Abstract: The nex t g eneratio n operation and suppo rt sy stem ( N GOSS) has been focusing o n management of nex t g eneratio n netw ork. Definition o f the parameters is fundamental fo r the IP charging and acco unting system in N GOSS and classi fica tion act s as a g uideline fo r the defini tio n. Cur rent results had only listed some parameters a nd propo sed a classi fica tion metho d w hich needs to be improved.A classi fica tion and systematic definition method o f IP charging a nd acco unting parameters are presented, w hich hav e been applied in the desig n and implementation of a pro to ty pe.

Key words: IP charging and accounting parameters, definition, classification, next generation operation and support system