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7.19   Key Issue - Service continuity at domain and RAT change for TS 11, TS 12 and equivalent PS service
7.19.1   Voice call continuity between IMS over SAE/LTE access and CS domain
7.19.1.1   Description of key issue Voice call continuity between IMS over SAE/LTE access and CS domain
7.19.1.2   General aspects   Word-p. 96
7.19.1.3   Alternative solution A - Combinational VCC
7.19.1.4   Alternative solution B
7.19.1.5   Alternative solution C - CreDT
7.19.1.6   Alternative solution D - "Inter-MSC Handover" solution
7.19.1.6a   Alternative D-1 - Inter-MSC Handover with anchoring at the VCC Application   Word-p. 100
7.19.1.6b   Alternative D-2 - LTE-VMSC Anchor Solution   Word-p. 109
7.19.1.7   Alternative E - IMS Anchored Voice Continuity
7.19.1.8   Alternative F - Inter-MSC Handover with IMS Centralised Services   Word-p. 124
7.19.1.9   Alternative D/F      Up
7.19.1.10   Partial Conclusions on Voice call continuity between IMS over SAE/LTE access and CS domain      Up
7.19.1.11   Evaluation of the remaining options   Word-p. 145
7.19.1.12   Conclusions on Voice call continuity between IMS over SAE/LTE access and CS domain over GERAN/UTRAN access   Word-p. 148
7.19.2   Handover of MSC controlled voice calls between SAE/LTE access and CS access
7.20   Key Issue - SAE Identities      Up
7.21   Key Issue - Network Discovery and Selection   Word-p. 153
7.22   Key Issue - Voice service continuity between cdma2000 1xRTT Revision A and E-UTRA
8   Consolidated architecture
9   Conclusions

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