CN102984605A - Method and device for fault handing of optical channel bandwidth - Google Patents
Method and device for fault handing of optical channel bandwidth Download PDFInfo
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Abstract
The invention discloses a method and a device for fault handing of an optical channel bandwidth and belongs to the field of photo-communication. The method for fault handing of the optical channel bandwidth comprises that whether high order time slot adjustment is completed in a link which is out of order in an optical channel data optical data unit (ODU) flex path is judged, when a condition that the high order time slot adjustment is completed in the link is taken as a judge result, in the ODU flex path, all the bandwidths of the links are triggered to be adjusted to a state after all the links are adjusted on condition that the links are not out of order, and the flex means a random bit rate. Adaptive handing ability for faults by the ODU flex lossless adjustment is expanded, the phenomenon that bandwidths of all the sections are disaccorded with states before the adjustment or after the adjustment in the ODU flex path when a fault is caused is eliminated, the effect that when the fault is caused, the ODU flex path can still normally be adjusted to finish or recover the state before the adjustment is ensured, and the adapting ability is strong.
Description
Technical field
The present invention relates to optical communication field, particularly a kind of fault handling method of optical channel bandwidth and device.
Background technology
OTN (Optical transport network, optical transfer network) as the core technology of transport network of future generation, the technical specification that comprises electricity layer photoreactive layer, possesses abundant OAM (Operation Administration and Maintenance, network management), powerful TCM (Tandem Connection Monitoring, Tandem Connection Monitor) ability and out-of-band FEC (Forward Error Correction), forward error correction) ability, can realize flexible dispatching and the management of large capacity business, day by day become the mainstream technology of Backbone Transport Network.At the electric treatment layer, powerful " digital wrapper " structure of OTN technology definition can realize the management and supervision to client signal.
The OTN frame structure sees also Fig. 1, the OTN frame is 4080 * 4 modular construction, comprise FAS, OTUkOH (Optical Channel Transport Unit-k Overhead, optical channel transmission unit k expense), ODUk OH (Optical Channel Data Unit-k Overhead, Optical Channel Data Unit-k k expense), OPUk OH (Optical Channel Payload Unit-k Overhead, optical channel Payload Unit k expense), OPUk (Optical Channel Payload Unit-k, optical channel Payload Unit k) and FEC (Forward Error Correction, forward error correction) byte.FAS (Frame Alignment Signal, frame alignment byte) wherein provides the function of frame synchronization location.OTUk OH is the Optical Channel Transport Unit-k overhead byte, provides the Optical Channel Transport Unit-k level other Network Management Function.ODUk OH is the Optical Channel Data Unit-k overhead byte, and the maintenance and operation function is provided.OPUk OH is optical channel Payload Unit overhead byte, provides client signal adaptive function.OPUk is the optical channel Payload Unit, and the function of client signal carrying is provided.FEC is the forward error correction byte, and error detector and error correction are provided.Coefficient k represents the bit rate and different types of OPUk, ODUk and the OTUk that support.K=1 represents that bit rate is 2.5Gbit/s, and k=2 represents that bit rate is 10Gbit/s, and k=3 represents that bit rate is 40Gbit/s, and k=4 represents that bit rate is 100Gbit/s, and k=flex represents that its bit rate is arbitrary size.
ODUflex keeps original ODUk frame structure, can carry the professional and bag business of CBR (Constant bit rate, fixed bit rate) of arbitrary velocity.For bag is professional, by GFP-F (Frame-Mapped Generic framing Procedure, Generic Framing Procedure based on the frame mapping) encapsulates, be mapped to afterwards the OPUflex payload section, then ODUflex is passed through GMP (Generic framing Procedure, Generic Framing Procedure) is mapped to HO ODTUk.M (Higher Order, high-order), HO ODTUk.M is multiplexed into HO OPUk (Higher Order Optical Channel Payload Unit-k, high rank optical channel Payload Unit k), add corresponding expense and be encapsulated as HO ODUk (Higher Order Optical Channel Data Unit-k, high rank optical channel data unit k), final by HO OTUk (Higher Order Optical Channel Transport Unit-k, high-order optical channel transmission unit k) carries transmission, 2≤k≤4 wherein, M represents ODUflex and has taken M time slot among the HO OPUk.ODUflex speed is chosen as M*TS speed, 1≤M≤80 wherein, and TS (Time Slot, time slot) speed is the time slot speed of HO OPUk.
ODUflex speed has diversity, so ODUflex can carry the bag business of arbitrary velocity.When the bag of carrying different rates was professional, ODUflex speed was chosen corresponding speed grade (corresponding several time slots of the HO of taking OPUk), as shown in Figure 2, HO OPU2 comprises eight 1.25G time slots, ODUflex takies 3 time slots of HO OPU2, i.e. TS1, TS2 and TS4.
Because the bag service traffics have the characteristic of non real-time variation, therefore the bag business is transformable to the demand of the bandwidth of service layer's container.Operator wishes and can dynamically adjust service layer's bandwidth chahnel according to customer service grade and customer data flow needs, not only improves the service quality of operator, and can take full advantage of its resource and differentiated service is provided for more client.Therefore, in different time sections, ODUflex need to provide different bandwidth to satisfy the professional different flow of bag, and need to carry out the adjustment of ODUflex bandwidth chahnel in the professional continuous situation of bag.This that is to say the G.hao agreement (ODUflex can't harm the bandwidth adjustment) that current I TU-T is formulating.
