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

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.


Illustration of the satellite cluster simulation scenario showing the trajectories of Sat2-6 moving with Sat1 (a) and distance varying with time from Sat16 to Sat1 (b).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC5375731&req=5

sensors-17-00445-f006: Illustration of the satellite cluster simulation scenario showing the trajectories of Sat2-6 moving with Sat1 (a) and distance varying with time from Sat16 to Sat1 (b).

Mentions: Let Sat1 be the reference center of the relative motion coordinate system. Then, the rest can be described as running at a range of (0, 30 km) with Sat1. The main parameters of Sat1 are listed in Table 2. Figure 6a shows part of the satellite runs with Sat1 in the cluster. Figure 6b shows the periodic variation of distance from Sat16 to Sat1, where is the maximum communication range.


A Topology Control Strategy with Reliability Assurance for Satellite Cluster Networks in Earth Observation
Illustration of the satellite cluster simulation scenario showing the trajectories of Sat2-6 moving with Sat1 (a) and distance varying with time from Sat16 to Sat1 (b).
© Copyright Policy - open-access
Related In: Results  -  Collection

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

sensors-17-00445-f006: Illustration of the satellite cluster simulation scenario showing the trajectories of Sat2-6 moving with Sat1 (a) and distance varying with time from Sat16 to Sat1 (b).
Mentions: Let Sat1 be the reference center of the relative motion coordinate system. Then, the rest can be described as running at a range of (0, 30 km) with Sat1. The main parameters of Sat1 are listed in Table 2. Figure 6a shows part of the satellite runs with Sat1 in the cluster. Figure 6b shows the periodic variation of distance from Sat16 to Sat1, where is the maximum communication range.

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.