CN1512716A - Method for multilayer network to recover from - Google Patents

Method for multilayer network to recover from Download PDF

Info

Publication number
CN1512716A
CN1512716A CNA021592640A CN02159264A CN1512716A CN 1512716 A CN1512716 A CN 1512716A CN A021592640 A CNA021592640 A CN A021592640A CN 02159264 A CN02159264 A CN 02159264A CN 1512716 A CN1512716 A CN 1512716A
Authority
CN
China
Prior art keywords
fault
layer
information
recovery
interlayer
Prior art date
Application number
CNA021592640A
Other languages
Chinese (zh)
Other versions
CN1284329C (en
Inventor
纪越峰
赵继军
Original Assignee
北京邮电大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 北京邮电大学 filed Critical 北京邮电大学
Priority to CN 02159264 priority Critical patent/CN1284329C/en
Publication of CN1512716A publication Critical patent/CN1512716A/en
Application granted granted Critical
Publication of CN1284329C publication Critical patent/CN1284329C/en

Links

Abstract

This invention provides a method for multilayer network restriction to acquire multilayer network fault information realtimely and to restore interlayer fault and among-layer fault restoration according to the said fault information to determine the fault restoration initiating layer so as to realize multilayer network fault restoration to realize integral control to multilayer transfer and coordination among multilayer fault restoration strategies to eleminate discord operation among strategies due to the lack of information interaction systems.

