The Design And Realize Of Centrex's Charging Application In IMS

This paper provides a charging application of CENTREX in IMS.By having research work on the latest 3GPP tech specifiction releated with charging,designing the AVP(Attribute value pair),CDR,signalling procedure and having test,I design and realize the schme of charging correaltion between the Application layer and IMS control layer,Bearer layer and IMS control layer.The sense of this paper is offering a charging correlation schme when China Mobile finished the IMS equipments alloction and giving a strong support for the charging in a accurate and successful manner.The paper finished the designing work for control singnalling and charging singnalling of CENTREX's main function in IMS field and the designing work of CDR for different IMS function entity and the test work.This paper can be divided into three parts and six chapters.Ths first part includes the first and the second chapters,it gives a brief look about this paper and descriped what work this shcme finished and what the background the topic care is.The second part includes the third and the fourth chapters,it provides the conception of IMS charging and CDR design which the the third part needs.The third part includes the fifth and sixth chapters,the real design and test are in this part which includes the realize about the signalling procedure design,test case design,the testmony work and the problem met in the procedure of design and the solution which solve the problem.