CN101505240A - Fault detection method and apparatus - Google Patents
Fault detection method and apparatus Download PDFInfo
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- CN101505240A CN101505240A CNA2008100660843A CN200810066084A CN101505240A CN 101505240 A CN101505240 A CN 101505240A CN A2008100660843 A CNA2008100660843 A CN A2008100660843A CN 200810066084 A CN200810066084 A CN 200810066084A CN 101505240 A CN101505240 A CN 101505240A
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Abstract
The embodiment of the invention provides a method and device for detecting faults. The method comprises the following steps that: a test point sends a loop-back command to a net element in a service path, wherein the net element receiving the loop-back command performs loop-back on service data at an inlet port or an outlet port thereof; and the test point affirms the specific positions of fault points according to whether the received service date after the loop-back is normal, and if the specific positions of the fault points cannot be affirmed, the test point continues to send the loop-back command to the net element in the service path until the positions of the fault points are positioned according to the receiving condition of the loop-back service data. By applying the method and the device, the positions of the fault points in the network can be accurately positioned.
Description
Technical field
The present invention relates to the communications field, especially be relevant to the route computing technique in a kind of communication network.
Background technology
In communication network, regular meeting breaks down during network, and after fault in the network took place, how quick and precisely the fault location point was one of key request of O﹠M process.
In the prior art, the user is by webmaster or order line, and rule of thumb, by management plane the doubtful fault point in the network is manually issued one by one with the order of order line loopback, simultaneously by after observation, noting hair ring and return order, professional fine or not situation, the loopback order that issues is removed in the record back, result according to observing, recording carries out analysis and judgement, finally orients concrete fault point.
When business a plurality of territories of process or autonomous system AS, the order line of webmaster or access probably can not administer or land this business process all network elements (for example one professional through a plurality of vendor equipment, or a plurality of operators), the user will use a plurality of webmasters to insert a plurality of territories like this, could to business all network elements of process issue the loopback order.
The fault location time of prior art is long, complicated operation.Be difficult to satisfy the industry needs more and more higher to fault location.
It is complicated more to cause artificial in this case transmitting order to lower levels to carry out the fault location operation, and the time of orienting concrete fault will be longer.Simultaneously, sometimes, a user can not land all network elements and issue loopback order (for example the user can not administer some network element by webmaster or order line), causes the user to prefer the position and goes out the concrete fault point difficulty that becomes very.
Manually issue the mode fault location of loopback order, need through manually loopback order down, with manual record as a result, manually loopback is removed order down, these steps of fault point are oriented in manual analysis, complex operation, and location efficiency is low, it is long to locate the out of order time, thereby causes the Operation and Maintenance cost of fault location higher.
Loop fuction is a kind of test function that most equipment is all supported in the communication network, is the common method and the means of fault location.On the basis of existing loop fuction, how to utilize loop fuction quick and precisely fault location be to need the problem that solves.
Summary of the invention
Use the present invention, quick and precisely fault location particular location.
The embodiment of the invention provides a kind of fault detection method, comprising:
The network element of test point on service path sends the loopback order, wherein, receives that the network element of this loopback order carries out loopback at its inbound port or outbound port with business datum;
Whether test point is normal according to the business datum behind the loopback of receiving, confirm the particular location of fault point, if can't confirm, the network element that then continues in service path sends the loopback order, until orienting position of failure point according to the reception condition of loopback business datum.
The embodiment of the invention also provides a kind of fault detection method, and this method comprises:
Professional source node sends the downstream neighbor of loopback order to service path;
The node of receiving the loopback order carries out loopback at its input port or output port to business datum;
If source node can't be oriented the fault point according to the business datum of loopback, then return and the announcement of fault location point to give the up-to-date node that sends the loopback response message;
Receive can't fault location point the node of announcement, continue the order of structure loopback and give downstream neighbor;
After source node is received the business datum of loopback once more, if still can't the fault location position, then continue to return can't fault location point announcement to the up-to-date node that sends the loopback response message, until orienting position of failure point.
