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Slide 1: 

WiMAX Opportunities and Challenges in a Wireless World By- Mohit Mittal

Contents : 

Contents Introduction Working of WiMAX IEEE 802.16 Standard IEEE 802.16 Family WiMAX benefits Advantages of WiMAX over WiFi Advantages of WiMAX over 3G Future of WiMAX

Think of Internet : 

Think of Internet There are three possible ways to access internet. Broadband access Uses DSL or cable modem at home and T1 or T3 line at office. WiFi Uses WiFi routers at home and hotspots on the road. Dial Up Connection


NEW TECHNOLOGY Broadband access is too expensive and WiFi coverage is very sparse. The new technology promises High speed of broadband service Wireless rather than wired access Broad Coverage

What is WiMAX? : 

What is WiMAX? WiMAX stands for Worldwide Interoperability for Microwave Access . WiMAX refers to broadband wireless networks that are based on the IEEE 802.16 standard, which ensures compatibility and interoperability between broadband wireless access equipment . WiMAX, which will have a range of up to 31 miles, is primarily aimed at making broadband network access widely available without the expense of stringing wires (as in cable-access broadband) or the distance limitations of Digital Subscriber Line.

Slide 6: 

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

Slide 7: 


WiMAX(IEEE 802.16) : 

WiMAX(IEEE 802.16) Range- 30 miles from base station Speed- 100 Megabits per second Frequency bands- 2 to 11 and 10 to 66 (licensed and unlicensed bands respectively) Defines both MAC and PHY layer and allows multiple PHY layer specifications

IEEE 802.16 Family : 

IEEE 802.16 Family 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 802.16d Improvement and fixes for 802.16a 802.16e Addresses on Mobile Enable high-speed signal handoffs necessary for communications with users moving at vehicular speeds


BENEFITS OF WiMAX Speed Faster than broadband service Wireless Not having to lay cables reduces cost Easier to extend to suburban and rural areas Broad Coverage Much wider coverage than WiFi hotspots

Benefits to Service Providers : 

Benefits to Service Providers Allow service providers to deliver high throughput broadband based services like VoIP, high-speed Internet and Video. Facilitate equipment compatibility. Reduce the capital expenditures required for network expansion. Provide improved performance and extended range.

Benefits to Customers : 

Benefits to Customers Range of technology and service level choices from both fixed and wireless broadband operators. DSL-like services at DSL prices but with portability. Rapidly declining fixed broadband prices. No more DSL “installation” fees from incumbent.



Slide 15: 

1. Relative Performance WHY NOT WiFi

2. Range : 

2. Range

Advantages of WiMax over 3G : 

Advantages of WiMax over 3G WiMax spectrum is more economical than 3G. The price paid per Hz is as much as 1000 times lower than for 3G spectrum. The low cost is a clear driver for service providers to enter the field of wireless services with WiMax.

Advantages of WiMax over 3G : 

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 interoperable solutions enable economies of scale through integration of standard chipsets, making WiMAX Forum Certified products cost-effective at delivering high-capacity broadband services at large coverage distances in Line Of Sight and Non Line Of Sight conditions.


FUTURE WiMax will be deployed in three stages In the first phase WiMaX technology (based on IEEE 802.16-2004) provides fixed wireless connections. In the second phase WiMaX will be available as a cheap and self-installing Subscriber Terminal (ST), linked to PC and to antenna. The third phase enables portability, thus WiMAX (based on IEEE 802.16e) will be integrated into commercial laptops.

References : 

References www.ewh.ieee.org/r4/chicago/Yu-WiMAX.pdf http://computer.howstuffworks.com/wimax.htm www.wimaxforum.org http://standards.ieee.org/catalog/olis/lanman.html

Slide 21: 

21 THANK YOU We cannot predict the future, but we can help to make it much better.

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