OFFLINE CHARGING IN IMS NETWORKS FOR SESSIONS HANDED OVER BETWEEN DIFFERENT OPERATOR NETWORKS

摘要

IMS networks and methods are disclosed for providing offline charging for a session of an IMS device that is seamlessly handed over between a home IMS network (110) and a visited IMS network (120) that are different operator networks. A roaming charging identifier, RCID, is assigned to the session in the home IMS network (110) that is global to a dialog of the session over the home IMS network (110) and to a dialog of the session over the visited IMS network (120). Network elements in the home IMS network (110) insert the RCID in offline charging requests that are sent to an offline charging system (116). The offline charging system (116) generates CDRs for the session that also include the RCID. The offline charging system (116) can then aggregate and correlate the CDRs for the session based on the RCID.