ND SatCom SKYWAN IDU 1070, Manual

Page: 41 / 154

2010-10-26 Network Design and Engineering Guide 37
General Carrier Design
Essential SkyWAN
®
Satellite Link Layer Features
Scenario 1
Both IDU1 and IDU2 are configured for stream mode Normal . The traffic mix (see figure 2-20)
consists of:
- A non real-time IP based PC application with a bidirectional bandwidth requirement of 128
kbps between these two stations.
- Additionally 6 parallel voice calls served by Sky WAN
®
FAD real-time service should be ac-
tive between the stations.
Figure 2-20 Throughput Scenario 1
Effect
Due to the defined guarantee for both stations, the 6 dynamic slots needed for the PC applica-
tion will always be available, irrespective of the general congestion state of the network. For
the voice calls each station would need 3 streaming slots.
As long as there are enough free slots available in the common streaming pool, these calls can
be set up. However, there is no guarantee for the calls: if other stations have already used a
part of the streaming pool, some of the voice calls may be blocked.