After 4 years of hard working, IEEE approved the standard 802.11r, which handles a fast BSS transition. What this means? A big wireless network, is built with a lot of access points, this means that if you would like to cover a big city, you might have thousands of access points spreaded around. This brought a new challenge to 802.11, with the introduction of applications such as voip, the transition between access points needs a very small delay, you would be amazing how annoying is to have a delay bigger then 300ms, can turn your call into something unacceptable if…