CN112134716B - Method for determining fault position and controller - Google Patents
Method for determining fault position and controller Download PDFInfo
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- CN112134716B CN112134716B CN201910551378.3A CN201910551378A CN112134716B CN 112134716 B CN112134716 B CN 112134716B CN 201910551378 A CN201910551378 A CN 201910551378A CN 112134716 B CN112134716 B CN 112134716B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
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- H04L41/0677—Localisation of faults
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Abstract
The embodiment of the invention discloses a method for determining a fault position and a controller, wherein one of the methods comprises the following steps: when a transmission path fails, a controller receives first tag information sent by a host node on the transmission path; the first tag information is tag information detected by the sink node from a received first overhead signal, the first tag information comprises corresponding tag information added to the first overhead signal when the first overhead signal is transmitted by a first node of a normal link downstream from a nearest fault position of the sink node on the transmission path in the transmission direction from a source node to the sink node of the transmission path; determining a normal link corresponding to the first tag information; and taking links except for normal links corresponding to the first label information in all links on the transmission path as fault positions. In this way, the fault location can be determined immediately after the fault has occurred.
Description
Technical Field
Embodiments of the present invention relate to, but are not limited to, transport networks, and more particularly to a method and controller for determining the location of a fault.
Background
The transmission network (Transport Network) is a network system for transmitting information in a wide area, and can be classified into metropolitan area, interprovincial, international, intercontinental transmission networks, and the like, according to transmission distances; according to the type of the medium, the wireless transmission network can be classified into a wired transmission network and a wireless transmission network; depending on the specific technology used, the cable transport network may be further subdivided into OTN (optical transport network ), PTN (packet transport network, packet Transport Network), SDH (synchronous digital hierarchy ), etc., and the wireless transport network may be further subdivided into satellite transport network, microwave transport network, etc. With the development of the mobile internet and the rising of cloud application, as an infrastructure of the internet, a large number of various transmission networks are deployed in various countries in recent years in the global scope, the scale of the networks is rapidly increased, the transmission capacity is continuously expanded, and with the rapid increase of the scale and the capacity, the usability problem of the transmission network is also more prominent.
Because of the characteristics of cross-regional distribution, the external uncontrollable factors faced by the transmission network system are numerous, so that network interruption caused by various reasons is difficult to completely avoid, how to recover as soon as possible after interruption occurs is important, and the automatic recovery of faults through the protection and recovery functions provided by the intelligent control system becomes an important task for improving the network availability. The shorter the interrupt time, the lower the impact on the application. And determining the position of the fault is critical to the quick recovery of the service or the repair of the fault point.
In a transport network, traffic signals originate from a source node and arrive at a destination node via a transport path. Because a transmission network often spans a certain geographical range, a transmission path generally includes a certain number of intermediate nodes besides a source node and a destination node for amplifying or regenerating signals due to the requirements of signal add-drop and relay at different places. When the network is interrupted, the receiving end can sense the fault immediately because the integrity of the signal is damaged, but other information (such as link alarm information, link state routing protocol flooding message, etc.) is needed to determine the position of the network interruption, and the information is obtained by using a certain external condition (such as DCN (data communication network, data Communication Network) to work normally), and additional time (such as DCN route convergence time affected by the fault, and flooding Hong Shiyan of the routing protocol) is needed. In some cases (e.g., DCN damage results in some nodes going out of the pipe) it is even never possible to determine where the failure occurred.
Disclosure of Invention
In view of this, an embodiment of the present invention provides a method for determining a fault location, including:
When a transmission path fails, a controller receives first tag information sent by a host node on the transmission path;
the first tag information is tag information detected by the sink node from a received first overhead signal, the first tag information comprises corresponding tag information added to the first overhead signal when the first overhead signal is transmitted by a first node of a normal link downstream from a nearest fault position of the sink node on the transmission path in the transmission direction from a source node to the sink node of the transmission path;
determining a normal link corresponding to the first tag information;
and taking links except for normal links corresponding to the first label information in all links on the transmission path as fault positions.
The embodiment of the invention also provides a method for determining the fault position, which comprises the following steps:
when a transmission path fails and the transmission path is a bidirectional transmission path, a controller receives first tag information sent by a sink node on the transmission path; receiving third tag information sent by a source node on the transmission path;
the first tag information is tag information detected by the sink node from a received first overhead signal, the first tag information comprises corresponding tag information added to the first overhead signal when the first overhead signal is transmitted by a first node of a normal link downstream from a nearest fault position of the sink node on the transmission path in the transmission direction from a source node to the sink node of the transmission path;
The third tag information is tag information detected by the source node from the received third overhead signal, and the third tag information comprises corresponding tag information added to the third overhead signal when the third overhead signal is transmitted by a first node of a downstream normal link from a nearest fault position of the source node on the transmission path in the transmission direction from the sink node to the source node;
determining a normal link corresponding to the first tag information;
determining a normal link corresponding to the third tag information;
and taking links except for normal links corresponding to the first label information and the third label information in all links on the transmission path as fault positions.
The embodiment of the invention also provides a controller, which comprises:
a receiving unit, configured to receive first tag information sent by a sink node on a transmission path when the transmission path fails;
the first tag information is tag information detected by the sink node from a received first overhead signal, the first tag information comprises corresponding tag information added to the first overhead signal when the first overhead signal is transmitted by a first node of a normal link downstream from a nearest fault position of the sink node on the transmission path in the transmission direction from a source node to the sink node of the transmission path;
A determining unit, configured to determine a normal link corresponding to the first tag information; and taking links except for normal links corresponding to the first label information in all links on the transmission path as fault positions.
