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802.11 Protocol Architecture
FIGURE 2.18
Duration Field Value & CF Parameter Set
CFPDurRemaining indicates the estimated time, in Time Units (TUs),
remaining in the present CFP, and is set to zero in CFP Parameter
elements of beacons transmitted during the contention period. TUs are
measured in Kilomicroseconds (Kµs). The CFPDurRemaining value is
used by all stations to update their NAVs during CFPs. The CF
Parameter Set structure is shown in figure 2.19 below.
FIGURE 2.19
CF Parameter Set Structure
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