Goal

The goal of this document is to help you optimize your wireless network to avoid the most common Wi-Fi issues, such as devices falling off the network, roaming issues, and video calling issues. Radio power recommended levels have changed over time because the data needs of devices have changed over time.

Background

Since wireless data needs have evolved, so must our wireless deployments. We used to worry only about providing an adequate signal to our devices. Now, we also need to ensure that every device can transmit data at the proper rate to satisfy the more demanding applications people use every day. This means using more APs, closer together, with lower radio power.

Methodology

During testing, segregate the bands by creating unique 2.4 and 5 GHz SSIDs so you know which band you’re connected to. Optimize the 5 GHz band first, then focus on 2.4 GHz. Test each band individually to ensure you have complete coverage.

Why are we focusing on the 5GHz band first?

The 5 GHz band allows for faster data transfer rates and more channel selection options to allow for less interference. If a device is 5 GHz capable, you want it connected to the 5 GHz band. The below chart illustrates why..

	2.4 GHz	5 Ghz
Operating Distance	Travels farther	Less Range
Interference	Very high	Low
Barriers	Less signal loss	More signal loss