The IP multimedia subsystem (IMS) has been adopted, and will be adapted as required, to support session-based services, and other services based on session initiation protocol (SIP). This Recommendation describes how the IMS can be usedin the NGN context following the fundamental principles described in [ITU-T Y.2001] and [ITU-T Y.2011] for providing the IP multimedia service component of the NGN functional architecture and describes its relationships to other service components.
ITU-T Y.2021-2006 Referenced Document
ETSI TS 123 002-2006 Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Network architecture 3GPP TS 23.002 Version 7.1.0 Release 7
ETSI TS 123 228-2006 Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); IP Multimedia Subsystem (IMS); Stage 2 3GPP TS 23.228 version 7.5.0 Release 7
ITU-T Q.1741.4-2005 IMT-2000 references to release 6 of GSM evolved UMTS core network Study Group 19*， 2024-04-18 Update
ITU-T Q.1742.4-2005 IMT-2000 References (approved as of 30 June 2004) to ANSI-41 evolved Core Network with cdma2000 Access Network Study Group 19
ITU-T Y.101-2000 Global Informatioon Infrastructure Technology - Terms and Definition Series Y: Global Information and Infrastructure and Internet Protocol Aspects Global Information Infrastructure - General
ITU-T Y.2001-2004 General overview of NGN (Study Group 13)*， 2024-04-18 Update
ITU-T Y.2011-2004 General principles and general reference model for next generation networks SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE INTERNET PROTOCOL ASPECTS AND NEXT GENERATION NETWORKS Next Generation Networks Frameworks and functional architecture models Study Gro*， 2024-04-18 Update
ITU-T Y.2012-2006 Functional requirements and architecture of the NGN release 1 Study Group 13
ITU-T Y.2021-2006 history
2006ITU-T Y.2021-2006 IMS for Next Generation Networks Study Group 13