Optics for OTU4 inter-Domain Interface similar to 100GBASE-LR4 and ER4 applicable to OTU4
TS80 [81]
TSO
Trib Port#
S6
S6
S6
Additional optical implementations such as 10λ*10G can be considered
PMA CAUI PMA PMD PMD MDI Optical Medium PMA
OTU4 OH
OPU4 Payload ODU4 Payload
OPU4 ODU4
OTU4 FEC
65 D1 C0 D1 D1 D0 D0 D0 D0 D0 D0 D0 C1 C1 D2 C2 C2 C2 D3 C3 C3 C3 C3 O0 D4 C4 C4 C4 C4 C4 D4 D4 D4 D5 C5 D6 C6 D7 C7 D7 C7 C7 C7 C7 C7 C7 C7 D6
S3
S4
S5
S6
S7
Input to descrambler function
S0
S1
S2
S3
S4
S5
S6
S7
SP2 PMD
SP5
25.78125Gb/s
4
PSI OMFI 41 42
79 80 1 2
PMA 10:4 PMD
5:1
...
5:1
5:1
5:1
PMD
L8 L9 L 0 L 1 L 2 L 3 SP3
OPU4 OH
Client (e.g. 100GE)
ODU Multiplexing
ODU OH
ODU Payload
ODU ODTU4.ts
OPU4 Payload
OPU4
OTU4 TC L1
ODU4 Multiplexing
ODU4 TCMOH
ODTU4.ts JOH
ODTU4.ts JOH
ODU (0, 1, 2, 2e, 3, 4, flex)
100GBASE-SR10
850 nm MMF 100 m in OM3 125 m in OM4
100GBASE-LR4
1310 nm SMF 4λ*25.78Gb/s 10 km
100GBASE-ER4
1310 nm SMF 4λ*25.78Gb/s 30 km or 40 km (engineered links)
39 40 41 42
TxD <0> CGMII Output of encoder function Sync header D0 D1
TxD <63> CGMII Input to decoder function
RxD<0>
RxD<63>
PMA 20:10
2:1
2:1
...
2:1
2:1
2:1
...
JC1 JC2 JC3 C1 C9 C2 C10 C3 C11 C4 C5 C12 C13 CRC-8 D1 D6 D2 D7 C6 C14 C7 II C8 DI
S1
S1
S1
FA OTU4 OH OPU4 OH OPU4 Payload Fixed Stuff OTU4 FEC 1 2 3 4 2 3 FAS RES TCM3 GCC1 GCC2 TCM ACT TCM2 APS/PCC TCM6 TCM1 4 5 6 7 MFAS 8 9 SM TCM5 PM RES 10 11 12 13 RES FTFL EXP 255 OPU4 OH 14 15 16 0 1 PT Mapping & Concat. Specific GCC0 TCM4 15 JC4 JC5 JC6 PSI 16 JC1 JC2 JC3 OMFI Justification via GMP
SFD
6 bytes
Destination MAC address
6 bytes
Source MAC address
4 bytes
4 bytes
FCS
Signal Structure
IEEE Model with CAUI
(to interconnect chip devices)
Higher Layers (e.g., IP) LLC or other MAC Client MAC Reconciliation CGMII 100GBASE-R PCS
RxB<65>
RxB<131>
RxB<1319> PCS Lane 19
CAUI CGMII CFI CPPI FCS LLC LWDM MAC MDI PCS
100 Gb/s Attachment Unit Interface 100 Gigabit Media Independent Interface Canonical Format Indicator 100 Gb/s Parallel Physical Interface Frame Check Sequence Logical Link Control LAN Wave Division Multiplexing Media Access Control Media Dependent Interface Physical Coding Sublayer
User Priority
C F I
VID: VLAN ID
Type/ Values > 1535 are Ethernet Types Length Values ≤ 1500 are for Length of the MAC frame with preamble/SFP and typically used with LLC/SNAP in the MAC Payload
OPU4 OH ODU4 OH
PCS
Input Data
64B/66B PCS Block Format
S Block Payload Y N C Bit Position 0 1 2 Data Block Format D0D1D2D3/D4D5D6D7 01 D0 Control Block Formats Block Type Field C 0C 1C 2C 3/C4C 5C 6C 7 10 0x1E S 0D1D2D3/D4D5D6D7 10 0x78 O0D1D2D3/Z4Z 5Z 6Z 7 10 0x4B T 0C 1C 2C 3/C4C 5C 6C 7 10 0x87 D0T 1C 2C 3/C4C 5C 6C 7 10 0x99 10 0xAA D0D1T 2C 3/C4C 5C 6C 7 D0D1D2T 3/C4C 5C 6C 7 10 0xB4 D0D1D2D3/T4C 5C 6C 7 10 0xCC D0D1D2D3/D4T 5C 6C 7 10 0xD2 D0D1D2D3/D4D5T 6C 7 10 0xE1 D0D1D2D3/D4D5D6T 7 10 0xFF
PMA PMD RS SFD SP VLAN
Physical Media Attachment Physical Media Dependent Reconciliation Sublayer Start Frame Delimiter Skew Point Virtual Local Area Network
PSI for Multiplexing
PSI [0] [1] TS1 [2] TS2 [3]
TSO TSO
PT=0x21 RES Trib Port# Trib Port# … 1 TS Occupied 0 Unallocated 1 Allocated 2 3 4 5 6 7 8 (Bits) Tributary Port# The Tributary Port# indicates the ODUj (j=0, 1, 2, 2e, 3, flex) transported in this TS; Multiple 1.25G TS can be grouped
39 40 41 42 79 80 1 2 39 40 1 2
39 40 41 42
OTU4 111.809974 Gb/s ± 20 ppm PCS Lanes 0 1 2 ... 18 19 0 1 2 ... 18 19 PCS Lanes
OTL Type OTL4.10
OTL Nominal Bit Rate 255/227 x 9.953280 Gb/s = 11.180997 Gb/s 255/227 x 24.883200 Gb/s = 27.952493 Gb/s
VLAN VLAN Type/ (optional) (optional) Length
IEEE Layer Model
Higher Layers (e.g., IP) LLC or other MAC Client MAC Reconciliation CGMII 100GBASE-R PCS
Signal Structure
[255]
S5
S5
S5
… S4 S4 20 PCS lanes in total S4
… 20 PCS lanes in total
PMA service interface
TxB <0> PCS Lane 0 PCS Lane 1
TxB <66> PCS Lane 19
TxB <1254>
PMA service interface
2:1
PMA 20:10 Physical Lanes CAUI SP6 10.3125Gb/s PMA 10:4 PMD Service Interface 0 1 2