CN101183989A - Incremental analysis method of optical synchronization transmission network alarm correlation - Google Patents
Incremental analysis method of optical synchronization transmission network alarm correlation Download PDFInfo
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Abstract
The invention discloses an increment analysis method for optical synchronous transmission network alarm correlation, which comprises the following steps: step S102, when path configuration change occurs or alarm change occurs, the current analysis data is compared with the previous analysis data so as to obtain increment input data; and step S104, analysis processing is made according to the increment input data to determine root alarm, and the derivation relation between the root alarm and the non-root alarm. The invention can filter the case automatically that non-root alarm is not reported correctly, thereby further ensuring accuracy of analysis.
Description
Technical field
The present invention relates to the method for locating network fault in the optical transport network field.
Background technology
Along with the popularizing day by day, require to improve constantly of internet, to qualitative requirement, all promoting constantly advancing of technology from the requirement on the capacity for Network Transmission.In network transmission system, optical-fiber network has occupied more and more important role, and the network failure in the optical network system is judged and solution, is again the pith that guarantees the optical network system quality undoubtedly.Real network is in service, that root fault will cause will be a large amount of, by its warning information of deriving, the attendant need check that each reported by network elements in the network is to information such as the alarm classification of network management system and positions, determine the root of alarm again in conjunction with network informations such as network topology relation and business configuration, take series of solutions again, speed relies on attendant's knowledge and experience, accuracy and poor reliability slowly and too.
Content of the present invention is based on the publication number improvement for CN1713591 " optical synchronization transmission network alarm correlation analytical method ", further support path changes and alarms incremental analysis when changing, and no longer be all to need to carry out complete analysis after changing each time, further improve analysis speed, thereby fault location improves network availability quickly.
Therefore, need a kind of solution of incremental analysis of optical synchronization transmission network alarm correlation, can solve the problem in the above-mentioned correlation technique.
Summary of the invention
The objective of the invention is to improve proposing the alarm correlation analysis method in the CN1713591 patent, to support the analysis of increment.When the path changes and alarm when changing, do not need to carry out again the analysis of full dose, carry out incremental analysis and be based on former analysis result, reduce and analyze data volume, improve analysis speed.Simultaneously, incremental analysis also makes the alarm correlation analysis result to keep synchronously with network state apace, the fault of tracking network constantly, and instant analysis goes out Root alarm, so that the attendant can navigate to the reason that causes fault apace.
According to the present invention, a kind of incremental analysis method of optical synchronization transmission network alarm correlation is provided, may further comprise the steps: step S102 when path configurations changes or alarms when changing, compares this analysis data and the analysis data of last time to obtain increment input data; And step S104, carry out analyzing and processing with definite Root alarm according to increment input data, and the secondary relationship of Root alarm and the warning of non-root.
At least one that increment input data are alarmed collection for increasing newly, the alarm that disappears collects, increases newly the path collection and concentrate in the deletion path.
Said method is further comprising the steps of: set up a Root alarm set on each path node of every paths, to store potential Root alarm information.
Step S104 may further comprise the steps: step S104-2, and when the one or more non-Root alarm that the alarm that disappear to disappear is concentrated, the directly information and the corresponding secondary relationship of the one or more non-Root alarm of deletion from the last time analysis result; Step S104-4 when one or more path that concentrate in deletion deletion path, directly deletes the information in one or more path and the Root alarm set of each node thereof, and all alarms that will belong to one or more path all are set to wait for vanishing state; Step S104-6, when increasing by one or more path of concentrating in the path, one or more path is joined in the existing set of paths, and the set of the Root alarm of each node in one or more path that increases is set to sky, if and when being in one or more alarm of waiting for vanishing state and belonging to one or more path of increase, one or more alarm is joined in the alarm set of not analyzing; Step S104-8, when one or more Root alarm that the alarm that disappears is concentrated, for the client trail in path, one or more Root alarm place and through the client trail in path, one or more Root alarm place, deletion one or more Root alarm from the Root alarm set of the node at their places and downstream node thereof, for the client trail in path, one or more Root alarm place and through each alarm of the downstream node of the node of the client trail in path, one or more Root alarm place, if alarm can not be derived from any alarm the Root alarm set of its place node, will alarm to add and not analyze in the alarm set; Step S104-10 when increase by one or more new alarm is concentrated in newly-increased alarm, will increase the adding of alarm collection newly and not analyze in the alarm set; Step S104-12, all in the not analysis alarm set in sequence analysis transmission medium layer, higher order path layer and the low order channel layer are not analyzed the correlation of alarm, and analyze and analyze the influence of alarming client trail; And step S104-14, determine Root alarm according to the analysis result of step S104-12, and the secondary relationship of Root alarm and non-Root alarm, to obtain the alert analysis result.
Step S104-8 further may further comprise the steps: deleted the information and the corresponding secondary relationship thereof of alarm the analysis result from last time.
The step of the correlation of not analyzing all alarms do not analyzed in the alarm set in sequence analysis transmission medium layer, higher order path layer and the low order channel layer may further comprise the steps: analyze the not analysis alarm of each layer, to determine that not analyzing alarm is that Root alarm also is non-Root alarm, and when having determined that not analyzing alarm is Root alarm, the Root alarm of analyzing each layer is to the downstream node in the path of not analyzing the alarm place with to the influence through the downstream node of the client trail in each layer in the path of not analyzing the alarm place.
Analyze the not analysis alarm of each layer, to determine to analyze alarm is that Root alarm also is that the step of non-Root alarm is further comprising the steps of: can not derived out by one of a plurality of alarms in the Root alarm set in its path, place if analyze alarm, then will not analyze alarm and be defined as non-Root alarm, and the not analysis of directly analyzing next layer is alarmed, otherwise, be defined as potential Root alarm with not analyzing alarm, and carry out corresponding the processing; And circular treatment each do not analyze alarm, up to the not analysis alarm of handling all layers.
The corresponding processing may further comprise the steps: will not analyze alarm and join the node of not analyzing alarm path, place, and in the set of the Root alarm of all downstream nodes of node, and will not analyze the node of alarming the path, place, and in all alarms of all downstream nodes of node any one can never be analyzed the alarm alarm of deriving out and be defined as non-Root alarm, and at the node of not analyzing alarm path, place, and in the set of the Root alarm of all downstream nodes of node, if can never analyzing alarm, one or more potential Root alarm derives out, then with the deletion from the Root alarm set of one or more potential Root alarm.
