A new white paper by Diane Myers [pictured], principal analyst for VoIP, UC, and IMS, Infonetics Research, "examines the key Diameter use cases operators need to consider when planning for IP multimedia subsystem (IMS)".
“The growth of IMS around voice over LTE (VoLTE) deployments brings new challenges and opportunities related to Diameter and, ultimately, Diameter signaling controllers. When configured correctly, Diameter can enhance customer experience by ensuring quality of service in voice over LTE calls, video sessions, and enhanced messaging.
By managing Diameter traffic, Diameter signaling controllers (DSCs) play an important role in ensuring a high-quality experience for services running over IMS networks. The four use cases that represent opportunities for DSCs and for which operators need to consider in planning for IMS are 1) session binding, 2) charging, 3) subscription location function, and 4) monetizing assets"
See "Infonetics whitepaper examines the Diameter use cases operators need to plan for in IMS networks" - here.