WiMAX

Think about how you access the internet today.

There are basically three different options:BROADBAND ACCESSWIFI ACCESSDIAL-UP ACCESS

The main problems with broadband access are that it is pretty expensive & it doesn’t reach all areas.

The main problem with WIFI is that hot spots are very small, so coverage is sparse.

INTRODUCTION

What if there were a new technology that solved all of these problems?

This new Technology would provide:-

High speed of broadband service Wireless rather than wired access That is less expensive than cable Much easier to extend to rural areas Broad coverage like cell phone networks.

ALL THIS IS POSSIBLE WITH WIMAX

Before WIMAX <---wi-fi ^ | | Infrared-Bluetooth ^ | |Cables -Optical Fiber

WHAT IS WIMAX? Worldwide Interoperability for Microwave Access. WIMAX is a wireless digital communications system also

known as IEEE 802.16. WiMAX was seen as more of a Metropolitan Area

Network (MAN) technology providing a much larger coverage.

WIMAX can provide broadband wireless access up to 30 miles(50 km) for fixed stations and 3-10 miles(5-15 km) for mobile stations.

Next generation of wi-fi. Wi- max is the fast emerging wide area wireless broad

band technology.

Promise of potential low cost and flexibility in building broadband networks.

Scalability, as extra channels and base stations can be added incrementally as bandwidth demand grows.

Support for both voice and video as well as Internet data.

Broad Coverage High speed up to 70 Mb/sec.

Why is it Interesting?

WIMAX SPEED

How WIMAX 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.

WiMAX Architecture

MIB – Management Information Base

WiMax can provide 2 forms of wireless service:

Non-LOS, where a small antenna on your computer connects to the tower in the low frequency range of 2-11 GHz.

LOS, where a fixed antenna points straight at the WiMax tower from a rooftop or pole. The LOS connection is stronger and more stable, so it is able to send a lot of data with fewer errors. Uses higher frequencies, with ranges reaching a possible 66 GHz.

Through stronger LOS antennas, WiMax transmitting stations would send data to WiMax enabled computers or routers set up within 30 mile radius.

TYPES OF WIMAXFIXED WIMAX:

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.

MOBILE WIMAX:Mobile WIMAX implementations can be used to deliver both fixed & mobile services It offers superior building penetration and improved security.

IEEE Standards

10 - 66 GHz Short wavelength Line-of-sight (LOS) required Negligible multipath

2 – 11 GHz Longer wavelength Improved range and in-building penetration LOS not required Multipath effects may be significant

Characteristics of WiMax

Frequency Ranges

Cost Effective

There are areas of the world-especially in rural areas-where deploying wired broadband infrastructure is not cost effective.

In this case WIMAX is very cost effective.

High speed of Broadband service

Another benefit of WIMAX is the ability to get a higher connection speeds farther away from the transmitter.

Stands for Wireless Fidelity. Brand licensed by the Wi-Fi Alliance. Wi-Fi is a local area network technology that was

originally thought to replace the thousands of miles of LAN cables.

Wireless Local Area Networks (WLAN) Based on IEEE 802.11

Wi-Fi

Difference Between WiMAX and Wi-Fi Range:

Optimized for up to 50 Km

Designed to handle many users spread out over kilometers

Designed to tolerate greater multi-path delay spread (signal reflections) up to 10.0μ seconds

PHY and MAC designed with multi-mile range in mind

StandardMAC;Sectoring/MIMO/AMC for Rate/Range dynamic tradeoff

Optimized for ~100 meters

No “near-far” compensation.

Designed to handle indoor multi-path(delay spread of 0.8μ seconds).

Optimization centers around PHY and MAC layer for 100m range.

Range can be extended by cranking up the power – but MAC may be non-standard.

802.16802.11

Bit Rate: Relative Performance

802.16a ~5.0 bps/Hz

~2.7 bps/Hz54 Mbps20 MHz

63 Mbps*10, 20 MHz;

1.75, 3.5, 7, 14 MHz;3, 6 MHz

802.11a

ChannelBandwidth

Maximumbps/Hz

MaximumData Rate

802.16a is designed for metropolitan performance

Optimized for outdoor NLOS performance

Standard supports mesh network topology

Standard supports advanced antenna techniques

Optimized for indoor performance

No mesh topology support within ratified standards

802.16802.11

Coverage

802.16 is designed for market coverage

Will WiMAX displace WiFi?

WiMAX will not replace WiFi completely, but work TOGETHER

Intel is currently integrating WiMAX and WiFi into a single Centrino chip.

WiFi’s primary role will always be autonomous hotspot service

areas (indoor and outdoor 0 ft. < cell radii <500 ft.).

WiMax will ultimately replace WiFi in large-scale in commercial and public roles.

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Wi-fi and WiMax Together

Wimax Coverage Wimax High Speed Multi-functionality within Wimax Technology Potential and development Stay in touch with end user Wimax Infrastructure Wimax, cheap network  Wimax Rich Features Wimax and Wifi Smart antenna and Mesh Topology

ADVANTAGES OF WIMAX

Lack of Quality WiMAX range WiMAX Bandwidth WiMAX rich features  Bad Weather Wireless equipments Power consuming Data Rate

DISADVANTAGES

FUTURE

Anywhere, Anytime, Connectivity

WIMAX offers the kind of service where you can get a connection, wherever u may be.

When WIMAX is fully developed, u will no longer be limited to 300 feet within the WIFI hotspot, & u won’t have to drive around looking for a connection….

CONCLUSION

WiMAX could bring broadband access into the homes and businesses of millions of people in rural and developing markets.

Portable Internet a reality

End-users to enjoy an “Always Best Connected”