Internet connectivity of all wireless connections is dropped simultaneously, with "yellow star" in the system tray icon of all machines but wired connections continue working fine without any problems whatsoever.
Then wireless connects automatically within a minute or so.
The router I'm using is: Linksys WRT120N OS on all laptops(3-4) is Win7 and with 3 handhelds (ablackberry and 2 androids)
I have already tried switching the channel to a less crowded one, increasing lease-time to one day and adding DHCP reservations and now it seems a dead-end.
Any help will be greatly appreciated.