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ITU-T work programme

[2017-2020] : [SG11] : [Q1/11]

[Declared patent(s)]  - [Associated work]

Work item: Q.DEN_IMS
Status: Under study 
Approval process: TAP
Type of work item: Recommendation
Version: New
Provisional name: -
Equivalent number: -
Timing: 2019-11 (Medium priority)
Liaison: ITU-T SG2, IETF
Subject/title: Signalling architecture of distributed ENUM networking for IMS
Summary: This draft Rec. will address the signalling architecture, signalling requirements, signalling procedures, protocols to be applied for interfaces, and security consideration for distributed ENUM networking in support of IMS interconnection. In IMS network, ENUM serves to map the E.164 number of the destination into an SIP URI, which can clearly identify the destination network and the associated destination IMS service. Currently, an ENUM hierarchical model addressed in GSMA PRD IR.67 was proposed to implement the IMS interconnection. This ENUM hierarchical model consists of Tier0 (global level), Tier1(country code level) and Tier2(service provider level). Due to the absence of Tier0 and Tier1ENUM, and the security concern on opening Tier2 ENUM to external queries, this ENUM hierarchical model can hardly be set up worldwide. The international interconnection of IMS between operators becomes a significant issue. The goal of this document is to present a distributed ENUM model as a candidate solution to enable the IMS interconnection, simplify the deployment procedures of ENUM server, and speed up the implementation of IMS interconnection. As more and more operators have launched the VoLTE service, it's a big challenge for the industry to interconnect all those new IMS networks together. The standardization of signalling architecture, signalling requirements, signalling procedures for this distributed ENUM model is in urgent demand.
Comment: -
Base text(s):
[TD 27-WP1 ]
Contact(s):
Jinlan Ma, Editor
Nangxiang Shi, Editor
Xiaojie Zhu, Editor
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First registration in the WP: 2017-11-27 14:06:54
Last update: 2019-06-27 10:02:28