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Sökning: WFRF:(Marron Pedro)

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  • Fotouhi, Hossein, et al. (författare)
  • Smart-HOP : A Reliable Handoff Mechanism for Mobile Wireless Sensor Networks
  • 2012
  • Konferensbidrag (refereegranskat)abstract
    • Handoff processes, the events where mobile nodes select the best access point available to transfer data, have been well studied in cellular and WiFi networks. However, wireless sensor networks (WSN) pose a new set of challenges due to their simple low-power radio transceivers and constrained resources. This paper proposes smart-HOP, a handoff mechanism tailored for mobile WSN applications. This work provides two important contributions. First, it demonstrates the intrinsic relationship between handoffs and the transitional region. The evaluation shows that handoffs perform the best when operating in the transitional region, as opposed to operating in the more reliable connected region. Second, the results reveal that a proper fine tuning of the parameters, in the transitional region, can reduce handoff delays by two orders of magnitude, from seconds to tens of milliseconds.
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  • Marqués, Antonio, et al. (författare)
  • NOBEL - A Neighborhood Oriented Brokerage ELectricity and Monitoring System
  • 2011. - 17
  • Ingår i: Energy-Efficient Computing and Networking. - Berlin, Heidelberg : Springer Berlin Heidelberg. ; 54, s. 187-196
  • Tidskriftsartikel (refereegranskat)abstract
    • Distributed generation of energy coming from various vendors, even private homes, is a big challenge for tomorrows power management systems that, unlike today, will not dispatch energy centrally or under central control. On the contrary, the production, distribution and management of energy will be treated and optimized in a distributed manner using local data. Even today, parts of the power system are highly nonlinear with fast changing dynamics. It is hard to predict disturbances and undertake countermeasures on time. In existing approaches electricity is distributed to the final users according to its expected estimated demand. Such non-dynamic approaches, are difficult to evolve and can not accommodate rapid changes in the system. By having a cross-layer and open information flow among the different actors involved we can make better and more timely predictions, and inject new dynamics in the system that will lead to better energy management and achieve better energy savings. The NOBEL project is building an energy brokerage system with which individual energy prosumers can communicate their energy needs directly to both large-scale and small-scale energy producers, thereby making energy use more efficient.
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