ND SatCom SKYWAN IDU 7000, Manual

Page: 47 / 154

2010-10-26 Network Design and Engineering Guide 43
General Carrier Design
Network Traffic Estimation
Figure 2-25 Traffic Estimation Scenario Fame RelayTraffic
The traffic patterns show a network which basically constitutes a double-hub star network.
Keep in mind that the real network topology might still be partially or fully meshed. For the traffic
estimation in most cases it is enough to consider the most important traffic flows. If traffic flows
between medium and small sites for example account for only a small fraction of the network
traffic, they can be neglected in the estimation of the network traffic.
The next step is to summarize the traffic requirements to derive the user traffic capacity for
each station of a specific type. To sum up the capacity needed by one station on its receive
carrier (Home Channel) we consider all traffic flows to a specific station in
receive direction .
Summarize Example Traffic
The non real-time user traffic (IP LAN traffic) requirement for one head office is 64 + 32 + 2*5
+ 21*1 = 127 [kbps]. For one small station 20 kbps traffic is assumed. The total requirement
for all head offices is 2*127 = 254 kbps. For all small sites it is 42*20 = 840 kbps.