5. Optix Osn 6800 Protection Issue1.02 Español

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Course Code
www.huawei.com
Protecciones del OptiX OSN 6800
OptiX OSN 3800/6800/8800 Protection
System Overview... ………………… ..………………………………........Page 03
Confidential Information of Huawei. No Spreading Without Permission
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
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Prólogo
Este curso pretende introducir los principios del mecanismo de protección, rangos de protección, escenarios de aplicación y clasificación de las protecciones de los productos OptiX OSN6800
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Objetivos
Al completar el curso estará en capacidad de:
Explicar los principios de varios tipos de protección aplicados a los productos OptiX OSN 6800
Describir las características de varios tipos de protección y sus escenarios de aplicación
Entender las operaciones relacionadas a las protecciones
Referece
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Contenido
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Contenido
1.1 Protección de Potencia
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PIU
PIU
The system performs distributed power supply and integrated protection upon the secondary power of all units except that of the XCS.
The system control and communication (AUX / 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 all units in every subrack except that of the XCS.
When the system detects a power fault (over voltage or under voltage ) in units other than the XCS, the PBU begins to supply power within 600μs to ensure that the board works normally.
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Protección 1+1 de las SCC & XCS
IU
#16
IU
#15
IU
#14
IU
#13
IU
#12
IU
#11
IU7
IU
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Contenido
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Contenido
2.1 Protección de línea óptica
2.2 Protección 1+1 Intra-Board
3.3 Protección Client 1+1
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Red
La OLP realiza Tx Concurrente y Rx selectiva
La protección OLP se realiza por segmento y usa la ruta diversa entre nodos adyacentes
Usualmente la OLP se usa en topologías de cadena
A
B
C
D
The OLP aims to protect fibers of the line, which adopts the dual feeding and selective receiving function of the OLP board. This kind of protection is performed between two sites segmentally for the optical signal that is multiplexed. This makes that the working path and the protection path of the protected site must adopt the diverse route.
We suppose that the OLP is configured between A and B, B and C, C and D respectively. Then when the fiber between A and B is broken, the OLP switching is triggered only between the A and B. At the same time, the OLP switching is not triggered between the downstream sites: B and C, and C and D. Hence, we think that the OLP protection is performed segmentally.
For the ring networking, as services between sites can be protected through the diverse route of the ring network itself, the OLP is not used.
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OLP
Implementación
El control de protección se realiza por la tarjeta OLP
Tx concurrente: coupler
In this figure, we can see that the OLP board consists of a coupler and an optical switch. The square in this figure represents the coupler, and the circle represents the optical switch.
In the transmit direction of the service, the multiplexed signal is accessed to the coupler from the TI optical interface, dually fed from the coupler to the TO1 and TO2 optical interfaces respectively, and output to the active optical channel through the TO1 and to the standby optical channel through the TO2. In this figure, the line in blue represents the active route, and the line in red the standby route
In the receive direction of the service, two same multiplexed signals are received from the active and standby lines, and output to the corresponding RI1 and RI2 optical input interfaces. Then the optical switch detects the optical power of the two signals from the active and standby channels and controls the protection switching of the active and standby channels based on it.
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OLP
Protección1+1, conmutación en el lado receptor.
Modo de Restauración por defecto: non-reversible.
Tiempo de conmutación de la OLP: menos de 50ms, sin protocolo APS.
Condiciones de activación: POWER_DIFF_OVER, MUT_LOS.
OLP
OLP
A
B
working
protection
After we have an analysis on the OLP switching and recovering, we conclude that the OLP has the following features:
The OLP performs the switching at the receive end, and is defaulted as non-revertible. It can be configured using the NM system.
As the OLP switching does not require the APS protocol, it is simple and reliable. In addition, the design in NG-WDM is optimized, which makes that the switching time is less than 50 ms.
In addition to those features, we need to note that:
The OLP board is required to be configured with the protection group before working. Different protection groups report different PS switching alarms.
NG-WDM provides the OLP and DCP boards. The DCP board is equivalent to two OLP boards, and is aimed to enhance the board integrity. However, for the optical line protection, the DCP is not required to use, as it may affect service in several directions upon the board failure. Hence, the DCP board is mainly applied to the 1+1 protection at the client-side of the OTU instead of the optical line protection.
In the actual application, due to the features of the OLP, it can also be applied to the OTU intra-board 1+1 protection, OTU client-side 1+1 protection as well as the optical line protection. In the next chapters, we will further explain it.
