NGSO
C-DReAM NGSO generic template provides a  NGSO (Non-Geostationary Satellite Orbit) satellite constellation simulation capability with highly configurable parameterization. The template is implemented by the C-DReAM simulator, which is a link budget / capacity level system simulator. The template can be used for e.g.
NGSO satellite constellation design and/or capacity planning and optimization
NGSO satellite coverage/availability and link budget analysisÂ
Radio resource management algorithm development and testing
Visual demonstrations for pre-sales support or demo purposes
Essential pre-conditions
C-DReAM is a link budget / capacity level system simulator, i.e. we cannot observe e.g. packet-level statistics, such as delay or jitter.
Traffic is modeled by means of traffic demand in kbps, which is aimed to be offered to the user, either in uplink or downlink.
Focus is on user link (i.e. link between user terminals and satellite), in both uplink and downlink. The feeder link or ISLs are not considered (TBA)
Configurable NGSO satellite constellations, i.e. number of satellites, orbits, altitudes, etc, are configurable. Geostationary systems, terrestrial networks and hybrid TN/NTN networks are TBA.
Bessel (TR 38.821) based beam patterns either in quasi-earth-fixed (QEF) or earth-moving (EM) configurations. GRASP based input TBA.
Stationary user terminals. The terminals are positioned in randomized positions with certain configurable geographical limitations (e.g. continent and country). Moving terminals TBA.
Terminals can have either omnidirectional antenna or VSAT antenna, which is modeled by means of TR 38.811 Bessel model. Active antennas (antenna panel arrays) TBA.
5G NR-NTN waveforms (Table 1, 2 or 3) in both downlink and uplink. DVB-S2X/RCS2 TBA.
Simple fair reference resource management algorithm, i.e. scheduler. Note, the algorithm cannot be currently changed entirely by the user (only within the capabilities of current parameterization), but that requires further development in SimLab and/or C-DReAM simulator.