This is called "adjacent channel interference", interference from surrounding channels. They do not use channels 1, 6, or 11, and they therefore interfere with multiple channels simultaneously. Interference on other channelsĪnother challenge comes from the networks Mr Orange, Langestolen, WhiteMouse, SAAB and Telenor2105sot. The Wi-Fi standard addresses this, making the networks have to try to adapt to each other, almost like driving in a queue. This is what is called "co-channel interference" – networks on the same channels that interfere with each other. Most networks here are clustered around channels 1, 6, and 11. Ideally, this would be the only wireless network in the area, but this is of course quite a far-fetched idea these days. In this example we see that there are many wireless networks on the 2.4 GHz frequency band.ĪirTies_Air4920_EI78 is our network in this example. The picture below shows a scan done in a regular neighborhood with the program inSSIDer. More about wireless signal strength can be read here: Wi-Fi Signal Strength: What Is a Good Signal And How Do You Measure It? Example: How to Assess Interference and Select a Channel But if you have multiple access points, they can be placed to cover different areas. In practice, this will be virtually impossible to achieve everywhere in an apartment or a house if you only have a single access point (usually the router). If there are other wireless networks on the same channel, try selecting a channel where the other wireless network's signal is 20 dBm weaker than your wireless signal is. You should also look at the signal strength of each network. See also: Five questions to ask when your phone does not find Wi-Fi.
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