| Conference |
| Type of Publication |
| Dead-Reckoning for Position-Based Forwarding on
Highways |
| Title |
|
|
| Authors |
| Proc. of the 3rd International Workshop on
Intelligent Transportation (WIT 2006), pp.
199-204, Hamburg, Germany, March 2006 |
| Published in |
| Position-Based Forwarding (PBF), i.e. greedy
position-based packet forwarding using a beaconing-induced
neighbor table, suffers from an always-outdated perception of
neighbor positions, especially at low beaconing rates. However,
between-beacon accuracy is likely to be improvable by the
application of dead-reckoning strategies, the extrapolation of
known position information. Especially in vehicular highway
scenarios, where node movement is ``very one-dimensional'' and
changes of direction are impossible, extrapolation seems to be
useful. In this paper we study the effects of dead-reckoning
strategies on the between-beacon position accuracy. To do this,
we have carried out simulations to investigate the impact of
different dead-reckoning strategies on protocol performance and
cost and we explain the trade-offs between them. We conclude: In
German highway scenarios, dead-reckoning enhanced PBF can achieve
almost perfect packet delivery with beacon intervals of up to 6
seconds, whereas standard PBF loses a significant ratio of
packets even at a beacon interval of 1 second. In general, we
show results indicating that the application of dead-reckoning
generates (a) less beaconing traffic with an equal or better
perception of the neighbors' positions and (b) less overall
transmission cost caused by frequent packet retransmissions when
using the same beaconing frequencies. |
| Abstract |
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| Projects |
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