Some knowledge of wireless APs correctly deployed and used
Compared with our common home wireless routers, wireless APs need to consider many factors when using or installing and deploying wireless APs, such as wireless AP coverage, usage, wall penetration, and location selection. If you do not pay attention, it may cause the wireless AP to be unstable or have no signal. Professional wireless AP and scheme provider Feng Runda Xiaobian to everyone to sum up.
1, wireless AP coverage area: Indoor maximum allowable coverage distance is 35 to 100 meters, outdoor allowable maximum distance 100 to 400 meters, in general, to determine the minimum coverage of its coverage.
2, wireless AP coverage: This point can be seen from the loss of signals from environmental construction materials. In general, solid walls or load-bearing walls have the greatest impact on the signal, so do not use walls when deploying wireless APs.
The 2.4G wireless signal attenuation values ​​are listed as follows: cement wall (15~25cm): attenuation of 10~12dB, wooden wall (5~10cm): attenuation of 5~6dB, glass window (3~5cm): attenuation of 5~7dB.
have to be aware of is:
When the wireless AP and the terminal (mobile phone) are separated by a concrete wall, the wireless AP's transmittable coverage distance is about < 5m effective distance.
When the wireless AP and the terminal (mobile phone) are separated by a wood wall, the transmission distance of the wireless AP is about <15 m effective distance.
When the wireless AP and the terminal are separated by a glass wall, the transmission distance of the wireless AP is about <15 meters effective distance.
3, the number of wireless APs is determined:
For general open spaces with an area of ​​less than 150 square meters, such as public rest areas, small bars, cafes, conference rooms, western restaurants, etc., where the number of users is expected to be no more than 30, one or two wireless APs are placed at each location. Can meet the demand.
When the space is large, multiple wireless APs will be installed to meet the coverage requirements. When the capacity requirement is large, that is, the number of users in the coverage area of ​​the AP is too large, multiple wireless APs need to be placed in the same space to increase capacity (in fact, Access density).
4, wireless AP installation location selection:
Install an AP in a single room and place the AP in a central location as much as possible, preferably on the ceiling. If you install two APs, you can place them in two opposite corners of space.
5, wireless AP frequency planning:
In theory, the isolation of adjacent frequency points is required to be >= 35db. According to the empirical value, when the adjacent AP sets the same frequency, the interval is required to be more than 25 meters; when the adjacent AP sets the adjacent frequency, the AP needs to be more than 16 meters apart; when the AP sets the frequency, the requirement is More than 12 meters apart.
To maintain a better quality WLAN, consider the number of users in the coverage area. The number of online end users for a single AP should not exceed 30.
6, wireless AP roaming:
AP signal coverage areas should overlap each other. All wireless APs must use the same SSID and use the IP address of the same network segment. The adjacent same channels cannot overlap each other.
7, wireless AP power control:
By adjusting the output power of the AP, the number of users in the coverage area can be controlled to ensure network quality.
Generally, the wireless AP products are delivered with uniform power. When the user needs to change the power, the corresponding software can be downloaded to adjust the output power (some wireless APs do not support power adjustment). In the initial stage of the current WLAN construction, the coverage requirements are mainly met, and AP power is less controlled.
8, pay attention to outside interference: such as microwave ovens, anti-theft devices (shopping door inspection), other high-power electronic devices, so the wireless AP should be away from the interference source 1-2 meters.
to sum up
The bearing wall of the reinforced concrete structure has a strong obstruction to the wireless signal, so the solution to the best signal coverage for the “multiple†residential and villa home environment is to configure wireless APs for each floor. In practical applications, the coverage of indoor APs may only reach up to 30 meters.
The transmission rate of wireless networks is lower than that of wired networks. In general, the actual usage rate of wireless APs is only about 40% of the nominal value. If it is set to 64/128-bit Web encryption, the transmission rate will further decrease, and therefore, the use rate is more Pay attention to interference issues and keep away from microwave ovens, wireless phones, and Bluetooth devices.
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