| 摘要 |
The invention relates to a method for packet-based data transmission in a network having mobility functionality, the network having a plurality of nodes and network elements, a first node (MN) being associated with a first address (HoA) being a home address in a home subnet (HN), wherein the mobility functionality enables a seamless and continuous data transmission between the first node (MN) and a second node (CN), while and after the move of the first node (MN) from its associated home subnet (HN) to a visited subnet (VN), wherein a second address (CoA) in the visited subnet (VN) to which the first node (MN) has moved is assigned to the first node (MN); the second address (CoA) is mapped to the first address (HoA); a first network element (HA-C) providing control functionality for said first node (MN) is informed about the mapping between the first and the second address (HoA, CoA); a second network element (HA-D) being a network element different from the first network element (HA-C) and providing data transmission functionality for the first node (MN) is triggered by the first network element (HA-C) to establish a packet-based tunnel (T) between the first address (HoA) and the second address (CoA); the second network element (HA-D) establishes the packet-based tunnel (T) between the first address (HoA) and the second address (CoA); upon establishment of the packet-based tunnel (T), an acknowledgement is sent from the second network element (HA-D) to the first network element (HA-C) and from the first network element (HA-C) to the first node (MN); data is transmitted between the first node (MN) and the second node (CN) via the packet-based tunnel (T).
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