ETSI TS 129 244 V18.6.0 (2024-07)

LTE; 5G; Interface between the Control Plane and the User Plane nodes (3GPP TS 29.244 version 18.6.0 Release 18)

RTS/TSGC-0429244vi60

General Information

• Status: Not Published
• Technical Committee: 3GPP CT 4 - MAP/CAMEL/GTP/BCH/SS/TrFO/IMS/GUP/WLAN (formely CN4)
• Current Stage: 12 - Citation in the OJ (auto-insert)
• Completion Date: 25-Jul-2024

Standards Content (Sample)

TECHNICAL SPECIFICATION
LTE;
5G;
Interface between the Control Plane and the User Plane nodes
(3GPP TS 29.244 version 18.6.0 Release 18)

3GPP TS 29.244 version 18.6.0 Release 18 1 ETSI TS 129 244 V18.6.0 (2024-07)

Reference
RTS/TSGC-0429244vi60
Keywords
5G,LTE
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ETSI
3GPP TS 29.244 version 18.6.0 Release 18 2 ETSI TS 129 244 V18.6.0 (2024-07)
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ETSI
3GPP TS 29.244 version 18.6.0 Release 18 3 ETSI TS 129 244 V18.6.0 (2024-07)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 16
1 Scope . 18
2 References . 18
3 Definitions, symbols and abbreviations . 21
3.1 Definitions . 21
3.2 Abbreviations . 22
4 Protocol Stack . 24
4.1 Introduction . 24
4.2 UDP Header and Port Numbers . 25
4.2.1 General . 25
4.2.2 Request Message . 25
4.2.3 Response Message . 25
4.3 IP Header and IP Addresses . 25
4.3.1 General . 25
4.3.2 Request Message . 25
4.3.3 Response Message . 26
4.4 Layer 2 . 26
4.5 Layer 1 . 26
5 General description. 26
5.1 Introduction . 26
5.2 Packet Forwarding Model . 26
5.2.1 General . 26
5.2.1A Packet Detection Rule Handling . 29
5.2.1A.1 General . 29
5.2.1A.2 PDI Optimization . 30
5.2.1A.2A Provisioning of SDF filters . 30
5.2.1A.3 Bidirectional SDF Filters . 31
5.2.1A.4 Application detection with PFD . 31
5.2.2 Usage Reporting Rule Handling . 31
5.2.2.1 General . 31
5.2.2.2 Provisioning of Usage Reporting Rule in the UP function . 32
5.2.2.2.1 General . 32
5.2.2.2.2 Credit pooling (for EPC) . 36
5.2.2.3 Reporting of Usage Report to the CP function . 37
5.2.2.3.1 General . 37
5.2.2.3.2 Credit pooling . 41
5.2.2.3.3 Traffic Usage Reporting with Redundant Transmission . 42
5.2.2.4 Reporting of Linked Usage Reports to the CP function . 42
5.2.2.5 End Marker Reception Reporting . 42
5.2.3 Forwarding Action Rule Handling . 43
5.2.3.1 General . 43
5.2.4 Buffering Action Rule Handling . 45
5.2.4.1 General . 45
5.2.4.2 Provisioning of Buffering Action Rule in the UP function . 45
5.2.4.3 Applying DL Buffering Duration in the CP function . 46
5.2.5 QoS Enforcement Rule Handling . 46
5.2.5.1 General . 46
5.2.5.2 Provisioning of QoS Enforcement Rule in the UP function . 46
5.2.5.3 Reflective QoS (for 5GC) . 47
5.2.6 Combined SGW/PGW Architecture . 47
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5.2.7 Multi-Access Rule Handling (for 5GC) . 47
5.2.7.1 General . 47
5.2.8 Session Reporting Rule Handling . 49
5.2.8.1 General . 49
5.2.8.2 Provisioning of Session Reporting Rule in the UP function . 49
5.2.8.2.1 General . 49
5.2.8.3 Reporting of Session Report to the CP function . 49
5.2.8.3.1 General . 49
5.2.9 Handling of Rules that cannot be activated . 49
5.3 Data Forwarding between the CP and UP Functions . 50
5.3.1 General . 50
5.3.2 Sending of End Marker Packets . 51
5.3.3 Forwarding of Packets Subject to Buffering in the CP Function . 51
5.3.3.1 General . 51
5.3.3.2 Forwarding of Packets from the UP Function to the CP Function . 52
5.3.3.3 Forwarding of Packets from the CP Function to the UP Function . 52
5.3.4 Data Forwarding between the CP and UP Functions with one PFCP-u Tunnel per UP Function or
PDN . 53
5.3.4.1 General . 53
5.3.4.2 Forwarding of Packets from the UP Function to the CP Function . 53
5.3.4.3 Forwarding of Packets from the CP Function to the UP Function . 53
5.3.5 Forwarding of user data using Control Plane CIoT 5GS Optimisation (for 5GC) . 54
5.3.5.1 General . 54
5.3.5.2 Forwarding of Packets from the UP Function to the CP Function . 54
5.3.5.3 Forwarding of Packets from the CP Function to the UP Function . 54
5.4 Policy and Charging Control . 54
5.4.1 General . 54
5.4.2 Service Detection and Bearer/QoS Flow Binding . 55
5.4.3 Gating Control . 55