The embodiment of the invention also provides a kind of testing apparatus, and this method comprises:
Professional source node sends the downstream neighbor of loopback order to service path;
The node of receiving the loopback order carries out loopback at its input port or output port to business datum;
If source node can't be oriented the fault point according to the business datum of loopback, then return and the announcement of fault location point to give the up-to-date node that sends the loopback response message;
Receive can't fault location point the node of announcement, continue the order of structure loopback and give downstream neighbor;
After source node is received the business datum of loopback once more, if still can't the fault location position, then continue to return can't fault location point announcement to the up-to-date node that sends the loopback response message, until orienting position of failure point.
The embodiment of the invention also provides a kind of testing apparatus, and this method comprises:
Loopback order sending module is used for sending the loopback order to the downstream neighbor of service path;
The fault recognition module is used for confirming according to current business datum that receive and the loopback that receives before the position of fault point, also is used for sending notice message for the network element that carries out loopback in the time can't confirming the fault point according to described loopback response message;
Wherein, described network element is used for after receiving described notice message:
Its port that does not carry out loopback is carried out loopback,, then continue structure loopback response test message and give the respective downstream adjacent node if there is not the port that does not carry out loopback.
As from the foregoing, use technical scheme of the present invention, can carry out loopback test by means of signaling, quick and precisely the fault location particular location.
Description of drawings
Fig. 1 is for using the network topological diagram of the embodiment of the invention;
Fig. 2 is one embodiment of the invention flow chart;
Fig. 3 is further embodiment of this invention flow chart;
Fig. 4 is further embodiment of this invention schematic diagram.
Embodiment
The embodiment of the invention is by carrying the loopback order of appointment to certain network element in signaling, and according to the feedback that obtains from instrument or network element behind Test Strategy and the loopback, business is issued the loopback order in a certain order through the network element on the path, and the result who feeds back according to the loopback order orients the fault point.
In the network as shown in Figure 1, comprise two territories, first territory comprises network element A, B, C, D and E, and second territory comprises network element F, G, H, I and J.In the present embodiment, suppose that network breaks down, cause the cross-domain VC4 service disconnection of process B-C-D-F-H-J in the network.
In the prior art,, can only manually issue the loopback order by webmaster from management plane, loopback test is carried out in each possible fault point by the network manager in order to determine location of fault.Because business span-domain, the loopback order need issue respectively from the corresponding webmaster in two different territories.The network manager judges after receiving the loopback response message that each network element returns, and confirms the fault origination point.Efficient by the management plane transmitting order to lower levels is very low, makes mistakes easily, issues and carry out order at the network element in different territories from different webmasters, has increased the complexity of fault location more.Be difficult to meet requirement to fault location time.
Network topology structure below in conjunction with Fig. 1 is elaborated to the embodiment of the invention.
Embodiment 1
Present embodiment mainly is as shown in Figure 2: the network element of test point on service path sends the loopback order, wherein, receives that the network element of this loopback order carries out loopback at its inbound port or outbound port with business datum; Whether test point is normal according to the business datum behind the loopback of receiving, confirm the particular location of fault point, if can't confirm, the network element that then continues in service path sends the loopback order, until orienting position of failure point according to the reception condition of loopback business datum.
In the present embodiment, send the loopback order by entrance network element B, according to strategy, at first the signaling by control plane sends the loopback order to the outlet network element J of business, can specifically comprise in the loopback order to business the target port (port J-H) of target network element (J) of process be the loopback of granularity (VC4) with the business, also comprise loopback type, port J-H goes up the loopback (outloop) away from the intersection side.
The loopback order is carried in Path message, Notify message or transmission means in the signaling protocols such as existing GMPLS or MPLS similarly in other message, special message or agreement be can certainly define and the loopback order of fault location and other relevant order (as alarm down and insert control, whether begin to alarm inhibition etc.) are used to transmit.
