Page 1120 - 5G Basics - Core Network Aspects

2 Transport aspects

ODU ODU payload ODU
OH

ODTU4.ts ODU ODTU4.ts
JOH (0, 1, 2, 2e, 3, flex)

ODTU4.ts ... ODTU4.ts ODU ....... ODU ODTUG4 (PT = 21)
JOH JOH

ODTUG4 (PT = 21)

OPU4 OPU4 payload OPU4
OH

ODU4 ODU4 payload
OH ODU4
G.709-Y.1331(12)_F7-7

Figure 7-7  ODU0, ODU1, ODU2, ODU2e, ODU3 and ODUflex
into ODU4 multiplexing method via ODTUG4 (PT=21)

Figure 7-8 presents the multiplexing of up to 10n ODU0 signals and/or up to 10n ODU1 signals and/or up to
10n ODU2 signals and/or up to 10n ODU2e signals and/or up to int(10n/4) ODU3 signals and/or up to n
ODU4 signals and/or up to 10n ODUflex signals into the OPUCn signal via the ODTUGCn (PT=22). An ODUk
signal is extended with frame alignment overhead and asynchronously mapped into the Optical Data
Tributary Unit Cn.ts (ODTUCn.ts) (<k,ts> = <0,1>, <1,1>, <2,2>, <2e,2>, <3,8>, <4,20>, <flex,ts>) using the
GMP justification overhead (JOH). Up to 10n ODTUCn.1 signals, up to int(10n/4) ODTUCn.4 signals, up to n
ODTUCn.10 signals and up to 10n ODTUCn.ts signals are time-division multiplexed into the Optical Data
Tributary Unit Group Cn (ODTUGCn) with Payload Type 22, after which this signal is mapped into the
OPUCn.

ODU ODU payload
OH ODU
ODTUCn.ts ODU ODTUCn.ts
JOH (0,1,2,2e,3,4,flex)

ODTUCn.ts . . . ODTUCn.ts ODU . . . . . . ODU ODTUGCn.ts
JOH JOH (PT=22)

ODTUGCn.ts (PT=22)

OPUCn
OH OPUCn payload OPUCn

ODUCn ODUCn payload ODUCn
OH
G.709-Y.1331(12)_F7-8

Figure 7-8  ODU0, ODU1, ODU2, ODU2e, ODU3, ODU4 and ODUflex
into ODUCn multiplexing method via ODTUGCn (PT=22)

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