Adaptive Backoff Algorithm for Contention Window for Dense IEEE 802.11 WLANs

Table 1

Comparison of DCF and ABA-CW algorithms for CW = 16, data rate = 54 Mbps.

Number of stations	5	10	20	30	40	50	60	70	80	90	95
BEB throughput	39.78	37.92	35.37	33.62	32.30	31.24	30.30	29.55	28.82	28.12	27.82
ABA-CW throughput	39.00	38.46	38.22	38.09	38.08	37.95	37.97	37.90	37.90	37.87	37.87
BEB collision rate	0.27	0.38	0.47	0.53	0.57	0.60	0.62	0.64	0.66	0.67	0.68
ABA-CW collision rate	0.18	0.20	0.21	0.22	0.22	0.22	0.23	0.23	0.23	0.24	0.24
BEB utilization	0.69	0.66	0.61	0.58	0.56	0.54	0.53	0.51	0.50	0.49	0.48
ABA-CW utilization	0.68	0.67	0.66	0.66	0.66	0.66	0.66	0.66	0.66	0.66	0.66
BEB fairness	0.99	0.97	0.94	0.92	0.89	0.88	0.86	0.85	0.83	0.82	0.82
ABA-CW fairness	0.99	0.99	0.99	0.99	0.99	0.99	0.99	0.99	0.99	0.99	0.99