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wifi: Extend design documentation for multiple spectrum PHY interfaces

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Sébastien Deronne
2023-08-31 18:38:23 +02:00
parent d5eb41a2c7
commit e01d56abbc
1 changed files with 7 additions and 2 deletions
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src/wifi/doc/source/wifi-design.rst
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@@ -751,9 +751,14 @@ the other ones are referred to as inactive RF interfaces and might be disconnect
Multiple RF interfaces concept
If the ``SpectrumWifiPhy::TrackSignalsFromInactiveInterfaces`` attribute is set to true,
If the ``SpectrumWifiPhy::TrackSignalsFromInactiveInterfaces`` attribute is set to true (default),
inactive RF interfaces are connected to their respective spectrum channels and the ``SpectrumWifiPhy``
forwards received signals from these inactive RF interfaces to the ``InterferenceHelper`` without processing them.
also receive signals from these inactive RF interfaces when they belong to a configured portion
of the frequency range covered by the interface.
The portion of the spectrum being monitored by an inactive interface is specified by a center frequency
and a channel width, and is seamlessly set to equivalent of the operating channel of the spectrum PHY
that is actively using that frequency range. The ``SpectrumWifiPhy``forwards these received signals
from inactive interfaces to the ``InterferenceHelper`` without further processing them.
The benefit of the latter is that more accurate PHY-CCA.indication can be generated upon channel switching
if one or more signals started to be transmitted on the new channel before the switch occurs,
which would be ignored otherwise. This is illustrated in Figure :ref:`fig-cca-channel-switching-multiple-interfaces`, where the parts in red are only generated when ``SpectrumWifiPhy::TrackSignalsFromInactiveInterfaces`` is set to true.