Page 884 - 5G Basics - Core Network Aspects

2 Transport aspects

5). If the procedure is not completed successfully ("fail", see Figures 12-4 and 12-5), then no link state
transition shall occur.

12.1.1.2 L3 – Idle state
L3 is the link state in which the FTU-O is provisioned through a management interface for the service
desired by the operator. In this link state, both the FTU-O and FTU-R do not transmit any signal.
12.1.1.3 L0 – Normal operation state

L0 is the full power state used during normal operation. This mode allows for bit rates over all lines up to
the maximum values determined by the configured MF and Mds with no compromise on QoS, including one-
way latency.

When all the lines operate at their maximum bit rates, the power consumption and dissipation reach their
maximum level.

Discontinuous operation is efficiently used in this state to reduce power consumption, providing that
symbols are not transmitted if no data is available. The details of discontinuous operation method are
described in clause 10.7.

Figure 12-2 presents an example of downstream transmission during the L0 state. During the presented
TDD frame MSF-1, lines 3 and 7 use all symbol positions available by the configured MF and Mds symbol
values for transmission, while all other lines in TDD frame MSF-1use discontinuous operation and thus only a
part of the available symbol positions are used.

Figure 12-2 – Example of L0 link state operation in the downstream direction

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