CN116566478A - Communication equipment for source-sink synchronous switching and optical line protection method - Google Patents
Communication equipment for source-sink synchronous switching and optical line protection method Download PDFInfo
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- CN116566478A CN116566478A CN202310663163.7A CN202310663163A CN116566478A CN 116566478 A CN116566478 A CN 116566478A CN 202310663163 A CN202310663163 A CN 202310663163A CN 116566478 A CN116566478 A CN 116566478A
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- 238000004891 communication Methods 0.000 title claims abstract description 154
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000001360 synchronised effect Effects 0.000 title claims description 24
- 238000001514 detection method Methods 0.000 claims abstract description 67
- 230000002159 abnormal effect Effects 0.000 claims description 35
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- 238000011084 recovery Methods 0.000 claims description 11
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- 230000009286 beneficial effect Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/03—Arrangements for fault recovery
- H04B10/038—Arrangements for fault recovery using bypasses
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
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Abstract
The invention belongs to the field of optical communication, and provides a communication device for synchronously switching a source and a destination and an optical line protection method, which comprise a control unit, a first optical detector, a second optical detector, a first optical switch, a second optical switch, a third optical switch and an optical splitter, wherein the first optical splitter divides signals into two paths at a transmitting end and passes through the two optical switches to realize double-emission of optical signals, the two optical detectors are arranged at a receiving end and are used for detecting the two paths of optical signals, and a control unit is arranged for controlling the optical switches at the receiving end according to the detection result of the optical detectors to realize the selection and the collection of the optical signals, and the control unit is also used for controlling the two switches at the transmitting end of the optical signals so as to close the corresponding signals at the transmitting end when a corresponding link fails.
Description
Technical Field
The invention belongs to the field of optical communication, and in particular relates to a communication device and an optical line protection method for source-sink synchronous switching.
Background
In an optical communication system, in order to prevent information interruption caused by optical cable faults, a main and standby route is generally adopted for simultaneous transmission, equipment adopts a dual-transceiver method to protect the line, and service interruption time caused by optical cable interruption is required to be less than or equal to 50ms.
In the conventional dual-transmission and reception scheme, if the receiving end of the source-sink communication is not switched, that is, the receiving end with the source end works on the main channel and the receiving end with the sink end works on the standby channel, if the receiving end is not interrupted at the same time by the main receiving optical fiber or the standby receiving optical fiber, however, in some fields, for example, relay protection signals of a power grid require synchronous routing of the sending and receiving of the source-sink communication.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: in the traditional dual-transmission selective receiving scheme, if the receiving end of source-sink communication is not switched, namely the receiving end with the source end works in the main channel and the receiving end with the sink end works in the standby channel, if the receiving end is not interrupted at the same time by the main receiving optical fiber or the standby receiving optical fiber, the invention solves the problem that the source-sink end is switched at the same time in the dual-transmission selective receiving scheme in the fields such as relay protection signals of a power grid.
In view of this, overcoming the drawbacks of the prior art is a problem to be solved in the art.
The invention achieves the aim through the following technical scheme:
in a first aspect, a communications device for source-sink synchronous switching is provided, including: the optical system comprises a control unit, a first optical detector, a second optical detector, a first optical switch, a second optical switch, a third optical switch and an optical splitter;
the public end of the optical splitter is used for connecting the signal sending end of the service device, and the first optical switch and the second optical switch are respectively arranged on two paths split by the optical splitter;
the third optical switch is connected to an optical path transmitted by an optical signal sent by the opposite-side communication equipment, and the public end of the third optical switch is used for being connected with a signal receiving end of the service device;
the control unit is respectively connected with the first optical switch, the second optical switch, the third optical switch, the first optical detector and the second optical detector;
the optical splitter is used for splitting an optical signal from the service device into two paths of optical signals so as to send the optical signals to opposite-side communication equipment through the first optical switch and the second optical switch;
the first optical detector is used for detecting a first optical signal from the opposite-side communication device on the main circuit, and the second optical detector is used for detecting a second optical signal from the opposite-side communication device on the standby circuit;
The control unit is used for controlling the first optical switch, the second optical switch and the third optical switch according to detection results of the first optical detector and the second optical detector so as to control the communication equipment to work in a main path or a standby path.
Preferably, the main path comprises a main transmitting optical path and a main receiving optical path, the standby path comprises a standby transmitting optical path and a standby receiving optical path, the first optical switch is arranged on the main transmitting optical path, and the second optical switch is arranged on the standby transmitting optical path;
the first optical detector is used for detecting the size of an optical signal on a main receiving optical path, the second optical detector is used for detecting the size of an optical signal on a standby receiving optical path, the control unit is used for controlling the conduction states of the first optical switch and the second optical switch according to the detection result of the first optical detector and the detection result of the second optical detector, and the control unit is also used for controlling the conduction condition of the third optical switch according to the detection result of the first optical detector and the detection result of the second optical detector so as to select one path of signal to output to a service device.
Preferably, in the primary-standby switching process, when the third optical switch switches from the standby receiving optical path to the primary receiving optical path, the primary transmitting optical path where the first optical switch is located is synchronously turned on, and the standby transmitting optical path where the second optical switch is located is synchronously turned off;
When the third optical switch is switched from the main receiving optical path to the standby receiving optical path, the main receiving optical path where the first optical switch is located is synchronously closed, and the standby transmitting optical path where the second optical switch is located is synchronously turned on.