The embodiment of the invention also provides a controller, which comprises:
a receiving unit, configured to receive first tag information sent by a sink node on a transmission path when the transmission path fails and the transmission path is a bidirectional transmission path; receiving third tag information sent by a source node on the transmission path;
the first tag information is tag information detected by the sink node from a received first overhead signal, the first tag information comprises corresponding tag information added to the first overhead signal when the first overhead signal is transmitted by a first node of a normal link downstream from a nearest fault position of the sink node on the transmission path in the transmission direction from a source node to the sink node of the transmission path;
the third tag information is tag information detected by the source node from the received third overhead signal, and the third tag information comprises corresponding tag information added to the third overhead signal when the third overhead signal is transmitted by a first node of a downstream normal link from a nearest fault position of the source node on the transmission path in the transmission direction from the sink node to the source node;
A determining unit, configured to determine a normal link corresponding to the first tag information; determining a normal link corresponding to the third tag information; and taking links except for normal links corresponding to the first label information and the third label information in all links on the transmission path as fault positions.
The embodiment of the invention also provides a controller, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the computer program realizes the method for determining the fault position according to any one of the above when being executed by the processor
The embodiment of the invention also provides a computer readable storage medium, wherein the computer readable storage medium stores an information processing program, and the information processing program realizes the steps of the method for determining the fault position according to any one of the above steps when being executed by a processor.
Compared with the prior art, the technical scheme provided by the embodiment of the invention can immediately determine the fault position after the fault occurs.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate and do not limit the invention.
FIG. 1 is a flow chart of a method for determining a fault location according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for determining a fault location according to another embodiment of the present invention;
FIG. 3 is a flow chart of a method for determining a fault location according to another embodiment of the present invention;
FIG. 4 is a flow chart of a method for determining a fault location according to another embodiment of the present invention;
FIG. 5 is a flow chart of a method for determining a fault location according to another embodiment of the present invention;
FIG. 6 is a flow chart of a method for determining a fault location according to another embodiment of the present invention;
FIG. 7 is a schematic deployment diagram of a system for determining a fault location according to an embodiment of the present invention;
FIG. 8 is a schematic deployment diagram of a system for determining a fault location according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a controller according to an embodiment of the present invention;
Fig. 10 is a schematic structural diagram of a controller according to another embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be arbitrarily combined with each other.
The steps illustrated in the flowchart of the figures may be performed in a computer system, such as a set of computer-executable instructions. Also, while a logical order is depicted in the flowchart, in some cases, the steps depicted or described may be performed in a different order than presented herein.
In view of the problems of long time delay, insufficient reliability and the like existing in the current transmission network when the fault position is identified, the embodiment of the invention provides a method and a system for determining the fault position, which can immediately determine the fault occurrence position without depending on other external conditions and additional time delay while sensing service interruption.
Fig. 1 is a flow chart of a method for determining a fault location according to an embodiment of the present invention, as shown in fig. 1, the method includes:
the first tag information is tag information detected by the sink node from the received first overhead signal, and comprises corresponding tag information added to the first overhead signal when the first overhead signal is transmitted by a first node of a downstream normal link from a nearest fault position on the transmission path to the sink node in the transmission direction from the source node to the sink node of the transmission path;
and step 103, taking links except for normal links corresponding to the first label information in all links on the transmission path as fault positions.
Wherein, before the failure of the conveying path, the method further comprises:
receiving second tag information sent by a destination node;
the second tag information is the tag information detected by the sink node from the received second overhead signal, and the second tag information comprises the corresponding tag information added to the second overhead signal by the first node of the link transmitting the second overhead signal on the transmission path in the transmission direction from the source node to the sink node;
All link information on the transmission path is determined based on the second tag information.
Wherein the method further comprises:
receiving fourth tag information sent by an intermediate node on a transmission path;
the fourth tag information is the tag information detected in the signal transmitted by the intermediate node in the transmission direction from the source node to the sink node, and comprises the corresponding tag information added to the signal when the first node of the upstream normal link of the intermediate node transmits the signal in the transmission direction from the source node to the sink node;
determining a normal link corresponding to the fourth tag information;
and taking links except for normal links corresponding to the first label information and the fourth label information in all links on the transmission path as fault positions.
Fig. 2 is a flow chart of a method for determining a fault location according to another embodiment of the present invention, as shown in fig. 2, the method includes:
the first tag information is tag information detected by the sink node from the received first overhead signal, and comprises corresponding tag information added to the first overhead signal when the first overhead signal is transmitted by a first node of a downstream normal link from a nearest fault position on the transmission path to the sink node in the transmission direction from the source node to the sink node of the transmission path;
The third tag information is tag information detected by the source node from the received third overhead signal, and comprises corresponding tag information added to the third overhead signal when the third overhead signal is transmitted by a head node of a downstream normal link from a fault position closest to the source node on a transmission path in the transmission direction from the sink node to the source node;
and 203, taking links except for normal links corresponding to the first label information and the third label information in all links on the transmission path as fault positions.
Wherein, before the failure of the conveying path, the method further comprises:
receiving second label information sent by a sink node and sixth label information sent by a source node;
the second tag information is the tag information detected by the sink node from the received second overhead signal, and the second tag information comprises the corresponding tag information added to the second overhead signal by the first node of the link transmitting the second overhead signal on the transmission path in the transmission direction from the source node to the sink node; the sixth tag information is the tag information detected by the source node from the received sixth expense signal, and the sixth tag information comprises the corresponding tag information added to the sixth expense signal by the first node of the link transmitting the sixth expense signal on the transmission path in the transmission direction from the destination node to the source node;
All link information on the transmission path is determined based on the second tag information and the sixth tag information.
Wherein the method further comprises:
receiving fourth tag information and fifth tag information sent by an intermediate node on a transmission path;
the fourth tag information is the tag information detected in the signal transmitted by the intermediate node in the transmission direction from the source node to the sink node, and comprises the corresponding tag information added to the signal when the first node of the upstream normal link of the intermediate node transmits the signal in the transmission direction from the source node to the sink node;
the fifth tag information is tag information detected in a signal transmitted by the intermediate node in a transmission direction from the sink node to the source node, and the fifth tag information comprises corresponding tag information added to the signal by a head node of an upstream normal link of the intermediate node in the transmission direction from the sink node to the source node;
determining a normal link corresponding to the fifth tag information;
determining a normal link corresponding to the fourth tag information;
and taking links except for normal links corresponding to the first label information, the third label information, the fourth label information and the fifth label information in all links on the transmission path as fault positions.
