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Sandra Cespedes, PhD

Pronouns: She/Her

Thesis supervisor Unavailable
  • Assistant Professor, Computer Science and Software Engineering

Research areas: Wireless Networks; Internet of Things; Vehicular Networking; Communication Protocols; Direct-to-Satellite IoT (DtS-IoT); Interoperable Network Architectures; 5G Networks; Internet Standardization

Contact information

Email:

sandra.cespedes@concordia.ca

ORCID:

0000-0003-1686-2644

CV:

View Sandra Cespedes's CV

Biography

Sandra Céspedes is an Assistant Professor with the Department of Computer Science & Software Engineering, Gina Cody School of Engineering and Computer Science, Concordia University, where she leads the Wireless Networking Research Group (WiNET). Prior to joining Concordia University, Dr. Céspedes was a tenure‑track Assistant Professor in the Department of Electrical Engineering at the University of Chile, where she was promoted to Associate Professor in 2021. She was the Head of Research at NIC Chile Research Labs, University of Chile, from 2018 to 2021. Dr. Céspedes holds an Honorary Affiliate Professorship at Icesi University, Colombia, since 2017. She has been an Associate and International Researcher with the Advanced Center of Electrical and Electronic Engineering (AC3E), Chile, since 2020. 

Dr. Céspedes received her Ph.D. in Electrical \& Computer Engineering in 2012 from the University of Waterloo, Canada, a Specialized Graduate Diploma in Organizational IT Management in 2007 and an Engineering degree in Telematics (Magna Cum Laude) in 2003, both from Icesi University, Colombia. 

Dr. Céspedes research focuses on the topics of mobile networking, protocol design for constrained environments and the Internet of Things, near-Earth and deep-space IoT networks, connected vehicles, cyber‑physical systems, and rural connectivity. She has served as Associate Editor for leading venues such as the IEEE Internet of Things Journal, IEEE Vehicular Technology Magazine, IEEE Access - Vehicular Technology Section, and IEEE Internet of Things Magazine. She is an active contributor to Internet standards at the IETF and a co‑author of several RFCs. 