Preferably, in the initial state, the main path and the standby path are good, the first optical switch and the second optical switch are in a conducting state, the third optical switch receives optical signals from the main path or the standby path, and the control unit is used for controlling the states of the corresponding optical switches according to the detection result of the optical signals and ensuring that the source and the sink work in the main path or the standby path simultaneously;
when the communication equipment works in a main way, the first optical detector and the second optical detector monitor the optical signals of the corresponding receiving optical paths in real time, and when the first optical detector detects that the optical signals of the main receiving optical path are normal and the second optical detector detects that the optical signals of the spare receiving optical path are normal, the first optical switch, the second optical switch and the third optical switch are kept unchanged;
when the first optical detector detects that the optical signal of the main receiving optical path is abnormal and the second optical detector detects that the optical signal of the standby receiving optical path is normal, the control unit is used for controlling the third optical switch to the standby receiving optical path, meanwhile, the control unit is used for controlling the first optical switch to be disconnected, and the second optical switch is kept unchanged, so that the communication equipment works in the standby path.
Preferably, in the initial state, the main path and the standby path are good, the first optical switch and the second optical switch are in a conducting state, the third optical switch receives optical signals from the main path or the standby path, and the control unit is used for controlling the states of the corresponding optical switches according to the detection result of the optical signals and ensuring that the source and the sink work in the main path or the standby path simultaneously;
after the communication equipment is switched to a standby path, the first optical detector and the second optical detector monitor the optical signals of the corresponding receiving optical paths in real time, and when the first optical detector detects that the optical signals of the main receiving optical path are normal and the second optical detector detects that the optical signals of the standby receiving optical path are normal, the first optical switch, the second optical switch and the third optical switch are kept unchanged;
when the first optical detector detects that the optical signal of the main receiving optical path is normal and the second optical detector detects that the optical signal of the standby receiving optical path is abnormal, the control unit is used for controlling the third optical switch to the main receiving optical path, and meanwhile, the control unit is used for controlling the second optical switch to be disconnected and controlling the first optical switch to work on the main sending optical path so as to enable the communication equipment to work on the main path.
Preferably, the communication device is capable of link recovery:
after the line fault is recovered, opening a first optical switch and/or a second optical switch of the communication equipment at the side according to a fault recovery command so as to open a transmitting port of the communication equipment at the side; after the opposite side communication equipment detects the corresponding optical signal, an optical transmission link of the opposite side communication equipment is opened; after the detector of the communication equipment at the side receives the optical signal, the control unit controls the third optical switch to work on the main path or the standby path according to the optical signal so as to realize the recovery of the link;
or under the condition that the first optical detector and the second optical detector do not receive light, periodically or randomly opening a transmitting port of the communication equipment on the side so as to realize automatic recovery of a link.
In a second aspect, an optical line protection method for source-sink synchronous switching is provided, including:
the optical splitter splits an optical signal from a service device into two paths of optical signals to transmit the optical signals to opposite-side communication equipment through the first optical switch and the second optical switch;
the first optical detector detects a first optical signal from the opposite side communication device on the main path, and the second optical detector detects a second optical signal from the opposite side communication device on the standby path;
The control unit controls the first optical switch, the second optical switch and the third optical switch according to detection results of the first optical detector and the second optical detector so as to control the communication equipment to work in a main path or a standby path.
Preferably, in the initial state, the main path and the standby path are good, the first optical switch and the second optical switch are in a conducting state, the third optical switch receives optical signals from the main path or the standby path, and the control unit is used for controlling the states of the corresponding optical switches according to the detection result of the optical signals and ensuring that the source and the sink work in the main path or the standby path simultaneously;
the control unit controls the first optical switch, the second optical switch and the third optical switch according to detection results of the first optical detector and the second optical detector so as to control the communication equipment to work in a main path or a standby path, and the control unit comprises:
when the communication equipment works in a main path, the first optical detection and the second optical detection are used for detecting optical signals of a receiving optical path corresponding to the real-time monitor;
when the first optical detection detects that the main receiving path light is normal and the second optical detector detects that the standby path light signal is normal, the first optical switch, the second optical switch and the third optical switch are kept unchanged;
When the first optical detection detects that the light of the main receiving path is abnormal and the second optical detector detects that the standby path light signal is normal, the control unit controls the third optical switch to be switched to the standby receiving path, meanwhile, the control unit controls the first optical switch to be switched off, and the second optical switch is kept unchanged, so that the communication equipment works in the standby path.
Preferably, in the initial state, the main path and the standby path are good, the first optical switch and the second optical switch are in a conducting state, the third optical switch receives optical signals from the main path or the standby path, and the control unit is used for controlling the states of the corresponding optical switches according to the detection result of the optical signals and ensuring that the source and the sink work in the main path or the standby path simultaneously;
the control unit controls the first optical switch, the second optical switch and the third optical switch according to the detection results of the first optical detector and the second optical detector so as to control the communication equipment to work in a main path or a standby path, and the control unit further comprises:
after the communication equipment is switched to a standby path, the first optical detection and the second optical detection are used for detecting optical signals of the receiving optical paths corresponding to the real-time monitors;
when the first optical detection detects that the main receiving path light is normal and the second optical detector detects that the standby path light signal is normal, the first optical switch, the second optical switch and the third optical switch are kept unchanged;
When the first optical detection detects that the light of the main receiving path is normal and the second optical detector detects that the optical signal of the standby path is abnormal, the control unit is used for controlling the third optical switch to the main receiving path, and meanwhile, the control unit is used for controlling the second optical switch to be disconnected and controlling the first optical switch to work in the main sending path so that the communication equipment works in the main path.