FIG. 3 is a flow chart of a method for determining fault location according to another embodiment of the present invention,
in this embodiment, the transfer path is a unidirectional transfer path.
As shown in fig. 3, the method includes:
specifically, the nodes on one transmission path include a source node (i.e., a first node), a second node. The signal comprises two parts, one payload and the other overhead. The payload is generated from the source node and transmitted to the destination node without any change in the middle. Overhead begins with the source node, each of which is increasingly identified by itself, and thus increases. When one transmission path is normal, the second node may receive the payload and the overhead added with the source node identifier, the third node may receive the payload and the overhead added with the source node and the second node identifier, and so on. The path is an end-to-end concept and is formed by cascading a plurality of links, when a first section of link is interrupted, the second node can not receive the payload and the overhead containing the identification of the first node, but still adds the identification of the second node to the overhead, and the third node can not receive the payload and the overhead containing the identification of the first node, but can receive the overhead containing the identification of the second node, and so on.
Specifically, a label generator may be respectively disposed on a source node and an intermediate node on the transmission path, where the label generator is configured to generate label information of the home node, and combine the label information with the service signal to form a service signal containing a random label, and the label information carries specified characteristic information (i.e., label information) and is transmitted along with the service signal. The appointed characteristic information is information such as node identification, node position, generation time, node state parameters and the like. Here, "combining" refers to forming the tag information and the service signal into a channel-associated transmission mode, and the implementation mode includes, but is not limited to, space division, time division, frequency division or code division, and a combination of the above modes.
wherein the first tag information includes corresponding tag information added to the first overhead signal when transmitting the first overhead signal, from a source node to a sink node of the transmission path in a transmission direction of the source node to the sink node, a head node of a normal link downstream from a failure position closest to the sink node on the transmission path. In particular, a tag detector may be provided on the sink node for detecting the presence or absence of particular associated tag information (e.g., first tag information) from the traffic signal (e.g., first overhead signal) including the associated tag.
The label terminator can be set on the host node to separate and terminate the appointed label information from the service signal containing the associated label, and the service signal does not carry the appointed associated label information after passing through the label terminator.
Wherein, before the failure of the conveying path, the method further comprises:
the controller receives second label information sent by the host node;
the second tag information is the tag information detected by the sink node from the received second overhead signal, and the second tag information comprises the corresponding tag information added to the second overhead signal by the first node of the link transmitting the second overhead signal on the transmission path in the transmission direction from the source node to the sink node;
all link information on the transmission path is determined based on the second tag information.
In another embodiment, the transfer path is a unidirectional transfer path. On any one unidirectional transmission path, the deployment mode is as follows:
the label generator is deployed on each node on the transmission path except the destination node;
the label detector and the label terminator are deployed at the host node;
the controller is connected with the label detector of the host node and receives the output information of the label detector.
The working principle is as follows:
the label generator on the node generates label information of the node to form service signal label information containing the label information and service signal path transmission;
a label detector on the host node checks whether label information exists along with the road sign and sends the label information to the controller when the label information exists;
the label terminator on the host node separates the label information added by each node on the transmission path from the service signal, so that the service signal is restored to the state before the label information is added;
the controller receives the detection result of the tag detector, determines the fault position and instructs the relevant node to complete protection or recovery.
The specific process flow of the method in this embodiment is similar to steps 301-304, and will not be described here again.
Figure 4 is a flow chart of a method for determining fault location according to another embodiment of the present invention,
In this embodiment, the transfer path is a unidirectional transfer path.
As shown in fig. 4, the method includes:
wherein the fourth tag information includes corresponding tag information added to the signal at the time of transmitting the signal by a head node of an upstream normal link of the intermediate node in a transmission direction from the source node to the sink node.
Wherein a tag detector may be deployed at one or more intermediate nodes on the transmission path for detecting the presence or absence of particular associated tag information from the traffic signal containing the associated tag.
the first label information comprises corresponding label information which is added to the first overhead signal when the first overhead signal is transmitted by a first node of a downstream normal link from a fault position nearest to the sink node on the transmission path in the transmission direction from the source node to the sink node of the transmission path;
Specifically, the nodes on one transmission path include a source node (i.e., a first node), a second node. The signal comprises two parts, one payload and the other overhead. The payload is generated from the source node and transmitted to the destination node without any change in the middle. Overhead begins with the source node, each of which is increasingly identified by itself, and thus increases. When one transmission path is normal, the second node may receive the payload and the overhead added with the source node identifier, the third node may receive the payload and the overhead added with the source node and the second node identifier, and so on. The path is an end-to-end concept and is formed by cascading a plurality of links, when a first section of link is interrupted, the second node can not receive the payload and the overhead containing the identification of the first node, but still adds the identification of the second node to the overhead, and the third node can not receive the payload and the overhead containing the identification of the first node, but can receive the overhead containing the identification of the second node, and so on.
Specifically, a label generator may be respectively set on a source node and an intermediate node on the transmission path, where the label generator is used to generate label information of the home node, and combine with the service signal to form a service signal containing a random label, and the label information carries specified characteristic information and is transmitted along with the service signal. The appointed characteristic information is information such as node identification, node position, generation time, node state parameters and the like. Here, "combining" refers to forming the tag information and the service signal into a channel-associated transmission mode, and the implementation mode includes, but is not limited to, space division, time division, frequency division or code division, and a combination of the above modes.
In particular, a tag detector may be provided on the sink node for detecting the presence or absence of particular associated tag information (e.g., first tag information) from the traffic signal (e.g., first overhead signal) including the associated tag.
