Billing System Based On State Machine Framework

With the developing of BOSS, rating rules become more and more complicated. Billing Engine Technique is now the Bottle-Neck of BOSS.The article analyses the common used ID Group Billing Engine, and then introduces a method of thinking Billing Engine with FSM, and presents an approach to solve Billing Engines problem with FSM.The article builds a Billing Engine Framework with FSM. The framework abstracts and fines rating elements, and then to decompose business rules with them. Finnaly, to construct a state transmit tree by decomposing all of the business rules. Go under this tree, the result to be one route the engine has pass through match one business rule.At the end of the acticle is the coding of main procedurese, and an example to illustrate the usage of the Framework.Billing Engine with FSM has features such as uniform procedure, efficiency and flexible.It can satisfy the flexible of operation, and reduce cost of maintenance.