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)
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