This document discusses wireless technology and WiMAX. It begins with an introduction to wireless technology and its characteristics like mobility, reachability, maintainability and simplicity. It then discusses different wireless network topologies and technologies classified by range, including WWAN, WPAN, WLAN and WMAN. The document introduces WiMAX as a wireless broadband technology based on the IEEE 802.16 standard that supports broadband speeds up to 75 Mbps within a range of up to 50 km. It compares WiMAX to other wireless technologies and discusses WiMAX's vision of providing broadband everywhere as well as its benefits like replacing copper wire networks and providing high-speed connectivity.

1. Technical Seminar
LAKIREDDY BALI REDDY
COLLEGE OF ENGINEERING
(AUTONOMOUS)
By
Yaswanth G
(12761A0412)
ECE Dept.

2. Wireless Technology

3. Outline
What is Wireless
Characteristics of Wireless Communications
Wireless Technologies
Wireless Broadband Access (WBA)
What is WiMAX
WiMax Speed and Range
Why WiMax ?
Comparisons
WiMAX Vison & Advantages
Conclusion

4. What is wireless ?
 Wireless means transmitting signals using radio
waves as the medium instead of wires
 Wireless technologies are used for tasks as
simple as switching off the television or as
complex
 Now wireless keyboards, PDAs, Lap’s and
cellular phones have become part of our
daily life.

5. Characteristics of Wireless Communications
 Mobility:
wireless
communications system
allows users to access
information beyond
their desk and conduct
business from anywhere
without having a wire
connectivity

6.  Reachability:
Wireless communications
systems enable people to
be better connected and
reachable without any
limitation of any location
 Maintainability:
Being a wireless system, you do no need to spend
too much to maintain a wireless network setup.

7.  Simplicity:
Wireless communication
system are easy and fast to
move in comparison of
cabled network. Initial setup
cost could be a bit high but
other advantages
overcome that high cost.
 New Services:
Wireless communications systems provide new
smart services like SMS and MMS.

8. Wireless Network Topologies
Point-to-point bridge:
As you know a bridge is used to connect
two networks. A point-to-point bridge
interconnects two buildings having different
networks

9.  Point-to-multipoint bridge
This topology is used to connect three or
more LANs that may be located on different
floors in a building or across buildings.

10.  Mesh or ad hoc network
This network is an independent local area
network that is not connected to a wired
infrastructure and in which all stations are
connected directly to one another

11. Wireless Technologies:
Wireless technologies can be classified in
different ways depending on their range. Each
wireless technology is designed to serve a
specific usage segment.
o WIRELESS WIDE AREA NETWORK (WWAN)
o WIRELESS PERSONAL AREA NETWORK (WPAN)
o WIRELESS LOCAL AREA NETWORK (WLAN)
o WIRELESS METROPOLITAN AREA NETWORK
(WMAN)

12.  WIRELESS WIDE AREA NETWORK (WWAN):
This network enables you to access the Internet
via a wireless wide area network (WWAN)
access card and a PDA(personal digital asst.)
or laptop.
Cellular and mobile networks based on CDMA
and GSM are good examples of WWAN.

13.  WIRELESS PERSONAL AREA NETWORK (WPAN)
These networks are very similar to WWAN
except their range is very limited

14.  WIRELESS LOCAL AREA NETWORK (WLAN)
This network enables you to access the
Internet in localized hotspots via a wireless
local area network (WLAN) access card
and a PDA or laptop.

15.  WIRELESS METROPOLITAN AREA NETWORK (WMAN)
This network enables you to access the
Internet and multimedia streaming
services via a wireless region area network
(WRAN).

16. Issues with Wireless Networks:
There are following three major issues with
Wireless Networks
• Quality of Service (QoS)
• Security Risk
• Reachable Range

17. Wireless Broadband Access (WBA):
 Broadband wireless is a technology that promises
high-speed connection over the air.
 It uses radio waves to transmit and receive data
directly to and from the potential users whenever
they want it.
• Technologies such as 3G, Wi-Fi, WiMAX and
UWB(ultra wide band) work together to meet unique
customer needs.
• BWA(Broadband Wireless Access) offers an
effective, complementary solution to wireline
broadband, which has become globally recognized
by a high percentage of the population.

18. What is ?
 WiMax (Worldwide Interoperability for
Microwave Access) is a wireless
broadband technology, which supports
point to multi-point (PMP) broadband
wireless access
 Based on Wireless MAN technology.
 WiMax is basically term for Standard
IEEE 802.16

19. Introduction to IEEE 802.16 Series
Series Technical Field
802.16 10-66 GHz, fixed broadband wireless
access system air standard
802.16a 2-11 GHz fixed broadband wireless
access system air standard
802.16c Supplementary provisions about the
compatibility of 10-66 GHz fixed
broadband wireless access system
802.16d 2-11 GHz fixed wireless access system air
standard
802.16e 2-11 GHz fixed and mobile broadband
wireless access system air standard
802.16f Fixed broadband wireless access system
in air interface
802.16g Fixed and mobile broadband wireless
access system air interface

20. WiMax Speed and Range:
o The IEEE wireless(WIMAX) standard has a
range of up to 50 kilometers
o Wimax Can deliver broadband at around
75 megabits per second (75 mbps)
o Wimax can approved in January 2003, to
provide operations in the <11GHz
spectrum range ie., 2.3GHz, 2.5GHz,
3.5GHz, and 5.8GHz

21. Why WiMax ?

22. Development of Wireless Communication

23. Comparisons
Parameters
WIMAX
(IEEE802.16)
Mobile WiMAX
(IEEE802.16e)
WLAN
(IEEE802.11
)
Bluetooth
(802.15.1)
Frequency
Band:
2-66GHz
2 - 11GHz
2.4 –
5.8GHz
2.4GHz
Range ~31 miles
~31 miles
~100 meters
~10meters
Maximum
Data rate:
~134 Mbps
~15 Mbps
~55 Mbps
~3Mbps
Number of
users:
Thousands
Thousands
Dozens
Dozens

24. WiMAX Vision: Broadband Everywhere

25. WiMAX - Major Benefits
o This technology offers a high speed, secure,
sophisticate, last mile broadband service,
and cheap solution to certain rural access
zones.
o In a fixed wireless communication, WiMAX
can replace the telephone company's
copper wire networks, the cable TV's coaxial
cable infrastructure.

26. Conclusion
WiMAX fills the gap between Wi-Fi and Cellular,
thus providing vehicular mobility, and high
service areas and data rates WiMAX
developments have been rapidly moving
forward