Yes, 5G networks can support SMS through two main methods: SMS over NAS (Non-Access Stratum) and SMS over IMS (IP Multimedia Subsystem).
Both methods ensure that SMS functionality remains robust and accessible even as networks evolve from 4G to 5G, providing continuity of service and leveraging the enhanced capabilities of 5G technology.
SMS over NAS: This method allows SMS messages to be transmitted directly over the 5G network's Non-Access Stratum, a layer that facilitates communication between a device and the network's core, independent of the radio access technology. SMS over NAS is particularly useful during the initial phases of 5G deployment, where standalone 5G networks (SA) might not have full IMS support. It ensures that SMS services can be delivered efficiently without relying on legacy networks or systems.
SMS over IMS: As 5G networks mature and become more integrated with IMS for delivering voice services (like VoNR for Voice over New Radio), SMS over IMS becomes the preferred method for handling text messages. This approach leverages the IP Multimedia Subsystem to send SMS messages as data packets over the 5G network. It offers advantages in terms of integration with other IMS-based services and can provide a more seamless experience for users, especially as networks transition to fully support 5G capabilities..