Content for TS 29.585 Word version: 18.0.0
1 Scope
2 References
3 Definitions of terms, symbols and abbreviations
3.1 Terms
3.2 Symbols
3.3 Abbreviations
4 General
4.1 Introduction
...
...
1 Scope p. 7
The present document specifies the protocol of communication in the 5G System between:
- the SMF/CUC and the (R)AN/AN-TL, and
- the SMF/CUC and the UPF/CN-TL,
2 References p. 7
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]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
TS 23.501: "System Architecture for the 5G System; Stage 2".
[3]
TS 23.502: "Procedures for the 5G System; Stage 2".
[4]
IEEE Std 802.1Q-2022: "IEEE Standard for Local and Metropolitan Area Networks-Bridges and Bridged Networks".
[5]
TS 38.413: "NG-RAN; NG Application Protocol (NGAP)".
[6]
TS 29.244: "Interface between the Control Plane and the User Plane nodes".
[7]
IEEE Std 802.1CBdb-2021: "IEEE Standard for Local and metropolitan area networks-Frame Replication and Elimination for Reliability".
[8]
RFC 2474: "Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers".
[9]
IEEE P802.1Qdj-d1.3: "IEEE Draft Standard for Local and metropolitan area networks - Bridges and Bridged Networks - Amendment XX: Configuration Enhancements for Time-Sensitive Networking".
3 Definitions of terms, symbols and abbreviations p. 7
3.1 Terms p. 7
For the purposes of the present document, the terms given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.
Stream:
A unidirectional flow of time-sensitive data from one source to one or more destinations, and at the highest level, one Talker end system to one or more Listener end systems.
For the purposes of the present document, the following terms and definitions given in TS 23.501 apply:
5G System
3.2 Symbols p. 8
No symbol is defined in this release of the specification.
3.3 Abbreviations p. 8
For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.
5GS
5G System
AN-TL
Access Network Talker Listener function
CN-TL
Core Network Talker Listener function
CNC
Centralized Network Configuration
CUC
Centralized User Configuration
ES
End Station
(R)AN
(Radio) Access Network
SMF
Session Management Function
TL
Talker Listener
TN
Transport Network
TSN
Time-Sensitive Networking
UPF
User Plane Function
4 General p. 8
4.1 Introduction p. 8
The 5GS supports interworking with IEEE 802.1 TSN deployed in the transport network. The interworking is applicable when the transport network deploys the fully centralized configuration model as defined in IEEE Std 802.1Q [4]. In this scenario, a TSN TN is deployed to realize the N3 interface between the (R)AN and the UPF. From the perspective of the TSN enabled TN, the (R)AN and the UPF act as End Stations (ES) of the TSN TN.
Figure 4.1-1 depicts the reference model for 5GS interworking with TSN enabled TN, with focus on the interfaces between the SMF/CUC and the (R)AN/AN-TL and between the SMF/CUC and the UPF/CN-TL which are in scope of this specification.
Figure 4.1-1: Reference Model - 5GS interworking with TSN enabled TN
(⇒ copy of original 3GPP image)
(⇒ copy of original 3GPP image)
If the (R)AN and the UPF support the TSN Talker and Listener (TL) functionality (i.e. they implement the AN-TL and CN-TL, respectively), the SMF/CUC can communicate with the AN-TL and CN-TL to:
- retrieve the ES capabilities (list of interfaces and interface capabilities) of the AN-TL and CN-TL; and
- configure TSN features in the ES (e.g. for stream identification, stream association with TSN resources, stream transformation, hold and buffer functionality, as described in IEEE Std 802.1Q [4]) of the AN-TL and CN-TL.
