22 documents found, page 1 of 3
Enhancing VRUs safety with V2P communications: an experiment with hidden pedest...
Gonçalves, Fábio Raul Costa; Ribeiro, Bruno Daniel Mestre Viana; Simões, João Henrique Vivas Santos; Gama, Óscar Sílvio Marques AlmeidaVehicular Ad hoc Networks (VANETs) are the network that enables communications between road entities, such as vehicles, Road Side Units (RSUs), or Vulnerable Road Users (VRUs). The work presented in this paper aims to provide a methodology to prevent accidents that happen to VRUs' entities, more precisely, to pedestrians. The goal of this safety application use-case is to detect and warn the involved parties of...
Agnostic middleware for VANETs: specification, implementation and testing
Gonçalves, Fábio Raul Costa; Ribeiro, Bruno Daniel Mestre Viana; Gama, Óscar Sílvio Marques Almeida; Nicolau, Maria João; Dias, Bruno; Costa, AntónioVehicular Ad hoc Networks (VANETs) are the basic support for Intelligent Transportation Systems (ITS), providing a framework for its multiple entities to communicate. The communications and services provided to the road entities are generally implemented by means of an On-Board Unit (OBU) and Road Side Unit (RSU), sharing a rather similar hardware and software architectures. These devices need to support multip...
Design and evaluation of an adaptive virtual traffic light system for VANETs
Gama, Óscar Sílvio Marques Almeida; Costa, António; Nicolau, Maria João; Santos, Alexandre; Macedo, Joaquim; Dias, Bruno; Gonçalves, Fábio Raul CostaIn the near future, virtual traffic light systems (VTLS) will contribute to improve the safety of vulnerable road users and the traffic fluidity in the intersections. This work implements and evaluates an adaptive VTLS algorithm, whereby intersections are negotiated dynamically in a safe and balanced way, so that drivers and pedestrians do not experience too long waiting times in the intersections. The proposed...
Evaluation of Broadcast Storm Mitigation Techniques on Vehicular Networks Enabl...
Gama, Óscar Sílvio Marques Almeida; Santos, Alexandre; Costa, António; Dias, Bruno; Macedo, Joaquim; Nicolau, Maria JoãoA vehicle in a vehicular ad-hoc network (VANET) can perform wireless broadcasting by flooding to find a route to a node or to send an emergency warning, for example. However, this is usually a very demanding operation because it may originate broadcast storms, with high impact on redundancy and collision of packets, as well as channel bandwidth waste. Diverse strategies have been proposed by the research commun...
Synthesizing datasets with security threats for vehicular ad-hoc networks
Gonçalves, Fábio Raul Costa; Ribeiro, Bruno Daniel Mestre Viana; Gama, Óscar Sílvio Marques Almeida; Simões, João Henrique Vivas Santos; Costa, AntónioVehicular Ad hoc Networks (VANETs) are the underlying network for all the communications between Intelligent Transportation System entities as, for example, Road Side Units, On-Board Units, etc. These networks are growing in size and interest from the automaker's industry, software companies and scientific researchers. The intrinsic technological nature of VANETs (based on a wireless shared medium) with no pred...
Public key certificate privacy in VoNDN: voice over named data networks
Dogruluk, Ertugrul; Gama, Óscar Sílvio Marques Almeida; Costa, António; Macedo, JoaquimNamed Data Network (NDN) is a network paradigm that attempts to answer today's needs for distribution. One of the NDN key features is in-network caching to increase content distribution and network efficiency. However, this feature may increase the privacy concerns, as the adversary may identify the call history, and the callee/caller location through side-channel timing responses from the cache of trusted Voic...
Evaluation of push and pull communication models on a VANET with virtual traffi...
Gama, Óscar Sílvio Marques Almeida; Santos, Alexandre; Costa, António; Nicolau, Maria João; Dias, Bruno; Macedo, JoaquimIt is expected in a near future that safety applications based on vehicle-to-everything communications will be a common reality in the traffic roads. This technology will contribute to improve the safety of vulnerable road users, for example, with the use of virtual traffic light systems (VTLS) in the intersections. This work implements and evaluates a VTLS conceived to help the pedestrians pass safely the inte...
A systematic review on intelligent intrusion detection Systems for VANETs
Gonçalves, Fábio Raul Costa; Ribeiro, Bruno Daniel Mestre Viana; Gama, Óscar Sílvio Marques Almeida; Santos, Alexandre; Costa, António; Dias, BrunoVehicular Ad hoc Networks (VANETs) are a growing area that continues to gain interest with an increasing diversity of applications available. These are the underlying network for Intelligent Transportation Systems (ITS), a set of applications and services that aim to provide greater security and comfort to drivers and passengers. However, the characteristics and size of a VANET make it a security challenge. It ...
Simulation and testing of a platooning cooperative longitudinal controller
Hapanchak, Vadym Serhiyovych; Costa, António; Macedo, Joaquim; Santos, Alexandre; Dias, Bruno; Nicolau, Maria João; Ribeiro, Bruno Daniel Mestre VianaPrevious studies have shown that the ITS solution called platooning allows the autonomous collaborative driving and can improve traffic safety and throughput. Traffic flow is optimized by Cooperative Adaptive Cruise Control (CACC), which allows for the automatic short-distance vehicle following, using inter-vehicle wireless communication in addition to onboard sensors. This paper presents the platooning vehicle...
Performance analysis of two machine-to-machine architecture types in vehicular ...
Araújo, Paulo Jorge Nicolau; Santos, Alexandre; Costa, António; Gonçalves, Fábio Raul Costa; Ribeiro, Bruno Daniel Mestre VianaA Vehicular Adhoc Network (VANET) is a conceptualisation that can be applied to the communications domain of an Intelligent Transportation System (ITS), where vehicles use On Board Units (OBU) to communicate with other vehicles or the road side infrastructure. The heterogeneity of the interconnected devices, the large number of devices inside and outside the vehicles and different degrees of device density, mak...