Browsing by Author "Céspedes Umaña, Sandra Lorena"

Now showing items 1-5 of 5

    • Direct-to-satellite IoT slotted aloha systems with multiple satellites and unequal erasure probabilities 
      Tondo, Felipe Augusto; Montejo Sánchez, Samuel; Pellenz, Marcelo Eduardo; Céspedes Umaña, Sandra Lorena; Souza, Richard Demo (MDPI, 2021)
      Direct-to-satellite Internet of Things (IoT) solutions have attracted a lot of attention from industry and academia recently, as promising alternatives for large scale coverage of a massive number of IoT devices. In this ...
    • Impact of safety message generation rules on the awareness of vulnerable road users 
      Lara, Tomás; Yáñez, Alexis; Céspedes Umaña, Sandra Lorena; Hafid, Abdelhakim Senhaji (MDPI, 2021)
      In the face of cooperative intelligent transportation systems (C-ITS) advancements, the inclusion of vulnerable road users (VRU), i.e., pedestrians, cyclists, and motorcyclists, has just recently become a part of the ...
    • RESS-IoT: A scalable energy-efficient MAC protocol for direct-to-satellite IoT 
      Ortigueira Ruiz, Raydel; Fraire, Juan Andrés; Becerra, Alex; Ferrer, Tomás; Céspedes Umaña, Sandra Lorena (IEEE-Inst Electrical Electronics Engineers, 2021)
      The Internet of Things (IoT) is enabling unprecedented applications based on the transport of small data volumes to and from constrained devices. When end devices or sensor nodes are located in very remote zones with ...
    • Special issue on cybertwin-driven 6G: architectures, methods, and applications 
      Yu, Quan; Wang, Miao; Zhou, Haibo; Ni, Jianbing; Chen, Jiacheng; Céspedes Umaña, Sandra Lorena (IEEE-Inst Electrical Electronics Engineers, 2021)
    • Uplink transmission policies for lora-based Direct-to-Satellite Iot 
      Álvarez, Guido; Fraire, Juan Andrés; Abdelfadeel Hassan, Khaled; Céspedes Umaña, Sandra Lorena; Pesch, Dirk (IEEE-Inst Electrical Electronics Engineers, 2022)
      Direct-to-Satellite IoT (DtS-IoT) is a promising approach to deliver data transfer services to IoT devices in remote areas where deploying terrestrial infrastructure is not appealing or feasible. In this context, low-Earth ...