5G SA用户的短信接收容灾方案研究与实践  

Research and Practice on MT SMS Disaster Recovery Scheme for 5G SA Users

作　　者：阎艳芳[1] 郝双洋 邵斐 杨姣 YAN Yanfang;HAO Shuangyang;SHAO Fei;YANG Jiao(China United Network Communications Co.,Ltd.Henan Branch Innovation Studio,Zhengzhou 450000,China)

机构地区：[1]中国联合网络通信有限公司河南省分公司,河南郑州450000

出　　处：《数字通信世界》2024年第3期41-44,共4页Digital Communication World

摘　　要：当VoLTE短信网关主用数据中心(DC)发生故障切换到容灾DC时,在用户刷新注册前,容灾DC收到短信中心下发的手机终呼(MT)消息会通过3G电路域网络完成消息终呼。但5G SA用户只附着在5G核心网络,无法通过3G电路域网络下发短信。随着5G SA用户的快速发展,需要解决VoLTE短信网关容灾切换后5G SA用户不能及时接收短信的问题。另外,当IMS网络中服务呼叫会话控制功能(S-CSCF)节点发生容灾倒换时,4G用户可通过回落至3G电路域进行短信的再投递,而5G SA用户在没有重新发起新的注册请求前,由于没有3G电路域注册信息,也无法从3G电路域接收短信。文章阐述了当VoLTE短信网关单DC故障和核心网S-CSCF发生故障时,5G SA的容灾问题。When the main DC of VoLTE SMS gateway fails and switches to the disaster recovery DC, before the user refreshes registration, the disaster recovery DC receives an MT message from the SMS center and completes the message termination call through the 3G network. But 5G SA users are only attached to the 5G core network and cannot send text messages through the 3G network. With the rapid development of 5G SA users, it is necessary to solve the problem of 5G SA users not receiving SMS in a timely manner after VoLTE SMS gateway disaster recovery switching. In addition, when the S-CSCF node in the IMS network undergoes a disaster recovery switch, 4G users can re deliver SMS by falling back to the 3G domain, while 5G SA users cannot receive SMS from the 3G domain without initiating a new registration request due to the lack of 3G domain registration information. The article elaborates on the disaster recovery problem of 5G SA when VoLTE SMS gateway single DC failure and core network S-CSCF failure occur.

关 键 词：VoLTE短信网关 DC容灾 5G SA用户 MT短信 容灾倒换 

分 类 号：TN929.5[电子电信—通信与信息系统]