Page 951 - 5G Basics - Core Network Aspects

Transport aspects 2

Field 6 "Downstream rate adaptation downshift time interval (RA-DTIMEds)": The definition and use of this
parameter is specified in clause 13.2.1.1.2. The field shall be formatted as a 16-bit unsigned integer with
LSB weight of one second and has a valid range between zero and 16 383 s (3FFF16).
Field 7 "Downstream rate adaptation upshift SNR margin (RA-USNRMds)": The definition and use of this
parameter is specified in clause 13.2.1.1.2. The field shall be formatted as a 16-bit unsigned integer with
LSB weight of 0.1 dB and has a valid range between zero and 31.0 dB (013616).

Field 8 "Downstream rate adaptation upshift time interval (RA-UTIMEds)": The definition and use of this
parameter is specified in clause 13.2.1.1.2. The field shall be formatted as a 16-bit unsigned integer with
LSB weight of one second and has a valid range between 0 and 16 383 s (3FFF16).

Field 9 "Downstream FRA time window (FRA-TIMEds)" contains the value of the FRA triggering parameter
fra-time-ds. The parameter is used in the specification of the FRA procedure and is defined in clause
13.3.1.1.1.1.
The valid range of non-zero values is from one logical frame length to one superframe length in steps of
one logical frame length. The valid value 0 shall be used to indicate that both monitoring of the percentage
of degraded subcarriers (see clause 13.3.1.1.1.2) and monitoring of the number of rtx-uc anomalies
(see clause 13.3.1.1.1.3) are disabled (see clause 13.3.1.1.1.5).
Field 10 "Downstream FRA minimum percentage of degraded tones (FRA-NTONESds)" contains the value of
the FRA triggering parameter fra-ntones-ds. The parameter is used in the specification of the FRA
procedure and defined in clause 13.3.1.1.1.2.

The valid range of non-zero values is from 1 to 100 (6416) in steps of 1. The valid value 0 shall be used to
indicate that monitoring of the percentage of degraded subcarriers is disabled (see clause 13.3.1.1.1.5). If
the value of fra-time-ds is 0, then the value of fra-ntones-ds shall be set to 0.

Field 11 "Downstream FRA minimum number of rtx-uc anomalies (FRA-RTX-UCds)" contains the value of the
FRA triggering parameter fra-rtx-uc-ds. The parameter is used in the specification of the FRA procedure and
defined in clause 13.3.1.1.1.3.
The valid range of non-zero values is from 1 to 1 023 (03FF16) in steps of 1. The valid value 0 shall be used to
indicate that monitoring of the number of rtx-uc anomalies is disabled (see clause 13.3.1.1.1.5). If the value
of fra-time-ds is 0, then the value of fra-trx-uc-ds shall be set to 0.
Field 12 "Downstream FRA vendor discretionary criteria (FRA-VENDISCds)" contains the value of the FRA
triggering parameter fra-vendisc-ds. The parameter is used in the specification of the FRA procedure and
defined in clause 13.3.1.1.1.4.

If set to ONE, then vendor discretionary FRA triggering criteria may be used. If set to ZERO, then vendor
discretionary FRA triggering criteria shall not be used (see clause 13.3.1.1.1.5).

Field 13 "Channel-initialization policy (CIpolicy)" indicates the channel-initialization policy.
The field is formatted as [0000 000p].

– p = 0 to indicate that CIpolicy=0 shall be used
– p = 1 is reserved by ITU-T.
Field 14 "Fast-retrain policy (FRpolicy)" indicates the fast-retrain policy.

The field is formatted as [0000 000p].
– p = 0 to indicate that FRpolicy=0 shall be used
– p = 1 is reserved by ITU-T.
Field 15 "Downstream los defect persistency (LOS-PERSISTENCYds)" contains the value of the control
parameter los_persistency-ds divided by 100. The parameter is used in the fast-retrain trigger criteria (see
clause 12.1.4.2) and is defined in clause 12.1.4.3.1. The field has valid values from 1 to 20 (1416) in
steps of 1.

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