Preferably, the control unit controls the first optical switch, the second optical switch and the third optical switch according to the detection results of the first optical detector and the second optical detector, so as to control the communication device to work in a main path or a standby path, specifically:
when the first optical detector detects that the optical signal is abnormal and the second optical detector detects that the optical signal is normal, the control unit controls the first optical switch to be disconnected, controls the second optical switch to be connected, and controls the third optical switch to be switched to be connected with a standby path;
when the second detector detects that the optical signal is abnormal and the first optical detector detects that the optical signal is normal, the control unit controls the second optical switch to be disconnected, controls the first optical switch to be connected, and controls the third optical switch to be switched to be connected with a main path.
Unlike the prior art, the beneficial effects of the invention include at least:
the invention adopts the optical switch to select the main path or the standby path for receiving at the receiving end, adopts the optical splitter at the transmitting end, and is also cascaded with two optical switches after the optical splitter, and the blocking of the transmitted signal is realized through the optical switch, thereby realizing the dual-transmission selection and receiving of the optical signal, and also realizing the simultaneous switching of the source and the sink ends.
Further, the invention also provides a recovery mechanism of the blocked optical path after the optical cable is repaired.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it will be apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained from these drawings without inventive effort to a person of ordinary skill in the art, which drawings are intended to provide a further understanding of the present disclosure and constitute a part of the specification, together with the following detailed description serve to explain the present disclosure, but not to limit the present disclosure. In the drawings:
Fig. 1 is a schematic structural diagram of a communication device for source-sink synchronous switching according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a first connection state of a communication device for source-sink synchronous switching according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a second connection state of a communication device for source-sink synchronous switching according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a third connection state of a communication device for source-sink synchronous switching according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a fourth connection state of a communication device for source-sink synchronous switching according to an embodiment of the present invention;
fig. 6 is a schematic diagram of another connection mode of a communication device for source-sink synchronous switching according to an embodiment of the present invention;
fig. 7 is a flowchart of an optical line protection method for source-sink synchronous switching provided in an embodiment of the present invention;
fig. 8 is a specific workflow diagram of a source-sink synchronous switching communication device detector when detecting a signal according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other. The invention will be described in detail below with reference to the drawings and examples.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Example 1
In this embodiment, a communication device for source-sink synchronous switching is proposed, as shown in fig. 1,
comprising the following steps: the optical system comprises a control unit, a first optical detector, a second optical detector, a first optical switch, a second optical switch, a third optical switch and an optical splitter, wherein the public end of the optical splitter is used for being connected with a signal sending end of a service device, the first optical switch and the second optical switch are respectively arranged on two paths separated by the optical splitter, the third optical switch is connected with an optical path transmitted by an optical signal sent by opposite-side communication equipment, the public end of the third optical switch is used for being connected with a signal receiving end of the service device, and the control unit is respectively connected with the first optical switch, the second optical switch, the third optical switch, the first optical detector and the second optical detector.
In practical use, the optical splitter is configured to split an optical signal from the service device into two paths of optical signals, so as to send the optical signals to the opposite-side communication device through the first optical switch and the second optical switch, the first optical detector is configured to detect a first optical signal from the opposite-side communication device on the main path, the second optical detector is configured to detect a second optical signal from the opposite-side communication device on the standby path, and the control unit is configured to control the first optical switch, the second optical switch and the third optical switch according to detection results of the first optical detector and the second optical detector, so as to control whether the communication device works on the main path or the standby path.
The main path comprises a main sending light path and a main receiving light path, the standby path comprises a standby sending light path and a standby receiving light path, the first optical switch is arranged on the main sending light path, and the second optical switch is arranged on the standby sending light path.
The first optical switch comprises a main path port A1 and a control port B1, the main path port A1 is arranged on a main transmission optical path of the optical splitter, the control port B1 controls on-off of a main transmission optical path, the second optical switch comprises a standby path port A2 and a control port B2, the standby path port A2 is arranged on a standby transmission optical path of the optical splitter, the control port B2 controls on-off of a standby transmission optical path, the third optical switch comprises a main path port A3 and a standby path port C3, the main path port A3 is arranged on a main receiving optical path, and the standby path port C3 is arranged on a standby receiving optical path.
The third optical switch comprises a main path port A3, a control port B3 and a standby path port C3, wherein the main path port A3 is arranged on a main receiving optical path, the standby path port C3 is arranged on a standby receiving optical path, and the control port B3 is selectively conducted with the main path port A3 or the standby path port C3.
The optical splitter splits an optical signal from an external service device into a first optical signal and a second optical signal, the first optical signal is sent from a main path port A1 to a main path port A3 on a third optical switch of a main receiving end of the opposite side communication device through a control port B1 of the first optical switch, the second optical signal is sent from a standby path port A2 to a standby path port C3 on the third optical switch of a standby receiving end of the opposite side communication device through a control port B2 of the second optical switch, and the control port B3 on the third optical switch controls whether the third optical switch main path port A3 is turned on or whether the standby path port C3 is turned on so as to switch whether the communication device works in a main path or a standby path.
The first optical detector is used for detecting the size of an optical signal on a main receiving optical path, the second optical detector is used for detecting the size of an optical signal on a standby receiving optical path, the control unit is used for controlling the conduction states of the first optical switch and the second optical switch according to the detection result of the first optical detector and the detection result of the second optical detector, and the control unit is also used for controlling the conduction condition of the third optical switch according to the detection result of the first optical detector and the detection result of the second optical detector so as to select one path of signal to output to a service device.
In order to clearly explain the implementation process of the foregoing solution, an explanation is made with reference to fig. 2, and as shown in fig. 2, a structure diagram of the cooperation of two communication devices is shown, where the structure and the working principle of the two communication devices are the same, and the difference is mainly that there are corresponding differences in the deployment positions and the transmission and processing of signals.
