Channel Selection

[NismoZ]

I've done a bunch of research on this, and have seen the channel maps like this one: http://www.networkcomputing.com/wireless/channel-bonding-wifi-rules-and-regulations/199326059

Question, if a neighbor is on channel 48 with a 40Mhz, and I am on channel 36, a selection of 80Mhz, would our signals overlap?

If they do overlap, would data transmission have to wait until one or the other is free on that 48 channel?

 

[pege63]

You can find your answer here.
If your neighbor is on ch 48 with 40Mhz he taking up the ch space 44, 48.
And you taking up the space with ch 36 on 80 MHz 36, 40, 44, 48.
So you have to choose ch 52 on 80 MHz the you take up the space 52, 56, 60, 64.
But you have to see so this space is free from other neighbors, you find the info on the link above.

802.11ac channels can be 20 MHz, 40 MHz, 80 MHz, and 160 MHz wide.
Wide 80MHz and 160MHz channels improve throughput only when full channel bandwidth is free from interfering transmissions.

With 802.11ac comes a new channel naming convention that makes referencing these extra-wide channels easier.
Instead of listing all channel numbers, channels are numbered by their channel number center.

 

[pege63]

Here is a quick reference guide to referencing the 5 GHz Wi-Fi channels.



Wide channel numbering changed with 802.11ac:

• 802.11n Channels (the "old" way)
  • One 20 MHz primary channel, with a channel extension above or below
  • 40 MHz Example: Channel 36, +1
  • 40 MHz Example: Channel 40, -1
  • 40 MHz Example: Channel 36+40
  • This terminology should no longer be used
    
• 802.11ac Channels (the "new" way)
  • Reference the center channel frequency for the entire 40/80/160 MHz wide channel
  • Designate one 20 MHz portion of the wide channel as the Primary 20 MHz
  • 40 MHz Example: Channel 38 with Primary 20 MHz channel 36
  • 80 MHz Example: Channel 155 with Primary 20 MHz channel 149
  • 160 MHz Example: Channel 50 with Primary 20 MHz channel 44

 

[NismoZ]

Question, if my AP is set to AC only on 5GHz, and the others close to me are set to accept N as well, then will my router still interfere with theirs? The "Link Score" for my channel on InSSIDer was 100 with no overlap. I'm guessing that the other networks are too far, or that the above channels 56+60 and 48+52 are not interfering with me?

 

[pege63]

Yes they are to far from you to interfere your ch.

 

[sfx2000]

Here is a quick reference guide to referencing the 5 GHz Wi-Fi channels.

Many still refer to the classic 802.11a scheme as 11n and 11ac can run in 20MHz channels...

 

[pege63]

Many still refer to the classic 802.11a scheme as 11n and 11ac can run in 20MHz channels...

Yes but when you know the new way you also know the old way, it's called progress