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Inter-Vehicle Communication will become an important building block
for ITS telematics applications like safety and warning functions.
Mobile ad hoc networks (MANETs) can serve as a local wireless
network for exchanging information between cars for cooperative
driver assistance applications. For the routing of data packets in
such large-scale MANETs consisting of vehicles on the road,
geographic multi-hop packet forwarding is a promising approach.
However, a main drawback is that it performs poorly in networks with
many topology holes. In this paper, we propose a spatially aware
packet routing approach to predict permanent topology holes caused
by spatial constraints and avoid them aforehand. This approach is
generic and can be used in combination with any existing geographic
forwarding protocol as an extension. Our simulations demonstrate
that spatial awareness can significantly improve geographic
forwarding performance in situations with many permanent topology
holes, like in dynamic vehicle networks.
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