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Huawei OptiX OSN 6800. Product Overview - part 3

OptiX OSN 6800 Intelligent Optical Transport Platform

Product Overview

3 Functions and Features

If the boards support centralized and distributed cross-connections, and they are housed in

paired slots, use distributed grooming with precedence.

3.2.1 Integrated Grooming

The OptiX OSN 6800 implements integrated grooming using cross-connect boards. As shown

in Figure 3-1, when an XCS board is in the subrack, the XCS board can realize full cross

connection among the 14 slots of IU1-IU8 and IU11-IU16.

The OptiX OSN 6800 supports integrated grooming of GE services, 10GE services, ODU1

signals or ODU2 signals by the XCS board:

 It supports a maximum of 180 Gbit/s cross grooming capacity of GE services.

 It supports a maximum of 360 Gbit/s cross grooming capacity of 10GE services.

 It supports a maximum of 360 Gbit/s cross-connect capacity of ODU1 signals.

 It supports a maximum of 360 Gbit/s cross-connect capacity of ODU2 signals.

Figure 3-1 Slots in the OptiX OSN 6800

Table 3-3 lists the services supported by the OTU board integrated grooming.

Table 3-3 Services supported by the OTU board integrated grooming

Board

Integrated Grooming

TN11ECOM

GE services

TN11LOG

GE services

TN12LOG

TN11L4G

GE services

TN11LDGS

GE services

TN11LDGD

LEM24

10GE services

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OptiX OSN 6800 Intelligent Optical Transport

Platform

Product Overview

3 Functions and Features

Board

Integrated Grooming

LEX4

10GE services

TN13LQM

GE services

TN11LQMD

GE services

TN11LQMS

TN12LQMD

GE services

TN12LQMS

TN11LQG

GE services

TN11ND2

ODU1 signals

TN12ND2

ODU2 signals

TN52ND2

ODU2e signals

TN53ND2

TN51NQ2

ODU1 signals

TN52NQ2

ODU2 signals

TN53NQ2

ODU2e signals

TN11NS2

ODU1 signals

TN12NS2

ODU1 signals

TN52NS2

ODU2 signals

TN53NS2

ODU2e signals

TN11NS3

ODU2 signals

TN52NS3

ODU2e signals

TN11TBE

GE services

TN11TDG

GE services

ODU1 signals

TN11TDX

ODU1 signals

TN12TDX

ODU2 signals

TN52TDX

ODU2e signals

TN53TDX

TN11TQS

ODU1 signals

TN11TQM

ODU1 signals

TN12TQM

ODU1 signals

TN11TQX

ODU2 signals

TN52TQX

ODU2e signals

TN55TQX

TN11TOM

GE services

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OptiX OSN 6800 Intelligent Optical Transport Platform

Product Overview

3 Functions and Features

Board

Integrated Grooming

ODU1 signals

TN52TOM

ODU1 signals

TN52TOG

ODU1 signals

TN11TSXL

ODU2 signals

ODU3 signals

3.2.2 Distributed Grooming

The OptiX OSN 6800 implements distributed grooming based on buses between paired slots.

Therefore, distributed cross-connections are also referred as paired cross-connections.

The OptiX OSN 6800 supports seven pair slots: IU1 and IU2, IU3 and IU4, IU5 and IU6, IU7

and IU8, IU11 and IU12, IU13 and IU14, IU15 and IU16. The paired slots support distributed

grooming except IU9 and IU10 which is shown in Table 3-4.

Table 3-4 lists the distributed grooming supported by the OTU.

Table 3-4 Services supported by the OTU board distributed grooming.

Board

Distributed Grooming

TN11ECOM

GE services

TN11LOG

GE services

TN12LOG

TN11L4G

GE services

TN11LDGS

GE services

TN11LDGD

TN11LQG

GE services

TN13LQM

GE services

Any services

TN11LQMS

GE services

TN11LQMD

Any services

TN12LQMS

GE services

TN12LQMD

Any services

TN11NS2

ODU1 signals

TN11TBE

GE services

TN11TDG

GE services

ODU1 signals

TN11TDX

ODU1 signals

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OptiX OSN 6800 Intelligent Optical Transport Platform

Product Overview

3 Functions and Features

Board

Distributed Grooming

TN11TQS

ODU1 signals

TN11TQM

GE services

ODU1 signals

Any services

TN12TQM

GE services

ODU1 signals

Any services

TN11TOM

GE services

ODU1 signals

Any services

TN52TOM

GE services

Any services

3.2.3 Application Scenario

The following three typical applications are supported by electrical grooming.

