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Content for  TR 23.771  Word version:  13.0.0

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5  Key issuesWord‑p. 10

6  SolutionsWord‑p. 15

6.1  Solution 1: ePDG selection when UE can detect being in the home country

6.2  Solution 2: ePDG selection when the UE cannot know it is in Home Country

6.3  Solution 3 for key issue #3: UPLI via SIP for untrusted WLANWord‑p. 16

6.4  Solution 4 for key issue #3: UPLI via EPC for untrusted WLAN

6.5  Solution 5 for key issue #3: UPLI via IKEV2 for untrusted WLAN

6.6  Solution 6 for key issue #3: UPLI to OMA serverWord‑p. 17

6.7  Solution 7 for key issue #3: UPLI to OMA server (fallback use case)

6.8  Solution 8: Location information from LRF for s2a

6.9  Solution 9: Handling of UE multiple provided location informationWord‑p. 20

6.10  Solution 10: Location Information Included in SIP Register

6.11  Solution 11: Determine Emergency Call NumbersWord‑p. 21

6.12  Solution 12: Select a WLAN for Emergency Services

6.13  Solution 13: Determine Location & Country InfoWord‑p. 22

6.14  Solution 14: Overall procedure

6.15  Solution 15: Authenticated UE leveraging indication of ePDG/TWAN support for emergency servicesWord‑p. 24

6.16  Solution 16: Support of emergency services by TWAN

6.17  Solution 17: Support of Mobility with 3GPP access (EPC).Word‑p. 28

6.18  Solution 18 for Key issue 3: ePDG Push of location information to LRF/LS at emergency attachment/De-attachmentWord‑p. 33

6.19  Solution 19: Support of emergency services for un-authenticated UEWord‑p. 34

6.20  Solution 20: Support of emergency services for un-authenticated UE on S2b

6.21  Solution 21: Access Selection for Emergency SessionsWord‑p. 45

6.22  Solution 22: Local Emergency Numbers List over WLAN accessWord‑p. 46

6.23  Solution 23 for Key issue 3: Using the emergency signalling channel for on-demand UE Location update mid-session.

6.24  Solution 24: ePDG selection for emergency bearer servicesWord‑p. 47

6.25  Solution 25 for Key issue 3: Network Initiated IKE-based WiFi Query for on-demand UE Location mid-emergency session.Word‑p. 50

6.26  Solution 26 for Key Issue 1: ePDG Selection for emergency servicesWord‑p. 51

6.27  Solution 27 for Key issue 3: NPLI for Untrusted WiFi emergency sessions

6.28  Solution 28: ePDG Selection for emergency services in phase 2Word‑p. 52

6.29  Solution 29 for Key Issue 12: handover of an active emergency call from WLAN to 3GPP CS with E-STN-DRWord‑p. 56

6.30  Solution 30 for Key issue 3: TWAG Push of location information to LRF/LS at emergency attachment/De-attachmentWord‑p. 58

6.31  Solution 31: EIR check reusing the same Principle than in case of regular sessions

6.32  Solution 32: High level principles for emergency ePDG selection reusing the solution defined for regular ePDG selectionWord‑p. 59

7  Overall evaluationWord‑p. 60

8  ConclusionsWord‑p. 62

$  Change HistoryWord‑p. 64


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