Study on feasibility of SATCOM for railway communication

Final Report
o Enviromental monitoring
o FW/SW updates
o etc
The main features of SmartLNB are summarised below:
Low cost equipment providing return satellite link up to 160 kbps per terminal
Use of multiple frequency bands Ku and Ka
Highly efficient transmission protocol suitable for millions of connected objects.
6.2.11.2 System architecture
The SmartLNB solution relies on forward existing technologies in Ku or Ka bands, since the main
improvement is the introduction of a new LNB (Low-Noise Block) technology capable of providing a
new low throughput return channel (in Ku or Ka bands, as well). SmartLNB is optimised for bursts and
message-type traffic on the return link. The transmission protocol provides modulation and
asynchronous access scheme with very high spectrum efficiency (by using Enhanced Spread
Spectrum Aloha access scheme). In addition, it is worth to point out that forward link channel is based
on DVB-S2 standard. Both radio channels (forward and return) implemented in the smartLNB terminal
are referred as F-SIM (Fixed Satellite Interactive Multimedia services) protocol. This protocol has been
adopted by the recently deployed Eutelsat Broadcast Interactive System (EBIS) and F-SIM can be
seen as an evolution of legacy ETSI S-MIM standard [RD-07].
SmartLNB
Unicast
Multicast / Broadcast
IP
Figure 31: SmartLNB solution system architecture
6.2.12 GEO Ku-band
6.2.12.1 System Overview
Ku band is the portion of the electromagnetic spectrum comprised between 12 and 18 GHz, and is
primarily used for satellite communications.
Doc.Nº: SRAIL-FNR-010-IND
Edit./Rev.: 1/1
Date: 16/02/2017
Page 87 of 285