The label terminator can be set on the host node to separate and terminate the appointed label information from the service signal containing the associated label, and the service signal does not carry the appointed associated label information after passing through the label terminator.
Wherein, before the failure of the conveying path, the method further comprises:
the controller receives second label information sent by the host node;
the second tag information is the tag information detected by the sink node from the received second overhead signal, and the second tag information comprises the corresponding tag information added to the second overhead signal by the first node of the link transmitting the second overhead signal on the transmission path in the transmission direction from the source node to the sink node;
All link information on the transmission path is determined based on the second tag information. Specifically, a tag detector on the sink node is configured to detect the presence or absence of particular associated tag information (e.g., second tag information) from the traffic signal (e.g., second overhead signal) including the associated tag.
According to the technical scheme provided by the embodiment, the controller determines the fault position according to the fourth tag information and the first tag information, and compared with the method for determining the fault position according to the first tag information only, the fault positioning accuracy can be improved.
In this embodiment, according to the application scenario requirement, a plurality of tag detectors may be deployed at different network locations to meet the positioning requirement of higher accuracy.
In another embodiment, the transfer path is a unidirectional transfer path. On any one unidirectional transmission path, the deployment mode is as follows:
the label generator is deployed on each node on the transmission path except the destination node;
the label detector and the label terminator are deployed at the host node;
the tag detector is also deployed at one or more intermediate nodes;
the controller is connected with the label detector of the host node and the label detector of the intermediate node and receives the output information of the label detector.
The working principle is as follows:
The label generator on the node generates label information of the node to form a service signal containing the label information, and the label information and the service signal are transmitted along with the path;
a label detector on the intermediate node checks whether label information exists along with the road and sends the label information to the controller when the label information exists;
the label detector on the host node checks whether label information exists along with the road and sends the label information to the controller when the label information exists;
the label terminator on the host node separates the label information added by each node on the transmission path from the service signal, so that the service signal is restored to the state before the label information is added;
the controller receives the detection result of the tag detector, determines the fault position and instructs the relevant node to complete protection or recovery.
The specific process flow of the method in this embodiment is similar to steps 401-403, and will not be described here again.
Figure 5 is a flow chart of a method for determining fault location according to another embodiment of the present invention,
in this embodiment, the transmission path is a bidirectional transmission path.
As shown in fig. 5, the method includes:
Wherein the first tag information includes corresponding tag information added to the first overhead signal when transmitting the first overhead signal, from a source node to a sink node of the transmission path in a transmission direction of the source node to the sink node, a head node of a normal link downstream from a failure position closest to the sink node on the transmission path.
Specifically, the nodes on one transmission path include a source node (i.e., a first node), a second node. The signal comprises two parts, one payload and the other overhead. The payload is generated from the source node and transmitted to the destination node without any change in the middle. Overhead begins with the source node, each of which is increasingly identified by itself, and thus increases. When one transmission path is normal, the second node may receive the payload and the overhead added with the source node identifier, the third node may receive the payload and the overhead added with the source node and the second node identifier, and so on. The path is an end-to-end concept and is formed by cascading a plurality of links, when a first section of link is interrupted, the second node can not receive the payload and the overhead containing the identification of the first node, but still adds the identification of the second node to the overhead, and the third node can not receive the payload and the overhead containing the identification of the first node, but can receive the overhead containing the identification of the second node, and so on.
Specifically, a label generator may be respectively set on a source node and an intermediate node on the transmission path, where the label generator is used to generate label information of the home node, and combine with the service signal to form a service signal containing a random label, and the label information carries specified characteristic information and is transmitted along with the service signal. The appointed characteristic information is information such as node identification, node position, generation time, node state parameters and the like. Here, "combining" refers to forming the tag information and the service signal into a channel-associated transmission mode, and the implementation mode includes, but is not limited to, space division, time division, frequency division or code division, and a combination of the above modes.
In particular, a tag detector may be provided on the sink node for detecting the presence or absence of particular associated tag information (e.g., first tag information) from the traffic signal (e.g., first overhead signal) including the associated tag.
The label terminator can be set on the host node to separate and terminate the appointed label information from the service signal containing the associated label, and the service signal does not carry the appointed associated label information after passing through the label terminator.
The third tag information is tag information detected by the source node from the received third overhead signal, and the third tag information comprises corresponding tag information added to the third overhead signal when the third overhead signal is transmitted by a first node of a downstream normal link from a fault position closest to the source node on a transmission path in the transmission direction from the sink node to the source node;
in particular, a tag detector may be provided at the source node for detecting the presence or absence of specific associated tag information (e.g., third tag information) from the traffic signal (e.g., third overhead signal) including the associated tag.
The source node may further be provided with a tag terminator for separating and terminating the specified tag information (e.g., the third tag information) from the service signal (e.g., the third signal) containing the associated tag, where the service signal after passing through the tag terminator no longer carries the specified associated tag information.
Wherein, before the failure of the conveying path, the method further comprises:
the controller receives second label information sent by the sink node and sixth label information sent by the source node;
the first tag information is the tag information detected by the sink node from the received second overhead signal, the second tag information comprises the corresponding tag information added to the second overhead signal by the first node of the link transmitting the second overhead signal on the transmission path in the transmission direction from the source node to the sink node; the sixth tag information is the tag information detected by the source node from the received sixth expense signal, and the sixth tag information comprises the corresponding tag information added to the sixth expense signal by the first node of the link transmitting the sixth expense signal on the transmission path in the transmission direction from the destination node to the source node;
all link information on the transmission path is determined based on the second tag information and the sixth tag information.
According to the technical scheme provided by the embodiment, the controller determines the fault position according to the third tag information and the first tag information, and compared with the method for determining the fault position according to the first tag information only, the fault positioning accuracy can be improved.
