CN214675520U - Optical line protection devices and optical line network transmission equipment - Google Patents
Optical line protection devices and optical line network transmission equipment Download PDFInfo
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- CN214675520U CN214675520U CN202121198984.0U CN202121198984U CN214675520U CN 214675520 U CN214675520 U CN 214675520U CN 202121198984 U CN202121198984 U CN 202121198984U CN 214675520 U CN214675520 U CN 214675520U
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Abstract
本申请提供一种光线路保护装置和光线路网络传送设备。该光线路保护装置包括控制器、分光器、光纤测试仪、光开关、光滤波器、第一外线接口和第二外线接口；光开关包括第一端子、第二端子、第三端子和第四端子，第一端子和第二端子分别与光滤波器连接，第三端子与分光器的第一端连接，第四端子与第二外线接口连接；分光器的第二端与第一外线接口连接，分光器的第三端与光纤测试仪的第一端连接；控制器的第一端与光纤测试仪的第二端连接，控制器的第二端与光开关连接，通过光纤测试仪检测到的光功率信号控制光开关的切换，以实现第一外线接口和第二外线接口传输方向的倒换。
The present application provides an optical line protection device and an optical line network transmission device. The optical line protection device includes a controller, an optical splitter, an optical fiber tester, an optical switch, an optical filter, a first external line interface and a second external line interface; the optical switch includes a first terminal, a second terminal, a third terminal and a fourth terminal Terminals, the first terminal and the second terminal are respectively connected with the optical filter, the third terminal is connected with the first end of the optical splitter, the fourth terminal is connected with the second external line interface; the second end of the optical splitter is connected with the first external line interface , the third end of the optical splitter is connected to the first end of the optical fiber tester; the first end of the controller is connected to the second end of the optical fiber tester, and the second end of the controller is connected to the optical switch. The optical power signal of the optical switch controls the switching of the optical switch, so as to realize the switching of the transmission direction of the first outside line interface and the second outside line interface.
Description
Technical Field
The present application relates to the field of communications devices, and in particular, to an optical line protection device and an optical line network transmission device.
Background
The optical Wavelength Division Multiplexing (WDM) is a technique in which a series of optical carriers carrying information are transmitted along a single optical fiber at Wavelength intervals of 1 to several hundred nanometers in an optical frequency domain; and a certain method is used at a receiving end to separate the optical carriers with different wavelengths. The optical wavelength division multiplexing technology can save a large amount of optical fiber resources, and is widely applied to long-distance backbone optical networks and metropolitan area optical networks.
In the prior art, when a single-core optical fiber adopting an optical wavelength division multiplexing technology forms an optical transmission network, an optical multiplexer/demultiplexer is generally used at a local end and a far end respectively, the optical multiplexer/demultiplexer completes the multiplexing and demultiplexing of optical signals with different wavelengths, a line side interface of the optical multiplexer/demultiplexer is connected through a line optical fiber, and a branch side interface of the optical multiplexer/demultiplexer is connected with an optical module inserted on client equipment through an optical fiber jumper so as to realize the communication function of the optical transmission network.
However, in the optical fiber chain type optical wavelength division transmission network in the prior art, when there is a second routing optical cable in the same direction, the OLP can be implemented, and when there is no second routing optical cable in the same direction, the optical transmission network has no optical line protection function, so as long as a fault occurs in the middle of an optical fiber, an off-network fault of communication is caused, and the fault rate of an optical fiber device is high and the stability is poor.
SUMMERY OF THE UTILITY MODEL
The application provides an optical line protection device and an optical line network transmission device, which are used for solving the technical problems that when a equidirectional second routing optical cable is not arranged in the prior art, an optical transmission network has no optical line protection function, communication disconnection faults can be caused as long as faults occur in the middle of optical fibers, and the fault rate of optical fiber equipment is high and the stability is poor.
In a first aspect, an embodiment of the present application provides an optical line protection device, including a controller, an optical splitter, an optical fiber tester, an optical switch, an optical filter, a first external line interface, and a second external line interface;
the optical switch comprises a first terminal, a second terminal, a third terminal and a fourth terminal, wherein the first terminal and the second terminal are respectively connected with the optical filter, the third terminal is connected with the first end of the optical splitter, and the fourth terminal is connected with the second external wire interface;
the second end of the optical splitter is connected with the first external wire interface, and the third end of the optical splitter is connected with the first end of the optical fiber tester;
the first end of the controller is connected with the second end of the optical fiber tester, the second end of the controller is connected with the optical switch, and the switching of the optical switch is controlled through the optical power signal detected by the optical fiber tester so as to realize the switching of the transmission directions of the first external wire interface and the second external wire interface.