Publications

Journal Articles

2026
  • *J. Sandoval, *A. Yanez, S. Céspedes, “RLQO: Reinforcement Learning-Based AQM for Fluctuating mmWave RAN Links in 5G-A/6G,” IEEE Access, vol. 14, pp. 13768–13782, Jan 2026.
  • *R. Ortigueira-Ruiz, S. Céspedes, M. E. Diago-Mosquera, S. Montejo-Sánchez, “WASY: A Distributed Time Slot Synchronization Mechanism for Direct-to-Satellite IoT Systems,” IEEE Wireless Communications Letters, vol. 15, pp. 1340–1344, 2026.
  • J. S. Sidhu, *J. Sandoval, A. Bentaleb, S. Céspedes, “From 5G RAN Queue Dynamics to Playback: A Performance Analysis for QUIC Video Streaming,” IEEE Transactions on Networking, vol. 34, pp. 2384–2399, 2026.
2025
  • *F. Medina, H. Ruiz, E. Avendaño, S. Céspedes, “Toward Safer Mines: A Robust Wireless Sensor Network Placement for Real-World Underground Conditions,” IEEE Access, vol. 13, pp. 213323–213335, 2025.
  • F. A. Tondo, J. M. d. S. Sant’Ana, S. Montejo-Sánchez, O. L. A. López, S. Céspedes, R. D. Souza, “Non-Orthogonal Multiple-Access Strategies for Direct-to-Satellite IoT Networks,” IEEE Transactions on Aerospace and Electronic Systems, vol. 61, no. 6, pp. 16267–16279, Dec 2025.
  • *A. Yanez, F. Salas, C. Azurdia-Meza, *J. Sandoval, S. Céspedes, “Enhancing Urban Road Safety: A 5G NR Model for Vulnerable Road Users Awareness,” IEEE Access, vol. 13, pp. 99170–99182, Jun 2025.
  • *T. Núñez-González, C. Azurdia-Meza, *R. Ortigueira, S. Montejo-Sánchez, *J. Ordenes-Pinto, M. Diago-Mosquera, S. Céspedes, “Enhancing LEO direct-to-satellite channel modeling with the shadowing effect via K-distribution,” ICT Express, vol. 11, issue 3, pp. 559–564, Jun 2025.
2024
  • *R. Ortigueira, S. Montejo-Sánchez, S. Henn, J. A. Fraire, S. Céspedes, “Satellite Visibility Prediction for Constrained Devices in Direct-to-Satellite IoT Systems,” IEEE Sensors Journal, vol. 24, no. 16, pp. 26630–26644, Aug 2024.
  • S. Bolufé, J. F. Silva, C. A. Azurdia-Meza, I. Soto, S. Céspedes, “Road Incident Detection Under Rate Adaptation-Based Congestion Control in Cooperative Vehicular Systems,” IEEE Access, vol. 12, pp. 111899–111914, 2024.
  • S. Espinosa, J. Silva, S. Céspedes, “A Survey on Error Exponents in Distributed Hypothesis Testing: Connections with Information Theory, Interpretations and Applications,” Entropy, 2024, 26, 596.
2023
  • *P. Ilabaca Parra, S. Montejo-Sánchez, J. A. Fraire, R. D. Souza, S. Céspedes, “Network Size Estimation for Direct-to-Satellite IoT,” IEEE Internet of Things Journal, vol. 10, no. 7, pp. 6111–6125, Apr 2023.
  • F. A. Tondo, V. D. P. Souto, O. L. Alcaraz López, S. Montejo-Sánchez, S. Céspedes, R. D. Souza, “Optimal Traffic Load Allocation for Aloha-Based IoT LEO Constellations,” IEEE Sensors Journal, vol. 23, no. 3, pp. 3270–3282, Feb 2023.
2022
  • *A. Arteaga, S. Céspedes, C. A. Azurdia-Meza, “Toward the Coexistence of Cognitive Networks for Vehicular Communications on TVWS for IEEE Std. 802.22,” IEEE Transactions on Cognitive Communications and Networking, vol. 8, no. 3, pp. 1316–1331, Sept 2022.
  • G. Álvarez, J. A. Fraire, K. A. Hassan, S. Céspedes, D. Pesch, “U-link Transmission Policies for LoRa-Based Direct-to-Satellite IoT,” IEEE Access, vol. 10, pp. 72687–72701, 2022.
  • *R. Muñoz, J. Saez Hidalgo, F. Canales, D. Dujovne, S. Céspedes, “SCHC over LoRaWAN Efficiency: Evaluation and Experimental Performance of Packet Fragmentation,” Sensors, vol. 22, 1531, 2022.
  • M. Román Cañizares, P. Palacios Játiva, C. A. Azurdia-Meza, S. Montejo-Sanchez, S. Céspedes, “Impact of Diversity Combining Schemes in a Multi-cell VLC System with Angle Diversity Receivers,” Photonic Network Communications, vol. 43, pp. 13–22, 2022.
  • J. F. González-Saavedra, M. Figueroa, S. Céspedes, S. Montejo-Sánchez, “Survey of Cooperative Advanced Driver Assistance Systems: From a Holistic and Systemic Vision,” Sensors, vol. 22, 3040, 2022.
2021
  • *Ortigueira, Raydel, Juan A. Fraire, Alex Becerra, Tomás Ferrer, and Sandra Céspedes. “RESS-IoT: A scalable energy-efficient MAC protocol for direct-to-satellite IoT.” IEEE Access 9, pp. 164440–164453, Dec 2021.
  • Aguilar, Sergio, *Diego S. Wistuba La-Torre, Antonis Platis, Rafael Vidal, Carles Gomez, Sandra Céspedes, and Juan Carlos Zúñiga. “Packet fragmentation over Sigfox: implementation and performance evaluation of SCHC ACK-on-error.” IEEE Internet of Things Journal 9, no. 13, pp. 11057–11070, Nov 2021.
