Wearable-Based System For The Ubiquitous Tracking Of Vulnerable People In Remote Areas - Perez-Rubio, M.C.; Quintanar-Pascual, J.; Garcia-Requejo, A.; Villadangos-Carrizo, J.M.; Garcia-Dominguez, J.J.; Marnane, L. (International Congress on Ultra Modern Telecommunications and Control Systems and Workshops, 2023)