Description

A kind of multitiered network fault recovery method
Technical field
The present invention relates to communication network technology, relate in particular to the fault recovery coordination that the multilayer under the multi-technology networks environment transmits network configuration, is a kind of multitiered network fault recovery method concretely.
Background technology
Over past ten years, since the universal and development of internet, data-centered traffic carrying capacity sustainable growth, and this has proposed new network requirement to present communication network, especially in the network survivability field.As the networking problem of key, the reliability of network is more and more important.Different technology (as: ATM, SDH and WDM technology) is integrated into and has caused a lot of compatible interlaminate problems when multilayer transmits net.Wherein main problem is the multitiered network survivability problem.
The multitiered network survivability refers to the survivability mechanism that may exist on a plurality of network layers that comprise nested and these mechanism interactional mode that influences each other [1]Single layer network survivability strategy is studied in a lot of documents [2-4]Yet in a multitiered network, using a kind of method of survivability technology on the single network layer is not best solution for the QoS that requirement is provided for all business (Quality of Service) grade.And a kind of more attractive solution is by being bundled in two kinds or more individual layer survivability mechanism introducing multilayer survivability in the same network [5-7]Under the multitiered network situation, the subject matter that multilayer survivability technology relates to is the unnecessary or even undesirable action between different survivability mechanism.This is owing to lacking the result that the coordination system causes between the Restoration Mechanism of different layers.So the coordination of heterogeneous networks interlayer is essential in recovery process.
Along with networks development, in order to satisfy different business needs, present broadband network has formed the network configuration of IP/ATM/SDH/WDM based on the multilayer tranmission techniques.This structure still is widely used in present backbone network.Four layers of survivability mechanism that all has alone in such network system.Yet such system is because new demand too complicated, defective can not satisfy backbone network such as expense is big, limited expansibility and function repeat.
In present communication network, the IP operation flow has very big randomness.Therefore it is difficult to go to satisfy such business need with traditional multitiered network structure of support voice business.So what need an optimization is the network model of main flow with data services.Some new technologies occur for this reason, wherein can reduce networking, operation, maintenance cost and network complexity by eliminating unnecessary network layer, have released the notion (IP over Optical) of supporting the direct glazing of data based on this technical background.In the multitiered network system of having simplified, TDM system (as: SONET/SDH network) will fade out, and optical transfer network transmits foundation structure as lower floor and will occur.Along with internet and transmission development of internet technology, IP network and optical-fiber network have provided the most promising solution by the notion of GMPLS (GMPLS:Generalized Multi-Protocol Label Switching) fusion for the bandwidth requirement of constantly development, intelligent requirement and management expectancy [8-9]Think that at present the network model that is suitable for most transmitting the mass data business is the structure of IP/GMPLS/Optical, as shown in Figure 1.It makes connectionless IP agreement introduce connection-oriented ability, utilizes GMPLS control plane technology can set up the label switched path of passing through network (LSP:Label Switching Path).
For the IP/GMPLS/Optical network, the configuration of survivability mechanism can be divided into two kinds.A kind of is multilayer survivability strategy independently, and another kind is the multilayer survivability strategy of coordinating.
A. multilayer survivability strategy independently
For multilayer survivability strategy independently, recovery scheme will not have the coordination system in each layer configuration and interlayer.Fault can be recovered at photosphere or IP/GMPLS layer.From the angle of carrying out and operating, the major advantage of this method is to implement simply.But shortcoming is because multi-layer protocol can provide recovery operation, and the recovery that therefore will cause walking abreast is moved, and these actions of carrying out simultaneously will cause serious consequence.For example, if fault occurs in photosphere, service layer will begin to carry out fault recovery.Because the time delay of fault detect between finishing to Restoration Mechanism, the fault of having recovered at low layer will recover to be switched to another restoration path at client layer probably.Switch for the second time and cause that the connection that has recovered is temporary transient to be interrupted and unnecessary the taking of idling-resource of client layer.The consequence that the survivability action that this nothing is coordinated brings is as follows: (a) increase fault break period (b) and make network be in the complexity that a kind of unknown state (c) increases maintenance process.So between photosphere and IP/GMPLS layer, need a kind of coordination system.
B. the multilayer survivability strategy of Xie Tiaoing
Up to the present, some cooperation policy (being also referred to as coordination strategy) have been proposed to be used in the coordination of multitiered network survivability [5-6]A cooperation policy is made up of a series of rule description, when begins the action that when finishes and how to coordinate different Restoration Mechanism such as the recovery action.Can be divided into three kinds of coordination approach according to the starting position of recovering action: from bottom to top, from top to bottom with the diagnosis formula.In list of references [5] [6] [10], advised some cooperative mechanisms and consideration, now be described below:
The selection of survivability mechanism: wish to remove the above-mentioned shortcoming of mentioning by the careful configuration of the Restoration Mechanism on the different layers.This method looks very simple, but general being difficult to realized, this be because not only upper network layer less failure detection time can cause top said problem, simultaneously also owing to exist different fault detects and switching time to make that this method is difficult to realize between the equipment of distinct device manufacturer.
