Content for TR 24.811 Word version: 17.1.0
5 Key Issues p. 12
5.1 Key Issue #1: Notification of Disaster Condition to the UE p. 12
5.1.1 Description p. 12
5.2 Key Issue #2: Notification of applicability on Disaster Condition to PLMNs without Disaster Condition p. 13
5.2.1 Description p. 13
5.3 Key Issue #3: Indication of accessibility from other PLMNs without Disaster Condition to the UE p. 14
5.3.1 Description p. 14
5.4 Key Issue #4: Registration to the roaming PLMN without Disaster Condition in case of Disaster Condition p. 14
5.4.1 Description p. 14
5.5 Key issue #5: PLMN selection when a "Disaster Condition" applies p. 15
5.5.1 Description p. 15
5.6 Key Issue #6: Notification that Disaster Condition is no longer applicable to the UEs p. 15
5.6.1 Description p. 15
5.7 Key Issue #7: Prevention of signalling overload in PLMNs without Disaster Condition p. 16
5.7.1 Description p. 16
5.8 Key Issue #8: Prevention of signalling overload by returning UEs in PLMN previously with Disaster Condition p. 17
5.8.1 Description p. 17
5.9 Key Issue #9: Handling of Disaster inbound roaming PLMNs in Manual PLMN selection p. 18
5.9.1 Description p. 18
6 Solutions p. 18
6.0 Mapping Solutions to Key Issues p. 18
6.1 Solution #1: Indicating to the UE, via non-3GPP access, the applicability of a disaster condition to the 3GPP access of the same PLMN p. 20
6.1.1 Description p. 20
6.1.1.1 Introduction p. 20
6.1.1.2 Detailed description p. 20
6.1.2 Impacts on existing nodes and functionality p. 21
6.2 Solution #2: Notification of Disaster Condition to the UE via Non-3GPP Access p. 21
6.2.1 Description p. 21
6.2.1.1 Introduction p. 21
6.2.1.2 Detailed description p. 22
6.2.2 Impacts on existing nodes and functionality p. 26
6.3 Solution #3: Notification of Disaster Condition to the UE by RAN sharing p. 26
6.4 Solution #4: Disaster condition information delivered to UE via broadcast p. 27
6.4.1 Introduction p. 27
6.4.2 Detailed description p. 27
6.4.3 Impacts on existing nodes and functionality p. 27
6.5 Solution #5 p. 28
6.5.1 Description p. 28
6.5.1.1 Introduction p. 28
6.5.1.2 Detailed description p. 28
6.5.2 Impacts on existing nodes and functionality p. 28
6.6 Solution #6: O&M-based solution for Key Issue #2 p. 28
6.6.1 Introduction p. 28
6.6.2 Solution description p. 28
6.6.3 Impacts on existing nodes and functionality p. 29
6.7 Solution #7 p. 30
6.7.1 Description p. 30
6.7.1.1 Introduction p. 30
6.7.1.2 Detailed description p. 30
6.7.2 Impacts on existing nodes and functionality p. 30
6.8 Solution #8 p. 30
6.8.1 Description p. 30
6.8.1.1 Introduction p. 30
6.8.1.2 Detailed description p. 30
6.8.2 Impacts on existing nodes and functionality p. 32
6.9 Solution #9: Notification of applicability on Disaster Condition to PLMNs without Disaster Condition by RAN sharing p. 32
6.10 Solution #10: Indication of accessibility from other PLMNs without Disaster Condition to the UE by RAN sharing p. 33
6.11 Solution #11: DRS-supported PLMN list p. 33
6.11.1 Introduction p. 33
6.11.2 Detailed description p. 34
6.11.3 Impacts on existing nodes and functionality p. 34
6.12 Solution #12: Broadcast of disaster roaming indication p. 34
6.13 Solution #13 p. 35
6.13.1 Description p. 35
6.13.1.1 Introduction p. 35
6.13.1.2 Detailed description p. 35
6.13.2 Impacts on existing nodes and functionality p. 36
6.14 Solution #14 p. 36
6.14.1 Description p. 36
6.14.1.1 Introduction p. 36
6.14.1.2 Detailed description p. 36
6.14.2 Impacts on existing nodes and functionality p. 37
6.15 Solution #15: List if PLMNs to be used while in Disaster condition p. 37
6.15.1 General p. 37
6.15.2 Solution description p. 37
6.15.3 Impacts on existing nodes and functionality p. 38
6.16 Solution #16: Solution for indication of accessibility from other PLMNs without Disaster Condition to the UE and for prevention of signalling overload in PLMNs without Disaster Condition using Access Identities p. 38
6.16.1 Introduction p. 38
6.16.2 Detailed description p. 38
6.16.3 Impacts on existing nodes and functionality p. 39
6.17 Solution #17: Confining the service area of an inbound disaster roaming UE to the area of the disaster condition p. 40
6.17.1 Description p. 40
6.17.1.1 Introduction p. 40
6.17.1.2 Detailed description p. 40
6.17.2 Impacts on existing nodes and functionality p. 41
6.18 Solution #18: Registration to the roaming PLMN without Disaster Condition in case of Disaster Condition via shared RAN p. 41
