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

doc.: IEEE /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

doc.: IEEE /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

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

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

doc.: IEEE /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)

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

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

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

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

doc.: IEEE /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 July 2015 Jim Lansford, CSR TechnologySlide 11