  • Tondo, Felipe Augusto, Samuel Montejo-Sánchez, Marcelo Eduardo Pellenz, Sandra Céspedes, and Richard Demo Souza. “Direct-to-satellite IoT slotted aloha systems with multiple satellites and unequal erasure probabilities.” Sensors 21, no. 21, p. 7099, Oct 2021.
  • J. Jeong, Y. Shen, T. Oh, S. Céspedes, N. Benamar, M. Wetterald, J. Haerri, “A Comprehensive Survey on Vehicular Networks for Smart Roads: A Focus on IP-Based Approaches,” Vehicular Communications, vol. 29, no. 100334, Jun 2021.
  • *T. Lara, *A. Yáñez, S. Céspedes, A. S. Hafid, “Impact of Safety Message Generation Rules on the Awareness of Vulnerable Road Users,” Sensors 21, no. 10, May 2021.
  • *F. Valle, S. Céspedes, A. Hafid, “Automated Decision System to Exploit Network Diversity for Connected Vehicles,” IEEE Transactions on Vehicular Technology, vol. 70, no. 1, Jan 2021.
2020
  • *S. Bolufé, C. A. Azurdia-Meza, S. Céspedes, S. Montejo-Sánchez, “Impact of Awareness Control on V2V-based Overtaking Application in Autonomous Driving,” IEEE Communications Letters, in press, Dec 2020.
  • I. Serban, S. Céspedes, C. Marinescu, C. A. Azurdia-Meza, J. S. Gómez, D. Sáez, “Communication Requirements in Microgrids: A Practical Survey,” IEEE Access, vol. 8, pp. 47694–47712, 2020.
  • *S. Bolufé, C. A. Azurdia-Meza, S. Céspedes, S. Montejo-Sánchez, R. D. Souza, E. M. G. Fernandez, “POSACC: Position-Accuracy Based Adaptive Beaconing Algorithm for Cooperative Vehicular Safety Systems,” IEEE Access, vol. 8, pp. 15484–15501, 2020.
  • E. Inga, R. Hincapié, and S. Céspedes, “Capacitated Multicommodity Flow Problem for Heterogeneous Smart Electricity Metering Communications Using Column Generation,” Energies, vol. 13, no. 1, p. 97, 2020.
2019
  • *A. Yáñez, S. Céspedes, J. Rubio-Loyola, “A Baseline for Context-aware Safety Messages Dissemination in VANETs,” Revista Facultad de Ingeniería Universidad de Antioquia, n. 93, pp. 9–18, Dec 2019.
  • *A. Arteaga, S. Céspedes, C. Azurdia-Meza, “Vehicular communications over TV White Spaces in the presence of Secondary Users,” IEEE Access, vol. 7, pp. 53496–53508, Apr 2019.
  • *T. Ferrer, S. Céspedes, A. Becerra, “Review and Evaluation of MAC Protocols for Satellite IoT Systems Using Nanosatellites,” Sensors, vol. 19, no. 8, p. 1947, Apr 2019.
Previous years
  • S. Céspedes, J. Salamanca, *A. Yáñez, D. Vinasco, “Group Cycling meets Technology: A Cooperative Cycling Cyber-physical System,” IEEE Transactions on Intelligent Transportation Systems, vol. 20, no. 8, pp. 3178–3188, Dec 2018.
  • E. Inga, S. Céspedes, R. Hincapié, *C. A. Cárdenas, “Scalable Route Map for Advanced Metering Infrastructure Based on Optimal Routing of Wireless Heterogeneous Networks,” IEEE Wireless Communications, vol. 24, no. 2, pp. 26–33, Apr 2017.
  • C. Estévez, C. Azurdia, S. Céspedes, “Overcoming Intrinsic Losses with a Physical-Transport Cross-Layer Control System for Low-SNR Links,” IEEE Communications Letters, vol. 19, no. 12, pp. 2094–2097, Dec 2015.
  • S. Céspedes, X. (Sherman) Shen, “On Achieving Seamless IP Communications in Heterogeneous Vehicular Networks,” IEEE Transactions on Intelligent Transportation Systems, vol. 16, no. 6, pp. 3223–3237, Dec 2015.
  • *A. Orozco, S. Céspedes, R. Michoud, G. Llano, “Design and Simulation of a Collision Notification Application with Geocast Routing for Car-to-Car Communications,” European Transport Research Review, vol. 7(4), p. 36, Oct 2015.
  • *D. F. Ramírez, S. Céspedes, “Routing in Neighborhood Area Networks: A Survey in the Context of AMI Communications,” Journal of Network and Computer Applications, vol. 55, pp. 68–80, Sep 2015.
  • S. Céspedes, S. Taha, X. (Sherman) Shen, “A Multi-hop Authenticated Proxy Mobile IP Scheme for Asymmetric VANET,” IEEE Transactions on Vehicular Technology, vol. 62, no. 7, pp. 3271–3286, Sept 2013.
  • S. Céspedes, N. Lu, X. (Sherman) Shen, “VIP-WAVE: On the Feasibility of IP Communications in 802.11p Vehicular Networks,” IEEE Transactions on Intelligent Transport Systems, vol. 14, no. 1, pp. 82–97, Mar 2013.
  • S. Céspedes, X. (Sherman) Shen, C. Lazo, “IP Mobility Management for Vehicular Communication Networks: Challenges and Solutions,” IEEE Communications Magazine — Topics in automotive networking, vol. 49, no. 5, pp. 187–194, May 2011.

