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Wi-Fi, Wireless Broadband, Sensor & Personal Area Networks

Wi-Fi, Wireless Broadband, Sensor & Personal Area Networks. 802.11 Standards Applications Broadband Wireless Access WiMAX Adapting 3G for WBA: UMTS TDD Personal Area Networks: Bluetooth, RFID, UWB Sensor Networks - Zigbee Comparisons of Technologies & Applications. What is Wi-Fi?.

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Wi-Fi, Wireless Broadband, Sensor & Personal Area Networks

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  1. Wi-Fi, Wireless Broadband, Sensor & Personal Area Networks • 802.11 • Standards • Applications • Broadband Wireless Access • WiMAX • Adapting 3G for WBA: UMTS TDD • Personal Area Networks: Bluetooth, RFID, UWB • Sensor Networks - Zigbee • Comparisons of Technologies & Applications

  2. What is Wi-Fi? • A wireless Ethernet standard • Wi-Fi - (wireless fidelity) IEEE 802.11b, 802.11a & 802.11g • Why standards matter • The downside of standards

  3. 802.11 Standards • 802.11n • Range • Capacity • Data Rate • Why these matter

  4. Portability in Enterprises • Laptops & handheld computers • Cabling • Need for computers in common areas • Reliance on GroupWare • Applications in vertical industries

  5. Modem to the Internet Wireless access point 802.11 Components • Access points • The user interface • Switches • Controllers Each computer has a Wi-Fi compatible card or chip & antenna

  6. Workgroup switches (which are on individual floors), access points, and a core switch in an enterprise network.

  7. Wi-Fi in Hot Spots • Speed • Convenience • Benefits to providers

  8. A Clearinghouse for Single Sign on & Billing Clearinghousepassesbilling data to WISP who bills user & pays clearing house a fee

  9. A secure virtual private network (VPN) connection between hotspots and enterprises using tunneling

  10. WISPs & Aggregators • WISPs • Wayport • T-Mobile • Aggregators • Boingo - billing “uber-aggregator” • GoRemote • iPass • Fiberlink

  11. Mesh networks

  12. Hot Spot Remote Access • Lost PDAs & laptops • Eavesdropping • Stolen data • Log in to WISP authenticated but data not secured

  13. Wi-Fi in Homes • Why did residential customers use Wi-Fi earlier than business & commercial customers? • How will future residential applications differ from initial applications? • Is there a downside to Wi-Fi in homes?

  14. Voice over IP on corporate 802.11 wireless networks

  15. Security • Security on wireless services compared to that of wireline • Software on access points or devices connected to corporate networks • Software on clients

  16. What can go wrong? • Unauthorized access • Snooping • Competitive information compromised • Rogue access points

  17. Security Tools • WEP - Wired Equivalent Privacy • Easy to “crack” • Shared passwords • WPA (Wi-Fi Protected Access) 802.11i subset • 128 bit level of encryption - more scrambled • “Keys” between user & access point changed more frequently

  18. Implications for the CIO Complexity Vs. ease of administration

  19. Compared to cellular • 13% of the cost of cellular data to provision* • Stationary • Speed • Coverage * Craig Mathias, the Farpoint Group

  20. What about WiMAX? • 802.16d - fixed • 802.16e - mobile • Longer distances • MMDS - Multipoint Microwave Distribution System • Will these go the way of WinStar & Teligent?

  21. WiMAX service with overlapping wireless coverage between towers for redundancy

  22. WiMAX to Extend Wireline Networks ISP Fiber Provider’s Tower Customers’ antennas

  23. Bluetooth • Short distances • 2.4 GHz • Standards • Version 1 vs. Version 2 Palm Bluetooth wireless links

  24. RFID service in hospitals to manage assets

  25. Ultra-wideband (UWB) low-power signals

  26. A ZigBee partial mesh network

  27. Summary • Wi-Fi use in enterprises will increase when:___ • Hot spots compared to Cellular? • Will wane as 3G grows • Will outpace 3G • Explain the differences & similarities between fixed & mobile WiMAX • Compare: bluetooth, RFID, Ultra-Wideband & Zigbee

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