In another embodiment, the transmission path is a bidirectional transmission path. On any bidirectional transmission path, the deployment mode is as follows:
The label generator is arranged on each node on the transmission path;
the label detector and the label terminator are deployed on the sink node and the source node;
the controller is connected with the label detector of the sink node and the label detector of the source node and receives the output information of the label detector.
The working principle is as follows:
the label generator on the node generates label information of the node to form a service signal containing the label information, and the label information and the service signal are transmitted along with the path;
the label detectors on the sink node and the source node check whether the label information exists along with the road sign, and the label information is sent to the controller when the label information exists;
the label terminator on the sink node and the source node separates the label information added by each node on the transmission path from the service signal, so that the service signal is restored to the state before the label information is added;
and the controller receives detection results of the label detectors on the sink node and the source node, determines the fault position and instructs the related node to complete protection or recovery.
The specific method flow in this embodiment is similar to steps 501-503, and will not be described here again.
FIG. 6 is a flow chart of a method for determining fault location according to another embodiment of the present invention,
in this embodiment, the transmission path is a bidirectional transmission path.
As shown in fig. 6, the method includes:
the fourth tag information is the tag information detected in the signal transmitted by the intermediate node in the transmission direction from the source node to the sink node, and the fourth tag information comprises the corresponding tag information added to the signal when the first node of the upstream normal link of the intermediate node transmits the signal in the transmission direction from the source node to the sink node;
in particular, a tag detector may be deployed on one or more intermediate nodes on the transmission path for detecting the presence or absence of particular associated tag information from the traffic signal containing the associated tag.
wherein the first tag information includes corresponding tag information added to the first overhead signal when transmitting the first overhead signal, from a source node to a sink node of the transmission path in a transmission direction of the source node to the sink node, a head node of a normal link downstream from a failure position closest to the sink node on the transmission path.
Specifically, a label generator may be respectively set on a source node and an intermediate node on the transmission path, where the label generator is used to generate label information of the home node, and combine with the service signal to form a service signal containing a random label, and the label information carries specified characteristic information and is transmitted along with the service signal. The appointed characteristic information is information such as node identification, node position, generation time, node state parameters and the like. Here, "combining" refers to forming the tag information and the service signal into a channel-associated transmission mode, and the implementation mode includes, but is not limited to, space division, time division, frequency division or code division, and a combination of the above modes.
In particular, a tag detector may be provided on the sink node for detecting the presence or absence of particular associated tag information (e.g., first tag information) from the traffic signal (e.g., first overhead signal) including the associated tag.
The label terminator can be set on the host node to separate and terminate the appointed label information from the service signal containing the associated label, and the service signal does not carry the appointed associated label information after passing through the label terminator.
Wherein the fifth tag information includes corresponding tag information added to the signal at the time of transmitting the signal by a head node of an upstream normal link of the intermediate node in a transmission direction from the sink node to the source node.
In particular, a tag detector may be deployed on one or more intermediate nodes on the transmission path for detecting the presence or absence of particular associated tag information from the traffic signal containing the associated tag.
the third tag information is tag information detected by the source node from the received third overhead signal, and the third tag information comprises corresponding tag information added to the third overhead signal when the third overhead signal is transmitted by a first node of a normal link downstream from a fault position closest to the source node on a transmission path in the transmission direction from the sink node to the source node.
In particular, a tag detector may be provided at the source node for detecting the presence or absence of specific associated tag information (e.g., third tag information) from the traffic signal (e.g., third overhead signal) including the associated tag.
The source node may further be provided with a tag terminator for separating and terminating the specified tag information (e.g., the third tag information) from the service signal (e.g., the third signal) containing the associated tag, where the service signal after passing through the tag terminator no longer carries the specified associated tag information.
Wherein, before the failure of the conveying path, the method further comprises:
the controller receives second label information sent by the sink node and sixth label information sent by the source node;
the first tag information is the tag information detected by the sink node from the received second overhead signal, the second tag information comprises the corresponding tag information added to the second overhead signal by the first node of the link transmitting the second overhead signal on the transmission path in the transmission direction from the source node to the sink node; the sixth tag information is the tag information detected by the source node from the received sixth expense signal, and the sixth tag information comprises the corresponding tag information added to the sixth expense signal by the first node of the link transmitting the sixth expense signal on the transmission path in the transmission direction from the destination node to the source node;
All link information on the transmission path is determined based on the second tag information and the sixth tag information.
According to the technical scheme provided by the embodiment, the controller determines the fault position according to the fifth tag information, the fourth tag information, the third tag information and the first tag information, and compared with the method that the controller determines the fault position only according to the first tag information or only according to the third tag information and the first tag information, the fault positioning accuracy can be improved.
In another embodiment, the transmission path is a bidirectional transmission path. On any bidirectional transmission path, the deployment mode is as follows:
the label generator is arranged on each node on the transmission path;
the label detector and the label terminator are deployed on the sink node and the source node;
the tag detector is also deployed at one or more intermediate nodes;
the controller is connected with the label detector of the sink node, the label detector of the source node and the label detector of the intermediate node, and receives the output information of the label detector.
The working principle is as follows:
the label generator on the node generates label information of the node to form a service signal containing the label information, and the label information and the service signal are transmitted along with the path;
the label detectors on the host node, the source node and the intermediate node check whether the label information exists along with the road sign and send the label information to the controller when the label information exists;
The label terminator on the sink node and the source node separates the label information added by each node on the transmission path from the service signal, so that the service signal is restored to the state before the label information is added;
and the controller receives detection results of the label detectors on the sink node, the source node and the intermediate node, determines the fault position and instructs the relevant nodes to complete protection or recovery.
The specific method flow in this embodiment is similar to steps 601-605 and will not be described here again.
In this embodiment, according to the application scenario requirement, a plurality of tag detectors may be deployed at different network locations to meet the positioning requirement of higher accuracy.
