ETSI TS 124 193 V16.2.0 (2021-01)

5G; 5G System;Access Traffic Steering, Switching and Splitting (ATSSS); Stage 3 (3GPP TS 24.193 version 16.2.0 Release 16)

RTS/TSGC-0124193vg20

General Information

• Status: Not Published
• Technical Committee: 3GPP CT 1 - MM/CC/SM [lu] (formely CN1)
• Current Stage: 12 - Completion
• Completion Date: 14-Jan-2021

Standards Content (Sample)

ETSI TS 124 193 V16.2.0 (2021-01)






TECHNICAL SPECIFICATION
5G;
5G System;
Access Traffic Steering, Switching and Splitting (ATSSS);
Stage 3
(3GPP TS 24.193 version 16.2.0 Release 16)

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3GPP TS 24.193 version 16.2.0 Release 16 1 ETSI TS 124 193 V16.2.0 (2021-01)



Reference
RTS/TSGC-0124193vg20
Keywords
5G
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3GPP TS 24.193 version 16.2.0 Release 16 2 ETSI TS 124 193 V16.2.0 (2021-01)
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
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
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right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Legal Notice
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. These shall be
interpreted as being references to the corresponding ETSI deliverables.
The cross reference between 3GPP and ETSI identities can be found under http://webapp.etsi.org/key/queryform.asp.
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 24.193 version 16.2.0 Release 16 3 ETSI TS 124 193 V16.2.0 (2021-01)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 6
1 Scope . 8
2 References . 8
3 Definitions, symbols and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 9
4 General description. 9
4.1 Introduction . 9
4.2 Multi-access PDU session . 9
4.3 Steering functionalities . 10
4.4 Support of access performance measurements . 10
4.5 Distribution of traffic across 3GPP access and non-3GPP access networks . 11
4.6 EPS interworking . 11
4.7 MA PDU session when 5G-RG is connected to EPS . 12
5 ATSSS control procedures . 12
5.1 Introduction . 12
5.2 Multi-access PDU connectivity service . 13
5.2.1 Activation of multi-access PDU connectivity service . 13
5.2.2 Re-activation of user-plane resources . 14
5.2.3 Release of user-plane resources . 14
5.2.4 Updating ATSSS parameters . 15
5.2.5 Converting PDU session transferred from EPS to MA PDU session . 15
5.2.6 PDU session establishment with network modification to MA PDU session . 16
5.3 Hybrid access with multi-access PDU connectivity over E-UTRAN and wireline access network . 17
5.3.1 5G-RG establishing a PDN connection as a user-plane resource of an MA PDU session to be
established. 17
5.3.2 5G-RG establishing a PDN connection as a user-plane resource of an already established MA PDU
session . 18
5.4 Performance measurement function (PMF) protocol (PMFP) procedures . 19
5.4.1 General . 19
5.4.2 Elementary procedures for PMFP . 19
5.4.2.1 PMFP message transport . 19
5.4.2.1.1 PMFP message transport in IPv4, IPv6 or IPv4v6 PDU session . 19
5.4.2.1.2 PMFP message transport in Ethernet PDU session . 21
5.4.2.2 Extended procedure transaction identity (EPTI) . 22
5.4.3 UE-initiated RTT measurement procedure . 23
5.4.3.1 General . 23
5.4.3.2 UE-initiated RTT measurement procedure initiation . 23
5.4.3.3 UE-initiated RTT measurement procedure completion. 23
5.4.3.4 Abnormal cases in the UE . 24
5.4.4 Network-initiated RTT measurement procedure . 24
5.4.4.1 General . 24
5.4.4.2 UPF-initiated RTT measurement procedure initiation . 24
5.4.4.3 UPF-initiated RTT measurement procedure completion. 25
5.4.4.4 Abnormal cases in the network . 25
5.4.5 Access availability or unavailability report procedure . 25
5.4.5.1 General . 25
5.4.5.2 Access availability or unavailability report procedure initiation . 25
5.4.5.3 Access availability or unavailability report procedure completion . 26
5.4.5.4 Abnormal cases in the UE . 26
ETSI

