There are a lot of things to take note before we going to deploy 2.4GHz Wireless Network.
If we select channel wrongly, stability and performance of our Wireless Network and it’s client will impact badly.
As we know that we can get Channel 1 to 11 (1 to 13 in some devices) for 2.4GHz spectrum.
A few channels are only non-overlap among these channel.
Channel 1,6 and 11 for range between 1 to 11 are not overlap.
Channel 1,5,9 and 13 for range between 1 to 13 are not overlap.
Currently, many wireless routers automatically select the channel for you upon initial setup, where depending on your wireless environment, it could lead to slow Wi‑Fi speeds and interference.
It is not always right to configure Automation on channelization on Standlone or Controller Base Wireless devices.
The following explanation will describe what interference you're dealing with and takes you through the steps to selecting the right channel, so you can understand why you should choose between channel 1, 6 and 11 or channel 1,5,9 and 13.
1. Co-Channel interference
Every client and access point on the same channel competes for time to talk as Wi-Fi devices working with Half-Duplex.
2. Adjacent-Channel interference
Every client and access point on overlapping channels talk over each other.
Adjacent-Channel interference on the other hand is where you run into problems and channel selection becomes critical. Luckily, these channel related interferences can be reduced or eliminated by selecting the proper Wi‑Fi channel for your network.
3. Non-Wi‑Fi interference
Analog Camera, CCTV, Cordless Phone and Microwave Oven, etc are also using same frequency 2.4GHz and they can interference your Wireless Network stability and performance too.
So, we need to select the right Channel for our Wireless Network.
Check below example screenshot which taken by using insider Home (one of the free Wireless Channel Scanner application).
We should choose to configure SINGTEL-931_EXT Wireless from Channel 1 to Channel 11 according to above screenshot as Channel 11 has less devices and less co-channel and less over-lapping channel.
This is the best configuration for Wireless Setting for Standlone Device .
If we are using Controller Base Wireless Device, we got to use this method too. Just need to ensure to check that we are going to select less devices, less co-channel and over-lapping channel.
Using more than one AP or Wireless Router with more than SSID also need to select and balance the Channel among non-overlapping channel 1,6,11 or 1,6,9,13.
That’s why configuring Wireless Broadcasting Devices or Wireless Controller as Auto Channelization , Auto Channel Width are not always right as we might need to hardcode it manually in some situation.
To do so, you will need and can find free or paid Wireless Channel Scanner application on Internet.
I’ll write about other Wireless post sooner or later. :D
Have a good time.
(Be knowledgeable, pass it on then)