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TS 24.193
5G System – Access Traffic Steering, Switching and Splitting (ATSSS)

3GPP‑Page   ETSI‑search   fToC↓   Partial Content →
V19.4.0 (PDF)  2025/09  … p.
V18.9.0  2025/06  104 p.
V17.11.0  2025/06  84 p.
V16.4.0  2021/06  55 p.
Rapporteur:
Miss Zhou, Xingyue
ZTE Corporation

full Table of Contents for  TS 24.193  Word version:  19.4.0

each clause number in 'red' refers to the equivalent title in the Partial Content
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1Scope  p. 9
2References  p. 9
3Definitions, symbols and abbreviations  p. 10
3.1Definitions  p. 10
3.2Abbreviations  p. 10
4General description  p. 11
4.1Introduction  p. 11
4.2Multi-access PDU session  p. 11
4.3Steering functionalities  p. 12
4.4Support of access performance measurements  p. 12
4.5Distribution of traffic across 3GPP access and non-3GPP access networks  p. 13
4.6EPS interworking  p. 13
4.7MA PDU session establishment with 3GPP access connected to EPC and non-3GPP access connected to 5GCN  p. 15
4.8MA PDU session establishment with untrusted non-3GPP access connected to EPC and 3GPP access connected to 5GCN |R18|  p. 16
5ATSSS control procedures  p. 16
5.1Introduction  p. 16
5.2Multi-access PDU connectivity service  p. 17
5.2.1Activation of multi-access PDU connectivity service  p. 17
5.2.2Re-activation of user-plane resources  p. 17
5.2.3Release of user-plane resources  p. 18
5.2.4Updating ATSSS parameters  p. 19
5.2.5Converting PDU session transferred from EPS to MA PDU session  p. 19
5.2.6PDU session establishment with network modification to MA PDU session  p. 20
5.2.7Transferring user-plane resources of MA PDU session using non-3GPP access path switching |R19|  p. 21
5.3Multi-access PDU connectivity over E-UTRAN connected to EPC and non-3GPP access network connected to 5GCN  p. 21
5.3.0General |R17|  p. 21
5.3.1UE establishing a PDN connection over E-UTRAN connected to EPC as a user-plane resource of an MA PDU session to be established  p. 21
5.3.2UE establishing a PDN connection over E-UTRAN connected to EPC as a user-plane resource of an already established MA PDU session  p. 24
5.3.3Re-activation of user-plane resources |R17|  p. 24
5.3.4Release of user-plane resource(s) |R17|  p. 24
5.3.5Updating ATSSS parameters |R17|  p. 25
5.3.6A/Gb mode or Iu mode Interworking |R17|  p. 25
5.3.7Abnormal cases in the UE |R17|  p. 26
5.3aMulti-access PDU connectivity over untrusted non-3GPP access network connected to EPC and 3GPP access connected to 5GCN |R18|  p. 26
5.3a.1General  p. 26
5.3a.2UE establishing a PDN connection over untrusted non-3GPP access network connected to EPC as a user-plane resource of an MA PDU session to be established  p. 27
5.3a.3UE establishing a PDN connection over untrusted non-3GPP access network connected to EPC as a user-plane resource of an already established MA PDU session  p. 28
5.3a.4Release of user-plane resource(s)  p. 28
5.3a.5Updating ATSSS parameters  p. 29
5.3bHandling of multi-access PDU connectivity service failure |R19|  p. 29
5.3b.1General  p. 29
5.3b.2Incompatible steering functionality between the UE and the network  p. 29
5.3b.2.1Network procedures  p. 29
5.3b.2.2UE procedures  p. 30
5.4Performance measurement function (PMF) protocol (PMFP) procedures  p. 30
5.4.1General  p. 30
5.4.2Elementary procedures for PMFP  p. 32
5.4.2.1PMFP message transport  p. 32
5.4.2.1.1PMFP message transport in IPv4, IPv6 or IPv4v6 PDU session  p. 32
5.4.2.1.2PMFP message transport in Ethernet PDU session  p. 35
5.4.2.1.3PMFP message transport associated with QoS flow |R17|  p. 37
5.4.2.2Extended procedure transaction identity (EPTI)  p. 37
