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A Topology Control Strategy with Reliability Assurance for Satellite Cluster Networks in Earth Observation

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ABSTRACT

This article investigates the dynamic topology control problem of satellite cluster networks (SCNs) in Earth observation (EO) missions by applying a novel metric of stability for inter-satellite links (ISLs). The properties of the periodicity and predictability of satellites’ relative position are involved in the link cost metric which is to give a selection criterion for choosing the most reliable data routing paths. Also, a cooperative work model with reliability is proposed for the situation of emergency EO missions. Based on the link cost metric and the proposed reliability model, a reliability assurance topology control algorithm and its corresponding dynamic topology control (RAT) strategy are established to maximize the stability of data transmission in the SCNs. The SCNs scenario is tested through some numeric simulations of the topology stability of average topology lifetime and average packet loss rate. Simulation results show that the proposed reliable strategy applied in SCNs significantly improves the data transmission performance and prolongs the average topology lifetime.

No MeSH data available.


Topology configuration with the highest reliability (m shortest paths, k redundant paths).
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sensors-17-00445-f005: Topology configuration with the highest reliability (m shortest paths, k redundant paths).

Mentions: Equation (12) shows that the optimal reliability of the whole network topology requires each sub-topology’s reliability to be optimal. Additionally, it is obvious that when the sub-topology is designed as the configuration in Figure 5, i.e., all paths are in parallel, the reliability is the best.


A Topology Control Strategy with Reliability Assurance for Satellite Cluster Networks in Earth Observation
Topology configuration with the highest reliability (m shortest paths, k redundant paths).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5375731&req=5

sensors-17-00445-f005: Topology configuration with the highest reliability (m shortest paths, k redundant paths).
Mentions: Equation (12) shows that the optimal reliability of the whole network topology requires each sub-topology’s reliability to be optimal. Additionally, it is obvious that when the sub-topology is designed as the configuration in Figure 5, i.e., all paths are in parallel, the reliability is the best.

View Article: PubMed Central - PubMed

ABSTRACT

This article investigates the dynamic topology control problem of satellite cluster networks (SCNs) in Earth observation (EO) missions by applying a novel metric of stability for inter-satellite links (ISLs). The properties of the periodicity and predictability of satellites’ relative position are involved in the link cost metric which is to give a selection criterion for choosing the most reliable data routing paths. Also, a cooperative work model with reliability is proposed for the situation of emergency EO missions. Based on the link cost metric and the proposed reliability model, a reliability assurance topology control algorithm and its corresponding dynamic topology control (RAT) strategy are established to maximize the stability of data transmission in the SCNs. The SCNs scenario is tested through some numeric simulations of the topology stability of average topology lifetime and average packet loss rate. Simulation results show that the proposed reliable strategy applied in SCNs significantly improves the data transmission performance and prolongs the average topology lifetime.

No MeSH data available.