FIELD: information technology.
SUBSTANCE: invention describes a communication network (100) and methods for sharing charging information between a home IMS network (100) and a visited IMS network (120). If a signalling message for a session is received in the visited IMS network (120), the visited IMS network (120) assigns a visited charging identifier, e.g. ICID, and shares the visited charging identifier with the home IMS network (110) through signalling messages. Similarly, the home IMS network (110) assigns a home charging identifier, and shares the home charging identifier with the visited IMS network (120) through signalling messages. When charging data records (CDR) are generated in the home IMS network (120) and the visited IMS network (120), the networks include the home charging identifier and the visited charging identifier in the CDR so that billing systems (116, 126) may more easily correlate the CDR from different IMS networks (110, 120).
EFFECT: high reliability of the billing system owing to connection identification based on home and visited network identifiers.
10 cl, 13 dwg
