Proper site surveying and maintenance are crucial for wireless networks, and especially so for networks with heavy traffic, such as Wi-Fi hotspots at public venues. The same is true when speed is vital, as when streaming video or voice over Wi-Fi.
Interference, congestion, poor design, improper configuration, and lack of maintenance are just a few factors that can negatively affect Wi-Fi performance. Fortunately, there are several techniques you can use to combat these issues.
But first a note about Wi-Fi airtime, which is the amount of time a wireless device or access point (AP) is transmitting. The slower the transmission speed, the more airtime a device takes up and the less time available for other devices. This is important because not all devices can transmit at the same time on a given channel; wireless clients and APs have to share the airwaves.