Do non-overlapping channels overlap?

We all know the "non-overlapping" channels 1/6/11 in 2.4GHz (5GHz matter is similar). Do they really not overlap? I keep bumping into this in conversations, and would like to create a point of reference (with pictures) instead of having to repeat same old over and over. Since we a dealing with broadband technology, the signal...

What 802.11ax is not

I normally do not publish the "link to" posts, preferring to share on LinkedIn, but Devin Akin well deserves it. Matches my perspective 98%+, especially the point on 802.11ac stillborn MU-MIMO. Preamble: Aerohive has released the first 802.11ax APs (the official 802.11ax standard spec is not final yet) - so expect the marketing race. TL...

WING5 CLI Tip: Running config at-a-glance

Often you have to deal with existing AP/Controller and need to understand what's configured on it. Of course, you can click 100500 times in the GUI all over the place, or read through 20+ pages of "show run" output (those who've been to my WING5 training should remember the little space-bar-thrashing exercise). For instance, the...

How Android measures WLAN signal strength

Ever wondered how Android decides how many bars to show in the WLAN indicator? (Well, the “bars” are gone, but there’s still exactly the same number of levels) While going through Android source code  I’ve found this:  >> WifiWatchdogStateMachine.java * RSSI levels as used by notification icon * Level 4  -55 <= RSSI * Level...

WING5 Q&A: Controller with local APs and remote APs. Which MiNT link levels to use?

This is a very popular question that is asked at literally every WING5 training (and, I must admit, due to misinterpretation I was giving out the wrong answer, so read this). Getting those link levels is easy, troubleshooting the resulting system instability issues is not easy. We typically know that single-site scenarios use Level 1...

A perspective on IoT and Wi-Fi coexistence (WLAN Professionals Conference EU 2015)

Video of my talk at WLPC EU2015 on subject of IoT and it's impact on Wi-Fi.

What is nSight?

One of the three key highlight of WiNG 5.8 release is nSight - a new WLAN monitoring, visualization and troubleshooting support solution. I am currently demonstrating nSight as part on our WLN2018 next-gen WING5 class, and students seem to like it a lot. This post briefly outlines the key high-level ideas behind nSight. I'm planning...

Wi-Fi for IoT – a boon or a bane?

Is energy-efficient 802.11b chip a boon or a bane for modern WLANs?

WiNG 5.7 Release Summary

WiNG 5.7 is finally out and available on Support portal. Here's a brief summary of main features and comments about them. New product support. Because of the timing overlap some of the products released around 5.6 release were not actually supported by 5.6.x and were supported by special 5.5.x instead. Now everything is back to...

WLAN Channel Management F1 Style: Part 3 of 3

Final part of the mini-series. Time to check those guesses! There is an interesting commonality between the history and current state of RF/WLAN design and the design of F1 cars. Let's have a brief look at the history of grand prix racing. In the early days... ... of race cars the 'formula' was simple: bigger...