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IEEE 802.11ax High Efficiency WLAN WLAN Packet traffic and efficiency analysis

IEEE 802.11ax High Efficiency WLAN WLAN Packet traffic and efficiency analysis. Date: 2015-07-13. Authors:. Overview. Assignment for students in Spring 2015 semester at University of Colorado – Boulder Capture packet traffic: >10k packets

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IEEE 802.11ax High Efficiency WLAN WLAN Packet traffic and efficiency analysis

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  1. IEEE 802.11axHigh Efficiency WLANWLAN Packet traffic and efficiency analysis Date: 2015-07-13 Authors: Jim Lansford, CSR Technology

  2. Overview • Assignment for students in Spring 2015 semester at University of Colorado – Boulder • Capture packet traffic: >10k packets • Monitor mode to capture traffic from all Access Points • On campus • On Pearl Street mall in Boulder • At residence • Analyze number of packets at each data rate • Estimate duration by data rate for the analysis interval • Shows amount of time spent on the air at each data rate • Illustrates efficiency of medium usage Jim Lansford, CSR Technology

  3. Method • Use Microsoft Network Monitor 3.4 to capture packets. • Save the captured data as .cap file and open the file through Wireshark. • Export the data from Wireshark and load it into an Excel spreadsheet • May have to write a program to analyze data • NOTE: The data date seems to get multiplied by two when importing into Excel!! • Using captured data, compile histogram of packet types • Using LENGTH field, estimate temporal occupancy Jim Lansford, CSR Technology

  4. Sample Wireshark trace (Starbucks - Pearl Street) Jim Lansford, CSR Technology

  5. Pearl Street – retail/commercial Jim Lansford, CSR Technology

  6. Pearl Street – retail/commercial • Lightly loaded network • Many AP’s – lots of probe responses compared to probe requests (10x) Jim Lansford, CSR Technology

  7. Pearl Street – retail/commercial Approx 11ms of data Jim Lansford, CSR Technology

  8. Residential time occupancy Jim Lansford, CSR Technology

  9. Pearl Street time occupancy Jim Lansford, CSR Technology

  10. Campus time occupancy Jim Lansford, CSR Technology

  11. Summary • Mostly what you would expect: • Lots of 1Mbps traffic • Lots of beacons at 1Mbps • Lots of probe request/probe response traffic • Majority of traffic in most environments is 1Mbps • Raw files available for further analysis • Send me an email Jim Lansford, CSR Technology

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