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HUAWEI OptiX OSN 8800 T64/T32 Intelligent Optical Transport Platform. Product Description - part 33

Figure 7-63 Model of the protection for electrical-layer ASON services

Electrical-Layer Diamond (ODUk SNCP Protection)

Line Unit

Tributary Unit

ROADM

Line Unit

7.7.2 Quick Finding of Optical-Layer and Electrical-Layer Functions

The functions of optical-layer and electrical-layer services implemented by the ASON software

are different.

The WDM ASON features support the optical-layer ASON function and the electrical-layer

ASON function, as described in Table 7-26.

Table 7-26 Optical-layer ASON and electrical-layer ASON

Item

Optical-Layer ASON

Electrical-Layer ASON

Control channel

D4-D12 bytes of the optical

RES or SM_TTI and

supervisory channel (OSC)

PM_TTI bytes of the OTN

in outband manner.

overhead.

The system uses RES bytes

by default.

Supported service type

Services of OCh wavelength

Services of ODUk

level .

wavelength level (k=0, 1, 2,

3).

Supported SLA

Silver and copper.

Diamond, silver, and copper.

Hardware configuration

FIU board, SC1/2 board, and

Cross-connect boards and

requirements

WSS board.

relevant tributary boards.

Rerouting trigger conditions

Optical-layer SF alarm. For

Electrical-layer SF and SD

detailed information refer to

alarms. For detailed

Rerouting of an LSP.

information refer to

Rerouting of an LSP.

Rerouting mechanism

After a service is interrupted,

rerouting is initiated on the

a new service is created

source node, and a new trail

through cross-connections

is created through ROADM

on the centralized cross-

cross-connections.

connect board or tributary

board.

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Item

Optical-Layer ASON

Electrical-Layer ASON

Special technology

Wavelength tunable

rerouting, which solves the

wavelength blocking

problem in rerouting.

Table 7-27 lists the functions of optical-layer ASON services of different SLAs.

Table 7-27 Functions of optical-layer ASON services of different SLAs

Item

Silver Service

Copper Service

Protection and restoration

Restoration

No protection

policy

No restoration

Technologies for

Rerouting

implementation

Technical implementation

Real-time computation

without presetting protection

channels

Bandwidth utilization

High

Excessively high

Supported

Route pre-

Supported

functions

computation

Route

Supported

optimization

and service

reversion

Conversion

Supported

between

traditional and

ASON services

Switching

between

services of

different SLAs

Pre-set

Supported

restoration trail

Service

Supported

association

Wavelength

Supported

tunable

rerouting

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Item

Silver Service

Copper Service

Optical

Supported

parameters

Table 7-28 lists the functions of electrical-layer ASON services of different SLAs.

Table 7-28 Functions of electrical-layer ASON services of different SLAs

Item

Diamond Service

Silver Service

Copper Service

Protection and

Restoration

No protection

restoration policy

restoration

No restoration

Technologies for

ODUk SNCP and

Rerouting

implementation

rerouting

Technical

Protection always

Real-time

implementation

provided when the

computation without

network bandwidth

presetting protection

is available

channels

Bandwidth utilization

Low

High

Excessively high

Support

Routing

Supported

pre-

function

computatio

Route

Supported

optimizatio

n and

service

reversion

Conversio

Supported

n between

traditional

and ASON

services

Switching

Supported

between

services of

different

SLAs

Pre-set

Supported

restoration

trail

Service

Supported

association

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Item

Diamond Service

Silver Service

Copper Service

Wavelengt

h tunable

rerouting

Optical

parameters

7.7.3 Prerequisites for Enabling ASON Features

Certain hardware and software prerequisites must be available when the optical-layer and

electrical-layer ASON features are enabled.

The prerequisites for enabling the optical-layer ASON features are as follows:

l The OSC board must be configured.

l The FIU board must be configured.

l The WSS board must be configured.

l It is required to configure two SCC boards in the master subrack.

The prerequisites for enabling the electrical-layer ASON features are as follows:

l The centralized cross-connect board must be configured.

l It is required to configure two SCC boards in the master subrack.

The software prerequisites for enabling ASON features are as follows:

l The NE software version must support the ASON features. Contact Huawei engineers to

determine whether the current NE software version supports the ASON features.

l The version of the mapping NMS that is delivered must support the ASON features.

l The ASON features are controlled by the license on the NMS. The ASON features can be

enabled for only users who apply for and purchase this license or obtain a special permission

from Huawei.

NOTE

There are two types of license: the license for basic ASON features and the license for enabling services.

