Suppose a shared ethernet link L, in which for nodes T1-T4 and a router R are connected:
--------------------------- R | | | | T1 T2 T3 T4
L has bit-rate
C=100 Mbps, and propagation delay is
PROP = 10 msec.
Every node transmits packet with probability
Pb = 10%. The mean packet length is
Note that ethernet uses CSMA/CA
What is the average time for a node to transmit on the shared medium?
What I've tried:
We know that on carrier sense
WAIT_BEFORE_RETRANSMITTING = 5*PROP = 50 ms.
We also know
transmission_delay = P(length) / C = 8 ms in our case
So, based on those results, I suppose that the average time for a node to transmit on the shared medium is
50 + 8 = 58 ms