In the present embodiment, suppose that the loopback order carries by Notify message, Notify message is sent to network element J by signaling communication network (SCN), if network element J receives the loopback order, promptly on the port of loopback order appointment, service channel is carried out corresponding loopback operation, with the business datum loopback, and return NotifyAck message and give inlet network element B, NotifyAck is used to inform this executed loopback operation of network element B.Whether network element B normally confirms the scope of fault point according to the business datum of the loopback of receiving.Wherein, network element J carries out loopback test to its port, in the present embodiment, after carrying out the loopback order, can start timer T1, so that behind T1, this network element can be removed loopback automatically, and is residual and cooperate follow-up automatic test to avoid loopback.Wherein, T1 can be disposed by the user, also can adopt default value, for example adopts default value T1=1s.Initiate the automatic network element B that detects of loopback according to the quality of receiving the business datum of loopback, and determine the transmission (can start the time point that timer is determined next loopback order transmission this moment simultaneously) or the failure location of next step loopback order according to strategy.In the present embodiment, fault occurs in network element H and goes up port near J, so B can't receive the business datum of normal loopback, can judge the upstream of fault at the H-J of network element J port (the H-J port of J i.e. the port of close H on J) in view of the above.
Then B starts the time that timer T2 determines that next loopback order sends, T2 can also can adopt default value by user configuration, ensure T2〉T1, to guarantee when sending next loopback order, remove according to the loopback that the previous command carries out, for example adopt T2=1.5s.In the present embodiment, at the T2 timer then, B sends the outloop order according to D-F (being that network element F goes up the port near the network element D) port of positioning strategy on network element F, after F receives, carry out corresponding loopback operation, B receives normal loopback business datum and learns professional leading to, and therefore, fault coverage is reduced to the downstream at the D-F of F port.
The result of network element B by above-mentioned twice loopback can learn that scope of failure occurs between the D-F port and the J-H port on the network element J on the network element F.So network element B proceeds loopback in underrange, network element B sends the outloop order according to the F-H port of strategy on network element H in the present embodiment, and is professional as can be known normal by the business datum of loopback; B can orient fault once more on F-H port on the H and the J between the H-J port.Then, the H-J port of B on H sends towards the loopback order (inloop) of intersection side, professional as can be known undesired by the reception condition of the business datum of returning, result according to the fault location that writes down behind the aforementioned repeatedly loopback, so far B can be with fault location accurately on the H-J port on the network element H, and at least 1 VC4 time slot breaks down on the link between the J-H of H-J port on the network element H and J in other words.This moment, fault location was promptly successfully finished, and the user can carry out subsequent treatment according to the fault location result, no longer described in detail herein.
Of particular note, the loopback strategy can be different with present embodiment in other embodiments.For example also can perhaps adopt the order loopback of dichotomy along the direction of B-C-D-F-H-J loopback successively with F-J-H.Those skilled in the art can design other strategy according to own needs easily by above-mentioned strategy, so do not describing in detail one by one at this.And NotifyAck message only is to have increased this message in order to strengthen reliability obviously not necessarily herein.
Embodiment 2
The present embodiment method is as shown in Figure 3: professional source node sends the downstream neighbor of loopback order to service path; The node of receiving the loopback order carries out loopback at its input port or output port to business datum; If source node can't be oriented the fault point according to the business datum of loopback, then return and the announcement of fault location point to give the up-to-date node that sends the loopback response message; Receive can't fault location point the node of announcement, continue the order of structure loopback and give downstream neighbor; After source node is received the business datum of loopback once more, if still can't the fault location position, then continue to return can't fault location point announcement to the up-to-date node that sends the loopback response message, until orienting position of failure point.
In the present embodiment, network topological diagram is identical with Fig. 1, and institute's difference is to carry by Path message, becomes the loopback order.Path message begins hop-by-hop and transmits along service path from source network element B, up to orienting the fault point automatically.Upstream network element mails to the loopback order of carrying in the Path message of downstream network element downstream network element, in this case, can carry in the Path message two loopback orders: one is the outloop order of next net element business inbound port, another is the inloop order of next net element business outbound port, among other embodiment, also can only carry one of them.In the present embodiment, carry out the loopback operation of inbound port earlier, according to the professional fine or not situation failure judgement scope of loopback, (for example 1s) over time, receive the inloop order of the network element execution of this Path message, the quality of service conditions behind the test point record loopback to this net element business inbound port.Then, receive that the network element of Path message is removed the loopback order of professional outbound port, generate Path message simultaneously and send to downstream network element.Be specifically described below:
Still assumed fault occurs in the H-J port of network element H.After business breaks down in the network, professional source network element B begins fault location as test point, network element B at first carries out inloop to business at the outbound port of this network element, the loopback result is professional normal, network element B so decidable are out of order a little in the loopback point downstream, remove existing loopback operation on B subsequently.This step is an optional step.
