PP Presentation
- Assume that the prob. of a bit error is independent and that it is E. Assume that the size of the ACK is the same as the size of the header A=H.
- Then channel utilization is:
(8)
D
1
U
=
H
+
D
´
(
1
-
E
)
H
+
D
(
1
-
E
)
H
´
1
+
CT
/
(
H
+
D
)
= prob of no errors for H=A bits in a row
= prob of no errors for F=D+H bits in a row
- To maximize the channel utilization, we need to
be given: header size (H), error rate (E), raw
bandwidth (C) and timeout interval (T).