it has captured the market of Korea and some of the
developing countries where people are getting connected to the
internet for the first time.
14

15. References:
https://fasufi.wordpress.com
http://freewimaxinfo.com
https://en.wikipedia.org
http://www.tutorialspoint.com
http://thefutureofthings.com
http://www.wired.com/2010/09/wireless-explainer/
https://books.google.ca
http://www.agir.ro/buletine/687.pdf
15

16. Thank You !!