Then network element B generates Path message and mails to adjacent downstream network element C along the path, carry inloop order in the Path message to outloop and the outbound port C-D of the professional inbound port C-B on the downstream network element C that passes through, after C receives Path message, at first carry out outloop operation to inbound port C-B, the business datum of the loopback that network element B receives by analysis, professional as can be known normal (therefore can learn the downstream of fault point) at the C-B of network element C port, and with the normal message announcement network element of business C, network element C receives the outloop operation of announcement back releasing inbound port C-B, network element B gives an order and carries out inloop operation to outbound port C-D subsequently, network element B is by analyzing the business datum of loopback once more, normal as can be known (so the fault point is in downstream of the C-D of network element C port), and give network element C with this result and announcement.
Network element C receives the loopback operation of announcement back releasing to port C-D, and structure Path message, carry loopback order in the message to professional inbound port of downstream network element and outbound port, after downstream network element D receives C structure Path message, carry out the operation similar to network element C, and after receiving the notice message that network element B sends, generate Path message, mail to downstream network element F; After F executes corresponding operation, after after receiving the notice message that network element B sends, generating Path message, generate Path message and mail to downstream network element H, after H receives Path message, equally at first carry out outloop operation to inbound port H-F, at this moment, because the loopback service message that B receives is normal, therefore decidable is out of order a little after inbound port H-F, H removes the loopback operation to H-F, then H carries out the inloop operation to outbound port H-J, B receives that the business datum of loopback is undesired, therefore can be with accurate certain the VC4 time slot on the H-J port on the network element H of fault location, and the network element of B announcement subsequently H finishes fault location, so network element H removes the loopback operation on the H-J port, and regeneration subsequent P ath message not after this.
Embodiment 3
The embodiment of the invention also provides a kind of failure detector, as shown in Figure 4, is used for the method for Application Example 1, and this device comprises: loopback order sending module is used for to the network element transmission of network its port being carried out the order of loopback; The network element that receives orders carries out loopback according to order to the business datum of its port; The fault recognition module is used for the position according to the fine or not registration confirmed fault point of all loopback business datums that receive, and also is used in the time can't confirming position of failure point, notifies described loopback order sending module; Described loopback order sending module is selected network element according to notice after receiving the notice of described malfunctioning module, the network element that continues in network sends the loopback order.
Wherein, described fault recognition module also is used for: in the time can't confirming position of failure point, according to the scope of the position of the fine or not registration confirmed fault point of all loopback business datums that receive, and notify described loopback order sending module in described scope, to select network element; Accordingly, described loopback order sending module, the network element transmission that is used in the described scope of network is carried out the order of loopback to its port.
Embodiment 4
Another failure detector of the present invention, identical with Fig. 4, be used for the method for Application Example 2, comprising: loopback order sending module is used for sending the loopback order to the downstream neighbor of service path; The fault recognition module is used for the position according to the business datum affirmation fault point of the loopback that receives, and also is used for sending notice message for the network element that carries out loopback in the time can't confirming the fault point according to described loopback response message; Wherein, described network element is used for after receiving described notice message: its port that does not carry out loopback is carried out loopback, if there is not the port that does not carry out loopback, then continues structure loopback response test message and give the respective downstream adjacent node.
In the example mentioned above,, therefore can orient the professional down fault of multiple domain/AS automatically because signaling has cross-domain general and uniformity.
