Single Radio Voice Call Continuity (SRVCC) enhancements; Stage 2
SR-VCC has been standardized in Release 8 TS 23.216 [3] to provide seamless continuity when UE handovers from E-UTRAN to UTRAN/GERAN.
This document contains the results of feasibility study of the requirements and the alternative solutions to improve the handover performance of SRVCC.
The objective of this study is as follows:
- Evaluating the performance of current Rel‑8 SRVCC solution;
- Enhancing the performance of the SR-VCC Flow Break with regard to the roaming and non-roaming case;
- Enhancing SR-VCC handover performance while minimizing the impacts on the network architecture for the directions
- from EUTRAN to UTRAN/GERAN; and
- from UTRAN to UTRAN/GERAN.