Research and Practice on MT SMS Disaster Recovery Scheme for 5G SA Users
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.
VoLTE SMS gatewayDC disaster recovery5G SA usersMT SMSDisaster recovery switching
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