Peer-reviewed Conferences

2025
  • *J. Gerard, J. A. Fraire, S. Céspedes, "Modeling Pointing, Acquisition, and Tracking Delays in Free-Space Optical Satellite Networks," 2025 IEEE International Conference on Wireless for Space and Extreme Environments (WiSEE), Halifax, Canada, 2025, pp. 1–6. Best Paper Award.
  • *D. C. Bonilla, C. Lozano-Garzon, S. Céspedes, H. Castro, "GEMINIS Observability Module: Monitoring the Environmental Sustainability of IoT Infrastructures," World Conference on Information Communication Systems, Software, Security and Sustainability (WorldS4 2025), Lecture Notes in Networks and Systems (in press), London, UK, 2025.
  • *M. Hatami, S. Céspedes, J. W. Atwood, "A Framework for Secure Autonomic IoT Device Management in Constrained Networks," Proceedings of the 2025 Applied Networking Research Workshop (ANRW '25), ACM, New York, NY, USA, 2025, pp. 150–156.
  • *J. I. Sandoval, J. S. Sidhu, S. Céspedes, A. Bentaleb, "QUIC Adaptive Video Streaming Performance with 5G RAN Queue Management," 2025 IEEE International Mediterranean Conference on Communications and Networking (MeditCom), Nice, France, 2025, pp. 1–6.
  • *P. Ilabaca, *D. Maldonado, J. A. Fraire, S. Montejo, S. Céspedes, "Network Size Estimation in DtS-IoT: A LoRaWAN Approach for Satellite Constellations," 2025 IEEE International Conference on Communications (ICC), Montréal, QC, Canada, 2025, pp. 5506–5511.
2024
  • *J. Gerard, *A. Ibrahim, J. A. Fraire, S. Céspedes, "Autonomous Max-Flow Interplanetary Laser Link Scheduling for Martian Exploration," 2024 IEEE International Conference on Wireless for Space and Extreme Environments (WiSEE), Daytona Beach, USA, 2024, pp. 70–75.
  • *D. C. Bonilla Verdugo, C. A. Lozano-Garzón, S. Céspedes, H. Castro, "GEMINIS – Green Evaluation Methodology for IoT and Network Infrastructure Sustainability," 2024 IEEE International Conference on Internet of Things and Intelligence Systems (IoTaIS), Bali, Indonesia, 2024, pp. 14–18.
  • *J. Gerard, J. A. Fraire, *R. Ortigueira, S. Céspedes, "DtS-IoT Resource Allocation Analysis Framework: Assessing DQ and RESS-IoT," 2024 IEEE 10th World Forum on Internet of Things (WF-IoT), Ottawa, ON, Canada, 2024, pp. 672–677.
  • *J. Gerard, J. A. Fraire, S. Céspedes, "Unlocking DtS-IoT Medium Access Through the Massively Scalable Distributed Queuing Protocol," 2024 IEEE 10th World Forum on Internet of Things (WF-IoT), Ottawa, ON, Canada, 2024, pp. 840–845.
  • *R. Muñoz-Lara, S. Céspedes, M. Díaz, "SCHC Over DtS-IoT: Performance of SCHC Confirmation Modes in Satellite IoT," 2024 IEEE 10th World Forum on Internet of Things (WF-IoT), Ottawa, ON, Canada, 2024, pp. 678–683.
  • *J. Sandoval, S. Céspedes, "Work in Progress: Congestion Control in mmWave Fluctuating Scenarios in 5G-A/6G," 2024 IEEE 10th World Forum on Internet of Things (WF-IoT), Ottawa, ON, Canada, 2024, pp. 571–573.
  • *J. Sandoval, S. Céspedes, A. Gonzalez, D. Torreblanca, I. Bugueño-Córdova, "A Deep Dive into Congestion Control and Buffer Management for Fluctuation-Prone 5G-A/6G Links," 2024 7th Conference on Cloud and Internet of Things (CIoT), Montréal, QC, Canada, 2024, pp. 1–8.
  • *J. Gerard, S. Céspedes, "Sailing the Cosmic Seas: Improving Dependability in IoT-Based Deep Space Exploration," 2024 6th International Conference on Communications, Signal Processing, and their Applications (ICCSPA), Istanbul, Turkiye, 2024, pp. 1–3. Winners List — IEEE ComSoc Challenge.
  • *F. Medina, O. Montañez, *C. Suancha, E. Avendaño, S. Céspedes, "Evaluating Propagation Models for IIoT in Underground Mining: An Experimental Comparative Study in Underground Coal Mines," 2024 IEEE ANDESCON, Cusco, Peru, 2024, pp. 1–6.
  • S. I. Montoya, D. Maldonado, J. A. Fraire, S. Céspedes, "On the Role of Delay Tolerant Networks and Contact Graph Routing in Direct-to-Satellite IoT," 2024 IEEE 10th International Conference on Space Mission Challenges for Information Technology (SMC-IT) & Space Computing Conference (SCC), Mountain View, CA, USA, 2024, pp. 151–160.
  • *J. Gerard, *D. C. Bonilla, A. Bentaleb, S. Céspedes, "Optimizing Quality and Energy Efficiency in WebRTC with ML-Powered Adaptive FEC," 2024 IEEE International Conference on Multimedia and Expo Workshops (ICMEW), Niagara Falls, ON, Canada, 2024, pp. 1–6.
2023
  • *J. Sandoval, S. Céspedes, "Performance Evaluation of Congestion Control Over B5G/6G Fluctuating Scenarios," Proceedings of the Int'l ACM Symposium on Design and Analysis of Intelligent Vehicular Networks and Applications (DIVANet '23), New York, NY, USA, 2023, pp. 85–92.