Delay timer (hold-off timer): solve owing to lack very much the collaborative problem that causes the detection time on one deck and can introduce a delay timer.In this manner, detect after the fault, Restoration Mechanism must just can be moved by the latency delays timer expiry.If the protection mechanism of other layer can be recovered fault trouble shooting and do not need other layers to take what action so in time of delay.Otherwise other layer will carry out fault recovery.The advantage of this scheme is simple and strong.If significant disadvantages is that fault can not be recovered and the recovery on upper strata also will be delayed time by lower floor under some failure situations.
Recover token (recovery token):, can adopt a recovery token to go to trigger the upper strata and recover in order to improve the restorability under the low layer recovery failure scenario.Yet the shortcoming of this conception of species is a more complicated, and the existing equipment function must be changed.
Summary of the invention
The objective of the invention is to, a kind of multitiered network fault recovery method is provided, in order to realize to the integrated control of multilayer transmission and the coordination between the multitiered network fail-over policy, it can eliminate between the multilayer fail-over policy information interaction mechanism for want of and moving do inharmonious of the recovery that causes and many drawbacks of causing thus, raising multitiered network failover capability.
Technical scheme of the present invention is:
A kind of multitiered network fault recovery method is characterized in that, may further comprise the steps:
Obtain the multitiered network fault message in real time;
Determine the fault recovery initiating layer according to described fault message;
Carrying out layer internal fault recovers;
Carry out the interlayer fault recovery;
Thereby realize the multitiered network fault recovery.
The described multitiered network fault message that obtains in real time comprises: fault detect, fault location is sent signalling trouble, and the follow-up operation step is called.
Described definite fault recovery initiating layer comprises: source of trouble place layer is judged;
Determine the initiating layer of multilayer fault recovery according to recovering parameter, and send the interlayer failure indication information to this layer; Call the follow-up operation step.
The described layer internal fault that carry out recovers to comprise: adopt the mode of individual layer fault recovery that described layer internal fault recovered, and send the action supression information of recovering to other layers, restrain the action of other layers, when the fault of this layer can not be recovered, call the follow-up operation step.
Describedly carry out the interlayer fault recovery and be meant: utilize other layers to carry out the multitiered network fault recovery.
Described layer internal fault recovers may further comprise the steps:
Step C1, receive the interlayer failure indication information;
Step C2, a generation layer internal fault indication information;
Step C3, send layer internal fault indication information to layer internal fault and recover an XM;
Step C4, call a layer internal fault recovery routine, and configuration and start the delay timer of this layer;
Step C5, judge whether the time exhausts this layer delay timer, if the time does not exhaust, then the Wait-to-Restore process is carried out; If the time exhausts, execution in step C6 then;
Whether step C6, failure judgement are recovered to finish, if fault recovery is finished, then send layer internal fault recovering information and interlayer fault recovery information, and indication fault recovers to finish; If fault can not be finished, then fault recovery between execution level.
Described interlayer fault recovery may further comprise the steps:
Step D1, generation interlayer failure indication information;
Step D2, definite next layer that recovers;
Step D3, the transmission of employing interlaminar signaling pass to described recovery layer with interlayer fault recovery information;
When described recovery layer received the interlayer fault recovery information of step D3 transmission, then the execution level internal fault recovered.
The concrete steps of the method for the invention are as follows:
Describedly obtain the step that the multitiered network fault message comprises in real time and be:
Steps A 1, fault detect;
Steps A 2, fault location;
Steps A 3, send signalling trouble;
Steps A 4, call the step of determining the fault recovery initiating layer;
The step that described definite fault recovery initiating layer comprises is:
Step B1, source of trouble place layer is judged;
Step B2, determine the initiating layer of multilayer fault recovery, and send the interlayer failure indication information to this layer according to recovering parameter;
Step B3, call the step that layer internal fault recovers;
The step that described layer internal fault recovers to comprise is:
Step C1, receive the interlayer failure indication information;
Step C2, a generation layer internal fault indication information;
Step C3, send layer internal fault indication information to layer internal fault and recover an XM;
Step C4, call a layer internal fault recovery routine, and configuration and start the delay timer of this layer;
Step C5, judge whether the time exhausts this layer delay timer, if the time does not exhaust, then the Wait-to-Restore process is carried out; If the time exhausts, execution in step C5 then;
Whether step C6, failure judgement are recovered to finish, if fault recovery is finished, then send layer internal fault recovering information and interlayer fault recovery information, and indication fault recovers to finish; If fault can not be finished, the step of fault recovery between execution level then;
The step that described interlayer fault recovery comprises is:
Step D1, generation interlayer failure indication information;
Step D2, definite next layer that recovers;
Step D3, the transmission of employing interlaminar signaling pass to interlayer fault recovery information on the layer of adjacency;
When described recovery layer received the interlayer fault recovery information of D3 transmission, then repetitive sequence was carried out the Overall Steps of described step C1 to step C6;
Network Synchronization after step e, the fault recovery.
Described layer internal fault indication information is meant: the indication information that fault takes place on an operating path, and this information is transmitted to upstream or downstream neighbor node by intermediate node, the network node that recovers in this information arrives execution level;
