| Conference |
| Type of Publication |
| Effects of a Realistic Channel Model on Packet Forwarding
in Vehicular Ad Hoc Networks |
| Title |
|
Felix Schmidt-Eisenlohr
Marc Torrent-Moreno
Hannes Hartenstein
|
| Authors |
| Proceedings of IEEE Wireless Communications and
Networking Conference (WCNC '06), Las Vegas, NV, April 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
differently---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 paper 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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