\todo{include long version of abbreviations at first mention} \begin{acronym}[GN6ASL] \acro{AU}{application unit} \acro{BTP}{Basic Transport Protocol} \acro{CCU}{communication \& control unit} \acro{ETSI}{European Telecommunications Standards Institute} \acro{GN}{GeoNetworking} \acro{GN6ASL}{GeoNetworking to IPv6 Adaptation Sub-Layer} \acro{GNSS}{Global Navigation Satellite System} \acro{IPv6}{Internet Protocol version 6} \acro{ITS}{Intelligent Transportation Systems} \acro{LS}{GeoNetworking Location Service} \acro{LT}{GeoNetworking Location Table} \acro{OBU}{on-board unit} \acro{OSI}{Open Systems Interconnection} \acro{RSU}{road-site unit} \acro{VANET}{vehicular ad-hoc network} \acro{V2X}{vehicle-to-everything} \end{acronym}