Study on feasibility of SATCOM for railway communication

Final Report
GEO / L-band + ANTARES CS (IRIS FOC)
Criterion ID Criterion Evaluation Justification
CRT-TECH-8
CRT-TECH-9
CRT-TECH-10
CRT-TECH-11
The proposed satcom system shall allow (at least) the
estimated number of European FRMCS users by 2030
registered simultaneously.
The proposed satcom system shall provide priority and preemption
mechanisms.
The proposed satcom system shall support Data and Voice
services.
The proposed satcom system shall support as minimum Low
bandwidth applications
C
C
C (Low)
C (Low)
This solution uses a highly efficient transmission protocol suitable for thousands of
connected objects simultaneously. In addition, this system also benefits from the
frequency reuse mechanism.
ANTARES defines several CoS in order to prioritize traffic. Moreover, additional
implementation at IP level (L3) can be added by means of QoS IP routers.
Despite the ANTARES CS is oriented to data bursts messages, it supports both
voice and data services. However, the number of calls shall be limited in order not
to degrade the performance of the system and to reduce efficiency.
ANTARES CS has been conceived to support low bandwidth applications.
Therefore, it could support critical railway applications.
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 bidirectional).
C
Since this is an "open" all-IP solution, every type of communications can be
implemented at least at IP level.
The ANTARES standard provides all types of communications except the user-tomultiuser
from the remote terminal point of view (i.e. on the return link). In this
case, an implementation at IP level in the control plane should be required.
CRT-TECH-13
The minimum required coverage of the satcom system shall be
Europe.
C
This theoretical solution shall be designed in order to cover (at least) the European
region.
CRT-TECH-14
The satcom system shall provide communications for remote
terminals when stationary and when travelling at speeds up to
the maximum allowable line speed or 500 km/h, whichever is
the lower.
C
ANTARES CS has been conceived as an standard for Air Traffic Management
(ATM). Therefore it includes all the mechanisms to support high speed.
CRT-TECH-15
The proposed satcom system shall be flexible to support (at
least) new created apps in the future.
C (Low)
ANTARES CS has been designed taking into account flexibility. This way, different
carriers type with different spreading factors are available.
Doc.Nº: SRAIL-FNR-010-IND
Edit./Rev.: 1/1
Date: 16/02/2017
Page 241 of 285