Aplicação de técnicas sociais de ambientes SIoV para apoiar a disseminação de eventos emergenciais com qualidade de experiência

Abstract

The support and daily treatment of critical events in cities are among the significant challenges of urban centers. Such events can negatively impact the proper functioning of cities and cause physical and material damage to the population. Because of that, it is necessary to promptly notify the competent authority to take appropriate actions efficiently and thus mitigate the effects of the event. The Vehicular Ad-hoc Networks (VANETs) are an alternative to support the notification of information about emergency events due to the ubiquity of vehicles in cities. The vehicles with embedded cameras and sensors can assist in event detection. Although the dynamicity of the VANETs compromises the communication, the social relationships between vehicle drivers establish local communities, which can support public authorities in the treatment of events by employing social intelligence in the data collected by the VANET. Thus, this dissertation proposes SOCIABLE (SOCial monItoring and disseminateAtion of urBan criticismL Events), a robust data dissemination system for urban critical events that operates in a Social Internet of Vehicles (SIoV) network. The SOCIABLE takes into account the relationships established between vehicles with common interests or routines to create local communities. It also applies social techniques to perform an intelligent selection of relays to carry out targeted dissemination (multicast) in order to expedite data delivery, thus helping the event handling. An evaluation made through the NS-3 simulator showed the effectiveness of the SOCIABLE in carrying out the monitoring, dissemination, and delivery of data from events detected in different traffic contexts in a faster manner and with less computational resources than a system that does not employ social parameters. We also analyzed the quality of experience obtained with the social strategies employed by SOCIABLE, where the strategies with friendship and social activity allowed a video delivery with better resolution in different traffic contexts.