 Passing through on the client side: The services are input from a client-side port of the

local station and are output through another client-side port. The services are not

transmitted through the fiber line.

 Adding and dropping on the client side: The services of the other stations are transmitted

through the fiber to a WDM-side port of the local station, and are output through a

client-side port, or the client services are input from the local station and are transmitted

to the other station through the fiber.

 Passing through on the line side: The services are not added or dropped at the local

station. The local station functions as a regeneration station and sends the services from

one side of the fiber line to the other side.

The application of electrical layer grooming is shown in Figure 3-2.

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OptiX OSN 6800 Intelligent Optical Transport Platform

Product Overview

3 Functions and Features

Figure 3-2 Application of electrical layer grooming

ND2

NQ2

MUX/

DMUX

ND2

MUX/

ND2

Cross-Connect

DMUX

Unit

ND2

NS3

:Adding and dropping on the client side

:Passing through on the client side

:Passing through on the line side

3.3 Optical Layer Grooming

Distribution solutions of medium wavelength resource of WDM equipment are as follows:

 Fixed optical add/drop multiplexer (FOADM)

 Reconfigurable optical add/drop multiplexer (ROADM)

The FOADM solution cannot adjust the distribution of wavelength resource according to the

service development.

The ROADM solution realizes reconfiguration of wavelengths by blocking or

cross-connecting of wavelengths. This ensures that the static distribution of the wavelength

resource is flexible and dynamic. ROADM with U2000 can remotely and dynamically adjust

the status of wavelength adding/dropping and passing through. A maximum of 80

wavelengths can be adjusted.

In the case where one link, fiber or dimension fails in the ROADM solution, other links, fibers

and dimensions remain unaffected. This is attributed to three factors: gain locking of optical

amplifiers, service separation and wavelength blocking of the ROADM solution.

The ROADM solution has the following advantages:

3.4 Transmission System

3.4.1 40 Gbit/s

The OptiX OSN 6800 provides a 40/80 x 40 Gbit/s transmission solution.



40 Gbit/s non-coherent transmission solution

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OptiX OSN 6800 Intelligent Optical Transport Platform

Product Overview

3 Functions and Features

Figure 3-3 shows the a typical application of the 40 Gbit/s non-coherent transmission

solution.

Figure 3-3 Typical application of the 40 Gbit/s transmission solution

40/80x40 Gbit/s

OTU

DCM

Client

services

ODU2/ODU1

T: Tributary boards

N: Line boards



40 Gbit/s inverse multiplexing solution

In an OptiX OSN 6800 system, 40 Gbit/s services can be transmitted over a 10 Gbit/s

network, as shown in Figure 3-4.

Figure 3-4 Transmission of 40 Gbit/s services over a 10 Gbit/s network

ODU2

10 Gbit/s

40 Gbit/s

3.4.2 10 Gbit/s, 40 Gbit/s, 100 Gbit/s Hybrid Transmission

With the emergence of service requirements, the existing 10 Gbit/s WDM transmission

system may be gradually upgraded to the 40 Gbit/s transmission system. When this occurs,

the hybrid transmission of the 40 Gbit/s and 10 Gbit/s signals becomes very important.

The OptiX OSN 6800 supports hybrid transmission of 10 Gbit/s signals, 40 Gbit/s

non-coherent signals, 40 Gbit/s coherent signals, and 100 Gbit/s coherent signals, and any of

their combinations. Thanks to this feature, the incumbent networks can be upgraded to ones

with larger capacity based on proper system designs of system performance parameters,

protecting operators' investments while addressing the increasing bandwidth demands. Figure

3-5 shows hybrid transmission of 100 Gbit/s, 40 Gbit/s, and 10 Gbit/s signals.

