| 摘要 |
A network node for use as an application server, AS, (106) in a core network. The network node comprises a receiver (304) configured to receive a call setup message from an Interrogating Call Session Control Function, l-CSCF, wherein the call setup message requires data to be transmitted over a foreign network. The network node comprises a route profile determiner (314) configured to determine a route profile for data relating to the call and for control of last hop decisions in a border element (100) between the core network and the foreign network. The network node comprises a Fully Qualified Domain Name, FQDN, retriever (316) configured to retrieve from a database a FQDN associated with a user service profile and the determined route profile. The network node comprises a FQDN controller (318) configured to insert the retrieved FQDN into the call setup message and to control a transmitter (302) to transmit the call setup message to a border element (100). |
