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"Hidden Node" Provisions
Problem – Stations contending for the medium do not Hear each other
Solution – Optional use of the Duration field in RTS and CTS frames with AP
STA "B"
cannot receive
data from
STA "A"
STA "B"
DIFS
RTS
STA A
AP
STA "B" cannot detect carrier from STA "A"
STA B
,
CTS-Range
Access Point
Data
CTS
Time period to defer access
is based on duration in CTS
STA"A"
Ack
Next MPDU
Back off after defer
RTS-Range
© Siemens, 2002
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