Described layer internal fault recovering information is meant: the information that fault on indication path has been repaired, and this information is transmitted to upstream or downstream neighbor node by intermediate node, arrives up to this information and receives the network node that failure indication information is switched;
Described interlayer failure indication information is meant: an indication adjacent layer recovery mechanism postpones can not finish setup time layer failure indication information of striding of fault recovery at certain; It is directly transmitted (peer-to-peer model) or transmits (stacked model) by UNI between the IP/GMPLS photoreactive layer; This information is also referred to as the recovery token information;
Described interlayer fault recovery information is meant: an indication different layers has been repaired the information of fault; This information is directly transmitted (peer-to-peer model) or is transmitted (stacked model) by UNI between the IP/GMPLS photoreactive layer;
Described viability information is meant: in the mechanism for detecting faults between two network nodes an adopted name of certain periodically mutual information, this information provides the forward direction of last two the internodal link of same layer and back to integrity detection;
Described recovery action supression information is meant: when some layers are gone up when carrying out the fault recovery action for fault, this information will forbid that other layer moves in any recovery that the action layer recovers in the treatment progress by the layer that the GMPLS signaling information sends to other.
Described recovery parameter comprises: recovery time, recovery service granularity, recovery resource utilization etc.;
Described layer internal fault recovers XM and is meant: the source node in path;
The described next layer that recovers is meant: with adjacent upper strata or the lower floor of last fault recovery action layer;
Described adjoining course is meant: with adjacent upper strata or the lower floor of last fault recovery action layer;
Described interlaminar signaling transmission is meant: based on the interlaminar signaling transmission of the integrated control plane of GMPLS.
Beneficial effect of the present invention is: made full use of the unified control plane technology based on GMPLS, realized integrated control to the multilayer tranmission techniques, interlayer information transfer capability based on this control plane, realized the coordination between the multitiered network fail-over policy, eliminated since between the multilayer fail-over policy owing to lack the drawback that recovery that information interaction mechanism causes is moved do inharmonious and caused thus, improved the multitiered network failover capability.
Description of drawings
Fig. 1 is the IP/GMPLS/Optical network structure;
Fig. 2 is the cooperation policy figure from bottom to top based on the GMPLS signaling;
Fig. 3 is a multilayer survivability state transition diagram;
Fig. 4 is the recovering process figure based on time of delay and signaling.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described:
From the integrated multilayer survivability strategy based on interlaminar signaling, each method of the prior art all has shortcoming.So must some new methods of development.Interlaminar signaling is a kind of very promising method.This strategy is made up of the interlayer information interaction, by the interlayer information interaction, forbids another layer action for same fault in one deck action.The subject matter of this method is to create a cover interlayer signaling system, because can transmit the relevant information of fault recovery in abutting connection with the network layer standard signaling interface.Past, have only simple maintenance information, mail to client layer to allow simple fault location such as AIS information from service layer, still do not provide client layer can use about the information of service layer's protection action process [10]Yet,, can realize an integrated covering client and the control plane of service network by the GMPLS protocol frame based on the work of IETF [9]Under this framework, high-rise (such as, grouping LSP) also under the control of MPLS framework.Suppose that all layers have a GMPLS LSP to recover framework, unified control framework is convenient to the expanding policy choose opportunities.
A. based on the multilayer survivability cooperation policy of GMPLS signaling:
In the GMPLS system,, on different layers, there is not the difference of language unlike OSI Reference Model.GMPLS is the all-purpose language of IP/GMPLS layer photoreactive layer.Can create a general controls plane based on GMPLS.The equipment of different layers can be realized information interaction by unified signaling.Use unified signaling, multilayer survivability cooperation information can be striden layer and be carried out the coordination of the Restoration Mechanism of different layers [11-14]As shown in Figure 2.
In strategy from bottom to top, physical layer (optical transport layer) triggers the optical channel Restoration Mechanism.If this mechanism is not recovered in recovery time to connect in given maximum duration, the upper strata is recovered and will be triggered.For this reason, the delay timer thresholding that recovers of upper strata needs initial configuration and reappraises during fault each time at network.Strategy from bottom to top compares with strategy from top to bottom that to be considered to recovery time usually the shortest, because recover action as much as possible near fault.
In this process, need following signaling information:
Layer internal fault indication information (Intra-layer FIS:Intra-layer Fault Indication Signal): the indication information that fault takes place on an operating path.It is transmitted to upstream or downstream neighbor node by intermediate node, the network node that recovers in this information arrives execution level.
Layer internal fault recovering information (Intra-layer FRS:Intra-layer Fault Recovery Signal): the information that the fault of an indication on the path repaired.Be similar to a layer internal fault indication information, it is given upstream or downstream neighbor node by intermediate node, arrives up to this information and receives the network node that failure indication information is switched.
Interlayer failure indication information (Inter-layer FIS:Inter-layer Fault Indication Signal): also be called the recovery token information.An indication low layer recovery mechanism postpones can not finish setup time layer failure indication information of striding of fault recovery at certain.It is directly transmitted (peer-to-peer model) or transmits (stacked model) by UNI between the IP/GMPLS photoreactive layer.
