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- When backscatter communication meets vehicular networks: boosting crosswalk awarenessPublication . Pereira, Felisberto; Sampaio, Hugo; Chaves, Ricardo; Correia, Ricardo; Luís, Miguel; Sargento, Susana; Jordão, Marina; Almeida, Luís; Senna, Carlos; Oliveira, Arnaldo S. R.; Carvalho, Nuno BorgesThe research of safety applications in vehicular networks has been a popular research topic in an effort to reduce the number of road victims. Advances on vehicular communications are facilitating information sharing through real time communications, critical for the development of driving assistance systems. However, the communication by itself is not enough to reach the most desired target as we need to know which safety-related information should be disseminated. In this work, we bring passive sensors and backscatter communication to the vehicular network world. The idea is to increase the driver (or vehicle) awareness regarding the presence of pedestrians in a crosswalk. Passive sensors and backscatter communication technologies are used for the pedestrians’ detection phase, while the vehicular network is used during the dissemination of the detection information to surrounding vehicles. The proposed solution was validated through end-to-end experimentation, with real hardware and in a real crosswalk with real pedestrians and vehicles, demonstrating its applicability.
- On the performance of 5G for cloud- and edge-based emergency services in smart citiesPublication . Perna, Gonçalo; Rosmaninho, Rodrigo; Sampaio, Hugo; Rito, Pedro; Luís, Miguel; Sargento, SusanaThe deployment of emergency services in a city scenario, such as the ones for users’ safety in the roads, require the support of fast network technologies and efficient network architectures. Moreover, these services need to be available city-wide, so a flexible approach is needed to deploy high-speed technology to the overall city.This paper addresses the performance of 5G technology and its architecture to deploy emergency services with strict requirements, when compared to the use of fiber throughout the city. It considers the location of demanding services, in this specific case the people detection in the road through video cameras, both in the edge and the cloud, and with both fiber and real 5G connection between the edge and the cloud. We evaluate this architecture in a real scenario with real users and vehicles in the area. The obtained results show that 5G with an edge-based approach can provide similar services to fiber-based connections to the cloud.