ND SatCom SKYWAN IDU 7000, Руководство пользователя

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2010-10-26 Network Design and Engineering Guide 19
General Carrier Design
Introduction
2 GENERAL CARRIER DESIGN
The general principle of the carrier design may be summarized by the following steps, refer to
figure 2-1:
Figure 2-1 Carrier Design Steps
2.1 Introduction
Within this chapter we will
- introduce the Sky WAN
®
data and voice networking.
- introduce the essential Sky WAN
®
MF-TDMA satellite link layer features.
- discuss the traffic calculation procedure taking into account the relevant Sky WAN
®
data
and voice networking features. The ND SatCom ’Capacity Calculator Tool’ has to be used.
- discuss how to derive an optimized carrier structure which fulfils the original customer re-
quirements with the help of the ND SatCom ’TDMA Calculator’ tool.
Consider the resulting effects of the design approach to network efficiency, network behavior
and future expansions.
The original plain requirements (refer to section A1 in figure 2-1) represent the customer input.
In general such requirements have to be adapted in order to make them suitable as input for
the satellite communication design.
The first task in section A1 Traffic Calculation is to define suitable ’core design requirements’.
Often it is necessary to convert the customer view to the specifics of a satellite network in con-
trast to terrestrial networks / fixed leased lines etc. Keep in mind the
Sky WAN
®
features, when
questioning the customer. Define the requirements down to a suitable level. This task cannot
be supported completely by a certain tool. Our suggested tool will give you an idea and some
guidance about what is necessary to document.