The solution is to increase the channel bandwidth allotted to 40 MHz.
The best method to accomplish this would be to increase the bandwidth allotted to each channel to 40 MHz. By doing this, it will be ensured that the capacity is adequate. This is merely due to the fact that a channel's bandwidth indicates how much data can flow through it at any given moment; the larger the channel, the more data may flow through it simultaneously. Therefore, doubling this bandwidth channel size would be more than enough for the network to handle all of the data provided 20 MHz is sufficient for the network.
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