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Connectivity Measurements

Explore the correlation between RSSI and distance, examine packet loss versus RSSI, and analyze the impact of delay on distance through testing methods. Lessons learned include interference obstacles affecting RSSI and the relationship between RSSI and distance.

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Connectivity Measurements

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  1. Connectivity Measurements Alan Deguzman, David Zats, Matt Jones, Nam Vo

  2. Objectives • Determine correlation between RSSI and distance. • Find relationship between packet loss and RSSI. • Examine the effect of delay upon distance.

  3. Testing Method • TELNET into one of the non-gateway nodes and placed it close to the gateway. • Pinged the other non-gateway node, varying the distance by using the fact that 1 tile = 1 foot.

  4. RSSI vs. Distance

  5. Packet Loss vs. RSSI

  6. Delay vs. Feet

  7. Lessons Learned • Obstacles can cause significant interference (loss in RSSI) • Distance does not greatly impact delay • Do not see significant packet loss until RSSI approaches -92dBm • RSSI is not highly correlated with distance

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