Page 711 - 5G Basics - Core Network Aspects

Transport aspects 2

NOTE – Table 7-2 specifies PSDs and PSD masks at every frequency (i.e., in both the passband and the stopbands). To
avoid communication of redundant information, the messages during the initialization corresponding to the PSDs in
Table 7-2 do not describe all the PSDs in the full frequency range, nor do they describe the RFI bands and IAR bands.
The PSDs in Table 7-2 may be computed from other PSDs and values that are communicated during the initialization.
The process of determining the transmit PSDs and PSD masks of the FTU during the initialization and
showtime is summarized in Table 7-3.

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)
Limit PSD mask Configuration of the Not communicated. By the FTU-O, before the start of
(LIMITMASK) DPU-MIB before the start initialization, to calculate the
of initialization. downstream and upstream
transmit PSD masks.
MIB PSD mask Configuration of the Not communicated. By the FTU-O, before the start of
(MIBPSDMASK) DPU-MIB before the start initialization, to calculate the
of initialization. downstream and upstream
transmit PSD masks.
RFI bands (RFIBANDS) Configuration of the RFIBANDS is sent by Notches are applied in
DPU-MIB before the start the FTU-O to the designated bands in applicable
of initialization. FTU-R during the ITU- transmission direction(s) from
T G.994.1 handshake the start of the channel discovery
phase of the phase of the initialization and
initialization. thereafter.
IAR bands (IARBANDS) Configuration of the IARBANDS is sent by Notches are applied in
DPU-MIB before the start the FTU-O to the designated bands in applicable
of initialization. FTU-R during the ITU- transmission direction(s) from
T G.994.1 handshake the start of the channel discovery
phase of the phase of the initialization and
initialization. thereafter.
Subcarrier masking Configuration of the Not communicated. By the FTU-O, before the start of
(CARMASK) DPU-MIB before the start initialization, to calculate the
of initialization. downstream and upstream
SUPPORTEDCARRIERS sets.

SUPPORTEDCARRIERS By the FTU-O before the SUPPORTEDCARRIERS For all signals during the channel
start of initialization. ds and discovery phase of the
SUPPORTEDCARRIERS initialization.
us are sent by the
FTU-O to the FTU-R in
the O-SIGNATURE
message.
MEDLEY By the FTU-O during the MEDLEYds and For all signals during the channel
parameter update stage MEDLEYus are sent by analysis and exchange phase of
of the channel discovery the FTU-O to the FTU- the initialization.
phase of the R in the O-PRM
initialization. message.
Transmit PSD mask By the FTU-O and VCE PSDMASKds and Applies to all signals during the
(PSDMASK) before the start of PSDMASKus are sent channel discovery phase of the
initialization. by the FTU-O to the initialization.
FTU-R in the
O-SIGNATURE
message.

701