Interlayer fault recovery information (Inter-layer FRS:Inter-layer Fault Recovery Signal): an indication different layers has been repaired the information of fault.Be similar to the interlayer failure indication information, it is directly transmitted (peer-to-peer model) or transmits (stacked model) by UNI between the IP/GMPLS photoreactive layer.
Survival information (Liveness Message): in the mechanism for detecting faults between two network nodes periodically mutual certain information, an adopted name of this information.It provides the forward direction of last two the internodal link of same layer and back to integrity detection.
Recover action prohibition information (RAIS:Recovery action inhibition signal): when some layers are gone up when carrying out the fault recovery action for fault, this information will forbid that other layer moves in any recovery that the action layer recovers in the treatment progress by the layer that GMPLS information sends to other.
These informational needs are transmitted by signaling mechanism, and in the GMPLS framework agreement, the CR-LDP ﹠ RSVP-TE signaling has been done some expansion for fault recovery [15-16]So, can further expand RSVP-TE or CR-LDP agreement to support multilayer survivability strategy with the mode that is similar to individual layer fault recovery expansion.
B. based on the recovering process of GMPLS signaling:
Consider because the correlative factor that fault causes, (such as, fault probability of occurrence, coverage, recovery time etc.) we adopt from bottom to top strategy to explain integrated survivability strategy based on the GMPLS interlaminar signaling multilayer coordination system.This situation can be represented the fault recovery process with state transition graph as shown in Figure 3.
Here, S I, S LR, S HR, S RSAnd S NIt is the main state of multilayer survivability process.Be described below:
S I: idle condition, this state lower network normal operation can detect survival environment and fault, can receive signalling trouble or indication information.
S LR: low layer returns to form, and under this state, the low layer Restoration Mechanism is by E Failured occurredTrigger, and fault recovery is only carried out at low layer.
S HR: high level returns to form, and this state is after the low layer recovery is overtime, by E Time expiredTrigger.
S RS: recover success status.Process will enter this state after removing fault recovery.
S N: network normal condition, fault are removed the back state will be from S by Event triggered (such as, fault clearance, network is synchronously heavy) RSBe transformed into S NUnder the default condition, S NAutomatically be transformed into S IState.
Here E Liveness, E Failure occurrod, E Recovery success, E Timer expired, and E Failure clearedIt is the main incident in the multilayer recovering process.Possible event description is as follows:
E Liveness: this periods of events detection network state is a process of proper network.
E Failure occurred: fault generation incident, this Event triggered is recovered action.
E Recovery success: this incident is shown in fault recovery success on network one deck.
E Timer expired: but this incident is used to illustrate the delay timeout fault also not remove, and it will trigger the recovery action of another layer.
E Failure clearedThis incident will trigger S NState, it can make network network normalization after fault recovery.
Provide details with as shown in Figure 3 state transition diagram based on the IP/GMPLS/Optical recovering process of GMPLS signaling.In this process, introduced delay timer between the IP/GMPLS layer photoreactive layer, recover token and GMPLS signaling.Main thought is to use the nested time that is provided by delay timer to go to finish the cooperation of different layers.Above-mentioned cooperative signaling information is sent by the GMPLS signaling.Process as shown in Figure 4.
Break down in network, multilayer survivability strategy is with detection failure.Simultaneously, layer internal fault indication information sends to the failure path ingress, carries out photosphere and recovers action.Delay timer starts simultaneously, recovers prohibition information and will send to another layer to forbid the recovery action of another layer.At different layers is set different time of delay.In one-level recovery policy (such as photosphere), if fault can be finished in time of delay, delay timer stops.Layer internal fault recovering information will be sent out to inform to be recovered to finish.If fault recovery is not finished in time of delay, delay timer is overtime.The interlayer failure indication information will be sent to last layer to trigger the Restoration Mechanism on upper strata with the form of recovering token by the GMPLS signaling.Otherwise other Restoration Mechanism is in wait state always has time enough to finish recovering process up to low layer.If fault effects is still received in the connection on upper strata after time of delay, the upper strata is recovered and will be excited.The key of this process is to carry out the information transmission of malfunction and operate condition with interlaminar signaling.In this case, process can finish by the relevant relevant signaling of signaling protocol of the integrated control plane of GMPLS (such as, CR-LDP, RSVP-TE and LMP).
The concrete step of implementing of the present invention is:
Obtain the multitiered network fault message in real time;
Determine the fault recovery initiating layer according to described fault message;
Carrying out layer internal fault recovers;
Carry out the interlayer fault recovery;
Thereby realize the multitiered network fault recovery.
Describedly obtain the step that the multitiered network fault message comprises in real time and be:
Steps A 1, fault detect;
Steps A 2, fault location;
Steps A 3, send signalling trouble;
Steps A 4, call the step of determining the fault recovery initiating layer; Wherein: can be the solution of each independent stratum configuration step A1 to steps A 4;
The step that described definite fault recovery initiating layer comprises is:
Step B1, source of trouble place layer is judged;
Step B2, determine the initiating layer of multilayer fault recovery, and send the interlayer failure indication information to this layer according to recovering parameter;
Step B3, call the step that layer internal fault recovers;
The step that described layer internal fault recovers to comprise is:
Step C1, receive the interlayer failure indication information;
Step C2, a generation layer internal fault indication information;
Step C3, send layer internal fault indication information to layer internal fault and recover an XM;