FIG. 7 is a schematic deployment diagram of a system for determining a fault location according to an embodiment of the present invention, as shown in FIG. 7, the system includes: an ODU (optical channel data unit ) bi-directional transmission path consisting of 6 nodes, wherein A, B, C, D, E nodes deploy label generators in a-F direction, and F nodes deploy label detectors and label terminators; the F, E, D, C, B node in the F-A direction deploys Sub>A label generator, and the A node deploys Sub>A label detector and Sub>A label terminator;
normally, the tag detector in the A-F direction can detect tag information from the A, B, C, D, E node, and the tag detector in the F-A direction can detect tag information from the F, E, D, C, B node; the controller may learn from the tag detector the list of nodes and links that the transmission path passes through.
As shown in fig. 8, when a bi-directional interrupt occurs between B-C, the tag detector in the a-F direction can only detect tag information from node C, D, E, and tag information from node A, B is truncated; the tag detector in the F-Sub>A direction can only detect tag information from node B, and the tag information from node F, E, D, C is truncated. The controller determines the location of the fault point by the change of the tag information detected by the bidirectional tag detector, for example, the tag detector on F detects the tag information from the C, D, E node, so the link between C, D, E, F is normal, the tag detector on a detects the tag information from the node B, so the link between A, B is normal, and the controller can determine the link between the fault locations B, C based on the fact that all links of the transmission path known before the fault occurs are A, B, C, D, E, F bidirectional.
In the above embodiment of the present invention, the signal transmitted on the transmission path may be an optical path payload unit overhead OPUk (Optical channel Payload Unit-k) signal, and the tag information is carried in two RES (reserved) fields of the OPUk (Optical channel Payload Unit-k) overhead. The tag information may be a node identification ID, a node location, a generation time, a node status parameter, and the like. For example, when the label information is a node ID, each node in the transport network is assigned a unique ID, and a maximum of 65536 nodes are allowed in two RES fields.
Fig. 9 is a schematic structural diagram of a controller according to an embodiment of the present invention, as shown in fig. 9, the controller includes:
a receiving unit, configured to receive first tag information sent by a sink node on a transmission path when the transmission path fails;
the first tag information is tag information detected by the sink node from the received first overhead signal, and comprises corresponding tag information added to the first overhead signal when the first overhead signal is transmitted by a first node of a downstream normal link from a nearest fault position on the transmission path to the sink node in the transmission direction from the source node to the sink node of the transmission path;
the determining unit is used for determining a normal link corresponding to the first tag information; and taking links except for normal links corresponding to the first label information in all links on the transmission path as fault positions.
The receiving unit is further used for receiving second tag information sent by the sink node before the transmission path fails;
the second tag information is the tag information detected by the sink node from the received second overhead signal, and the second tag information comprises the corresponding tag information added to the second overhead signal by the first node of the link transmitting the second overhead signal on the transmission path in the transmission direction from the source node to the sink node;
And the determining unit is also used for determining all link information on the transmission path according to the second label information.
The receiving unit is further used for receiving fourth tag information sent by the intermediate node on the transmission path;
the fourth tag information is the tag information detected in the signal transmitted by the intermediate node in the transmission direction from the source node to the sink node, and comprises the corresponding tag information added to the signal when the first node of the upstream normal link of the intermediate node transmits the signal in the transmission direction from the source node to the sink node;
the determining unit is further used for determining a normal link corresponding to the fourth tag information; and taking links except for normal links corresponding to the first label information and the fourth label information in all links on the transmission path as fault positions.
Fig. 10 is a schematic structural diagram of a controller according to another embodiment of the present invention, as shown in fig. 10, the controller includes:
a receiving unit, configured to receive first tag information sent by a sink node on a transmission path when the transmission path fails and the transmission path is a bidirectional transmission path; receiving third tag information sent by a source node on a transmission path;
The first tag information is tag information detected by the sink node from the received first overhead signal, and comprises corresponding tag information added to the first overhead signal when the first overhead signal is transmitted by a first node of a downstream normal link from a nearest fault position on the transmission path to the sink node in the transmission direction from the source node to the sink node of the transmission path;
the third tag information is tag information detected by the source node from the received third overhead signal, and comprises corresponding tag information added to the third overhead signal when the third overhead signal is transmitted by a head node of a downstream normal link from a fault position closest to the source node on a transmission path in the transmission direction from the sink node to the source node;
the determining unit is used for determining a normal link corresponding to the first tag information; determining a normal link corresponding to the third tag information; and taking links except for normal links corresponding to the first label information and the third label information in all links on the transmission path as fault positions.
The receiving unit is further used for receiving second tag information sent by the sink node and sixth tag information sent by the source node before the transmission path fails;
The second tag information is the tag information detected by the sink node from the received second overhead signal, and the second tag information comprises the corresponding tag information added to the second overhead signal by the first node of the link transmitting the second overhead signal on the transmission path in the transmission direction from the source node to the sink node; the sixth tag information is the tag information detected by the source node from the received sixth expense signal, and the sixth tag information comprises the corresponding tag information added to the sixth expense signal by the first node of the link transmitting the sixth expense signal on the transmission path in the transmission direction from the destination node to the source node;
and the determining unit is also used for determining all link information on the transmission path according to the second label information and the sixth label information.
The receiving unit is further used for receiving fourth tag information and fifth tag information sent by the intermediate node on the transmission path;
the fourth tag information is the tag information detected in the signal transmitted by the intermediate node in the transmission direction from the source node to the sink node, and comprises the corresponding tag information added to the signal when the first node of the upstream normal link of the intermediate node transmits the signal in the transmission direction from the source node to the sink node;
The fifth tag information is tag information detected in a signal transmitted by the intermediate node in a transmission direction from the sink node to the source node, and the fifth tag information comprises corresponding tag information added to the signal by a head node of an upstream normal link of the intermediate node in the transmission direction from the sink node to the source node;
the determining unit is further used for determining a normal link corresponding to the fifth tag information; determining a normal link corresponding to the fourth tag information; and taking links except for normal links corresponding to the first label information, the third label information, the fourth label information and the fifth label information in all links on the transmission path as fault positions.