More than in all EXAMPLE Example, fault detect is finished separately by network element B.In other embodiments, network element B also can be by realizing fault location with mode that the router that is connected with B matches; Perhaps, also can be on network element B outside instrument to analyze loopback response message affirmation business be logical or disconnected, perhaps and then by service channel failure judgement point position range.Because principle is identical, also repeats no more herein.The said business datum of the embodiment of the invention is meant the data by the service channel transmission, can be that the data that actual needs is transmitted also can be special loopback test data.
Part steps can realize by software in the technical scheme that above embodiment provides, and software is stored on the storage medium that can read, as the floppy disk of computer, and hard disk or CD etc.
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present invention; And not breaking away from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.
Claims (10)
1, a kind of fault detection method is characterized in that, this method comprises:
The network element of test point on service path sends the loopback order, wherein, receives that the network element of this loopback order carries out loopback at its inbound port or outbound port with business datum;
Whether test point is normal according to the business datum behind the loopback of receiving, confirm the particular location of fault point, if can't confirm, the network element that then continues in service path sends the loopback order, until orienting position of failure point according to the reception condition of loopback business datum.
As the described method of application claim 1, it is characterized in that 2, the network element of described continuation in service path sends the loopback order, is specially:
According to the current reception condition of returning business datum, and the reception condition of the loopback business datum of receiving before, the scope of the localization of faults, and according to the network element transmission loopback order of fault point scope in service path.
As application claim 1 described method, it is characterized in that 3, this method comprises, described until orienting position of failure point according to the reception condition of the loopback business datum of receiving, be specially:
According to the reception condition of current loopback business datum, and the reception condition of loopback business datum before, a co position of being out of order.
As the described method of application claim 1, it is characterized in that 4, the network element of described continuation in service path sends the loopback order and be specially:
The not survey grid unit of continuation in service path sends the loopback order; Perhaps
Continuation has the network element of not surveying inbound port or outbound port and sends the loopback order in service path, wherein, receive that the network element of loopback order carries out its port of not surveying is carried out loopback test.
5, the embodiment of the invention also provides a kind of fault detection method, and this method comprises:
Professional source node sends the downstream neighbor of loopback order to service path;
The node of receiving the loopback order carries out loopback at its input port or output port to business datum;
If source node can't be oriented the fault point according to the business datum of loopback, then return and the announcement of fault location point to give the up-to-date node that sends the loopback response message;
Receive can't fault location point the node of announcement, continue the order of structure loopback and give downstream neighbor;
After source node is received the business datum of loopback once more, if still can't the fault location position, then continue to return can't fault location point announcement to the up-to-date node that sends the loopback response message, until orienting position of failure point.
As the described method of application claim 5, it is characterized in that 6, described source node in business also comprises before sending the downstream neighbor of loopback order to service path:
Whether professional source node is the fault point by loopback detection self.
7, as application claim 5 described method, it is characterized in that, described receive can't fault location point message node, continue the order of structure loopback to downstream neighbor, also comprise before:
Receive can't fault location point message node if inbound port or the outbound port of not surveying arranged, then business datum is carried out loopback at inbound port or the outbound port do not surveyed;
Described source node is received the business datum behind the loopback, if still can't the fault location position, continues to return and can't the announcement of fault location point give the up-to-date node that sends the loopback response message.
8, a kind of failure detector is characterized in that, this device comprises:
Loopback order sending module is used for to the network element transmission of network its port being carried out the order of loopback;
Loopback business diagnosis module, according to all loopback business datum analyses that receive,
The fault recognition module, be used for according to current and before the fine or not situation of the loopback business datum that receives confirm jointly the position of fault point also to be used in the time can't confirming position of failure point, notify described loopback order sending module;
Wherein, described loopback order sending module is selected network element according to notice after receiving the notice of described malfunctioning module, and the network element that continues in network sends the loopback order.
9, as the described device of application claim 8, it is characterized in that described fault recognition module also is used for:
In the time can't confirming position of failure point,, and notify described loopback order sending module in described scope, to select network element according to the scope of the position of the fine or not registration confirmed fault point of all loopback business datums that receive;
Accordingly, described loopback order sending module, the network element transmission that is used in the described scope of network is carried out the order of loopback to its port.
