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Table 1 The adopted IEEE 802.11b parameter.

From: Fairness analysis of throughput and delay in WLAN environments with channel diversities

Parameter Value
Slot-time 20 μs
SIFS 10 μs
DIFS 50 μs
Payload 1023 bytes
PHY header 24 bytes
MAC header 28 bytes
ACK frame 38 bytes
CWmin 32
CWmax 1024
Retry limit 5