References of "Alonso-Zarate, Jesus"
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See detailEnabling SDN in VANETs: What is the Impact on Security?
Di Maio, Antonio UL; Palattella, Maria Rita UL; Soua, Ridha UL et al

in Sensors (2016), 16(12), 2077

The demand for safe and secure journeys over roads and highways has been growing at a tremendous pace over recent decades. At the same time, the smart city paradigm has emerged to improve citizens’ ... [more ▼]

The demand for safe and secure journeys over roads and highways has been growing at a tremendous pace over recent decades. At the same time, the smart city paradigm has emerged to improve citizens’ quality of life by developing the smart mobility concept. Vehicular Ad hoc NETworks (VANETs) are widely recognized to be instrumental in realizing such concept, by enabling appealing safety and infotainment services. Such networks come with their own set of challenges, which range from managing high node mobility to securing data and user privacy. The Software Defined Networking (SDN) paradigm has been identified as a suitable solution for dealing with the dynamic network environment, the increased number of connected devices, and the heterogeneity of applications. While some preliminary investigations have been already conducted to check the applicability of the SDN paradigm to VANETs, and its presumed benefits for managing resources and mobility, it is still unclear what impact SDN will have on security and privacy. Security is a relevant issue in VANETs, because of the impact that threats can have on drivers’ behavior and quality of life. This paper opens a discussion on the security threats that future SDN-enabled VANETs will have to face, and investigates how SDN could be beneficial in building new countermeasures. The analysis is conducted in real use cases (smart parking, smart grid of electric vehicles, platooning, and emergency services), which are expected to be among the vehicular applications that will most benefit from introducing an SDN architecture. [less ▲]

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See detailAnalysis of an Energy-Efficient MAC Protocol Based on Polling for IEEE 802.11 WLAN
Palacios, Raul; Mekonnen, Gedlu; Alonso-Zarate, Jesus et al

in IEEE International Conference on Communications (ICC), London, UK, June 2015 (2015)

This paper analyzes the performance of a duty-cycled polling-based access mechanism that exploits the Transmission Opportunity Power Save Mode (TXOP PSM) defined in the IEEE 802.11ac to improve the energy ... [more ▼]

This paper analyzes the performance of a duty-cycled polling-based access mechanism that exploits the Transmission Opportunity Power Save Mode (TXOP PSM) defined in the IEEE 802.11ac to improve the energy efficiency of Wireless Local Area Networks (WLANs) based on the IEEE 802.11. The basic idea behind the proposed approach, named GreenPoll, is to enable contention free periods, based on polling with beacons, during which wireless stations can save energy by turning off their radio transceivers after exchanging data with the access point. The closed expression of energy efficiency of GreenPoll is formulated in this paper and is used to evaluate the performance of GreenPoll considering important parameters like the traffic load, packet length, data rate, and number of stations in the network. Both analytical and simulation results show the high energy efficiency of GreenPoll with gains of up to 330% and 110% when compared to the legacy Distributed Coordination Function (DCF) and the Point Coordination Function (PCF) defined in the IEEE 802.11, respectively. [less ▲]

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See detailEnergy Efficiency of an Enhanced DCF Access Method using Bidirectional Communications for Infrastructure-based IEEE 802.11 WLANs
Palacios, Raul; Granelli, Fabrizio; Kliazovich, Dzmitry UL et al

in IEEE 18th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD), Berlin, Germany, 2013 (2013)

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See detailAn Energy Efficient Distributed Coordination Function Using Bidirectional Transmissions and Sleep Periods for IEEE 802.11 WLANs
Palacios, Raul; Granelli, Fabrizio; Kliazovich, Dzmitry UL et al

in IEEE Global Communications Conference (GLOBECOM), Atlanta, GA, USA, 2013 (2013)

Detailed reference viewed: 105 (2 UL)