26
Calculation equation of throughput from main unit to Pods
Calculate the throughput corresponding to the green arrow in “Network bandwidth diagram for
active learning” (page 23).
Required bandwidth = Throughput of content display Pod sharing from main unit to a Pod
(T
pod_content
)
× Number of Pods (N
pod
)……(
Eqn. C
)
= 6 Mbps × 1
= 6 Mbps
From the above calculation equation, the required network bandwidth that must be maintained
between Pod and layer 2 switch is given below.
Required bandwidth (T
pod
) = Total throughput from wireless LAN access point to Pod (
Eqn. A
)
× Number of Pods
+ Total throughput from Pods to main unit (
Eqn. B
)
+ Total throughput from main unit to Pods (
Eqn. C
)
= 7 Mbps + 6 Mbps + 6 Mbps
= 19 Mbps
Adding the margin of 30%, 19 Mbps × 1.3 = 24.7 Mbps
Throughput of content display Pod
sharing from a Pod to the main unit
(T
pod_content
)
Number of displays connected to the main
unit or number of Pods, whichever is smaller
(N
disp
or N
pod
)
* N
disp
= 0 if user devices are mirroring by
direct connection to the main unit.
×
+
Throughput of thumbnail display
Pod sharing from a Pod to the main
unit
(T
pod_thumbnail
)
Number of Pods – Number of displays
connected to the main unit
(N
pod
– N
disp
)
×
Required bandwidth
=
=
T
pod_content
× N
disp
+ T
pod_thumbnail
× (N
pod
– N
disp
) ……(
Eqn. B
)
= 6 Mbps × 1 + 1 Mbps × (1 – 1)
= 6 Mbps
