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Protecciones del OptiX OSN 6800
OptiX OSN 3800/6800/8800 Protection
OptiX OSN 3800/6800/8800 Protection
System Overview... ………………… ..………………………………........Page 03
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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
OptiX OSN 3800/6800/8800 Protection
OptiX OSN 3800/6800/8800 Protection
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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
OptiX OSN 3800/6800/8800 Protection
OptiX OSN 3800/6800/8800 Protection
Referece
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Contenido
OptiX OSN 3800/6800/8800 Protection
OptiX OSN 3800/6800/8800 Protection
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Contenido
1.1 Protección de Potencia
OptiX OSN 3800/6800/8800 Protection
OptiX OSN 3800/6800/8800 Protection
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PIU
PIU
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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
OptiX OSN 3800/6800/8800 Protection
OptiX OSN 3800/6800/8800 Protection
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Contenido
2.1 Protección de línea óptica
2.2 Protección 1+1 Intra-Board
3.3 Protección Client 1+1
OptiX OSN 3800/6800/8800 Protection
OptiX OSN 3800/6800/8800 Protection
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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
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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
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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
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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
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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
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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
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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
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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
OptiX OSN 3800/6800/8800 Protection
OptiX OSN 3800/6800/8800 Protection
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Implementación
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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).
OptiX OSN 3800/6800/8800 Protection
OptiX OSN 3800/6800/8800 Protection
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Contenido
OptiX OSN 3800/6800/8800 Protection
OptiX OSN 3800/6800/8800 Protection
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Contenido
3.1 Protección ODUk SNCP
3.2 Protección ODUk SPRing
3.3 Protección SW SNCP
OptiX OSN 3800/6800/8800 Protection
OptiX OSN 3800/6800/8800 Protection
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La granularidad es ODU1 u ODU2.
ODU1 working bus
ODU1 protection bus
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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
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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.
OptiX OSN 3800/6800/8800 Protection
OptiX OSN 3800/6800/8800 Protection
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Protocolo APS
No necesario
OptiX OSN 3800/6800/8800 Protection
OptiX OSN 3800/6800/8800 Protection
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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.
OptiX OSN 3800/6800/8800 Protection
OptiX OSN 3800/6800/8800 Protection
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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.
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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
OptiX OSN 3800/6800/8800 Protection
OptiX OSN 3800/6800/8800 Protection
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