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full Table of Contents for  TS 23.501  Word version:   16.3.0

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4.4.8  Time Sensitive Communication [R16]Word-p. 68
4.4.8.1  General
The 5G System is extended to support Time sensitive communication as defined in IEEE P802.1Qcc [95]. IEEE TSN is a set of standards to define mechanisms for the time-sensitive (i.e. deterministic) transmission of data over Ethernet networks as in Time-Sensitive Networking (TSN) of the IEEE P802.1Qcc.
4.4.8.2  Architecture to support Time Sensitive Communication
The 5G System is integrated with the external network as a TSN bridge. This "logical" TSN bridge includes TSN Translator functionality for interoperation between TSN System and 5G System both for user plane and control plane. 5GS TSN translator functionality consists of Device-side TSN translator (DS-TT) and Network-side TSN translator (NW-TT). 5G System specific procedures in 5GC and RAN, wireless communication links, etc. remain hidden from the TSN network. To achieve such transparency to the TSN network and the 5GS to appear as any other TSN Bridge, the 5GS provides TSN ingress and egress ports via DS-TT and NW-TT. DS-TT and NW-TT optionally support:
  • hold and forward functionality for the purpose of de-jittering;
  • per-stream filtering and policing as defined in IEEE 802.1Q [98] clause 8.6.5.1.
Reproduction of 3GPP TS 23.501, Figure 4.4.8.2-1: System architecture view with 5GS appearing as TSN bridge
Figure 4.4.8.2-1: System architecture view with 5GS appearing as TSN bridge

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