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From: Yousaf on 16 Dec 2009 09:00

> No.  Nobody can solve interference problems if you have ten
> access points spewing RF everywhere.  Buy some CAT5 cable
> and forget about wireless.- Hide quoted text -

I am moving to a new house and thinking about installing ethernet
points in different locations. I'll have to see how many access points
there are first.
From: Aaron Leonard on 16 Dec 2009 11:24
~ I have an Edimax EW-7206APg with the following settings:
~
~ Broadcast ESSID: Enabled
~ MAC Filtering: Disabled
~ DHCP Server
~ Running mode: AP
~ Security: WEP
~
~ I've had no problems with this since I bought it two years ago. But
~ recently, the connection started to drop intermittently. The first
~ time it happened, I noticed that another Access Point in my area was
~ broadcasting on the same channel. So I changed mine and it started to
~ work again. Now the situation is that there are nearly 10 Access
~ Points around my house. Therefore, whatever channel number I pick,
~ there is always a conflict with another Access Point.
~
~ If I go close to my Access Point with my laptop, it works fine. But as
~ soon as I go a bit further away (as far as five metres) the connection
~ drops. I have tested it on both Vista and Linux Fedora with the same
~ result. I have also tested it without any encryption and with
~ encryptions other than WEP with the same result.
~
~ Could anyone help me troubleshoot this please?
~
~ Thanks.

Option 1: sticking with 2.4GHz

1. Find out what all APs are in your vicinity, what channels they
are using, what RSSI you're receiving their signals at, and (harder)
what their duty cycles are.

2. Pick the least bad 2.4GHz channel accordingly; set your AP to use
it. (Bear in mind that, in 802.11b/g, an AP centered on a given
channel will interfere with two channels on either side of it, e.g.
an AP on channel 4 will interfere with 2 thru 6.)

Option 2: get a 5GHz AP. This will offer up many more non-overlapping
channels than 2.4 gives you, plus which there is usually much less
interference in 5GHz in general. The downside is that 5GHz propagates
significantly less well than does 2.4GHz.

At the same time, investigate getting a better performing AP / client.
This may involve hardware replacement or simply a software update.
For example, right now there are 14 2.4GHz APs audible at my desk,
yet my 2.4 GHz wireless connection is working with no difficulty.

Hth,

Aaron
From: Yousaf on 16 Dec 2009 12:02
On 16 Dec, 16:24, Aaron Leonard <Aa...(a)Cisco.COM> wrote:

> Option 1: sticking with 2.4GHz
>
> 1. Find out what all APs are in your vicinity, what channels they
> are using, what RSSI you're receiving their signals at, and (harder)
> what their duty cycles are.
>
> 2. Pick the least bad 2.4GHz channel accordingly; set your AP to use
> it.  (Bear in mind that, in 802.11b/g, an AP centered on a given
> channel will interfere with two channels on either side of it, e.g.
> an AP on channel 4 will interfere with 2 thru 6.)
>
> Option 2: get a 5GHz AP.  This will offer up many more non-overlapping
> channels than 2.4 gives you, plus which there is usually much less
> interference in 5GHz in general.  The downside is that 5GHz propagates
> significantly less well than does 2.4GHz.
>
> At the same time, investigate getting a better performing AP / client.
> This may involve hardware replacement or simply a software update.
> For example, right now there are 14 2.4GHz APs audible at my desk,
> yet my 2.4 GHz wireless connection is working with no difficulty.
>
> Hth,
>
> Aaron

Great! Thanks. I'll look at both options.
From: DevilsPGD on 16 Dec 2009 14:53
In message
<f1492775-be4d-44cb-8612-32dbbe10f653(a)t42g2000vba.googlegroups.com>
Yousaf <yousaf.hassan(a)gmail.com> was claimed to have wrote:

>
>> Have you set the channel and SSID as the default on the various Pc's
>> connecting ?
>
>
>I have set the SSID on vista and fedora but neither gives me the
>option to set the channel ID. I'll look into this. Thanks.

You shouldn't ever need to set a channel ID on the client side, this is
something that is only set on the AP side.

The only exception is adhoc networks where there isn't an AP in play.
From: me here on 16 Dec 2009 18:20
Yousaf wrote:

>
> > Have you set the channel and SSID as the default on the various Pc's
> > connecting ?
>
>
> I have set the SSID on vista and fedora but neither gives me the
> option to set the channel ID. I'll look into this. Thanks.

Are your PCs attempting to connect to the other access point SSID as
you move away from your own access points?

or does your access point signal simply reduce the further away you are?

If the PC's are attempting to connect to the other points then you
haven't set your access point SSID as the default on the client PCs.

Don't use Windows Zero config.

Also some access points have a setting which applies extra filtering to
counter interference - check the mode - also try "B" to see if the
problem still applies.

If the signal strength is just falling away as you move away then maybe
the access point is not transmitting very strongly and faulty. What is
the indicated strength - less than 54G?

As previously mentioned, a corner reflector on your access point can
help shield out interference, but much better is plenty of foil
sheeting between you and the interference point - provided it's a wall
we are talking about.

Rob
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