Page 647 - 5G Basics - Core Network Aspects

Transport aspects 2

Figure 8-3 – Mapping of six [CPRI] option 3 signals into the OPU2r payload
8.2.2 Mapping of three [CPRI] option 4 signals into OPU2r

The [CPRI] option 4 signals are augmented by adding padding bytes to match the signal rate of [CPRI]
option 5. Padding is implemented by inserting three pad bytes after every five data bytes. The value
inserted in the padding bytes shall be 0x00. Padding bytes are ignored and discarded by the receiver.
Three [CPRI] option 4 signals are byte interleaved. In the OPU2r frame carrying OMFI = 0x00, the first
OPU2r payload byte corresponds to a byte of the first CPRI signal, the second OPU2r payload byte
4
corresponds to a byte of the second CPRI signal and so on (see Figure 8-4).
The BFPi and BaFNi associated with CPRI signals 1 to 3 are located in row 15 and 16 of the OPU2r frame
carrying OMFI = 0x00 (see Figure 8-4).

8.2.3 Mapping of three [CPRI] option 5 signals into OPU2r
Three [CPRI] option 5 signals are byte interleaved. In the OPU2r frame carrying OMFI = 0x00, the first
OPU2r payload byte corresponds to a byte of the first CPRI signal, the second OPU2r payload byte
corresponds to a byte of the second CPRI signal and so on (see Figure 8-4).

The BFPi and BaFNi associated with CPRI signals 1 to 3 are located in row 15 and 16 of the OPU2r frame
carrying OMFI = 0x00 (see Figure 8-4).

Figure 8-4 – Mapping of three [CPRI] option 4 (after padding) or 5 signals
into the OPU2r payload

5

637