1. doc.: IEEE 802.11-15/0754r0 Submission July 2015 Jim Lansford, CSR TechnologySlide 1 IEEE 802.11ax High Efficiency WLAN WLAN Packet traffic and efficiency analysis Date: 2015-07-13 Authors:

2. doc.: IEEE 802.11-15/0754r0 SubmissionJim Lansford, CSR Technology 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 July 2015 Slide 2

3. doc.: IEEE 802.11-15/0754r0 Submission 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 July 2015 Jim Lansford, CSR TechnologySlide 3

4. doc.: IEEE 802.11-15/0754r0 Submission Sample Wireshark trace (Starbucks - Pearl Street) July 2015 Jim Lansford, CSR TechnologySlide 4

5. doc.: IEEE 802.11-15/0754r0 Submission Pearl Street – retail/commercial July 2015 Jim Lansford, CSR Technology Pearl St. Wi-Fi Frame length (bytes) Frame Name Number of framesMaxMin 802.11 Block Ack 10564 Acknowledgment 56946 Action 796963 Authentication 166 Association Request 1200 Association Response 1167 Beacon 302438399 CTS 74746 Data 37297890 Deauthentication 162 Null function (No data) 12056 Probe Request 17729678 Probe Response 1495488138 QoS Data 107620122 QoS Null function 158 RTS 33952

6. doc.: IEEE 802.11-15/0754r0 Submission Pearl Street – retail/commercial July 2015 Jim Lansford, CSR TechnologySlide 6 Lightly loaded network Many AP’s – lots of probe responses compared to probe requests (10x)

7. doc.: IEEE 802.11-15/0754r0 Submission Pearl Street – retail/commercial July 2015 Jim Lansford, CSR TechnologySlide 7 Approx 11ms of data

8. doc.: IEEE 802.11-15/0754r0 Submission Residential time occupancy July 2015 Jim Lansford, CSR TechnologySlide 8

9. doc.: IEEE 802.11-15/0754r0 Submission Pearl Street time occupancy July 2015 Jim Lansford, CSR TechnologySlide 9

10. doc.: IEEE 802.11-15/0754r0 Submission Campus time occupancy July 2015 Jim Lansford, CSR TechnologySlide 10

11. doc.: IEEE 802.11-15/0754r0 Submission 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 July 2015 Jim Lansford, CSR TechnologySlide 11