Page 763 - 5G Basics - Core Network Aspects

Transport aspects 2

Symbols are cyclically extended and transmitted onto the medium with an overlap, as defined in clause
10.4.4.

The electrical characteristics at the U interface are defined in clauses 7.3 to 7.6 and clause 14, and include
total aggregate wideband power; in-band and out-of-band transmit PSD, longitudinal balance and
termination impedance.

10.1.2 PMD_MGMT interface
The PMD_MGMT reference point describes a logical interface between the PMD and the FME, see Figure
10-1. The interface is defined by a set of control and management parameters (primitives). These
parameters are divided into two groups:

– parameters generated by the FME and applied to the PMD;
– parameters retrieved by the PMD from the received signal and submitted to the PMD ME.
The summary of the PMD_MGMT primitives is presented in Table 10-1.

Table 10-1 – Summary of the PMD_MGMT primitives

Primitive Direction Description Reference

TDD frame and superframe (fixed in showtime)
MF FME → PMD The number of symbol periods in a TDD frame. Clause 10.5
FME → PMD The number of downstream symbol positions in a
Mds Clause 10.5
TDD frame.
FME → PMD The number of upstream symbol positions in a
Mus Clause 10.5
TDD frame.
MSF FME → PMD The number of TDD frames in a superframe. Clause 10.6
DRMCds FME → PMD The downstream RMC symbol offset, in symbols. Clause 10.5.1
DRMCus FME → PMD The upstream RMC symbol offset, in symbols. Clause 10.5.1

FME → PMD Minimum number of data symbols in transmit
MNDSNOI Clause 12.3.4.2
direction per logical frame. (Note)
TDD frame and superframe (dynamic in showtime)

CNTSF FME → PMD Superframe count. Clause 10.6
CNTLF FME → PMD Logical frame count. Clause 10.5.1
FME → PMD Number of symbol positions in the. downstream Clause 10.7 and
TTRds
NOI Table 8-3
FME → PMD Clause 10.7 and
TTRus Number of symbol positions in the upstream NOI.
Table 8-3
FME → PMD Number of quiet symbol positions inserted at the Clause 10.7 and
TAds
beginning of the downstream DOI. Table 8-3
FME → PMD Number of quiet symbol positions inserted at the Clause 10.7 and
TAus
beginning of the upstream DOI. Table 8-3
FME → PMD Transmission opportunity in the downstream Clause 10.7 and
TBUDGETds
direction. Table 8-3
FME → PMD Transmission opportunity in the upstream Clause 10.7 and
TBUDGETus
direction. Table 8-3
FME → PMD Idle/Quiet selector for the DOI in the downstream Clause 10.7 and
TIQ
direction. Table 8-3

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