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OptiX OSN 6800 Intelligent Optical Transport Platform

Product Overview

3 Functions and Features

Figure 3-5 Hybrid transmission of 40 Gbit/s and 10 Gbit/s signals in the non-coherent system

10 Gbit/s

OTU

DCM

Client

services

40 Gbit/s

OTU

40 Gbit/s

T: Tributary boards

N: Line boards

3.4.3 Transmission Distance

 For 40 Gbit/s rate in 40-wavelength system, supports a maximum of 20 x 22 dB

transmission without electrical regenerator.

 For 40 Gbit/s rate in 80-wavelength system, supports a maximum of 18 x 22 dB

transmission without electrical regenerator.

 For 10 Gbit/s rate in 40-wavelength system, supports a maximum of 32 x 22 dB

transmission without electrical regenerator.

 For 10 Gbit/s rate in 80-wavelength system, supports a maximum of 25 x 22 dB

transmission without electrical regenerator.

 For 2.5 Gbit/s rate, supports a maximum of 25 x 22 dB transmission without electrical

regenerator.

 For 10 Gbit/s rate system, supports a maximum of 1 x 82 dB single-span ultra

long-distance transmission.

 For CWDM systems, supports a maximum of 80 km transmission distance.

Huawei OSN series WDM equipment supports various links or spans based on different

modulation schemes for systems with diversified channel spacing.

Table 3-5 2.5 Gbit/s system span

Channel Spacing

Modulation Scheme

22 dB Span

100 GHz

NRZ

25 x 22 dB

Table 3-6 10 Gbit/s system span

Channel Spacing

Modulation Scheme

22 dB Span

100 GHz

DRZ

32 x 22 dB

NRZ

27 x 22 dB

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OptiX OSN 6800 Intelligent Optical Transport Platform

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Channel Spacing

Modulation Scheme

22 dB Span

NRZ (XFP)

27 x 22 dB

50 GHz

DRZ

25 x 22 dB

NRZ

22 x 22 dB

NRZ (XFP)

22 x 22 dB

Table 3-7 40 Gbit/s system span

Channel Spacing

Modulation Scheme

22 dB Span

100 GHz

DQPSK

20 x 22 dB

50 GHz

ODB

8 x 22 dB

DQPSK

18 x 22 dB

3.5 Protection

The OptiX OSN 6800 provides various types of equipment-level protection and network-level

protection.

3.5.1 Equipment Level Protection

The OptiX OSN 6800 provides cross-connect board 1+1 protection, inter-subrack

communication protection, SCC board 1+1 protection, DC input protection, redundancy

protection for fans and centralized power protection.

Cross-Connect Board 1+1 Protection

The XCS adopts 1+1 backup.

Service boards receive signals and process overheads. Then, the boards transmit the signals to

the active and the standby XCSs. The active and the standby XCSs send the data after

cross-connection to service boards. Service boards select the data from the XCSs.

Configuration of the active XCS is the same as the configuration of the standby XCS. The two

boards are independent of each other. Forcible switching can be performed between the two

XCS boards without affecting the existing services.

The cross matrix of the active XCS is the same the cross matrix of the standby XCS. When

the standby XCS receives information about abnormal active XCS or when the NM system

issues a switching command, the standby XCS takes over the work from the active XCS, sets

itself to be in working status, and reports a switching event.

There are two types of switching for the 1+1 protection switching of XCSs:

 Automatic switching

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When the service boards detect the abnormal status of XCSs or buses, a switching is

performed. The switching does not need to be performed manually.

 Manual switching

When a switching is required in a test during the normal running of the active and the

standby XCSs, the switching can be performed manually.

When a switching occurs between the cross-connect boards, a switching also occurs between the clock

boards.

SCC Board 1+1 Protection

The SCC adopts 1+1 backup.

The service boards receive signals and process overheads. Then, the boards transmit the

overheads to both the active and the standby SCCs. The active and the standby SCCs send the

data after overhead processing to service boards. The service boards select the data according

to the status of SCCs. Configuration of the active SCC is the same as the configuration of the

standby SCC. The two boards are independent of each other.