The Root alarm of analyzing each layer is not to analyzing the downstream node in the path of alarming the place, with the step through the influence of the downstream node of the client trail in each layer in the path of not analyzing the alarm place be may further comprise the steps: judge whether each layer comprises client layer, if do not have, execution in step S104-14 then, otherwise, if variation has taken place for the Root alarm of last path node in each layer path set, all alarms in the Root alarm set of path node are joined in the Root alarm set through all downstream nodes in all direct customer's layer paths in layer path.
In the alarm of all downstream nodes through all direct customer's layer paths in layer path, can be under it alarm Root alarm set of node any one alarm of deriving out be defined as non-Root alarm.
Step S104-14 may further comprise the steps: can not derive out from any one alarm except that not analyzing alarm self the Root alarm set of its place path node if analyze alarm, then will not analyze alarm and be defined as Root alarm; And if analyze one or more alarms in the Root alarm set of alarm place path node and can derive and do not analyze alarm, then one or more alarms are defined as not analyzing the Root alarm of alarm.
By the present invention is big at alarm quantity, NE quantity is many, the business configuration complexity, and alarm status and path configurations change when very fast, can realize higher analysis efficiency, thereby the current malfunction of real-time tracking network constantly, instant analysis goes out Root alarm, so that the attendant can navigate to the reason that causes fault apace.Simultaneously, the situation that the non-Root alarm of energy automatic fitration does not correctly report further guarantees the accuracy of analyzing.Thereby help user's locating network fault rapidly and accurately.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart that illustrates according to the incremental analysis method of optical synchronization transmission network alarm correlation of the present invention;
Fig. 2 is the incremental analysis method flow chart that optical synchronization transmission network alarm correlation according to an embodiment of the invention is shown;
Fig. 3 is the transmission medium layer analysis flow chart that illustrates according to the embodiment of the invention;
Fig. 4 is the affirmation Root alarm that illustrates according to the embodiment of the invention, and Root alarm and non-Root alarm secondary relationship flow chart;
Fig. 5 is VC-4 (Virtual Container, level4) the analysis schematic diagram that alarm changes under the path protection situation that illustrates according to the embodiment of the invention;
Fig. 6 is the analysis schematic diagram that illustrates under the situation about changing simultaneously according to alarm and route under the VC-4 path protection situation of the embodiment of the invention; And
Fig. 7 illustrates the analysis schematic diagram that changes according to alarm under the situation that multiplex section protection is arranged of the embodiment of the invention.
Embodiment
Describe embodiments of the invention in detail below in conjunction with accompanying drawing.
Fig. 1 is the flow chart that illustrates according to the incremental analysis method of optical synchronization transmission network alarm correlation of the present invention.With reference to Fig. 1, incremental analysis method according to optical synchronization transmission network alarm correlation of the present invention may further comprise the steps: step S102, when path configurations changes or alarms when changing, this analysis data and the analysis data of last time are compared to obtain increment input data; And step S104, carry out analyzing and processing with definite Root alarm according to increment input data, and the secondary relationship of Root alarm and the warning of non-root.
At least one that increment input data are alarmed collection for increasing newly, the alarm that disappears collects, increases newly the path collection and concentrate in the deletion path.
Said method is further comprising the steps of: set up a Root alarm set on each path node of every paths, to store potential Root alarm information.
Step S104 may further comprise the steps: step S104-2, and when the one or more non-Root alarm that the alarm that disappear to disappear is concentrated, the directly information and the corresponding secondary relationship of the one or more non-Root alarm of deletion from the last time analysis result; Step S104-4 when one or more path that concentrate in deletion deletion path, directly deletes the information in one or more path and the Root alarm set of each node thereof, and all alarms that will belong to one or more path all are set to wait for vanishing state; Step S104-6, when increasing by one or more path of concentrating in the path, one or more path is joined in the existing set of paths, and the set of the Root alarm of each node in one or more path that increases is set to sky, if and when being in one or more alarm of waiting for vanishing state and belonging to one or more path of increase, one or more alarm is joined in the alarm set of not analyzing; Step S104-8, when one or more Root alarm that the alarm that disappears is concentrated, for the client trail in path, one or more Root alarm place and through the client trail in path, one or more Root alarm place, deletion one or more Root alarm from the Root alarm set of the node at their places and downstream node thereof, for the client trail in path, one or more Root alarm place and through each alarm of the downstream node of the node of the client trail in path, one or more Root alarm place, if alarm can not be derived from any alarm the Root alarm set of its place node, will alarm to add and not analyze in the alarm set; Step S104-10 when increase by one or more new alarm is concentrated in newly-increased alarm, will increase the adding of alarm collection newly and not analyze in the alarm set; Step S104-12, all in the not analysis alarm set in sequence analysis transmission medium layer, higher order path layer and the low order channel layer are not analyzed the correlation of alarm, and analyze and analyze the influence of alarming client trail; And step S104-14, determine Root alarm according to the analysis result of step S104-12, and the secondary relationship of Root alarm and non-Root alarm, to obtain the alert analysis result.
Step S104-8 further may further comprise the steps: deleted the information and the corresponding secondary relationship thereof of alarm the analysis result from last time.
The step of the correlation of not analyzing all alarms do not analyzed in the alarm set in sequence analysis transmission medium layer, higher order path layer and the low order channel layer may further comprise the steps: analyze the not analysis alarm of each layer, to determine that not analyzing alarm is that Root alarm also is non-Root alarm, and when having determined that not analyzing alarm is Root alarm, the Root alarm of analyzing each layer is to the downstream node in the path of not analyzing the alarm place with to the influence through the downstream node of the client trail in each layer in the path of not analyzing the alarm place.
Analyze the not analysis alarm of each layer, to determine to analyze alarm is that Root alarm also is that the step of non-Root alarm is further comprising the steps of: can not derived out by one of a plurality of alarms in the Root alarm set in its path, place if analyze alarm, then will not analyze alarm and be defined as non-Root alarm, and the not analysis of directly analyzing next layer is alarmed, otherwise, be defined as potential Root alarm with not analyzing alarm, and carry out corresponding the processing; And circular treatment each do not analyze alarm, up to the not analysis alarm of handling all layers.
