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Transport aspects 2

Table 8-3 – DRA related primitives of the data flow at the γO reference point

Primitive name (parameters) Direction Description
Confirms that the requested link state is valid and has
LinkState.confirm been accepted (LinkStateResult = LinkState) or that the
FTU-O → DRA
(LinkStateResult) requested link state change is invalid or could not be
completed (LinkStateResult = FAIL).
NOTE 1 – NDRR is a parameter received by the FTU-O over the γO reference point indicating the time interval in
logical frame periods between sequential upstream dynamic resource reports. It is communicated over the eoc to
the FTU-R. The FTU-R generates a DRRus.request primitive every NDRR logical frame periods.
NOTE 2 – NRM is a parameter received by the FTU-O over the γO reference point indicating the size of the resource
metric in the DRRus command (see Table 9-17). It is communicated over the eoc to the FTU-R (see Table 11-49).
NOTE 3 – The set value of the primitive shall be consistent with the rules of link state transitions defined in
Table 12-1, where some transitions require appropriate settings of the battery-operation (BAT) primitive.
If the FTU-O receives a TXOPds.indicate primitive during the downstream logical frame with CNTLF,ds = N,
the FTU-O shall transmit at downstream symbol positions according to this new configuration of
downstream transmission opportunities starting from the downstream logical frame with CNTLF,ds = N + 2.
If the FTU-O receives a TXOPus.indicate primitive during the downstream logical frame with CNTLF,ds = N +
MSF, the FTU-O shall ensure that the FTU-R transmits at symbol positions according to this new upstream
transmission opportunities configuration starting from the upstream logical frame with CNTLF,us = N + 3 via
proper communication of the upstream logical frame configuration request (see clause 9.6.4, Table 9-5 and
Table 9-7) and operating procedure per clause 10.7.
If the FTU-O receives a LinkState.request primitive, the FTU-O shall initiate a change of link state, if
necessary, at the earliest opportunity. When the change of link state is complete, the FTU-O shall respond
with a LinkState.confirm primitive with a value equal to the requested link state. If the state change
requested is not valid or could not be completed, the FTU-O shall respond with a LinkState.confirm
primitive with a result value equal to FAIL and the link state shall remain unchanged (see clause 12.1.1.6).
If the FTU-O receives a DRRus.request primitive, the FTU-O shall use the procedure defined in clause
11.2.2.17 to indicate the new NDRR value to the FTU-R. Upon receiving an acknowledgement of this new
NDRR value from the FTU-R, the FTU-O shall generate a DRRus.confirm primitive. The valid values of NDRR
shall be all integer values in the range from 0 to MSF, with NDRR = 0 indicating that the FTU-O shall not
generate DRRus.indicate primitives. The FTU-O and FTU-R shall support all valid values of NDRR.

If the FTU-O receives a DRRus.config.request primitive from the DRA function, the FTU-O shall use the
procedure defined in clause 11.2.2.17 to indicate the DRR configuration request data to the FTU-R. Upon
receiving an acknowledgement from the FTU-R, the FTU-O shall generate a DRRus.config.confirm primitive
to the DRA function with the DRR configuration confirmation data. The DRRus configuration
request/confirmation data are transported transparently through the FTU-O.

If the FTU-O receives an upstream dynamic resource report (DRRus) in the upstream RMC of the upstream
logical frame with CNTLF,us = N, the FTU-O shall generate a DRRus.indicate primitive with this DRRus no later
than during the upstream logical frame with CNTLF,us = N + 2.

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