Here, the optical line protection device provided in this embodiment of the present application includes a controller, an optical splitter, an optical fiber tester, an optical switch, an optical filter, a first external line interface, and a second external line interface, where the first external line interface and the second external line interface may implement switching between a main direction and a standby direction of an optical fiber in an optical line network through cooperation of the controller, the optical splitter, the optical fiber tester, the optical switch, and the optical filter, determine whether an optical line connected to a current node has a fault according to conditions such as optical power detected by the optical fiber tester, and if the optical fiber is degraded or interrupted and the detected optical power is smaller than a set threshold, implement switching between the main direction and the standby direction by switching transmission directions of the first external line interface and the second external line interface, thereby ensuring safety of the optical communication network.
Optionally, the optical filter is a passive optical filter.
Here, the passive optical filter is adopted to select the wavelength in the embodiment of the application, and since the optical filter is passive, the optical transmission of the subsequent communication node is not affected by the power failure of the single node, and the safety and the reliability of the optical transmission network are further ensured.
Optionally, the optical filter is a Thin Film Filter (TFF).
Optionally, the first terminal and the second terminal are respectively connected to the optical filter, and include:
the first terminal is connected to a common terminal of the optical filter, and the second terminal is connected to a reflective terminal of the optical filter.
According to the embodiment of the application, the first terminal of the optical switch is connected with the common end of the optical filter, and the second terminal of the optical switch is connected with the reflection end of the optical filter, so that stable filtering of the optical filter is realized, and faults are reduced.
Optionally, the transmission end of the optical filter is connected with an optical communication device.
Here, the embodiment of the present application realizes effective communication between an optical transmission network and a communication device by connecting the transmission end of the optical filter with the optical communication device.
Optionally, the optical switch comprises a fiber-optic type optical switch, a waveguide-driven optical switch, an optical film optical switch, or a folded non-micro-opto-electro-mechanical system mode switch.
Optionally, the optical fiber tester is an optical power meter.
Optionally, the first external line interface and the second external line interface are single optical fiber external line interfaces.
Optionally, the third end of the optical splitter is connected to the first end of the optical fiber tester, and includes:
and the third end of the optical splitter is connected with the first end of the optical fiber tester through a tail fiber.
Here, in the embodiment of the present application, the pigtail is connected to the first end of the optical fiber tester, and the detection optical signal split by the optical splitter is input to the optical fiber tester for signal detection of the optical signal, so that whether the optical line has a fault or not can be determined according to a detection result, whether the line primary and standby directions are switched or not is determined according to the detection result, and the safety and stability of the optical line are further improved.
In a second aspect, an embodiment of the present application further provides an optical line network transmission device, including the optical line protection apparatus according to the first aspect and optional manners of the first aspect, and an optical communication device connected to the optical line protection apparatus.
The embodiment of the application provides an optical line protection device and an optical line network transmission device, the optical line protection device comprises a controller, an optical splitter, an optical fiber tester, an optical switch, an optical filter, a first external line interface and a second external line interface, wherein, the first external interface and the second external interface can realize the switching of the optical fiber main direction and the standby direction in the optical line network through the cooperation of the controller, the optical splitter, the optical fiber tester, the optical switch and the optical filter, determining whether there is fault in the optical line connected with the current node of the optical line according to the optical power detected by the optical fiber tester, if the optical fiber is degraded or interrupted, the detected optical power is less than the set threshold, the switching between the optical fiber main direction and the standby direction is realized by switching the transmission directions of the first external line interface and the second external line interface, thereby ensuring the safety of the optical communication network.
Drawings
The following detailed description of the present application is provided in conjunction with the accompanying drawings, and it is to be understood that the detailed description described herein is merely illustrative and explanatory of the present application and is not restrictive of the invention as described below.
