Content for TR 23.891 Word version: 9.0.0
4 Overall Requirements
5 Architectural Requirements and Considerations
6 Architectural Alternatives
7 Other Considerations
8 Comparison of Architectural Alternatives
9 Conclusions
$ Change history
4 Overall Requirements p. 7
5 Architectural Requirements and Considerations p. 8
5.1 Basic Assumptions p. 8
5.2 Architectural Requirements p. 9
5.3 Session Scenarios p. 10
6 Architectural Alternatives p. 10
6.1 Architectural Alternative #1 p. 10
6.1.1 Objectives p. 10
6.1.2 Architectural Details p. 10
6.1.2.1 Architecture for NI-LR p. 10
6.1.2.2 Architecture for MT-LR and MO-LR p. 11
6.1.2.3 Provision of MME Address to GMLC for an NI-LR p. 11
6.1.3 Information Flows and Protocols p. 12
6.1.3.1 Location Support for IMS Emergency Calls p. 12
6.1.3.2 Location Procedure between the GMLC and E-SMLC p. 13
6.1.3.3 Network Based Positioning Procedure p. 15
6.1.3.4 UE Assisted and UE Based Positioning Procedure p. 17
6.1.3.5 Location Continuity for Handover in the PS Domain p. 18
6.1.3.5.1 Support of Intra E-UTRAN E-Node B Handover using X2 Interface p. 18
6.1.3.5.2 Support of Intra E-UTRAN E-Node B Handover using S1 Interface p. 19
6.1.3.5.3 Variant 1: Target MME/SGSN notification of MME/SGSN Relocation p. 20
6.1.3.5.4 Variant 2: Source MME/SGSN notification of MME/SGSN Relocation p. 23
6.1.3.6 Location Continuity for Emergency Call Handover between PS and CS Domains p. 26
6.1.3.7 MT-LR Procedure p. 26
6.1.3.8 Support of an MO-LR p. 27
6.1.4 Evaluation p. 28
6.2 Architectural Alternative #2 p. 29
6.2.1 Objectives p. 29
6.2.2 Architectural Details p. 29
6.2.2.1 Architecture for NI-LR p. 29
6.2.2.2 Architecture for MT-LR and MO-LR p. 30
6.2.2.3 Provision of MME Address to GMLC for an NI-LR p. 30
6.2.3 Information Flows and Protocols p. 31
6.2.3.1 Location Support for IMS Emergency Calls p. 31
6.2.3.2 Location Procedure between the GMLC, MME and E-SMLC p. 31
6.2.3.3 Network Based Positioning Procedure p. 33
6.2.3.4 UE Assisted and UE Based Positioning Procedure p. 34
6.2.3.5 Location Continuity for Handover in the PS Domain p. 35
6.2.3.5.1 Support of Intra E-UTRAN E-Node B Handover using X2 Interface p. 35
6.2.3.5.2 Support of Intra E-UTRAN E-Node B Handover using S1 Interface p. 35
6.2.3.5.3 Variant 1: Target MME/SGSN notification of MME/SGSN Relocation p. 35
6.2.3.5.4 Variant 2: Source MME/SGSN notification of MME/SGSN Relocation p. 36
6.2.3.6 Location Continuity for Emergency Call Handover between PS and CS Domains p. 39
6.2.3.7 MT-LR Procedure p. 39
6.2.3.8 Support of an MO-LR p. 39
6.2.4 Evaluation p. 40
6.2.5 User Plane interworking p. 41
6.3 Architectural Alternative #3 p. 43
6.3.1 Objectives p. 43
6.3.2 Architectural Details p. 43
6.3.2.1 Architecture for NI-LR p. 43
6.3.2.2 Architecture for MT-LR and MO-LR p. 43
6.3.2.3 Provision of MME Address to GMLC for an NI-LR p. 44
6.3.3 Information Flows and Protocols p. 44
6.3.3.1 Location Support for IMS Emergency Calls p. 44
6.3.3.2 Location Procedure between the GMLC, MME, eNodeB and E-SMLC p. 44
6.3.3.3 Network Based Positioning Procedure p. 46
6.3.3.4 UE Assisted and UE Based Positioning Procedure - Variant 1 p. 47
6.3.3.5 UE Assisted and UE Based Positioning Procedure - Variant 2 p. 47
6.3.3.6 Location Continuity for Emergency Call Handover in the PS Domain p. 48
6.3.3.7 Location Continuity for Emergency Call Handover between PS and CS Domains p. 49
6.3.3.8 MT-LR Procedure p. 49
6.3.3.9 Support of an MO-LR p. 49
6.3.4 Evaluation p. 50
6.4 Architectural Alternative #4 p. 50
6.4.1 Objectives p. 50
6.4.2 Architectural Details p. 51
6.4.3 Information Flows and Protocols p. 51
6.4.4 Evaluation p. 52
6.5 Architectural Alternative #5 p. 52
6.5.1 Objectives p. 52
6.5.2 Architectural Details p. 52
6.5.2.1 Architecture for NI-LR p. 52
6.5.2.2 Architecture for MT-LR and MO-LR p. 53
6.5.2.3 Provision of MME Address to GMLC for an NI-LR p. 53
6.5.3 Information Flows and Protocols p. 54
6.5.3.1 Location Support for IMS Emergency Calls p. 54
6.5.3.2 Location Procedure between the GMLC, MME and E-SMLC p. 54
6.5.3.3 MT-LR Network Based Positioning Procedure p. 55
6.5.3.4 NI-LR Network Based Positioning Procedure p. 56
6.5.3.5 UE Assisted and UE Based Positioning Procedure for emergency session positioning p. 57
6.5.3.6 Location Continuity for Emergency Call Handover in the PS Domain p. 58
6.5.3.6.1 Support of Intra E-UTRAN E-Node B Handover using X2 interface p. 58
6.5.3.6.2 Support of Intra E-UTRAN E-Node B Handover using S1 interface p. 58
6.5.3.6.3 Support of Intra E-UTRAN MME Relocation p. 58
6.5.3.6.4 UTRAN to E-UTRAN Relocation (Emergency Location Only) p. 58
6.5.3.6.5 E-UTRAN to UTRAN Relocation (Emergency Location Only) p. 58
6.5.3.6.6 Variant2: Source MME/SGSN notification of MME/SGSN Relocation p. 58
6.5.3.7 Location Continuity for Emergency Call Handover between PS and CS Domains p. 59
6.5.3.8 MT-LR Procedure p. 59
6.5.3.9 Support of an MO-LR p. 59
6.5.4 Evaluation p. 60
6.5.5 User Plane interworking p. 60
7 Other Considerations p. 62
7.1 QoS p. 62
7.2 Privacy p. 62
7.3 Lawful Intercept ion p. 62
7.4 Location Service Continuity between Radio Access Technologies p. 62
8 Comparison of Architectural Alternatives p. 62
9 Conclusions p. 63
$ Change history p. 64