The corresponding processing may further comprise the steps: will not analyze alarm and join the node of not analyzing alarm path, place, and in the set of the Root alarm of all downstream nodes of node, and will not analyze the node of alarming the path, place, and in all alarms of all downstream nodes of node any one can never be analyzed the alarm alarm of deriving out and be defined as non-Root alarm, and at the node of not analyzing alarm path, place, and in the set of the Root alarm of all downstream nodes of node, if can never analyzing alarm, one or more potential Root alarm derives out, then with the deletion from the Root alarm set of one or more potential Root alarm.
The Root alarm of analyzing each layer is not to analyzing the downstream node in the path of alarming the place, with the step through the influence of the downstream node of the client trail in each layer in the path of not analyzing the alarm place be may further comprise the steps: judge whether each layer comprises client layer, if do not have, execution in step S104-14 then, otherwise, if variation has taken place for the Root alarm of last path node in each layer path set, all alarms in the Root alarm set of path node are joined in the Root alarm set through all downstream nodes in all direct customer's layer paths in layer path.
In the alarm of all downstream nodes through all direct customer's layer paths in layer path, can be under it alarm Root alarm set of node any one alarm of deriving out be defined as non-Root alarm.
Step S104-14 may further comprise the steps: can not derive out from any one alarm except that not analyzing alarm self the Root alarm set of its place path node if analyze alarm, then will not analyze alarm and be defined as Root alarm; And if analyze one or more alarms in the Root alarm set of alarm place path node and can derive and do not analyze alarm, then one or more alarms are defined as not analyzing the Root alarm of alarm.
Below with reference to Fig. 2 one embodiment of the present of invention are described.In this embodiment, consider two kinds of situations: path configurations changes, and situation and alarm when comprising the increase, deletion in path and modification change, the situation when comprising the generation of the disappearance of existing alarm and new alarm.
Because the variation of network management system path configurations, perhaps control aspect calculates the variation of dynamic route, all can cause the variation of the required path data of alarm correlation analysis.After the path changed, corresponding upstream and downstream, path relation and service layer/client trail relation all will change.Because path change can be dynamic, and alarm reports webmaster and also may have time-delay from producing at equipment, so, the analysis of this paper thinks that all alarm changes and path change is can be nonsynchronous, that is to say that certain paths changes that the alarm that causes changes can be before path change (for example because the delay of alarm report etc.), also can be after path change.Distinguish path upstream and downstream relation for convenience, the unidirectional path that the path of this joint all is meant.
Certain paths is deleted, or after any one node in the path changes, all may cause upstream and downstream, the path relation of foundation in the last analysis result and the variation that service layer/client trail concerns.Newly-increased path can not influence the variation of upstream and downstream, the path relation and the service layer/client trail relation of foundation in the last analysis result, does not need special consideration.The variation in path is divided into two kinds herein: increase and deletion.It is deleted that the path modification then is considered as old path, and increase a new path.When a service layer path is deleted, its all client trail also will change, they or deleted, perhaps be modified.Suppose to have deleted path P ath-A, then all path nodes of the client trail of Path-A and process Path-A will no longer belong to original path.For the alarm of these nodes, last alarm correlation analysis result is with no longer valid.If do not have new path through these nodes, then these nodes will enter and wait for the alarm vanishing state, otherwise enter the state that reanalyses of waiting for.Enter the alarm of waiting for vanishing state, after through the segment acknowledgement time,, then enter the state that reanalyses of waiting for if new path is arranged through node under it.
When new alarm produces or existing alarm disappears, also need to carry out the alarm correlation analysis of increment.
When one or more new alarms produce, need to analyze the secondary relationship of it and other alarm.
When one or more alarms disappear, if certain alarm then can directly delete this alarm to get final product for non-Root alarm; Be Root alarm if this is alarmed, the path of establishing under its is Path-C, then needs to remove this alarm from Path-C and the Root alarm through the downstream node of the client trail of Path-C, and the alarm of these downstream nodes is analyzed again.
Step S202 obtains incremental data, supposes that last analysis result is R0, and this result that need obtain is R1.This is analyzed the input data and compares with the analysis data of last time, and following variation has taken place: newly-increased alarm collection AlarmSet-New, the alarm collection AlarmSet-Clear that disappears, newly-increased path collection PathSet-Add, deletion path collection PathSet-Del.In addition, set up a Root alarm set, store potential Root alarm information, and guarantee that alarm wherein can not repeat at each path node of each paths.The incremental analysis process of this embodiment may further comprise the steps:
Step S204, the non-Root alarm that disappears for each alarm among the AlarmSet-Clear, if it is the non-Root alarm among the R0, is then directly deleted the information and the corresponding secondary relationship of this alarm from R0;
Step S206, the deletion path, for each the path P ath-D among the PathSet-Del, all client trail of Path-D and process Path-D all need deleted.For these paths, directly delete routing information and their each node Root alarm set.In addition, all alarms that belong to these paths all are set to wait for vanishing state;
Step S208, increase the path, for each paths among the PathSet-Add, their path all joins in the existing set of paths, and the Root alarm set that path node is set is sky, in addition, belong to the path that certain bar increases newly, then this alarm is joined and do not analyze among the alarm set A larmSet-Waiting if certain is in the alarm of waiting for vanishing state;
Step S210, the disappearance Root alarm, for each alarm among the AlarmSet-Clear, if it is the Root alarm among the R0, then need further to analyze this alarm and disappear to the influence of the alarm correlation of the downstream node of this layer path and client trail among the R0, suppose that this alarm is Alarm-1, path of living in is Path-E, node is PathNode-E, and analytic process is as follows:
1) for all direct and indirect client trail of Path-E and process Path-E, from the Root alarm set of PathNode-E and downstream node thereof, deletes Alarm-1.Simultaneously, each alarm for the node in the PathNode-E downstream of Path-E and and indirect client trail direct through all of Path-E, if this alarm cannot be derived from any alarm the Root alarm set of node of living in, then this alarm is joined and do not analyze among the alarm set A larmSet-Waiting; And
2) information of deletion Alarm-1 and corresponding secondary relationship from R0;
