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TECHNICAL SPECIFICATION
LTE;
Interface between the Control Plane and the User Plane nodes
(3GPP TS 29.244 version 14.5.0 Release 14)
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3GPP TS 29.244 version 14.5.0 Release 14 1 ETSI TS 129 244 V14.5.0 (2018-10)
Reference
RTS/TSGC-0429244ve50
Keywords
LTE
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3GPP TS 29.244 version 14.5.0 Release 14 2 ETSI TS 129 244 V14.5.0 (2018-10)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
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Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
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3GPP TS 29.244 version 14.5.0 Release 14 3 ETSI TS 129 244 V14.5.0 (2018-10)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 10
1 Scope . 11
2 References . 11
3 Definitions, symbols and abbreviations . 12
3.1 Definitions . 12
3.2 Abbreviations . 12
4 Protocol Stack . 13
4.1 Introduction . 13
4.2 UDP Header and Port Numbers . 14
4.2.1 General . 14
4.2.2 Request Message . 14
4.2.3 Response Message . 14
4.3 IP Header and IP Addresses . 14
4.3.1 General . 14
4.3.2 Request Message . 14
4.3.3 Response Message . 15
4.4 Layer 2 . 15
4.5 Layer 1 . 15
5 General description. 15
5.1 Introduction . 15
5.2 Packet Forwarding Model . 15
5.2.1 General . 15
5.2.1A Packet Detection Rule Handling . 17
5.2.1A.1 General . 17
5.2.1A.2 PDI Optimization . 17
5.2.1A.2A Provisioning of SDF filters . 18
5.2.1A.3 Bidirectional SDF Filters . 18
5.2.2 Usage Reporting Rule Handling . 19
5.2.2.1 General . 19
5.2.2.2 Provisioning of Usage Reporting Rule in the UP function . 19
5.2.2.2.1 General . 19
5.2.2.2.2 Credit pooling . 22
5.2.2.3 Reporting of Usage Report to the CP function . 22
5.2.2.3.1 General . 22
5.2.2.3.2 Credit pooling . 25
5.2.2.4 Reporting of Linked Usage Reports to the CP function . 25
5.2.3 Forwarding Action Rule Handling . 25
5.2.3.1 General . 25
5.2.4 Buffering Action Rule Handling . 26
5.2.4.1 General . 26
5.2.4.2 Provisioning of Buffering Action Rule in the UP function . 27
5.2.5 QoS Enforcement Rule Handling . 27
5.2.5.1 General . 27
5.2.5.2 Provisioning of QoS Enforcement Rule in the UP function . 27
5.2.6 Combined SGW/PGW Architecture . 27
5.3 Data Forwarding between the CP and UP Functions . 28
5.3.1 General . 28
5.3.2 Sending of End Marker Packets . 28
5.3.3 Forwarding of Packets Subject to Buffering in the CP Function . 29
5.3.3.1 General . 29
5.3.3.2 Forwarding of Packets from the UP Function to the CP Function . 29
ETSI
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3GPP TS 29.244 version 14.5.0 Release 14 4 ETSI TS 129 244 V14.5.0 (2018-10)
5.3.3.3 Forwarding of Packets from the CP Function to the UP Function . 30
5.3.4 Data Forwarding between the CP and UP Functions with one Sx-u Tunnel per UP Function or PDN . 30
5.3.4.1 General . 30
5.3.4.2 Forwarding of Packets from the UP Function to the CP Function . 30
5.3.4.3 Forwarding of Packets from the CP Function to the UP Function . 30
5.4 Policy and Charging Control . 31
5.4.1 General . 31
5.4.2 Service Detection and Bearer Binding . 31
5.4.3 Gating Control . 31
5.4.4 QoS Control . 31
5.4.5 DL Flow Level Marking for Application Detection . 32
5.4.6 Usage Monitoring . 32
5.4.7 Traffic Redirection . 33
5.4.8 Traffic Steering . 33
5.4.9 Provisioning of Predefined PCC/ADC Rules . 34
5.4.10 Charging . 35