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3GPP TS 24.193 version 16.2.0 Release 16 4 ETSI TS 124 193 V16.2.0 (2021-01)
6 PDUs and parameters specific to the present document . 26
6.1 ATSSS parameters . 26
6.1.1 General . 26
6.1.2 Encoding of ATSSS parameters . 27
6.1.3 ATSSS rules. 27
6.1.3.1 Definition of ATSSS rules . 27
6.1.3.2 Encoding of ATSSS rules . 28
6.1.4 Network steering functionalities information . 31
6.1.4.1 Definition of network steering functionalities information . 31
6.1.4.1.1 MPTCP Functionality with any steering mode and the ATSSS-LL functionality with only the
active-standby steering mode . 31
6.1.4.1.2 ATSSS-LL Functionality with any steering mode . 32
6.1.4.1.3 MPTCP functionality with any steering mode and the ATSSS-LL functionality with any
steering mode . 32
6.1.4.2 Encoding of network steering functionalities information . 33
6.1.5 Measurement assistance information . 36
6.1.5.1 Definition of measurement assistance information . 36
6.1.5.2 Encoding of measurement assistance information . 36
6.1.6 ATSSS PCO parameters . 38
6.1.6.1 General . 38
6.1.6.2 ATSSS request PCO parameter. 38
6.1.6.3 ATSSS response with the length of two octets PCO parameter . 38
6.2 Encoding of performance measurement function (PMF) protocol (PMFP) . 40
6.2.1 Message functional definitions and format . 40
6.2.1.1 General . 40
6.2.1.2 PMFP echo request . 40
6.2.1.2.1 Message definition . 40
6.2.1.3 PMFP echo response . 40
6.2.1.3.1 Message definition . 40
6.2.1.4 PMFP access report . 41
6.2.1.4.1 Message definition . 41
6.2.1.5 PMFP acknowledgement . 41
6.2.1.5.1 Message definition . 41
6.2.2 Encoding of information element . 42
6.2.2.1 Message type . 42
6.2.2.2 Extended procedure transaction identity . 42
6.2.2.3 Access availability state . 42
6.2.2.4 Spare half octet . 43
6.2.2.5 Request identity . 43
6.2.2.6 Padding . 43
6.3 Encoding of 3GPP IEEE MAC based protocol family . 44
7 List of system parameters . 44
7.1 General . 44
7.2 Timers of performance measurement function (PMF) protocol (PMFP) . 44
8 Handling of unknown, unforeseen, and erroneous PMFP data . 45
8.1 General . 45
8.2 Message too short or too long . 46
8.2.1 Message too short . 46
8.2.2 Message too long . 46
8.3 Unknown or unforeseen extended procedure transaction identity (EPTI) . 46
8.3.1 Extended procedure transaction identity (EPTI) . 46
8.4 Unknown or unforeseen message type . 46
8.5 Non-semantical mandatory information element errors . 46
8.5.1 Common procedures . 46
8.6 Unknown and unforeseen IEs in the non-imperative message part . 47
8.6.1 IEIs unknown in the message . 47
8.6.2 Out of sequence IEs . 47
8.6.3 Repeated IEs . 47
8.7 Non-imperative message part errors . 47
8.7.1 General . 47
ETSI

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3GPP TS 24.193 version 16.2.0 Release 16 5 ETSI TS 124 193 V16.2.0 (2021-01)
8.7.2 Syntactically incorrect optional IEs . 47
8.7.3 Conditional IE errors . 47
8.8 Messages with semantically incorrect contents . 48
Annex A (informative): Registration templates . 49
A.1 IEEE registration templates . 49
A.1.1 IEEE registration templates for ethertype values . 49
A.1.1.1 IEEE registration templates for ethertype value for 3GPP IEEE MAC based protocol family . 49
Annex B (informative): Change history . 52
History . 53

