CTS 153: Recap of 2018 & Starting 2019

We made it to the end of 2018! In our final episode of the year, we wanted to recap the show and its top episodes. There are some good episodes to listen to or if you already have, listen to them again!

Additionally, we wanted to share some brief stats about the show and how we’ve grown. Then we’ll share about what’s to come in 2019 for Clear To Send.

Top 10 Episodes of 2018

1 – CTS 137: MIMO
2 – CTS 106: 802.11ax with Broadcom
3 – CTS 108: Useful Wi-Fi Metrics To Track
4 – CTS 109: Ekahau Sidekick, Spectrum Analysis, & Finnish Rap
5 – CTS 123: Design Principles for Stadium Wi-Fi
6 – CTS 130: RF Characteristics
7 – CTS 107: What’s The Purpose of Cisco CleanAir
8 – CTS 138: CWNA with Coleman and Wescott
9 – CTS 134: Understanding the 4-Way Handshake
10 – CTS 125: 802.11 Frame Captures for Windows

Some stats:

  • 52 episodes for this year!
  • Now over 14k downloads per month
  • 4900 downloads in January 2018

Top countries:

  • 1 – US
  • 2 – UK
  • 3 – Australia
  • 4 – Portugal
  • 5 – Canada

Looking into 2019:

We are looking at providing some sort of Deep Dive into topics. Some of the content involved would include examples from real world data, how tests were performed, and the results we learned from the Deep Dive.

Additionally, we will look at including some video content to supplement the audio podcast.

When it comes to video, we may plan on doing a few webinars to answer questions from the listeners.

Links & Resources

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CTS 127: Stadium Wi-Fi Implementation

Ensuring the stadium Wi-Fi implementation goes according to the design.

Stadium Wi-Fi Implementation

Chris Reed joins the show to follow up on his stadium Wi-Fi design episode to discuss the implementation portion. He joined us back on Episode 123 where he went into the design of Wi-Fi within large public venues or stadiums.

A wireless network is more than just Wi-Fi. Improperly sized, configured, or issues will cause “The Wi-Fi isn’t working” Doesn’t matter if you don’t own these, understand their layout, and ask the questions to make sure it’s not going to bite you.

Understand the associated network functions that go into a proper network implementation, beyond the Wi-Fi. Things such as Internet bandwidth, wired infrastructure, DNS, and DHCP.

Documentation is always a critical piece of the design and implementation. You should have the output from your design software to hand off and to use for your validation. This includes some sort of visualization of different install models for cable installers.

Walkthroughs are a must for stadium Wi-Fi implementation. Walk through with your installer, every space. This is their chance to speak up, ask questions, and for you to get things clarified. It’s up to you to make sure installers are following your standards. There are lots of bad Wi-Fi engineers, and these installers may have been working with them. You can find these at

Run through the “why?” of your design. Why is it important the angle is right, why is it important they aren’t near the DAS antenna? And also very important, where are the antenna leads supposed to be connected to?

When it comes to configuration, are you still using the GUI? Let’s assume 1,400 APs, and there are 5 settings / functions to configure – name, description, channel, antennas, power. Assume a 1% error rate (you’re pretty good at this). You’re going to get 70 configuration settings wrong Oh, and now the customer wants to change the naming convention. Have fun 🙂

This should be scripted. If you aren’t able to, hire someone to script it.

Understand what you are tweaking and tuning before you make changes. RXSOP, or probe suppression, or RSSI based disassociation, or airtime fairness are all vendor specific. Understand what the feature actually does vs what it says it does. There may be client limitations to features that you’ll blow through.

Validation is more than validating configuration and design. It’s also about validating the user experience. Don’t forget about:

  • The noise floor increase that will occur with people there
  • Butts in the seats if you’re doing under seat and the attenuation you’ll get
  • Your survey adapter is better than the target clients

Do you have any comments or questions? Let us know down below in the comments section.

CTS 123: Design Principles of Stadium Wi-Fi

François Vergès and Chris Reed join forces on Clear To Send to talk about design principles of stadium Wi-Fi. 

Designing Stadium Wi-Fi

What are important considerations when designing Wi-Fi for very high density environment such as stadium? Of course the tools come to mind such as Andrew Von Nagy’s Capacity Planner and Ekahau Site Survey Pro.

In the initial design, there are different types spaces in stadiums to consider such as bowl, concourse, suites, office space, and event space. The details are discussed in the episode.

Fundamentals are always important. But they are often missed in many deployments. Things such as getting the AP as close to the client as possible, minimizing co-channel contention, transmit power, attenuation, etc. Another consideration, but often difficult to plan for in stadiums, are client devices.

An challenging aspect of stadium Wi-Fi design is AP placement. There are different ways to approach this such as overhead, railing, and underseat. Which one is best for the design and what the pros and cons.

Links & Resources