Step C4, call a layer internal fault recovery routine, and configuration and start the delay timer of this layer;
Step C5, judge whether the time exhausts this layer delay timer, if the time does not exhaust, then the Wait-to-Restore process is carried out; If the time exhausts, execution in step C6 then;
Whether step C6, failure judgement are recovered to finish, if fault recovery is finished, then send layer internal fault recovering information and interlayer fault recovery information, and indication fault recovers to finish; If fault can not be finished, the step of fault recovery between execution level then;
The step that described interlayer fault recovery comprises is:
Step D1, generation interlayer failure indication information;
Step D2, definite next layer that recovers;
Step D3, the transmission of employing interlaminar signaling pass to interlayer fault recovery information on the layer of adjacency;
When described recovery layer received the interlayer fault recovery information of D3 transmission, then repetitive sequence was carried out the Overall Steps of described step C1 to step C6;
Network Synchronization after step e, the fault recovery.
Described layer internal fault indication information is meant: the indication information that fault takes place on an operating path, and this information is transmitted to upstream or downstream neighbor node by intermediate node, the network node that recovers in this information arrives execution level;
Described layer internal fault recovering information is meant: the information that fault on indication path has been repaired, and this information is transmitted to upstream or downstream neighbor node by intermediate node, arrives up to this information and receives the network node that failure indication information is switched;
Described interlayer failure indication information is meant: an indication adjacent layer recovery mechanism postpones can not finish setup time layer failure indication information of striding of fault recovery at certain; It is directly transmitted (peer-to-peer model) or transmits (stacked model) by UNI between the IP/GMPLS photoreactive layer; This information is also referred to as the recovery token information;
Described interlayer fault recovery information is meant: an indication different layers has been repaired the information of fault; This information is directly transmitted (peer-to-peer model) or is transmitted (stacked model) by UNI between the IP/GMPLS photoreactive layer;
Described viability information is meant: in the mechanism for detecting faults between two network nodes an adopted name of certain periodically mutual information, this information provides the forward direction of last two the internodal link of same layer and back to integrity detection;
Described recovery action supression information is meant: when some layers are gone up when carrying out the fault recovery action for fault, this information will forbid that other layer moves in any recovery that the action layer recovers in the treatment progress by the layer that the GMPLS signaling information sends to other.
Described recovery parameter comprises: recovery time, recovery service granularity, recovery resource utilization etc.;
Described layer internal fault recovers XM and is meant: the source node in path;
The described next layer that recovers is meant: with adjacent upper strata or the lower floor of last fault recovery action layer;
The layer of described adjacency is meant: with adjacent upper strata or the lower floor of last fault recovery action layer;
Described interlaminar signaling transmission is meant: based on the interlaminar signaling transmission of the integrated control plane of GMPLS.
Beneficial effect of the present invention is: made full use of the unified control plane technology based on GMPLS, realized integrated control to the multilayer tranmission techniques, interlayer information transfer capability based on this control plane, realized the coordination between the multitiered network fail-over policy, eliminated since between the multilayer fail-over policy because lack that recovery that information interaction mechanism causes moves inharmonious and the drawback that causes have thus improved the multitiered network failover capability.
Above embodiment only is used to the present invention is described but not is used to limit the present invention.
List of references:
[1]Lucent?technologies.Multi-Layer?Survivability.White?paper.November?1999
[2]J.Manchester,P.Bonenfant,C.Newton.The?Evolution?of?Transport?NetworkSurvivability.?IEEE?communications?Magazine,August?1999
[3]Z.?Dongyuan,S.Subramaniam.?Survivability?in?Optical?Networks.IEEE?Network,November/December?2000
[4]A.Fumagalli,L.Valcarenghi.IP?Restoration?VS.WDM?Protection:Is?There?anOptimal?Choice?.IEEE?Network,November/December?2000
[5]L.Nederlof,K.Struyve,C.O’Shea,H.Misser,D.Yonggan,and?B.Tamayo.End-to-End?Survivable?Broadband?Networks.IEEE?communications?Magazine,September?1995.
[6]P.Demeester,M.Gryseels,A.Autenrieth?et?al..Resilience?in?Multilayer?Networks.IEEE?communications?Magazine,August?1999
[7]D.colle,S.D.Maesschalck,C.Develder?et?al.Data-Centric?Optical?Networks?andTheir?Survivability.IEEE?Journal?on?Selected?Areas?in?Communications,January?2002
[8]D.O.Awduche,Y.ReKhter,J.Drake,R.Coltum.Multi-Protocol?Lambda?Switching:Combining?MPLS?Traffic?Control?with?Optical?Crossconnects.IFTF?draft,draft-awduche-mpls-te-optical-02.txt,July?2000
[9]P.A.Smith,D.Awduche,A.Banerjee?et?al..Generalized?Multi-Protocol?LabelSwitching(GMPLS)Architecture.IFTF?draft,draft-ietf-ccamp-gmpls-architecture-03.txt,August?2002
[10]G.?Ferraris,M.?Quagliotti,S.Ragazzi?et?al.Integration?of?IP?over?Optical?Networks:Networking?and?Management.?The?report?of?EURESCOM?Participants?in?Project?P918,2001.
[11]H.Zhang,A.Durresi.Differentiated?Multi-Layer?Survivability?in?IP/WDM?Networks.Proceedings?of?8th?IEEE/IFIP?Network?Operations?and?Management?Symposium.NOMS?2002.Florence,Italy,pp.?681-694,April?2002
[12]A.Achim.Differentiated?Multilayer?Resilience?in?IP?over?WDM?Networks.Proceedings?of?8th?IEEE/IFIP?Network?Operations?and?Management?Symposium.NOMS?2002.Florence,Italy,pp.1-10,April?2002
[13]D.Papadimitriou,J.Jones,D.Basak,R.Hartani.Packet-Optical?Escalation?Strategies-Framework.IFTF?draft,draft-pbh-packet-optical-escalation-02.txt,Nov.2001
[14]K.Owens,V.Sharma,S.?Makam?et?al..?A?Path?Protection/Restoration?Mechanism?forMPLS?Networks.IFTF?draft,draft-chang-mpls-path-protection-03.txt,July?2001
[15]P.A.Smith,A.Banerjee,L.Berger?et?al..Generalized?MPLS?Signaling-CR-LDPExtensions.IFTF?draft,draft-ietf-mpls-generalized-cr-ldp-07.txt,August?2002
[16]P.A.Smith,A.Banerjee,L.Berger?et?al..Generalized?MPLS?Signaling-RSVP-TEExtensions.IFTF?draft,draft-ietf-mpls-generalized-rsvp-te-09.txt,Sep.2002