Step S212 adds newly-increased alarm, AlarmSet-New is joined do not analyze among the alarm set A larmSet-Waiting;
Step S214 analyzes the correlation that all near-ends of not analyzing are alarmed, and in order to improve the speed of analysis, analyzes by the level of layer network.Elder generation's Analysis Service layer is analyzed client layer again.For optical transport network, be divided into the transmission medium layer usually, three level of higher order path layer and low order channel layer, the order of analysis is: transmission medium layer, higher order path layer and low order channel layer.The analytic process following (as shown in Figure 3) of each layer (supposing that this layer is Layer-A):
Analyze the near-end alarm of Layer-A layer, for the near-end alarm of each the Layer-A layer among the AlarmSet-Waiting, at first analyzing it is Root alarm, also is non-Root alarm.And further analyze the downstream node of Layer-A layer Root alarm, and alarm the influence of downstream node of the client trail in path of living in through this to this police path of living in.This process comprises the steps: again
1.1 analyze the transmission of Layer-A layer near-end alarm, and determine that it is a Root alarm, also be non-Root alarm in this layer path.For each Layer-A layer near-end alarm of still not confirming as non-Root alarm, carry out the analysis of following two steps.Suppose that this alarm is Alarm-2, path of living in is Path-F, and path node of living in is PathNode-F, comprises following two steps:
1.1.1 if Alarm-2 can be derived out by certain alarm in the Root alarm set of PathNode-F, confirm that then it is not a Root alarm, do not need further analysis, directly analyze next Layer-A layer alarm; Otherwise, confirm as potential Root alarm, continue next step;
1.1.2 add Alarm-2 in the set of the Root alarm of the PathNode-F in Path-F and all nodes in downstream thereof.In the alarm of these nodes, any one can all can confirm as non-Root alarm from the alarm that Alarm-2 derives, and does not need further analysis.Simultaneously, in the Root alarm set of these nodes,, then these potential Root alarm are deleted from the Root alarm set if some potential Root alarm can be derived from Alarm-2; And
1.1.3 each alarm of circular treatment is up to processing all Layer-A layer near-ends alarm that is over;
1.2 analyze the influence of near-end alarm to client trail.If the Layer-A layer does not have client layer, then forwarded for the 7th step to.Otherwise, last path node PathNode-G for each bar Layer-A layer path P ath-G, if variation has taken place for the Root alarm of PathNode-G set, then all alarms in the set of the Root alarm of PathNode-G are joined in the Root alarm set through all downstream nodes in all direct customer's layer paths of Path-G.In the alarm of these downstream nodes, any one can be under it alarm the Root alarm set of the node alarm of deriving, all can confirm as non-Root alarm, do not need further analysis;
Step S216 determines Root alarm, and the secondary relationship of Root alarm and non-Root alarm, and the result who obtains is R1, as shown in Figure 4, and wherein:
For each near-end alarm, carry out after the analytical procedure of front, if the Root alarm of its path node of living in is gathered without any variation, then the secondary relationship of this alarm does not just change yet, and does not need to carry out this step processing.Otherwise, need carry out following analysis: if it can not derive in any one alarm except that this alarm self from the Root alarm set of path node of living in, then this alarm is Root alarm, must comprise this alarm self in the Root alarm set of this alarm this moment path node of living in; If some alarm in the set of the Root alarm of its path node of living in can derive this alarm, then these alarms in the tabulation are exactly its Root alarm, must not comprise this alarm self in the Root alarm set of this alarm this moment path node of living in;
For each remote alarm, because this alarm is by the alarm of reverse path to the Trail termination source feedback after Trail termination sink detects defect state.Therefore detected remote alarm promptly is to be alarmed by the near-end of forward path Su Duan to cause that their Root alarm is identical on the reverse path.Therefore can search all alarms that can cause this remote alarm in the Root alarm set of forward path Su Duan, they are exactly the Root alarm of this remote alarm.If any variation does not take place the set of the Root alarm of forward path Su Duan, the Root alarm of this remote alarm does not just change yet.
Below in conjunction with Fig. 5～Fig. 7 other embodiment of the present invention are described.
As can be seen, method of the present invention is used based on the transmitting function in the concept hierarchy of layer network and path and is analyzed correlation between the alarm in following embodiment.So-called layer network refers to a kind of Topological component, is made up of the transmission entity and the transmission processing capacity of generation, transmission and the termination of describing specific characteristic information.Optical synchronous transport network is divided into some independently layer networks from vertical direction, be path layer network and transmission medium layer network, path layer network can be divided into low order channel layer network and higher order path layer network again, and the transmission medium layer network can be divided into multiplex section layer network, regenerator section layer network and physical layer network again.Has client/server relationship between the adjacent layer network.So-called path is the transmission entity in the Server layer network, is delimited by two access points at two ends, path, has represented the contact between the path ends, is responsible for the transmission integrality of the characteristic information of one or more client layer networks between service layer's access point.
The present invention is come the correlation of the alarm between each node on the analysis path by upstream node transmission to downstream node in the path by alarm; To the influence of client layer, come the correlation of the alarm of Analysis Service layer path node and client trail node by AIS or SSF (ServerSignal Fail, service signal lost efficacy).Concrete according to as follows:
1, transmission medium layer path node can transmit all alarms of MSn (MultiplexSection layer, level n, n=1,4,16,64) Trail termination sink function to its downstream node.The LOS of transmission medium layer (Loss of Signal, dropout), LOF (Loss Of Frame, LOF), MS AIS and RS (Regenerator Section, regenerator section) TIM (TraceIdentifier Mismatch, the trace labelling mismatch, this alarm is optional), MSn detected AU LOP (Loss of Pointer) in the Sn adaption function, all will cause the relevant position of the adaptive place end function of downstream node MSn and Sn to detect AU (Administrative Unit, administrative unit) ais alarm.
2, higher order path layer path node will be to its downstream node transmission AU ais alarm and all alarms of Sn (higher order VC-n layer, n=3,4) Trail termination sink function.UNEQ (the Unequipped of AU AIS and higher order path layer, unloaded), TIM (this alarm is optional), Sn alarm such as detected LOM (Loss ofMultiframe), PLM (Payload Mismatch) and TU LOP in the Sm adaption function all will cause the relevant position of the adaptive place end function of downstream Sn and Sm to detect TU (TributaryUnit, tributary unit) ais alarm.
3, the node in low order channel layer path will be to its downstream node transmission TU ais alarm and all alarms of Sm (lower order VC-m layer, m=11,12,2,3) Trail termination sink function.
