Abstract: This chapter discusses the likely long‐term solution for LTE voice calls, namely the delivery of voice over IP streams that are controlled by the IP multimedia subsystem (IMS). The IMS is ...

Abstract: This chapter introduces the IP Multimedia Subsystem (IMS), which is the core network of Voice over LTE (VoLTE). It then focuses on IMS architecture, IMS core network elements, and the IMS ...

After years of failing to live up to its hype, the IP multimedia subsystem (IMS) market may finally be taking off in 2009. But the technology's fate is linked closely to the success of Long Term ...