The communication between SCCs and other boards is performed mainly through Ethernet.

When the status is normal, the data on service boards and the standby SCC is from the active

SCC. There is no inter-board communication between the standby SCC and service boards.

Only when the standby SCC is in the working mode, it has inter-board communication with

other boards.

When the active SCC is in normal status, the standby SCC is in backup status. When the

standby SCC receives information about abnormal active SCC or when the NM system issues

a switching command, the standby SCC takes over the work from the active SCC, sets itself

to be in working status, and reports a switching event.

There are two types of switching for the 1+1 protection switching of SCCs:

 Automatic switching

The SCC detects its own status through hardware or software. If it is in the abnormal

status, a switching is performed automatically. The switching is performed by the board

and no manual operation is required.

 Manual switching

When a switching is required in a test during the normal running of the active and the

standby SCCs, the switching can be performed manually.

DC Input Protection

The power supply system supports two -48 V/-60V DC power inputs for mutual backup.

Therefore, the equipment remains normal when any of the two DC inputs is faulty.

Centralized Power Protection

The system performs distributed power supply and integrated protection on the secondary

power of the optical boards in the main optical path.

The system control and communication (SCC) board contains power backup unit (PBU) and

can provide 1:N power backup for the system. The system uses the SCC board to provide

integrated power protection and secondary power backup upon the +3.3 V power supply of

the optical boards in the main optical path in every subrack.

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OptiX OSN 6800 Intelligent Optical Transport Platform

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When the system detects a power fault (overvoltage or undervoltage) in the optical boards in

the main optical path, the PBU begins to supply power within 600μs to ensure that the board

works normally.

 The PBU supports power supply switching of one board. The working power supply is off

when there is overvoltage and switches to the PBU. The working power supply remains on

when there is undervoltage and switches to the PBU.

 When a board with a faulty power module is inserted in the system, it obtains power

supply from the PBU and affects the normal working of the board that is protected by the

PBU. Therefore, ensure that the board inserted in the system has a normal power module.

Redundancy Protection for Fans

In the OptiX OSN 6800 system, each subrack is divided into five partitions in terms of heat

dissipation. The speed of fans in each partition is regulated independently. When one of the

fans is faulty, the other fan in the partition runs at its full speeds.

Inter-Subrack Communication Protection

Subracks of an NE can be cascaded in various modes. When subracks are cascaded to form a

ring, the NE provides working and protection Ethernet communication channels for

communication between the master and slave subracks. In this case, when the working

channel is faulty, services are switched to the protection channel, achieving protection for

inter-subrack communication.

3.5.2 Network Level Protection

The OptiX OSN 6800 protects a network in the following ways:

 Optical line protection system

 Optical channel protection

− Intra-board 1+1 protection

− Client-side 1+1 protection

 Subnetwork connection protection (SNCP)

− Sub-wavelength SNCP (SW SNCP)

− ODUk SNCP

− VLAN SNCP

− Tributary SNCP

− Master Slave SNCP (MS SNCP)

 ODUk SPRing protection

 Optical wavelength shared protection (OWSP)

 Ethernet protection

− Board-level protection

− Ethernet ring protection (ERPS)

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− Link aggregation group (LAG)

− Distributed link aggregation group (DLAG)

− Distribute board protect system (DBPS)

− Spanning tree protocol (STP) or rapid spanning tree protocol (RSTP)

− Multiple spanning tree protocol (MSTP)

− Link state pass through (LPT)

The security and survivability of a network can be further enhanced through an automatic

switched optical network (ASON), which is generally referred to as intelligent optical

network.

As a main networking mode of ASON, mesh features high flexibility and scalability. On a

mesh network, to make the interrupted services available, you can immediately restore the

services through the rerouting mechanism in addition to the traditional protection scheme

such as 1+1 protection and shared protection scheme such as ODUk SPRing. That is, the

mesh network can support traditional protection schemes, dynamic restoration of services, and

service restoration mechanisms in case of protection failures. In this manner, services are not

interrupted if the resources are available.

The network level protection classifications are listed in Table 3-8.

Table 3-8 Service protection classifications