Page 1056 - 5G Basics - Core Network Aspects

2 Transport aspects

Figure Z.4 – TMF-R functional model

Z.4.2 DRRUSF

The DRRUSF forwards the DRRus.request from the FTU-R to the TMF-R, formats the QSR-US-QF
(see Table Z.4) received from the TMF-R into an upstream dynamic resource report (DRRus), (see Annex Y)
that is forwarded to the FTU-R over the R reference point as shown in Figure Z.5. The DRA extracts the
DRRus and forms the QSI-US-QF (see Table Z.2) sent to the LRCC-O.
QFUQ represents the queue fill metric for upstream QoS queue Q contained in each upstream queue fill

status report (QSR-US-QF). QFUQ values are indicated by the DRA on receipt of a DRRus.indicate primitive
from the FTU-O, to form an upstream queue fill status report (QSI-US-QF at the DPU).

Figure Z.5 – DRRUSF functional model

Z.5 Generic information flows

Z.5.1 Data flows
The following are requirements for information flows to and from the transceiver.

Z.5.1.1 The  reference point

Flow control primitives at the  reference point are the same as for the reference point as defined in
Table 8-1.

Data flow primitives at the  reference point are the same as for the reference point as defined in
Table 8-2.

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