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Interference-Aware Geocasting for VANET

Författare:
Redaktör:
  • Gregoire Danoy
  • Patricia Ruiz
  • Julien Schleich
  • Marcin Seredynski
Publiceringsår: 2012
Språk: Engelska
Publikation/Tidskrift/Serie: WoWMoM
Dokumenttyp: Konferensbidrag
Förlag: IEEE--Institute of Electrical and Electronics Engineers Inc.

Sammanfattning

With the introduction of standards such as DSRC

and WAVE, vehicular ad hoc networks (VANET) are being considered

as candidates to improve road safety. Safety applications

developed on top of VANET enable vehicle and driver improved

awareness of the road situation through vehicles sharing their

status and knowledge of the road conditions. In order for these

systems to operate, they depend on reliable communication. To

overcome fading, shadowing and other effects that cause packet

loss, such applications commonly use retransmission schemes to

improve packet delivery. However, the wireless channels used for

these applications are bandwidth constrained, and retransmission

can cause interference which in turn will degrade the reliability

of the communication channel. Therefore, it is necessary to find

a strategy that balances retransmission with channel occupancy

for optimal reliability.

In this paper, we present a cooperative retransmission algorithm

that overcomes shadowing caused by blocking objects such

as heavy vehicles in order to combat the resulting unreliability,

whilst controlling the interference caused by retransmissions.

The proposed algorithm weighs up the additional area a node

can cover, with the amount of interference a retransmission by

the same node would cause. We evaluate the performance of

the algorithm in urban scenarios using the NS-3 simulator, and

find that the proposed algorithm is effective in overcoming the

negative effects of shadows caused by blocking objects.

Nyckelord

  • Electrical Engineering, Electronic Engineering, Information Engineering

Övriga

VANET from Theory to Practice
Published
  • Networking-lup-obsolete

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