Page 747 - 5G Basics - Core Network Aspects

Transport aspects 2

Table 9-8 – Upstream RMC command (sent by FTU-R only)

Field name Format Description
Current active bit-loading One byte: [bbbb aaaa] Indication for the active bit-loading table to be used in the
table identifier current logical frame, expressed as a value of FCCC
(see clause 13.3.1.1.3).
aaaa = Identifier for the active bit-loading table to be used
over the NOI.
bbbb = Identifier for the active bit-loading table to be
used over the DOI (Note 1).
Settings associated with One byte: [aa 000000] Contains settings associated with the supported options
supported options (Note 2)
aa = indicator bits for RPF in the following order [dgl ohp]
(see clause 11.3.3.2).
An indicator bit shall be set to 0 if the corresponding
primitive occurs and set to 1 otherwise (active low).
All other bits are reserved by ITU-T and shall be set to 0.

NOTE 1 – If only the NOI is used (i.e., if TTR ds ≥ TBUDGET ds) for a given logical frame, the identifier corresponding to the DOI shall
be set to 0000 by the transmitter and ignored by the receiver.
NOTE 2 – This byte shall be present if and only if support of at least one of the options for which settings are conveyed via this
byte are indicated by both FTUs during initialization (first byte of the field "supported options", see clauses 12.3.4.2.1 and
12.3.4.2.2).

Table 9-9 – Format for upstream logical frame parameters

Field name Format Description

TTRus One byte: [00 aaaaaa] aaaaaa = TTRus, the number of symbol positions in the NOI of the
logical frame, coded as an unsigned integer.
Valid range is from one to 25 inclusive.
TAus One byte: [000 aaaaa] aaaaa = TAus, the number of quiet symbols at the beginning of the
DOI of the logical frame, coded as an unsigned integer.
Valid range is from zero to 24 inclusive.

TBUDGETus One byte: [00 aaaaaa] aaaaaa = the value of the parameter TBUDGETus (see clause 10.7),
coded as an unsigned integer.
Valid range is from one to 25 inclusive.

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