The embodiment of the invention also provides a controller, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the computer program is executed by the processor to realize the method for determining the fault position by any one of the controller.
The embodiment of the invention also provides a computer readable storage medium, and an information processing program is stored on the computer readable storage medium, and when the information processing program is executed by a processor, the steps of any method for determining the fault position by the controller are realized.
In the above embodiment of the present invention, the label detector on the sink node may detect label information of all nodes on the path under normal conditions. When a fault occurs at a certain place, the label information of the node at the upstream of the fault point is cut off, and the label detector on the sink node can only detect the label information of each node at the downstream from the fault point; according to the output information of the tag detector, the controller can obtain a link where a fault point closest to the sink nodes at two ends is located; when the break point on the transmission path is one or two, the controller can determine the link where the fault point is located according to the output information of the tag detector on the bidirectional path; when the break points on the transmission path exceed two points, the controller can learn the links where two fault points closest to the source node and the sink node are located according to the output information of the label detector on the bidirectional path.
In the above-described embodiments of the present invention, multiple controllers may be deployed in a transport network, with cooperation between the controllers to accomplish more complex fault localization. One controller may be coupled to tag detectors on one or more nodes, with multiple controllers communicating with each other. In this way, the controller receives the detection results of one or more tag detectors located on the same or different nodes, and can interact with other controllers to acquire more information, thereby determining the fault position and issuing operation instructions to the relevant nodes when necessary, and completing service protection and recovery.
In the above-described embodiments of the present invention, the components of the tag generator, tag detector, tag terminator, and controller may be combined or separated. For example, the controllers may be deployed directly on the sink nodes, or interconnected controllers may be deployed at the source and sink nodes, respectively.
The embodiment of the invention also provides a sink node which belongs to the first transmission path and comprises a memory, a processor and a computer program which is stored in the memory and can run on the processor, wherein the computer program realizes the steps of the method for determining the fault position by any one of the sink nodes when being executed by the processor.
The embodiment of the invention also provides a source node which belongs to the first transmission path and comprises a memory, a processor and a computer program which is stored in the memory and can run on the processor, wherein the computer program realizes the steps of the method for determining the fault position by any one of the source node when being executed by the processor.
The embodiment of the invention also provides an intermediate node which belongs to the first transmission path and comprises a memory, a processor and a computer program which is stored in the memory and can run on the processor, wherein the computer program realizes the steps of the method for determining the fault position by any one of the intermediate node when being executed by the processor
The embodiment of the invention also provides a controller, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the computer program realizes the steps of the method for determining the fault position by any one of the controller when being executed by the processor.
The embodiment of the invention also provides a computer readable storage medium, and an information processing program is stored on the computer readable storage medium, and when the information processing program is executed by a processor, the steps of the method for determining the fault position by any one of the sink node, the intermediate node, the source node or the controller are realized.
According to the technical scheme provided by the embodiment of the invention, the fault position is determined by adding and detecting the label information of the following road, the fault occurrence position can be immediately determined while the service interruption is perceived, other external conditions are not relied on, no extra time delay is generated, and the defects that the fault position can be determined only by waiting for the link alarm or the route information to flood, the time delay is long and success cannot be ensured in the prior art are avoided; meanwhile, the invention does not influence the operation of the existing fault positioning technology, namely, the fault position can be positioned in a traditional mode while the fault position is determined by the technology, and the fault position can be used for verifying the result of the fault positioning technology, so that the positioning result is more reliable.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
Claims (8)
1. A method of determining a location of a fault, comprising:
when a transmission path fails, a controller receives first tag information sent by a host node on the transmission path;
the first tag information is tag information detected by the sink node from a received first overhead signal, the first tag information comprises corresponding tag information added to the first overhead signal when the first overhead signal is transmitted by a first node of a normal link downstream from a nearest fault position of the sink node on the transmission path in the transmission direction from a source node to the sink node of the transmission path;
determining a normal link corresponding to the first tag information;
receiving fourth tag information sent by an intermediate node on the transmission path;
the fourth tag information is tag information detected in a signal transmitted by the intermediate node in a transmission direction from the source node to the sink node, the fourth tag information comprises corresponding tag information added to the signal when the first node of an upstream normal link of the intermediate node transmits the signal in the transmission direction from the source node to the sink node;
determining a normal link corresponding to the fourth tag information;
And taking links except for normal links corresponding to the first label information and the fourth label information in all links on the transmission path as fault positions.
2. The method of claim 1, wherein prior to the failure of the transport path, the method further comprises:
receiving second label information sent by the sink node;
the second tag information is tag information detected by the sink node from the received second overhead signal, the second tag information comprises corresponding tag information added to the second overhead signal by a first node of a link transmitting the second overhead signal on the transmission path in the transmission direction from the source node to the sink node;
and determining all link information on the transmission path according to the second tag information.
3. A method of determining a location of a fault, comprising:
when a transmission path fails and the transmission path is a bidirectional transmission path, a controller receives first tag information sent by a sink node on the transmission path; receiving third tag information sent by a source node on the transmission path;
the first tag information is tag information detected by the sink node from a received first overhead signal, the first tag information comprises corresponding tag information added to the first overhead signal when the first overhead signal is transmitted by a first node of a normal link downstream from a nearest fault position of the sink node on the transmission path in the transmission direction from a source node to the sink node of the transmission path;
The third tag information is tag information detected by the source node from the received third overhead signal, and the third tag information comprises corresponding tag information added to the third overhead signal when the third overhead signal is transmitted by a first node of a downstream normal link from a nearest fault position of the source node on the transmission path in the transmission direction from the sink node to the source node;
determining a normal link corresponding to the first tag information;
determining a normal link corresponding to the third tag information;
receiving fourth tag information and fifth tag information sent by an intermediate node on the transmission path;
the fourth tag information is tag information detected in a signal transmitted by the intermediate node in a transmission direction from the source node to the sink node, the fourth tag information comprises corresponding tag information added to the signal when the first node of an upstream normal link of the intermediate node transmits the signal in the transmission direction from the source node to the sink node;
the fifth tag information is tag information detected in a signal transmitted by the intermediate node in a transmission direction from the sink node to the source node, the fifth tag information comprises corresponding tag information added to the signal when the first node of an upstream normal link of the intermediate node transmits the signal in the transmission direction from the sink node to the source node;
Determining a normal link corresponding to the fifth tag information;
determining a normal link corresponding to the fourth tag information;
and taking links except for normal links corresponding to the first label information, the third label information, the fourth label information and the fifth label information in all links on the transmission path as fault positions.
