VoNR concepts and drivers
In this section, the concepts and drivers associated with VoNR are analyzed in three main areas: IMS network deployment growth, 5G system service requirements, and ultra-high-definition audio.
IMS network deployments growth
The number of subscribers associated with packet voice services over telephony such as VoLTE is rising significantly. According to the 2018 Ericsson Mobility Report (https://www.ericsson.com/491e17/assets/local/mobility-report/documents/2018/ericsson-mobility-report-june-2018.pdf), VoLTE subscriptions are projected to reach 5.4 billion in 2023, which means that the service providers will be implementing more IMS deployments for VoLTE services. The same IMS architecture can also be employed for VoNR services when a service provider deploys a 5G network. therefore, leveraging existing IMS deployments will be a key driver for VoNR.
5G system service requirements
The 3rd Generation Partnership Project (3GPP) technical specification...