  • *A. Yáñez, S. Céspedes, C. Azurdia-Meza, "Know Your Vulnerable Neighbors: Awareness Model for 5G C-V2X Communications Mode 2," Proceedings of the Int'l ACM Symposium on Design and Analysis of Intelligent Vehicular Networks and Applications (DIVANet '23), New York, NY, USA, 2023, pp. 85–92.
  • *D. Maldonado, J. A. Fraire, *P. Ilabaca, H. Rivano, S. Céspedes, "Network Size Estimation for LoRa-Based Direct-to-Satellite IoT," 2023 IEEE Cognitive Communications for Aerospace Applications Workshop (CCAAW), Cleveland, OH, USA, 2023, pp. 1–6.
2022
  • *D. S. Wistuba La-Torre, S. Céspedes, J. Bustos-Jiménez, "Modeling SCHC ACK-on-Error Fragment Delivery over Sigfox," Proceedings of the 18th ACM International Symposium on QoS and Security for Wireless and Mobile Networks (Q2SWinet '22), New York, NY, USA, 2022, pp. 115–119.
2021 and earlier
  • *D. Moreira, *K. Wagemann, S. Céspedes, "IPv6 Neighbor Discovery for Vehicular Networks," 50 Jornadas Argentinas de Informática (JAIIO) – IETF Day 2021, Argentina, 2021, pp. 1–15.
  • *J. Sandoval, S. Céspedes, "Performance Evaluation of IEEE 802.11ax for Residential Networks," 2021 IEEE Latin-American Conference on Communications (LATINCOM), Santo Domingo, Dominican Republic, 2021, pp. 1–7.
  • *P. Ilabaca, S. Céspedes, S. Montejo-Sánchez, "Network Size Estimation in Direct-to-Satellite IoT," 2021 IEEE 8th International Conference on Space Mission Challenges for Information Technology (SMC-IT), Virtual Conference, 2021, pp. 107–111.
  • *T. Nuñez, J. Lopez, S. Montejo, C. Azurdia, S. Céspedes, "Analysis of Channel Models for LoRa-based Direct-to-Satellite IoT Networks Served by LEO Nanosatellites," ICC – 2nd Workshop on Internet of Mobile Things, Virtual Conference, Montréal, Canada, 2021, pp. 1–6.
  • *A. Yáñez, S. Céspedes, "Pedestrians Also Have Something to Say: Integration of Connected VRU in Bidirectional Simulation," IEEE Vehicular Networking Conference (VNC), Online, 2020, pp. 1–4.
  • *A. Arteaga, P. Palacios Játiva, S. Céspedes, C. Azurdia-Meza, "Evaluation of Opportunistic Access Strategies for Vehicular Networking Over TVWS," 2020 IEEE 92nd Vehicular Technology Conference (VTC-Fall 2020), Victoria, BC, Canada, 2020, pp. 1–5.
  • *P. Ortega, S. Céspedes, S. Montejo-Sánchez, "Increasing Safety at Vehicular Intersections with a Controlled Retransmission of Beacons," 2020 IEEE Colombian Conference on Communications and Computing (COLCOM), Cali, Colombia, 2020, pp. 6–11.
  • *D. Londoño, S. Céspedes, J. Bustos, "Analysis and Evaluation of HTTP/2 Flow Control Algorithm for IoT," 2020 IEEE Colombian Conference on Communications and Computing (COLCOM), Cali, Colombia, 2020, pp. 12–15.
  • Ortiz-Guerra, M. O. Rojas, S. Montejo-Sánchez, R. D. Souza, C. A. Azurdia-Meza, S. Céspedes, "On MAC Protocols Performance for M2M Communications," 2020 IEEE Colombian Conference on Communications and Computing (COLCOM), Cali, Colombia, 2020, pp. 1–5.
  • *T. Lara, O. Cartagena, S. Céspedes, D. Sáez, "Robust Model Based Predictive Control for a Cooperative Cycling Cyber-Physical System," 2019 IEEE CHILECON, Valparaíso, Chile, 2019, pp. 1–6.
  • *R. Muñoz Lara, S. Céspedes, A. Hafid, "Understanding and Characterizing Transmission Times for Compressed IP packets over LoRaWAN," 2019 IEEE Latin-American Conference on Communications (LATINCOM), Salvador, Brazil, 2019, pp. 1–6.
  • P. P. Játiva, C. A. Azurdia-Meza, M. R. Cañizares, S. Céspedes, S. Montejo-Sánchez, "Performance Enhancement of VLC-Based Systems Using Diversity Combining Schemes in the Receiver," 2019 IEEE Latin-American Conference on Communications (LATINCOM), Salvador, Brazil, 2019, pp. 1–6.
  • J. A. Fraire, S. Céspedes, N. Accettura, "Direct-To-Satellite IoT – A Survey of the State of the Art and Future Research Perspectives," ADHOC-NOW 2019, Lecture Notes in Computer Science, vol. 11803, Springer, Luxembourg, 2019, pp. 241–258.
  • H. Kang, S. Montejo-Sánchez, C. A. Azurdia-Meza, S. Céspedes, "Beamforming for Beaconing in V2V Communications," 2019 IEEE INTERCON, Lima, Peru, 2019, pp. 1–4.
  • *S. Torres, S. Céspedes, J. Bustos-Jiménez, M. Serrano, "IoT Solutions for Sustainable Cities: An Online Adaptation for the Driver Intent Inference Algorithm," 2019 IEEE 5th World Forum on Internet of Things (WF-IoT), Limerick, Ireland, 2019, pp. 967–972.
