Patent ID: 7561579

Claim:
A method for providing a level of service for a Mobile Terminal (MT) in a packet data telecommunications network comprising a Packet Data Function (PDF), a Packet Core Network (PCN) and an IP Multimedia system (IMS), the IMS further comprising a proxy server, the method comprising the steps of: receiving at the MT from a proxy server, during a registration of the MT, an IP address of the proxy server; receiving at the MT from the proxy server, a request for quality of service (QoS) parameters for a session between the MT and the proxy server; generating a token for correlating accounting information and for informing the proxy server of the QoS parameters to be applied to packet data to be sent during the session, wherein the token includes the proxy server IP address, the QoS parameters, and a session identity parameter; sending a response message including the token from the MT to the PCN; forwarding the token from the PCN to the PDF; receiving the token at the PDF; and correlating at the PDF accounting information between the PCN and the IMS.