ETSI TS 132 240-2005 全球移动通信系统(UMTS).通信管理.计费管理.计费架构和原则.3GPP TS 32.240(版本6.3.0,第6次发布)
Universal Mobile Telecommunications System (UMTS); Telecommunication management; Charging management; Charging architecture and principles 3GPP TS 32.240 Version 6.3.0 Release 6