Fig. 1 is a schematic structural diagram of an optical line protection apparatus according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of another optical line protection apparatus according to an embodiment of the present application;
fig. 3 is a schematic view of an application scenario of an optical line protection device according to an embodiment of the present application.
Description of reference numerals:
101: a controller;
102: a light splitter;
103: an optical fiber tester;
104: an optical switch;
105: an optical filter;
106: a first outside line interface;
107: a second peripheral interface;
1041: a first terminal;
1042: a second terminal;
1043: a third terminal;
1044: a fourth terminal;
1021: a first end of the optical splitter;
1022: a second end of the optical splitter;
1031: a first end of the fiber optic tester;
1032; a second end of the fiber optic tester;
1011: a first end of a controller;
1012: a second end of the controller;
1050: a passive optical filter;
201: a first optical communication device;
202: a second optical communication device.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The terms "first," "second," "third," and "fourth," if any, in the description and claims of this application and the above-described figures are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The advent of WDM has led to several tens of times and hundreds of times increase in the capacity of optical communication systems, and it can be said that there is no wavelength division multiplexing technology and thus no optical communication industry that is now vigorously developed. At present, WDM technology is adopted in many trunk transmission systems in China. WDM technology is being industrialized with the move toward more wavelengths, higher rates, greater capacity and greater distances.
At present, most of optical fiber chain type optical wavelength division transmission networks are accessed by unidirectional optical fibers, and have no bidirectional protection and single-fiber bidirectional protection function, so that the following problems can be mainly caused: the bidirectional protection is not provided, and as long as the optical fiber fault exists in the middle, the subsequent optical communication equipment can cause the off-line fault; no single-fiber bidirectional protection function exists; when the node is powered off, all subsequent communication nodes cannot receive optical signals, so that communication faults are caused, and the optical fiber equipment is high in fault rate and poor in stability.
In order to solve the above problems, an embodiment of the present application provides an optical line protection device and an optical line network transmission apparatus, which are composed of a controller, an optical splitter, an optical fiber tester, an optical switch, an optical filter, a first external line interface and a second external line interface.
The Optical line protection device provided by the embodiment of the application can be applied to Optical transmission Network application scenarios such as an Optical transport Network (otn), Dense Wavelength Division Multiplexing (DWDM), Coarse Wavelength Division Multiplexing (CWDM), or Passive Optical Network (PON).
Exemplarily, fig. 1 is a schematic structural diagram of an optical line protection apparatus provided in an embodiment of the present application, and as shown in fig. 1, the optical line protection apparatus includes a controller 101, an optical splitter 102, an optical fiber tester 103, an optical switch 104, an optical filter 105, a first external interface 106, and a second external interface 107.
The optical switch 104 includes a first terminal 1041, a second terminal 1042, a third terminal 1043, and a fourth terminal 1044, where the first terminal 1041 and the second terminal 1042 are respectively connected to the optical filter 105, the third terminal 1043 is connected to the first terminal 1021 of the optical splitter 102, and the fourth terminal 1044 is connected to the second external interface 107.
The second end 1022 of the optical splitter 102 is connected to the first external wire interface 106, and the third end 1023 of the optical splitter 102 is connected to the first end 1031 of the optical fiber tester 103.
The first end 1011 of the controller 101 is connected to the second end 1032 of the optical fiber tester 103, the second end 1012 of the controller 101 is connected to the optical switch 104, and the switching of the optical switch 104 is controlled by the optical power signal detected by the optical fiber tester 103, so as to realize the switching of the transmission directions of the first external wire interface 106 and the second external wire interface 107.
Optionally, the first external line interface and the second external line interface are single optical fiber external line interfaces.
Exemplarily, when the first external line interface is a primary optical fiber connected to the sink node in the primary direction, the first external line interface is a backup optical fiber connected to a subsequent access node when the first external line interface is changed into the primary optical fiber; when the second external interface is active, the optical fiber connected with the subsequent access node is standby and changed into the optical fiber connected with the sink node in the original standby direction.
Optionally, the first terminal and the second terminal are respectively connected to an optical filter, and include: the first terminal is connected to the common terminal of the optical filter, and the second terminal is connected to the reflective terminal of the optical filter.
According to the embodiment of the application, the first terminal of the optical switch is connected with the common end of the optical filter, and the second terminal of the optical switch is connected with the reflection end of the optical filter, so that stable filtering of the optical filter is realized, and faults are reduced.
