CN101150462A - Protective switching method - Google Patents
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- CN101150462A CN101150462A CNA2007101815207A CN200710181520A CN101150462A CN 101150462 A CN101150462 A CN 101150462A CN A2007101815207 A CNA2007101815207 A CN A2007101815207A CN 200710181520 A CN200710181520 A CN 200710181520A CN 101150462 A CN101150462 A CN 101150462A
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Abstract
The invention provides a method for protection switching, which includes the following steps: step 1, when a fault detection unit of a fault detection network element detects that a fault occurs on a transmitting line, the fault detection unit gives an alarm to a protective switching controller of the fault detection network element; step 2, after the protection switching controller of the fault detection network element receives the alarm, the protection switching controller of the fault detection network element detects the protection group affected by the fault and sends requesting message for switching to non-fault detection network element according to test result; step 3, after the protection switching controller of the non-fault detection network element receives requesting message for switching, the protection switching controller of the non-fault detection network element checks the requesting message for switching and sends a response message to the fault detection network element according to test result and sends an action command of protection switching to execution elements of protection switching of all the protective group of the non-fault detection network element. Therefore, when a fault occurs, the adoption of the invention can greatly reduce protection switching protocol packet required by protective switching, thus increasing the protection switching efficiency of each protection group.
Description
Technical field
The present invention relates to optical communication network, more specifically, relate to a kind of protection reverse method.
Background technology
Present optical transfer network is more and more higher to the requirement of network survivability.Network survivability is meant network under the situation that fault takes place, and network still can be kept the ability of service continuity.(Automatic Protection Switching APS) is the important means that realizes the optical-fiber network survivability to APS.
A protection group typically refers to the set of the one group of hardware that is provided with in order to protect certain resource, generally includes APS detector, APS controller, APS actuator etc.Protected resource can be a wavelength channel, a multiplex section, also can be one group of optical fiber.Under identical topological path, have the protected resource (protected resource all is that wavelength channel or protected resource all are multiplex section or protected resource optical fiber etc.) of a plurality of same natures usually; that is to say and (for example have a plurality of protection groups; the topological structure of an annular communication network; three protection groups are wherein arranged; these three protection group character are identical, and the path is identical).This moment, these protection groups were shared same controller usually in order to save the controller resource.
When the protected resource of a protection group suffered damage, certain node can detect this infringement on the protection group.Node other interdependent nodes on the protection group that detect this infringement this moment send switching request, expect other node response request and make and replying.After interdependent node is consensus, all with protected resource switch to backup path, whole request, reply and reversed process requires to finish in the extremely short time (normally 50 milliseconds).
When if the protected resource of a plurality of protection groups of the same nature of identical topological path suffers damage simultaneously (normally since one or one group of optical fiber by unexpected segment; cause the protection group of the protection group of a plurality of wavelength channels or the protection group of a plurality of multiplex sections, a plurality of optical fibre set to suffer damage simultaneously); the a plurality of protection groups that suffer damage all will be sent switching request, and the interdependent node of each protection group all will produce and reply.Because protected resource path, the character of these protection groups are identical, in order to save controller, only use a controller on the common node.
The request of these protection groups on node, reply all and carry out, will increase the load of controller like this by same controller.Organize when many when protection, request, response message can not get timely processing, finally cause some of them protection group reversed process not finish in the short time (50 milliseconds).
In the prior art; when the protected resource of a plurality of protection groups of the same nature with identical topological path suffers damage simultaneously; each protection group all needs to send respectively relevant request, response message; this has wasted the disposal ability of protection switch controller in a large number; increase the signaling traffic when protection is switched, thereby made the protection switch time overlength.
In fact, when the protected resource of a plurality of protection groups of the same nature of identical topological path suffered damage simultaneously, each protection group request, the content of replying were except the sign of protection is different, and other field is consistent.Thus, each protection group all handle independently this protection group request, reply, be waste to the controller disposal ability.