The first communication device includes a first control unit, a first optical detector, a second optical detector, a first optical switch, a second optical switch, a third optical switch, and a first optical splitter.
The second communication device comprises a second control unit, a third light detector, a fourth light switch, a fifth light switch, a sixth light switch and a second light splitter, and the first communication device has the same function as the second communication device.
The first optical splitter splits an optical signal from a service device into a first optical signal and a second optical signal, the first optical signal is sent to a sixth optical switch in the second communication device through the first optical switch, the second optical signal is sent to the sixth optical switch in the second communication device through the second optical switch, and the sixth optical switch selects one path of optical signal to output to the service device corresponding to the second communication device according to an instruction of the second control unit.
The second optical splitter splits an optical signal from a service device into a third optical signal and a fourth optical signal, the third optical signal is sent to a third optical switch in the first communication device through the fourth optical switch, the fourth optical signal is sent to the third optical switch in the first communication device through the fifth optical switch, and the third optical switch selects one path of optical signal to output to the service device corresponding to the first communication device according to an instruction of the first control unit.
The routes of the first optical signal and the third optical signal are a main path 91 and a main path 92, the routes of the second optical signal and the fourth optical signal are a standby path 101 and a standby path 102 (there is no distinction between the main path and the standby path for convenience of explanation), so that the first communication device is a source end and the second communication device is a sink end (there is no distinction between the source end and the sink end for convenience of explanation).
The first light detector and the second light detector detect the optical signals from the main path 92 and the standby path 102 respectively, and one path is selected to be output to the service device through the third optical switch under the control of the first control unit, the third light detector and the fourth light detector detect the optical signals from the main path 91 and the standby path 101 respectively, and one path is selected to be output to the service device through the sixth optical switch under the control of the second control unit, and the service device can be a single wavelength optical signal or a group of optical signals with a same source and sink of a plurality of wavelength sources.
Therefore, the communication equipment can complete double transmission and reception of the optical signals between the source end and the destination end.
Then, how the third optical switch is synchronously switched with the first optical switch and the second optical switch, respectively, with the active-standby switching will be described next.
In the process of switching between the main and the standby, when the third optical switch is switched from the standby receiving optical path to the main receiving optical path, the main transmitting optical path where the first optical switch is located is synchronously turned on, the standby transmitting optical path where the second optical switch is located is synchronously turned off, and when the third optical switch is switched from the main receiving optical path to the standby receiving optical path, the main receiving optical path where the first optical switch is located is synchronously turned off, and the standby transmitting optical path where the second optical switch is located is synchronously turned on.
When the communication equipment works in the standby path, the first optical detector detects that the opposite-side main path optical signal is normal, the second optical detector detects that the opposite-side standby path optical signal is abnormal, the control unit controls the third optical switch to switch from the standby receiving optical path to the main receiving optical path according to detection results of the first optical detector and the second optical detector, and the control unit also controls the corresponding first optical switch to conduct the main path optical signal and controls the second optical switch to close the standby path signal.
When the communication equipment works in a main path, the opposite-side main path optical signals detected by the first optical detector are abnormal, the opposite-side standby path optical signals detected by the second optical detector are normal, the control unit controls the third optical switch to switch from a main receiving optical path to a standby receiving optical path according to detection results of the first optical detector and the second optical detector, and the control unit also controls the corresponding first optical switch to close the main path optical signals and controls the second optical switch to conduct the standby path pipe signals, so that the conduction of the optical switches is synchronous.
Besides, the main circuit of the line side of the first communication device receives signals, the optical signals received by the main circuit are split, part of split light enters the first optical detector, most of split light enters the third optical switch port, and the size of the light from the main circuit optical signals can be detected through calibration of the first optical detector.
The standby path of the line side of the first communication equipment receives the signal, the standby path receives the optical signal through light splitting, partial light split enters the second optical detector, most of light split enters the other port of the third optical switch, and the size of the standby path optical signal light can be detected through the calibration of the second optical detector.
How the communication device performs simultaneous source-sink switching will be described in detail below.
In the initial state, the main path and the standby path are good, the first optical switch and the second optical switch are in the on state, the third optical switch receives optical signals from the main path or the standby path, the control unit is used for controlling the state of the corresponding optical switch according to the optical signal detection result and ensuring that the source and the sink simultaneously work in the main path or the standby path, when the communication equipment works in the main path, the first optical detector and the second optical detector monitor the optical signals of the corresponding receiving optical paths in real time, when the first optical detector detects the optical signals of the main receiving optical path to be normal, the second optical switch and the third optical switch are kept unchanged, when the first optical detector detects the optical signals of the main receiving optical path to be abnormal, and when the second optical detector detects the optical signals of the standby receiving optical path to be normal, the control unit is used for controlling the third optical switch to be switched to the standby receiving optical path, and meanwhile, the control unit is used for controlling the first optical switch to be switched off, and the second optical switch keeps unchanged, so that the equipment works in the standby path.
And the server knows the states of the first optical switch, the second optical switch and the third optical switch of the corresponding board card of the corresponding communication equipment.
As shown in fig. 3, when the communication device works in the main circuit, because the transmission and the reception of the main circuit are both interrupted at the same time, that is, the main circuit 91 and the main circuit 92 are disconnected (for example, the optical cable is cut off), the corresponding signal light cannot be detected at the first optical detector of the first communication device at the source end, the optical signal detected by the second optical detector is normal, the first control unit instructs the third optical switch to switch, and at the same time, the first control unit instructs the first optical switch to switch, at the same time, the main circuit optical transmission at the source end is cut off, at the sink end, because the optical path transmission and the reception are simultaneously interrupted, the third optical detector cannot detect the light, the fourth optical detector detects the optical signal is normal, the second control unit instructs the sixth optical switch to switch, and at the same time, the second control unit instructs the fourth optical switch to switch, at the same time, the main circuit optical transmission at the sink end is cut off, and the sink end is simultaneously switched.
