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In WiFi the client devices decide which access point they want to associate with and when to switch to next. Unilateral transmit power increase will only work in one direction. So a good antenna and good location will improve the connection in both directions. The antenna gain and any attenuation factors work symmetrically in both directions. It doesn’t matter if the AP has a better antenna or is located higher up. The bidirectional connection is symmetrical. Have you ever been unable to connect – even though you appear to have good signal? This is the reason.

It does no good if the client can receive the AP if the AP can’t receive the client. However, WiFi connection is always bidirectional. To minimize power consumption their radios typically max at 15mW (12dBm), while access points max at 100mW (20dBm) on 2.4GHz and 200mW (23dBm) on 5GHz. Mobile devices like phones and tablets have very limited batteries.

All APs on the same channel will give other APs equal access to the spectrum. If your AP can receive other APs then it will share the air time with them by taking turns.

In a congested environment it doesn’t matter if your access point is stronger than the neighbor’s. It even makes sense to start with minimum power and increase it until the necessary area is covered.

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