6.19 Solution #19 p. 41
6.19.1 General p. 41
6.19.2 Solution description p. 42
6.19.3 Impacts on existing nodes and functionality p. 42
6.20 Solution #20 p. 42
6.20.1 Description p. 42
6.20.1.1 Introduction p. 42
6.20.1.2 Detailed description p. 43
6.20.2 Impacts on existing nodes and functionality p. 44
6.21 Solution #21: Solution for PLMN selection when a "Disaster Condition" applies p. 44
6.21.1 Introduction p. 44
6.21.2 Detailed description p. 44
6.21.3 Impacts on existing nodes and functionality p. 46
6.22 Solution #22: Considerations for PLMN selection when a "Disaster Condition" applies p. 46
6.23 Solution #23 p. 47
6.23.1 Description p. 47
6.23.1.1 Introduction p. 47
6.23.1.2 Detailed description p. 47
6.23.2 Impacts on existing nodes and functionality p. 48
6.24 Solution #24 p. 48
6.24.1 General p. 48
6.24.2 Solution description p. 48
6.24.3 Impacts on existing nodes and functionality p. 49
6.25 Solution #25 p. 49
6.25.1 Introduction p. 49
6.25.2 Detailed description p. 49
6.25.3 Impacts on existing nodes and functionality p. 50
6.26 Solution #26: PLMN selection base on DRS-Supported PLMN list p. 50
6.26.1 Introduction p. 50
6.26.2 Detailed description p. 50
6.26.3 Impacts on existing nodes and functionality p. 51
6.27 Solution #27: Indicating to the UE, via non-3GPP access, the end of a disaster condition that was applicable to the 3GPP access of the same PLMN p. 51
6.27.1 Description p. 51
6.27.1.1 Introduction p. 51
6.27.1.2 Detailed description p. 51
6.27.2 Impacts on existing nodes and functionality p. 52
6.28 Solution #28: Solution for notification that Disaster Condition is no longer applicable to the UEs p. 52
6.28.1 Introduction p. 52
6.28.2 Detailed description p. 53
6.28.3 Impacts on existing nodes and functionality p. 53
6.29 Solution #29: O&M-based solution for Key Issue #6 p. 54
6.29.1 Introduction p. 54
6.29.2 Solution description p. 54
6.29.3 Impacts on existing nodes and functionality p. 56
6.30 Solution #30: UE-based solution for Key Issue #6 p. 56
6.30.1 Introduction p. 56
6.30.2 Solution description p. 56
6.30.3 Impacts on existing nodes and functionality p. 57
6.31 Solution #31 p. 58
6.31.1 Introduction p. 58
6.31.2 Detailed description p. 58
6.31.3 Impacts on existing nodes and functionality p. 58
6.32 Solution #32: The quick return to PLMN with Disaster Condition p. 59
6.32.1 Introduction p. 59
6.32.2 Detailed description p. 59
6.32.3 Impacts on existing nodes and functionality p. 59
6.33 Solution #33 p. 60
6.33.1 Description p. 60
6.33.1.1 Introduction p. 60
6.33.1.2 Detailed description p. 60
6.33.2 Impacts on existing nodes and functionality p. 60
6.34 Solution #34 p. 60
6.34.1 Description p. 60
6.34.1.1 Introduction p. 60
6.34.1.2 Detailed description p. 61
6.34.2 Impacts on existing nodes and functionality p. 61
6.35 Solution #35: Notification that Disaster Condition is no longer applicable to the UEs by stopping RAN sharing p. 61
6.36 Solution #36 p. 62
6.36.1 Introduction p. 62
6.36.2 Detailed description p. 62
6.36.3 Impacts on existing nodes and functionality p. 62
6.37 Solution #37: Enabling a PLMN without Disaster Condition to efficiently prevent Disaster Inbound Roamers from attempting registration on the PLMN when the PLMN can no longer accept Disaster Inbound Roamers due to congestion p. 62
6.37.1 Introduction p. 62
6.37.2 Detailed description p. 63
6.37.3 Impacts on existing nodes and functionality p. 63
6.38 Solution #38: Prevention of signalling overload via barring factor for Access Identity 3 p. 63
6.39 Solution #39: Solution for prevention of signalling overload in PLMNs without Disaster Condition by providing disaster roaming assistance information to distribute roamers, and congestion mitigation p. 64
6.39.1 Introduction p. 64
6.39.2 Detailed description p. 64
6.39.2.1 Distribution of subscribers of the PLMN with Disaster Condition between the PLMNs without Disaster Condition p. 64
6.39.2.2 Staggering of arrival of Disaster Inbound Roamers p. 65
6.39.2.3 Congestion mitigation in PLMNs without Disaster Condition p. 65
6.39.3 Impacts on existing nodes and functionality p. 66
6.40 Solution #40: Enhancements to UAC barring information to prevent congestion in disaster roaming PLMN p. 66
6.41 Recommended PLMN without Disaster Condition p. 67
6.41.1 Introduction p. 67
6.41.2 Detailed description p. 67
