Innovative Information Science & Technology Research Group (ISYOU)
Vehicular Ad-hoc NETworks (VANETs) are characterized by highly speed nodes, highly dynamic topology and frequent link disconnections. In this paper, the authors introduce some existing Geocast routing protocols for VANETs as well as a classification of these protocols based on the relay selection technique they use. They then provide a comparison of these protocols according to different criteria. While in literature ZORs are often assumed to be of any form and still chosen according to the scenarios and motivation needs of the authors, they consider a ZOR as a set of sub-ZORs and they choose simple geometrical forms for each sub-ZOR so that they would be easy to implement and to represent mathematically.