Cellular 4G/LTE Channel Test and Measurement Channel

Voice and SMS in LTE

White Paper

R&S_April2012_WP

Abstract
This white paper summarizes the technology options for supporting voice and short message service (SMS) in LTE, including circuit switched fallback (CSFB), SMS over SGs, and voice over LTE (VoLTE). It includes background information on the standardization process, and the commercial implications for the different options. The white paper also addresses test and measurement requirements resulting from the support of voice and SMS in LTE.  

Introduction
For mobile network operators, voice and short message service (SMS) have consistently been major sources of revenue. Optimum support of these conventionally circuit switched services in data-oriented LTE is essential. This white paper summarizes the technology options for supporting voice and SMS in LTE, including circuit switched fallback (CSFB), SMS over SGs, and voice over LTE (VoLTE). It includes background information on the standardization process, and the commercial implications for the different options. The white paper also addresses test and measurement requirements resulting from the support of voice and SMS in LTE. This includes terminal protocol testing and voice quality testing.

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