Space-Based Distributed Computing Using a Networked Constellation of Small Satellites

Gunter, B. C.; Maessen, D.C.

doi:10.2514/1.a32384

Cited by 9 publications

(5 citation statements)

References 18 publications

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“…We also assume that all the satellites are equipped with regenerative payload and belong to an LEO constellation operating in the Ka-band with FFR adopted. Furthermore, there are optical inter-satellite links (ISLs) to exchange data among satellites, and the satellites can perform on-board distributed computing to share computation load [41], [42]. The earth station periodically sends topological relationships of the constellation to the satellites via its line of sight (LoS) and satellites can share the topological relationships through ISLs.…”

Section: A System Architecturementioning

confidence: 99%

School of Mechanical Engineering, Shanghai Jiao Tong University, 200240, Shanghai, China

Zhuang

Huang

et al. 2019

Mathematical Biosciences and Engineering

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The crystallization kinetics and melting behavior of nylon 10,10 in neat nylon 10,10 and in nylon 10,10 -montmorillonite (MMT) nanocomposites were systematically investigated by differential scanning calorimetry. The crystallization kinetics results show that the addition of MMT facilitated the crystallization of nylon 10,10 as a heterophase nucleating agent; however, when the content of MMT was high, the physical hindrance of MMT layers to the motion of nylon 10,10 chains retarded the crystallization of nylon 10,10, which was also confirmed by polarized optical microscopy. However, both nylon 10,10 and nylon 10,10 -MMT nanocomposites exhibited multiple melting be-havior under isothermal and nonisothermal crystallization conditions. The temperature of the lower melting peak (peak I) was independent of MMT content and almost remained constant; however, the temperature of the highest melting peak (peak II) decreased with increasing MMT content due to the physical hindrance of MMT layers to the motion of nylon 10,10 chains.

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Section: A System Architecturementioning

confidence: 99%

School of Mechanical Engineering, Shanghai Jiao Tong University, 200240, Shanghai, China

Zhuang

Huang

et al. 2019

Mathematical Biosciences and Engineering

View full text Add to dashboard Cite

show abstract

“…We also assume that all the satellites are equipped with regenerative payload and belong to an LEO constellation operating in the Ka-band with FFR adopted. Furthermore, there are optical inter-satellite links (ISLs) to exchange data among satellites, and the satellites can perform on-board distributed computing to share computation load [13]. The earth station periodically sends topological relationships of the constellation to the satellites via its line of sight (LoS) and satellites can share the topological relationships through ISLs.…”

Section: A System Architecturementioning

confidence: 99%

Joint Hybrid Beamforming and User Scheduling for Multi-Satellite Cooperative Networks

Zhang¹,

Sun²,

Tao³

et al. 2023

Preprint

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In this paper, we consider a cooperative communication network where multiple satellites provide services for ground users (GUs) (at the same time and on the same frequency). The communication and computational resources on satellites are usually restricted and the satellite-GU link determination affects the communication performance significantly when multiple satellites provide services for multiple GUs in a collaborative manner. Therefore, considering the limitation of the on-board radio-frequency chains, we first propose a hybrid beamforming method consisting of analog beamforming for beam alignment and digital beamforming for interference mitigation. Then, to establish appropriate connections between satellites and GUs, we propose a heuristic user scheduling algorithm which determines the connections according to the total spectral efficiency (SE) increment of the multi-satellite cooperative network. Next, a joint hybrid beamforming and user scheduling scheme is proposed to dramatically improve the performance of the multi-satellite cooperative network. Moreover, simulations are conducted to compare the proposed schemes with representative baselines and analyze the key factors influencing the performance of the multisatellite cooperative network. It is shown that the proposed joint beamforming and user scheduling approach can provide 47.2% SE improvement on average as compared with its non-joint counterpart.

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“…Requirements for the Deployment of FSS FSS, as other Distributed Satellite Systems (DSS) concepts, intends to share resources such as bandwidth, data storage, and data processing. Distributed computing arrays in orbit have also been proposed to enable new applications requiring reactive processing of raw data in orbit [15]. Table 1 provides a detailed comparison of federated, collaborative, fractionated concepts for satellite systems [16].…”

Section: Related Literature: Informing the Technicalmentioning

confidence: 99%

Identifying Retrofitting Opportunities for Federated Satellite Systems

Akhtyamov

Vingerhoeds

Golkar

2019

Journal of Spacecraft and Rockets

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This paper aims at identifying retrofitting possibilities to incorporate existing spacecraft into a network of federated satellite systems. The paper presents a systematic review of possible retrofitting options, such as direct modifications including replacement and addition of interfaces, and indirect modifications through the addition of intermediary federated negotiators. The paper considers existing frequency regulations for the analysis in the technical domain, but does not take into consideration how complex or time-consuming any legislative changes might be. Although the paper concludes that direct modifications of existing satellites are nonfeasible from a technical point of view, it identifies a possible scenario of retrofitting by adding intermediary negotiator satellites. The link budget for the intersatellite link between an existing satellite mission, such as SPOT-6, and a conceptual satellite negotiator was estimated. The work concludes that from a link budget point of view and existing technology, such a configuration can provide a slant range from several hundred to thousands of kilometers. The work defines models for trade-off analysis identifying correlations between satellite negotiator parameters and the number of covered satellites. The paper concludes proposing several possible satellite negotiator architectures and high-level technical requirements based on analysis of characteristics of existing and planned satellites.

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Space-Based Distributed Computing Using a Networked Constellation of Small Satellites

Cited by 9 publications

References 18 publications

School of Mechanical Engineering, Shanghai Jiao Tong University, 200240, Shanghai, China

School of Mechanical Engineering, Shanghai Jiao Tong University, 200240, Shanghai, China

Joint Hybrid Beamforming and User Scheduling for Multi-Satellite Cooperative Networks

Identifying Retrofitting Opportunities for Federated Satellite Systems

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