CN115603802B - Time-frequency reference equipment, fault positioning method thereof and optical fiber ring network recovery method - Google Patents
Time-frequency reference equipment, fault positioning method thereof and optical fiber ring network recovery method Download PDFInfo
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- CN115603802B CN115603802B CN202211512658.1A CN202211512658A CN115603802B CN 115603802 B CN115603802 B CN 115603802B CN 202211512658 A CN202211512658 A CN 202211512658A CN 115603802 B CN115603802 B CN 115603802B
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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
- H04B10/032—Arrangements for fault recovery using working and protection systems
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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
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0791—Fault location on the transmission path
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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
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
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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
- H04B10/27—Arrangements for networking
- H04B10/275—Ring-type networks
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Abstract
The invention relates to the technical field of network time service, in particular to time-frequency reference equipment, a fault positioning method thereof and an optical fiber ring network recovery method, which comprise 1 host node and N extension nodes, wherein the host node and any extension node are communicated in the optical fiber ring network through transmission communication messages, the communication period is T0, the extension nodes finish the fault judgment of the nodes and the recovery of the optical fiber ring network, and the host node finishes the summarization of all fault node information. When a multi-node link in the optical fiber ring network of the optical fiber frequency reference equipment fails, particularly when the multi-node link fails simultaneously, the method can accurately and timely locate the multi-node link failure and move the failed node out of the optical fiber ring network link, so that the optical fiber ring network can still ensure that other nodes can keep normal work to the maximum extent when the multi-node fails, and the reliability of the operation of the optical fiber frequency reference equipment based on the optical fiber ring network framework can be improved to a greater extent.
Description
Technical Field
The invention relates to the technical field of network time service, in particular to time-frequency reference equipment, a fault positioning method thereof and an optical fiber ring network recovery method.
Background
At present, time-frequency reference equipment based on an optical fiber ring network framework comprises a host node and extension nodes, wherein the host node and the extension nodes are communicated through an optical fiber ring network, once a plurality of extension node links are in fault, particularly when faults occur simultaneously, if the faults can not be accurately positioned and recovered, the optical fiber ring network is disconnected and split into a plurality of discontinuous nodes, the optical fiber ring network falls into a paralysis failure state, and high-precision standard time-frequency output can not be guaranteed.
Disclosure of Invention
In view of this, the present invention provides a method for locating and recovering a multi-node link failure of a time-frequency reference device based on an optical fiber ring network architecture, and the method has the advantages of easy implementation, high accuracy of failure location, and the like.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention provides time-frequency reference equipment, which comprises 1 host node and N extension nodes, wherein the host node and any one of the extension nodes are communicated in an optical fiber ring network through transmission communication messages, the communication period is T0, the extension nodes finish the fault judgment of the nodes and the recovery of the optical fiber ring network, and the host node finishes the collection of all fault node information.
The optical switch module is configured on the extension node, and the extension node is connected with and removed from the optical fiber ring network by switching off and switching on the optical switch module.
The invention also provides a fault positioning method, which is applied to the time-frequency reference equipment and comprises the following steps:
the method comprises the following steps:
s100, the host node is started normally after being started, and a timer T1 is started, wherein T1 meets the following conditions: t1=3 × T0, and executing S200 when the timer T1 times out;
s200, judging whether the communication message of each extension node link is received within the time of the timer T1, if the communication message is received, the node link is normal, otherwise the node link is in failure, judging the conditions of all extension node links, giving summary information, counting and clearing the timer T1, ending the judging process, and returning to repeat the S100.
The invention also provides an optical fiber ring network recovery method, which is applied to the time-frequency reference equipment and comprises the following steps:
s1, starting an extension node, judging an initial state, and executing a step S2 if the initial state is normal;
s2, starting an extension node timer T2, wherein the T2 is a fixed time timer, judging whether an extension node link can continuously receive a host node communication message within the time of the timer T2 until the timer T2 finishes, judging whether the extension node link can continuously receive the host node communication message if the extension node link receives the communication message, resetting the timer T2, returning to repeatedly execute the S2, and executing the step S3 if the extension node link cannot receive the communication message;
s3, starting a timer T3, wherein the T3 is a fixed time timer, and executing S4;
s4, judging whether the timer T3 is up, if not, executing S5, and if so, executing S8;
s5, starting a timer T4, wherein the T4 is a pseudo-random timer, turning off an optical switch module in the node within the time of the timer T4, waiting for the timer T4 to count time, resetting the timer T4, and executing the step S6;
s6, judging whether the timer T3 is up, if not, executing S7, and if so, executing S8; s7, starting a timer T5 associated with the timer T4, wherein the T5 is a fixed time timer, starting an optical switch module in a node, continuously judging whether the extension node can receive the optical fiber ring network communication message or not until the timer T5 finishes within the time of the timer T5, resetting the timer T5 if the extension node cannot receive the optical fiber ring network communication message, returning to the step S4, judging that the link of the node is normal if the extension node can receive the optical fiber ring network communication message, resetting the timer T3 and the timer T5, and returning to the step S2;
and S8, resetting the timer T3, judging whether the host communication message is received within the time of the timer T3, if the host communication message cannot be received, turning off the optical switch module in the node, and finishing the operation.
