2. 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

3. 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

4. 3 802.11 Standards 802.11n Range Capacity Data Rate Why these matter

5. 4 Portability in Enterprises  Laptops & handheld computers  Cabling  Need for computers in common areas  Reliance on GroupWare  Applications in vertical industries

6. 5 802.11 Components Access points The user interface Switches Controllers Wireless access point Modem to the Internet Each computer has a Wi-Fi compatible card or chip & antenna

7. 6 Workgroup switches (which are on individual floors), access points, and a core switch in an enterprise network.

8. 7 Wi-Fi in Hot Spots Speed Convenience Benefits to providers

9. 8 A Clearinghouse for Single Sign on & Billing Clearinghouse passes billing data to WISP who bills user & pays clearing house a fee

10. 9 A secure virtual private network (VPN) connection between hotspots and enterprises using tunneling

11. 10 WISPs & Aggregators WISPs –Wayport –T-Mobile Aggregators –Boingo - billing “uber-aggregator” –GoRemote –iPass –Fiberlink

12. 11 Mesh networks

13. 12 Hot Spot Remote Access  Lost PDAs & laptops  Eavesdropping  Stolen data  Log in to WISP authenticated but data not secured

14. 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?

15. 14 Voice over IP on corporate 802.11 wireless networks

16. 15 Security Security on wireless services compared to that of wireline Software on access points or devices connected to corporate networks Software on clients

17. 16 What can go wrong? Unauthorized access Snooping Competitive information compromised Rogue access points

18. 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

19. 18 Implications for the CIO Complexity Vs. ease of administration

20. 19 Compared to cellular 13% of the cost of cellular data to provision* Stationary Speed Coverage * Craig Mathias, the Farpoint Group

21. 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?

22. 21 WiMAX service with overlapping wireless coverage between towers for redundancy

23. 22 WiMAX to Extend Wireline Networks Provider’s Tower Fiber ISP Customers’ antennas

24. 23 Bluetooth Short distances 2.4 GHz Standards Version 1 vs. Version 2 Bluetooth wireless links Palm

25. 24 RFID service in hospitals to manage assets

26. 25 Ultra-wideband (UWB) low-power signals

27. 26 A ZigBee partial mesh network

28. 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