 |
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|
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| – |
station
ready to send starts sensing the medium (Carrier Sense
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based
on CCA, Clear Channel Assessment)
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| – |
if
the medium is free for the duration of an Inter-Frame Space
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(IFS),
the station can start sending (IFS depends on service type)
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| – |
if
the medium is busy, the station has to wait for a free IFS, then
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the
station must additionally wait a random back-off time (collision
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avoidance,
multiple of slot-time)
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| – |
if
another station occupies the medium during the back-off time of
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the
station, the back-off timer stops (fairness)
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