 Suppose the nodes
A and
E hear a
busy channel and
backoff:
 Suppose:
 A and
E pick
2 different integers that
has the minimum difference possible
(= 1)

Say:
 Then after
x × τ
,
the node A starts
to transmit:
Notice that:
 E
can not hear
A's transmission
yet !!!
 E will
start trying to
transmit at
time (x+1) ×
τ

 It take τ sec for the
signal from
A to
reach
node E
So at time: (x+1) ×
τ:
The transmission of
A arrives
at E in
the nick of time !!!
When E
starts its
transmission attempt,
E will
hears
A's transmission
just in the nick of time !!!
