Abstract: Billing system is one of the most important parts of the next generation network. It provides integrated services for consumers, including data services, voice services and video services. Event splitting and rounding is an important problem of billing system to support flexible rate policy. A common billing system architecture and a new spitting and rounding algorithm are proposed. The implementation of billing system for integrated services network is introduced based on the common billing system architecture. The spitting and rounding algorithm are embedded.

Key words: billing, event splitting, rounding, integrated services