Study on feasibility of SATCOM for railway communication

Final Report
Figure 15: Railway communication architecture including SATCOM and terrestrial systems
NGN concept separates applications from transport networks (bearers). This way, from the application
point of view it will not be important the selected bearer. Figure 16 shows this new concept where
several bearers are available and they are used depending on the type of terminal and availability.
The core transport network is based on IP and the services and applications are agnostic to the
bearer.
It means that, depending on the concrete situation of each user, a terminal may need to change of
bearer in order to keep its connectivity. With the aim of not disrupting the service, a smooth transition
between bearers is expected, and it shall be transparent, seamless and without any action required
from the user side. One important key element/mechanism within this point is the smart-routing,
which will provide the ability of changing of communication system when required according to current
availability and some other possible information like the preferred network configuration.
Doc.Nº: SRAIL-FNR-010-IND
Edit./Rev.: 1/1
Date: 16/02/2017
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