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OLP
Active channel:1dBm
Standby channel:2dBm
Difference 1:
- 1dB
The “active and standby channel difference" refers to the received power difference between the active and standby optical channels. The “active and standby channel difference threshold” refers to the threshold of the received power difference range between the active and standby optical channels.
On the engineering site, the quality and situation of the active and standby optical channels cannot be guaranteed to be totally the same. Some difference is allowed and reasonable. Hence, the NG-WDM provides the initial difference of the active and standby channels that can be set to eliminate the difference of the engineering design. This difference is called “active and standby channel difference threshold”, which can be set using the NM system.
The threshold can be changed from 3 to 8 dB.
Initial power difference be changed from -10 to 10 dB.
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OLP
Resumen
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Red
Protege las tarjetas y las fibras después de la tarjeta OUT por medio de la Tx concurrente y Rx selectiva de la misma tarjeta.
Normalmente utilizada en topologías de anillo que adoptan protección por rutas separadas.
Node
As shown in this figure, services between A and C are dually fed and selectively received on the OTU board. The working service and protection service of this wavelength arrives at the sink site through different routes of the ring network. This can protect services.
As for the ring networking, the OTU intra-board 1+1 protection uses the separated paths in the ring to perform the protection, that is, services are transmitted in both the positive and opposite direction of the ring before arriving at the destination node.
As for the chain networking, it is much similar to the optical line protection explained in chapter one in that the diverse route is required to provide between the adjacent sites. We need to note that in the actual configuration, line fibers of the OTU board that are dually fed are sent to the eastward and westward lines of the node through different equipment types: MUX/DMUX and OA. This process is omitted in this figure.
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Implementación
Solo las OTU proporcionan Tx concurrente y Rx selectiva.
OTUs de 2.5G realizan la conmutación basándose en la detección de SF/SD, en el modo OLP modo, la conmutación se basa en la potencia óptica.
2.5G OTU
For the 2.5G OTU board, two board types are provided currently, for example, the LDGS and the LDGD. The LDGD itself has the function of dual feeding and selective receiving. The working principle is that the board integrates an optical transmit module and a coupler for dual feeding, and two optical receive modules and corresponding O/E conversion circuits for selective receiving at the electrical layer.
For the 5G and 10G OTU, as the space is limited due to the board layout, it cannot integrate the devices for the dual feeding and selective receiving. Hence, for achieving the function of the dual feeding and selective and receiving, the external OLP is required.
As the 2.5G board detects the signal at the electrical layer, it can perform the switching based on the actual situation of services in the active and standby channels, for example, the LOF and BIP8 bit error. And in the OLP mode, whether the switching is trigged is decided by the optical power, that is, the LOS or over low optical power.
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Conmutación & Restauración
Tiempo de conmutación: menos de 50ms, sin protocolo APS.
Modo de restauración por defecto: no-reversible.
2.5G OTU
2.5G OTU
The recovering of the OTU intra-board 1+1 protection switching is defaulted as non-revertible. That is, when the damaged channel recovers, services are not switched over to the original active channel.
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Condiciones de activación
SF condition (default)
SD condition (default)
OTUk_DEGOTUk_EXCODUk_PM_DEGODUk_PM_EXC
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Resumen
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Implementación
The client-side 1+1 protection of the OTU uses the dual feeding and the selective receiving function of the OLP/SCS board to protect the OTU board and units after it.
The client-side 1+1 protection performs the switching based on the client-side ports. And it has the larger extent of protection that other protection types.
We can see from this figure that the client-side 1+1 protection of the OTU actually has two configurations. One does not require using the centralize cross-connection and the other requires using it.
the software can perform the switching at different granularities based on the effect of the fault. When the line fiber is damaged, the switching is performed for the entire board. In this case, it is the same with that of the OTU intra-board 1+1 protection in effect. When the certain channel of client-side fiber is broken, perform the switching on the client-side optical port that is affected
In the master/slave mode, when the active and standby OTUs are in the same subrack, the OLP and SCS can be used; when the active and standby OTUs are not in the same subrack or in the same NE, only the OLP can be used. When the active and standby OTUs are not in the same subrack, the NE software cannot judge the subrack power-off and communication failure between subracks. The former one requires the switching and the latter one does not. Hence, when the OTU is applied in the subrack, it is necessary to use the OLP because this can have the OLP switching triggered when there is no optical signal due to the power-off
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Red
client
signal
working
working
working
working
protection
protection
protection
protection
client
signal
M40
dual-fed
Coupler
Coupler
dual-fed
D40
SCS/OLP/DCP
SCS/OLP/DCP
M
4
0
M
4
0
D40
OTU
OTU
OTU
OTU
M
4
0
M40
OTU
OTU
OTU
OTU
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Conmutación y restauración
La protección OTU client-side 1+1 tiene un tiempo de conmutación menor a 50 ms.