  • V. Matus, C. A. Azurdia-Meza, S. Céspedes, *P. Ortiz-Guerra, S. Montejo-Sánchez, J. Rojas, I. Soto, "Implementation of a Low-Cost Vehicular VLC System and CAN Bus Interface," 2018 IEEE/IET CSNDSP, Budapest, Hungary, 2018, pp. 57–60.
  • E. Inga, M. Campaña, R. Hincapié, S. Céspedes, "Optimal Placement of Data Aggregation Points for Smart Metering Using Wireless Heterogeneous Networks," 2018 IEEE COLCOM, Medellín, Colombia, 2018, pp. 1–6.
  • *J. S. Sánchez-Mahecha, S. Céspedes, J. Bustos-Jiménez, "QoS Evaluation of the Future High Efficiency IEEE 802.11ax WLAN Standard," 2018 IEEE COLCOM, Medellín, Colombia, 2018, pp. 31–33.
  • *A. Yáñez, S. Céspedes, J. Rubio, "CASSaM: Context-aware System for Safety Messages Dissemination in VANETs," 2018 IEEE COLCOM, Medellín, Colombia, 2018, pp. 1–6.
  • *S. Bolufé, S. Montejo-Sánchez, C. A. Azurdia-Meza, S. Céspedes, R. Demo Souza, E. M. García, "Dynamic Control of Beacon Transmission Rate and Power with Position Error Constraint in Cooperative Vehicular Networks," 33rd ACM/SIGAPP Symposium on Applied Computing (SAC), Pau, France, 2018, pp. 2084–2091.
  • *S. Bolufé, C. A. Azurdia-Meza, S. Céspedes, S. Montejo-Sánchez, R. Demo Souza, E. M. G. Fernandez, C. Estevez, "Dynamic Beaconing Using Probability Density Functions in Cooperative Vehicular Networks," VEHITS 2018, Madeira, Portugal, 2018, pp. 636–642.
  • *P. Ortega, S. Céspedes, *S. Bolufé, C. Azurdia, "Experimental Evaluation of Adaptive Beaconing for Vehicular Communications," ADVANCEs Workshop, Santiago, Chile, 2018, pp. 1–4.
  • S. Montejo-Sánchez, C. Azurdia-Meza, *S. Bolufé, S. Céspedes, I. Soto, R. Demo Souza, "Novel Channel Hopping Sequence Approaches to Rendezvous for VANETs," 2017 IEEE CHILECON, Pucón, Chile, 2017, pp. 1–6.
  • *F. Valle, S. Céspedes, "Improving Vehicular Applications Through Network Diversity," 2016 IEEE LATINCOM, Medellín, Colombia, 2016, pp. 1–6.
  • S. Céspedes, J. Salamanca, *A. Yañez, C. Rivera, *J. C. Sacanamboy, "Platoon-Based Cyclists Cooperative System," 2015 IEEE Vehicular Networking Conference (VNC), Kyoto, Japan, 2015, pp. 112–118.
  • C. Estévez, S. Céspedes, "Improving Performance of TCP-Based Applications in Power Line Communications for Smart Grids," 2015 IEEE LATINCOM, Arequipa, Peru, 2015, pp. 1–6.
  • Falcheti, C. Azurdia, S. Céspedes, "Vehicular Cloud Computing in the Dawn of 5G," 2015 IEEE CHILECON, Santiago, Chile, 2015, pp. 301–305.
  • *D. F. Ramírez, S. Céspedes, C. Becerra, C. Lazo, "Performance Evaluation of Future AMI Applications in Smart Grid Neighborhood Area Networks," 2015 IEEE COLCOM, Popayán, Colombia, 2015, pp. 1–6.
  • C. Lazo, P. Gallardo, S. Céspedes, "A Bridge Structural Health Monitoring System Supported by the Internet of Things," 2015 IEEE COLCOM, Popayán, Colombia, 2015, pp. 1–6.
  • G. Ulloa, N. Villegas, S. Céspedes, M. Ayala, A. Ramírez, "An Approach to the Implementation Process of CDIO," 10th International CDIO Conference, Barcelona, Spain, 2014, pp. 1–6.
  • P. Ernest, H. A. Chan, O. E. Falowo, L. A. Magagula, S. Céspedes, "Network-Based Distributed Mobility Management for Network Mobility," IEEE CCNC, Las Vegas, USA, 2014, pp. 1–6.
  • N. Alsharif, S. Céspedes, X. (Sherman) Shen, "iCAR: Intersection-Based Connectivity Aware Routing in Vehicular Ad Hoc Networks," IEEE ICC, Budapest, Hungary, 2013, pp. 1–5.
  • S. Céspedes, X. (Sherman) Shen, "Enabling Relay-Aided IP Communications in 802.11p/WAVE Networks," IEEE GLOBECOM, Anaheim, USA, 2012, pp. 1–6.
  • S. Taha, S. Céspedes, X. (Sherman) Shen, "EM3A: Efficient Mutual Multi-Hop Mobile Authentication Scheme for PMIP Networks," IEEE ICC, Ottawa, Canada, 2012, pp. 1–6.
  • *D. Ramírez, S. Céspedes, "Evaluation of Mesh-Under and Route-Over Routing Strategies in AMI Systems," IEEE COLCOM, Cali, Colombia, 2012, pp. 1–6.
  • S. Céspedes, A. Cárdenas, T. Iwao, "Comparison of Data Forwarding Mechanisms for AMI Networks," IEEE ISGT, Washington, USA, 2012, pp. 1–6.
  • S. Céspedes, X. (Sherman) Shen, "A Framework for Ubiquitous IP Communications in Vehicle to Grid Networks," IEEE GLOBECOM Workshops (UbiCoNet), Houston, USA, 2011, pp. 1–6.
  • M. Asefi, S. Céspedes, X. (Sherman) Shen, J. Mark, "A Seamless Quality-Driven Multi-Hop Data Delivery Scheme for Video Streaming in Urban VANET Scenarios," IEEE ICC, Kyoto, Japan, 2011, pp. 1–5.
  • S. Céspedes U., X. (Sherman) Shen, "An Efficient Hybrid HIP-PMIPv6 Scheme for Seamless Internet Access in Urban Vehicular Scenarios," IEEE GLOBECOM, Miami, USA, 2010, pp. 1–6.

