Hybrid Control of Contention Window and Frame Aggregation for Performance Enhancement in Multirate WLANs

Table 2

Performance validation of the hybrid mechanism as a solution to the problem of performance anomaly (Scenario 1).

Criteria	DCF	Hybrid
Per-STA throughput (Mb/s)
STA1 ( = 6 Mb/s)	2.142	1.267
STA2 ( = 12 Mb/s)	2.134	2.531
STA3 ( = 24 Mb/s)	2.141	5.047
STA4 ( = 48 Mb/s)	2.148	10.713
Aggregate throughput (Mb/s)	8.566	19.558
Utilization	0.801	0.919
Fairness index	0.726	0.997