54 citations · 70 across the 18 of their papers we have counts for
22 papers
Network-Aware Progressive Replacement Sequence Planning for Laser-Enhanced BeiDou Navigation Constellations
Huan Yan, Juan A. Fraire, Ziqi Yang +5
The early satellites of the third-generation BeiDou Navigation Satellite System (BDS-3) are approaching the end of their design lifetime, making progressive constellation replaceme…
Contact Plan Design For Optical Interplanetary Communications
Jason Gerard, Juan A. Fraire, Sandra Cespedes
Space exploration missions generate rapidly increasing volumes of scientific telemetry that far exceed the capacity of today's manually scheduled, RF-based deep-space infrastructur…
POMDP-Based Routing for DTNs with Partial Knowledge and Dependent Failures
Gregory F. Stock, Alexander Haberl, Juan A. Fraire +1
Routing in Delay-Tolerant Networks (DTNs) is inherently challenging due to sparse connectivity, long delays, and frequent disruptions. While Markov Decision Processes (MDPs) have b…
Modeling Pointing, Acquisition, and Tracking Delays in Free-Space Optical Satellite Networks
Jason Gerard, Juan A. Fraire, Sandra Céspedes
Free-space optical inter-satellite links (OISLs) enable high-capacity space communications but require precise Pointing, Acquisition, and Tracking (PAT) between links. Current sche…
Selected Results from the REDMARS2 Project: Recursive Delay-Tolerant Networking using Bundle-in-Bundle Encapsulation
Marius Feldmann, Tobias Nöthlich, Felix Walter +4
This whitepaper presents parts of the results of the REDMARS2 project conducted in 2021-2022, exploring the integration of Recursive Internetwork Architecture (RINA) concepts into…
Joint Contact Planning for Navigation and Communication in GNSS-Libration Point Systems
Huan Yan, Juan A. Fraire, Ziqi Yang +11
Deploying satellites at Earth-Moon Libration Points (LPs) addresses the inherent deep-space coverage gaps of low-altitude GNSS constellations. Integrating LP satellites with GNSS i…
Dirty Bits in Low-Earth Orbit: The Carbon Footprint of Launching Computers
Robin Ohs, Gregory F. Stock, Andreas Schmidt +2
Low-Earth Orbit (LEO) satellites are increasingly proposed for communication and in-orbit computing, achieving low-latency global services. However, their sustainability remains la…
Custody Transfer and Compressed Status Reporting for Bundle Protocol Version 7
Alice Le Bihan, Felix Flentge, Juan A. Fraire
As space missions increase, there is a growing need to replace point-to-point communication with an efficient and reliable network-centric communication approach. Disruption/Delay…
On the Role of AI in Managing Satellite Constellations: Insights from the ConstellAI Project
Gregory F. Stock, Juan A. Fraire, Holger Hermanns +4
The rapid expansion of satellite constellations in near-Earth orbits presents significant challenges in satellite network management, requiring innovative approaches for efficient,…
Reliable Transmission of LTP Using Reinforcement Learning-Based Adaptive FEC
Liang Chen, Yu Song, Kanglian Zhao +2
Delay/Disruption Tolerant Networking (DTN) employs the Licklider Transmission Protocol (LTP) with Automatic Repeat reQuest (ARQ) for reliable data delivery in challenging interplan…
Contact Plan Design for Cross-Linked GNSSs: An ILP Approach for Extended Applications
Huan Yan, Juan A. Fraire, Ziqi Yang +10
Global Navigation Satellite Systems (GNSS) employ inter-satellite links (ISLs) to reduce dependency on ground stations, enabling precise ranging and communication across satellites…
Optimized Contact Plan Design for Reflector and Phased Array Terminals in Cislunar Space Networks
Huan Yan, Juan A. Fraire, Ziqi Yang +8
Cislunar space is emerging as a critical domain for human exploration, requiring robust infrastructure to support spatial users-spacecraft with navigation and communication demands…
IPN-V: The Interplanetary Network Visualizer
Alice Le Bihan, Juan A. Fraire, Pierre Francois +1
The Interplanetary Network (IPN) emerges as the backbone for communication between various spacecraft and satellites orbiting distant celestial bodies. This paper introduces the In…
A Stability-first Approach to Running TCP over Starlink
Gregory Stock, Juan A. Fraire, Santiago Henn +2
The end-to-end connectivity patterns between two points on Earth are highly volatile if mediated via a Low-Earth orbit (LEO) satellite constellation. This is rooted in the enormous…
The Architectural Refinement of μD3TN: Toward a Software-Defined DTN Protocol Stack
Felix Walter, Marius Feldmann, Juan A. Fraire +1
This paper provides a comprehensive overview of the uD3TN project's development, detailing its transformation into a flexible and modular software implementation of the Delay-/Disr…
Enhancing LR-FHSS Scalability Through Advanced Sequence Design and Demodulator Allocation
Diego Maldonado, Megumi Kaneko, Juan A. Fraire +3
The accelerating growth of the Internet of Things (IoT) and its integration with Low-Earth Orbit (LEO) satellites demand efficient, reliable, and scalable communication protocols.…
A Novel Non-Terrestrial Networks Architecture: All Optical LEO Constellations with High-Altitude Ground Stations
Pablo G. Madoery, Juan A. Fraire, Jorge M. Finochietto +2
The emergence of low Earth orbit (LEO) satellite mega-constellations is dynamically transforming the space sector. While free-space optical (FSO) links efficiently facilitate inter…
Recovering Headerless Frames in LR-FHSS
Juan A. Fraire, Alexandre Guitton, Oana Iova
Long-Range Frequency Hopping Spread Spectrum (LR-FHSS) is a recent modulation designed for communications from low-power ground end-devices to Low-Earth Orbit (LEO) satellites. To…
On the Automation, Optimization, and In-Orbit Validation of Intelligent Satellite Constellation Operations
Gregory Stock, Juan A. Fraire, Holger Hermanns +3
Recent breakthroughs in technology have led to a thriving "new space" culture in low-Earth orbit (LEO) in which performance and cost considerations dominate over resilience and rel…
Distributed On-Demand Routing for LEO Mega-Constellations: A Starlink Case Study
Gregory Stock, Juan A. Fraire, Holger Hermanns
The design and launch of large-scale satellite networks create an imminent demand for efficient and delay-minimising routing methods. With the rising number of satellites in such c…
Space-Terrestrial Integrated Internet of Things: Challenges and Opportunities
Juan A. Fraire, Oana Iova, Fabrice Valois
Large geographical regions of our planet remain uncovered by terrestrial network connections. Sparse and dense constellations of near-Earth orbit satellites can bridge this gap by…
Routing in Delay-Tolerant Networks under Uncertain Contact Plans
Fernando D. Raverta, Juan A. Fraire, Pablo G. Madoery +3
Delay-Tolerant Networks (DTN) enable store-carry-and-forward data transmission in networks challenged by frequent disruptions and high latency. Existing classification distinguishe…