| 摘要 |
A method is provided for use in an IP Multimedia Subsystem, IMS, in which a session control protocol (such as the Session Initiation Protocol, SIP) is used to establish and manage sessions within the IMS. The method comprises using session control protocol messages (such as Session Initiation Protocol messages) to carry node- specific charging information, where the charging information is required for charging purposes at a charging control system of the IMS. A private header part (such as a P- Charging-Vector header) of the session control messages may be used to carry the node-specific charging information. The node-specific charging information may comprise charging data and at least one of : an indication of the type of the charging data; a name or identifier of the node, allowing the node to update charging data which relates to the node and which is carried by a session control message received by the node; and an indication of the version of the charging data, a different version indication being used to indicate different charging data; node name; version number; data name; and value. At least one session control protocol message may be used to carry node-specific charging information relating to a plurality of different nodes. |