6.41.3 Impacts on existing nodes and functionality p. 68
6.42 Solution #42 p. 68
6.42.1 Description p. 68
6.42.1.1 Introduction p. 68
6.42.1.2 Detailed description p. 68
6.42.2 Impacts on existing nodes and functionality p. 69
6.43 Solution #43: List if PLMNs to be used while in Disaster condition p. 69
6.43.1 General p. 69
6.43.2 Solution description p. 69
6.43.3 Impacts on existing nodes and functionality p. 70
6.44 Solution #44: Staggering of returning UEs trying to register in the PLMN previously with Disaster Condition p. 70
6.44.1 Introduction p. 70
6.44.2 Detailed description p. 70
6.44.3 Impacts on existing nodes and functionality p. 70
6.45 Solution #45: Prevention of signalling overload by returning UEs p. 71
6.46 Solution #46: Solution for prevention of signalling overload by returning UEs in PLMN previously with Disaster Condition p. 71
6.46.1 Introduction p. 71
6.46.2 Detailed description p. 71
6.46.3 Impacts on existing nodes and functionality p. 72
6.47 Solution #47: Network controlled return of UEs at the end of disaster condition p. 73
6.48 Solution #48 p. 74
6.48.1 Description p. 74
6.48.1.1 Introduction p. 74
6.48.1.2 Detailed description p. 74
6.48.2 Impacts on existing nodes and functionality p. 75
6.49 Solution #49: Minimum wait timer p. 75
6.49.1 Solution description p. 75
6.49.2 Solution description p. 75
6.49.3 Impacts on existing nodes and functionality p. 75
6.50 Solution #50: Providing information to the RAN of PLMN A p. 75
6.50.1 Introduction p. 75
6.50.2 Detailed description p. 76
6.50.3 Impacts on existing nodes and functionality p. 76
6.51 Solution #51: PLMN selection when shared RAN is available in case of disaster condition p. 76
6.52 Solution #52: New solution to KI#4: Using the existing mobility restriction list to confine the UE service area in disaster roaming PLMN to the area of the disaster condition p. 76
6.52.1 Description p. 76
6.52.1.1 Introduction p. 76
6.52.1.2 Detailed description p. 77
6.52.2 Impacts on existing nodes and functionality p. 77
6.53 Solution #53: Staggering of UEs trying to register in the PLMN without Disaster Condition p. 77
6.53.1 Introduction p. 77
6.53.2 Detailed description p. 77
6.53.3 Impacts on existing nodes and functionality p. 78
6.54 Solution #54: Preventing 5GSM-level congestion on a PLMN without a disaster condition p. 78
6.54.1 Description p. 78
6.54.1.1 Introduction p. 78
6.54.1.2 Detailed description p. 78
6.54.2 Impacts on existing nodes and functionality p. 79
6.55 Solution #55 p. 80
6.55.1 Description p. 80
6.55.1.1 Introduction p. 80
6.55.1.2 Detailed description p. 80
6.55.2 Impacts on existing nodes and functionality p. 80
6.56 Solution #56: Solution for manual PLMN selection when a "Disaster Condition" applies p. 80
6.56.1 Introduction p. 80
6.56.2 Detailed description p. 80
6.56.3 Impacts on existing nodes and functionality p. 80
6.57 Solution #57: Registration to PLMN providing Disaster Roaming service and to PLMN with Disaster Condition when no roaming interfaces are in place p. 81
6.58 Solution #58: Transitioning to Connected Mode over non-3GPP access by a UE in Idle Mode p. 84
6.58.1 Introduction p. 84
6.58.2 Detailed description p. 84
6.58.3 Impacts on existing nodes and functionality p. 84
6.59 Solution #59 p. 84
6.59.1 Description p. 84
6.59.1.1 Introduction p. 84
6.59.1.2 Detailed description p. 85
6.59.2 Impacts on existing nodes and functionality p. 85
6.60 Solution #60: Manual PLMN selection during disaster condition p. 85
7 Evaluations p. 86
7.1 Evaluation on solutions of Key Issue #1 p. 86
7.2 Evaluation on solutions of Key Issue #2 p. 88
7.3 Evaluation on solutions of Key Issue #3 p. 88
7.4 Evaluation on solutions of Key Issue #4 p. 91
7.5 Evaluation on solutions of Key Issue #5 p. 93
7.6 Evaluation on solutions of Key Issue #6 p. 95
7.7 Evaluation on solutions of Key Issue #7 p. 97
7.8 Evaluation on solutions of Key Issue #8 p. 103
7.9 Evaluation on solutions of Key Issue #9 p. 106
8 Conclusions p. 106
8.1 Conclusions on Key Issue #1 p. 106
8.2 Conclusions on Key Issue #2 p. 107
8.3 Conclusions on Key Issue #3 p. 107
8.4 Conclusions on Key Issue #4 p. 108
8.5 Conclusions on Key Issue #5 p. 108
8.6 Conclusions on Key Issue #6 p. 109
8.7 Conclusions on Key Issue #7 p. 109
8.8 Conclusions on Key Issue #8 p. 110
8.9 Conclusions on Key Issue #9 p. 110
$ Change history p. 112
