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TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
Architecture enhancements for control and user plane
separation of EPC nodes
(3GPP TS 23.214 version 15.5.0 Release 15)
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3GPP TS 23.214 version 15.5.0 Release 15 1 ETSI TS 123 214 V15.5.0 (2019-03)
Reference
RTS/TSGS-0223214vf50
Keywords
LTE,UMTS
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3GPP TS 23.214 version 15.5.0 Release 15 2 ETSI TS 123 214 V15.5.0 (2019-03)
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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
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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 23.214 version 15.5.0 Release 15 3 ETSI TS 123 214 V15.5.0 (2019-03)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 6
1 Scope . 7
2 References . 7
3 Definitions and abbreviations . 7
3.1 Definitions . 7
3.2 Abbreviations . 8
4 Architecture model and concepts . 8
4.1 General concepts . 8
4.2 Architecture reference model . 8
4.2.1 Non-roaming and roaming architectures . 8
4.2.2 Combined SGW/PGW architecture . 9
4.2.3 Reference points . 10
4.3 High level functions . 10
4.3.1 General . 10
4.3.2 Functional split of SGW, PGW and TDF . 13
4.3.2.1 Functional split of SGW . 13
4.3.2.2 Functional split of PGW . 15
4.3.2.3 Functional split of TDF . 18
4.3.3 User Plane Function selection . 19
4.3.4 SGW-C Partitioning . 20
4.4 Network elements . 21
4.4.1 General . 21
4.4.2 SGW control plane function . 21
4.4.3 SGW user plane function . 21
4.4.4 PGW control plane function . 21
4.4.5 PGW user plane function . 21
4.4.6 TDF control plane function . 22
4.4.7 TDF user plane function . 22
5 Functional description . 22
5.1 General . 22
5.2 Traffic detection . 22
5.2.1 General . 22
5.2.2 Traffic detection information . 22
5.3 Charging and usage monitoring handling . 23
5.3.1 General . 23
5.3.2 Activation of usage reporting in UP function . 24
5.3.3 Reporting of usage information towards CP function . 24
5.3.4 PGW Pause of Charging . 25
5.4 GTP-U IP address and TEIDu allocation . 25
5.4.1 General . 25
5.4.2 F-TEIDu allocation / release in the CP function . 25
5.4.3 F-TEIDu allocation / release in the UP function . 25
5.5 UE IP address management (allocation, renewal and release) . 26
5.6 Control of user plane forwarding . 27
5.6.1 General . 27
5.6.2 Control of user plane forwarding . 27
5.6.3 Format of forwarded user plane data . 27
5.7 UE's permanent identifier usage . 28
5.8 Functionality of sending of "end marker" . 28
5.8.1 UP function constructing the "end marker" packets . 28
5.8.2 CP function constructing the "end marker" packets. 28
ETSI
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3GPP TS 23.214 version 15.5.0 Release 15 4 ETSI TS 123 214 V15.5.0 (2019-03)
5.9 Idle state packet SGW buffering function . 28
5.9.1 General . 28
5.9.2 Buffering in CP function . 29
5.9.3 Buffering in UP function . 29
5.9.3.1 General . 29
5.9.3.2 Delay Downlink Packet Notification . 29
5.9.3.3 Extended buffering . 30
5.9.3.4 Throttling . 30
5.10 Bearer and APN policing . 30
5.11 PCC/ADC related functions . 31
5.11.1 Activation/Deactivation of predefined PCC/ADC rules . 31
5.11.2 Enforcement of dynamic PCC/ADC rules . 31
5.11.3 Redirection . 32
5.11.4 Support of SDCI . 32
5.12 User Plane function selection . 32
5.12.1 General . 32
5.12.2 Selection of PGW-U . 33
5.12.3 Selection of SGW-U . 33
5.12.4 Selection of a combined SGW/PGW-U . 34
5.12.5 Selection of TDF-U . 34
5.12.5.1 Solicited application reporting mode . 34
5.12.5.2 Unsolicited application reporting mode . 34
6 Information flows . 34
6.1 General . 34
6.2 Sx Session Management Procedures . 35
6.2.1 General . 35
6.2.2 Sx Session Establishment Procedure . 35
6.2.3 Sx Session Modification Procedure . 36
6.2.4 Sx Session Termination Procedure . 36
6.3 Updates to procedures in other specifications . 37
6.3.1 Updates to procedures specified in TS 23.401 [2] . 37
6.3.1.2 Procedures with SGW change . 40
6.3.1.2.1 General . 40
6.3.1.2.2 Type 1 . 40
6.3.1.2.3 Type 2 . 42
6.3.1.3 Procedures with eNB F-TEIDu update . 44
6.3.1.4 Procedures with release of eNB F-TEIDu . 45
