In article <281120121830466586%ot...@bogus.address.com
Change your 2.4GHz channel. As others have mentioned 1, 6 and 11
do not overlap with any other channel. Basically a channel is a
bell curve that is strongest in the middle and fans out 2 channels
below and above your channel, which is why 1, 6 and 11 do not
iStumble will tell you which neighbor WiFi channels are strongest.
Make sure you choose a channel that has the least overlap with
your strongest neighbor's signals, and if you have to overlap, try
to make it the weakest signals.
Putting your WiFi base station in the center of the house and
closest to the places where you use your devices the most is the
best idea (and maybe further from your strongest neighbors).
If you cannot run ethernet from the broadband modem (the best
suggestion), then consider using Ethernet PowerLine Adaptors
(Google "ethernet power line adaptors" and you will find lots of
hits). A pair of these adaptors will allow you to place your
Airport Extreme base station anywhere in your house.
Since you say your neighbors all have their network "Protected"
you do not need to worry about your devices trying to connect with
them, as your devices do not have the passwords, so they will be
ignored. And since your devices do have the password to your WiFi
network, they will default to using your network.
The iPhone 4s and older are 2.4GHz WiFi devices. I think the
iPhone 5 might have 5GHz WiFi support, but I'm not positive.
In general 5GHz 802.11n WiFi does not see much interference. 1st
it actually has a lower range, so it is more difficult for
neighbors to overlap and interfere, I think the 5GHz channel
layout does not have the same 5 channel overlap, so each channel
does not interfere with the adjacent channel, and at the moment,
there are fewer 5GHz 802.11n base stations (this will change and
you will find more overlap as time goes on).
If you are going to consider an Airport Express as a range
extender, it is fairly easy to setup an extended network between 2
Apple WiFi base stations over WiFi (no wires needed). Airport
Utility -> Airport WiFi base station -> Wireless -> Network Mode
-> Extend a wireless network is where you start.
The alternative is to connect the 2 WiFi base stations via
ethernet. If you cannot run an ethernet cable, then again
consider Ethernet PowerLine Adaptors. It would be best to NOT use
powerline adaptors for BOTH moving the AEBS to a central location
AND to connect a 2nd AXBS. Rather leave the AEBS directly
connected to the broadband modem, and use powerline adaptors to
connect the AEBS to the AXBS. You then configure the AXBS for
"Bridge Mode" so it disables routing on the 2nd device (you only
want 1 router in your home; the 2nd device should just extend the
existing network not create its own; Airport Utility -> AXBS ->
Network -> Router Mode -> Off (Bridge Mode). Now assign the AXBS
its a separate 2.4GHz channel at least 5 channels away from your
AEBS (you do not want to interfere with yourself). And give the
AXBS the same "Wireless Network Name" and Security password as the
AEBS. This will setup a "Roaming Network" that allows you to move
between AEBS and AXBS dynamically switching to the strongest
signal without loosing any internet connections you have running
(such as Skype, Facetime, Screen Sharing, etc...).