Page 950 - 5G Basics - Core Network Aspects

2 Transport aspects

Table 12-39 – TPS-TC capabilities of the FTU-O

Field name Format Description
Support of TPS-TCs One byte: [p0000000] Indicates TPS-TCs of each type that the FTU-O is capable to
(Note) support (both upstream and downstream directions):
• p=1 – supports PTM TPS-TCs
Downstream PTM Bearer channel Contains downstream capabilities of the supported PTM TPS-TC
TPS-TC capabilities descriptor
Upstream PTM TPS-TC Bearer channel Contains upstream capabilities of the supported PTM TPS-TC
capabilities descriptor
NOTE – For each supported TPS-TC, a bearer channel descriptor (see Table 12-40) shall be appended to the message.
The bearer channel descriptors shall have a format as defined in Table 12-40.

Table 12-40 – Bearer channel descriptor

Byte Content of field

1 and 2 Maximum NDR (NDR_max)
3 and 4 Minimum ETR (ETR_min)
5 Maximum delay (delay_max)
6 and 7 Minimum Impulse Noise Protection against SHINE (INP_min_shine)
8 SHINE ratio (SHINEratio)
9 Minimum Impulse Noise Protection against REIN (INP_min_rein)
10 Inter arrival time flag of REIN (iat_rein_flag)
11 Minimum R/N ratio (rnratio_min)

In the field "Maximum NDR", the parameter value for NDR_max represents the maximum net data rate
(NDR) allowed by the FTU-O for the bearer channel. The value shall not exceed the NDR_max value defined
in clause 11.4.2.2. The value shall be coded as an unsigned integer representing the data rate as a multiple
of 96 kbit/s. All other fields of the bearer channel descriptor in O-MSG 1 message shall be set to 0 and shall
be ignored by the FTU-R as those values are not negotiated. Those other fields are set in the O-TPS message
(see clause 12.3.4.2.3).

Field 4 "PMS-TC capabilities" indicates the PMS-TC capabilities of the FTU-O as shown in Table 12-41.

Table 12-41 – PMS-TC capabilities of the FTU-O

Field name Format Description
Max DS net data rate Two bytes Indicates the maximum downstream net data rate supported. The
unsigned 16-bit value is the net data rate divided by 96 kbit/s.
Max US net data rate Two bytes Indicates the maximum upstream net data rate supported. The unsigned
16-bit value is the net data rate divided by 96 kbit/s.
MB upstream One byte Minimal initial value of the logical frame down count (LFDC) supported by
the FTU in the upstream direction. Valid values are zero and one.
Field 5 "Downstream rate adaptation downshift SNR margin (RA-DSNRMds)": 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).

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