As shown in fig. 4, the communication device is operated in the main circuit, the main circuit 92 is interrupted due to a certain cause, the main circuit 91 is operated normally, if the optical signal detected by the first optical detector of the first optical communication device at the source end is abnormal, the second optical detector detects that the light is normal, the first control unit instructs the third optical switch to switch, and meanwhile, the first control unit instructs the first optical switch to switch the main circuit of the source end, that is, 91 optical fibers do not have the optical signal at the source end, and at the destination end, because 91 optical fibers do not have the optical signal at the source end, the third optical detector detects that the light is not detected, the fourth optical detector detects that the optical signal is normal, the second control unit instructs the sixth optical switch to switch, and meanwhile, the second control unit instructs the fourth optical switch to switch, and meanwhile, the main circuit of the destination end is cut, and the main circuit and the standby circuit are simultaneously switched.
As shown in fig. 5, the communication device works in the main circuit, 91 optical fibers of the main circuit are interrupted for some reason, 92 optical fibers work normally, at the host end, the third optical detector detects abnormal optical signals due to the interruption of the 91 optical fibers, the fourth optical detector detects normal optical signals, the second control unit commands the sixth optical switch to switch, meanwhile, the second control unit commands the fourth optical switch to switch, at the moment, the host end main circuit optical transmission is cut off, the first optical detector of the first optical communication equipment at the source end cannot detect light (because the main optical transmission of the host end is cut off), the second optical detector detects light normally, the first control unit commands the third optical switch to switch, and meanwhile, the first control unit commands the first optical switch to switch, at the moment, the main optical transmission of the source end is cut off, the main optical transmission and the standby optical transmission are simultaneously switched, and the main optical transmission and the standby optical transmission are switched to the standby optical transmission and the standby optical transmission are simultaneously switched.
If the transmission and the reception of the standby path are interrupted (for example, the optical cable is cut off) or the optical fiber of the standby path 101 is interrupted for some reason, the optical fiber of 102 is normal or the optical fiber of the standby path 101 is normal, and the optical fiber of 102 is interrupted, then the first optical detector of the first optical communication device at the source end detects that the optical signal is normal, the second optical detector detects that the optical signal is normal or abnormal, then the third optical switch, the first optical switch and the second optical switch are all unchanged, and at the destination end, the third optical detector detects that the optical signal is normal, the fourth optical switch detects that the optical signal is normal or abnormal, then the sixth optical switch, the fourth optical switch and the fifth optical switch are all unchanged, that is, the main path of the source and the destination are not switched, and the source and the destination are all operated in the main path.
The above description is of the case of source-sink synchronous switching occurring in the state where the communication apparatus is operating in the main path, and the following description is of the case of source-sink synchronous switching in the state where the communication apparatus is operating in the standby path.
After the communication equipment is switched to the standby path, the first optical detector and the second optical detector monitor the optical signals of the corresponding receiving optical paths in real time, when the first optical detector detects that the optical signals of the main receiving optical path are normal, and the second optical detector detects that the optical signals of the standby receiving optical path are normal, the first optical switch, the second optical switch and the third optical switch are kept unchanged, when the first optical detector detects that the optical signals of the main receiving optical path are normal, and the second optical detector detects that the optical signals of the standby receiving optical path are abnormal, the control unit is used for controlling the third optical switch to be switched to the main receiving optical path, and meanwhile, the control unit is used for controlling the second optical switch to be disconnected and controlling the first optical switch to work in the main transmitting optical path so as to enable the communication equipment to work in the main path.
Because the main path and the standby path are not different in the present invention, only for convenience of explanation, when the communication device normally works in the standby path, the switching of the specific switch is consistent with the situation that the communication device normally works in the main path, and the switching of the specific switch can be inferred simply according to the above description, and will not be repeated here.
The communication device includes, in addition to the above-described operation states, the following cases:
if the source end and the destination end continue to work in the main path without any operation.
If the main path is abnormal and works in the standby path, and the standby path also fails for some reason, the source end and the destination end both continue to work in the standby path without any operation.
And assuming that the main and standby paths are abnormal at the same time, the source end and the destination end of the group are kept in the original state, and no operation is performed.
Under the working state of the communication equipment, if the corresponding transmitting port of the fault side is closed, the source and the destination of the fault route are closed to transmit optical signals, and after the fault of the fault route is eliminated, the link cannot be automatically recovered due to the closing of the transmitting signals, and the recovery of the link can be realized by the following method:
after the line fault is recovered, a first optical switch and/or a second optical switch of the communication equipment at the side are/is opened according to a fault recovery command to open a transmitting port of the communication equipment at the side, wherein after the opposite side communication equipment detects a corresponding optical signal, an optical transmitting link of the opposite side communication equipment is opened, and after the optical signal is received by a detector of the communication equipment at the side, a control unit controls the third optical switch to work on a main path or a standby path according to the optical signal so as to recover the link;
When the communication device switches from the main path to the standby path and the transmission of the main path is cut off, after the optical cables of the main path 91 and the main path 92 are repaired, the transmission of signals is cut off due to the first optical switch at the source end and the fourth optical switch at the destination end, so that even if the optical cables are repaired, the first detector at the source end and the third detector at the destination end cannot detect the optical signals, and the whole link cannot be recovered, so that the link can be recovered by the following two methods at this time.
