Page 1232 - 5G Basics - Core Network Aspects

2 Transport aspects

Each group of M bytes in the ODTU2.M payload area may either carry M ODU bytes, or carry M stuff bytes.
The value of the stuff bytes is set to all-0s.

The groups of M bytes in the ODTU2.M payload area are numbered from 1 to 15232.
The ODTU2.M payload byte numbering for GMP M-byte (m-bit) blocks is illustrated in Figure 19-27. In row
1 of the ODTU2.M multiframe the first M-bytes will be labelled 1, the next M-bytes will be labelled 2, etc.

Figure 19-27 – ODTU2.M GMP byte numbering

19.6.2 Mapping ODUj into ODTU3.M
Groups of M successive bytes of the extended ODUj (j = 0, 2e, flex) signal are mapped into a group of M
successive bytes of the ODTU3.M payload area under control of the GMP data/stuff control mechanism.
Each group of M bytes in the ODTU3.M payload area may either carry M ODU bytes, or carry M stuff bytes.
The value of the stuff bytes is set to all-0s.

The groups of M bytes in the ODTU3.M payload area are numbered from 1 to 15232.
The ODTU3.M payload byte numbering for GMP M-byte (m-bit) blocks is illustrated in Figure 19-28. In row
1 of the ODTU3.M multiframe the first M-bytes will be labelled 1, the next M-bytes will be labelled 2, etc.

Figure 19-28 – ODTU3.M GMP byte numbering

19.6.3 Mapping ODUj into ODTU4.M
Groups of M successive bytes of the extended ODUj (j = 0, 1, 2, 2e, 3, flex) signal are mapped into a group
of M successive bytes of the ODTU4.M payload area under control of the GMP data/stuff control

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