The first type of license is used to control the ASON features of a single station. The second type of license

is specific for the services on the entire network and is used to control the number of services of different

rates on an ASON network.

NOTE

l 2.5G and 5G boards do not support optical-layer ASON services.

l Individual tributary boards do not support optical-layer ASON services on their client sides.

7.7.4 Conditions for Configuring ASON Services

Certain configuration conditions must be met to ensure successful creation of the optical-layer

and electrical-layer ASON services.

NOTE

The optical power of each channel of an ASON NE must be controlled by the software, and thus an EVOA

must be configured inside the ASON NE.

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Configuring Electrical-Layer ASON Services

In the case of electrical-layer ASON services, a centralized cross-connect board must be used

to groom sub-wavelength services. In the case of a site where the main and slave subracks are

configured, electrical-layer cross-connections cannot be groomed between subracks (between

the master and slave subracks and between slave subracks). Hence, the working trail and

protection trail (or restoration trail) of the electrical-layer services must be led out from the site

through the same subrack. See Figure 7-64.

Figure 7-64 Configuring electrical-layer ASON services

Tributary

Working

Cross-Connect

Protection

Retrieve

board

Configuring Optical-Layer ASON Services

The process of configuring the optical-layer ASON services is more complex than the process

of configuring the electrical-layer ASON services.

The optical-layer ASON services are dynamic, and their restoration routes are not fixed.

Therefore, the reconfigurable optical add/drop multiplexer (ROADM) board should be

configured.

l One pair of WSS boards should be configured for each dimension.

l In the case of silver services, one pair of WSS boards should be configured at each

wavelength add/drop node.

l In the case of permanent 1+1 diamond service and rerouting 1+1 diamond service, two

pairs of WSS boards should be configured at each wavelength add/drop node (one pair is

for the working channel, and the other pair is for the protection channel).

The ASON protocol is embedded in the OSC overheads. Hence, the OSC board must be

configured.

Figure 7-65, which is the diagram for configuring the optical-layer ASON services, shows the

number of WSS boards required by the sliver services. If the services are diamond services with

the rerouting function, a pair of WSS boards (a pair of working boards and a pair of protection

boards) must be configured at points where the services are added and dropped.

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Figure 7-65 Configuring optical-layer ASON services

Does not

support

OTU

reroute

MR4

WSD9

RMU9

FIU

RMU9

WSD9

RMU9

OSC

Protection

MR4

Support

trail

Working

reroute

trail

OTU

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Operation, Administration, and

Maintenance

About This Chapter

8.1 Automatic Deployment Commissioning

The system supports automatic deployment commissioning. This automatic deployment

commissioning function implements automatic commissioning of a new network, optical power

commissioning of an expanded network or in the case of rerouting, real-time optimization of

network performance, and fiber connection test. In the deployment phase, the automatic

deployment commissioning function can be used to adjust the optical power for the main optical

paths and implement performance adjustment for the entire network. This can solve the

performance degradation problem caused by wavelength grooming, aged optical paths, or

artificial factors in the maintenance phase.

8.2 End-to-End Service Configuration

The system provides end-to-end OTN service configurations management function, which helps

simplify the configuration process. This function helps shorten the network deployment time

and implement automatic management of a network.

8.3 Supervision and Administration Module

The system control and communication (SCC) board monitors and manages the system NE.

8.4 Communication and Maintenance Interfaces

The system provides abundant interfaces for data communication and equipment maintenance.

8.5 Orderwire Function

The orderwire provides voice communication for the operation engineers or maintenance

engineers at different stations.

8.6 Security Management

The NMS uses many schemes to manage the security of the OptiX OSN 8800/6800/3800 NE.

8.7 Master-Slave Subrack Management

The OptiX OSN 8800 supports master-slave subrack management. When multiple subracks are

required on one NE, the master-slave subrack mode should be used for unified management of

these subracks. In this manner, the IP resources can be saved. In addition, when optical-layer

ASON and optical-layer services are configured on the NE, the optical subracks on the NE should

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be taken out to form a new NE for management. This facilitates the maintenance and reduces

the management cost.

8.8 Administration and Maintenance

The design of the cabinet and boards and the configuration of the system incorporate the

requirements with easy and effective operation, administration, and maintenance of the

equipment.

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8.1 Automatic Deployment Commissioning

The system supports automatic deployment commissioning. This automatic deployment

commissioning function implements automatic commissioning of a new network, optical power

commissioning of an expanded network or in the case of rerouting, real-time optimization of

network performance, and fiber connection test. In the deployment phase, the automatic

deployment commissioning function can be used to adjust the optical power for the main optical

paths and implement performance adjustment for the entire network. This can solve the

performance degradation problem caused by wavelength grooming, aged optical paths, or

artificial factors in the maintenance phase.