The main method for recovering the link comprises the following steps: when the optical cable of the main path 91 or the main path 92 is repaired, the first optical switch or the fourth optical switch is switched in a manual mode, for example, the fourth optical switch is switched in a command mode, so that the host end sends a main path sending signal to the main path, the first optical detector at the receiving end of the main path of the source end receives the optical signal sent by the host end, and the first control unit opens the optical switch of the main path to send the main path optical signal, so that the restoration of the main optical path sending is completed at both the host end and the source end, and the main optical path is restored.
The method is to recover the optical path signal by manual participation, and the following method is to recover the optical signal without manual participation, and comprises periodically or randomly opening a transmitting port of the opposite side communication equipment under the condition that the first optical detector and the second optical detector do not receive light so as to realize automatic recovery of a link.
The main method for recovering the link is as follows: when the third optical switch performs switching action, the corresponding transmission signal light on the original working path is turned off, after a period of time t1 (t 1 time is long enough to ensure that the opposite end can also realize optical path switching, so that the source and the destination can be switched to the main path or the standby path), under the condition that the corresponding optical detector detects that the optical signal is abnormal, the optical switch on the corresponding transmission side is turned on periodically (with t2 as a period) or at random time intervals for a period of time, after the corresponding detector receives the optical signal transmitted by the corresponding optical path of the opposite end, the corresponding transmission signal is turned on for a long time, so that after the optical cable fault is eliminated, the corresponding optical link can be recovered without manual participation, and after the optical link is recovered, whether the optical link is to be switched from the standby optical path to the main optical path is determined by a switching strategy.
Example 2:
in embodiment 1, a manner of cooperation of two communication devices is described, and the main connection manner of the two communication devices may also be as shown in fig. 6, and it should be noted that the differences between fig. 6 and fig. 2 are mainly that the manners of connecting fibers of the first optical switch, the second optical switch, the fourth optical switch and the fifth optical switch are different, but all the manners are the functions of realizing on-off of the transmitted optical signals, so the working mechanism of the communication device is please refer to embodiment 1 and is not repeated herein.
Example 3:
the foregoing embodiment 1 proposes a communication device for source-sink synchronous switching, and in this embodiment, an optical line protection method applied to the foregoing communication device is provided, and a specific flow is shown in fig. 7, including:
step 101: the optical splitter splits an optical signal from a service device into two optical signals to transmit the optical signals to an opposite-side communication device through the first optical switch and the second optical switch.
The first optical switch comprises a main path port A1 and a control port B1, the main path port A1 is arranged on a main transmission optical path of the optical splitter, the control port B1 controls on-off of a main transmission optical path, the second optical switch comprises a standby path port A2 and a control port B2, the standby path port A2 is arranged on a standby transmission optical path of the optical splitter, the control port B2 controls on-off of a standby transmission optical path, the third optical switch comprises a main path port A3 and a standby path port C3, the main path port A3 is arranged on a main receiving optical path, the standby path port C3 is arranged on a standby receiving optical path, and the control port B3 on the third optical switch controls the on-off of the main path port A3 or the standby path port C3 so as to switch whether communication equipment works on the main path or the standby path.
The dual transmission function of the service device transmitting signals can be realized according to the above.
Step 102: the first photodetector detects a first optical signal from the contralateral communication device on the main path, and the second photodetector detects the second optical signal from the contralateral communication device on the auxiliary path.
The first optical detector is arranged at the main receiving end of the communication equipment and used for detecting the optical signals from the main receiving optical path, and the second optical detector is arranged at the standby receiving end of the communication equipment and used for detecting the optical signals from the standby receiving optical path.
Step 103: the control unit controls the first optical switch, the second optical switch and the third optical switch according to detection results of the first optical detector and the second optical detector so as to control the communication equipment to work in a main path or a standby path.
In the initial state, the main path and the standby path are good, the first optical switch and the second optical switch are in a conducting state, and the control unit is used for controlling the states of the corresponding optical switches according to the optical signal detection result.
Two main situations are included:
the first method comprises the steps that when the communication equipment works in a main path, the first optical detection and the second optical detection are used for detecting optical signals of a receiving optical path corresponding to the real-time monitor, when the first optical detection is used for detecting that the main receiving optical path is normal, the second optical detection is used for detecting that the standby optical path is normal or abnormal, the first optical switch, the second optical switch and the third optical switch are kept unchanged, when the first optical detection is used for detecting that the main receiving optical path is abnormal, the second optical detection is used for detecting that the standby optical signal is normal, the control unit is used for controlling the third optical switch to be switched to the standby optical path, meanwhile, the control unit is used for controlling the first optical switch to be switched off, so that the communication equipment works in the standby path, and when the first optical detection is used for detecting that the main receiving optical path is abnormal, and when the second optical detection is used for detecting that the standby optical path is abnormal, the first optical switch, the second optical switch and the third optical switch are kept unchanged.
The second type of the optical signal switching device comprises an optical signal of a receiving optical path corresponding to the first optical detection and the second optical detection real-time monitor when the communication equipment works in a standby path, when the first optical detection detects that the light of a main receiving optical path is normal or abnormal, the second optical detector detects that the light of the standby optical path is normal, the first optical switch, the second optical switch and the third optical switch are kept unchanged, when the first optical detection detects that the light of the main receiving optical path is normal, the second optical detector detects that the light of the standby optical signal is abnormal, the control unit is used for controlling the third optical switch to be switched to the main receiving optical path, and meanwhile, the control unit is used for controlling the second optical switch to be switched off, so that the communication equipment works in the main path, and when the first optical detector detects that the light of the main receiving optical path is abnormal, and when the second optical detector detects that the standby optical path is abnormal, the first optical switch, the second optical switch and the third optical switch are kept unchanged.
