9 IMS Multimedia Telephony with Enhanced Voice

22.1733GPPIP Multimedia Core Network Subsystem (IMS) Multimedia Telephony Service and supplementary servicesRelease 17Stage 1TS

The IMS Multimedia Telephony with Enhanced Voice should fulfill the following requirements:.

– IMS Multimedia Telephony with Enhanced Voice should allow for significantly improved quality of user experience compared to IMS Multimedia Telephony with pre-Rel-12 voice services.

– It should be possible to achieve significantly better service quality than is possible with both Rel-11 3GPP narrowband and wideband voice services.

– IMS Multimedia Telephony with Enhanced Voice should be deployable in an efficient manner.

– IMS Multimedia Telephony with Enhanced Voice should efficiently use the transmission resource access and transport networks. It should also allow possibility to implement the new services on low-cost devices and network equipment with limited computational resource. With regard to transmission efficiency, it should exceed that of the pre-Rel-12 3GPP wideband voice service.

– Transcoding should be avoided as much as possible. If transcoding cannot be avoided, voice conversational quality degradation should be as limited as possible.

– The best possible quality should be delivered to all participants in conference calls.

Annex A (informative):
General terminal guidelines