Standards

RFCs
  • RFC 9441: J-C Zúñiga, C. Gomez, S. Aguilar, L. Toutain, S. Céspedes, *D. S. Wistuba La Torre, J. Boite, "Static Context Header Compression (SCHC) Compound Acknowledgement (ACK)", July 2023. https://www.rfc-editor.org/info/rfc9441
  • RFC 9442: J-C Zúñiga, C. Gomez, S. Aguilar, L. Toutain, S. Céspedes, *D. S. Wistuba La Torre, J. Boite, "Static Context Header Compression (SCHC) over Sigfox Low-Power Wide Area Network (LPWAN)", July 2023. https://www.rfc-editor.org/info/rfc9442
  • RFC 9635: J. Jeong (Ed.), N. Benamar, S. Céspedes, J. Harri, D. Liu, T. Oh, C. Perkins, A. Petrescu, Y. Shen, M. Wetterwald, "IPv6 Wireless Access in Vehicular Environments (IPWAVE): Problem Statement and Use Cases", March 2023. https://www.rfc-editor.org/info/rfc9365
  • RFC 6971: U. Herberg, A. Cardenas, T. Iwao, M. Dow, S. Céspedes, "Depth-First Forwarding (DFF) in Unreliable Networks", June 2013. https://www.rfc-editor.org/info/rfc6971
Internet-Drafts
  • *R. Munoz-Lara, S. Céspedes, "Static Context Header Compression and Fragmentation over Direct-to-Satellite IoT", IETF Internet-Draft, Work in Progress, 21 pp., Sep. 9, 2025. Available: https://datatracker.ietf.org/doc/draft-munoz-schc-over-dts-iot
  • D. Migault, *M. Hatami, D. Liu, P. Stere, J. W. Atwood, S. Céspedes, T. Guggemos, and D. Schinazi, "Internet Key Exchange version 2 (IKEv2) extension for Header Compression Profile (HCP)", IETF Internet-Draft, Work in Progress (WG Last Call), 15 pp., Aug. 21, 2025. Available: https://datatracker.ietf.org/doc/draft-ietf-ipsecme-ikev2-diet-esp-extension
  • D. Migault, *M. Hatami, S. Céspedes, J. W. Atwood, D. Liu, T. Guggemos, C. Bormann, and D. Schinazi, "ESP Header Compression with Diet-ESP", IETF Internet-Draft, Work in Progress (WG Last Call), 44 pp., Aug. 17, 2025. Available: https://datatracker.ietf.org/doc/draft-ietf-ipsecme-diet-esp
  • E. Ramos, L. Corneo, A. Minaburo, *R. Munoz-Lara, S. Céspedes, "Static Context Header Compression and Fragmentation over networks prone to disruptions", IETF Internet-Draft, Work in Progress, 25 pp., Jun. 4, 2025. Available: https://datatracker.ietf.org/doc/draft-ietf-schc-over-networks-prone-to-disruptions

