Patent ID: 6892063

Claim:
A method of monitoring the chargeable activities of a user in a mobile telecommunications network, the method comprising the steps of: monitoring at least a first condition (C 1 ) and a second condition (C 2 ) on which charging is based; normalizing said first condition against a first normalizing value (N 1 ) and said second condition against a second normalizing value (N 2 ), said step of normalizing comprising dividing the value of said condition by said normalizing value to yield normalized conditions; adding said first (C 1 /N 1 ) and second (C 2 /N 2 ) normalized conditions to yield a total consumed charging units value; comparing said total consumed charging units value against a charging unit authorization limit; and wherein said user is a subscriber of a home network and is roaming in a foreign network, and where in the first and second normalizing values are transferred from the home network to the serving node of the foreign network using the Customized Applicatlons for Mobile Network Enhanced Logic (CAMEL) protocol.