For convenience of description, make following regulation for the method for expressing of alarm, path and path node:
Bi-directional transmission medium layer path MsPath-1 from A to B, A is expressed as MsPath-1-AC to B, and B is expressed as MsPath-1-CA to A.Two-way higher order path layer path HoPath-1 from A to B, A is expressed as HoPath-1-AB to B, and B is expressed as HoPath-1-BA to A.Two-way low order channel layer path LoPath-1 from A to B, A is expressed as LoPath-1-AB to B, and B is expressed as LoPath-1-BA to A.
Suppose that unidirectional path is expressed as X, the node Y of its process is expressed as Y:X, and the alarm Z of Y:X is expressed as Z (Y:X).
Fig. 5 represents to have the situation of VC-4 path protection: network element A, C, D, E, F, G are ADM (Add-Drop Multiplexer, add-drop multiplexer), and network element B is REG (Regenerator, a regenerator).C-D-F is the operating path of VC-4 SNCP, and C-E-F is the protection path of VC-4 SNCP.A, B, C form a bi-directional transmission medium layer path MsPath-1, and the transmission medium layer path between 2 of C, the D is designated as MsPath-2, and A, C, D (E), F, G form a higher order path layer path HoPath-1.63 2M services are from A, through this higher order path layer path, under G.Other has a higher order path layer path HoPath-2 who is formed by C, D, F.
See the situation when alarm changes earlier.As shown in Figure 5, when the fiber break of A-＞B, B can detect the LOS alarm.Cause simultaneously detecting the MS ais alarm, and alarm to A feedback MS RDI at C; On HoPath-1, all detect AU-4 (Administrative Unit, level 4) ais alarm at D, E, F, G, and alarm to A feedback VC-4 RDI; Also can detect 63 TU-12 ais alarms at G, and to 63 VC-12 RDI alarms of A feedback.By a bit, the input data that draw incremental analysis are:
PathSet-Del: this set is for empty;
PathSet-Add: this set is for empty;
AlarmSet-Clear: this set is for empty;
AlarmSet-New：
Transmission medium layer alarm: LOS (B:MsPath-1-AC), MS AIS (C:MsPath-1-AC), MS RDI (A:MsPath-1-CA);
Higher order path layer alarm AU-4 AIS (D:HoPath-1-AG), AU-4AIS (E:HoPath-1-AG), AU-4 AIS (F:HoPath-1-AG), AU-4 AIS (G:HoPath-1-AG), VC-4 RDI (A:HoPath-1-GA), VC-4 RDI (C:HoPath-1-GA), VC-4 RDI (D:HoPath-1-GA), VC-4 RDI (E:HoPath-1-GA), VC-4 RDI (F:HoPath-1-GA);
Low order channel layer alarm: 63 TU-12 ais alarms that the G point detects and 63 VC-12 RDI alarms that detect at the A point.
Have only newly-increased alarm this moment, do not have other variation, it is as follows therefore to make a concrete analysis of step:
Step S502 joins all newly-increased alarms in the AlarmSet-New set in the Alarm-Waiting set.
Step S504 at first analyzes the alarm of transmission medium layer.Travel through all transmission medium layer alarms in order,, on MsPath-1-AC, LOS (B:MsPath-1-AC) is joined in the Root alarm set of B, C two nodes if at first traverse LOS (B:MsPath-1-AC).When next traversing MS AIS (C:MsPath-1-AC) again, owing to this alarm can be derived by LOS (B:MsPath-1-AC) from the Root alarm set of C node, so, determine that it is not a Root alarm.And if traverse MS AIS (C:MsPath-1-AC) earlier, MS AIS (C:MsPath-1-AC) is joined in the Root alarm set of C.Next traverse LOS (B:MsPath-1-AC) again, when joining it in the Root alarm set of B, C, because the MS AIS of C can derive from LOS (B:MsPath-1-AC), so, deletion MS AIS (C:MsPath-1-AC) from the Root alarm set of C.
Analyze of the influence of transmission medium layer Root alarm to client trail.Because the transmission medium layer path MsPath-1 that the higher order path layer HoPath-1 path that A, C, D (E), F, G form forms through A, B, C, so in the Root alarm information of downstream node D, the E of HoPath-1-AG, F, G, add LOS (B:MsPath-1-AC).
Equally, in the analysis of higher order path layer, on the HoPath-1-AG path, the AU-4 ais alarm of D, E, F, G each point all can be derived by LOS (B:MsPath-1-AC) from their Root alarm set, so they all are not Root alarm.The higher order path layer path HoPath-1 that the low order channel layer path that A, G form forms through A, C, D (E), F, G, so in the Root alarm information of the downstream node G in low order channel layer path, add all alarms in the Root alarm set of ingress G:HoPath-1-AG, i.e. LOS (B:MsPath-1-AC).By analyzing, the TU12-AIS alarm of G can be derived by LOS (B:MsPath-1-AC) from its Root alarm set, so they all are not Root alarm.Because it is Root alarm that all alarms have all determined whether, carry out step 7.
Step S506 determines the near-end Root alarm, and the relation of Root alarm and non-Root alarm.Determine the near-end Root alarm earlier, and the relation of Root alarm and non-Root alarm.For LOS (B:MsPath-1-AC), in the set of the Root alarm of B:MsPath-1-AC,,, this is Root alarm so alarming without any alarming this alarm of to derive.MS AIS (C:MsPath-1-AC) can be derived by LOS (B:MsPath-1-AC) in the Root alarm set of C:MsPath-1-AC, so the Root alarm of MS AIS (C:MsPath-1-AC) is LOS (B:MsPath-1-AC).In like manner, the Root alarm of the AU-4 AIS of D, E, F, G and TU12-AIS alarm also is LOS (B:MsPath-1-AC).
Confirm the Root alarm of remote alarm again, MS RDI (A:MsPath-1-CA) can be derived by the LOS (B:MsPath-1-AC) in the Root alarm set of the place end node C:MsPath-1-AC of MsPath-1-AC, determines that thus its root is LOS (B:MsPath-1-AC).In like manner, can determine that the VC-4 RDI of A, C, D, E, F and VC12-RDI alarm and can be derived by LOS (B:MsPath-1-AC), so their Root alarm is LOS (B:MsPath-1-AC).Analysis is finished.
