Tailored Routing Solution for FSO-Based Space–Air–Ground–Sea Integrated Networks (SAGSINs)
Problem Statement:
Routing protocols designed for RF networks assume stable, omnidirectional, and continuously available links. These assumptions do not hold in FSO-based SAGSINs, where links are highly directional, intermittent, weather-sensitive, and subject to non-negligible acquisition, tracking, and pointing (ATP) delays, as well as strict terminal/beam constraints. As a result, classical routing approaches fail to ensure reliable connectivity, stability, and performance in such environments. This project aims to investigate these limitations and develop routing strategies tailored to the unique characteristics of FSO-SAGSINs.
Task:
The student will first analyze existing RF routing solutions and explain why they are inadequate for FSO-SAGSINs. They will then identify key network constraints (mobility, LoS dependence, limited terminals, dynamic topology) and define relevant KPIs such as connectivity, throughput, latency, route stability, number of link changes, and packet delivery ratio.
Next, the student will classify routing approaches (e.g., static vs dynamic, reactive vs predictive, centralized vs distributed) and assess their suitability for FSO-SAGSINs.
Finally, will propose a tailored routing solution that explicitly accounts for FSO-specific characteristics such as High topology change, ATP delays, and beam limitations. The proposed method should include a clear routing metric or decision logic and be compared against a baseline RF routing approach.
A realistic FSO-SAGSIN simulation setup is available and can be used to support the evaluation and validation of the proposed solution.
Work:
Theory: 30%, Simulations: 50%, Writing: 20%
Contact:
Schisin Ndongson (s.a.douatsapndongson@utwente.nl)