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Content for  TS 22.104  Word version:  17.3.0

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6  Ethernet applications
6.1  Description
This section lists the requirements applicable to the 5G system for supporting cyber-physical applications using Ethernet.
For requirements pertaining to common, fundamental Ethernet transport requirements, and any requirements necessary to support the 5G LAN-type service, see Clause 6.24 in TS 22.261.
6.2  Requirements
For infrastructure dedicated to high performance Ethernet applications, the 3GPP system shall support clock synchronisation defined by IEEE 802.1AS across 5G-based Ethernet links with PDU-session type Ethernet.
For infrastructure dedicated to high performance Ethernet applications, the 3GPP system shall support clock synchronisation defined by IEEE 802.1AS across 5G-based Ethernet links and other ethernet transports such as wired and optical (EPON.)
For infrastructure dedicated to high performance Ethernet applications, the accuracy of clock synchronisation should be better than 1μs.
For infrastructure dedicated to high performance Ethernet applications, the 3GPP system shall support enhancements for time-sensitive networking as defined by IEEE 802.1Q, e.g. time-aware scheduling with absolute cyclic time boundaries defined by IEEE 802.1Qbv [19], for 5G-based Ethernet links with PDU sessions type Ethernet.
For infrastructure dedicated to high performance Ethernet applications, absolute cyclic time boundaries shall be configurable for flows in DL direction and UL direction.
For infrastructure dedicated to high performance Ethernet applications, the 3GPP system shall support coexistence of hard-RT traffic following a time-aware schedule and lower priority traffic. The lower priority traffic cannot have a performance degrading impact on the hard-RT traffic.
The Ethernet transport service shall support routing based on information extracted from the Ethernet header information created based on 802.1Qbv.
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