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Content for  TS 24.535  Word version:  17.2.0

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1  Scopep. 6

The present document specifies the protocols of communication between a DS-TT and a NW-TT as specified in TS 23.501 for:
  1. gPTP message delivery.

2  Referencesp. 6

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]
IEEE Std 1588-2019: "IEEE Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems".
[4]
IEEE Std 802.1AS-2020: "IEEE Standard for Local and metropolitan area networks--Timing and Synchronization for Time-Sensitive Applications".
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3  Definitions of terms, symbols and abbreviationsp. 6

3.1  Termsp. 6

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.
example:
text used to clarify abstract rules by applying them literally.
For the purposes of the present document, the following terms and definitions given in TS 23.501 apply:
5G System
Time Sensitive Communication
TSN working domain
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3.2  Abbreviationsp. 6

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
DS-TT
Device-Side TSN Translator
gPTP
Generalized Precision Time Protocol
NW-TT
Network-Side TSN Translator
OUI
Organizational Unique Identifier
PTP
Precision Time Protocol
TSC
Time Sensitive Communication
TSN
Time Sensitive Networking
TT
TSN Translator
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4  Generalp. 7

For time synchronization and time sensitive communication (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).
The DS-TT and NW-TT fulfil all functions related to IEEE Std 802.1AS [4] or IEEE Std 1588-2019 [3], which include delivery of (g)PTP messages. Clause 5 describes details of the (g)PTP message delivery.
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