Image Processing Reference
In-Depth Information
100 m
100 m
64-byte
packet
Switched
100 Mbps
ethernet
Propagation
0.5
Node A
Node B
Transmission
5.12
Node time
330
Switch latency
10
Network
Transmission
5.12
Propagation
0.5
FIGURE .
Illustration of node delay contribution to total delay in a typical two-node Ethernet network
(pictured above). Time given in microseconds.
a mobile phone or a wire mesh used to strengthen a cement wall can lead to intermittent and difficult
to diagnose NCS performance issues. Knowing the impact of these issues in advance helps opti-
mize decisions as well as reduce discovery times for NCS performance problems detected during
operation.
23.4.3 Analytical Perspective
While the theoretical and experimental analysis provides an excellent foundation for NCS evalua-
tion, it does not provide a capability to combine the results for differential analysis with respect to
the specifics of the application environment. A final analytical step is thus needed where the fac-
torscanbeweighedandcombinedtoyieldasingleanswerwithrespecttothebestdecision.he
weighted analysis can be achieved through a simple normalized weighting of factors of concern that
are determined through either theoretical or experimental means []. [].The weighting equation takes
the form of
W
H
W
E
WCost
total
=
Cost
H
+
Cost
E
(
W
H
+
W
E
+
W
P
)
(
W
H
+
W
E
+
W
P
)
W
P
+
Cost
P
(.)
(
W
H
+
W
E
+
W
P
)
where
Cost
H
,
Cost
E
,and
Cost
P
are the costs associated with hardware, engineering, and maintenance
and performance
W
H
,
W
E
,and
W
P
are the weights assigned, respectively, to these costs
Each cost factor is made up of a number of contributors, which are themselves weighted in a
normalized manner as in
W
n
W
n
W
n
n
Cost
H
=
W
i
⋅
Cost
H
+
W
i
⋅
Cost
H
+⋯+
W
i
⋅
Cost
H
n
(.)
i
i
i
=
=
=