Wherein, a specific workflow diagram when the detector detects signals is shown in fig. 8.
Step 201: when the equipment works in a main path, when the first optical detector detects that the optical signal is abnormal and the second optical detector detects that the optical signal is normal, the control unit controls the first optical switch to be disconnected, controls the second optical switch to be connected, and controls the third optical switch to be switched to a standby path for connection.
When the first optical detector detects that the main receiving optical signal from the opposite-side communication device at the main receiving end is abnormal, and the second optical detector detects that the standby receiving optical signal from the opposite-side communication device at the standby receiving end is normal, the control unit controls the three optical switches to perform different operations according to the detection results of the first optical detector and the second optical detector (see embodiment 1 in detail), so that the communication device is switched from the main path to the standby path, which is not repeated here.
Step 202: when the equipment works in a standby path, when the second optical detector detects that the optical signal is abnormal and the first optical detector detects that the optical signal is normal, the control unit controls the second optical switch to be disconnected, controls the first optical switch to be connected, and controls the third optical switch to be switched to a main path for connection.
Because the main path and the standby path are not fundamentally different, when the second optical detector detects that the standby receiving end is abnormal from the standby receiving optical signal of the opposite-side communication device when the communication device works on the standby path, the control unit controls the three optical switches to perform different operations according to the detection results of the first optical detector and the second optical detector (see embodiment 1 specifically), so that the communication device can be switched from the standby path to the main path, and the details are not repeated here.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. A communications device for source-sink synchronous switching, comprising: the optical system comprises a control unit, a first optical detector, a second optical detector, a first optical switch, a second optical switch, a third optical switch and an optical splitter;
the public end of the optical splitter is used for connecting the signal sending end of the service device, and the first optical switch and the second optical switch are respectively arranged on two paths split by the optical splitter;
the third optical switch is connected to an optical path transmitted by an optical signal sent by the opposite-side communication equipment, and the public end of the third optical switch is used for being connected with a signal receiving end of the service device;
the control unit is respectively connected with the first optical switch, the second optical switch, the third optical switch, the first optical detector and the second optical detector;
the optical splitter is used for splitting an optical signal from the service device into two paths of optical signals so as to send the optical signals to opposite-side communication equipment through the first optical switch and the second optical switch;
The first optical detector is used for detecting a first optical signal from the opposite-side communication device on the main circuit, and the second optical detector is used for detecting a second optical signal from the opposite-side communication device on the standby circuit;
the control unit is used for controlling the first optical switch, the second optical switch and the third optical switch according to detection results of the first optical detector and the second optical detector so as to control the communication equipment to work in a main path or a standby path.
2. The source-sink synchronous switched communication device according to claim 1, wherein the main path includes a main transmission optical path and a main reception optical path, the standby path includes a standby transmission optical path and a standby reception optical path, the first optical switch is disposed on the main transmission optical path, and the second optical switch is disposed on the standby transmission optical path;
the first optical detector is used for detecting the size of an optical signal on a main receiving optical path, the second optical detector is used for detecting the size of an optical signal on a standby receiving optical path, the control unit is used for controlling the conduction states of the first optical switch and the second optical switch according to the detection result of the first optical detector and the detection result of the second optical detector, and the control unit is also used for controlling the conduction condition of the third optical switch according to the detection result of the first optical detector and the detection result of the second optical detector so as to select one path of signal to output to a service device.
3. The source-sink synchronous switching communication device according to claim 1, wherein in a primary-standby switching process, when the third optical switch is switched from a standby receiving optical path to a primary receiving optical path, a primary transmitting optical path where the first optical switch is located is synchronously turned on, and a standby transmitting optical path where the second optical switch is located is synchronously turned off;
when the third optical switch is switched from the main receiving optical path to the standby receiving optical path, the main receiving optical path where the first optical switch is located is synchronously closed, and the standby transmitting optical path where the second optical switch is located is synchronously turned on.
4. The communication device for synchronously switching source and destination according to claim 1, wherein in an initial state, both the main circuit and the standby circuit are good, the first optical switch and the second optical switch are in a conducting state, the third optical switch receives an optical signal from the main circuit or the standby circuit, and the control unit is used for controlling the states of the corresponding optical switches according to the optical signal detection result and ensuring that the source and destination work in the main circuit or the standby circuit simultaneously;
when the communication equipment works in a main way, the first optical detector and the second optical detector monitor the optical signals of the corresponding receiving optical paths in real time, and when the first optical detector detects that the optical signals of the main receiving optical path are normal and the second optical detector detects that the optical signals of the spare receiving optical path are normal, the first optical switch, the second optical switch and the third optical switch are kept unchanged;
When the first optical detector detects that the optical signal of the main receiving optical path is abnormal and the second optical detector detects that the optical signal of the standby receiving optical path is normal, the control unit is used for controlling the third optical switch to the standby receiving optical path, meanwhile, the control unit is used for controlling the first optical switch to be disconnected, and the second optical switch is kept unchanged, so that the communication equipment works in the standby path.
