NetworkManager connection priority - same ssid ?

[mike cloaked <mike cloaked gmail com>]

I have a home LAN where there are two wireless access points.  I run
Fedora F14 and use NetworkManager to connect. The access points both
use the *same* ssid and encryption to try to make a seamless wifi
network around the house.

How does NetworkManager decide on which of the two APs to connect to?
What I would like is that in this instance the connection is made to
that AP that is giving the strongest signal at the laptop but it does
not always do this.

I can't see a way of telling NM how to prioritise the strongest signal
at any time, but I don't know if this is already the logic that is
built in to NM or not - it does not appear that the connection
decision is based on signal strength but on perhaps other or
additional criteria?

Thanks

-- 
mike c