| Techreport |
| Type of Publication |
| Packet Forwarding in VANETs, the Complete Set of
Results |
| Title |
|
Marc Torrent-Moreno
Felix Schmidt-Eisenlohr
Hannes Hartenstein
|
| Authors |
| Technical Report TR-2006-02, University of Karlsruhe, January 2006 |
| Published in |
| The discrepancy between real-world radio
channel behavior and its standard modeling in simulations (Unit
Disk Graph) is a major reason for protocols to perform different
--~often worse~-- than predicted when deployed in a real-world
setup. As researchers having to deal with real ad hoc networks
are aware of, assuming a fixed border for a node's communication
range might not only lead to inaccurate results but also to a
wrong judgment on the comparison between different protocols. We
have set up a simulation study to investigate the effects of
realistic channel characteristics on packet forwarding strategies
for vehicular ad hoc networks. The contributions of this
technical report are threefold:i) We provide a performance
evaluation of various routing/forwarding strategies under the
realistic non-deterministic Nakagami radio propagation model and
compare the results with the ones obtained using the standard
Two-Ray-Ground model. Validated German highway movement patterns
are used to model node mobility. ii) We demonstrate that
realistic channel conditions present an opportunity and not only
a drawback for some forwarding strategies. More specifically, we
show that for contention-based forwarding (CBF) techniques,
realistic channel characteristics provide a positive impact in
terms of an increased average hop distance. iii) We provide an
analytical derivation of the expected hop distance for CBF that
provides a basis to optimally adjust CBF parameters. |
| Abstract |
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| Projects |
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