Evaluating Multi-Hop Beaconing Forwarding Strategies for IEEE 802.11p Vehicular Networks (Contributo in atti di convegno)

Type
Label
  • Evaluating Multi-Hop Beaconing Forwarding Strategies for IEEE 802.11p Vehicular Networks (Contributo in atti di convegno) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Alternative label
  • Federico Librino, Maria Elena Renda, Paolo Santi (2013)
    Evaluating Multi-Hop Beaconing Forwarding Strategies for IEEE 802.11p Vehicular Networks
    in IEEE Vehicular Networking Conference, Boston, 16/12/2013
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Federico Librino, Maria Elena Renda, Paolo Santi (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • IIT-CNR (literal)
Titolo
  • Evaluating Multi-Hop Beaconing Forwarding Strategies for IEEE 802.11p Vehicular Networks (literal)
Abstract
  • Multi-hop propagation of situational information is a promising technique for improving beaconing performance and increasing the degree of situational awareness onboard vehicles. However, limitation on beacon size prescribed by standardization bodies implies that only information about 3-4 surrounding vehicles can be piggybacked in a beacon packet. In most traffic situations, the number of vehicles within transmission range is much larger than 3-4, implying that multi-hop forwarding strategies must be devised to select which neighboring vehicle's information to include in a transmitted beacon. In this paper, we investigate the effectiveness of different multi-hop forwarding strategies in delivering fresh situational information to surrounding vehicles. Effectiveness is estimated in terms of both average information age and probability of experiencing a situational-awareness blackout of at least 1 sec. Both metrics are estimated as a function of the hop distance from the transmitting vehicle. The investigation is based on extensive simulations whose multi-hop communication performance is corroborated by real-world measurements. The results show that network-coding based strategies substantially improve forwarding performance as compared to a randomized strategy, reducing the average information age of up to 60%, the blackout probability of two orders of magnitude, and providing a performance similar to that of an idealized strategy in which complete situational information is included in the beacon. (literal)
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