Optionally, the transmission end of the optical filter is connected to the optical communication device.
In practical application, the optical line protection device comprises two or even number of color light transceiving ports of the optical communication equipment for connecting with the optical communication equipment.
Here, the embodiment of the present application realizes effective communication between an optical transmission network and a communication device by connecting the transmission end of the optical filter with the optical communication device.
Alternatively, the optical switch comprises a fiber-optic type optical switch, a waveguide-driven optical switch, an optical film optical switch, or a folded non-micro-opto-electro-mechanical system mode switch.
Optionally, the fiber optic tester is an optical power meter.
Optionally, the third end of the optical splitter is connected to the first end of the optical fiber tester, and includes:
and the third end of the optical splitter is connected with the first end of the optical fiber tester through the tail fiber.
Here, in the embodiment of the present application, the pigtail is connected to the first section of the optical fiber tester, and the detection optical signal split by the optical splitter is input to the optical fiber tester for signal detection of the optical signal, so that whether the optical line has a fault or not can be determined according to a detection result, whether the line primary and standby directions are switched or not is determined according to the detection result, and the safety and stability of the optical line are further improved.
Optionally, if the optical line access node is powered off, the optical switch-on light remains unchanged in the original state, and the standby direction and the main direction remain unchanged before the power off; after the optical line access node is powered on, the selection of the active and standby directions can be performed according to the switching manner of the active and standby directions described by the above device.
Optionally, the controller in the optical line protection device in this embodiment of the present application may be configured to monitor a power-on state and a power-off state of the optical line access node, and if it is monitored that the optical line access node is switched from the power-off state to the power-on state, the controller may control the optical fiber tester to perform signal detection on the optical signal, select a primary direction and a standby direction according to optical power of the optical signal, and determine whether to maintain an original state or perform switching of the primary direction and the standby direction.
Optionally, the apparatus may further include a relay, the relay may be connected to a power supply in the circuit, and the controller may detect whether the optical line access node recovers the power-on state according to the relay, so as to determine the active and standby directions of the optical line after the optical line access node is powered on.
The optical line protection device provided by the embodiment of the application comprises a controller, an optical splitter, an optical fiber tester, an optical switch, an optical filter, a first external line interface and a second external line interface, wherein the first external line interface and the second external line interface can realize the switching of the optical fiber main direction and the standby direction in an optical line network through the cooperation of the controller, the optical splitter, the optical fiber tester, the optical switch and the optical filter, determine whether a fault exists in an optical line connected with a current node according to the conditions of optical power and the like detected by the optical fiber tester, and realize the switching of the optical fiber main direction and the standby direction through the switching of the transmission directions of the first external line interface and the second external line interface if the optical fiber is degraded or interrupted and the detected optical power is smaller than a set threshold value, thereby ensuring the safety of the optical communication network.
Optionally, in order to ensure stability of subsequent transmission after the single node is powered off, a passive optical filter is used as the optical filter in this embodiment, correspondingly, an optical fiber tester is taken as an example of an optical power meter, and fig. 2 is a schematic structural diagram of another optical line protection apparatus provided in this embodiment, as shown in fig. 2, the optical line protection apparatus includes a controller 101, an optical splitter 102, an optical power meter 1030, an optical switch 104, a passive optical filter 1050, a first external line interface 106, and a second external line interface 107.
Exemplarily, in fig. 2, taking the optical line protection device as an example of externally connecting two optical communication devices, the passive optical filter 1050 is connected to the transceiving ends of the first optical communication device 201 and the second optical communication device 202, respectively.
Optionally, the optical filter is a dielectric Film filter (TFF).
