Because of the 802.11 medium access protocol, an interfering RF signal of sufficient amplitude and frequency can appear as a bogus 802.11 station transmitting a packet. RF interference involves the presence of unwanted, interfering RF signals that disrupt normal wireless operations. The actual 802.11 medium access protocol is somewhat more complex, but this gives you enough of a starting basis. If another station happens to be sending a packet, the other stations will wait until the medium is free. Each 802.11 station only transmits packets when there is no other station transmitting. As a result, it’s important that you’re fully aware of RF interference impacts and avoidance techniques.Īs a basis for understanding the problems associated with RF interference in wireless LANs, let’s quickly review how 802.11 stations (client radios and access points) access the wireless (air) medium. The perils of interfering signals from external RF sources are often the culprit. Many companies have gotten by without any troubles, but some have installations that don’t operate nearly as well as planned. Radio frequency (RF) interference can lead to disastrous problems on wireless LAN deployments.
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June 2023
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