Method and system for mobile ip nodes in heterogeneous networks

A system for mobile IP nodes (10) in heterogeneous networks (21-24), which system comprises a home agent for dynamic assignment of a temporary IP care-of address to a static IP home address when the mobile node (10) is moved in the heterogeneous networks (21-24), the dynamic care-of address indicating the topologically current network location of the mobile node (10) and for redirecting IP data packets with the IP home address of the mobile node (10) as destination address to the care-of address of the mobile node (10), wherein

• the mobile node (10) comprises an interface administration module (134), the interface administration module (134) comprising a unit for checking the mobile node (10) for available physical network interfaces (14-17) and a unit for linking to one of the available physical network interfaces (14-17),
• the network administration module (134) comprises a unit for drawing up a lookup table of the momentarily available and configurable physical network interfaces (14-17),
• the mobile node (10) comprises a permanently generated, virtual IP network interface (133) which comprises a generated virtual L3 layer and a generated virtual L2 layer and is linked to the current network (21-24) via the interface administration module (134), the link of the permanent virtual IP network interface (133) to the network being updated by means of the interface administration module (134) based on the lookup table during a change of the physical network interface (14-17) of the mobile node (10).