Next, consider the situation that a kind of non-Root alarm does not correctly report again.(F:HoPath-1-AG) correctly do not report if AU-4 is AIS, when analyzing LOS (B:MsPath-1-AC), still can increase LOS (B:MsPath-1-AC) in the Root alarm set of G:HoPath-1-AG, the analysis result that draws has reported consistent with AU-4AIS (F:HoPath-1-AG).Therefore, non-Root alarm does not correctly report can't influence final analysis result.
See the situation that alarm and path change simultaneously again.As shown in Figure 6,, then detect the LOS alarm at D if the optical fiber between C-＞D has also interrupted, rather than the AU-4 ais alarm, simultaneously, D will alarm to C loopback MS RDI.Simultaneously, because D detects the LOS alarm, the higher order path layer path HoPath-2 that C, D, F form is the higher order path layer path HoPath-3 that C, E, F form by automatic heavy-route.By a bit, the input data that draw incremental analysis are:
PathSet-Del：HoPath-2；
PathSet-Add：HoPath-3；
AlarmSet-New：LOS(D：MsPath-2-CD)，MS?RDI(C：MsPath-2-DC)；
AlarmSet-Clear：AU-4?AIS(D：HoPath-1-AG)。
Analytic process is as follows:
Step S602, non-Root alarm disappears.Alarm among the AlarmSet-Clear is non-Root alarm at last once analysis result, and directly disappearing gets final product;
Step S604, the deletion path.HoPath-2 is deleted, it and will be cleared through its Root alarm information of all client trail nodes, simultaneously, the alarm of these nodes will enter the wait vanishing state.Because HoPath-2 is without any alarm in last the analysis, so, need not to carry out this step to analyze;
Step S606 increases the path.HoPath-3 will be added in the current path;
Step S608, the disappearance Root alarm.Not alarming at last once analysis result among the AlarmSet-Clear is Root alarm, need not to carry out this step analysis;
Step S610 adds newly-increased alarm.All alarms among the AlarmSet-New are joined not analysis to be alarmed among the set A larmSet-Waiting;
Step S612 analyzes all correlations of not analyzing alarm.Through the step of front, have only two alarm: LOS (D:MsPath-2-CD) and MS RDI (C:MsPath-2-DC) to need to analyze among the AlarmSet-Waiting,
At first analyze the alarm of transmission medium layer.Travel through all transmission medium layer alarms in order, when traversing LOS (D:MsPath-2-CD), it can not be derived by any alarm in the Root alarm set of D:MsPath-2-CD, so it is a Root alarm, it is added in the Root alarm set of D:MsPath-2-CD
Analyze of the influence of transmission medium layer Root alarm to client trail.HoPath-1 is through MsPath-2.During to the influencing of HoPath-1, need to consider the influence of SNCP in the alarm of analyzing MsPath-2.If what the SNCP of F:HoPath-1-AG was selected is service aisle, then LOS (D:MsPath-2-CD) will join in the Root alarm set of F:HoPath-1-AG and G:HoPath-1-AG; If what the SNCP of F:HoPath-1-AG was selected is the protection passage, then LOS (D:MsPath-2-CD) only joins in the Root alarm set of F:HoPath-1-AG of HoPath-1-AG,
Carry out the analysis of higher order path layer again.The alarm of higher order path layer do not change, and only needs to analyze the influence of higher order path layer to the low order channel layer.When the SNCP of F:HoPath-1-AG select be service aisle the time; because variation has taken place in the set of the Root alarm of last node G:HoPath-1-AG of HoPath-1-AG; so, need add the alarm in the set of the Root alarm of G:HoPath-1-AG in 63 low order channel layer paths from A to G.When the SNCP of F:HoPath-1-AG select be the protection passage time because the set of the Root alarm of last node G:HoPath-1-AG of HoPath-1-AG do not change, so, do not need to do any operation,
Carry out the low order channel layer analysis again.Low order channel layer alarm do not change, and it does not have client layer yet, carries out for the 7th step;
Step S614 determines the near-end Root alarm, and the relation of Root alarm and non-Root alarm.Determine the near-end Root alarm earlier, and the relation of Root alarm and non-Root alarm.In the Root alarm set of B:MsPath-1-AC, without any alarming the LOS (B:MsPath-1-AC) that to derive, so LOS (B:MsPath-1-AC) is a Root alarm.MS AIS (C:MsPath-1-AC) can be derived by LOS (B:MsPath-1-AC) in the Root alarm set of C:MsPath-1-AC, so the Root alarm of MS AIS (C:MsPath-1-AC) is LOS (B:MsPath-1-AC).In the Root alarm set of D:MsPath-2-CD, without any alarming the LOS (D:MsPath-2-CD) that to derive, so LOS (D:MsPath-2-CD) also is a Root alarm.When the SNCP of F:HoPath-1-AG select be service aisle the time; in the Root alarm set of F:HoPath-1-AG and G:HoPath-1-AG; LOS (D:MsPath-2-CD) and LOS (B:MsPath-1-AC) all can derive AU-4 AIS (F:HoPath-1-AG) and AU-4 AIS (G:HoPath-1-AG); so AU-4 AIS (F:HoPath-1-AG) and AU-4 AIS (G:HoPath-1-AG) have two Root alarm: LOS (D:MsPath-2-CD) and LOS (B:MsPath-1-AC).Equally, the TU-12 ais alarm that detects at the G point of 63 low order channel layer paths from A to G also has two Root alarm: LOS (D:MsPath-2-CD) and LOS (B:MsPath-1-AC).And when the SNCP of F:HoPath-1-AG select be the protection passage time; in the Root alarm set of F:HoPath-1-AG; LOS (D:MsPath-2-CD) and LOS (B:MsPath-1-AC) the AU-4 AIS (F:HoPath-1-AG) that all can derive; and in the set of the Root alarm of G:HoPath-1-AG; have only LOS (B:MsPath-1-AC), and its AU-4 AIS (G:HoPath-1-AG) that can derive.So AU-4 AIS (F:HoPath-1-AG) has two Root alarm: LOS (D:MsPath-2-CD) and LOS (B:MsPath-1-AC), and AU-4 AIS (G:HoPath-1-AG) has only Root alarm a: LOS (B:MsPath-1-AC).Equally, the TU-12 ais alarm that detects at the G point of 63 low order channel layer paths from A to G also has only Root alarm a: LOS (B:MsPath-1-AC).
