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Transport aspects 2

Z.5.2 Control Flows

Z.5.2.1 The O reference point

Table Z.1 defines the traffic monitoring primitives at the DPU associated with the  reference point.
Table Z.2 defines the parameters of these primitives. With these control flows, these parameters are
known to the DRA and the LRCC-O.

Table Z.1 – Information flows at the O reference point

Primitive name Content Direction
Requests queue status information for all DS QoS DRA → TMF-O
QS.request queues
DRA → LRCC-O
Queue status information for all DS QoS queues in TMF-O → LRCC-O
QS.response response to QS.request (See Table Z.2)
TMF-O → DRA
Queue status information for all US QoS queues as
QS.indicate contained in the most recently received DRRus DRA → LRCC-O
information

Table Z.2 – Traffic monitoring parameters at the O reference point

Primitive name Primitive parameter Description

QS.response QSR-DS-QA Array [1  NQOSQds] of QADQ, the number of bytes
arriving at the inlet of L2+ downstream QoS Queue Q, for
all provisioned queues in the DPU, measured since the
last previous receipt of QS.request
QSR-DS-QF Array [1  NQOSQds] of QFDQ the number of bytes in the
L2+ downstream QoS Queue Q, for all provisioned queues
in the DPU, measured on receipt of QS.request

QSR-US-QA QAUA the number of bytes observed in STREAMus,
measured since last previous receipt of QS.request

QS.indicate QSI-US-QF Array [1  NQOSQus] of QFUQ the number of bytes in the
L2+ upstream QoS Queue Q, for all provisioned queues in
the NT, contained in the most recently received DRRus
information

Z.5.2.2 The R reference point

Table Z.3 defines the traffic monitoring primitives at the NT associated R reference point. Table Z.4 defines
the parameters of these primitives. With these control flows and control flows defined at other reference
points, these parameters are known to the DRA and the LRCC-O.

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