And starting a timer T6, wherein the timer T6 is a fixed time timer, starting the optical switch module in the node, continuously judging whether a host node communication message is received within the time of the timer T6, if the host node communication message is received, the host node communication message is in a normal state in the initial state of the extension node, and if the host node communication message cannot be received, turning off the optical switch module in the node, and ending the operation.
Step S8, judging whether the host communication message is received within the time of the timer T3, and if the host communication message can be received, executing step S9; and S9, judging that the node link is normal, returning to repeatedly execute S2, and clearing the timer T3 and the timer T5.
The timer T3 satisfies: t3=3N × T0, where N is the total number of extension nodes.
The timer T4 satisfies: t4= i T0, where i is a pseudo random number 0~M, i and M are integers, and M < N.
The timer T5 satisfies: t5= (M-i) × T0.
The timer T6 satisfies: t6=3n × T0.
The invention has the beneficial effects that:
when a multi-node link in the optical fiber ring network of the optical fiber frequency reference equipment fails, particularly when the multi-node link fails simultaneously, the method can accurately and timely locate the multi-node link failure and move the failed node out of the optical fiber ring network link, so that the optical fiber ring network can still ensure that other nodes can keep normal work to the maximum extent when the multi-node fails, and the reliability of the operation of the optical fiber frequency reference equipment based on the optical fiber ring network framework can be improved to a greater extent.
Drawings
Fig. 1 is a schematic diagram of a host computer node optical fiber ring network in the embodiment of the present invention.
Fig. 2 is a schematic flow chart of a host node fault location processing procedure in the embodiment of the present invention.
Fig. 3 is a schematic flow chart of a fault location and recovery processing process of extension nodes in the embodiment of the present invention.
FIG. 4 is a schematic diagram illustrating the effect of fault location and optical fiber ring network restoration for a multi-node link according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the embodiment of the present invention includes 1 host node and 7 extension nodes, where the host node and the extension nodes form a ring network through optical fibers, and a communication period of the host node and the extension nodes is 50ms. In this embodiment, taking the case where node link failures occur in extension 1, extension 3, extension 5, and extension 7 at the same time, the method specifically includes the following steps:
as shown in fig. 2, the host node fault location method includes the following steps:
s100, starting a host node normally after starting up, starting a timer T1, timing for 150ms, waiting for the timer T1 to time up, and executing S200;
s200, judging whether a communication message of a certain extension node is received within T1 time, if the communication message is received, considering that a node link is normal, otherwise, considering that the node link has a fault, judging the conditions of all extension node links, and giving summary information;
and (5) clearing the count of the timer T1, finishing the judging process, and returning to repeatedly execute the step S100.
The above steps complete the positioning work of the node link failure.
As shown in fig. 3, the extension node fault location and recovery method specifically includes the following steps:
s1, starting an extension node to work, starting a timer T6, timing for 1.05S, starting an optical switch module in the node, continuously judging whether a host node communication message is received or not within the time of the timer T6, if the communication message is received, judging that the extension node is in a normal initial state, executing a step S2, if the communication message cannot be received, turning off the optical switch module in the node, and finishing the operation;
s2, starting a timer T2, timing for 150ms, judging whether an extension node can continuously receive a host node communication message until the timer T2 finishes judging whether the extension node can continuously receive the host node communication message, if so, judging that a node link is normal, resetting the timer T2, returning to repeatedly execute S2, and if not, executing the step S3;
s3, starting a timer T3, timing for 1.05s, and checking the state of the optical fiber ring network by switching off and switching on an optical switch module in the node;
s4, judging whether the time counting of 1.05S by the timer T3 is finished or not, if so, executing the step S8, otherwise, executing the step S5;
s5, starting a timer T4, turning off the optical switch module in the node within the time of T4, waiting for the timer T3 to count time, and resetting the timer;
s6, judging whether the time counting of 1.05S by the timer T3 is finished or not, if so, executing a step S8, otherwise, executing a step S7;
s7, starting a timer T5 associated with the timer T4, starting an optical switch module in the node, continuously judging whether the extension node can receive the optical fiber ring network communication message or not until the timer T5 finishes within the time of the timer T5, if so, judging that the node link is normal, enabling the optical switch module in the node to be in an open state, resetting the timer T3 and the timer T5, returning to the step S2, and if not, resetting the timer T5, and returning to the step S4;
s8, resetting the timer T3, judging that the node link is normal within 1.05S of the starting time of the timer T3 within the fixed time, judging that the node link is normal if a host node communication message is received, enabling the optical switch module in the node to be in an open state, resetting the timer T3 and the timer T5, and returning to the step S2; otherwise, the node link is judged to be in fault, the optical switch module in the node is in a turn-off state, and then the fault node is moved out of the optical fiber ring network, so that the optical fiber ring network is recovered to be normal.
In the embodiment, T1, T2, T3, T5, and T6 are fixed time timers, and T4 is a pseudo random timer.
After fault location and recovery of the host node and the extension node, the optical fiber ring network effect is as shown in fig. 4.
