DWCC stats from SouthEast Linux Fest

I deployed DWCC(https://github.com/zunder1990/Distributed-Wifi-Capability-Collector) for the first time at a large event. I was only able to get one node running, and was only able to capture packets on the following channels: 1,6,11,36,52,56,100,116. With one node running for two days and only capturing the management and control part of the wireless packets, I got 17gb of PCAPs.

Here are the results (only counting when client was talking with AP and not when client was probing broadcast):

2.4ghz clients204
5ghz clients90Note: I was only able capture a few of the 5ghz channels
802.11k clients110 Provides information to discover the best available access point
BSS Transition/802.11r/FT231Allows for faster roaming between APs
QOS map53RFC 8325 tells you if the client is able to set DSCP value on packets it sends
receive frames from mu-mimo AP31Says if client is able to receive packets send from AP while doing mu-mimo
receive frames from single user beamforming AP51Says if the client is able to understand an AP trying to beamform
Transmission of STBC-coded frames28Space-Time Block Coding (STBC) can be used when the number of radio chains exceeds the number of spatial streams.
Extended Channel Switching80Provides a mechanism for an access point to notify the stations connected to it of its intention to change channels or to change channel bandwidth.
Orthogonal Frequency-Division Multiplexing OFDM126
WNM-Sleep Mode45Power save mode
Multiple BSSID13Client can understand when one than one BSSID is in a beacon packet from an AP
802.11w40 Protected Management Frames 

43Related to hotspot2.0

wnm notification
59Related to 802.11v

receive LDPC-encoded frames
51Clients able to understand frame encoded in low-density parity-check, related to Transmission of STBC-coded frames

Timing Measurement
9802.11mc, allows the client to tell how far it is from the AP,  3.3 nanoseconds per meter


About Zach Underwood

I have worked in both a commercial data centers, local government and ISPs. I have experience includes setup of VMware stack using ESX and Vcenter to reduce the number of servers, setup internal WI-FI systems, designed GPO for windows desktop, and deployed Linux thin clients for public kiosks. I have also provided server administration and support, desktop user support, and computer equipment troubleshooting.

  • Red Hat Certified System Administrator Ver. 7 License number:100-206-556 January 2015
  • Red Hat Certified Engineer Ver.6 License number:100-206-556 June 2011
  • Red Hat Certified System Administrator Ver. 6 License number:100-206-556 July 2011
  • Red Hat Certified System Administrator Ver. 5 License number 100-206-556 August 2010
  • Red Hat Certified Technician Ver. 5 License number:100-206-556 August 2010
  • Ubiquiti airMAX-Certified Admin September 2013
  • Commtrain/NATE Certified tower climber March 2014

Videos that I have done

Greenville Tech ad that aired on TV

Linux user group talk about BGP and Net Neutrality

Interview I did with Jupiter Bradcasting about Wireless ISP and tower climbing

This is a talk that I gave at the South East Linux Fest 2015

This is a talk that I gave at the South East Linux Fest 2015

This is a talk that I gave at the South East Linux Fest 2014

Interview I did with Jupiter Bradcasting