Study of use cases and requirements for enhanced voice codecs for the Evolved Packet System (EPS)
This study defines and analyses the new use cases in the environment of EPS and its future services. It evaluates how much the newly defined requirements are met by the already available codecs in 3GPP releases prior to Rel-10. Potential new requirements for voice codecs are elaborated in due course.
Specifically, the objective of this study item is to:
• Identify service and system requirements,
• Identify high level requirements,
• Assess the existing codecs in respect to identified requirements,
• Define a strategy for EPS voice codec(s) standardization,
• Identify some use cases for enhanced voice and mixed content conversational multimedia service for EPS (see Annex A).
Starting from Rel-8 timeframe, MTSI as a conversational multimedia service is provided over EPS. MTSI is the main service for which the enhancements are targeted. This does not however exclude the enhanced service requirements from being later adopted to other services where such enhancements are needed and are found suitable.