Utilization for CSMA/ CD
CSMA/ CD
- where a = propagation delay = 2 * _
- A = prob of channel acquisition, no collision
- A = (1 - 1/ N) ** (N - 1)
w = mean length of contention interval
E{w} =_ i*Prob[i slots collide, 1 doesnít]
E{w} = _ i *A (1 - A) ** i = (1-A) / A
=> U = 1/ (1 + 2a(1-A)/ A)
- U = 1/ (1 + 3.44a) for N => large