5.4.3UE-initiated RTT measurement procedure  p. 37
5.4.3.1General  p. 37
5.4.3.2UE-initiated RTT measurement procedure initiation  p. 37
5.4.3.3UE-initiated RTT measurement procedure completion  p. 38
5.4.3.4Abnormal cases in the UE  p. 38
5.4.4Network-initiated RTT measurement procedure  p. 38
5.4.4.1General  p. 38
5.4.4.2UPF-initiated RTT measurement procedure initiation  p. 39
5.4.4.3UPF-initiated RTT measurement procedure completion  p. 39
5.4.4.4Abnormal cases in the network  p. 40
5.4.5Access availability or unavailability report procedure  p. 40
5.4.5.1General  p. 40
5.4.5.2Access availability or unavailability report procedure initiation  p. 40
5.4.5.3Access availability or unavailability report procedure completion  p. 40
5.4.5.4Abnormal cases in the UE  p. 40
5.4.6UE-initiated PLR measurement procedure |R17|  p. 41
5.4.6.1General  p. 41
5.4.6.2UE-initiated PLR count procedure  p. 43
5.4.6.2.1UE-initiated PLR count procedure initiation  p. 43
5.4.6.2.2UE-initiated PLR count procedure completion  p. 43
5.4.6.2.3Abnormal cases in the UE  p. 44
5.4.6.3UE-initiated PLR report procedure  p. 44
5.4.6.3.1UE-initiated PLR report procedure initiation  p. 44
5.4.6.3.2UE-initiated PLR report procedure completion  p. 45
5.4.6.3.3Abnormal cases in the UE  p. 45
5.4.7Network-initiated PLR measurement procedure |R17|  p. 45
5.4.7.1General  p. 45
5.4.7.2Network-initiated PLR count procedure  p. 47
5.4.7.2.1Network-initiated PLR count procedure initiation  p. 47
5.4.7.2.2Network-initiated PLR count procedure completion  p. 48
5.4.7.2.3Abnormal cases in the UPF  p. 48
5.4.7.3Network-initiated PLR report procedure  p. 49
5.4.7.3.1Network-initiated PLR report procedure initiation  p. 49
5.4.7.3.2Network-initiated PLR report procedure completion  p. 49
5.4.7.3.3Abnormal cases in the UPF  p. 50
5.4.8UE assistance data provisioning procedure |R17|  p. 50
5.4.8.1General  p. 50
5.4.8.2UE assistance data provisioning procedure initiation  p. 50
5.4.8.3UE assistance data received by the network  p. 51
5.4.8.4Abnormal cases in the UE  p. 51
5.4.9UE assistance data termination procedure |R17|  p. 51
5.4.9.1General  p. 51
5.4.9.2UE assistance data termination procedure initiation  p. 51
5.4.9.3UE assistance data termination received by the network  p. 52
5.4.9.4Abnormal cases in the UE  p. 52
5.4.10Traffic duplication suspend procedure |R18|  p. 52
5.4.10.1General  p. 52
5.4.10.2Traffic duplication suspend procedure initiation  p. 52
5.4.10.3Traffic duplication suspend procedure completion  p. 53
5.4.10.4Abnormal cases in the network  p. 53
5.4.11Traffic duplication resume procedure |R18|  p. 53
5.4.11.1General  p. 53
5.4.11.2Traffic duplication resume procedure initiation  p. 54
5.4.11.3Traffic duplication resume procedure completion  p. 54
5.4.11.4Abnormal cases in the network  p. 54
6PDUs and parameters specific to the present document  p. 55
6.1ATSSS parameters  p. 55
6.1.1General  p. 55
6.1.2Encoding of ATSSS parameters  p. 55
6.1.3ATSSS rules  p. 56
6.1.3.1Definition of ATSSS rules  p. 56
6.1.3.2Encoding of ATSSS rules  p. 59
6.1.4Network steering functionalities information  p. 65
6.1.4.1Definition of network steering functionalities information  p. 65
6.1.4.1.0General |R18|  p. 65
6.1.4.1.1Steering information for different steering functionalities  p. 66
6.1.4.1.2Void  p. …
6.1.4.1.3Void  p. …
6.1.4.1.4Void  p. …
6.1.4.1.5Void  p. …
6.1.4.1.6Void  p. …
6.1.4.1.7Void  p. …
6.1.4.2Encoding of network steering functionalities information  p. 67
6.1.5Measurement assistance information  p. 71
6.1.5.1Definition of measurement assistance information  p. 71
6.1.5.2Encoding of measurement assistance information  p. 71
