Study on feasibility of SATCOM for railway communication

Final Report
Non-technical and non-functional criteria
Criterion ID
CRT-NONT-1
CRT-NONT-2
CRT-NONT-3
CRT-NONT-4
CRT-NONT-5
Criterion
The proposed SATCOM system for the future railway communications architecture shall have a
universally assumed sustained lifecycle covering the total timespan of the FRMCS without risk
of obsolescence. Due to current estimates of migration from GSM-R, roll-out of the next
generation systems is expected around the year 2022. Taking into account reference lifecycles
of such systems, a sustainability of minimum 15 years is expected after this date.
The proposed SATCOM system for the future railway communications architecture shall provide
for easy serviceability that has minimal impact on operations, whether it is due to scheduled or
unscheduled maintenance/repair. Additionally, the system shall ensure that technical and multitechnology
criteria compliance is maintained within the required limits throughout the lifetime of
the assemblies. However, during preventative or corrective maintenance, the subsystem may not
be able to respect the values quoted in the Basic Parameters; the maintenance rules shall
ensure that safety is not prejudiced during these activities.
The proposed SATCOM system for the future railway communications architecture shall provide
at least an acceptable level of cost efficiency, taking into account full lifecycle costs covering
the full lifespan of the selected solution, and as long as technical and functional requirements
allow for this option.
The proposed SATCOM system for the future railway communications architecture shall
demonstrate forecasted full lifecycle costs that are, by all acceptable estimates, not higher than
those of GSM-R.
The proposed SATCOM system for the future railway communications architecture shall
demonstrate a forecasted full lifecycle economic internal rate of return (IRR, alternatively
ERR) above the average minimum acceptable rate of return (MARR) set by the target Member
States for public investments.
Standards shall be used to the extent possible to ensure interoperability of the proposed
SATCOM system for the future railway communications architecture with communication
systems (satellite, terrestrial and possible gap fillers). Additionally, the mandatory standards
listed in this table shall be applied in the certification process:
CRT-NONT-6
CRT-NONT-7
EN 50126 Railway applications — The specification and demonstration of
reliability, availability, maintainability and safety (RAMS)
EN 50128 Railway applications — Communication, signalling and processing
systems — Software for railway control and protection systems
EN 50129 Railway applications — Communication, signalling and processing
systems — Safety related electronic systems for signaling
EN 50159 Railway applications — Communication, signalling and processing
systems — Safety-related communication in transmission systems
The proposed SATCOM system for the future railway communications architecture shall hold at
least a universally accepted technology readiness level (TRL) of 7 or above.
Table 15: Non-technical and non-functional criteria identified
Doc.Nº: SRAIL-FNR-010-IND
Edit./Rev.: 1/1
Date: 16/02/2017
Page 63 of 285