Cuando ocurre una SF en el lado cliente, se activa la conmutación local. Al mismo tiempo, se activa la conmutación “aguas abajo” por los encabezados OTN/SDH. A excepción de esta protección, las otras son de conmutación en un solo extremo y modo no reversible.
TDG
NS2
NS2
TDG
NS2
TDG
TDG
NS2
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Resumen
Alarma
CLIENT_PORT_PS (al usar SCS, SCC reporta, al usar OLP/DCP, OLP/DCP reportan).
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Contenido
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Contenido
3.1 Protección ODUk SNCP
3.2 Protección ODUk SPRing
3.3 Protección SW SNCP
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La granularidad es ODU1 u ODU2.
ODU1 working bus
ODU1 protection bus
The ODUk SNCP protection utilizes the dual fed and selective receiving function of the crossconnections at the electrical layer to protect the line board and OCh fiber. The granularity is ODU1 or ODU2 services.
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Condiciones e activación: Tarjeta fuera de línea, SF/SD.
TQS
In the transmit direction, the client services to be protected are input through the tributary board. They are split into working signals and protection signals after passing through the XCS board or mess cross-connections. The working signals and the protection signals are respectively transmitted in the working channel and the protection channel.
In the receive direction, in normal cases, only the cross connection corresponding to the working line board is enabled and that to the protection line board is disconnected. When the working channel is faulty, the cross connection corresponding to the working line board is disconnected and that to the protection line board is enabled. The service signals are transmitted in the protection channel.
After the working channel returns to normal, the service signals can be switched back to the cross connection corresponding to the given line board according to the existing configuration in the NM system.
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SNC/I (Monitoreo propio): la condición de activación depende de SF/SD.
SNC/S (Monitoreo de sub capa): la condición de activación depende de las secciones SM y TCM.
SNC/N (Monitoreo no intrusivo): la condición de activación depende de las secciones SM, TCM o PM.
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Protocolo APS
No necesario
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The ODUk SPRing protection mainly applies to the ring network with distributed services. This protection uses two different wavelengths to achieve the protection of multiple distributed services between all stations.
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En una protección SPRing, debe haber un nodo administrativo.
After the ODUk SPRing protection is configured at a general node, the passthrough crossconnection of the protection channel is automatically generated
If all protection channels of the ring network are passthrough cross-connections, their performance cannot be accurately detected. In this case, the protection fails.
Hence, a management node must be specified. After the management node is specified, the system automatically deletes the bidirectional cross-connection between the east and west protection channels of the protection group that corresponds to the management node. In the mean time, the system tri-fed one of the add/drop services at the node. One of the three channels of trisected services is fed to the normal working channel; the other two of the three channels of trisected services are respectively broadcasted to the west and east protection channels.
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Tiempo de conmutación: menor a 50 ms.
Condición de activación: SF/SD.
In the transmit direction: The client services to be protected are input through the tributary board, cross-connected to the east working line board, and then dually fed to the east and west protection line boards. In this way, the working signals and protection signals are separated. After that, the working signals and protection signals are respectively transmitted over the working and protection channels.
In the receive direction, when the operating is normal, only the cross-connection of the working channel is enabled; that of the protection channel is disabled. When the working channel is faulty, disconnect the cross-connection of the working channel at the receive end. Hence, the cross-connection of the protection channel that corresponds to the west line board is available, and the services are operating in the protection channel.
When the working channel is restored, because the protection is revertive, the service signals are switched back the cross-connection that corresponds to the originally specified line board.
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Condición de activación
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The same OTU card
Working XCS
Standby XCS
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Condiciones e activación: Tarjeta fuera de línea, SF/SD.
GE working bus
GE protection bus
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Comparación
Intra-board protection
Tarjeta OTU capa óptica
Protege la línea y fallas internas de fibra, bajo costo, para OTU 5/10G necesita OLP externa
Client side 1+1
Lado cliente, capa óptica de la OTU
Extiende la protección al lado cliente y tiene el rango más amplio de protección
ODUk SNCP
Protege la línea y la LU, soporta SNC/I, SNC/S, SNC/N.
ODUk SPRing
Topología en anillo, servicios distribuidos, comparte el canal de protección, necesita protocolo.
SW-SNCP
50ms
Thank you

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5. Optix Osn 6800 Protection Issue1.02 Español