10, a kind of failure detector is characterized in that, this method comprises:
Loopback order sending module is used for sending the loopback order to the downstream neighbor of service path;
The fault recognition module is used for the position according to the business datum affirmation fault point of the loopback that receives, and also is used for sending notice message for the network element that carries out loopback in the time can't confirming the fault point according to described loopback response message;
Wherein, described network element is used for after receiving described notice message:
Its port that does not carry out loopback is carried out loopback,, then continue structure loopback response test message and give the respective downstream adjacent node if there is not the port that does not carry out loopback.
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| CN2008100660843A CN101505240B (en) | 2008-02-05 | 2008-02-05 | Fault detection method and apparatus |
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| CN2008100660843A CN101505240B (en) | 2008-02-05 | 2008-02-05 | Fault detection method and apparatus |
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| CN101505240B CN101505240B (en) | 2011-03-30 |
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| CN2008100660843A Expired - Fee Related CN101505240B (en) | 2008-02-05 | 2008-02-05 | Fault detection method and apparatus |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101902369A (en) * | 2010-07-23 | 2010-12-01 | 中兴通讯股份有限公司 | Fault location method and device of backboard cross system |
| WO2012079444A1 (en) * | 2010-12-17 | 2012-06-21 | 中兴通讯股份有限公司 | Method and system for realizing loopback control through control plane |
| WO2012171382A1 (en) * | 2011-06-17 | 2012-12-20 | 中兴通讯股份有限公司 | Loopback detection method and system |
| CN102904771A (en) * | 2012-09-25 | 2013-01-30 | 华为技术有限公司 | Network testing device and method thereof |
| CN105871569A (en) * | 2015-01-19 | 2016-08-17 | 中兴通讯股份有限公司 | Method and device for automatic detection of OTN network fault node |
| CN109787814A (en) * | 2018-12-25 | 2019-05-21 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | A kind of localization method of communication failure, system and terminal |
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| CN100370747C (en) * | 2004-12-02 | 2008-02-20 | 华为技术有限公司 | Communication equipment and its internal link fault positioning method |
| CN100563201C (en) * | 2004-12-02 | 2009-11-25 | 华为技术有限公司 | A kind of method for detecting route unit fault and device |
| CN100407666C (en) * | 2005-06-30 | 2008-07-30 | 华为技术有限公司 | Wideband wireless switch-in equipment chain circuit loop testing method |
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- 2008-02-05 CN CN2008100660843A patent/CN101505240B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902369A (en) * | 2010-07-23 | 2010-12-01 | 中兴通讯股份有限公司 | Fault location method and device of backboard cross system |
| CN101902369B (en) * | 2010-07-23 | 2015-10-21 | 中兴通讯股份有限公司 | The Fault Locating Method of backboard cross system and device |
| WO2012079444A1 (en) * | 2010-12-17 | 2012-06-21 | 中兴通讯股份有限公司 | Method and system for realizing loopback control through control plane |
| CN102571532A (en) * | 2010-12-17 | 2012-07-11 | 中兴通讯股份有限公司 | Method and system for realizing loopback control by control plane |
| WO2012171382A1 (en) * | 2011-06-17 | 2012-12-20 | 中兴通讯股份有限公司 | Loopback detection method and system |
| CN102904771A (en) * | 2012-09-25 | 2013-01-30 | 华为技术有限公司 | Network testing device and method thereof |
| CN102904771B (en) * | 2012-09-25 | 2015-06-17 | 华为技术有限公司 | Network testing device and method thereof |
| CN105871569A (en) * | 2015-01-19 | 2016-08-17 | 中兴通讯股份有限公司 | Method and device for automatic detection of OTN network fault node |
| CN105871569B (en) * | 2015-01-19 | 2020-08-04 | 中兴通讯股份有限公司 | Method and device for automatically detecting OTN network fault node |
| CN109787814A (en) * | 2018-12-25 | 2019-05-21 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | A kind of localization method of communication failure, system and terminal |
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| CN101505240B (en) | 2011-03-30 |
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