Page 742 - 5G Basics - Core Network Aspects

2 Transport aspects

Table 9-3 – Structure of an RMC command

Field name Format Description
Command header 1 byte: [b7b6aa aaaa] aaaaaa = command ID.
(Note) The command ID is a unique six bit code that identifies the
command. See Table 9-4 for a complete list of commands.
b6 and b7 – Reserved for use by ITU-T
Command data See specific commands' descriptions.
NOTE – Command header is not present for the first command of the RMC message.

Table 9-4 summarizes the different RMC commands.

Table 9-4 – RMC commands

Command name Command ID Description/comments Reference
Downstream RMC N/A Shall be included as the first See Table 9-5
command in every downstream RMC
message.

Upstream RMC N/A Shall be included as the first See Table 9-8
command in every upstream RMC
message.

Receiver initiated FRA request 0316 May be included in any given RMC See Table 9-10
message.
0416 See Table 9-11
Up to two such commands may be
used within a single RMC message,
one command per operation interval.
Reply to FRA request (FRA-R) 0516 Shall be included in response to an See Table 9-13
FRA request.
0616 See Table 9-14
Up to two such commands may be
used within a single RMC message,
one command per operation interval.
Reply to SRA request (SRA-R) 0816 Shall be included in response to a See Table 9-15
request for seamless rate adaptation
(SRA) including a request for bitswap
or a TIGARESP to indicate the instant
of parameter modification.

Reply to RPA request (RPA-R) 0716 Shall be included in response to a RPA See Table 9-16
request
Upstream DRR reports 1016 Shall be included every NDRR logical See Table 9-17
frames.
L2 transition indicator 1116 Shall be included in response to a See Table 9-17.1
(L2-TRNS) LinkState transition confirmation to
indicate the instant of LinkState
transition.
Reply to L2TSA request 1216 Shall be included in a response to an See Table 9-17.2
(L2TSA-R) L2TSA request to indicate the instant
of parameter modification.
1316 Allocated for use by Annex X See clause X.6.11

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