Figure 7a demonstrates the physical collision probability without retries as a function of N s for comparisons between prediction and simulation data from 802.11, 802.11e and 802.11aa, where a common value of initial contention window (W = 32) was adopted and only a single saturated CBR flow was sent, via AC_BK in the case of the latter two and thus they share the same results.
The algorithm proposed in [9] automatically adjusts the initial contention window to a near optimal point according to the traffic activity, thus avoiding bandwidth wastage due to improper contention window setting.
A review of evidence gathered by American intelligence agencies, which has not been made public, contradicts the initial contention by the United States about a 1983 event.
These do not in general perform reversed beam-path measurements, and so our initial contention that quotients can be measured in such a way that errors cancel does not hold.
— Dwyane Wade (@DwyaneWade) 12 Apr 12 His initial contention that players should be paid came in comments after a practice on Wednesday, after Ray Allen of the Celtics made the same point in an interview the night before.
Brown's initial contention that there would be no apportioning of blame was also later contradicted, this time by the foreign secretary, David Miliband, although Miliband emphasised that criminal or civil liability would not be established.
W0 The initial contention window.
In the figure, as the initial contention window size increases, the collision probability decreases.
The collision probability performance is also demonstrated for different values of initial contention window size, CW min = 16, CW min = 24, and CW min = 32.
When the number of active stations is large, the DAC-based scheme increases the initial contention window size and inter-frame space for best-effort data traffic.
Through simulations, the energy consumption and read-out delays incurred by the five different back-off algorithms and their back-off coefficients and Initial Contention Windows have been determined.
