Ubiquitous networks sustain the development of numerous paradigms/technologies such as distributed ambient intelligence, Internet of Things, Tactile Internet, Internet of Skills, context-awareness, cloud computing, wearable devices, and future mobile networking (e.g., B5G and 6G). Various domains are then impacted by such a system, one cite security and monitoring, energy efficiency and environment protection, e-health, precision agriculture, intelligent transportation, home-care (e.g., for elderly and disabled people), etc. Communication in such a system has to cope with many constraints (e.g., limited capacity resources, energy depletion, strong fluctuations of traffic, Real-time constraint, dynamic network topology, radio link breakage, interferences, etc.) and has to meet the new application requirements. Ubiquitous systems bring many promising paradigms aiming to deliver significantly higher capacity to meet the huge growth of mobile data traffic and to accommodate efficiently dense and ultra-dense systems. A crucial challenge is that ubiquitous networks should be engineered to better support existing and emerging applications including broadband multimedia, machine-to-machine applications, Internet of things, sensors and RFID technologies. Many of these systems require stringent Quality of Service including better latency, reliability, higher spectral and energy efficiency, but also some Quality of Experience and Quality of Context constraints.