5.4.4 QoS Control . 56
5.4.5 DL Flow Level Marking for Application Detection . 57
5.4.6 Usage Monitoring . 57
5.4.7 Traffic Redirection . 57
5.4.8 Traffic Steering . 58
5.4.9 Provisioning of Predefined PCC/ADC Rules . 59
5.4.10 Charging . 60
5.4.11 (Un)solicited Application Reporting . 61
5.4.12 Service Identification for Improved Radio Utilisation for GERAN . 62
5.4.13 Transport Level Marking . 62
5.4.14 Deferred PDR activation and deactivation . 62
5.4.15 Packet Rate enforcement . 63
5.4.15.1 General . 63
5.4.15.2 Packet rate enforcement over Sxb and N4 interfaces . 64
5.4.15.3 PGW and SMF behaviour . 64
5.4.16 QoS differentiation for Stand-alone Non-Public Network (SNPN) . 65
5.4.16.1 General . 65
5.4.16.2 Access to PLMN services via SNPN . 65
5.4.16.3 Access to SNPN services via PLMN . 66
5.4.17 QoS differentiation for UEs behind RG . 66
5.5 F-TEID Allocation and Release . 66
5.5.1 General . 66
5.5.2 Void . 66
5.5.3 F-TEID allocation in the UP function . 66
5.6 PFCP Session Handling . 67
5.6.1 General . 67
5.6.2 Session Endpoint Identifier Handling . 67
5.6.3 Modifying the Rules of an Existing PFCP Session . 67
5.7 Support of Lawful Interception . 68
5.7.1 General . 68
5.7.2 Lawful Interception in EPC . 68
5.7.3 Lawful Interception in 5GC . 68
5.8 PFCP Association . 68
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5.8.1 General . 68
5.8.2 Behaviour with an Established PFCP Association. 69
5.8.3 Behaviour without an Established PFCP Association . 70
5.9 Usage of Vendor-specific IE . 70
5.10 Error Indication Handling . 70
5.11 User plane inactivity detection and reporting . 71
5.11.1 General . 71
5.11.2 User plane inactivity detection and reporting per PDN connection or PDU session . 71
5.11.3 User plane inactivity detection and reporting per PDR . 72
5.12 Suspend and Resume Notification procedures . 72
5.13 Ethernet traffic (for 5GC) . 72
5.13.1 General . 72
5.13.2 Address Resolution Protocol or IPv6 Neighbour Solicitation Response by SMF . 73
5.13.3 Address Resolution Protocol or IPv6 Neighbour Solicitation Response by UPF . 74
5.13.3A Provisioning of MAC addresses and SDF filters in Ethernet Packet Filters . 74
5.13.4 Bidirectional Ethernet Filters . 74
5.13.5 Reporting of UE MAC addresses to the SMF . 75
5.13.6 Ethernet PDU session anchor relocation . 75
5.14 Support IPv6 Prefix Delegation. 75
5.15 Signalling based Trace (De)Activation . 76
5.16 Framed Routing . 76
5.17 5G UPF (for 5GC) . 77
5.17.1 Introduction. 77
5.17.2 Uplink Classifier and Branching Point . 77
5.17.3 Data forwarding during handovers between 5GS and EPS . 77
5.18 Enhanced PFCP Association Release . 78
5.18.1 General . 78
5.18.2 UP Function Initiated PFCP Session Release . 79
5.19 Activation and Deactivation of Pre-defined PDRs . 79
5.20 Support of Access Traffic Steering, Switching and Splitting (ATSSS) for 5GC . 80
5.20.1 General . 80
5.20.2 MPTCP functionality . 81
5.20.2.1 General . 81
5.20.2.2 Activate MPTCP functionality and Exchange MPTCP Parameters . 81
5.20.2.3 Control of Multipath TCP Connection Establishment by MPTCP Proxy . 82
5.20.2.4 Traffic Steering and IP Translation by MPTCP Proxy . 82
5.20.2A MPQUIC functionality . 82
5.20.2A.1 General . 82
5.20.2A.2 Activate MPQUIC functionality and Exchange MPQUIC Parameters . 83
5.20.2A.3 Control of Multipath QUIC Connection Establishment by MPQUIC Proxy . 83
5.20.2A.4 Traffic Steering and IP Translation by MPQUIC Proxy . 84
5.20.3 ATSSS-LL functionality . 84
5.20.3.1 Activate ATSSS-LL functionality and Exchange ATSSS-LL Parameters . 84
5.20.4 Handling of GBR traffic of a MA PDU session . 85
5.20.4.1 General . 85
5.20.4.2 Access Availability Reporting . 85
5.20.5 Access type of an MA PDU session becoming (un)available . 85
5.20.6 PMFP message handling in UPF . 86
5.21 UE IP address/prefix Allocation and Release . 86
5.21.1 General . 86
5.21.2 UE IP address/prefix allocation in the CP function . 87
5.21.2.1 General . 87
5.21.2.2 UE IP Address/prefix allocation using DHCP or AAA server . 87
5.21.3 UE IP address/prefix allocation in the UP function . 88
5.21.3.1 General . 88
5.21.3.2 Reporting UE IP Address Usage to the CP function . 88