Summary of the invention
In order to solve problem in the prior art, the present invention proposes a kind of protection reverse method, may further comprise the steps: step 1, when the fault detection unit of fault detect network element detects line failure, to the protection switch controller report and alarm of fault detect network element; Step 2, after the protection switch controller of fault detect network element was received alarm, detection was organized by the protection of fault effects, and sent switching request message according to testing result to non-fault detect network element; And step 3; the protection switch controller of non-fault detect network element is after receiving switching request message; check switching request message; and send the switching request response message to the fault detect network element, and switch performance element to the protection of all protection groups of non-fault detect network element and issue protection switching action order according to check result.
Wherein, in step 2, when detecting a plurality of protection group that is subjected to fault effects, be subjected to the switching request message of the protection group of fault effects to bind switching request message each.
In step 3, when in being checked through switching request message, having bound the message of a plurality of protection groups, the switching request response message of a plurality of protection groups is bundled in the switching request response message; And switch performance element to the protection of a plurality of protection groups of non-fault detect network element and issue protection switching action order.
In step 2, when detecting a protection group that is subjected to fault effects, with the switching request message of this protection group as switching request message.
In step 3, when in being checked through switching request message, comprising the message of a protection group, with the switching request response message of a protection group as the switching request response message; And switch performance element to the protection of a protection group of non-fault detect network element and issue protection switching action order.
Thereby; adopt the method for the present invention can be when optical-fiber network generation line fault; significantly reduce protection and switch required protection turning protocol message; thereby efficient is switched in the protection that improves each protection group; reduce protection switch time; and if the protection group number of configuration is many more, the effect that the efficient raising is switched in protection is obvious more.
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 is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart according to protection reverse method of the present invention;
Fig. 2 is the block diagram according to the protection exchanging system of a plurality of protection groups of having of the inventive method;
Fig. 3 is the process chart according to the fault detect network element protection switch controller of the inventive method;
Fig. 4 is the process chart according to the non-fault detect network element protection switch controller of the inventive method;
Fig. 5 is the block diagram according to second embodiment of the inventive method under a plurality of passage 1+1 protection group situations; And
Fig. 6 is the block diagram according to three embodiment of the inventive method under a plurality of channels share protection group situations.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
The purpose of this invention is to provide and a kind ofly can improve the optical network protection turning time method, the long problem of protection switch time when solving a plurality of protection groups and being subjected to encroaching on simultaneously.
Fig. 1 is the flow chart according to protection reverse method of the present invention.As shown in Figure 1, this method may further comprise the steps:
S102 is when the fault detection unit of fault detect network element detects line failure, to the protection switch controller report and alarm of fault detect network element;
S104, after the protection switch controller of fault detect network element was received alarm, detection was organized by the protection of fault effects, and sent switching request message according to testing result to non-fault detect network element; And
S106; the protection switch controller of non-fault detect network element is after receiving switching request message; check switching request message; and send the switching request response message to the fault detect network element, and switch performance element to the protection of all protection groups of non-fault detect network element and issue protection switching action order according to check result.
Wherein, in S104, when detecting a plurality of protection group that is subjected to fault effects, be subjected to the switching request message of the protection group of fault effects to bind switching request message each.
In S106, when in being checked through switching request message, having bound the message of a plurality of protection groups, the switching request response message of a plurality of protection groups is bundled in the switching request response message; And switch performance element to the protection of a plurality of protection groups of non-fault detect network element and issue protection switching action order.
In S104, when detecting a protection group that is subjected to fault effects, with the switching request message of this protection group as switching request message.
In S106, when in being checked through switching request message, comprising the message of a protection group, with the switching request response message of a protection group as the switching request response message; And switch performance element to the protection of a protection group of non-fault detect network element and issue protection switching action order.
Next further describe method of the present invention by the first embodiment of the present invention.The processing of fault detect network element is as follows: when line fault took place, fault detection unit detected this fault, and offers the protection switch controller of this network element with warning message in form.After switch controller is received fault warning, judge whether this fault warning has influence on a plurality of protection groups.If this fault warning will have influence on a plurality of protection groups; protect switch controller so when sending fault request message message to other network element; just all these affected protection groups are bound, promptly in a message, comprise all these affected protection group information.If this fault warning only has influence on a protection group, protect switch controller in the fault request message that other network element sends, just only to comprise the information of this protection group so.
