Page 810 - 5G Basics - Core Network Aspects

2 Transport aspects

Figure 11-1 – OAM protocol reference model of ITU-T G.9701 link

The OAM data between the peer ITU-T G.9701 transceivers at the DPU and the NT is exchanged using the
following OAM channels:
– an embedded operation channel (eoc) between respective TPS-TC entities, specified in
clause 11.2.2;
– a robust management channel (RMC) between respective PMS-TC entities, specified in clause 9.6;
– a special operations channel (SOC) between respective PMD layers during initialization only,
specified in clause 12.2.
The system-related OAM data is transported between peer MEs using special eoc commands that provide a
transparent channel between peer MEs (see clause 11.2.2.4 and Table 11-1). Time-sensitive data is
transported over RMC (e.g., lpr – see Table 9-8).
The eoc and RMC are active only during the showtime and SOC is used to support transceiver initialization
and is deactivated during the showtime. The OAM primitives and parameters exchanges via eoc, RMC and
SOC are defined at the TPS_MGMT, PMS_MGMT and PMD_MGMT, respectively. Relevant OAM primitives
and parameters, both intended for transmission to the peer FTU or received from peer FTU, are exchanges
between the FME and its upper-layer ME via γ_MGMT interface.

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