Page 1119 - 5G Basics - Core Network Aspects

Transport aspects 2

ODU ODU payload ODU ODU2 ODU2 payload ODU2 ODU1 ODU1 payload ODU1
OH OH OH
ODTU3.ts ODU ODTU23 ODTU13
JOH (ODU0, ODU2e, ODUflex) ODTU3.ts JOH ODU2 ODTU23 JOH ODU1 ODTU13

ODTU3.ts ... ODTU3.ts ODTU23 ... ODTU23 ODTU13 ... ODTU13 ODU ... ODU ODU2 ... ODU2 ODU1 ... ODU1 ODTUG3
JOH JOH JOH JOH JOH JOH (0, 2e, flex) (0, 2e, flex) (PT = 21)

ODTUG3 (PT = 21)

OPU3 OPU3 payload OPU3
OH
ODU3 ODU3 payload ODU3
OH

G.709-Y.1331(12)_F7-6
Figure 7-6  ODU0, ODU1, ODU2, ODU2e and ODUflex into ODU3 multiplexing method
via ODTUG3 (PT=21)

Figure 7-7 presents the multiplexing of up to eighty ODU0 signals and/or up to forty ODU1 signals and/or
up to ten ODU2 signals and/or up to ten ODU2e signals and/or up to two ODU3 signals and/or up to eighty
ODUflex signals into the OPU4 signal via the ODTUG4 (PT=21). An ODU0 signal is extended with a frame
alignment overhead and asynchronously mapped into the optical data tributary unit 4.1 (ODTU4.1) using
the GMP justification overhead (JOH). An ODU1 signal is extended with a frame alignment overhead and
asynchronously mapped into the optical data tributary unit 4.2 (ODTU4.2) using the GMP justification
overhead. An ODU2 signal is extended with a frame alignment overhead and asynchronously mapped into
the optical data tributary unit 4.8 (ODTU4.8) using the GMP justification overhead (JOH). An ODU2e signal
is extended with a frame alignment overhead and asynchronously mapped into the optical data tributary
unit 4.8 (ODTU4.8) using the GMP justification overhead. An ODU3 signal is extended with a frame
alignment overhead and asynchronously mapped into the optical data tributary unit 4.31 (ODTU4.31) using
the GMP justification overhead. An ODUflex signal is extended with a frame alignment overhead and
asynchronously mapped into the optical data tributary unit 4.ts (ODTU4.ts) using the GMP justification
overhead (JOH). Up to eighty ODTU4.1 signals, up to forty ODTU4.2 signals, up to ten ODTU4.8 signals, up
to two ODTU4.31 and up to eighty ODTU4.ts signals are time-division multiplexed into the optical data
tributary unit group 4 (ODTUG4) with payload type 21, after which this signal is mapped into the OPU4.

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