The processing of non-fault detect network element: the protection switch controller of these network elements is checked the message that wherein whether has comprised a plurality of protection groups behind the fault request message that the protection switch controller of receiving the fault detect network element sends over.If this fault request message has comprised a plurality of protection groups, the protection switch controller of this network element is when sending response message so, and the also corresponding information that will bind these protection groups is promptly replied all bound protection groups in a message.
In the present embodiment; when the protected resource of a plurality of protection groups of the same nature with identical topological path suffers damage simultaneously; the request that each protection group is sent with reply signaling and bind; use a signaling message to replace the signaling of whole protection groups; so just can significantly reduce the signaling number, improve protection switch time.
Fig. 2 is the block diagram according to the protection exchanging system of a plurality of protection groups of having of the inventive method.As shown in Figure 2, a series of network elements are formed a plurality of protection groups.All have APS controller, tracer respectively, switch actuator at each network element internal.All receive and send protection turning protocol message between each network element.Wherein:
Tracer is used for the failure condition of detection fiber circuit, and offers the APS controller with warning message in form;
The APS controller, reception comes from the fault warning message of tracer, starting the protection turning protocol handles this alarm, and by the APS controller transmission fault request message of protection protocol massages to other network element in the protection group, receive the response message of the APS controller of other network element in the protection group simultaneously for the fault request message, and, make the decision of whether switching and how to switch according to the content of response message, be handed down to corresponding protection again and switch actuator; And
Switch actuator, reception is also carried out the optical switch switching action order that comes from this network element APS controller, finishes the protection switching action.
Based on the above-mentioned functions structure; the present invention improves the reception and the transmission of fault request message in the APS controller and response message; method by the protection group binding reduces the protocol massages quantity of protecting in the reversed process, switches efficient to improve protection, reduces protection switch time.
Fig. 3 is the process chart according to the fault detect network element protection switch controller of the inventive method.Fig. 4 is the process chart according to the non-fault detect network element protection switch controller of the inventive method.Fig. 5 is the block diagram according to second embodiment of the inventive method under a plurality of passage 1+1 protection group situations.Fig. 6 is the block diagram according to three embodiment of the inventive method under a plurality of channels share protection group situations.Below in conjunction with the handling process among Fig. 3, Fig. 4, two embodiment of Fig. 5 and Fig. 6 are carried out following description:
As shown in Figure 6, network element A breaks down to the fibre circuit of network element B direction, and network element B is exactly the fault detect network element so.
As Fig. 3, Fig. 5 and shown in Figure 6, as follows for the processing of fault detect network element:
S302, the fault warning of APS controller receiving lines, the tracer of network element B after detecting line fault, with warning message offer the APS controller in form, with the trigger protection turning protocol;
S304, the APS controller is handled fault warning;
S306, the APS controller of network element B need judge that whether this fault has influence on a plurality of protection groups, if this fault warning has influence on a plurality of groups, so just handles according to S308, otherwise handles according to S310 according to the protection configuration set situation of this network element;
S308, the APS controller of network element B sends the fault request message to the APS controller of network element A, network element C and network element D, because fault warning has influence on a plurality of protection groups, so in the fault request message that sends, to bind transmission to all affected protection groups, promptly in a fault request message, comprise all these affected protection group information;
S310, the APS controller of network element B sends the fault request message to the APS controller of network element A, network element C and network element D, because fault warning only has influence on a protection group, so only comprise the information of this protection group in the fault request message that sends;
S312, the APS controller of network element B wait for the response message of the APS controller transmission that receives protection group interior network element A, network element C and network element D; And
S314; the APS controller of network element B receives network element A in the protection group; the response message that the APS controller of network element C and network element D sends; and understand replying content of message; if the information of a plurality of protection groups of binding in the response message; the APS controller of network element B is switched performance element to the protection of this network element and is issued the switching action order so; because comprised the information of a plurality of protection groups in the response message that the APS controller of network element B is received; so must all issue protection switching action order to the performance element of switching of each protection group; if only comprised the information of a protection group in the response message; the APS controller of network element B is switched performance element to the protection of this network element and is issued the switching action order so; because only comprised the information of a protection group in the response message that the APS controller of network element B is received, so only need to issue protection switching action order just passable to the performance element of switching of this protection group.
