Virtualbricks for DTN Satellite Communications Research and Education

Apollonio, Pietrofrancesco; Caini, C.; Giusti, M; Lacamera, D.

doi:10.1007/978-3-319-47081-8_7

Cited by 11 publications

(8 citation statements)

References 10 publications

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“…In order to do so, a system with DTN protocols and optical wireless links should be emulated, with the use of the platform Virtual Bricks [57]. When challenges arise, solutions can be found during an initial phase, before implementing the system for a real setup.…”

Section: Challengesmentioning

confidence: 99%

Review on Free-Space Optical Communications for Delay and Disruption Tolerant Networks

2021

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The increase of data-rates that are provided by free-space optical (FSO) communications is essential in our data-driven society. When used in satellite and interplanetary networks, these optical links can ensure fast connections, yet they are susceptible to atmospheric disruptions and long orbital delays. The Delay and Disruption Tolerant Networking (DTN) architecture ensures a reliable connection between two end nodes, without the need for a direct connection. This can be an asset when used with FSO links, providing protocols that can handle the intermittent nature of the connection. This paper provides a review on the theoretical and state-of-the-art studies on FSO and DTN. The aim of this review is to provide motivation for the research of an optical wireless satellite network, with focus on the use of the Licklider Transmission Protocol. The assessment presented establishes the viability of these networks, providing many examples to rely on, and summarizing the most recent stage of the development of the technologies addressed.

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Section: Challengesmentioning

confidence: 99%

Review on Free-Space Optical Communications for Delay and Disruption Tolerant Networks

2021

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“…Tests were carried out on a GNU/Linux virtual testbed created with Virtualbricks 26 . It consists of five virtual machines (VMs), one for each DTN node, connected by virtual switches and channel emulators.…”

Section: System Model Used In Testsmentioning

confidence: 99%

Schedule‐Aware Bundle Routing: Analysis and enhancements

Caini

Cola

Persampieri

2020

Satell Commun Network

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Summary The Delay‐/Disruption‐Tolerant Networking (DTN) architecture was designed to cope with challenges such as long delays and intermittent connectivity. To exploit the a priori knowledge of contacts, typical of space networks, NASA‐JPL designed and included in ION (its DTN protocol suite) the Contact Graph Routing (CGR) algorithm. This paper studies the latest version, recently standardized as Schedule‐Aware Bundle Routing (SABR) within the Consultative Committee for Space Data Systems (CCSDS). The first part of the paper is devoted to the algorithm analysis, which distinguishes three logical phases to examine sequentially. Following this comprehensive study, three enhancements are proposed, which aim to improve SABR accuracy and resistance against possible loops. They are studied on a simple but challenging DTN topology, implemented on a virtual GNU/Linux testbed. Tests are performed by running the latest version of ION and an independent implementation of SABR developed by the authors, Unibo‐CGR. The numerical results are then examined in detail to highlight both SABR mechanisms and the advantages offered by the proposed enhancements.

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“…Our experiment was performed on a GNU/Linux virtual testbed created and managed by means of Virtualbricks 29 . The testbed consists of nine virtual machines (VMs), one for each DTN node, connected by virtual switches and channel emulators.…”

Section: Testbed and Experiments Descriptionmentioning

confidence: 99%

DTN performance analysis of multi‐asset Mars‐Earth communications

Alessi

Caini

Cola

et al. 2019

Satell Commun Network

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Summary The delay‐/disruption‐tolerant networking (DTN) architecture is considered the key enabling technology for future space communications, as confirmed by the current standardization within CCSDS and the experiments carried out onboard the International Space Station. Despite the scientific community efforts to analyze DTN architecture performance, most of the studies have focused on individual protocols, or have considered simple test cases, thus missing a whole system view. To bridge these research gaps, this paper presents a comprehensive analysis of DTN performance in Mars‐Earth communications, considering a realistic and complex end‐to‐end scenario, where multiple assets and multiple data flows are involved, as envisioned for future space missions. To this end, a virtualized testbed based on ION software was used for an extensive emulation campaign, focusing particularly on Bundle and Licklider Protocol interaction with the CGR routing algorithm.

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Virtualbricks for DTN Satellite Communications Research and Education

Cited by 11 publications

References 10 publications

Review on Free-Space Optical Communications for Delay and Disruption Tolerant Networks

Review on Free-Space Optical Communications for Delay and Disruption Tolerant Networks

Schedule‐Aware Bundle Routing: Analysis and enhancements

DTN performance analysis of multi‐asset Mars‐Earth communications

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