Resumen
A communication node for enabling IPv6-based communication in ad hoc network, wherein the communication node being storing a geographic position of the communication node, wherein a position based routing protocol is implemented for IPv6 packet, and wherein in said communication node at least two different types of logical links are provided for the transport of the IPv6 packet over sub-IP geographical routing, wherein one of said at least two different types of logical links is a geographical link being designed to have geographically scoped boundaries, wherein one of said at least two different types of logical links is a topological link being designed to have topologically scoped boundaries, is characterized in that said geographical link is a link-local multicast capable link and the IPv6 packet is transmitted with link-local multicast address via the geographical link. Furthermore, a corresponding method for a communication node for enabling IPv6-based communication in an ad hoc network is disclosed.
Reivindicaciones
1. System for enabling IPv6-based communication in a VANET (Vehicular Ad Hoc NETwork), wherein said VANET includes a plurality of communication nodes, said communication nodes being aware of their geographic position, as well as one or more attachment points providing access to an external infrastructure network, in particular the Internet, wherein a position-based geographical routing protocol is implemented for routing data packets within said VANET, and wherein in said communication nodes at least two different types of logical links are provided for the transport of IPv6 packets over sub-IP geographical routing, wherein one of said at least two different types of logical links is a geographical link - G link - being designed to have geographical logical boundaries, and wherein another of said at least two different types of logical links is a topological link - T link - being designed to have topological logical boundaries. characterized in that said G links are designed to be link-local multicast capable by mapping IPv6 link-local multicast addresses into sub-IP geographical areas. 2. System according to claim 1, wherein said sub-IP geographical areas are manually configured or pre-defined with respect to shape and/or size. 3. System according to claim 1 or 2, wherein said G link is assigned a dynamic target area relative to said communication node's current geographical position. 4. System according to any of claims 1 to 3, wherein a plurality of said G links are employed simultaneously, said G links being associated to different geographic areas. 5. System according to any of claims 1 to 4, wherein on said G links IPv6 unicast traffic is mapped into sub-IP unicast destination identifiers. 6. System according to any of claims 1 to 5, wherein said G links are employed for acquiring globally valid addresses for communication with nodes located in the Internet. 7. System according to any of claims 1 to 6, wherein on said T links IPv6 unicast traffic is mapped into sub-IP unicast destination identifiers. 8. System according to any of claims 1 to 7, wherein broadcast traffic on T links is mapped to a hop count-based broadcast at sub-IP layer. 9. System according to any of claims 1 to 8, wherein IPv6 source addresses of packets outgoing through said T links are addresses assigned on a different interface. 10. System according to any of claims 1 to 9, wherein multiplexing of packets the sub-IP geographical routing layer receives from said at least two logical links and/or de-multiplexing of packets arriving at the sub-IP geographical routing layer together with delivering said packets to one of said logical links is performed on the basis of said packet's destination address type. 11. System according to any of claims 1 to 9, wherein multiplexing of packets the sub-IP geographical routing layer receives from said at least two logical links and/or de-multiplexing of packets arriving at the sub-IP geographical routing layer together with delivering said packets to one of said logical links is performed on the basis of the area in which said packet's source node is located. 12. System according to any of claims 1 to 11, wherein said communication nodes are configured to inject IPv6 routes in their IPv6 routing table for said G link and/or said T link operated by said sub-IP geographical routing layer or a management entity on behalf of it. 13. System according to any of claims 1 to 12, wherein said G links are disabled in case no IPv6 globally routable addresses are required or no IPv6 multicast communication is required. 14. System according to any of claims 1 to 13, wherein said T links are employed for facilitating establishment of optimized packet routes for communication among passenger devices, and/or wherein said G link is configured to serve as egress interface for the IETF protocols Mobile IPv6 and its extension Network Mobility Basic Support. 15. Method for enabling IPv6-based communication in a VANET (Vehicular Ad Hoc NETwork), in particular for being executed by a system according to any of claims 1 to 14, wherein said VANET includes a plurality of communication nodes, said communication nodes being aware of their geographic position, as well as one or more attachment points providing access to an external infrastructure network, in particular the Internet, wherein a position-based routing protocol is implemented for routing data packets within said VANET, and wherein in said communication nodes at least two different types of logical links are provided for the transport of IPv6 packets over sub-IP geographical routing, wherein one of said at least two different types of logical links is a geographical link - G link - being designed to have geographical logical boundaries, and wherein another of said at least two different types of logical links is a topological link - T link - being designed to have topological logical boundaries, characterized in that said G links are designed to be link-local multicast capable by mapping IPv6 link-local multicast addresses into sub-IP geographical areas.