When a multi-node link in the optical fiber ring network of the optical fiber frequency reference equipment fails, particularly when the multi-node link fails simultaneously, the fault locating and recovering method can accurately and timely locate the multi-node link fault and move the fault node out of the optical fiber ring network link, so that the optical fiber ring network can still ensure that other nodes can keep normal work to the maximum extent when the multi-node fails, and the reliability of the operation of the optical fiber ring network framework-based time frequency reference equipment can be improved to a greater extent.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A recovery method of an optical fiber ring network is applied to time-frequency reference equipment, the time-frequency reference equipment comprises 1 host node and N extension nodes, the host node and any extension node are communicated in the optical fiber ring network through transmission communication messages, the communication period is T0, the extension node completes fault judgment of the node and recovery of the optical fiber ring network, the host node completes summary of all fault node information, the extension node is provided with an optical switch module, and the extension node is added into and removed from the optical fiber ring network through turning off and turning on the optical switch module, and the recovery method is characterized by comprising the following steps:
s1, starting an extension node, judging an initial state, and executing a step S2 if the initial state is normal;
s2, starting an extension node timer T2, wherein the T2 is a fixed time timer, judging whether an extension node link can continuously receive a host node communication message within the time of the timer T2 until the timer T2 finishes, judging whether the extension node link can continuously receive the host node communication message if the extension node link receives the communication message, resetting the timer T2, returning to repeatedly execute the S2, and executing the step S3 if the extension node link cannot receive the communication message;
s3, starting a timer T3, wherein the T3 is a fixed time timer, and executing S4;
s4, judging whether the timer T3 is up, if not, executing S5, and if so, executing S8;
s5, starting a timer T4, wherein the T4 is a pseudo-random timer, turning off an optical switch module in the node within the time of the timer T4, waiting for the timer T4 to count time, resetting the timer T4, and executing the step S6;
s6, judging whether the timer T3 is up, if not, executing S7, and if so, executing S8; s7, a timer T5 related to the timer T4 is started, the timer T5 is a fixed-time timer, an optical switch module in the node is started, in the time of the timer T5, whether the extension node can receive the optical fiber ring network communication message or not is continuously judged until the timer T5 is finished, if the extension node cannot receive the optical fiber ring network communication message, the timer T5 is reset, the step S4 is returned, if the extension node can receive the optical fiber ring network communication message, the node link is judged to be normal, the timer T3 and the timer T5 are reset, and the step S2 is returned;
and S8, resetting the timer T3, judging whether the host communication message is received within the time of the timer T3, if the host communication message cannot be received, turning off the optical switch module in the node, and finishing the operation.
2. The optical fiber ring network restoration method according to claim 1, wherein the method for judging the initial state in step S1 is as follows: and starting a timer T6, wherein the timer T6 is a fixed time timer, starting the optical switch module in the node, continuously judging whether a host node communication message is received within the time of the timer T6, if the host node communication message is received, the host node communication message is in a normal state in the initial state of the extension node, and if the host node communication message cannot be received, turning off the optical switch module in the node, and ending the operation.
3. The optical fiber ring network restoration method according to claim 1, wherein step S8 determines whether the host communication message is received within time of the timer T3, and if so, step S9 is executed;
and S9, judging that the node link is normal, returning to repeatedly execute S2, and clearing the timer T3 and the timer T5.
4. The optical fiber ring network restoration method according to any one of claims 1 to 3, wherein the timer T3 satisfies: t3=3n × T0, where N is the total number of extension nodes.
5. The optical fiber ring network restoration method according to any one of claims 1 to 3, wherein the timer T4 satisfies: t4= i T0, where i is a pseudo random number 0~M, i and M are integers, and M < N.
6. The optical fiber ring network restoration method according to any one of claims 1 to 3, wherein the timer T5 satisfies: t5= (M-i) × T0.
7. The optical fiber ring network restoration method according to claim 2, wherein the timer T6 satisfies: t6=3n × T0.
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| CN101631035A (en) * | 2008-07-14 | 2010-01-20 | 中兴通讯股份有限公司 | Method for protecting Ethernet double-return connection |
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| CN107026780B (en) * | 2017-04-14 | 2020-04-17 | 云南电网有限责任公司电力科学研究院 | Distribution optical fiber ring network fault point positioning method and system based on Internet of things |
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| CN1492623A (en) * | 2002-10-22 | 2004-04-28 | 华为技术有限公司 | Method for realizing link state feed-through in network |
| CN1753324A (en) * | 2004-09-21 | 2006-03-29 | 华为技术有限公司 | Method of implementing M:N protection in communication network and its network node device |
| WO2013049981A1 (en) * | 2011-10-08 | 2013-04-11 | 中兴通讯股份有限公司 | Hybrid ring network protection method and system based on shared path |
| CN111817940A (en) * | 2020-09-11 | 2020-10-23 | 之江实验室 | Industrial control ring network system, ring network control protocol and implementation method thereof |
| CN112260760A (en) * | 2020-10-19 | 2021-01-22 | 中国核动力研究设计院 | Nuclear power plant distributed control system field bus system based on optical loop |
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