5.4.11 (Un)solicited Application Reporting . 35
5.4.12 Service Identification for Improved Radio Utilisation for GERAN . 36
5.4.13 Transport Level Marking . 36
5.5 F-TEID Allocation and Release . 36
5.5.1 General . 36
5.5.2 F-TEID allocation in the CP function . 37
5.5.3 F-TEID allocation in the UP function . 37
5.6.1 General . 37
5.6.2 Session Endpoint Identifier Handling . 37
5.6.3 Modifying the Rules of an Existing Sx Session . 37
5.7 Support of Lawful Interception . 38
5.8 Sx Association . 38
5.8.1 General . 38
5.8.2 Behaviour with an Established Sx Association . 38
5.8.3 Behaviour without an Established Sx Association. 39
5.9 Usage of Vendor-specific IE . 39
5.10 Error Indication Handling . 39
5.11 User plane inactivity detection and reporting . 40
5.12 Suspend and Resume Notification procedures . 40
5.13 Void . 40
5.14 Support IPv6 Prefix Delegation. 40
6 Procedures . 40
6.1 Introduction . 40
6.2 Sx Node Related Procedures . 40
6.2.1 General . 40
6.2.2 Heartbeat Procedure . 40
6.2.2.1 General . 40
6.2.2.2 Heartbeat Request . 41
6.2.2.3 Heartbeat Response . 41
6.2.3 Load Control Procedure . 41
6.2.3.1 General . 41
6.2.3.2 Principles . 41
6.2.3.3 Load Control Information . 41
6.2.3.3.1 General Description . 41
6.2.3.3.2 Parameters . 42
6.2.3.3.2.1 Load Control Sequence Number . 42
6.2.3.3.2.2 Load Metric. 42
6.2.3.3.3 Frequency of Inclusion . 43
6.2.4 Overload Control Procedure . 43
6.2.4.1 General . 43
6.2.4.2 Principles . 43
6.2.4.3 Overload Control Information . 44
6.2.4.3.1 General Description . 44
6.2.4.3.2 Parameters . 45
6.2.4.3.2.1 Overload Control Sequence Number . 45
ETSI
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3GPP TS 29.244 version 14.5.0 Release 14 5 ETSI TS 129 244 V14.5.0 (2018-10)
6.2.4.3.2.2 Period of Validity . 45
6.2.4.3.2.3 Overload Reduction Metric . 46
6.2.4.3.3 Frequency of Inclusion . 46
6.2.4.4 Message Throttling. 47
6.2.4.4.1 General . 47
6.2.4.4.2 Throttling algorithm – "Loss" . 47
6.2.4.4.2.1 Description . 47
6.2.4.5 Message Prioritization . 47
6.2.4.5.1 Description . 47
6.2.4.5.2 Based on the Message Priority Signalled in the PFCP Message . 48
6.2.5 Sx PFD Management Procedure . 48
6.2.5.1 General . 48
6.2.5.2 CP Function Behaviour . 48
6.2.5.3 UP Function Behaviour . 49
6.2.6 Sx Association Setup Procedure . 49
6.2.6.1 General . 49
6.2.6.2 Sx Association Setup Initiated by the CP Function. 49
6.2.6.2.1 CP Function Behaviour . 49
6.2.6.2.2 UP Function behaviour . 49
6.2.6.3 Sx Association Setup Initiated by the UP Function . 50
6.2.6.3.1 UP Function Behaviour . 50
6.2.6.3.2 CP Function Behaviour . 50
6.2.7 Sx Association Update Procedure . 50
6.2.7.1 General . 50
6.2.7.2 Sx Association Update Procedure Initiated by the CP Function . 50
6.2.7.2.1 CP Function Behaviour . 50
6.2.7.2.2 UP Function Behaviour . 50
6.2.7.3 Sx Association Update Procedure Initiated by UP Function . 51
6.2.7.3.1 UP Function Behaviour . 51
6.2.7.3.2 CP Function Behaviour . 51
6.2.8 Sx Association Release Procedure . 51
6.2.8.1 General . 51
6.2.8.2 CP Function Behaviour . 51
6.2.8.3 UP Function behaviour . 51
6.2.9 Sx Node Report Procedure . 52
6.2.9.1 General . 52
6.2.9.2 UP Function Behaviour . 52
6.2.9.3 CP Function behaviour . 52
6.3 Sx Session Related Procedures . 52
6.3.1 General . 52
6.3.2 Sx Session Establishment Procedure . 52
6.3.2.1 General . 52
6.3.2.2 CP Function Behaviour .
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