INTERWORKING FUNCTION FOR ENABLING VOLTE ROAMING

This invention is a system and method for implementing a VoLTE and circuit switched voice and SMS interworking function to provide voice and SMS service to roaming mobile devices at visiting network based on VoLTE roaming and 'SMS over SGs' towards VPLMN, and circuit-switched voice and SMS...

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Bibliographic Details
Main Authors DATAR, Prashant, BEACH, Brian, XU, Huiyue, YAU, Edward
Format Patent
LanguageEnglish
French
German
Published 07.02.2024
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
WIRELESS COMMUNICATIONS NETWORKS
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Summary:This invention is a system and method for implementing a VoLTE and circuit switched voice and SMS interworking function to provide voice and SMS service to roaming mobile devices at visiting network based on VoLTE roaming and 'SMS over SGs' towards VPLMN, and circuit-switched voice and SMS towards HPLMN. The interworking function enables and redirects IMS traffic at VPLMN towards a hosted IMS core with voice connectivity to PSTN via MGCF and MGW. The interworking function also performs circuit-switched location-update registration at HLR at HPLMN for receiving mobile-terminated voice calls and SMS.
Bibliography:Application Number: EP20210933435