WifiNigel

I put this page together so that I have one place to come to for my Wi-Fi power conversion utilities and lookup tables. Hope you find it useful.( Note : you will need Javascript enabled to use these calculators) Check out my other Wi-Fi RF calculators: link Milliwatt to dBm Convertor Enter a value in milliwatts and hit the 'Convert' button to see the dBm conversion: Enter milliwatt value: (mW) dBm Conversion: ---- (dBm) dBm to Milliwatt Convertor Enter a value in dBm and hit the 'Convert' button to see the milliwatt conversion: Enter dBm value:  (dBm) mW Conversion  : ---- (mW)   dBm & Milliwatt Lookup Tables mW to dBm Lookup Table dBm to mW Lookup Table mW dBm dbm mW 1 0 0 1 2 3 1 1.3 3 4.8 2 1.6 4 6 3 2 5 7 4 2.5 10 10 5 3.2 15 11.8 6 4 20 13 7 5 25 14 8 6.3 30 14.8 9 7.9 35 15.4 10 10 40 16 11 12.6 45 16.5 12 15.8 50 17 13 20 55 17.4 14 25.1 60 17.8 15 31.6 65 18.1 16 39.8 70 18.5 17 50.1 75

One term you'll often hear banded about when talking with Wi-Fi professionals is "sticky clients". I thought it might be worth spending a few moments exploring what is meant by "sticky clients", why they are generally considered to be a bad thing in Wi-Fi networks and some approaches to mitigate them. Background Many folks dealing with Wi-Fi networks often talk about the "sticky" characteristics of wireless clients when discussing client roaming within a W-iFi network. In an ideal world, we'd like to have access points providing ubiquitous coverage across our desired area providing high-quality, consistent client coverage where-ever we go. In this wonderful land of rainbows and unicorns, our clients would gracefully roam from AP to AP, detecting and associating with their closest AP throughout the coverage area to ensure their best connection speed at all times. Unfortunately, the real world doesn’t quite reflect this roaming-client

[Note: The information in this white paper has been superseded. Check out my updated white paper:  http://wifinigel.blogspot.co.uk/2018/05/updated-white-paper-on-license-exempt.html ] I decided it was time to update my white paper detailing the use of the 5GHz band here in the UK for wireless LANs. I've tidied a few things up and added some information around 802.11ac channel planning within the constraints of UK 5GHz spectrum. You can download the whitepaper from here: PDF download Google docs Scribd

One thing that keeps me awake at night is the whole concept of Co-channel interference in WiFi networks (well, that and acid reflux) . I'm always concerned by it's presence in a Wireless LAN, how to detect it, how to avoid it and how to measure its effect. In this article I share a tip I picked up from a recent Cisco webinar to determine the general level of utilization of an AP's channel. I also look at how this may give us a clue about the level of CCI in a Cisco wireless network. Background Co-channel interference (CCI), co-channel contention (CCC)...whatever you want to call it (I'm growing quite fond of the term "Co-channel Chatter"), is a blight in many WiFi networks. In all but the most isolated and carefully designed of wireless LANs, it lurks, waiting to disrupt the efficient operation of our WiFi network. As the number of WiFi networks rises, AP channel-widths increase (with newer WiFi standards) and the population of WiFi devices explodes, th