Like this, handle just being through with, thereby the protection switching action of this network element is finished.
As shown in Figure 6, because optical-fiber line fault appears at network element A on network element B direction, so the fault detect network element is network element B, network element A, network element C and network element D in the protection group just belong to non-fault detect network element.Because network element A, network element C are identical with the implementation method of network element D, thus following be that example describes only with network element A.
As Fig. 4, Fig. 5 and shown in Figure 6, as follows for the processing of non-fault detect network element:
S402, the APS controller of network element A receive the fault request message of the APS controller transmission of network element B;
S404, the APS controller of network element A is understood this fault request message, judge the information that wherein whether has comprised a plurality of protection groups, if bound the information of a plurality of protection groups in this fault request message, so just enter S406, if only comprised the information of a protection group in this fault request message, so just carry out S410 and handle;
S406, the fault request message under a plurality of protection group binding situations is handled;
S408, the APS controller of network element A sends the fault request response message to the APS of network element B controller, owing to bound the information of a plurality of protection groups in the fault request message that the APS controller of network element A receives, so it is when the APS of network element B controller sends the fault request response message, also need all these protection groups are carried out bindings, promptly in a fault request response message, the information that comprises all these protection groups, the APS controller of network element A is switched performance element to the protection of this network element and is issued protection switching action order, owing to bound the information of a plurality of protection groups in the fault request message that the APS controller of network element A receives, so it need be switched performance element to all bound protection groups in this network element and all issue corresponding protection switching action order, end process;
S410, the fault request message of single protection group is handled; And
S412; the APS controller of network element A sends the fault request response message to the APS of network element B controller; owing to only comprise the information of a protection group in the fault request message that the APS controller of network element A receives; so it is when the APS of network element B controller sends the fault request response message; also only need be just passable to the information that comprises this protection group; the APS controller of network element A is switched performance element to the protection of this network element and is issued protection switching action order; owing to only comprise the information of a protection group in the fault request message that the APS controller of network element A receives,, it issues corresponding protection switching action order so only need this protection group in this network element switching performance element.
Like this, processing finishes, and the protection switching action of this network element is finished.
In sum; adopt the method for the present invention can be when optical-fiber network generation line fault; significantly reduce protection and switch required protection turning protocol message; thereby efficient is switched in the protection that improves each protection group; reduce protection switch time; and if the protection group number of configuration is many more, the effect that the efficient raising is switched in protection is obvious more.
Be the preferred embodiments of the present invention only below, be not limited to the present invention, 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 (5)
1. a protection reverse method is characterized in that, may further comprise the steps:
Step 1 is when the fault detection unit of fault detect network element detects line failure, to the protection switch controller report and alarm of described fault detect network element;
Step 2, after the protection switch controller of described fault detect network element was received described alarm, detection was organized by the protection of described fault effects, and sent switching request message according to testing result to non-fault detect network element; And
Step 3; the protection switch controller of described non-fault detect network element is after receiving described switching request message; check described switching request message; and send the switching request response message to described fault detect network element, and switch performance element to the protection of all described protection groups of described non-fault detect network element and issue protection switching action order according to check result.
2. protection reverse method according to claim 1 is characterized in that, in described step 2,
When detecting a plurality of protection group that is subjected to described fault effects, be subjected to the switching request message of the protection group of described fault effects to bind described switching request message each.
3. protection reverse method according to claim 2 is characterized in that, in described step 3,
When in being checked through described switching request message, having bound the message of a plurality of protection groups, the switching request response message of described a plurality of protection groups is bundled in the described switching request response message; And
Switch performance element to the protection of described a plurality of protection groups of described non-fault detect network element and issue protection switching action order.
4. protection reverse method according to claim 1 is characterized in that, in described step 2,
When detecting a protection group that is subjected to described fault effects, with the switching request message of this protection group as described switching request message.
5. protection reverse method according to claim 4 is characterized in that, in described step 3,
When in being checked through described switching request message, comprising the message of a protection group, with the switching request response message of a described protection group as described switching request response message; And
Switch performance element to the protection of the described protection group of described non-fault detect network element and issue protection switching action order.
