Page 875 - 5G Basics - Core Network Aspects

Transport aspects 2

This data format supports a SATN_US granularity of 0.1 dB and an SATN_US range from 0.1 dB to 100.0 dB,
corresponding to the set of valid values of satnus = 1 to 1000.

A special value satnus = 0 indicates a value of SATN_US = 0 dB or lower.
A special value satnus = 1001 indicates a value of SATN_US = 100.1 dB or higher.
A special value satnus = 1023 indicates that the parameter is undetermined. All other values for satnus are
reserved by ITU-T.

11.4.1.2.8 Actual transmit PSD per subcarrier (ACTPSD-ps)
The test parameter ACTPSDps is the actual transmit PSD for a particular subcarrier at the U interface, as
calculated into the termination impedance (see clause 7.3 of [ITU-T G.9700]).
NOTE – ACTPSDds includes the direct signal as well as the precoder compensation signals.
The test parameter ACTPSDps values are computed by the VCE, and reporting is according to the
description in this clause. The exact method used by the VCE to calculate the values of ACTPSDps is vendor
discretionary.
The ACTPSDps is updated on request during showtime L0, L2.1N, L2.1B and L2.2 link states.

The ACTPSDps value is reported as ACTPSDps in the DPU-MIB.
The downstream and upstream values are reported in the DPU-MIB.
Each reported ACTPSDps value shall be represented by an integer number p. The values of p shall be coded
as eight-bit unsigned integers so that:
ACTPSDps = − (p/2) dBm/Hz

This format supports an ACTPSDps granularity of 0.5 dB with a valid range from −0.5 to −125.5 dBm/Hz,
corresponding to the set of valid values of p=1 to 251.

A special value p = 0 indicates a value of ACTPSD= 0 dBm/Hz or higher.
A special value p = 252 indicates a value of ACTPSD= −126.0 dBm/Hz or lower.

A special value p = 253 is reserved by ITU-T.
A special value p = 254 indicates that the subcarrier is not transmitted.

A special value p = 255 indicates that the parameter is undetermined.
11.4.1.2.9 FEXT downstream coupling coefficients (Xlogpsds)

11.4.1.2.9.1 Definition

11.4.1.2.9.1.1 FEXT coupling coefficient from line L into line L
1
2
The downstream FEXT coupling coefficient from line L into line L over the frequency f is defined as
1
2
the ratio of the FEXT insertion gain transfer function from line L into line L to the direct channel
2
1
insertion gain transfer function of line L as follows:
1
 FEXT _ IG _ DS ( ) f 
Xlogds 12 ( ) f  20  log 10  12 


 IG _ DS 11 ( ) f 
where:

FEXT _ IG _ DS 12 ( ) f is the FEXT insertion gain transfer function from line L into line L in the
1
2
downstream direction over frequency f, and

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