Iu enhancements for IP Multimedia (IMS) support in UTRAN
This present document is for the 3GPP Release 6 Work Item “Iu Enhancements for IMS Support in UTRAN”(see [1]).
Release 5 enables the basic support for IMS in the RAN but evaluation of possible further enhancements was decided in RAN#19.
The purpose of the present document is to aid TSG RAN WG3 to standardise these possible improvements in release 6 by refining the requirements from a RAN thorough perspective and evaluate the associated optimisations in the handling of IMS RAB in the RNC.
This document is intended to gather all this information, assess the proposals of enhancements and agree on some of them in section 7 before integrating them into the Technical Specifications.
This document is a ‘living’ document, i.e. it is permanently updated and presented to TSG-RAN meetings.