Claims (10)

1. a multitiered network fault recovery method is characterized in that, may further comprise the steps:
Obtain the multitiered network fault message in real time;
Determine the fault recovery initiating layer according to described fault message;
Carrying out layer internal fault recovers;
Carry out the interlayer fault recovery;
Thereby realize the multitiered network fault recovery.
2. method according to claim 1 is characterized in that, the described multitiered network fault message that obtains in real time comprises:
Fault detect, fault location is sent signalling trouble, and the follow-up operation step is called.
3. method according to claim 1 is characterized in that, described definite fault recovery initiating layer comprises:
Source of trouble place layer is judged;
Determine the initiating layer of multilayer fault recovery according to recovering parameter, and send the interlayer failure indication information to this layer; Call the follow-up operation step.
4. method according to claim 1, it is characterized in that, the described layer internal fault that carry out recovers to comprise: adopt the mode of individual layer fault recovery that described layer internal fault recovered, and send the action supression information of recovering to other layers, restrain the action of other layers, when the fault of this layer can not be recovered, call the follow-up operation step.
5. method according to claim 1 is characterized in that, describedly carries out the interlayer fault recovery and is meant: utilize other layers to carry out the multitiered network fault recovery.
6. method according to claim 4 is characterized in that, described layer internal fault recovers may further comprise the steps:
Step C1, receive the interlayer failure indication information;
Step C2, a generation layer internal fault indication information;
Step C3, send layer internal fault indication information to layer internal fault and recover an XM;
Step C4, call a layer internal fault recovery routine, and configuration and start the delay timer of this layer;
Step C5, judge whether the time exhausts this layer delay timer, if the time does not exhaust, then the Wait-to-Restore process is carried out; If the time exhausts, execution in step C6 then;
Whether step C6, failure judgement are recovered to finish, if fault recovery is finished, then send layer internal fault recovering information and interlayer fault recovery information, and indication fault recovers to finish; If fault can not be finished, then fault recovery between execution level.
7. method according to claim 5 is characterized in that, described interlayer fault recovery may further comprise the steps:
Step D1, generation interlayer failure indication information;
Step D2, definite next layer that recovers;
Step D3, the transmission of employing interlaminar signaling pass to described recovery layer with interlayer fault recovery information;
When described recovery layer received the interlayer fault recovery information of step D3 transmission, then the execution level internal fault recovered.
8. method according to claim 1 is characterized in that,
Describedly obtain the step that the multitiered network fault message comprises in real time and be:
Steps A 1, fault detect;
Steps A 2, fault location;
Steps A 3, send signalling trouble;
Steps A 4, call the step of determining the fault recovery initiating layer;
The step that described definite fault recovery initiating layer comprises is:
Step B1, source of trouble place layer is judged;
Step B2, determine the initiating layer of multilayer fault recovery, and send the interlayer failure indication information to this layer according to recovering parameter;
Step B3, call the step that layer internal fault recovers;
The step that described layer internal fault recovers to comprise is:
Step C1, receive the interlayer failure indication information;
Step C2, a generation layer internal fault indication information;
Step C3, send layer internal fault indication information to layer internal fault and recover an XM;
Step C4, call a layer internal fault recovery routine, and configuration and start the delay timer of this layer;
Step C5, judge whether the time exhausts this layer delay timer, if the time does not exhaust, then the Wait-to-Restore process is carried out; If the time exhausts, execution in step C6 then;
Whether step C6, failure judgement are recovered to finish, if fault recovery is finished, then send layer internal fault recovering information and interlayer fault recovery information, and indication fault recovers to finish; If fault can not be finished, the step of fault recovery between execution level then;
The step that described interlayer fault recovery comprises is:
Step D1, generation interlayer failure indication information;
Step D2, definite next layer that recovers;
Step D3, the transmission of employing interlaminar signaling pass to interlayer fault recovery information on the layer of adjacency;
When described recovery layer received the interlayer fault recovery information of D3 transmission, then repetitive sequence was carried out the Overall Steps of described step C1 to step C6;
Network Synchronization after step e, the fault recovery.
9. method according to claim 8, it is characterized in that, described layer internal fault indication information is meant: the indication information that fault takes place on an operating path, this information is transmitted to upstream or downstream neighbor node by intermediate node, the network node that recovers in this information arrives execution level;
Described layer internal fault recovering information is meant: the information that fault on indication path has been repaired, and this information is transmitted to upstream or downstream neighbor node by intermediate node, arrives up to this information and receives the network node that failure indication information is switched;
Described interlayer failure indication information is meant: an indication adjacent layer recovery mechanism postpones can not finish setup time layer failure indication information of striding of fault recovery at certain; It is directly transmitted between the IP/GMPLS photoreactive layer or transmits by UNI; This information is also referred to as the recovery token information;
Described interlayer fault recovery information is meant: an indication different layers has been repaired the information of fault; This information is directly transmitted between the IP/GMPLS photoreactive layer or is transmitted by UNI;
Described viability information is meant: in the mechanism for detecting faults between two network nodes an adopted name of certain periodically mutual information, this information provides the forward direction of last two the internodal link of same layer and back to integrity detection;
Described recovery action supression information is meant: when some layers are gone up when carrying out the fault recovery action for fault, this information will forbid that other layer moves in any recovery that the action layer recovers in the treatment progress by the layer that the GMPLS signaling information sends to other.
10. method according to claim 8 is characterized in that, described recovery parameter comprises: recovery time, recovery service granularity, recovery resource utilization etc.;
Described layer internal fault recovers XM and is meant: the source node in path;
The described next layer that recovers is meant: with adjacent upper strata or the lower floor of last fault recovery action layer;
Described adjoining course is meant: with adjacent upper strata or the lower floor of last fault recovery action layer;
Described interlaminar signaling transmission is meant: based on the interlaminar signaling transmission of the integrated control plane of GMPLS.
CN 02159264 2002-12-30 2002-12-30 Method for multilayer network to recover from CN1284329C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 02159264 CN1284329C (en) 2002-12-30 2002-12-30 Method for multilayer network to recover from