ETSI

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3GPP TS 24.193 version 16.2.0 Release 16 6 ETSI TS 124 193 V16.2.0 (2021-01)
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.
In the present document, certain modal verbs have the following meanings:
shall indicates a mandatory requirement to do something
shall not indicates an interdiction (prohibition) to do something
NOTE 1: The constructions "shall" and "shall not" are confined to the context of normative provisions, and do not
appear in Technical Reports.
NOTE 2: The constructions "must" and "must not" are not used as substitutes for "shall" and "shall not". Their use
is avoided insofar as possible, and they are not used in a normative context except in a direct citation from
an external, referenced, non-3GPP document, or so as to maintain continuity of style when extending or
modifying the provisions of such a referenced document.
should indicates a recommendation to do something
should not indicates a recommendation not to do something
may indicates permission to do something
need not indicates permission not to do something
NOTE 3: The construction "may not" is ambiguous and is not used in normative elements. The unambiguous
constructions "might not" or "shall not" are used instead, depending upon the meaning intended.
can indicates that something is possible
cannot indicates that something is impossible
NOTE 4: The constructions "can" and "cannot" shall not to be used as substitutes for "may" and "need not".
will indicates that something is certain or expected to happen as a result of action taken by an agency
the behaviour of which is outside the scope of the present document
will not indicates that something is certain or expected not to happen as a result of action taken by an
agency the behaviour of which is outside the scope of the present document
might indicates a likelihood that something will happen as a result of action taken by some agency the
behaviour of which is outside the scope of the present document
ETSI

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3GPP TS 24.193 version 16.2.0 Release 16 7 ETSI TS 124 193 V16.2.0 (2021-01)
might not indicates a likelihood that something will not happen as a result of action taken by some agency
the behaviour of which is outside the scope of the present document
In addition:
is (or any other verb in the indicative mood) indicates a statement of fact
is not (or any other negative verb in the indicative mood) indicates a statement of fact
NOTE 5: The constructions "is" and "is not" do not indicate requirements.
ETSI

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3GPP TS 24.193 version 16.2.0 Release 16 8 ETSI TS 124 193 V16.2.0 (2021-01)
1 Scope
The present document specifies the procedures for access traffic steering, switching and splitting (ATSSS) between the
UE and the network across one 3GPP access network and one non-3GPP access network as specified in
3GPP TS 23.501 [2], 3GPP 23.502 [3], and 3GPP TS 23.316 [4].
The ATSSS can be supported over the access network where an MA PDU session can be established. The type of
access network includes NG-RAN and untrusted non-3GPP access network as specified in 3GPP TS 23.501 [2], trusted
non-3GPP access network, wireline access network and as specified in 3GPP TS 23.316 [4]. An MA PDU session
established by the 5G-RG can also simultaneously use one 3GPP access network connected to EPC and one wireline
access network connected to 5GCN as specified in 3GPP TS 23.316 [4].
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 23.501: "System Architecture for the 5G System; Stage 2".
[3] 3GPP TS 23.502: "Procedures for the 5G System; Stage 2".
[4] 3GPP TS 23.316: "Wireless and wireline convergence access support for the 5G System (5GS)".
[5] 3GPP TS 24.526: "UE policies for 5G System (5GS); Stage 3".
[6] 3GPP TS 24.501: "Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3".
[7] 3GPP TS 24.502: "Access to the 3GPP 5G System (5GS) via non-3GPP access
networks; Stage 3".
[8] IETF RFC 8684: "TCP Extensions for Multipath Operation with Multiple Addresses".
[9] IETF RFC 8803: "0-RTT TCP Convert Protocol".
[10] 3GPP TS 24.301: "Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS);
Stage 3".
[11] IEEE Std 802-2014: "IEEE Standard for Local and Metropolitan Area Networks: Overview and
Architecture".
[12] IEEE 802.3-2018: "IEEE Standard for Ethernet".
[13] 3GPP TS 24.007: "Mobile radio interface signalling layer 3; General aspects".
[14] 3GPP TS 33.501: "Security architecture and procedures for 5G system".
ETSI

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3GPP TS 24.193 version 16.2.0 Release 16 9 ETSI TS 124 193 V16.2.0 (2021-01)
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in 3GPP TR 21.905 [1] and the following
apply. A term defined in the present document takes precedence over the definition of the same term, if
...