HAO (Hitless Adjustment of ODUflex, the harmless adjustment of ODUflex) the agreement solution is by LCR (Link Connection Resize, link is adjusted) and BWR (Bandwidth Resize, bandwidth is adjusted) finish the harmless bandwidth adjustment of ODUflex, wherein LCR is responsible for the time slot adjustment of each section HO OPUk in the ODUflex path, and BWR is responsible for end to end ODUflex bit rate adjustment.
Point-to-point symmetric bandwidth ODUflex access diagram as shown in Figure 3, the ODUflex path is from the source node to the destination node, two intermediate nodes have been passed through in the centre, namely formed by 3 Link sections and 2 Matrix sections, Link section wherein: in the HO ODU passage of carrying ODUflex, LC (Link Connection, link) section between two network nodes that link to each other arbitrarily; The Matrix section: in the HO ODU passage of carrying ODUflex, cross matrix linkage section in the arbitrary network node; Link section and Matrix section are the LC that describes in the literary composition.
From source node to the destination node direction, in source node, by GFP-F the bag business is mapped into ODUflex, by GMP ODUflex is mapped into HO ODTU2.2 (in Fig. 3 afterwards, make its TS1 that takies HO ODU2, TS4, only for illustrating, do not limit herein).At first intermediate node, by GMP ODUflex is mapped out from HO ODU2 solution, cross afterwards intersection, again ODUflex is mapped to HO ODTU3.2 at the cross matrix opposite side (in Fig. 3 by GMP, make it take TS5, the TS12 of HO ODU3, only for illustrating, do not limit) herein.At second intermediate node, by GMP ODUflex is mapped out from HO ODU3 solution, cross afterwards intersection, again ODUflex is mapped to HO ODTU2.2 at the cross matrix opposite side (in Fig. 3 by GMP, make its TS4 that takies HO ODU2, TS5, only for illustrating, do not limit) herein.In destination node, by GMP ODUflex is mapped out from HO ODU2 solution, parse from ODUflex by the GFP-F business of will wrapping afterwards.In like manner, from destination node to the source node direction, it is professional to transmit bag according to same bandwidth distribution and path.
The HAO agreement of prior art can accomplish that ODUflex can't harm the bandwidth adjustment, finishes the harmless bandwidth adjustment of ODUflex by LCR and BWR.For example, if realize the ODUflex path among Fig. 3 be can't harm the bandwidth adjustment, adopt the HAO agreement of prior art, wherein LCR is responsible for the bandwidth adjustment of each Link section in the ODUflex path and Matrix section, and the TS that finishes the HO OPUk that ODUflex takies adjusts; BWR is responsible for source node to the ODUflex bit rate adjustment of destination node, at first carries out detection of connectivity, carries out afterwards the adjustment of ODUflex bit rate.
LCR and BWR finish the harmless bandwidth adjustment of ODUflex by the adjustment agreement of definition, LCR comprises CTRL (control, control field), TPID (Tributary Port ID, tributary port ID), TSGS (Tributary Slot Group Status, the state of branch road group) field; BWR comprises TSCC (Tributary Slot Connectivity Check, the branch road detection of connectivity), NCS (Network Connection Status, the network answer state), BWD_IND (Bandwidth Resize Indicator, bandwidth adjustment indication), RP (Protocol indicator, protocol-identifier) field.Wherein RP, TSCC, CTRL, TPID, TSGS place the TSOH of HO OPUk, are positioned at 15 row 1,2,3 row, and BWD_IND, NCS place the OPUflex expense, and shown in Fig. 4 a and Fig. 4 b, Fig. 4 a represents to place the adjustment expense schematic diagram of OPUflex expense; Fig. 4 b represents to place the adjustment expense schematic diagram of HO OPUk expense.
Wherein, CTRL takies 2bits, is used for transmitting control signal, 00 expression IDLE signaling (being idle signaling), 01 expression ADD signaling (namely increasing signaling), 10 expression REMOVE signalings (being mobile signaling protocol), 11 expression NORM signalings (being hand off signaling); TPID takies 7bits, and expression tributary port ID is used for representing which group is current TS belong to; TSGS takies 1bit, 1 expression OK state, and 0 expression NOT-OK state is produced by egress, is used for confirming the egress current state to source; TSCC takies 1bit, is used for carrying out detection of connectivity, is produced by source node, is set to 1 when carrying out detection of connectivity; NCS takies 1bit, for the indication of replying of detection of connectivity, is produced by destination node, based on the different TSSC values that receive, produces and replys accordingly indication; BWD_IND takies 2bit, is used to indicate the ODUflex bit rate and begins to adjust and finish; RP takies 1bit, and what be used to indicate transmission is to adjust protocol overhead; CRC5 and CRC3 are cyclic redundancy check (CRC) code; RES is for keeping the position.
