Patent ID: 7027818

Claim:
A method for provisioning of subscribed quality of service (QoS) guarantees related to the handling of multimedia components to users in a framework of telecommunication networks with common rules when a user registered in his home netowrk has to call from a visited network, each network comprising a service policy decision point, a network resource policy decision point, a user resource policy decision point, a call state control function, a service GPRS support node, and a gateway GPRS support node, said method comprising: transmitting subscribed QoS characteristics specified in a subscription profile of said user as provided for in the service policy decision point of the home network to the service GPRS support node and a serving call state control function in the framework by transmitting Session Initiation Protocol (SIP)/Session Description Protocol (SDP) messages between a serving call state control function of said home network and a proxy call state control function of said visited network; and transmitting user perceived QoS characteristics requested by the user per multimedia component and per session, said user perceived QoS characteristics being other than said subscribed Quality of Service QoS characteristics, said user perceived QoS characteristics being transmitted by extending the SIP/SDP messages transmitted between said user calling from said visited network via a serving call state control function in said home network and a proxy call state control function in said visited network.