Content for TR 29.891 Word version: 16.0.0
7 User Plane Management Procedures over N4
8 Interworking with E-UTRAN connected to EPC
9 Specific Services
10 Other Aspects
11 Conclusions and Recommendations
A Impacts to Specifications
$ Change history
7 User Plane Management Procedures over N4 p. 104
7.1 Requirements p. 104
7.2 Comparison with Sxa/Sxb/Sxc reference points (CUPS in EPC) p. 106
7.2.1 General p. 106
7.2.2 Mapping of N4 requirements to CUPS p. 107
7.2.3 Mapping of CUPS features to N4 p. 111
7.3 Solution and Protocol selection for N4 p. 114
7.3.1 Solution 1 - N4 based on PFCP p. 114
7.3.1.1 Solution Description p. 114
7.3.1.2 Evaluation p. 114
7.3.2 Solution 2 - A new protocol based on PFCP p. 115
7.3.2.1 Solution Description p. 115
7.3.2.2 Evaluation p. 115
7.4 Conclusions p. 115
8 Interworking with E-UTRAN connected to EPC p. 115
8.1 Requirements p. 115
8.1.1 General p. 115
8.1.2 Architecture Overview p. 116
8.1.3 Procedure Requirements for the N26 interface p. 117
8.2 Solution and Protocol Selection p. 118
8.2.1 Solution 1 - N26 interface realized by Reference Point based on S10 interface p. 118
8.2.1.1 Solution Description p. 118
8.2.1.2 Evaluation p. 119
8.2.2 Solution 2 - N26 interface realized by Service Based Interface p. 119
8.2.2.1 Solution Description p. 119
8.2.2.2 Evaluation p. 119
8.2.3 Solution 3 - PGW/SMF address information mapping p. 120
8.2.3.1 General p. 120
8.2.3.2 Assign both PGW S5/S8 F-TEID and SMF N11/N16 URI p. 120
8.2.3.2.1 Solution Description p. 120
8.2.3.2.2 Evaluation p. 120
8.2.3.3 Mapping from PGW S5/S8 F-TEID to SMF N11/N16 URI p. 120
8.2.3.3.1 Solution Description p. 120
8.2.3.3.2 Evaluation p. 120
8.2.3.4 Assign both PGW S5/S8 F-TEID and SMF N11/N16 IP address p. 121
8.2.3.4.1 Solution Description p. 121
8.2.3.4.2 Evaluation p. 121
9 Specific Services p. 122
9.1 SMS services p. 122
9.1.1 Requirements p. 122
9.2 Public Warning System p. 123
9.2.1 Requirements p. 123
9.2.2 Solution and Protocol Selection p. 123
9.3 Location services p. 123
9.3.1 Requirements p. 123
9.3.2 Solution and Protocol Selection p. 123
9.4 IMS support p. 123
9.4.1 Requirements p. 123
9.4.1.1 General Requirements p. 123
9.4.1.2 Paging Policy Differentiation p. 124
9.4.1.3 IMS Emergency Service p. 124
9.4.1.4 Signaling of Homogenous Support of IMS voice over PS session p. 124
9.4.1.5 T-ADS p. 124
9.4.1.6 P-CSCF Restoration p. 124
9.4.2 Solutions p. 124
9.4.2.1 P-CSCF restoration for 5G access p. 124
9.4.2.1.1 Solution 1 - AMF Support of P-CSCF restoration for 5G access p. 124
9.4.2.1.1.1 Solution Description p. 124
9.4.2.1.1.2 Evaluation p. 126
9.4.2.1.2 Solution 2 - SMF Support of P-CSCF restoration for 5G access p. 126
9.4.2.1.2.1 Solution Description p. 126
9.4.2.1.2.2 Evaluation p. 127
9.4.2.2 T-ADS for 5G access p. 127
9.5 Emergency services p. 128
9.5.1 Requirements p. 128
9.5.1.1 General p. 128
9.5.1.2 Architecture Reference Model for Emergency Services p. 129
9.5.1.3 SMF / UPF Selection for Emergency services p. 129
9.5.1.4 IP Address Allocation p. 129
9.5.1.5 Mobility and Access Restriction for Emergency services p. 129
9.5.1.6 QoS for Emergency services p. 129
9.5.1.7 Handling of PDU Sessions for Emergency Services p. 130
9.5.1.8 PCC for Emergency Services p. 130
9.5.2 Solution p. 130
9.6 Multimedia Priority Services p. 131
9.6.1 Requirements p. 131
9.6.2 Solution p. 131
9.7 PEI checking p. 131
9.7.1 Requirements p. 131
9.7.2 Solution and Protocol Selection p. 131
9.8 Mission Critical Services p. 131
9.8.1 Requirements p. 131
9.8.2 Solution p. 131
10 Other Aspects p. 131
10.1 Numbering, Addressing and Identification in 5G System p. 131
10.1.1 General p. 131
10.1.2 Identities in 5G System p. 132
10.1.3 Identifiers for Domain Name System procedures p. 132
10.2 Subscriber data in 5G System p. 132
10.2.1 General p. 132
10.2.2 Subscriber data storage in 5G System p. 132
10.2.3 Definition of Subscriber data in 5G System p. 132
10.2.3.1 Subscriber Permanent Identity p. 132
10.2.3.2 UE Radio Capability p. 132
10.2.3.3 Supported UE Feature list p. 132
10.2.3.4 MM Context p. 132
10.3 Network slicing p. 133
10.3.1 Requirements p. 133
10.3.2 CT4 impacts of Network slicing p. 133
10.4 Impacts due to Virtualization p. 134
10.4.1 General p. 134
10.4.2 Support of stateless NFs p. 134
10.5 Network Sharing p. 139
10.5.1 Requirements p. 139
10.5.2 Solution p. 139
11 Conclusions and Recommendations p. 139
11.1 General p. 139
11.2 User Plane interfaces p. 139
11.3 Control Plane interfaces p. 139
11.4 User Plane Management Procedures over N4 p. 141
11.5 Interworking with E-UTRAN connected to EPC p. 141
11.6 Specific Services p. 142
11.6.1 IMS support p. 142
11.6.1.1 P-CSCF Restoration p. 142
11.6.1.2 T-ADS p. 142
11.7 Other Aspects p. 142
A Impacts to Specifications p. 142
A.1 New specifications p. 142
A.2 Impacted specifications p. 144
$ Change history p. 146
