Landmark DORSAL Paper Published in the IEEE
Internet of Things Journal
Date: July 2026
Venue: IEEE Internet of Things Journal
Our landmark paper, “DORSAL: Downlink Optimization for Robust Direct-to-Satellite
LoRaWAN”, co-authored by the full consortium, has been published. It presents the first
Mixed-Integer Linear Programming scheduler for downlink delivery in Direct-to-Satellite LoRaWAN
networks, built around the novel Downlink Arrival Receive-window Timing (DART) constraint.
UFSC Visit to Lyon & 4th DORSAL-IoT Workshop
Date: July 15, 2026
Location: Inria Lyon, France & Online
Richard Demo Souza and Felipe Tondo (UFSC, Brazil) visited the Agora team at Inria Lyon.
Richard delivered a keynote, “Direct-to-Satellite IoT: Some Results and Work in
Progress”, and both joined the 4th DORSAL-IoT Workshop, held online with partners in
France, Chile, and Brazil.
- Felipe Tondo: FreeChirp-Enhanced NOMA for LoRa DtS-IoT Uplink
- Camila Conde: Airtime-Balanced SF Allocation for LoRa DtS-IoT
- Luis Cocian: Energy-Aware DtS-IoT for Flash Flood Sensing
- Antonio Dávila: Propagation-Aware Scheduling for DtS-IoT
- Luis Cardenas: Frame-Based MAC for Federated Learning on DtS-IoT
Visit: DORSAL-IoT Delegation at the National
Space Center
Date: November 27, 2025
Location: Centro Espacial Nacional, Santiago,
Chile
Members of the international DORSAL-IoT project and faculty from Universidad Diego Portales
visited the National Space Center to learn about Chilean satellite capabilities and the progress
achieved by the Chilean Air Force (FACh) in space technologies.
Talk: Distributed Geolocalization Using
Broadcast Wireless Communication
Date: November 26, 2025
Location: IDT UTEM, San Joaquín, Santiago,
Chile
As part of the 3rd DORSAL-IoT Workshop, Prof. Hervé Rivano (INSA Lyon – Inria Agora) presented a
keynote talk on distributed geolocalization using broadcast wireless communication for ranging.
The event was supported by IEEE ComSoc Chile and UTEM’s Institute for Technological Research and
Development (IDT).
Inria Chile Talk
Date: November 25, 2025
Location: Inria Chile, Santiago & Online
Oana Iova and Juan A. Fraire (Inria) presented a talk on the convergence of terrestrial and
satellite
communication technologies for the Internet of Things. The session explored LPWAN technologies
such as LoRa,
LR-FHSS, and LoRaWAN, as well as their extension to LEO satellite constellations.
Talk at UC Chile
Date: November 24, 2025
Location: Pontificia Universidad Católica de
Chile
Prof. Oana Iova (INSA Lyon, Inria) delivered a talk on the intersection of terrestrial and
satellite communications for IoT networks at the Internet of Things and Ubiquitous Computing
(IoT-UC) Laboratory and the ANID Center for Technological Research in Sistemas Ciberfísicos
(CPS-RTC).
3rd DORSAL-IoT Workshop
Date: November 24–28, 2025
Location: Santiago de Chile, Chile (onsite)
The third workshop brought the consortium together in Santiago to focus on advancing the
design and evaluation of efficient downlink strategies for Direct-to-Satellite IoT systems.
- Onsite working sessions with all partners
- Hands-on collaboration around use case design
- Progress toward protocol and tool development
Tutorial at IEEE LatinCom 2025
Date: November 5–7, 2025
Location: Antigua, Guatemala (onsite)
Alexander Ylnner Choquenaira Florez (PhD candidate at Inria), with support from Benoit
Coeugnet (PhD candidate at Inria/Kinéis), presented a tutorial on simulating Direct-to-Satellite
IoT networks
using OMNeT++ and FLoRaSat.
- Introduction to the OMNeT++ platform
- Hands-on to the FLoRaSat simulator
- Video: 📺
Watch the full tutorial
2nd DORSAL-IoT Workshop
Date: September 22–26, 2025
Location: Inria Lyon, France (onsite)
This second workshop included two days of research area meetings and three days of working
group
sessions to define the project roadmap. It focused on energy-aware satellite downlink
protocols for Direct-to-Satellite LoRaWAN IoT.
- Project-wide kickoff for roadmap planning
- Focus on cross-continental collaboration
- France, Brazil, and Chile partners involved
1st DORSAL-IoT Workshop
Date: July 9–10, 2025
Location: Inria Lyon, France (hybrid)
This first workshop gathered partners for two days of presentations and brainstorming. Topics
included TSCH scheduling, Doppler shift handling, Direct-to-Satellite IoT simulations, and
federated learning strategies.
- Hybrid event (onsite & online)
- Participants from Inria, UFSC, UCH, UC, UDP, UTEM
