How Many Types of Target Coverage Areas Are There on WLAN Networks? What Are Field Strength Requirements in These Areas?
WLAN networks involve the following target coverage areas:
Major coverage areas: places where many users need to connect to the Internet, such as dormitories, libraries, classrooms, hotel lobbies and guest rooms, meeting rooms, offices, and exhibition halls.
Minor coverage areas: places where few users need to connect to the Internet, such as bathrooms, stairways, lifts, corridors, and kitchens.
Special coverage areas: special areas where users allow or prohibit WLAN access.
Depending on WLAN access requirements in the preceding areas, various field strengths must meet the following requirements:
Hotspot field strength: The field strength in major coverage areas ranges from -40 dBm to -65 dBm. A field strength higher than -40 dBm may cause receiver overload, and a field strength lower than -65 dBm may reduce the network connection rate.
Edge field strength: It is determined based on the receiving sensitivity and edge bandwidth. Generally, the edge field strength should be higher than -75 dBm. The network connection rate in minor areas can be lower than that in major areas.
Interference field strength: The co-channel interference strength in an area cannot exceed -80 dBm.
Leakage field strength: The leakage field strength 10 m away from a building cannot exceed -90 dBm.