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Wireless LAN Design Guide for High Density
Client Environments in Higher Education
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times together, it shows the percentage of time a Wi-Fi station cannot access the channel. As mentioned previously, Wi-Fi is
contention based and while signals are present above the CCA threshold no station can access the channel. 100 percent RF
duty cycle is bad. In this case, it is attributable to inefficient spectrum use.
From the physical layer, these spectrum views, Figures 18-19, were taken using Cisco Spectrum expert and CleanAir from a
monitoring AP located in the center of each room.
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