20070205-cis6930-signal-map3

20070205-cis6930-signal-map3 - CIS 6930 Workshop Research...

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1 CIS 6930: Workshop Research Introduction and Lab Assignments Wireless Measurements: Shao-Cheng Wang ( [email protected] ) Trace Analysis: Wei-jen Hsu ( [email protected] ) Encounter-based Networks: Sapon Tanachaiwiwat ( [email protected] ) Gradient-based routing in Wireless Sensor Networks: Jabed Faruque ( [email protected] ) Instructor: Dr. Helmy 2/5/2007
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2 CIS 6930: Workshop I Wireless Measurements Presenter: Shao-Cheng Wang [email protected] Instructor: Dr. Helmy 2/5/2007
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3 Agenda Introduction Wireless measurement fundamentals Tools Assignment questions Reference
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4 How does a coverage map look like? http://www.ittc.ku.edu/wlan/images.shtml
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5 coverage maps (cont’d)
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6 Wireless fundamentals: SNR v.s. Distance
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7 Wireless fundamentals: SNR v.s. Performance SNR v.s. Delivery ratio (emulator) SNR v.s. Delivery ratio (real measurement) SNR v.s. TCP Tput (real measurement)
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8 Tools Site-surveyer: Netstumbler (www.netstumbler.com) Signal (in –dbm), SNR AP MAC, SSID
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9
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10 Tools (cont’d) HP iPAQ
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11 Tools (cont’d)
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