Types of target coverage areas on WLANs

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WLANs can provide wireless coverage in the following target areas:
- Major coverage areas: places where many users need to access 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 access the Internet, such as washrooms, stairways, lifts, corridors, and kitchens
- Special coverage areas: places where WLAN access of users is allowed or prohibited

Other related questions:
How many types of target coverage areas are there on WLANs? 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.

Coverage distance of the WLAN
In an open environment, the coverage area of an AP is 100 m. When there are interference sources, such as microwave ovens, electromagnetic ovens, or other APs, near the AP, the coverage area decreases and the signal quality of the AP degrades.

Field strength requirements in different WLAN coverage areas
Depending on signal strength requirements on a WLAN, the field strength requirements are as follows: - Hotspot field strength: The field strength in major coverage areas ranges from �?0 dBm to �?5 dBm. Field strength higher than �?5 dBm may cause receive overload, and field strength lower than�?0 dBm may reduce the network connection rate. - Edge field strength: It is determined based on the receive sensitivity and edge bandwidth. Generally, the edge field strength is higher than �?5 dBm. The Internet access requirements can be met even if the network connection rate is reduced. - Interference field strength: The co-channel interference strength in the same area should not exceed �?0 dBm. - Leakage field strength: The leakage field strength 10 m away from a building should not exceed �?0 dBm.

What is the WLAN coverage range
Generally, the WLAN coverage range various according to the environment. When no external antenna is used, the WLAN coverage range is about 250 meters. In the semi-open space or the space with a compartment, the WLAN coverage range is about 35 to 50 meters. When external antennas are used, the WLAN coverage range increases with the antenna gain and is determined according to customer requirements. If an outdoor antenna and amplifier are used, the WLAN coverage range can reach up to several tens of kilometers.

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