WiFi restoration

Tue Apr 28 08:01:01 UTC 2015

With only ten feet away, drop of signal because of distance isn't a serious consideration.

However, what Tim wrote does: If there is another modem operation on the same frequency, it will cause interference (like the old moiré patterns from physics-class)
If they use hidden ssid, it might be a bit harder to detect, but, moving them 4 channels up/down might be helpful, just like moving to the 5GHz band:
- those signals dampens more when they travel, thus causing less interference
- on the 5GHz band, you can use consecutive channels with less problems, on 2.4 you have serious overlap.

Hw

-----Original Message-----
From: users-bounces at lists.fedoraproject.org [mailto:users-bounces at lists.fedoraproject.org] On Behalf Of Tim
Sent: dinsdag 28 april 2015 8:53
To: users at lists.fedoraproject.org
Subject: Re: WiFi restoration

Timothy Murphy wrote:
>> One room in my house is at the boundary of WiFi reception, and WiFi 
>> occasionally fails there.
>> When this happens it is nearly always restored by re-booting.
>> Re-starting NetworkManager never does the trick, however.
>> Is there any other step I could take, short of re-booting?
>> I'm running Fedora-21/KDE.

sean darcy:
> I'm about 10 feet directly across from an n wireless router. And what 
> you describe happens 2-3 times a day. Never on my wife's windows laptop.
> BTW, I don't reboot, just disconnect and reconnect.

You could be in a dead spot for wireless reception - reflections of signals around the room you're in merge and cancel out where your computer's antenna is located.  Try moving position a bit.  I can produce this sort of problem when just a couple of feet from an access point.

You could be using the same WiFi channel as a neighbour, and the clash of each others signals messes up yours.  Try changing your access point's channel.  I've had that problem, too.  Changing channels made a world of difference.  I wish the interface that shows your nearby networks that you use to pick the one you wanted showed what channels were in use, rather than having to use some other debugging tool.  It'd make setting up your wireless LANs a lot easier.

Some access points have an automatic option for them to pick which channel to use.  Mine always automatically picked the worst one to use.
Logically speaking, it'd be scanning nearby networks, and avoiding channels that are in use; or, for where they're all in use, opting to re-use the channel with the weakest signal, presuming that it was the furthest one away.  However, there's a fundamental flaw with this process - the access point can only determine best and worst channels for itself, your clients are in other locations, and which already-in-use channels are stronger and weaker, for them, will probably be a different set of channels than the access point's.

--
tim at localhost ~]$ uname -rsvp

Linux 3.19.4-100.fc20.i686 #1 SMP Mon Apr 13 22:20:50 UTC 2015 i686

All mail to my mailbox is automatically deleted, there is no point trying to privately email me, I will only read messages posted to the public lists.

George Orwell's '1984' was supposed to be a warning against tyranny, not a set of instructions for supposedly democratic governments.

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