摘要 |
For optimized IP- routing the invention discloses a home agent and method fo r transfer of an IP packet over a path from a sender (CN) over a radio access network (RAN, HA, FA 11) to a mobile host (MS2), wherein, when a home agent (HA) receives an incoming data packet determined for a mobile host (MS2) wit h a destination address (MS2-address 137.21.16.5), the home agent (HA) examine s if there is a match between the destination address (MS2-address: 137.21.16. 5) of the packet and a subnetwork address (FA 11-address: 137.21.16.0) of a foreign agent (FA 11) stored in a list of subnetwork addresses (137.21.16.0; 137.22.25.0) stored in a list at the home agent (HA), wherein, if there is a match between the destination address (MS2-address: 137.21.16.5) and a subnetwork address (FA 11-address: 137.21.16.0) of a foreign agent, the home agent examines whether a preconfigured path from the home agent (HA) to this foreign agent exists and wherein the home agent (HA) sends the packet to thi s foreign agent (FA 11) on this preconfigured label switched path (37) if a label switched path (37) to this foreign agent exists. |