Page 846 - 5G Basics - Core Network Aspects

2 Transport aspects

Table 11-47 – Probe sequence update response transmitted by the FTU-R

Name Length (bytes) Byte Content

ACK 2 2 8016 (Note)
NACK 3 2 8116 (Note)
3 One byte for reason code (see Table 11-48)
NOTE – All other values for this byte are reserved by ITU-T.

Table 11-48 – NACK reason codes

Value (Note) Definition
0116 Invalid set of parameters.
NOTE – All other reason codes are reserved by ITU-T.

For the upstream probe sequence update command, the FTU-R shall apply the change only after sending
the ACK message. If interruption of the current probe sequence is allowed, the update shall occur within
40 ms after sending the ACK message.

The timing diagram of the upstream probe sequence update eoc command and response is shown in
Figure 11-5.

Figure 11-5 – Timing diagram of the upstream probe sequence update
command and response

For the downstream probe sequence update command, the FTU-O shall apply the change after receiving
the ACK message. If interruption of the current probe sequence is allowed, the update shall occur within
40 ms after receiving the ACK message.
The timing diagram of the downstream probe sequence update eoc command and response is shown in
Figure 11-6.

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