5.22 PFCP sessions successively controlled by different SMFs of an SMF set (for 5GC) . 89
5.22.1 General . 89
5.22.2 With one PFCP association per SMF Set and UPF. 89
5.22.3 With one PFCP association per SMF and UPF . 91
5.22.4 Restoration of PFCP Sessions associated with an FQ-CSID, Group ID or PGW-C/SMF IP Address . 92
5.23 5G VN Group Communication (for 5GC) . 93
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5.23.1 General . 93
5.23.2 5G VN group communication without N6-based forwarding . 94
5.24 Support of Ultra Reliable Low Latency Communication for 5GC . 94
5.24.1 General . 94
5.24.2 Redundant Transmission on N3/N9 interfaces . 95
5.24.2.1 General . 95
5.24.2.2 GTP-U tunnel setup for redundant transmission . 95
5.24.2.3 Duplicating downlink packets for redundant transmission . 96
5.24.2.4 Eliminating duplicated uplink packets . 96
5.24.3 Redundant Transmission at transport layer . 96
5.24.4 Per QoS Flow Per UE QoS Monitoring . 96
5.24.4.1 General . 96
5.24.4.2 QoS Monitoring Control . 97
5.24.4.3 QoS Monitoring Reporting . 97
5.24.5 Per GTP-U Path QoS Monitoring . 98
5.24.5.1 General . 98
5.24.5.2 GTP-U path monitoring . 98
5.24.5.3 QoS monitoring of a PDU session based on GTP-U path monitoring . 98
5.24.5.4 QoS Monitoring Reporting . 99
5.25 Support of IPTV (for 5GC) . 99
5.26 Support of Time Sensitive Communication, Time Synchronization, 5GS integration with TSN and
Deterministic Networking (for 5GC) . 100
5.26.1 General . 100
5.26.2 5GS User Plane Node management . 101
5.26.3 Transfer of 5GS user plane node and port management information . 101
5.26.3.1 General . 101
5.26.3.2 Direct Reporting of TSC management information event to TSN AF or TSCTSF. 102
5.26.4 Reporting clock drift between External and 5GS times from UPF to SMF . 102
5.26A Support of TSN enabled Transport Network . 103
5.26A.1 General . 103
5.27 Inter-PLMN User Plane Security . 103
5.28 Downlink data delivery status with UPF buffering (for 5GC) . 104
5.28.1 General . 104
5.29 Support Reliable Data Service . 105
5.30 Notifying Start Pause of Charging . 105
5.31 Support of L2TP . 106
5.31.1 General . 106
5.31.2 L2TP Tunnel and L2TP Session Setup . 107
5.31.3 L2TP Session and L2TP Tunnel Release . 108
5.32 Support of Uplink packets buffering . 108
5.32.1 General . 108
5.32.2 Uplink packets buffering for on-line charging . 108
5.32.3 Uplink packets buffering during EAS relocation . 108
5.33 Support of enhancement of Edge Computing (for 5GC) . 108
5.33.1 General . 108
5.33.2 Uplink packet buffering for low packet loss during EAS relocation . 109
5.33.3 Edge Relocation using EAS IP address and Port number Replacement . 109
5.33.4 EAS Discovery procedure with Local DNS Server/Resolver . 109
5.33.5 Direct Reporting of QoS monitoring events to Local NEF or AF . 109
5.33.6 EAS Discovery procedure with V-EASDF . 110
5.33.7 DNS traffic routing for different UEs with same private UE IP address . 110
5.34 Support of 5G Multicast and Broadcast Service. 111
5.34.1 General . 111
5.34.2 N4mb requirements. 111
5.34.2.1 General . 111
5.34.2.1A PFCP protocol extensions for N4mb . 111
5.34.2.2 Instructing the MB-UPF to forward MBS data using multicast and/or unicast transport . 112
5.34.2.3 Detecting and reporting user plane (in)activity of an MBS session . 113
5.34.2.4 Activation and Deactivation of a Multicast MBS session . 114
5.34.2.5 MBS data usage reporting for MBS charging . 114
5.34.3 N4 requirements . 115
5.34.3.1 General . 115
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5.34.3.2 Instructing the UPF to forward (or stop forwarding) multicast MBS data to associated PDU
sessions . 115
5.34.3.3 Instructing a combined UPF/MBS-UPF to forward multicast MBS data to associated PDU
sessions . 117
5.34.3.4 MBS data usage reporting for MBS charging . 118
5.35 Support of Per Slice UP Resource Allocation and Usage Reporting by the UP Function . 118
5.35.1 General . 118
5.36 Paging Policy Indicator Provisioning . 119
5.36.1 General . 119
5.36.2 Enhanced Paging Policy Indicator Provisioning . 120
5.37 Traffic Parameters Measurement per QoS flow .
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