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Wireless LAN: Past, Present, and Future

This presentation by Steven Reno from the University of Wisconsin-Platteville explores the transformative journey of Wireless LAN, commonly known as Wi-Fi, from its historical beginnings to its current status and future advancements. Wi-Fi has revolutionized communication in homes, offices, and public spaces. The talk covers the evolution of standards set by IEEE, highlights current applications, and addresses challenges such as security and range. With continuous improvements in technology, the future promises even faster and more reliable wireless connections.

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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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