IP Multimedia Subsystem (IMS)
is a new mobile network architecture, a new way to deliver rich real-time communication services (voice, video, data, etc.) for both consumers and business users over any access network, especially VoLTE (Voice over LTE) and VoNR (Voice over New Radio).
IMS provides IP-based consolidation of core networks and enables convergence of fixed and mobile assets. This guarantees scalability and seamless interoperability with legacy networks, driving the evolution to the 5G core.