Studies on services with CAMEL features in 3G

IN (intelligent network) technology has been used as a useful tool for competition between mobile service providers since the 1990s. Currently, 3G (3rd Generation) mobile service providers are making efforts to provide not only 3G IN services hut also 2G IN services that have the same dialing pattern as that in 2G to 3G mobile service user. For such a development goal, it is important to analyze the technical specification of 3G standard groups like 3GPP (3rd generation partnership project) and 3GPP2, since the progress of the standardization has influence on the related vendor´s practical development activity for 3G. Prepaid wireless service is one of the most important value-added services not only in 2G mobile service but also in 3G. In the prepaid wireless service, one of the most important things is realtime online charging mechanism. In this paper, we propose and development prepaid wireless service with real-time rating control algorithm using CAMEL (customized application for mobile networks enhanced logic) feature in 3G environments. Also, we describe and analyze the real-time online charging mechanism for 3G mobile services in UMTS (universal mobile telecommunication system).