PAGE CONTENTS
Objectives
The use of NGSO satellite constellations offers many advantages for the communication missions, in particular potential global coverage (possibly adapted to demand density), low delay transmission, robustness of the system, and potential low cost of gigabit per second.
To meet non uniform and evolving user demand as well as coordination with other systems and regulatory constraints, payload flexibility and reconfigurability will be key features of on-going and future constellation projects.
Thus, besides the constellation dynamics inducing constant changes in the user or feeder links properties and frequent handovers, the system flexibility features and constraints need also to be considered for the radio-resource management which lead to a highly complex problem to optimize.
In this study, the objective is then to take into account all these aspects to design, implement and evaluate an RRM algorithm that shall provide the highest possible performance (in regards with defined KPIs) whilst dealing with operational constraints (particularly in terms of computation time).
Challenges
The first challenge of the project was the choice of the algorithms to develop, given the constraints of time calculations, and the objective of maximizing the constellation throughput.
The second challenge was the optimization of the simulator speed of calculation of the interferences.
The third challenge was the choice and the design of the system scenarios, to be as close as possible to a real one
System Architecture
This project emulates a non-geo stationary constellation with a powerful simulator. This simulator is based on multiple modules, where each module either reads inputs from simulation tools, or computes precise information, such as interferences. Finally, the simulator has the capability to export multiple outputs (statistics, figures …). That can be configured by the user through configuration files.
Plan
The development logic follows these steps:
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System scenario definition
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Technical requirement specification
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RRM module design
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RRM demonstrator design
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RRM demonstrator development
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RRM performance assessment
Regarding the industrial organisation, Magister is responsible of the design and development of the simulator, while Thales Alenia Space is responsible of the overall project, including the definition of the system and of the algorithm of the RRM module.
Current Status
The project has been completed.
