Content for TS 29.502 Word version: 18.1.0
5 Services offered by the SMF p. 14
5.1 Introduction p. 14
5.2 Nsmf_PDUSession Service p. 15
5.2.1 Service Description p. 15
5.2.2 Service Operations p. 16
5.2.2.1 Introduction p. 16
5.2.2.2 Create SM Context service operation p. 17
5.2.2.2.1 General p. 17
5.2.2.2.2 EPS to 5GS Idle mode mobility using N26 interface (with or without data forwarding) p. 21
5.2.2.2.3 EPS to 5GS Handover Preparation using N26 interface p. 22
5.2.2.2.4 I-SMF Insertion, Change or Removal during Xn based Handover |R16| p. 23
5.2.2.2.5 I-SMF Insertion, Change or Removal during N2 based Handover |R16| p. 24
5.2.2.2.6 Service Request with I-SMF insertion/change/removal or with V-SMF change |R16| p. 24
5.2.2.2.7 Registration procedure for a UE with a PDU session with I-SMF or V-SMF insertion, change and removal |R16| p. 25
5.2.2.2.8 SMF Context Transfer procedure, LBO or no Roaming, no I-SMF |R16| p. 26
5.2.2.2.9 I-SMF Context Transfer procedure |R16| p. 26
5.2.2.2.10 Handover between 3GPP and non-3GPP accesses with I-SMF insertion/removal or V-SMF change |R16| p. 27
5.2.2.2.11 Void
5.2.2.2.12 SMF triggered I-SMF selection or removal |R17| p. 27
5.2.2.3 Update SM Context service operation p. 28
5.2.2.3.1 General p. 28
5.2.2.3.2 Activation and Deactivation of the User Plane connection of a PDU session p. 31
5.2.2.3.2.1 General p. 31
5.2.2.3.2.2 Activation of User Plane connectivity of a PDU session p. 31
5.2.2.3.2.3 Deactivation of User Plane connectivity of a PDU session p. 33
5.2.2.3.2.4 Changing the access type of a PDU session from non-3GPP access to 3GPP access during a Service Request procedure p. 34
5.2.2.3.3 Xn Handover p. 35
5.2.2.3.4 N2 Handover p. 36
5.2.2.3.4.1 General p. 36
5.2.2.3.4.2 N2 Handover Preparation p. 36
5.2.2.3.4.3 N2 Handover Execution p. 38
5.2.2.3.4.4 N2 Handover Cancellation p. 39
5.2.2.3.5 Handover between 3GPP and untrusted non-3GPP access procedures p. 40
5.2.2.3.5.1 General p. 40
5.2.2.3.5.2 Handover of a PDU session without AMF change or with target AMF in same PLMN p. 40
5.2.2.3.6 Inter-AMF change or mobility p. 41
5.2.2.3.7 RAN Initiated QoS Flow Mobility p. 41
5.2.2.3.8 EPS to 5GS Handover using N26 interface p. 42
5.2.2.3.8.1 General p. 42
5.2.2.3.8.2 EPS to 5GS Handover Preparation p. 42
5.2.2.3.8.3 EPS to 5GS Handover Execution p. 43
5.2.2.3.8.4 EPS to 5GS Handover Cancellation p. 43
5.2.2.3.8.5 EPS to 5GS Handover Failure p. 43
5.2.2.3.9 5GS to EPS Handover using N26 interface p. 43
5.2.2.3.9.1 General p. 43
5.2.2.3.9.2 Data forwarding tunnels setup during 5GS to EPS handover p. 43
5.2.2.3.9.3 Indirect data forwarding tunnels removal for 5GS to EPS handover cancellation or failure p. 44
5.2.2.3.10 P-CSCF Restoration Procedure via AMF p. 45
5.2.2.3.11 AMF requested PDU Session Release due to duplicated PDU Session Id p. 45
5.2.2.3.12 AMF requested PDU Session Release due to slice not available p. 45
5.2.2.3.13 Indirect Data Forwarding Tunnel establishment during N2 based Handover with I-SMF |R16| p. 45
5.2.2.3.13A Indirect Data Forwarding Tunnel removal during N2 based Handover with I-SMF |R16| p. 46
5.2.2.3.14 Request to forward buffered downlink data packets at I-UPF |R16| p. 47
5.2.2.3.15 Connection Suspend procedure |R16| p. 48
5.2.2.3.16 Connection Resume in CM-IDLE with Suspend procedure |R16| p. 48
5.2.2.3.17 AMF requested PDU Session Release due to Network Slice-Specific Authentication and Authorization failure or revocation |R16| p. 49
5.2.2.3.18 5GS to EPS Idle mode mobility using N26 interface with data forwarding |R16| p. 49
5.2.2.3.19 AMF requested PDU Session Release due to Control Plane Only indication associated with PDU Session is not applicable any longer |R16| p. 50
5.2.2.3.20 AMF requested PDU Session Release due to ODB changes |R17| p. 50
5.2.2.3.21 N9 Forwarding Tunnel establishment between Branching Points or UL CLs controlled by different I-SMFs |R17| p. 50
5.2.2.3.22 Remote UE Report during 5G ProSe Communication via 5G ProSe Layer-3 UE-to-Network Relay without N3IWF procedure |R17| p. 51
5.2.2.3.23 AMF requested PDU Session Release due to V/I-SMF failure |R16| p. 51
5.2.2.3.24 Connection Inactive procedure with CN based MT communication handling |R18| p. 52
5.2.2.3.25 UE Triggered Connection Resume in RRC Inactive procedure |R18| p. 52