6.3.1.5 Procedures when downlink data is buffered in the UP function . 46
6.3.1.6 Procedures with release of PDN connection . 47
6.3.1.7 Procedures with modification of bearer . 49
6.3.2 Updates to procedures specified in TS 23.203 [3] . 51
6.3.2.1 IP-CAN session establishment . 51
6.3.2.2 IP-CAN session termination. 52
6.3.2.3 IP-CAN session modification. 52
6.3.2.4 Management of PFDs . 53
6.3.3 Updates to procedures specified in TS 23.402 [4] . 54
6.3.3.1 Procedures with GTP based S2b establishment . 54
6.3.3.2 Procedures with GTP based S2a establishment. 55
6.3.3.3 Procedures with GTP based S2b release . 56
6.3.3.4 Procedures with GTP based S2a release . 56
6.3.3.5 Procedures with dedicated bearer activation by PGW . 57
6.3.3.6 Procedures with bearer deactivation by PGW . 58
6.3.3.7 Procedures with bearer modification . 58
6.3.3.8 Procedures with handover from non-3GPP access . 59
6.3.3.9 Procedures with handover from 3GPP access . 61
6.3.4 Updates to procedures specified in TS 23.060 [5] . 62
6.3.4.1 Procedures with PDN connection deactivation . 62
6.3.4.1.1 Procedures with SGSN terminating S4 interface . 62
6.3.4.1.2 Procedures with SGSN terminating Gn/Gp interface . 65
6.3.4.2 Procedures with PDN connection modification . 67
6.3.4.2.1 Procedures with SGSN terminating S4 interface . 67
ETSI
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3GPP TS 23.214 version 15.5.0 Release 15 5 ETSI TS 123 214 V15.5.0 (2019-03)
6.3.4.2.2 Procedures with SGSN terminating Gn/Gp interface . 75
6.3.4.3 Procedures with PDN connection establishment . 78
6.4 Sx Reporting Procedures . 80
6.4.1 General . 80
6.4.2 Sx Session Level Reporting Procedure . 80
6.5 Sx Management Procedures . 81
6.5.1 General . 81
6.5.2 Sx PFD management Procedure . 81
6.5.3 Sx Association Setup Procedure . 81
6.5.4 Sx Association Update Procedure . 82
6.5.5 Sx Association Release Procedure . 82
7 Parameters . 82
7.1 Parameters for Sx session management . 82
7.2 Session context . 82
7.3 Packet Detection Rule . 83
7.4 Usage Reporting Rule . 86
7.5 Forwarding Action Rule . 87
7.6 QoS Enforcement Rule . 88
7.7 Usage Report generated by UP function . 89
7.8 Functional description . 90
7.8.1 General . 90
7.8.2 PDN connection and TDF session level context . 91
7.8.3 Bearer related context . 91
7.8.4 Measurement key related context . 91
7.9 Parameters for Sx management . 92
7.9.1 Parameters for PFD management . 92
Annex A (informative): Change history . 93
History . 94
ETSI
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3GPP TS 23.214 version 15.5.0 Release 15 6 ETSI TS 123 214 V15.5.0 (2019-03)
Foreword
This Technical Specification has been produced by the 3rd Generation Partnership Project (3GPP).
The contents of the present document are subject to continuing work within the TSG and may change following formal
TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an
identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater indicates TSG approved document under change control.
y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
updates, etc.
z the third digit is incremented when editorial only changes have been incorporated in the document.
ETSI
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3GPP TS 23.214 version 15.5.0 Release 15 7 ETSI TS 123 214 V15.5.0 (2019-03)
1 Scope
The present document specifies the overall stage 2 level functionality for control and user plane separation of EPC's
SGW, PGW and TDF. This enables a flexible placement of the separated control plane and user plane functions for
supporting diverse deployment scenarios (e.g. central or distributed user plane function) without affecting the overall
functionality provided by these EPC entities.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or
non-specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including
a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same
Release as the present document.
[1] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".
[2] 3GPP TS 23.401: "General Packet Radio Service (GPRS) enhancements for Evolved Universal
Terrestrial Radio Access Network (E-UTRAN) access".
[3] 3GPP TS 23.203: "Policy and charging control architecture".
...