4. A method according to claim 3, characterized in that before the failure of the transport path, the method further comprises:
receiving second label information sent by the sink node and sixth label information sent by the source node;
the second tag information is tag information detected by the sink node from the received second overhead signal, the second tag information comprises corresponding tag information added to the second overhead signal by a first node of a link transmitting the second overhead signal on the transmission path in the transmission direction from the source node to the sink node; the sixth tag information is tag information detected by the source node from a received sixth expense signal, and the sixth tag information comprises corresponding tag information added to the sixth expense signal by a first node of a link transmitting the sixth expense signal on the transmission path in the transmission direction from the sink node to the source node;
And determining all link information on the transmission path according to the second tag information and the sixth tag information.
5. A controller, comprising:
a receiving unit, configured to receive, when a transmission path fails, first tag information sent by a sink node on the transmission path and fourth tag information sent by an intermediate node on the transmission path;
the first tag information is tag information detected by the sink node from a received first overhead signal, the first tag information comprises corresponding tag information added to the first overhead signal when the first overhead signal is transmitted by a first node of a normal link downstream from a nearest fault position of the sink node on the transmission path in the transmission direction from a source node to the sink node of the transmission path;
the fourth tag information is tag information detected in a signal transmitted by the intermediate node in a transmission direction from the source node to the sink node, the fourth tag information comprises corresponding tag information added to the signal when the first node of an upstream normal link of the intermediate node transmits the signal in the transmission direction from the source node to the sink node;
A determining unit, configured to determine a normal link corresponding to the first tag information; determining a normal link corresponding to the fourth tag information; and taking links except for normal links corresponding to the first label information and the fourth label information in all links on the transmission path as fault positions.
6. A controller, comprising:
a receiving unit, configured to receive first tag information sent by a sink node on a transmission path when the transmission path fails and the transmission path is a bidirectional transmission path; receiving third tag information sent by a source node on the transmission path; receiving fourth tag information and fifth tag information sent by an intermediate node on the transmission path;
the first tag information is tag information detected by the sink node from a received first overhead signal, the first tag information comprises corresponding tag information added to the first overhead signal when the first overhead signal is transmitted by a first node of a normal link downstream from a nearest fault position of the sink node on the transmission path in the transmission direction from a source node to the sink node of the transmission path;
The third tag information is tag information detected by the source node from the received third overhead signal, and the third tag information comprises corresponding tag information added to the third overhead signal when the third overhead signal is transmitted by a first node of a downstream normal link from a nearest fault position of the source node on the transmission path in the transmission direction from the sink node to the source node;
the fourth tag information is tag information detected in a signal transmitted by the intermediate node in a transmission direction from the source node to the sink node, the fourth tag information comprises corresponding tag information added to the signal when the first node of an upstream normal link of the intermediate node transmits the signal in the transmission direction from the source node to the sink node;
the fifth tag information is tag information detected in a signal transmitted by the intermediate node in a transmission direction from the sink node to the source node, the fifth tag information comprises corresponding tag information added to the signal when the first node of an upstream normal link of the intermediate node transmits the signal in the transmission direction from the sink node to the source node;
A determining unit, configured to determine a normal link corresponding to the first tag information; determining a normal link corresponding to the third tag information; determining a normal link corresponding to the fifth tag information; determining a normal link corresponding to the fourth tag information; and taking links except for normal links corresponding to the first label information, the third label information, the fourth label information and the fifth label information in all links on the transmission path as fault positions.
7. A controller comprising a memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor implements a method of determining the location of a fault as claimed in any one of claims 1 to 4.
8. A computer-readable storage medium, on which an information processing program is stored, which, when executed by a processor, implements the steps of the method of determining a fault location according to any one of claims 1 to 4.
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| PCT/CN2020/092245 WO2020259180A1 (en) | 2019-06-24 | 2020-05-26 | Method for determining fault position, and controller and storage medium |
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| US6496476B1 (en) * | 1997-03-12 | 2002-12-17 | Worldcom, Inc. | System and method for restricted reuse of intact portions of failed paths |
| CN1913485A (en) * | 2005-08-11 | 2007-02-14 | 中兴通讯股份有限公司 | Method of automatic detection topology, set-up route table and implementing narrow-band service |
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| CN101471821A (en) * | 2007-12-29 | 2009-07-01 | 华为技术有限公司 | Method and apparatus for detecting failure of operator backbone network transmission network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101986604B (en) * | 2010-10-29 | 2015-01-28 | 中兴通讯股份有限公司 | Link fault positioning method and system of packet transport network (PTN) |
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| US6496476B1 (en) * | 1997-03-12 | 2002-12-17 | Worldcom, Inc. | System and method for restricted reuse of intact portions of failed paths |
| US7401217B2 (en) * | 2003-08-12 | 2008-07-15 | Mitsubishi Electric Research Laboratories, Inc. | Secure routing protocol for an ad hoc network using one-way/one-time hash functions |
| CN1913485A (en) * | 2005-08-11 | 2007-02-14 | 中兴通讯股份有限公司 | Method of automatic detection topology, set-up route table and implementing narrow-band service |
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