| 摘要 |
<p>A method is disclosed for use in a telecommunications network in which that makes use of the Session Initiation Protocol (SIP). The method comprises sending (S2) charging information to a charging function (20) of the network in response to the receipt (S1) of an unsuccessful SIP response to a SIP request. The SIP request may relate to a request to modify an established SIP session. The SIP request may relate to a request to modify the media of an established SIP session, for example by adding, removing or changing the media. The SIP request may be a SIP UPDATE request. The SIP request may be a SIP re-INVITE request. The unsuccessful SIP response may be a non-2xx SIP final response. The network may be a Universal Mobile Telecommunications System comprising an IP Multimedia Subsystem, IMS. The charging function (20) may comprise an IMS Charging Data Function, CDF, or an IMS Online Charging System, OCS. The method may be performed by a Charging Triggering Function of the network.</p> |
