IMS网络互联互通的话音业务应急转接  

Emergency switching of voice services on IMS interconnection

作　　者：杨佳琦 胡宇 李成 刘晨 YANG Jia-qi;HU Yu;LI Cheng;LIU Chen(China Mobile Group Co.,Ltd.,Beijing 100033,China;China Academy of Information and Communications Technology,Beijing 100083,China)

机构地区：[1]中国移动通信集团有限公司,北京100033 [2]中国信息通信研究院,北京100083

出　　处：《电信工程技术与标准化》2025年第1期81-86,共6页Telecom Engineering Technics and Standardization

摘　　要：IMS网络互联互通显著提升了网间互联效率,优化了广大人民群众的网间通信体验,但同时也使得互联架构大幅集中化,对网间业务的安全可靠提出了更高要求。本文回顾了我国话音业务互联互通架构演进历程,介绍了当前互联互通现状和面临的容灾挑战。随后,本文提出了电路域转接、第三方转接、现有IMS关口局扩容和新建专用备份节点4个应急转接方案并进行了详细的对比分析。最终得出结论,新建专用备份节点是最优方案,各运营商在全国新建一套或多套IMS互通关口局作为专用备用转接点,当各省内互通链路出现故障时,将业务转发至备用转接点互通。The interconnection of IMS networks significantly improved the eficiency of interconnection,optimized the voice termination experence,but at the same time,it also centralized the interconnection architecture.Therefore,higher requirements for security and reliability of IMS interconnection was put forward by telecommunication regulatory authority and carriers.This paper reviewed the evoluton of voice service interconnection architecture in China,introduced the current situation and facing disaster recovery challenges.Subsequently,this paper proposed four emergency switching schemes,including circuit domain switching,third-party switching,expanding capacity of existing IMS interconnection gateway,and deploying a dedicated backup node.This paper then conducted a detailed comparative analysis between different schemes.In the end,this paper concludes that deploying a dedicated backup node is the most suitable solution,that each carrier establishs one or several IBCF/TrGW nationwide as dedicated backup switching points for voice service to be forwarded to,when there is a failure in the interconnection links within each province.

关 键 词：IMS网络 互联互通 应急转接 

分 类 号：TN915[电子电信—通信与信息系统]