6.1.5AATSSS status |R19|  p. 75
6.1.5A.1Definition of ATSSS status  p. 75
6.1.5A.2Encoding of ATSSS status  p. 75
6.1.6ATSSS PCO parameters  p. 76
6.1.6.1General  p. 76
6.1.6.2ATSSS request PCO parameter  p. 76
6.1.6.3ATSSS response with the length of two octets PCO parameter  p. 79
6.2Encoding of performance measurement function (PMF) protocol (PMFP)  p. 81
6.2.1Message functional definitions and format  p. 81
6.2.1.1General  p. 81
6.2.1.2PMFP echo request  p. 81
6.2.1.2.1Message definition  p. 81
6.2.1.3PMFP echo response  p. 82
6.2.1.3.1Message definition  p. 82
6.2.1.4PMFP access report  p. 82
6.2.1.4.1Message definition  p. 82
6.2.1.5PMFP acknowledgement  p. 83
6.2.1.5.1Message definition  p. 83
6.2.1.6PMFP UAD provisioning |R17|  p. 83
6.2.1.6.1Message definition  p. 83
6.2.1.7PMFP PLR count request |R17|  p. 84
6.2.1.7.1Message definition  p. 84
6.2.1.8PMFP PLR count response |R17|  p. 84
6.2.1.8.1Message definition  p. 84
6.2.1.9PMFP PLR report request |R17|  p. 84
6.2.1.9.1Message definition  p. 84
6.2.1.9.2Additional measurement indication  p. 85
6.2.1.10PMFP PLR report response |R17|  p. 85
6.2.1.10.1Message definition  p. 85
6.2.1.10.2Additional measurement indication  p. 85
6.2.1.11PMFP UAT command |R17|  p. 85
6.2.1.11.1Message definition  p. 85
6.2.1.12PMFP UAT complete |R17|  p. 86
6.2.1.12.1Message definition  p. 86
6.2.1.13PMFP UAD provisioning complete |R17|  p. 86
6.2.1.13.1Message definition  p. 86
6.2.1.14PMFP TDS request |R18|  p. 87
6.2.1.14.1Message definition  p. 87
6.2.1.15PMFP TDS response |R18|  p. 87
6.2.1.15.1Message definition  p. 87
6.2.1.16PMFP TDR request |R18|  p. 87
6.2.1.16.1Message definition  p. 87
6.2.1.17PMFP TDR response |R18|  p. 88
6.2.1.17.1Message definition  p. 88
6.2.2Encoding of information element  p. 88
6.2.2.1Message type  p. 88
6.2.2.2Extended procedure transaction identity  p. 89
6.2.2.3Access availability state  p. 89
6.2.2.4Spare half octet  p. 90
6.2.2.5Request identity  p. 90
6.2.2.6Padding  p. 90
6.2.2.7Void  p. …
6.2.2.8DL distribution information |R17|  p. 91
6.2.2.9Additional measurement indication |R17|  p. 91
6.2.2.10Counting result |R17|  p. 92
6.2.2.11Traffic type |R18|  p. 92
6.3Encoding of 3GPP IEEE MAC based protocol family  p. 92
6.4Transport modes for MPQUIC-based functionalities |R18|  p. 93
6.4.1General  p. 93
6.4.2Datagram mode 1  p. 93
6.4.3Datagram mode 2  p. 94
6.4.4Stream mode  p. 94
7List of system parameters  p. 95
7.1General  p. 95
7.2Timers of performance measurement function (PMF) protocol (PMFP)  p. 95
8Handling of unknown, unforeseen, and erroneous PMFP data  p. 96
8.1General  p. 96
8.2Message too short or too long  p. 97
8.2.1Message too short  p. 97
8.2.2Message too long  p. 97
8.3Unknown or unforeseen extended procedure transaction identity (EPTI)  p. 97
8.3.1Extended procedure transaction identity (EPTI)  p. 97
8.4Unknown or unforeseen message type  p. 97
8.5Non-semantical mandatory information element errors  p. 97
8.5.1Common procedures  p. 97
8.6Unknown and unforeseen IEs in the non-imperative message part  p. 98
8.6.1IEIs unknown in the message  p. 98
8.6.2Out of sequence IEs  p. 98
8.6.3Repeated IEs  p. 98
8.7Non-imperative message part errors  p. 98
8.7.1General  p. 98
8.7.2Syntactically incorrect optional IEs  p. 98
8.7.3Conditional IE errors  p. 98
8.8Messages with semantically incorrect contents  p. 99
ARegistration templates  p. 100
A.1IEEE registration templates  p. 100
A.1.1IEEE registration templates for ethertype values  p. 100
A.1.1.1IEEE registration templates for ethertype value for 3GPP IEEE MAC based protocol family  p. 100
$Change history  p. 103

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