Confirm the Root alarm of remote alarm again, the MS RDI (B:MsPath-1-CA) of B can MsPath-1-AC the Root alarm set of place end node C:MsPath-1-AC in LOS (B:MsPath-1-AC) derive, determine that thus its root is LOS (B:MsPath-1-AC).When the SNCP of F:HoPath-1-AG select be service aisle the time; VC-4 RDI that the last A of HoPath-1-GA, C, D, E, F are ordered alarm can be derived by LOS (D:MsPath-2-CD) and the LOS (B:MsPath-1-AC) in the Root alarm set of the Trail termination sink node G:HoPath-1-AG of HoPath-1-AG, and definite thus their root is LOS (D:MsPath-2-CD) and LOS (B:MsPath-1-AC).The Root alarm of the VC-12 RDI alarm of 63 road low order channels of A also can be derived by LOS (D:MsPath-2-CD) and the LOS (B:MsPath-1-AC) in the Root alarm set of the low order channel layer Trail termination sink node G on A-＞G direction, determines that thus their root is LOS (D:MsPath-2-CD) and LOS (B:MsPath-1-AC).And when the SNCP of F:HoPath-1-AG select be the protection passage time; the Root alarm of the VC-4 RDI alarm that the last A of HoPath-1-GA, C, D, E, F are ordered can be derived by the LOS (B:MsPath-1-AC) in the Root alarm set of the place end node G:HoPath-1-AG on the HoPath-1-AG, determines that thus their root is LOS (B:MsPath-1-AC).The Root alarm of the VC-12 RDI alarm of 63 road low order channels of A can be derived by the LOS (B:MsPath-1-AC) in the Root alarm set of the low order channel layer Trail termination sink node G on A-＞G direction, determines that thus their root is LOS (B:MsPath-1-AC).Analysis is finished.
Fig. 7 represents to have the situation of multiplex section protection: all network elements are ADM, and wherein A, B, C, D form a multiplex section ring.A, B, D, E form a higher order path layer path HoPath-4.As figure, fiber break between A-＞B then can detect the LOS alarm at B, and alarms to A point loopback MS RDI.Transmission medium layer path representation between A, the B is MsPath-3.Bridge joint is not switched if A and B carry out the multiplex section ring, and then D and the E point at HoPath-4 can detect AU-4AIS.Bridge joint is switched if A and B have carried out the multiplex section ring, and then D and the E point at HoPath-4 all can not detect alarm.Suppose that A and B have carried out multiplex section ring bridge joint and switched after fiber break, the HoPath-4 path becomes the HoPath-5 shown in the dotted line.And on HoPath-5, because the fault of D causes E to detect VC-4 UNEQ alarm, and alarms to A loopback VC-4 RDI.By a bit, the input data that draw incremental analysis are:
PathSet-Add：HoPath-5；
PathSet-Del：HoPath-4；
AlarmSet-Clear: alarm does not disappear, and this set is for empty;
AlarmSet-New：LOS(B：MsPath-3-AB)，MS?RDI(A：MsPath-3-BA)，VC-4?UNEQ(E：HoPath-5-AE)，VC-4?RDI(D：HoPath-5-EA)，VC-4?RDI(C：HoPath-5-EA)，VC-4?RDI(B：HoPath-5-EA)，VC-4?RDI(A：HoPath-5-EA)。
Step S702, non-Root alarm disappears.AlarmSet-Clear is empty, skips this step;
Step S704, the deletion path.HoPath-4 is deleted, it and will be cleared through its Root alarm information of all client trail nodes, simultaneously, the alarm of these nodes will enter the wait vanishing state.Because HoPath-4 is without any alarm in last the analysis, so, need not to carry out this step to analyze;
Step S706 increases the path, and HoPath-5 will be added in the current path;
Step S708, disappearance Root alarm, AlarmSet-Clear are empty, skip this step;
Step S710 adds newly-increased alarm, all alarms among the AlarmSet-New is joined do not analyze among the alarm set A larmSet-Waiting;
Step S712 analyzes all correlations of not analyzing alarm;
At first analyze the alarm of transmission medium layer.In AlarmSet-Waiting, has only transmission medium layer near-end alarm a: LOS (B:MsPath-3-AB).LOS (B:MsPath-3-AB) is joined in the Root alarm set of B:MsPath-3-AB.
Analyze the influence of transmission medium layer alarm to client trail.Because MsPath-3 does not have client trail, so, need not to analyze.
Analyze the alarm of higher order path layer again.In AlarmSet-Waiting, has only higher order path layer near-end alarm: a VC-4 UNEQ (E:HoPath-5-AE).This alarm is joined in the Root alarm set of E:HoPath-5-AE.
Analyze the influence of higher order path layer alarm to client trail.Because HoPath-5 does not have client trail, so, need not to analyze.
In the current path set, do not have low order channel layer path, forwarded for the 7th step to;
Step S714 determines the near-end Root alarm, and the relation of Root alarm and non-Root alarm.Determine the near-end Root alarm earlier, and the relation of Root alarm and non-Root alarm.In the Root alarm set of B:MsPath-3-AB, without any alarming the LOS (B:MsPath-3-AB) that to derive, so LOS (B:MsPath-3-AB) is a Root alarm.In the Root alarm set of E:HoPath-5-AE, without any alarming the VC-4 UNEQ (E:HoPath-5-AE) that to derive, so VC-4 UNEQ (E:HoPath-5-AE) is a Root alarm.
Confirm the Root alarm of remote alarm again, MS RDI (A:MsPath-3-BA) can be derived by the LOS (B:MsPath-3-AB) in the Root alarm set of the place end node B:MsPath-3-AB of MsPath-3-AB, determines that thus its root is LOS (B:MsPath-3-AB).The VC-4 RDI that the HoPath-5-EA direction detects at A, C, D, B point, can derive by the VC-4 UNEQ (E:HoPath-5-AE) of the place end node E:HoPath-5-AE of HoPath-5-AE, so their root is exactly VC-4 UNEQ (E:HoPath-5-AE).Analysis is finished.
