ETSI
ETSI TS 123 502 V15.2.0 (2018
3GPP TS 23.502 version 15.2.0 Release 15
4.3.2.2.3 SMF selection .................................................................................................................................. 66
4.3.2.3 Secondary authorization/authentication by an DN-AAA server during the PDU Session
establishment ......................................................................................................................................... 69
4.3.3 PDU Session Modification ......................................................................................................................... 72
4.3.3.1 General .................................................................................................................................................. 72
4.3.3.2 UE or network requested PDU Session Modification (non-roaming and roaming with local
breakout) ............................................................................................................................................... 72
4.3.3.3 UE or network requested PDU Session Modification (home-routed roaming) ..................................... 76
4.3.4 PDU Session Release .................................................................................................................................. 78
4.3.4.1 General .................................................................................................................................................. 78
4.3.4.2 UE or network requested PDU Session Release for Non-Roaming and Roaming with Local
Breakout ................................................................................................................................................ 79
4.3.4.3 UE or network requested PDU Session Release for Home-routed Roaming ........................................ 82
4.3.5 Session continuity, service continuity and UP path management ............................................................... 83
4.3.5.1 Change of SSC mode 2 PDU Session Anchor with different PDU Sessions ........................................ 83
4.3.5.2 Change of SSC mode 3 PDU Session Anchor with multiple PDU Sessions ........................................ 84
4.3.5.3 Change of SSC mode 3 PDU Session Anchor with IPv6 Multi-homed PDU Session .......................... 86
4.3.5.4 Addition of additional PDU Session Anchor and Branching Point or UL CL ...................................... 88
4.3.5.5 Removal of additional PDU Session Anchor and Branching Point or UL CL ...................................... 90
4.3.5.6 Change of additional PDU Session Anchor for IPv6 multi-homing or UL CL ..................................... 91
4.3.5.7 Simultaneous change of Branching Point or UL CL and additional PSA for a PDU Session............... 93
4.3.6 Application Function influence on traffic routing ...................................................................................... 95
4.3.6.1 General .................................................................................................................................................. 95
4.3.6.2 Processing AF requests to influence traffic routing for Sessions not identified by an UE address ....... 96
4.3.6.3 Notification of User Plane Management Events ................................................................................... 97
4.3.6.4 Transferring an AF request targeting an individual UE address to the relevant PCF............................ 98
4.3.7 CN-initiated selective deactivation of UP connection of an existing PDU Session .................................... 99
4.4 SMF and UPF interactions ............................................................................................................................. 100
4.4.1 N4 session management procedures ......................................................................................................... 100
4.4.1.1 General ................................................................................................................................................ 100
4.4.1.2 N4 Session Establishment procedure .................................................................................................. 100
4.4.1.3 N4 Session Modification procedure .................................................................................................... 101
4.4.1.4 N4 Session Release procedure ............................................................................................................ 101
4.4.2 N4 Reporting Procedures .......................................................................................................................... 102
4.4.2.1 General ................................................................................................................................................ 102
4.4.2.2 N4 Session Level Reporting Procedure ............................................................................................... 102
4.4.3 N4 Node Level Procedures ....................................................................................................................... 103
4.4.3.1 N4 Association Setup Procedure ......................................................................................................... 103
4.4.3.2 N4 Association Update Procedure ...................................................................................................... 103
4.4.3.3 N4 Association Release Procedure ..................................................................................................... 104
4.4.3.4 N4 Report Procedure ........................................................................................................................... 104
4.4.3.5 N4 PFD management Procedure ......................................................................................................... 105
4.4.4 SMF Pause of Charging procedure ........................................................................................................... 105
4.5 User Profile management procedures ............................................................................................................. 107
4.5.1 Subscriber Data Update Notification to AMF .......................................................................................... 107
4.5.2 Session Management Subscriber Data Update Notification to SMF ........................................................ 107
4.5.3 Purge of subscriber data in AMF .............................................................................................................. 107
4.6 Security procedures ........................................................................................................................................ 108
4.7 ME Identity check procedure ......................................................................................................................... 108
4.8 RAN-CN interactions ..................................................................................................................................... 108
4.8.1 Connection Inactive procedure ................................................................................................................. 108
4.8.2 Connection Resume procedure ................................................................................................................. 108
4.8.3 N2 Notification procedure ........................................................................................................................ 109
4.9 Handover procedures ...................................................................................................................................... 110
4.9.1 Handover procedures in 3GPP access ....................................................................................................... 110
4.9.1.1 General ................................................................................................................................................ 110
4.9.1.2 Xn based inter NG-RAN handover ..................................................................................................... 111
4.9.1.2.1 General .......................................................................................................................................... 111
4.9.1.2.2 Xn based inter NG-RAN handover without User Plane function re-allocation ............................. 111
4.9.1.2.3 Xn based inter NG-RAN handover with insertion of intermediate UPF ....................................... 114
4.9.1.2.4 Xn based inter NG-RAN handover with re-allocation of intermediate UPF ................................. 116
4.9.1.3 Inter NG-RAN node N2 based handover ............................................................................................ 117
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