Re: WiFi channel separation
Re: WiFi channel separation
- Subject: Re: WiFi channel separation
- From: Kevin <email@hidden>
- Date: Tue, 22 Jul 2014 15:44:43 -0500
On Jul 22, 2014, at 3:15 PM, Carl Hoefs <email@hidden> wrote:
> Interesting point: The 5GHz frequency won't go through walls and such very well. That's a concern. Which raises another question: What constitutes "close proximity"? Even in a large area, if I have two devices operating < 5 channels apart I do see interference, ostensibly due to channel overlap. I guess interference drops off by the standard 1/distance^2 ?
> -Carl
Close proximity to me would be on the order of 10m or less. I don't think different rooms would typically be close proximity.
You shouldn't see much if any noticeable interference on adjacent channels on 5GHz with low powered clients like phones or tablets. 2.4GHz is another story due to the way the channels are named. You can get a max of 3 non-overlapping channels in 2.4GHz in the US, (1,6,11). So for 2.4GHz it's expected that you should see interference on 1 and 5 for instance since those channels overlap at the edge.
I don't think the inverse square law is directly applicable to interference since that doesn't depend directly on the power of the transmission, but the ability of the receiver to decode what it receives. Also, if the devices are in close proximity and similar in terms of power and gain as handheld devices will likely be, any co-channel interference is going to be similar strength to the desired signal, and that will make it very difficult for the receiving device to ignore.
IMO, if you need to go through walls, peer to peer on phones or tablets is a bad way to handle the networking. At that point you really want to be taking advantage of an AP(s) that hopefully has been installed in a suitable location for the environment.
Having said that, a clean 5GHz channel, even the lower powered ones, can probably handle a typical interior drywall with little trouble. More than that is probably going to be an issue.
HTH,
Kevin
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Macnetworkprog mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden