1 Wi-Fi, Wireless Broadband, Sensor & Personal Area Networks 802.11 –Standards –Applications Broadband Wireless Access –WiMAX –Adapting 3G for WBA: UMTS.

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Presentation transcript:

1 Wi-Fi, Wireless Broadband, Sensor & Personal Area Networks –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 b, a & g Why standards matter The downside of standards

Standards n 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

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

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 Clearinghouse passes billing 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 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) i 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? d - fixed e - 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 Provider’s Tower Fiber ISP Customers’ antennas

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

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