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 02159264 CN1284329C (en) 2002-12-30 2002-12-30 Method for multilayer network to recover from

Publications (2)

Publication Number Publication Date
CN1512716A true CN1512716A (en) 2004-07-14
CN1284329C CN1284329C (en) 2006-11-08

Family

ID=34237400

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 02159264 CN1284329C (en) 2002-12-30 2002-12-30 Method for multilayer network to recover from

Country Status (1)

Country Link
CN (1) CN1284329C (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100373866C (en) * 2004-12-24 2008-03-05 中兴通讯股份有限公司 Method of network fault recovery crossing over connections in multiple domains
WO2008119294A1 (en) * 2007-03-29 2008-10-09 Huawei Technologies Co., Ltd. Method and equipment for restoring network business
CN102186124A (en) * 2011-04-29 2011-09-14 东北大学 Utility-based interlayer coordination method in WDM (Wavelength Division Multiplexing) optical network
CN101621497B (en) * 2008-06-30 2012-11-21 华为技术有限公司 Method and system for service protection in multiple layers of networks
CN101715149B (en) * 2009-07-21 2013-01-23 北京邮电大学 Method and device for restoring parallel cross-domain fault of multilayer and multi-domain distributed optical network
CN104243015A (en) * 2014-10-11 2014-12-24 北京邮电大学 Fault recovery method of user network interface (UNI) of optical network
CN106357529A (en) * 2015-07-21 2017-01-25 中国移动通信集团公司 Method, device and system for protecting services in multilayer network
WO2017012431A1 (en) * 2015-07-21 2017-01-26 中国移动通信集团公司 Service protection method, device, and system in multi-layer network
CN106685682A (en) * 2015-11-10 2017-05-17 中国移动通信集团公司 Fault processing method, network device and system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101626317A (en) * 2008-07-07 2010-01-13 华为技术有限公司 Method, system and device for link failure recovery

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100373866C (en) * 2004-12-24 2008-03-05 中兴通讯股份有限公司 Method of network fault recovery crossing over connections in multiple domains
WO2008119294A1 (en) * 2007-03-29 2008-10-09 Huawei Technologies Co., Ltd. Method and equipment for restoring network business
CN101621497B (en) * 2008-06-30 2012-11-21 华为技术有限公司 Method and system for service protection in multiple layers of networks
CN101715149B (en) * 2009-07-21 2013-01-23 北京邮电大学 Method and device for restoring parallel cross-domain fault of multilayer and multi-domain distributed optical network
CN102186124A (en) * 2011-04-29 2011-09-14 东北大学 Utility-based interlayer coordination method in WDM (Wavelength Division Multiplexing) optical network
CN102186124B (en) * 2011-04-29 2014-01-15 东北大学 Utility-based interlayer coordination method in WDM (Wavelength Division Multiplexing) optical network
CN104243015B (en) * 2014-10-11 2018-04-27 北京邮电大学 A kind of optical-fiber network User Network Interface fault recovery method
CN104243015A (en) * 2014-10-11 2014-12-24 北京邮电大学 Fault recovery method of user network interface (UNI) of optical network
WO2017012431A1 (en) * 2015-07-21 2017-01-26 中国移动通信集团公司 Service protection method, device, and system in multi-layer network
CN106411539A (en) * 2015-07-21 2017-02-15 中国移动通信集团公司 Business protection method, device and system in multilayer networks
CN106357529A (en) * 2015-07-21 2017-01-25 中国移动通信集团公司 Method, device and system for protecting services in multilayer network
CN106411539B (en) * 2015-07-21 2019-07-12 中国移动通信集团公司 The method, apparatus and system of service protection in a kind of multitiered network
CN106685682A (en) * 2015-11-10 2017-05-17 中国移动通信集团公司 Fault processing method, network device and system

Also Published As

Publication number Publication date
CN1284329C (en) 2006-11-08

Similar Documents

Publication Publication Date Title
Ali et al. On the vision of complete fixed-mobile convergence
CN101141330B (en) Method, system and equipment to establish BFD detection for LSP tunnel
US7526202B2 (en) Architecture and method for framing optical control and data bursts within optical transport unit structures in photonic burst-switched networks
Bonaventure et al. Achieving sub-50 milliseconds recovery upon BGP peering link failures
US7310480B2 (en) Adaptive framework for closed-loop protocols over photonic burst switched networks
US7266296B2 (en) Architecture and method for framing control and data bursts over 10 Gbit Ethernet with and without WAN interface sublayer support
De Maesschalck et al. Intelligent optical networking for multilayer survivability
Gerstel et al. Optical layer survivability-an implementation perspective
EP2517402B1 (en) Decoupled cascaded mixers architecture and related methods
Goyal et al. Improving convergence speed and scalability in OSPF: A survey
KR101498320B1 (en) Multi-point and rooted multi-point protection switching
US8289843B2 (en) Service failure recovery method and system
CN1170391C (en) High-speed packet transmission system
CN1188985C (en) Jam control system of voice network through internet protocol
CN1277395C (en) Communication system
US7483631B2 (en) Method and apparatus of data and control scheduling in wavelength-division-multiplexed photonic burst-switched networks
Huang et al. Building reliable MPLS networks using a path protection mechanism
EP1898584A1 (en) A method and device for recovering the share mesh network
CN101160761B (en) Link failure restoring method and apparatus
CN1137570C (en) Tone detection elimination
JP2005252368A (en) Path calculation system and method, and communication node
US20030189920A1 (en) Transmission device with data channel failure notification function during control channel failure
CN101064682A (en) Optical network terminal and its packet processing method thereof
CN1244212C (en) Implicit shared bandwidth protection for fast reroute
CN1741546A (en) Method of telecommunications call record correlation providing a basis for quantitative analysis of telecommunications call traffic routing

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
EXPY Termination of patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20061108

Termination date: 20141230