2.4Ghz / 5Ghz - Will it work?

Hello Guys,

First time posting here so I'm not sure if this is the correct place.

I'm starting to design a 5GHz Wireless Networks that will work together with an 2.4Ghz during the tests and transition phase. In order to keep the same configuration into the clients, we are choosing the same SSID, so we do not have to go one be one and change the machine configuration.

My question is, If there are two WLAN, one with 2.4Ghz and another with 5Ghz with the same SSID, how the client will choose to which frequency to connect?! To the 2.4Ghz (the default frequency for most APs) or will it try to connect to the 5Ghz (Faster and Less Interference)?! Is there any documents (RFCs) about it? Anyway already had to do this kind of transition and have any shortcuts?! My clients are using Windows 7 (almost everybody) and we are doing this transition because we have to much noise in the 2.4 frequency.

I also checked and the computers does have Wireless card that works with 5Ghz frequency.

Thank you

Generally the parameters used by a PC to select which access point it will connect to depends on variables in the software being used to ascertain the one that will allow the higher data rate throughput. That can be based on signal strength, and how many slots are available for data delivery. Even CDMA uses time slots (pids, sifs and difs) to allocate data transfers between machines and the access point(s). The receiver selectivity figures come into play as well in determining if the machine will be bale to connect to lower signal strengths coming off of access points farther away that are using the same channel as well. For instance a machine may well forgo a stronger AP connection for a weaker signal strength AP if the weaker AP has more bandwidth available for data transfer.