Posters and Demos

2024
  • *C. Suancha, O. Montañez, *F. Medina, E. Avendaño, S. Céspedes, "True Rays Model Integration in OMNeT for IIoT Network Planning in Underground Mines," 2024 1st IEEE Latin American Conference on Antennas & Propagation, Cartagena, Colombia, 2024, pp. 1–2.
  • *J. Gerard, J. A. Fraire, S. Céspedes, "Unlocking DtS-IoT Medium Access Through the Massively Scalable Distributed Queuing Protocol," Poster session at the 2024 IEEE 10th World Forum on Internet of Things (WF-IoT), Ottawa, ON, Canada, 2024, pp. 840–845.
  • M. Schrapel, J. Salamanca, S. Céspedes, A. Vinel, *A. Yáñez, "First Workshop on Connected Micromobility for Safe and Sustainable Communities," In Adjunct Proceedings of the AutomotiveUI '24 Adjunct, ACM, New York, NY, USA, 2024, pp. 235–237.
2020
  • *E. Carrasco, *R. Muñoz, S. Céspedes, "Guidance on LPWAN Technology Selection Based on IoT Applications Requirements," V School on Systems and Networks (SSN 2020), CEUR Workshop Proceedings, Vitoria, Brazil, 2020, pp. 28–31.
  • *D. Wistuba, S. Céspedes, J. C. Zúñiga, R. Muñoz, S. Aguilar, C. Gomez, R. Vidal, "An Implementation of IoT LPWAN SCHC Message Fragmentation and Reassembly," V School on Systems and Networks (SSN 2020), CEUR Workshop Proceedings, Vitoria, Brazil, 2020, pp. 6–9.
2018
  • A. Becerra, *T. Ferrer, S. Céspedes, "A Novel MAC Protocol for Communication Between LEO Satellites and Large Groups of Sensors Intended for IoT," Poster Session, Small Satellite Conference, Utah, USA, 2018.
  • *P. Ortega, *S. Bolufé, S. Céspedes, C. A. Azurdia-Meza, S. Montejo, F. Maciel-Barboza, "Connectivity Improvement in Urban Intersections Obstructed by Buildings Using RSUs," IV School on Systems and Networks (SSN 2018), CEUR Workshop Proceedings, vol. 2178, Valdivia, Chile, 2018, pp. 42–45.
  • *T. Ferrer, S. Céspedes, A. Becerra, "Evaluation of MAC Protocols for IoT Satellite Systems," IV School on Systems and Networks (SSN 2018), CEUR Workshop Proceedings, vol. 2178, Valdivia, Chile, 2018, pp. 57–60.
  • *T. Lara, *A. Arteaga, S. Céspedes, "Comparison of Path Loss Models for Vehicular Communications in TV White Spaces," IV School on Systems and Networks (SSN 2018), CEUR Workshop Proceedings, vol. 2178, Valdivia, Chile, 2018, pp. 33–36.
  • *J. Sánchez, S. Céspedes, "Proposal for an Intelligent Distribution Model of DNS Queries According to Time Zones," IV School on Systems and Networks (SSN 2018), CEUR Workshop Proceedings, vol. 2178, Valdivia, Chile, 2018, pp. 37–41.
  • *S. Torres, S. Céspedes, "Proposal for Architecture and Simulated Implementation of an Early Warning System for Cyclists Based on Right Turn Predictions of Vehicles," IV School on Systems and Networks (SSN 2018), CEUR Workshop Proceedings, vol. 2178, Valdivia, Chile, 2018, pp. 46–49.
  • *A. Arteaga, S. Céspedes, C. Azurdia-Meza, "Next Generation Vehicular Communications via Interworking of DSRC and TV White Space," ANTEM 2018, Waterloo, ON, Canada, 2018, pp. 1–2.
2017
  • *D. Londoño, M. González, S. Céspedes, J. Bustos, G. Montenegro, "Performance Evaluation of HTTP/2 Window Size in the Internet of Things," III Spring School on Networks, Pucón, Chile, 2017, pp. 31–33.
  • M. González Mendoza, *B. Holloway, A. Hevia, S. Céspedes, J. Bustos, "Coordination of Autonomous Vehicles at Intersections with V2V Communication," III Spring School on Networks, Pucón, Chile, 2017, pp. 38–41.
  • *S. Bolufé, S. Montejo-Sánchez, C. Azurdia-Meza, S. Céspedes, R. Demo Souza, Martin Garcia Fernandez, "Dynamic Control of Beacon Transmission Rate with Position Accuracy in Vehicular Networks," III Spring School on Networks, Pucón, Chile, 2017, pp. 31–33.
  • *A. Yáñez, S. Céspedes, J. Rubio, "Towards a Context-aware Dissemination Mechanism for Vehicular Networks," III Spring School on Networks, Pucón, Chile, 2017, pp. 34–37.
2016
  • J. Salamanca, S. Céspedes, D. Vinasco, *A. Yañez, "Demo: A Prototype for a Platoon-Based Cyclist Cooperative System," 2016 IEEE Vehicular Networking Conference (VNC), Columbus, OH, USA, 2016, pp. 1–2.
  • *F. Valle, S. Céspedes, "Enhancing Vehicular Applications by Exploiting Network Diversity," II Spring School on Networks, Santiago, Chile, 2016, pp. 32–34.
  • *D. Londoño, S. Céspedes, "Performance Evaluation of CoAP and HTTP/2 in Web Applications," II Spring School on Networks, Santiago, Chile, 2016, pp. 25–27.
  • *A. Arteaga, S. Céspedes, C. Azurdia, "Spectrum Sensing for Vehicular Dynamic Spectrum Access," II Spring School on Networks, Santiago, Chile, 2016, pp. 8–13.
2014
  • S. Céspedes, J. Salamanca, *J. C. Sacanamboy, C. Rivera, "Poster: Smart Networked Bicycles with Platoon Cooperation," 2014 IEEE Vehicular Networking Conference (VNC), Paderborn, Germany, 2014, pp. 199–200. Best Poster Award.

Complete list

Teaching activities

Concordia University

Undergrad courses

  • COMP 445: Data Communications and Computer Networks
  • SOEN 422: Embedded Systems and Software

Graduate courses

  • COMP 6461: Computer Networks and Protocols
  • COMP 7251: Mobile Computing and Wireless Networks

Previous institutions

Universidad de Chile (2014-2021)

Undergraduate courses

  • EL4107: Information and Communications Technologies
  • EL5207: Laboratory of Information and Communications Technologies
  • IN4529: Design of technological projects with the Internet of Things
  • EL6048: Product development with the Internet of Things
Graduate courses

  • EL7044: Advanced concepts in Wireless Networking
  • EL7950: Collaborative research

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