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| CNA2007101815207A CN101150462A (en) | 2007-10-18 | 2007-10-18 | Protective switching method |
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| CNA2007101815207A CN101150462A (en) | 2007-10-18 | 2007-10-18 | Protective switching method |
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Cited By (8)
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| CN101977077A (en) * | 2010-10-12 | 2011-02-16 | 中兴通讯股份有限公司 | 1+1 protection method and failure detection device |
| CN101478427B (en) * | 2009-01-23 | 2011-08-31 | 武汉烽火网络有限责任公司 | Method for accelerating PBT tunnel failure fast switching |
| CN102223253A (en) * | 2011-06-16 | 2011-10-19 | 中兴通讯股份有限公司 | Pseudo-wire business dual-returning protective processing method, device and system |
| CN102318273A (en) * | 2011-07-28 | 2012-01-11 | 华为技术有限公司 | A kind of channel group guard method and system, node device |
| WO2012155767A1 (en) * | 2011-08-29 | 2012-11-22 | 中兴通讯股份有限公司 | Groups protection method and system |
| CN101790110B (en) * | 2009-01-22 | 2012-12-19 | 中兴通讯股份有限公司 | Device and method for coordinating and recovering automatic protection switching operation |
| WO2016058320A1 (en) * | 2014-10-15 | 2016-04-21 | 中兴通讯股份有限公司 | Method, device and system for reducing centralized protection switching time in potn system |
| CN106850268A (en) * | 2016-12-29 | 2017-06-13 | 瑞斯康达科技发展股份有限公司 | A kind of linear protection switching realizes device and method |
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- 2007-10-18 CN CNA2007101815207A patent/CN101150462A/en active Pending
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| CN101790110B (en) * | 2009-01-22 | 2012-12-19 | 中兴通讯股份有限公司 | Device and method for coordinating and recovering automatic protection switching operation |
| CN101478427B (en) * | 2009-01-23 | 2011-08-31 | 武汉烽火网络有限责任公司 | Method for accelerating PBT tunnel failure fast switching |
| CN101977077A (en) * | 2010-10-12 | 2011-02-16 | 中兴通讯股份有限公司 | 1+1 protection method and failure detection device |
| WO2012048569A1 (en) * | 2010-10-12 | 2012-04-19 | 中兴通讯股份有限公司 | 1+1 protection method and failure detection device |
| CN101977077B (en) * | 2010-10-12 | 2015-01-28 | 中兴通讯股份有限公司 | 1+1 protection method and failure detection device |
| CN102223253A (en) * | 2011-06-16 | 2011-10-19 | 中兴通讯股份有限公司 | Pseudo-wire business dual-returning protective processing method, device and system |
| CN102223253B (en) * | 2011-06-16 | 2017-09-15 | 南京中兴软件有限责任公司 | Pseudo-line service dual-homing protection processing method, apparatus and system |
| CN102318273B (en) * | 2011-07-28 | 2013-12-18 | 华为技术有限公司 | Channel group protection method and system, node device |
| CN102318273A (en) * | 2011-07-28 | 2012-01-11 | 华为技术有限公司 | A kind of channel group guard method and system, node device |
| CN102957557A (en) * | 2011-08-29 | 2013-03-06 | 中兴通讯股份有限公司 | Group protection method and system |
| WO2012155767A1 (en) * | 2011-08-29 | 2012-11-22 | 中兴通讯股份有限公司 | Groups protection method and system |
| CN102957557B (en) * | 2011-08-29 | 2018-04-20 | 中兴通讯股份有限公司 | A kind of group protection method and system |
| WO2016058320A1 (en) * | 2014-10-15 | 2016-04-21 | 中兴通讯股份有限公司 | Method, device and system for reducing centralized protection switching time in potn system |
| CN105577405A (en) * | 2014-10-15 | 2016-05-11 | 武汉中兴软件有限责任公司 | Method, apparatus, and system for reducing centralized protection switching time of POTN system |
| CN106850268A (en) * | 2016-12-29 | 2017-06-13 | 瑞斯康达科技发展股份有限公司 | A kind of linear protection switching realizes device and method |
| CN106850268B (en) * | 2016-12-29 | 2019-12-13 | 瑞斯康达科技发展股份有限公司 | device and method for realizing linear protection switching |
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