When prior art is carried out the harmless adjustment of bandwidth chahnel under the fault-free scene, be divided into bandwidth increase and bandwidth and reduce two kinds, wherein, when bandwidth increases, at first carry out respectively HO TS by each LC and adjust, namely finish the LCR operation, and after carrying out the end to end connectivity detection, increase the ODUflex bit rate, namely finish the BWR operation; When bandwidth reduces, at first carry out end to end connectivity and detect, then reduce the ODUflex bit rate, finish the BWR operation, again each LC is carried out respectively HO TS and adjust, finish the LCR operation.
In realizing process of the present invention, the inventor finds that there is following problem at least in prior art: prior art is only under the fault-free scene, realization is to the harmless adjustment of ODUflex bandwidth chahnel, but in the process that the ODUflex bandwidth is adjusted, occur in the situation of link failure, prior art can be interrupted unusually, thereby the inconsistent phenomenon of each section bandwidth status in the ODUflex path occurs.Phenomenon one: exist part LC to finish the TS adjustment and do not finish TS adjustment coexistence phenomenon with part LC, cause and the front allocated bandwidth inconsistent state of adjustment; Phenomenon two: switch if fault triggers trail protection, the ODUflex route diversion is introduced new LC, causes and the front allocated bandwidth inconsistent state of adjustment.
Summary of the invention
For normal process and the rollback problem that solves HAO agreement under the link failure condition, the invention provides the troubleshooting solution of the feasible ODUflex of a kind of stalwartness.When breaking down in the process for the harmless bandwidth adjustment of ODUflex, the adjustment of ODUflex bandwidth is forced to abort, thereby the bandwidth that each section link in the ODUflex path occurs is with the inconsistent phenomenon of state before adjusting or after adjusting.After occuring in fault; the bandwidth of each section link in the ODUflex path is still kept and adjust before or adjust after state consistency; need to increase the adaptation processing after the harmless bandwidth adjustment of ODUflex occurs for fault, comprise the situation after adaptively switching for the fault trigger protection.Described technical scheme is as follows:
The embodiment of the invention provides a kind of fault handling method of optical channel bandwidth, and described method comprises:
Judge whether the link that breaks down in the optical channel data ODUflex path finishes the adjustment of high-order time slot;
Judged result is described link when finishing the high-order time slot and adjusting, and the bandwidth that triggers each link in the described ODUflex path is adjusted to the described link state of lower described each link after adjusting that do not break down, and described flex represents any bit rate.
The embodiment of the invention also provides a kind of fault treating apparatus of optical channel bandwidth, and described device comprises:
Judge module is used for judging whether the link that breaks down in optical channel data ODUflex path finishes the adjustment of high-order time slot;
The first processing module, when being used for judged result when described judge module and being described link and finishing the adjustment of high-order time slot, the bandwidth that triggers each link in the described ODUflex path is adjusted to the state after the lower adjustment of not breaking down, and described flex represents any bit rate.
The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is: during link occurs fault in the ODUflex path, by the bandwidth of each link in the ODUflex path is adjusted, state consistency in the ODUflex path after the maintenance of the bandwidth of each link and the lower adjustment of not breaking down, realized the harmless troubleshooting of adjusting of ODUflex, the present invention has expanded the harmless adaptation processing ability of adjusting for fault of ODUflex, when having eliminated link occurs fault in the ODUflex path bandwidth of each section link with break down before the inconsistent phenomenon of state, when guaranteeing that fault occurs, ODUflex still can normally adjust end, strong adaptability.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the OTN frame that provides in the prior art;
Fig. 2 is the schematic diagram that the ODUflex that provides in the prior art takies 3 time slots of HO OPU2;
Fig. 3 is the symmetric bandwidth ODUflex access diagram of the point-to-point that provides in the prior art;
Fig. 4 a is the adjustment expense schematic diagram in the OPUflex expense in the prior art;
Fig. 4 b is the adjustment expense schematic diagram in the HO OPUk expense in the prior art;
Fig. 5 is the harmless adjustment fault handling method flow chart of the optical channel bandwidth that provides in the embodiment of the invention 1;
Fig. 6 is the harmless adjustment fault handling method flow chart of the optical channel bandwidth that provides in the embodiment of the invention 2;
Fig. 7 is the flow chart that fault normal termination that the ODUflex bandwidth that provides in the embodiment of the invention 2 is adjusted is processed;
Fig. 8 is another flow chart that fault normal termination that the ODUflex bandwidth that provides in the embodiment of the invention 2 is adjusted is processed;
Fig. 9 is the flow chart that failure exception rollback that the ODUflex bandwidth that provides in the embodiment of the invention 2 is adjusted is processed;
Figure 10 is another flow chart that failure exception rollback that the ODUflex bandwidth that provides in the embodiment of the invention 2 is adjusted is processed;
Figure 11 is the HAO AIS pattern schematic diagram that provides in the embodiment of the invention 2;
Figure 12 is the HAO BDI pattern schematic diagram that provides in the embodiment of the invention 2;
Figure 13 is LC bi-directional failure schematic diagram in the ODUflex path that provides in the embodiment of the invention 3;
Figure 14 is that the bi-directional failure LC that provides in the embodiment of the invention 3 finishes the troubleshooting schematic diagram that HO TS adjusts;
Figure 15 is that the bi-directional failure LC that provides in the embodiment of the invention 3 does not finish the troubleshooting schematic diagram that HO TS adjusts;
Figure 16 is LC unidirectional fault schematic diagram in the ODUflex path that provides in the embodiment of the invention 4;
Figure 17 is that the unidirectional fault LC that provides in the embodiment of the invention 4 finishes the troubleshooting schematic diagram that HO TS adjusts;
Figure 18 is that the unidirectional fault LC that provides in the embodiment of the invention 4 does not finish the troubleshooting schematic diagram that HO TS adjusts;
Figure 19 is the structural representation of the nondestructiving regulator of the optical channel bandwidth that provides in the embodiment of the invention 5.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
Prior art is to carry out the harmless bandwidth adjustment of ODUflex under the fault-free scene, when link failure occurs, generally can make the HAO protocol processes be forced to interrupt, appearance part LC finishes the TS adjustment and does not finish TS adjustment coexistence phenomenon with part LC, cause in the ODUflex path each section bandwidth status inconsistent, with adjust before the allocated bandwidth inconsistent state (reason is that the TS of prior art each section HO OPUk in finishing the ODUflex path is when adjusting, independently to be carried out separately by LCR by each HO OPUk section, process respectively, therefore at link failure constantly, can exist part LC to finish the TS adjustment and not finish TS adjustment coexistence phenomenon with part LC).Therefore need the HAO mechanism can adaptive troubleshooting, when this kind situation occurred, it can continue normal process or rollback (the namely recovering) consistent state before adjust.
In addition; during link occurs fault; may switch by trigger protection; but because the protection mechanism of taking in different networks is different; new LC (adjust later or not and adjust) may be introduced in the ODUflex path; cause with adjust before the allocated bandwidth inconsistent state (to be prior art carrying out the harmless bandwidth of ODUflex when adjusting to reason; with ODUflex path strong correlation; every section HO OPUk in the ODUflex path needs to participate in carrying out the TS adjustment of HO OPUk; if trigger protection is switched; then may introduce new LC in the ODUflex path; the new LC that introduces may be for adjusting later or unadjusted bandwidth, each section bandwidth occurs in the ODUflex path with the inconsistent phenomenon of state before adjusting or after adjusting).Therefore can't avoid HAO can continue normal operation, because it adjusts each the node strong correlation with process.
In order to accomplish after fault occurs, each section bandwidth status is still kept and adjust before state or adjust after state consistency, need the HAO mechanism can adaptive troubleshooting, comprise that protection switches triggering.When fault occurred, it can continue normal process until adjustment finishes or unusual rollback (recovery) arrives the front consistent state of adjustment, has therefore proposed the solution of the present invention.
In the embodiment of the invention, when link failure occurs ODUflex, generally can make the HAO protocol processes be forced to interrupt, part of links occur in the ODUflex path and finish the adjustment of high-order time slot, part of links is not finished the phenomenon of high-order time slot adjustment coexistence.When carrying out troubleshooting based on the LC that breaks down, comprise two aspects, the LC that breaks down has on the one hand finished HO TS and has adjusted, the adjustment normal termination so that the adjustment of ODUflex bandwidth can continue to process during troubleshooting; The LC that breaks down does not on the other hand finish HO TS and adjusts, during troubleshooting so that the unusual rollback or return to and adjust front consistent state of ODUflex bandwidth adjustment.
In the practical application, when link failure occurs, can produce the fault instruction by webmaster plane or control plane, whether the fault instruction can be finished the adjustment of high-order time slot based on the link that judgement is broken down and produce different instruction, as, when the LC that breaks down finishes HO TS adjustment, produce the normal termination processing instruction; When the LC that breaks down does not finish HO TS adjustment, produce unusual rollback processing instruction; Also can produce different instruction by specific program, when for example fault occurs, can unify to produce unusual rollback processing instruction etc.
Referring to Fig. 5, the embodiment of the invention provides a kind of fault handling method of optical channel bandwidth, and described method comprises:
Step 101: judge whether the link that breaks down in the optical channel data ODUflex path finishes the adjustment of high-order time slot;
Step 102: judged result is link when finishing the high-order time slot and adjusting, and the bandwidth that triggers each link in the ODUflex path is adjusted to do not break down down state after each link adjustment of this fault, and flex represents any bit rate.
The method that the embodiment of the invention provides, during link occurs fault in the ODUflex path, by the bandwidth of each link in the ODUflex path is adjusted, state consistency in the ODUflex path after the maintenance of the bandwidth of each link and the lower adjustment of not breaking down, realized the harmless troubleshooting of adjusting of ODUflex, the present invention has expanded the harmless adaptation processing ability of adjusting for fault of ODUflex, when having eliminated link occurs fault in the ODUflex path bandwidth of each section link with break down before the inconsistent phenomenon of state, when guaranteeing that fault occurs, ODUflex still can normally adjust end, strong adaptability.
Referring to Fig. 6, the embodiment of the invention provides a kind of fault handling method of optical channel bandwidth, and described method specifically comprises:
Step 201: judge whether the link that breaks down in the ODUflex path finishes the adjustment of high-order time slot;
Particularly, the ODUflex path is when can't harm the bandwidth adjustment, and each link in the ODUflex path carries out respectively the adjustment of high-order time slot.During link occurs fault, the link that breaks down in the ODUflex path may be finished the adjustment of high-order time slot, also may not finish the adjustment of high-order time slot, and whether the embodiment of the invention is finished the adjustment of high-order time slot according to the link that breaks down and taked different adjustment strategies.
In the practical application, during link occurs fault in the ODUflex path, webmaster plane or control plane produce the troubleshooting instruction, and whether this troubleshooting instruction can be finished the adjustment of high-order time slot based on the link that breaks down and produce different instruction.When the link that breaks down is finished the adjustment of high-order time slot, produce the normal termination processing instruction; When the link that breaks down is not finished the adjustment of high-order time slot, produce unusual rollback processing instruction.Webmaster plane or control plane also can produce different troubleshooting instructions by specific program, when for example fault occurs, can unify to produce unusual rollback processing instruction etc.
Wherein, the bandwidth adjustment of each link comprises the bandwidth adjustment of each link in the ODUflex path in the ODUflex path, and is responsible for source node in the ODUflex path and adjusts to the ODUflex bit rate of destination node.
Step 202: judged result is the link that breaks down when finishing the high-order time slot and adjusting, and the bandwidth that triggers each link in the ODUflex path is adjusted to the state after the lower adjustment of not breaking down, and flex represents any bit rate;
Particularly, if the fault instruction is the normal termination processing instruction, triggers the fault normal termination that the bandwidth of each link in the ODUflex path adjusts and process, make the state consistency after ODUflex bandwidth and the lower adjustment of not breaking down.
Wherein, when finishing HO TS and adjust for LC in the embodiment of the invention, the fault normal termination of ODUflex bandwidth adjustment is processed and is comprised two kinds of processing modes:
Referring to Fig. 7, when the LC that breaks down in the ODUflex path finishes HO TS adjustment, the mode one that the fault normal termination that the ODUflex bandwidth is adjusted is processed:
111, break down reported by network elements fault message that link links to each other in the ODUflex path to network management system, this fault message comprises that this faulty link finished high-order time slot adjustment information;
112, after network management system receives this fault message, issue by force switching command according to this fault message to each network element in the ODUflex path;
In this scheme, because the link of ODUflex path fails has been finished the adjustment of high-order time slot, only need to not adjust to default target bandwidth and get final product finishing network element that the adjustment of high-order time slot links to each other in the ODUflex path this moment.Should default target bandwidth be that the link that breaks down carries out the bandwidth after the high-order time slot is adjusted.
113, after each network element of ODUflex path receives by force switching command, the link of not finishing the adjustment of high-order time slot that links to each other is carried out the high-order time slot switch by force, the link of not finishing the adjustment of high-order time slot is adjusted to default target bandwidth;
Wherein, the network element that links to each other with the LC that does not finish HO TS adjustment in the ODUflex path carries out handover operation.After this step was finished, the bandwidth of all links was all adjusted to default target bandwidth in the ODUflex path, has finished the adjustment of bandwidth, and carried out in the ODUflex path source node to the ODUflex bit rate adjustment of destination node.
114, after source node receives by force switching command, the bit rate in ODUflex path is switched to default targeted rate, finish the troubleshooting in ODUflex path;
115, in the ODUflex path each network element switch complete after, report the by force complete indication of hand-off process to network management system.
Referring to Fig. 8, when the LC that breaks down in the ODUflex path finishes HO TS adjustment, the mode two that the fault normal termination that the ODUflex bandwidth is adjusted is processed:
The agreement loop back processing being is adjusted in the triggering of the link that 121, breaks down in the ODUflex path, namely obtains the bandwidth adjustment protocol information that up link is extracted, and this bandwidth adjustment protocol information is sent to down link;
122, down link is adjusted agreement continuation processing based on HAO, until bandwidth is adjusted complete end.
Wherein, HAO adjusts and comprises in the agreement that link is adjusted agreement and bandwidth is adjusted agreement, and down link adjusts agreement based on link and bandwidth adjustment agreement continues to process, until bandwidth is adjusted complete end.
Step 203: judged result is the link that breaks down when not finishing the high-order time slot and adjusting, and the bandwidth that triggers each link in the ODUflex path return back to this link each link that do not break down down and adjusts front state.
Particularly, if the fault instruction is unusual back-off instruction, the bandwidth that triggers each link in the ODUflex path return back to the state before the lower adjustment of not breaking down.
Wherein, the failure exception rollback processing for the adjustment of ODUflex bandwidth comprises dual mode in the embodiment of the invention:
Referring to Fig. 9, when the LC that breaks down in the ODUflex path does not finish HO TS adjustment, the mode one that the failure exception rollback that the ODUflex bandwidth is adjusted is processed:
211, break down the reported by network elements fault message of link in the ODUflex path to network management system, this fault message comprises that the link that breaks down do not finish high-order time slot adjustment information;
212, each network element of receiving in the backward ODUflex of this fault message path of network management system issues the adjustment back-off instruction;
Wherein, the fault adjustment of ODUflex bandwidth adjustment comprises the bandwidth adjustment of each link in the ODUflex path, and is responsible for source node in the ODUflex path and adjusts to the ODUflex bit rate of destination node.
In this scheme, because the link that breaks down is not finished the adjustment of high-order time slot in the ODUflex path, only need to return back to original bandwidth and get final product finishing network element that the adjustment of high-order time slot links to each other in the ODUflex path this moment.This original bandwidth refers to that the link that breaks down does not carry out the bandwidth before the high-order time slot is adjusted.
213, after each network element in the ODUflex path receives and adjusts back-off instruction, the link of finishing the adjustment of high-order time slot that links to each other is carried out the high-order time slot switch by force, will finish the link switching of high-order time slot adjustment to original bandwidth;
Wherein, the network element that links to each other with the LC that finishes HO TS adjustment in the ODUflex path carries out handover operation.After this step was finished, the bandwidth of all links was all adjusted to the original bandwidth before the high-order time slot is adjusted in the ODUflex path, has finished the adjustment of bandwidth.
214, as the network element of source node receive adjust back-off instruction after, the ODUflex bit rate is switched to original speed, finish the troubleshooting of ODUflex;
Wherein, step 214 is carried out in the ODUflex path source node to the ODUflex bit rate adjustment of destination node, is that bandwidth operates when reducing at HO TS only, and bandwidth does not need this operation when increasing.Because when bandwidth increases, the HO TS that carries out first each LC adjusts, after carry out the adjustment of ODUflex bit rate.At this moment, adjust because LC finishes HO TS, also be that the ODUflex bit rate does not begin adjustment, so only carry out the LC rollback and process, only need that each LC is returned to the front state of adjustment and get final product.
When bandwidth reduced, after each LC rollback was finished dealing with, source node was initiated flow and is adjusted inverse operation, flow is returned to adjust front flow rate.
215, after each network element adjustment rollback in the ODUflex path is disposed, report the adjustment rollback to be disposed indication to network management system.
Referring to Figure 10, when the LC that breaks down in the ODUflex path does not finish HO TS adjustment, the mode two that the failure exception rollback that the ODUflex bandwidth is adjusted is processed:
221, the network element that the link that breaks down in the ODUflex path links to each other sends the first index signal to the source node direction;
Wherein, this first index signal can be alarm indication signal HAO AIS;
222, source node is after receiving the first index signal, to opposite end destination node loopback the second index signal;
Wherein, this second index signal can be backward defective indication HAO BDI, and this HAO AIS and HAO BDI are used to indicate the LC that breaks down and do not finish HO TS adjustment;
223, end node triggers the bandwidth of each link in the ODUflex path and adjusts the rollback processing after receiving the first index signal or the second index signal.
Wherein, the bandwidth adjustment rollback processing of each link comprises that specifically each link that triggers the ODUflex path is adjusted agreement according to link and bandwidth adjustment agreement is processed in the triggering ODUflex path, makes the state of each link in the ODUflex path and the front state consistency of lower adjustment that do not break down.
Particularly, for HAO AIS/HAO BDI indication, the embodiment of the invention can adopt but be not limited to following mode:
Inherit NCS transfer mode in the BWR agreement of HAO, HAO AIS and HAO BDI are placed 15 row 1,2,3 row of ODUflex frame equally, such as Figure 11 and shown in Figure 12.HAO AIS and HAO BDI pattern are that Binary Zero 1 interleaves, and keep original CRC3 verification, for HAO AIS pattern, front 3 bits of 15 row, 1 row are 101, front 3 bits of 15 row, 2 row are that front 3 bits of 010,15 row, 3 row are CRC3, and other positions of 15 row keep; For HAO BDI image, front 3 bits of 15 row, 1 row are that front 3 bits of 010,15 row, 2 row are that front 3 bits of 101,15 row, 3 row are CRC3, and other positions of 15 row keep.
HAO AIS in the technical solution of the present invention and HAO BDI are not limited to and place the ODUflex expense, can also be placed among the TSOH of HO OPUk.
Process for the LC rollback, refer to the TS that HO TS adjustment occurs is carried out handover operation, it is switched to the front state of adjusting, can be called against handover operation this moment.The rollback processing of ODUflex bandwidth adjustment can be adopted but be not limited to following mode.
Increase the LC that adjusts for finishing HO TS, carry out TS and reduce the contrary handover operation of adjusting; Reduce the LC that adjusts for finishing HO TS, carry out TS and increase the contrary handover operation of adjusting, the embodiment of the invention can adopt HAO to adjust the LCR agreement and finish the mode that HO TS adjusts contrary handover operation, and is specific as follows:
A, based on CTRL, TPID, TSGS signaling indication, CTRL={ADD wherein, REMOVE, NORM, IDLE}, expression increases instruction, delete instruction, switching command, free time; TPID represents number information; TSGS={ACK, NACK} agrees to reply instruction, disagrees with and replys instruction.
B, in the corresponding RCOH of TS to be increased or TS to be deleted, carry the adjustment signaling;
C, next multiframe boundaries place finishes the contrary of TS and switches after NORM indication, return to adjust before state.
LC rollback in the technical solution of the present invention is processed except the foregoing description mode, can also realize by switching by force.Network management system receives the fault message of the reported by network elements of the LC break down, all issues by force switching command according to fault message all network elements in the ODUflex path, makes described network element adjust to original bandwidth.When for example original bandwidth was 3 TS, network management system directly switched to 3 TS from 5 current TS after receiving the fault message of reported by network elements of the LC that breaks down, and did not switch and adjust by carrying out HO TS after the LCR protocol negotiation again.
For fault message, the embodiment of the invention has proposed the type of fault message and the coded system of fault message, fault message coding as shown in table 1:
Table 1 fault message coding
The type of fault message comprises that two ends adjust that protocol information does not mate, LC does not shake hands, LC shakes hands and finish that LC does not adjust, LC does not adjust, LC adjust finish, ODUflex speed is not adjusted, ODUflex speed adjust in and ODUflex speed adjusted, described fault message comprises one or more in the type that breaks down.
The embodiment of the invention is also encoded to fault message, and whether HO TS adjusts encodes respectively to the LC that breaks down, the coded system of fault message can be by multiple, the present invention does not do restriction at this, is depicted as example with table 1 and describes, and whether the highest order of fault message coding represents whether to finish HO TS is adjusted complete, highest order is 0 in the table 1, it is complete to show that HO TS adjusts, and highest order is 1, and it is complete to show that HO TS does not adjust.
In the embodiment of the invention; take Figure 13 as example; suppose that bi-directional failure occurs LC; (B＜-〉 the C segment fault); whether finish HO TS based on the LC that breaks down (B＜-〉 C section) and adjust, employing mode one carries out that fault normal termination that the ODUflex bandwidth adjusts is processed or unusual rollback is processed.
Network management system issues by force switching command after receiving the fault message that the LC that breaks down reports, as when receiving " 000000001 ", " 000010000 ", " 000100000 ", " 001000000 ", " 010000000 ", trigger by force switching command, the LC that does not then finish HO TS adjustment will carry out HO TS and switch by force, adjust to default target bandwidth; Source node receive adjust by force switching command after, the ODUflex bit rate is switched to default targeted rate.
When receiving " 100000001 ", " 100000010 ", " 100000100 ", " 100001000 ", " 100100000 ", " 101000000 ", " 110000000 " such as network management system, trigger the fault back-off instruction, after each network element receives and adjusts back-off instruction, the adjacent LC that finishes HO TS adjustment is carried out by force contrary switching of HO TS, adjust to original bandwidth; Source node switches to original speed with the ODUflex bit rate after receiving the adjustment back-off instruction.
Fault type in the embodiment of the invention is not limited to kind described above, and the fault message coding form also is not limited to mode described above.
The method that the embodiment of the invention provides; during by the link occurs fault in the ODUflex path; adjust by the bandwidth that triggers each link in the ODUflex path; state consistency after maintenance and the lower adjustment of not breaking down; realized the harmless troubleshooting of adjusting of ODUflex; the present invention has expanded the harmless adaptation processing ability of adjusting for fault of ODUflex; when having eliminated fault in the ODUflex path bandwidth of each section link with adjust before or adjust after the inconsistent phenomenon of state; ODUflex still can normally adjust end or return to the front state of adjusting when guaranteeing fault; and the situation after can adaptive fault trigger protection switching, strong adaptability.
In the practical application, various faults can occur in the optical channel bandwidth, in general are divided into bi-directional failure situation and unidirectional fault situation, and the below illustrates the solution of the present invention with optical channel bandwidth generation bi-directional failure situation.
In the present embodiment, suppose that bi-directional failure (B＜-〉 C segment fault) occurs LC, the troubleshooting of adjusting referring to ODUflex bandwidth shown in Figure 13.
If the LC that breaks down (B＜-〉 the C section) finish HO TS adjustment, as shown in figure 14, employing mode two is processed as follows:
1, the network element that the LC that breaks down in the ODUflex path links to each other, namely B end and C end are adjusted respectively the agreement loopback, and the BWR adjustment protocol information that up link is extracted returns and is inserted into down link; This moment original ODUflex path (A＜-〉 B＜-〉 C＜-〉 D) be divided into about two sections adjust the agreement bang paths, also be A-＞B-＞A and D-＞C-＞D; As shown in figure 14, dotted line is and adjusts the agreement bang path among the figure;
2, new ODUflex path is namely adjusted agreement bang path A-＞B-＞A and D-＞C-＞D and is continued respectively to adjust protocol processes, until adjust normal termination, adjusts thereby finish ODUflex.
If the LC that breaks down (B＜-＞the C section) do not finish HO TS adjustment, as shown in figure 15, employing mode two is processed as follows:
The network element at the LC two ends of 1, breaking down in the ODUflex path produces HAO AIS to source node A and D respectively;
2, source node A (D) is after receiving HAO AIS, to opposite end destination node D (A) loopback HAO BDI;
3, end node A (D) triggers the ODUflex bandwidth and adjusts the rollback processing after receiving HAO AIS;
3.1, initiate RP=0, each node finishes to adjust in the indication ODUflex path, each LC carries out rollback to be processed, namely return back to adjust before state;
3.2, in the bandwidth increase situation, only carry out the LC rollback and process;
Wherein, because in bandwidth increase situation, the HO TS that carries out first each LC adjusts, after carry out the adjustment of ODUflex bit rate, and this moment, fault LC did not finish HO TS adjustment, was that the ODUflex bit rate does not begin adjustment yet, only needed that therefore each LC is returned to the front state of adjustment and got final product.
