Study on feasibility of SATCOM for railway communication

Final Report
RATIONALE
A narrowband communication system (like GSM-R) is able to provide the critical voice and data
(ETCS) railway applications. The FRMCS URS v2.0 document details Critical Communication
Applications (among the rest of foreseen applications catalogued as non critical), and all of these
critical applications are detailed as ―Low‖ bandwidth required.
However, the URS document also shows the great variety of applications (not only critical) that the
future railway communications system should support, some of them requiring ―medium‖ or even
―high‖ bandwidth.
Therefore, and despite a narrowband system should be enough to provide service for critical
applications, it is recommended a broadband communication system for supporting the whole set
of applications defined at the URS document.
CRITERION TRACEABILITY
FRMCS URS v2.0
EIRENE SRS 16.0.0
EIRENE FRS 8.0.0
CRT-TECH-12 The proposed satcom system for the FRMCS shall provide ―user-to-user‖ and
―multi-user‖ types of communications for both voice and data services. In addition, each
communication can be bi-directional or uni-directional with any type of asymmetry between
forward and return channels (when bi-directional).
RATIONALE
According to the communication attributes defined in URS document [AD-01], the ―distribution‖ of
voice and data applications can be:
User-to-User
Multi-User
And the type of communication:
Bi-directional
Uni-directional
Within the URS document there are critical communication applications defined with every
possible combination of distribution and type communication attributes.
CRITERION TRACEABILITY
FRMCS URS v2.0
CRT-TECH-13
RATIONALE
The minimum required coverage of the satcom system shall be Europe.
Since the ERTMS/ETCS is a European ATC standard for railway interoperability, the European
area shall be covered (or possible to be covered) by the future railway communication(s)
system(s) deployed.
In addition, those areas where currently it has been deployed also the ERTMS system (outside
Europe), it should be possible to deploy the future communication solution.
Doc.Nº: SRAIL-FNR-010-IND
Edit./Rev.: 1/1
Date: 16/02/2017
Page 192 of 285