This automatic deployment commissioning implements the function as follows:

l Supports fiber connection tests.

l Supports automatic commissioning of a new network, including commissioning of main

optical paths and adjusting of channel flatness.

l Supports optical power commissioning in a scenario in which a site is expanded or

wavelengths are added or removed.

l Supports commissioning of an ASON network, including pre-commissioning of planned

trails and optimization of the optical power after rerouting occurs.

l Supports optimization of O&M performance of a network, including the control of optical

spectral flatness when the wavelength optical power on a channel fluctuates and

optimization commissioning based on service performance.

l Provides detailed information in a report which provides detailed information about boards,

optical power, and BER on the basis of a network or link. This facilitates the maintenance

personnel to understand the running conditions of the network running.

8.2 End-to-End Service Configuration

The system provides end-to-end OTN service configurations management function, which helps

simplify the configuration process. This function helps shorten the network deployment time

and implement automatic management of a network.

When configuring an end-to-end OTN service, you can create a service trail that traverses

different layers and directly create a client service trail. You do not need to know how the service

grooming between the OTN layers is implemented or create an ODU0/ODU1/ODU2/ODU3

server trail at each layer. After you create a client service, the client service trails at different

OTN layers are generated automatically. This simplifies the service configuration process.

The end-to-end OTN service configuration includes creating, querying, deleting, and modifying

an end-to-end service and optimizing an end-to-end service. The latter is also known as service

defragmentation.

8.3 Supervision and Administration Module

The system control and communication (SCC) board monitors and manages the system NE.

The SCC board collects the state information, alarm events, and performance parameters from

the functional modules of each board.

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Then, the SCC converts, processes, and stores the information and parameters. At the same time,

it sends the control and administration information to the other functional modules.

The SCC provides functional interfaces to facilitate the communication between the functional

modules of each board and the NM, as shown in Table 8-1.

Table 8-1 Description of the functional interfaces of the SCC

Functional

Description

Interface

F&fa

Connect the RS-232 interface to a PC or a workstation for

commissioning.

Etherneta

TMN interface, local NE management interface, and internal

communication interface, used for commissioning

OAMa

The operation, administration, and maintenance interface.

The X.25 interface is provided to communicate with the terminal

through the public packet switched network.

DCC communication

Provides the data communication channel (DCC) of the supervisory

link.

Communication

Communicates with other boards, collects performance data, and

module

delivers the configuration.

Network management communication interface.

a: The interface functions of the SCC have corresponding external physical interfaces in the

subrack interface area on the EFI1 and EFI2. For details, see the Hardware Description.

The SCC monitors the running status of the boards on the NE.

The main monitoring parameters include:

l Input optical power

l Output optical power

l Laser temperature

l B1 performance parameter

l FEC performance parameter

8.4 Communication and Maintenance Interfaces

The system provides abundant interfaces for data communication and equipment maintenance.

The EFI1, EFI2, STI and ATE boards implement functions, such as clock signal input and output,

alarm input, alarm output, and alarm cascading, to monitor the remote external systems. Table

8-2 shows the interface functions of the STI, EFI, and ATE.

The AUX board provides the inter-board and inter-subrack communication. The AUX board

does not provide external interfaces but only four indicators.

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Table 8-2 Interface function of STI, EFI, and ATE

Front Panel Appearance

Panel

Interface

Usage

Interface

Type

ALMO1

RJ-45

The definitions for the pins of

ATE

the ALM01 and ALM02

ALMO2

interfaces are the same. The

ALMO3

two interfaces are used for

ALMO4

output and cascading,

respectively. The definitions

for the pins of the ALM03

and ALM04 interfaces are the

same. The two interfaces are

used for output and

cascading, respectively.

Alarm outputs are sent to the

DC power distribution

cabinet through the output

interface and the cascading

interface. You can configure

it to be the other outputs to

realize integrated display of

alarms. The OptiX OSN 8800

provides eight alarm outputs.

Defaults of the first three are

critical alarm, major alarm,

and minor alarm. The other

five are reserved. Alarm

outputs can be cascaded.

ALMI1

RJ-45

External alarm signal input

function is designed for

ALMI2

requirements when the alarm

signals of the external

systems (such as the

environment monitory) need

remote monitoring.

The OptiX OSN 8800

provides eight alarm inputs.

The name of the eight alarms

can be configured to

cooperate with the external

system to realize remote

monitoring of external

alarms.

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