1. WiMAX
Presented By
Ch.Srinivas Koundinya
118T1A0435

2. Internet Connections Three traditional ways to connect Internet:
1)Dial-up access – It is an Internet connection that will be established by using a modem which act as data transfer medium when user initiates dial up connection.
2)Broadband access -This refers to high-speed data transmission in which a single cable(DSL cable,modem) can carry a large amount of data at once.
3)WiFi access - Wi-Fi refers to wireless networking technology that allows computers and other devices to communicate over a wireless signal.

3. IEEE 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)
Defines both the MAC and PHY layers and allows multiple PHY-layer specifications.

4. What is WiMAX ?
WiMAX is short for “Worldwide Interoperability for Microwave Access”
WiMAX is technically also known as “IEEE ”
WiMAX is a wireless communications standard designed for creating Metropolitan Area Networks(MANs).
It is similar to the Wi-Fi standard, but it can broadcast as big as 3,000 square miles.

5. Architecture of WiMAX A WiMAX system consists of two parts:
WiMAX receiver:
The receiver could be a small box or PCMCIA card, or they could be built into a laptop the way Wi-Fi access is today.
WiMAX tower:
It can provide cover to a very large area as big as 3,000 square miles.

7. Non Line of Sight Transmission Home Local Area Network
Internet Backbone
ISP Network
WiMAX Transmitter
Non Line of Sight Transmission
Line of Sight Backhaul
Home Local Area Network

8. Comparison with other Wireless Technologies

9. Maximum Speed Supported
WiMAX Mbps
3G - up to 2 Mbps
Wi-Fi - up to 600 Mbps
Mobile-Fi -- up to 80 Mbps

10. Coverage Area WiMAX 802.16a/Rev d - 30 Miles Max
WiMAX – 3 Miles
WiMAX e Miles.
3G and Mobile-Fi - 5 Miles
Wi-Fi feet
Wi-Fi router - 30 Feet

11. Airwave Channel Condition
3G and Mobile-Fi are the licensed ones
WiMAX can be either Licensed or Unlicensed
Wi-Fi is an unlicensed one.
Channel Condition
The WiMAX , 3G and Wi-Mobile is optimized for Outdoor Non- Line of Sight
Wi-Fi is Line of Sight based.

12. Quality of Service WiMAX 802.16 Grant request MAC
Designed to support voice and video from the start
supports differentiated service levels and centrally enforced QoS
Wi-Fi
Contention – based MAC
No guaranteed QoS
Standard Cannot guarantee latency for voice or video
No allowance for differential levels of service on a per user basis
Proposed e QoS standard is prioritization only

13. Bandwidth WiMAX 802.16 - 20-28 MHz 802.16a/Rev d - 1.5 -210MHz
802.16e - 3.6MHz
Wi-Fi MHz
Wi-MAX supports Maximum 5.0 bps/Hz
Wi-Fi Supports only up to a maximum 2.7 bps/Hz.

14. Scalability
For WiMAX
the channel bandwidths can be chosen by the operator for the sectorization and scalable independent of bandwidth with 1.5MHz to 20MHz width channels
MAC also supports thousands of users
where as Wi-Fi has only wide 20MHZ channels and MAC only supports tens of users.

15. Advantages
WiMAX is surely an advanced technology when compared with the other technologies with more
Bandwidth
Bit rate
Coverage area
Performance
Quality of service and secure too.

16. Disadvantages Interference with Bluetooth wireless communication
The cost of equipment is really high and it has not yet widely used.
Power-consuming technology
High installation
Signal interruption in bad weather

17. 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.

18. Thank You

19. QUERIES ?
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