1. (Worldwide Interoperability for Microwave Access)
WIMAX
(Worldwide Interoperability for Microwave Access)

2. Contents Introduction Working of WIMAX IEEE 802.16 standard
Architecture
IEEE Specifications
Features of WIMAX
Advantages of WIMAX over WIFI
WIMAX vs. 3G
ISSUES in WIMAX vs. 3G
FUTURE OF WIMAX

3. What is WIMAX?
WIMAX stands for Worldwide Interoperability for Microwave Access
WiMAX refers to broadband wireless networks that are based on the IEEE 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.

4. 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

5. 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

6. A WIMAX system consists of
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 and antenna could be a small box or Personal Computer Memory card, or they could be built into a laptop the way WiFi access is today

7. WIMAX TOWER WIMAX RECEIVER

9. WIMAX Scenario
Consider a scenario where a WiMax-enabled computer is 10 miles away from the WiMax base station.
A special encryption code is given to computer to gain access to base station
The base station would beam data from the Internet required for computer (at speeds potentially higher than today's cable modems)

10. WIMAX Scenario
The user would pay the provider monthly fee for using the service. The cost for this service could be much lower than current high-speed Internet-subscription fees because the provider never had to run cables
The WiMAX protocol is designed to accommodate several different methods of data transmission, one of which is Voice Over Internet Protocol (VoIP)
If WiMAX-compatible computers become very common, the use of VoIP could increase dramatically. Almost anyone with a laptop could make VoIP calls

11. WIMAX CHIPS
WiMAX Mini-PCI Reference Design Intel’s first WIMAX chip

12. FEATURES OF WIMAX
Scalability
Quality of Service
Range
Coverage

13. RANGE Optimized for up to 50 Km
Designed to handle many users spread out over kilometres
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

14. BENEFITS OF WIMAX Speed Wireless Broad Coverage
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

15. 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

16. Advantages of WiMax over 3G
Using an assortment of proprietary and standards-based technologies, such as OFDM and W-CDMA ,WiMax has a clear advantage over 3G
The advantages include
Higher Throughput
Low Cost
Lower Latency

17. Advantages of WiMax over 3G

18. USES OF WIMAX

19. FUTURE WiMax will be deployed in three stages
In the first phase WiMaX technology (based on IEEE ) 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 e) will be integrated into commercial laptops

20. Promises

21. ISSUES in 3G vs. WIMAX Deployment of the network
WIMAX deployment is in the planning stages and it might take 3-5 years in providing reasonable coverage in well populated areas
WiMax may initially be relegated to college campuses and larger corporate campuses where people are less mobile and costs containment is important

22. ISSUES in 3G vs. WIMAX Cost Issue
The main reason to opt for WIMAX is its low cost.
The price paid per Hz for WIMAX spectrum is as much as 1000 times lower than for 3G spectrum
The low cost of WIMAX spectrum compared to 3G is a clear driver for service providers to enter the field of wireless services with WIMAX

23. Conclusion (The Final Issue)
Will WIMAX replace 3G?
Along with the forthcoming standardization, WiMAX has the potential to substitute 3G and become a promising 4G
WiMAX has its distinct identity as either a stand-alone solution for incumbent and competitive fixed network operators or as complementary radio access solution for established 2G and 3G cellular network operators
Fixed-line operators, on the one hand, may consider WiMAX as a viable alternative to add mobility to the service portfolio, leveraging their huge subscriber base, in particular in countries where 3G licensing is delayed or not affordable

24. Thank U all
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