6.2.3 Returning back to E-UTRAN

23.2163GPPRelease 16Single Radio Voice Call Continuity (SRVCC)Stage 2TS

Once CS service ends in CS domain, existing mechanisms as specified in TS 23.401 [2] and TS 23.060 [10] can be used to move the UE to E-UTRAN e.g. by prioritizing E-UTRAN over GERAN/UTRAN.

NOTE: The BSC/RNC can consider the availability of E-UTRAN.

When configured to support the return to E-UTRAN after SRVCC, the MSC shall indicate this to GERAN/UTRAN during the release of an RR connection that was established for SRVCC, e.g. by indicating the last used E-UTRAN PLMN. GERAN and UTRAN may use the indication from the MSC to determine which of the existing mechanisms that should be used to move the UE to E-UTRAN, see also TS 23.272 [42].