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
  • Wi Max1

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