Page 1033 - 5G Basics - Core Network Aspects

Transport aspects 2

Figure X.1 – Reference model of a DPU intended for operation in
a crosstalk-free environment

For DTA, the DRA block monitors traffic-related information from each FTU-O and the L2+ block (given for
each direction, downstream and upstream). Based on this information, and knowledge of the current Mds
and Mus, the DRA decides when to make changes to the TDD frame configuration of each FTU-O in order to
modify the number of symbol periods to be allocated to the downstream (Mds), thereby resulting in a
change to the number of symbol periods allocated to the upstream (Mus). To implement this change to the
TDD frame configuration, the DRA initiates the DTA procedure defined in clause X.6.2. See Annex T for
higher layers control aspects of DTA.

X.5 Profiles

X.5.1 Annex X profiles 106c and 212c for operation over coaxial cables in a crosstalk-free environment
ITU-T G.9701 transceivers for operation over coaxial cables in a crosstalk-free environment shall comply
with at least one profile specified in Table X.1. Compliance with more than one profile is allowed.
To be compliant with a specific profile, the transceiver shall comply with all parameter values presented in
Table X.1 associated with the specific profile.

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