Patent ID: 7436942

Claim:
A system for charging in an IP communication network, the IP communication network comprising: a user equipment; an IP Multimedia subsystem, said IP Multimedia subsystem including: a Proxy-CSCF; a calling user's home network Serving-CSCF; a called user's home network Serving-CSCF, a location server; a charging server wherein the calling user's home network Serving-CSCF is arranged for receiving a call/session set-up request message, forwarding the call/session set-up request message to the called user's home network Serving-CSCF, asking the relevant location information of the called user from the Location Server, asking tariff information for the called user in the relevant locations from a Charging Server, creating a dynamic tariff list, sending the dynamic tariff list to a calling party user equipment, and sending the dynamic tariff list to a called party user equipment, and wherein the calling party user equipment is arranged for receiving the dynamic tariff list, displaying the dynamic tariff list to the calling user, detecting selections of the calling user, and sending the call/session set-up request message for setting up an IP Multimedia call/session.