But how do you know what is harming your access point coverage radius?
Let’s start with understanding what an access point coverage radius looks like and why it’s essential to optimize.
Access point coverage radius is the area within which devices can connect to an access point and receive a strong and reliable Wi-Fi signal. Several factors influence this coverage radius, including signal strength, noise, physical obstructions, interference from other devices, and network capacity.
Signal strength plays a significant role in determining the coverage radius. It is the first thing to look at when understanding how much coverage an access point, or AP, is actually providing. It is also dependent on the configured transmit power levels. Physical obstructions can reduce the coverage radius, while interference can degrade the quality of the connection.
Generally, the higher the transmit power, the larger the coverage area. If it is a free space or open area, an AP at a low to medium transmit power threshold still may be able to cover a wide area. You start running into coverage issues when facing attenuation from physical obstructions. There may be generally good coverage but problematic connection due to interference from other devices, including radio frequency interferers (RFIs) or co-channel interference (CCI) from neighboring APs.
These are common examples of RFIs:
- Wireless headsets
- Baby monitors
- Motion sensors
- Signal generators
- Game controllers
- Drones
- Microwave ovens
- Audio transmitters
- Bluetooth
- Wi-Fi jammers
- Radars
- Microphones
- Wireless cameras
Below is a heat map that shows the location of each access point and the strength of coverage in the respective areas, as represented by the color guide.