5.2.2.4 Release SM Context service operation p. 53
5.2.2.4.1 General p. 53
5.2.2.5 Notify SM Context Status service operation p. 55
5.2.2.5.1 General p. 55
5.2.2.6 Retrieve SM Context service operation p. 59
5.2.2.6.1 General p. 59
5.2.2.7 Create service operation p. 61
5.2.2.7.1 General p. 61
5.2.2.7.2 EPS to 5GS Idle mode mobility p. 64
5.2.2.7.3 EPS to 5GS Handover Preparation p. 65
5.2.2.7.4 N2 Handover Preparation with I-SMF Insertion |R16| p. 66
5.2.2.7.5 Xn Handover with I-SMF Insertion |R16| p. 66
5.2.2.7.6 UE Triggered Service Request with I-SMF Insertion |R16| p. 66
5.2.2.8 Update service operation p. 67
5.2.2.8.1 General p. 67
5.2.2.8.2 Update service operation towards H-SMF or SMF p. 68
5.2.2.8.2.1 General p. 68
5.2.2.8.2.2 UE or network (e.g. AMF, V-SMF, I-SMF) requested PDU session modification p. 69
5.2.2.8.2.3 UE requested PDU session release p. 70
5.2.2.8.2.4 EPS to 5GS Handover Execution p. 70
5.2.2.8.2.5 Handover between 3GPP access and untrusted or trusted non-3GPP access p. 71
5.2.2.8.2.6 P-CSCF Restoration Procedure via AMF p. 71
5.2.2.8.2.7 Addition of PSA and BP or UL CL controlled by I-SMF p. 71
5.2.2.8.2.8 Removal of PSA and BP or UL CL controlled by I-SMF p. 72
5.2.2.8.2.9 Change of PSA for IPv6 multi-homing or UL CL controlled by I-SMF p. 72
5.2.2.8.2.10 PDU Session modification with I-SMF or V-SMF change p. 73
5.2.2.8.2.11 Sending by I-SMF of N4 notifications related with traffic usage reporting p. 73
5.2.2.8.2.12 N2 Handover Execution with I-SMF Insertion p. 74
5.2.2.8.2.13 N2 Handover Cancellation with I-SMF Insertion p. 74
5.2.2.8.2.14 EPS to 5GS Handover Cancellation p. 74
5.2.2.8.2.15 5G-AN requested PDU session resource release p. 75
5.2.2.8.2.16 Xn Handover with or without I-SMF or V-SMF Change p. 75
5.2.2.8.2.17 EPS to 5GS Handover Failure p. 75
5.2.2.8.2.18 EPS Bearer ID revocation p. 76
5.2.2.8.2.19 Network requested PDU session release p. 76
5.2.2.8.2.20 N2 Handover Execution with or without I-SMF or V-SMF Change p. 76
5.2.2.8.2.21 Reporting of satellite backhaul change to (H-)SMF p. 76
5.2.2.8.2.22 Simultaneous change of PSA and BP or UL CL controlled by I-SMF p. 77
5.2.2.8.2.23 Service Request without I-SMF/V-SMF Change or with I-SMF/V-SMF Change or with I-SMF Insertion p. 78
5.2.2.8.2.24 Remote UE Report during 5G ProSe Communication via 5G ProSe Layer-3 UE-to-Network Relay without N3IWF p. 79
5.2.2.8.3 Update service operation towards V-SMF or I-SMF p. 79
5.2.2.8.3.1 General p. 79
5.2.2.8.3.2 Network (e.g. H-SMF, SMF) requested PDU session modification p. 80
5.2.2.8.3.3 Network (e.g. H-SMF, SMF) or UE requested PDU session release p. 81
5.2.2.8.3.4 Handover between 3GPP and untrusted non-3GPP access, from 5GC-N3IWF to EPS or from 5GS to EPC/ePDG p. 81
5.2.2.8.3.5 EPS Bearer ID assignment p. 82
5.2.2.8.3.6 Addition of PSA and BP or UL CL controlled by I-SMF p. 82
5.2.2.8.3.7 Removal of PSA and BP or UL CL controlled by I-SMF p. 83
5.2.2.8.3.8 Change of PSA for IPv6 multi-homing or UL CL controlled by I-SMF p. 83
5.2.2.8.3.9 Policy update procedures with an I-SMF p. 84
5.2.2.8.3.10 Simultaneous change of PSA and BP or UL CL controlled by I-SMF p. 84
5.2.2.9 Release service operation p. 85
5.2.2.9.1 General p. 85
5.2.2.10 Notify Status service operation p. 86
5.2.2.10.1 General p. 86
5.2.2.11 Send MO Data service operation |R16| p. 88
5.2.2.11.1 General p. 88
5.2.2.12 Transfer MO Data service operation |R16| p. 89
5.2.2.12.1 General p. 89
5.2.2.13 Transfer MT Data service operation |R16| p. 90
5.2.2.13.1 General p. 90
5.2.2.14 Retrieve service operation |R16| p. 90
5.2.2.14.1 General p. 90
5.2.3 General procedures p. 91
5.2.3.1 Transfer of NAS SM information between UE and H-SMF for Home Routed PDU sessions p. 91
5.2.3.2 Transfer of NAS SM information between UE and SMF for PDU sessions with an I-SMF |R16| p. 92
5.2.3.2.1 General p. 92
5.2.3.3 Detection and handling of late arriving requests |R16| p. 92
5.2.3.3.1 Handling of requests which collide with an existing SM context or PDU session context p. 92
5.2.3.3.1.1 General p. 92
5.2.3.3.1.2 Principles p. 92
5.2.3.3.2 Detection and handling of requests which have timed out at the HTTP client p. 93
5.2.3.3.2.1 General p. 93
5.2.3.4 UE Location Information |R16| p. 93
