This is using D-Link DIR-655 wireless router, for a ADSL Internet access. All the equipments are deployed in 2nd floor. Currently, attempt to use wireless on 1st and 3rd floors are rather not possible as the signal is rather weak (probably due to concrete wall). Running cable is not possible between floors. I'm thinking getting 2 wireless APs to boost up the signal for 1st and 3rdfloors. Do you have any APs in mind? Or any alternative way?