5. The communication device for synchronously switching source and destination according to claim 1, wherein in an initial state, both the main circuit and the standby circuit are good, the first optical switch and the second optical switch are in a conducting state, the third optical switch receives an optical signal from the main circuit or the standby circuit, and the control unit is used for controlling the states of the corresponding optical switches according to the optical signal detection result and ensuring that the source and destination work in the main circuit or the standby circuit simultaneously;
after the communication equipment is switched to a standby path, the first optical detector and the second optical detector monitor the optical signals of the corresponding receiving optical paths in real time, and when the first optical detector detects that the optical signals of the main receiving optical path are normal and the second optical detector detects that the optical signals of the standby receiving optical path are normal, the first optical switch, the second optical switch and the third optical switch are kept unchanged;
When the first optical detector detects that the optical signal of the main receiving optical path is normal and the second optical detector detects that the optical signal of the standby receiving optical path is abnormal, the control unit is used for controlling the third optical switch to the main receiving optical path, and meanwhile, the control unit is used for controlling the second optical switch to be disconnected and controlling the first optical switch to work on the main sending optical path so as to enable the communication equipment to work on the main path.
6. The communications device of source-sink synchronous switching according to claim 1, wherein the communications device is capable of link recovery:
after the line fault is recovered, a first optical switch and/or a second optical switch of the communication equipment at the side are/is opened according to a fault recovery command to open a transmitting port of the communication equipment at the side, wherein after the opposite side communication equipment detects a corresponding optical signal, an optical transmitting link of the opposite side communication equipment is opened, and after the optical signal is received by a detector of the communication equipment at the side, a control unit controls the third optical switch to work on a main path or a standby path according to the optical signal so as to recover the link;
or under the condition that the first optical detector and the second optical detector do not receive light, periodically or randomly opening a transmitting port of the communication equipment on the side so as to realize automatic recovery of a link.
7. An optical line protection method for source-sink synchronous switching, wherein the protection method is applied to the communication device as claimed in any one of claims 1 to 6, and comprises the following steps:
the optical splitter splits an optical signal from a service device into two paths of optical signals to transmit the optical signals to opposite-side communication equipment through the first optical switch and the second optical switch;
the first optical detector detects a first optical signal from the opposite side communication device on the main path, and the second optical detector detects a second optical signal from the opposite side communication device on the standby path;
the control unit controls the first optical switch, the second optical switch and the third optical switch according to detection results of the first optical detector and the second optical detector so as to control the communication equipment to work in a main path or a standby path.
8. The method for protecting an optical line by synchronously switching between a source and a destination according to claim 7, wherein in an initial state, both the main circuit and the standby circuit are good, the first optical switch and the second optical switch are in a conducting state, the third optical switch receives an optical signal from the main circuit or the standby circuit, and the control unit is used for controlling the states of the corresponding optical switches according to the optical signal detection result and ensuring that the source and the destination work in the main circuit or the standby circuit simultaneously;
The control unit controls the first optical switch, the second optical switch and the third optical switch according to detection results of the first optical detector and the second optical detector so as to control the communication equipment to work in a main path or a standby path, and the control unit comprises:
when the communication equipment works in a main path, the first optical detection and the second optical detection are used for detecting optical signals of a receiving optical path corresponding to the real-time monitor;
when the first optical detection detects that the main receiving path light is normal and the second optical detector detects that the standby path light signal is normal, the first optical switch, the second optical switch and the third optical switch are kept unchanged;
when the first optical detection detects that the light of the main receiving path is abnormal and the second optical detector detects that the standby path light signal is normal, the control unit controls the third optical switch to be switched to the standby receiving path, meanwhile, the control unit controls the first optical switch to be switched off, and the second optical switch is kept unchanged, so that the communication equipment works in the standby path.
9. The method for protecting an optical line by synchronously switching between a source and a destination according to claim 7, wherein in an initial state, both the main circuit and the standby circuit are good, the first optical switch and the second optical switch are in a conducting state, the third optical switch receives an optical signal from the main circuit or the standby circuit, and the control unit is used for controlling the states of the corresponding optical switches according to the optical signal detection result and ensuring that the source and the destination work in the main circuit or the standby circuit simultaneously;
The control unit controls the first optical switch, the second optical switch and the third optical switch according to the detection results of the first optical detector and the second optical detector so as to control the communication equipment to work in a main path or a standby path, and the control unit further comprises:
after the communication equipment is switched to a standby path, the first optical detection and the second optical detection are used for detecting optical signals of the receiving optical paths corresponding to the real-time monitors;
when the first optical detection detects that the main receiving path light is normal and the second optical detector detects that the standby path light signal is normal, the first optical switch, the second optical switch and the third optical switch are kept unchanged;
when the first optical detection detects that the light of the main receiving path is normal and the second optical detector detects that the optical signal of the standby path is abnormal, the control unit is used for controlling the third optical switch to the main receiving path, and meanwhile, the control unit is used for controlling the second optical switch to be disconnected and controlling the first optical switch to work in the main sending path so that the communication equipment works in the main path.
10. The method for protecting an optical line by synchronously switching sources and sinks according to claim 7, wherein the control unit controls the first optical switch, the second optical switch and the third optical switch according to detection results of the first optical detector and the second optical detector to control whether the communication device works in a main path or a standby path, specifically:
When the first optical detector detects that the optical signal is abnormal and the second optical detector detects that the optical signal is normal, the control unit controls the first optical switch to be disconnected, controls the second optical switch to be connected, and controls the third optical switch to be switched to be connected with a standby path;
when the second optical detector detects that the optical signal is abnormal and the first optical detector detects that the optical signal is normal, the control unit controls the second optical switch to be disconnected, controls the first optical switch to be connected, and controls the third optical switch to be switched to be connected with a main path.
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| CN202310663163.7A CN116566478A (en) | 2023-06-05 | 2023-06-05 | Communication equipment for source-sink synchronous switching and optical line protection method |
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| CN202310663163.7A CN116566478A (en) | 2023-06-05 | 2023-06-05 | Communication equipment for source-sink synchronous switching and optical line protection method |
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