In a possible implementation manner, the optical splitter has three ports, the second end 1022 is connected to a single optical fiber in the direction of the primary convergence point, that is, the first external line interface 106, the third end 1023 connects the detected optical signal (usually, 3% to 5% of the traffic optical signal at the second end 1022) dropped from the traffic optical signal at the second end 1022 to the optical power meter 1030 through a pigtail, and the third end 1023 connects the traffic optical signal (usually, 95% to 97% of the traffic optical signal at the second end 1022) dropped from the traffic optical signal at the second end 1022 to the third terminal 1043 of the optical switch 104, where the optical switch is a2 × 2 optical switch; one end of the optical power meter 1030 is connected with the detection optical signal split from the second end 1022 through the optical splitter 102 through a pigtail, and the other end is logically connected with the controller of the optical switch 104; a first terminal 1041, a second terminal 1042, a third terminal 1043, and a fourth terminal 1044 of the optical switch 104 are respectively connected to a common port (COM) of the passive optical filter 1050, a reflection port of the passive optical filter, a service optical signal port split by the optical splitter, and a single optical fiber in the direction of a standby aggregation node, where the filter is a three-port filter; a common terminal (COM) of the passive optical filter is connected to the first terminal 1041 of the 2 × 2 optical switch, a reflection terminal of the three-port passive optical filter is connected to the second terminal 1042 of the 2 × 2 optical switch, and each color light wavelength of a transmission terminal of the three-port passive optical filter is connected to a transceiver terminal of the optical communication device corresponding to the node.
Exemplarily, fig. 3 is a schematic view of an application scenario of an optical line protection device provided in this embodiment of the present application, where the application scenario includes an a aggregation node and a B aggregation node, where the a aggregation node is a main service direction of an access node a1, a2, a3, and is a standby service direction of an access node B1, B2, B3 at the same time; the B sink node is the primary traffic direction of the access nodes B1, B2, B3, and is the backup traffic direction of the access nodes a1, a2, a 3.
A light splitter in the optical line protection device sends detection optical signals split from the first external line interface service optical signals to a light detector; when the optical fiber between the access nodes a1 and a2 in the direction of the main aggregation node a fails, a light detector in the optical line protection device of the access node a2 measures that an optical power value is smaller than a preset threshold value, and then informs an optical switch controller; an optical switch controller, which controls the first terminal 1041 of the 2 x 2 optical switch to be connected to the third terminal 1043 and inversely connected to the fourth terminal 1044 from the beginning, and controls the second terminal 1042 of the optical switch to be connected to the fourth terminal 1044 and inversely connected to the third terminal 1043 from the beginning, and the access node a2 is accessed to the spare B sink node; the optical line protection device of the access node a3 simultaneously performs the same operation as the access node a2 and accesses the standby B sink node; when the optical fiber fault between the access node a1 and a2 is recovered to normal, the optical switch controller is notified when an optical power value measured by the optical detector in the optical line protection device of the access node a2 is greater than a preset threshold value; the optical switch controller controls the optical switch to restore, that is, the first terminal 1041 is connected to the fourth terminal 1044 and reversely connected to the third terminal 1043, the second terminal 1042 of the optical switch is connected to the third terminal 1043 and reversely connected to the fourth terminal 1044, and the access node a2 is accessed to the active a sink node; the optical line protection device of the access node a3 performs the same operation as the access node a2, and accesses the active a aggregation node.
In a possible implementation manner, an optical splitter in the optical line protection device sends detected optical signals separated from the service optical signals of the first external line interface 106 to a light detector, and when the access node a2 is powered off, because an optical filter is a passive device, the power of the access node a2 node is powered off, which does not affect the optical transmission of the subsequent access node a3, thereby ensuring the safety of the optical wavelength division transmission network.
The embodiment of the application adopts the passive optical filter to select the wavelength, because the optical filter is passive, the single-node power failure can not influence the optical transmission of the subsequent communication node, when the node is powered off, the subsequent node can still normally carry out the optical transmission, and the safety and the reliability of the optical transmission network are further ensured.
An embodiment of the present application further provides an optical line network transmission device, including the above optional manner, and an optical communication device connected to the optical line protection device.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
In this application, unless explicitly stated otherwise, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as meaning fixedly connected, removably connected, or integrally formed, mechanically connected, electrically connected, or otherwise communicable with each other; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected internally or in any other manner known to those skilled in the art, unless otherwise specifically limited. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115529516A (en) * | 2022-10-28 | 2022-12-27 | 中国联合网络通信集团有限公司 | Remote unit protection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115529516A (en) * | 2022-10-28 | 2022-12-27 | 中国联合网络通信集团有限公司 | Remote unit protection system |
| WO2024087636A1 (en) * | 2022-10-28 | 2024-05-02 | 中国联合网络通信集团有限公司 | Remote-unit protection system |
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