Increment alarm correlation analysis method proposed by the invention, can analyze the various alarms in the optical synchronous transport network, according to upstream and downstream relation and the relation of service layer path and the client trail corresponding relation of determining final Root alarm and Root alarm and non-Root alarm of alarm in the path.When the path changes and alarm when changing, do not need to carry out again the analysis of full dose, carry out incremental analysis and be based on former analysis result, reduce and analyze data volume, improve analysis speed.Therefore, big at alarm quantity, NE quantity is many, the business configuration complexity, and alarm status and path configurations change when very fast, still concrete higher analysis efficiency, thereby the current malfunction of real-time tracking network constantly, instant analysis goes out Root alarm, so that the attendant can navigate to the reason that causes fault apace.Simultaneously, the situation that the non-Root alarm of energy automatic fitration does not correctly report further guarantees the accuracy of analyzing.Thereby help user's locating network fault rapidly and accurately.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. the incremental analysis method of an optical synchronization transmission network alarm correlation is characterized in that, may further comprise the steps:
Step S102 when path configurations changes or alarms when changing, compares this analysis data and the analysis data of last time to obtain increment input data; And
Step S104 carries out analyzing and processing with definite Root alarm according to described increment input data, and the secondary relationship of described Root alarm and the warning of non-root.
2. method according to claim 1 is characterized in that, at least one that described increment input data are alarmed collection for increasing newly, the alarm that disappears collects, increases newly the path collection and concentrate in the deletion path.
3. method according to claim 2 is characterized in that, and is further comprising the steps of: set up a Root alarm set on each path node of every paths, to store the information of potential Root alarm.
4. method according to claim 3 is characterized in that, described step S104 may further comprise the steps:
Step S104-2, when the one or more non-Root alarm that the described disappearance alarm that disappears is concentrated, the directly information and the corresponding secondary relationship of the described one or more non-Root alarm of deletion from described last time analysis result;
Step S104-4, when one or more path that concentrate in the described deletion of deletion path, the directly Root alarm of the deletion information in described one or more path and each node thereof set, and all alarms that will belong to described one or more path all are set to wait for vanishing state;
Step S104-6, when increasing by one or more path of concentrating in described increase path, described one or more path is joined in the existing set of paths, and the set of the Root alarm of each node in described one or more path that increases is set to sky, if and one or more alarm that is in described wait vanishing state joins described one or more alarm in the alarm set of not analyzing when belonging to described one or more path of increase;
Step S104-8, when the one or more described Root alarm that the described disappearance alarm that disappears is concentrated, for the client trail in path, described one or more Root alarm place and the client trail in process path, described one or more Root alarm place, described one or more Root alarm of deletion from the Root alarm set of the node at their places and downstream node thereof, for the client trail in path, described one or more Root alarm place and through each alarm of the downstream node of the node of the client trail in path, described one or more Root alarm place, if described alarm can not be derived from any alarm the Root alarm set of its place node, described alarm is added described the analysis in the alarm set;
Step S104-10, when described newly-increased alarm concentrate to increase by one or more described new alarm, will described newly-increased alarm collection add described analyze to alarm gather; Step S104-12, described all that do not analyze in the alarm set in sequence analysis transmission medium layer, higher order path layer and the low order channel layer are not analyzed the correlation of alarm, and analyze the described influence of alarm to client trail of not analyzing; And step S104-14, determine Root alarm according to the analysis result of described step S104-12, and the secondary relationship of described Root alarm and non-Root alarm, to obtain described alert analysis result.
5. method according to claim 4 is characterized in that, described step S104-8 further may further comprise the steps: deleted the information and the corresponding secondary relationship thereof of described alarm the analysis result from described last time.
6. method according to claim 5 is characterized in that, the described step of not analyzing the correlation of all alarms do not analyzed in the alarm set in described sequence analysis transmission medium layer, higher order path layer and the low order channel layer may further comprise the steps:
Analyzing described analysis of each layer alarms, to determine that described analysis alarm is described Root alarm or described non-Root alarm, and determining describedly when analyzing alarm and being described Root alarm, the described Root alarm of analyzing described each layer is to the downstream node in the described path of analyzing the alarm place with to the influence through the downstream node of the client trail in described each layer in the described path of analyzing the alarm place.
7. method according to claim 6 is characterized in that, described analysis of described each layer of analysis alarmed, to determine that described analysis alarm is that the described Root alarm or the step of described non-Root alarm are further comprising the steps of:
If described the analysis alarmed and can be derived out by one of a plurality of alarms in the described Root alarm set in its path, place, then described analysis alarm is defined as non-Root alarm, and the not analysis of directly analyzing next layer is alarmed, otherwise, described analysis alarm is defined as potential Root alarm, and carries out corresponding the processing; And
Each described analysis of circular treatment is alarmed, up to the not analysis alarm of handling all layers.
8. method according to claim 7 is characterized in that, corresponding processing may further comprise the steps:
Described the analysis alarmed the node that joins described analysis alarm path, place, and in the set of the Root alarm of all downstream nodes of described node, and with the described node of not analyzing alarm path, place, and in all alarms of all downstream nodes of described node any one can be analyzed the alarm that alarm derives out and be defined as non-Root alarm from described, and at the described node of not analyzing alarm path, place, and in the set of the Root alarm of all downstream nodes of described node, if one or more described potential Root alarm can derive out from described analysis alarm, then with the deletion from described Root alarm set of described one or more described potential Root alarm.
9. method according to claim 8, it is characterized in that the described Root alarm of described each layer of described analysis may further comprise the steps to the downstream node in the described path of analyzing the alarm place with to the step through the influence of the downstream node of the client trail in described each layer in the described path of analyzing the alarm place:
Judge whether described each layer comprises client layer, if do not have, then carry out described step S104-14, otherwise, if variation has taken place for the Root alarm of last path node in each layer path set, all alarms in the Root alarm set of described path node are joined in the Root alarm set through all downstream nodes in all direct customer's layer paths in described layer path.
10. method according to claim 9, it is characterized in that, in the alarm of all downstream nodes in all direct customer's layer paths in the described layer of described process path, can be under it alarm described Root alarm set of node any one alarm of deriving out be defined as non-Root alarm.
11. method according to claim 10 is characterized in that, described step S104-14 may further comprise the steps:
If described analysis alarm can not any one alarm except that described analysis alarm self from the described Root alarm set of its place path node be derived out, then described analysis alarm is defined as Root alarm; And
If the one or more alarms during the described described Root alarm of analyzing alarm place path node is gathered can derive the described alarm of analyzing, then described one or more alarms are defined as the described Root alarm of not analyzing alarm.
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