After the successful completion of the GeoNet project, and the subsequent ETSI publication of contributed GeoNetworking protocol standard and IPv6-over-GeoNetworking adaptation layer standard, several companies and institutes are implementing these standards worldwide. The following map shows the presently known GeoNetworking implementations.
The next major milestone will be the interoperability plug-tests on November 14-18 in Helmond, Netherlands, where the interoperability and standards compliance of these implementations will be verified.
From safety perspective, vehicular safety applications are expected to rely on communication capabilities for information gathering beyond their immediate environment and line-of-sight vision, and for sharing of detected safety information. In this context the position of vehicles rather than their identity is relevant, as vehicles share their actual positions and anticipated trajectories, coordinate merging manuevers among sideways neighbors, instantly notify the vehicle travelling behind of a braking action, or warn oncoming traffic of an icy patch. GeoNet will implement the networking mechanism for reliable and scalable delivery of such information to all vehicles for whom it is relevant. Its facilitation of cooperative awareness will enable safety applications to initiate warning or mitigation actions when required and to identify transaction partners or destination area for dissemination of their messages.
From IP networking perspective, geographic networking provides assistance with message delivery in a vehicular environment of quickly changing topology. We plan to integrate geographic routing with IPv6 NEMO mobility architecture. The design goal is to provide vehicular message routing, which is efficient under quickly changing topology, and works without excessive amount of air interface signalling. At the same time already standardized IPv6 NEMO system may perform its task seamlessly, as underlying geographic networking may present the multi-hop vehicular routing part as a virtual single-hop connection between a road-side unit and vehicles in its service area.
Geographic addressing and routing is a networking mechanism distributing the information to nodes within a designated destination area. A novel routing protocol is in charge of information dissemination over multiple hops until every vehicle has received this information within the destination area. Each vehicle evaluates whether re-transmission is required and executes it with proper timing if needed. In this concept, individual nodes’ addresses are linked to their geographical position which is used by forwarding algorithms to transport data packets towards the destination node (“geographical unicast” or “geounicast”). Also, geographical positions are used to define a geographical region that can be linked to nodes, either to address all nodes in the region (“geographical broadcast” or “geocast”) or to address anyone of the nodes in the region (“geographical anycast” or “geoanycast”).