Page 713 - 5G Basics - Core Network Aspects

Transport aspects 2

Table 7-3 – Time aspects for determination, communication and
use of PSDs and PSD masks

When communicated
Parameter When determined When used
between FTUs (Note)
PRMPSD (PRMPSDds) During the VECTOR 2 Not communicated. During the channel discovery
stage of the channel phase of the initialization for
discovery phase of the signals starting from O-P-PRM-
initialization. UPDATE 1 up to and including
O-P-SYNCHRO 5.
MEDLEY reference PSD At the end of the channel The FTU-O Applies to all signals starting from
mask discovery phase of the communicates the the beginning of the channel
initialization; the FTU-O MREFPSDMASKus to analysis and exchange phase of
(MREFPSDMASK)
determines the FTU-R in O-PRM the initialization and thereafter
MREFPSDMASKds, and message. during the initialization and
the FTU-O determines showtime.
MREFPSDMASKus.
MEDLEY reference PSD The FTU-O determines MREFPSDds is not During the channel analysis and
downstream MREFPSDds at the end of communicated. exchange phase of the
the channel discovery initialization for signals starting
(MREFPSDds)
phase of the from O-P-MEDLEY up to and
initialization. including O-P-SYNCHRO 6.
MEDLEY reference PSD The FTU-R determines MREFPSDus is sent by During the channel analysis and
upstream MREFPSDus at the end of the FTU-R to the exchange phase of the
the channel discovery FTU-O in the R-PRM initialization for signal R-P-
(MREFPSDus)
phase of the message. MEDLEY.
initialization.
Showtime PSD (STPSD) At the end of the channel Determined by the During the showtime.
analysis and exchange MREFPSD and in the
phase of the upstream direction
initialization. also by the gain values
(gi) communicated
during the channel
analysis and exchange
phase (O-PMD
message) and during
the showtime (OLR).
NOTE – Only the minimum set of relevant parameters characterizing PSDs and PSD masks is communicated during the
initialization. The communication protocols and formats are described in clause 12.

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