Ericsson has collaborated with MediaTek on performing interoperability tests spanning Stand Alone New Radio (SA NR), 5G Core and IP Multimedia Subsystem (IMS) to ensure that voice support is enabled as service providers evolve their 4G networks to 5G. The two partners have also successfully tested Evolved Packet System (EPS) Fallback for situations where SA is not available.
The interoperability test, which was conducted at the Ericsson Lab in Kista in early December, involved the use of an end-to-end solution from Ericsson and Dimensity 1000 commercial chipset from MediaTek deployed on a 3.5GHz TDD band.
With Standalone New Radio (SA NR), a 5G-enabled device does not need to rely on 4G technology to make 5G voice (VoNR) calls. With the arrival of standalone NR access, voice and other communication services will need to be provided, requiring the 5G network to support native voice calling services for 5G smartphones. Using VoNR on SA architecture, service providers will be able to offer voice services on 5G-voice-capable devices as well as enhanced mobile broadband (eMBB) services to consumers and business users.
Hannes Ekström, Head of Product Line 5G RAN, Ericsson, says: “Although 5G is closely associated with superior data-transfer capabilities, voice services remain essential for mobile users. So 5G phones are expected to provide all the capabilities of 4G phones in addition to new 5G features and services. Ensuring continued voice services on 5G devices must therefore be addressed properly.
