Fixed Satellite System

FSS template provides use case to build campaigns to simulate forward (FWD) link performance and beam hopping in configured beam scenario (2-72 beams). Modulation and channel coding according to DVB-S2 or DVB-S2X used for traffic transmission. Constant Bit Rate (CBR) traffic model is used to generate application level traffic. Template is implemented by the SNS3 simulator.

Essential pre-conditions

Periodical control slots with 100 milliseconds interval
Random access disabled
Super frame configuration:
- Allocated bandwidth [Hz]: 20e5
- Carrier allocated bandwidth [Hz]: 5e5
- Carrier roll-off factor: 0.2
- Carrier spacing factor: 0.3
FWD carrier allocated bandwidth [Hz]: 1.25e8
(can be scaled down)
TX maximum power [dBW]: 15
(can be scaled down)
Fading model: off
CBR traffic

Configurable options

Beams enabled: 2 - 72
Enabling external fading input traces reading in random mode
Number of the UTs per a beam
Packet size and interval for CBR traffic
Beam hopping mode: NONE, STATIC, DYNAMIC
Beam hopping pattern input selection
Scale down factor for FWD carrier and TX power: 1 - 350.0
DVB-S2X enabling/disabling
Enabling dummy frame sending for FWD link
ACM disabling/enabling for FWD link
Default ModCod selection for FWD link
Options for FWD link scheduler:
- C/NO estimation mode and window selection
- Interval for periodic scheduling
- Scheduling start and stop threshold times
- Additional sorting criteria after priority