There has been a race to be the first to announce
Voice-over-LTE (VoLTE) deployments with SK Telecom in Korea (http://lteworld.org/news/sk-telecom-launches-voice-over-lte-service
and MetroPCS in the US http://lteworld.org/news/metropcs-launches-volte-capable-lte-smartphone) being the leaders.
Voice-over-LTE is implemented using the IP Multiple-media
subsystem (IMS) that has been awaiting a real world application for a long time
and VoLTE and follow-on IMS-based services like Rich Communication Services
(RCS) may be the catalyst to drive the revenue to justify the IMS rollout.
Like the LTE core network, IMS uses Diameter signaling
extensively between its components. If you think LTE caused a Diameter
signaling explosion, then with VoLTE you ain’t seen nothing yet!
Chris Knight
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