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Wireless LAN: Past, Present, and Future

Wireless LAN: Past, Present, and Future. Steven Reno Department of Computer Science University of Wisconsin- Platteville renosteven@gmail.com. Contents. Introduction History Wi-Fi Today The Future of Wi-Fi Current Applications Problems Conclusion. Introduction. Nation of Convenience

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Wireless LAN: Past, Present, and Future

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  1. Wireless LAN:Past, Present, and Future Steven Reno Department of Computer Science University of Wisconsin- Platteville renosteven@gmail.com

  2. Contents • Introduction • History • Wi-Fi Today • The Future of Wi-Fi • Current Applications • Problems • Conclusion

  3. Introduction • Nation of Convenience • Stores • Fast-food • Microwaves • Remote-controls • And now…Wireless LAN • Ease of use

  4. Introduction • Wireless Telegraph- late 19th century • Morse Code • Radio- after telegraph/telephone • No speech at first

  5. Introduction • Wireless LAN • Wireless Fidelity (Wi-Fi) • Usage Today • Homes • Offices • Public places • Devices • Computers • Smartphones • Music players • Appliances

  6. Introduction • IEEE- Institute of Electrical and Electronics Engineers • LAN • 802.3 • WLAN • 802.11 • Wireless- a very broad field • Cellular • Home telephony • RFID

  7. History • The need for WLAN • First WLAN • ALOHAnet(1970) • First Devices • ARLAN-SST (1988) • RangeLAN (1989) • 802.11 committee

  8. History • RangeLAN2 (1994) • 802.11-1997

  9. Wi-Fi Today • IEEE established the standard- 802.11 • First two amendments adopted: • 802.11a • 802.11b

  10. Wi-Fi Today • 802.11g • Best of both worlds (from a/b) • 802.11b remains dominant

  11. Wi-Fi Today • Wireless Ethernet Compatibility Alliance (WECA) • Now, Wi-Fi Alliance • Interoperability testing • Certification of 802.11 products

  12. Future of WLAN • 802.11n • Increase Throughput • Increase Range • Multiple Input Multiple Output (MIMO) • Spatial Division Multiplexing (SDM) • Channel Width

  13. More 802.11n • Backwards Compatibility • Dual Mode • 2.4 GHz Mode • Draft 802.lln • Certified Since 2007

  14. Applications of WLAN • Offered to Customers • Attract • Stay • Example- coffee shops

  15. Applications of WLAN • Business Travelers • Airports • Airplanes • Hotels • Conference Centers • College Students • Campus Wi-Fi

  16. Problems • Security • Prevent Unauthorized Access • WEP • WPA • MAC ID Filtering

  17. More Problems • Range • Propagation • Natural Interference • Man-Made Interference

  18. Conclusion • Constant Technology Improvement • Faster • Longer Range • More Secure • Future • IEEE • 802.11n • Throughput • Range • Backwards Compatibility

  19. Conclusion • Wireless Culture • Retail • Business • College • Few Problems • Security • Range • Propagation

  20. References • Derfler, F., & Freed, L. (2005). How Networks Work. Indianapolis: Que Publishing. • Flickenger, R. (2007). Wireless Networking in the Developing World. Hacker Friendly LLC. • IEEE 802.11. Wikipedia. Retrieved Nov. 2, 2009 <http://en.wikipedia.org/wiki/IEEE_802.11>. • Learn About Wireless Antennas. Retrieved Nov. 2, 2009. <http://www.wirelessantennahelp.com/index.htm>. • Negus, K. J. (2008, Apr. 4). History of WLANs in the Unlicensed Bands. 1-13. Retrieved Nov. 2, 2009. • Stallings, W. (1005). Wireless Communications and Networks. Upper Saddle River: Pearson Prentice Hill. • Wireless LAN. Wikipedia. Retrieved Nov 2, 2009 <http://en.wikipedia.org/wiki/Wireless_LAN>. • Wireless Without Compromise: Delivering the promise of IEEE 802.11n.Meru Networks Retrieved Nov. 2, 2009.

  21. The End • Any Questions?

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