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Content for  TS 24.539  Word version:  17.1.0

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1  ScopeWord‑p. 8

The present document specifies the protocols of communication between:
  1. a DS-TT and a TSN AF;
  2. a NW-TT and a TSN AF;
  3. a DS-TT and an NEF; and
  4. a NW-TT and an NEF;
as specified in TS 23.501 for:
  1. port management regarding Ethernet ports or PTP ports; and
  2. user plane node management.

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]
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]
TS 24.007: "Mobile radio interface signalling layer 3; General aspects".
[5]
TS 24.501: "Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3".
[5A]
TS 29.244: "Interface between the Control Plane and the User Plane nodes".
[5B]
TS 29.512: "5G System; Session Management Policy Control Service; Stage 3".
[6]
IEEE Std 802.1AB-2016: "IEEE Standard for Local and metropolitan area networks -- Station and Media Access Control Connectivity Discovery".
[7]
IEEE Std 802.1Q-2018: "Standard for Local and metropolitan area networks--Bridges and Bridged Networks".
[8]  Void
[9]
IEEE Std 802.1Qcc-2018: "Standard for Local and metropolitan area networks - Bridges and Bridged Networks - Amendment: Stream Reservation Protocol (SRP) Enhancements and Performance Improvements".
[10]
IEEE Std 802.1CB-2017: "IEEE Standard for Local and metropolitan area networks-Frame Replication and Elimination for Reliability".
[11]
IEEE Std 1588-2019: "IEEE Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems".
[12]
IEEE Std 802.1AS-2020: "IEEE Standard for Local and metropolitan area networks--Timing and Synchronization for Time-Sensitive Applications".
[13]
ST 2059-22015! - SMPTE Standard - "SMPTE Profile for Use of IEEE-1588 Precision Time Protocol in Professional Broadcast Applications".
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3  Definitions of terms, symbols and abbreviationsWord‑p. 9

3.1  Terms

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.
For the purposes of the present document, the following terms and definitions given in TS 23.501 apply:
5G System
Time Sensitive Communication
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3.2  Abbreviations

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
AF
Application function
UMS
User plane node Management Service
CNC
Centralized Network Configuration
DS-TT
Device-Side TSN Translator
PMS
Port management service
NW-TT
Network-Side TSN Translator
TSC
Time Sensitive Communication
TSN
Time-Sensitive Networking
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4  General

For time sensitive communication (TSC), a 5G system (5GS) can act as a user plane node of an external network or a 5GS can be independently used to enable TSC.
The device-side TSN translator (DS-TT) is deployed at the UE-side edge and the network-side TSN translator (NW-TT) is deployed at the network-side edge (see TS 23.501).
When integrated with IEEE TSN network, the TSN application function (TSN AF) is deployed to exchange user plane node information (i.e. TSN bridge information) with the centralized network configuration (CNC) as defined in IEEE Std 802.1Qcc-2018 [9]. The user plane node information includes port management information and user plane node management information. Port management information is related to ports located in the DS-TT and NW-TT. User plane node management information is related to the NW-TT.
In order to support user plane node information exchange between TSN AF and CNC, the DS-TT, NW-TT, and TSN AF support procedures for port management and user plane node management. Clause 5 describes details of the elementary procedures between TSN AF and DS-TT for port management. Clause 6 describes details of the elementary procedures between TSN AF and NW-TT for port management (clause 6.2) and user plane node management (clause 6.3).
A 5GS supports AF-requested time synchronization services. For this purpose, an NEF in the 5GS exposes 5GS capabilities to support the services as described in TS 23.501, which requires for the NEF to manage the user plane node and ports (either Ethernet ports or PTP ports) in the DS-TT and NW-TT for time synchronization. Therefore, the DS-TT, NW-TT, and NEF support procedures for port management and user plane node management. Clause 5 describes details of the elementary procedures between NEF and DS-TT for port management for time synchronization. Clause 6 describes details of the elementary procedures between NEF and NW-TT for port management (clause 6.2) and user plane node management (clause 6.3) for time synchronization.
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