Page 712 - 5G Basics - Core Network Aspects

2 Transport aspects

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)
UPBO PSD mask By the FTU-R at the Not communicated. Applies to all signals during the
(UPBOMASK) beginning of the channel channel discovery phase of the
discovery phase of the initialization and thereafter.
initialization.
Downstream start PSD At the beginning of Not communicated. During the O-VECTOR 1 stage of
(STARTPSDds) initialization. the channel discovery phase of
the initialization for signal O-P-
VECTOR 1.
Upstream start PSD At the beginning of the STARTPSDus is sent by During the channel discovery
(STARTPSDus) channel discovery phase the FTU-R to the phase of the initialization for
of the initialization. FTU-O in the R-MSG1 signals starting from R-P-VECTOR
message. 1 up to and including
R-P-CHANNEL-DISCOVERY 2.
Channel discovery PSD During channel discovery CDPSDds is sent by During the channel discovery
downstream (CDPSDds) phase; the FTU-O the FTU-O to the phase of the initialization for
determines CDPSDds. FTU-R in the signals starting from O-P-
O-SIGNATURE CHANNEL-DISCOVERY 1-1 up to
message. and including O-P-SYNCHRO 3.

Channel discovery PSD During the channel CDPSDus is sent by During the channel discovery
upstream (CDPSDus) discovery phase, the the FTU-R to the phase of the initialization for
FTU-R derives CDPSDus FTU-O in the R- signals starting from R-P-VECTOR
from the STARTPSDus by UPDATE message. 1-1 up to and including
applying MAXMASKus R-P-PRM-UPDATE 2.
constraints indicated in
the received O-UPDATE
message.

PSD ceiling downstream The FTU-R determines MAXMASKds is sent Applies to downstream signals
(MAXMASKds) MAXMASKds during the by the FTU-R to the starting from O-P-VECTOR 2 in
CHANNEL DISCOVERY 2 FTU-O in the the channel discovery phase of
stage of the channel R-UPDATE message. the initialization (See V2PSDds).
discovery phase of the
initialization.
PSD ceiling upstream The FTU-O determines MAXMASKus is sent Applies to upstream signals
(MAXMASKus) MAXMASKus during the by the FTU-O to the starting from R-P-VECTOR 1-1 in
channel discovery 2 stage FTU-R in the the channel discovery phase of
of the channel discovery O-UPDATE message. the initialization (see V2PSDds).
phase of the
initialization.
V2PSDds During the CHANNEL Not communicated. During the channel discovery
DISCOVERY 2 stage of the phase of the initialization for
channel discovery phase signals starting from O-P-VECTOR
of the initialization, the 2 up to and including
FTU-O derives V2PSDds O-P-SYNCHRO 4.
by applying MAXMASKds
constraints indicated in
the received R-UPDATE
message.

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