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Wi Max1

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  • Image of the Los Angeles area from NASA's Shuttle Radar Topographic Mapping project, with color-coding of topographic height. (NASA JPL)
  • . www.wimaxforum.org
  • Transcript

    • 1. WIMAX
      • PRESENTED BY
      • ____________________________
      • __________________________________________
      • ____________________________________________
    • 2. INTRODUCTION
      • WIMAX-The worldwide Interoperability for microwave access.
      • It is based on the IEEE 802.16 standard , which is also called wireless MAN.
      • The name WIMAX was created by the WIMAX-forum, which was formed in June 2001 to promote conformance and interoperability of the standard.
    • 3. DEFINATION:-
      • 802.16  it is not the actual standard .The is correctly called 802.16.2004
      • 802.16e  It is amendment to 802.16-2004.It is properly referred to as 802-16e-2005
      • FIXED WIMAX  Systems built using 802.16-2004 as air interface technology.
      • Mobile WIMAX  System built using 802-16-2005 as air technology.
    • 4. USES:
      • Connecting wi-fi hot spots with each other and to other parts of the internet.
      • Providing a wireless alternative to cable and DSL for last mile (last km) broadband access.
      • Providing high speed data and telecommunication series.
      • Providing normadic connectivity.
    • 5.
      • BRAOD BAND ACCESS:-
      • Many companies are closely examining WIMAX for “last mile” connectivity at high data rates.
      • It could result in lower pricing for both home and business customers as competition lower prices.
      • SUBSCRIBERS UNITS :-
      • Indoor version.
      • Outdoor version.
      • MOBILE APPLICATION :-
      • Cellular companies are evaluating WIMAX as a means of increasing band width for a variety of data intensive applications.
      • WIMAX can enhance wireless infrastructure in an inexpensive way.
    • 6. TECHNICAL INFORMATION
      • WIMAX is very different from WI-FI in the way it works.
      • MAC (media access controller)-It provides addressing and channel access control mechanisms.
      • PHYSICAL LAYER
      • 80.2.16-2004 was updated to 802-16-2005 and uses scalable orthogonal frequency division multiple access (SOFDMA) as opposed to the OFDM version (256 sub carriers).
      • It also uses multiple antenna support through MIMO (multiple input multiple output communications).
    • 7. SPECTRUM ALLOCATION ISSUES
      • The 802.16 specification applies across a wide swath of the RF spectrum.
      • There is no uniform global licensed spectrum for WIMAX.
      • US will 2.5 GHz and Asian countries like India ,Vietnam and Indonesia will use 3.3
      • GHz.
      • Manufactures are compelled to provide multi-spectrum devices.
      • WIMAX has advantage of spectral efficiency. (WIMAX—spectral efficiency is 3.7 bits/s/Hz). (WI-FI—spectral efficiency is less than 1 bit/s/Hz).
    • 8. SILICON IMPLEMENTATION
      • Requirement of low cost chipsets .
      • Intel is a leader in promoting WIMAX and developed its own chipsets.
      • Some of the other semiconductor companies which work on WIMAX are-[Alter, Beceen, GCI, Runcom, picochip (chipsets for base station)].
      • Comparison with wi-fi
      • WIMAX is a long range system that uses licensed or unlicensed spectrum.
      • Wi-fi is a short range system that uses unlicensed spectrum .
    • 9. LIMITATION
      • A commonly held misconception is that WIMAX will deliver 70 bits/sec over 30 miles.
      • WIMAX devices typically have an antenna which is of lower gain by nature due to their inherent omni directional design.
      • COMPETING TECHNOLOGIES
      • WIMAX main competition comes from existing deployed wireless system such as
      • UMTS
      • CDMA 2000
      • HIPERMAN
      • WIBRO(S.KOREAN)
    • 10. REFERENCES
      • www.wikipedia.org
      • www.wimaxforum.org
    • 11. THANK YOU