Page 1015 - 5G Basics - Core Network Aspects

Transport aspects 2

Bytes 11-14 are allocated for the optional-attribute and attribute execution masks; however, the contents
of these bytes are only valid in conjunction with result code 1001 used to indicate failed or unknown
attributes. When the result code is not 1001, these bytes shall be set to 0 by the NT transmitter and
ignored by the DPU receiver.

S.5.3 Start software download

Table S.6 – Start software download message

Field Byte 7 6 5 4 3 2 1 0 Comments
Datagram protocol 1 0 0 0 0 0 0 0 1 NT software management = 0116
identifier

Transaction correlation 2-3
identifier

Message type 4 0 1 0 1 0 0 1 1 AR = 1, AK = 0, MT = 19
Action = start software download.

Managed software 5 Software image instance
image instance 0 instance 0

1 instance 1
2..254 vendor-specific use
255 reserved by ITU-T
Message contents 6-7 Length of message contents field in bytes
length = 5 (Note 1).
Message contents 8 Window size (represented as a number of
sections) minus one (Note 2).
9-12 Image size in bytes (Note 3).

NOTE 1 – This field shall be coded as an unsigned integer on 16 bits [b 15 … b 0], where b 0 is the LSB. Byte 6 shall represent [b 15 …
b 8] and byte 7 shall represent [b 7 … b 0].
NOTE 2 – This value shall be coded as an unsigned integer on 8 bits [b 7 … b 0], where b 0 is the LSB.
NOTE 3 – This value shall be coded as an unsigned integer on 32 bits [b 31 … b 0], where b 0 is the LSB. Byte 9 shall represent [b 31 …
b 24] and byte 12 shall represent [b 7 … b 0].
S.5.4 Start software download response

The response contains a result code in byte 8, and a window size counter-proposal (which may be the same
as that suggested by the DPU in the original request) in byte 9.

Table S.7 – Start software download response message
Field Byte 7 6 5 4 3 2 1 0 Comments

Datagram protocol 1 0 0 0 0 0 0 0 1 NT software management = 0116
identifier
Transaction correlation 2-3
identifier
Message type 4 0 0 1 1 0 0 1 1 AR = 0, AK = 1, MT = 19
bits 5-1: action = start software download
response.

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