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In this paper, the authors propose GeoCross, a simple, yet novel, event-driven geographic routing protocol that removes cross-links dynamically to avoid routing loops in urban Vehicular Ad Hoc Networks (VANETs). GeoCross exploits the natural planar feature of urban maps without resorting to cumbersome planarization. Its feature of dynamic loop detection makes GeoCross suitable for highly mobile VANET. They have shown that in pathologic cases, GeoCross's Packet Delivery Ratio (PDR) is consistently higher than Greedy Perimeter Stateless Routing's (GPSR's) and Greedy Perimeter Coordinator Routing's (GPCR's).
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