3.3, in the bandwidth minimizing situation, after each LC rollback was finished dealing with, source was initiated flow and is adjusted inverse operation, with flow return to adjust before flow rate.
The below illustrates the solution of the present invention with optical channel bandwidth generation unidirectional fault situation.
At present embodiment, suppose that unidirectional fault (C-＞B segment fault) occurs the LC that breaks down in the ODUflex path, referring to the troubleshooting of ODUflex bandwidth adjustment shown in Figure 16.
If the LC that breaks down (C-＞B section) finishes HO TS and adjusts, as shown in figure 16, employing mode two is processed as follows:
1, the B of the LC that breaks down in ODUflex path end is adjusted the agreement loopback, and the BWR that up link is extracted adjusts protocol information and returns and be inserted into down link;
Wherein, (normal process of A-＞B-＞A) until adjust finishes fault left side loopback; ODUflex adjusts the agreement bang path as shown in phantom in Figure 17.
2, the adjustment protocol information of up link still keeps A-＞D to transmit (loopback is not triggered on the fault right side), the adjustment agreement change information that egress D transmits by source A, and fault right side part can be finished equally to adjust and process until finish.
Wherein, because this adjusts the HAO agreement as the bi-directional symmetrical bandwidth, it is symmetrical that the up-downgoing that is in course of adjustment keeps, the protocol information transmission has symmetry, so egress D can finish the adjustment processing of fault right side part until finish equally by receiving the normal agreement change information of adjusting in fault left side.
If the LC that breaks down in the ODUflex path (C-＞B section) does not finish HO TS and adjusts, as shown in figure 18, employing mode two is processed as follows:
1, break down in the ODUflex path B end of LC produces HAO AIS to source node A;
2, source node A is after receiving HAO AIS, to opposite end destination node D loopback HAO BDI;
3, source node A triggers the ODUflex bandwidth and adjusts the rollback processing after receiving HAO AIS;
3.1, initiate RP=0, each node finishes to adjust in the indication ODUflex path, each LC carries out rollback to be processed, namely return back to adjust before state;
3.2, in the bandwidth increase situation, only carry out the LC rollback and process;
Wherein, because in the bandwidth increase situation, the HO TS that carries out first each LC adjusts, after carry out the adjustment of ODUflex bit rate, and this moment, fault LC did not finish HO TS adjustment, was that the ODUflex bit rate does not begin adjustment yet, only needed that therefore each LC is returned to the front state of adjustment and got final product.
3.3, in the bandwidth minimizing situation, after each LC rollback was finished dealing with, source was initiated flow and is adjusted inverse operation, with flow return to adjust before flow rate.
4, destination node D is detecting HAO BDI, and perception D is to A direction link failure and do not finish HO TS adjustment, triggers the ODUflex bandwidth and adjusts the rollback processing; Process operation with step 3.
Referring to Figure 19, the fault treating apparatus of a kind of optical channel bandwidth that the embodiment of the invention provides, described device comprise judge module 301 and the first processing module 302;
The first processing module 302, when being used for judged result when judge module 301 and being link and finishing the high-order time slot and adjust, the bandwidth of each link is adjusted to the state after the lower adjustment of not breaking down in the triggering ODUflex path, and flex represents any bit rate.
Wherein, described device also comprises the second processing module 303, when being used for judged result when judge module 301 and being link and not finishing the high-order time slot and adjust, the bandwidth that triggers each link in the ODUflex path return back to the link front state of each link adjustment that do not break down down.
Particularly, the first processing module 302 specifically comprises and reports unit and switch unit,
Report the unit, be used for reporting fault information to network management system, make network management system all issue by force switching command according to fault message to all network elements in the ODUflex path, fault message comprises that the link that sends fault finishes the information that the high-order time slot is adjusted, and this reports the unit is the network element that link that the high-order time slot adjusts links to each other of finishing in the ODUflex path;
Switch unit, all network elements that are used for making the ODUflex path are according to switching command by force, the bandwidth of the link of not finishing the adjustment of high-order time slot in the ODUflex path is switched by force, adjusted to the target bandwidth, and the bit rate in ODUflex path is switched to targeted rate.
Wherein, the first processing module 302 specifically comprises transmitting element and adjustment unit,
Transmitting element, the bandwidth that is used for that up link is extracted is adjusted protocol information and is sent to down link, is adjusted the agreement bang path, and this transmitting element is the descending network element that the link that breaks down in the ODUflex path links to each other;
Adjustment unit is used for making each link of adjusting the agreement bang path to carry out bandwidth and adjusts protocol processes, the bandwidth of each link and the state consistency after the lower adjustment of not breaking down in the adjustment agreement bang path.
Wherein, the second processing module 303 specifically comprises and reports unit and adjustment unit,
Report the unit, be used for reporting fault information to network management system, make network management system all issue command information according to fault message to all network elements in the ODUflex path, this reports the unit is not finish the continuous network element of link that the high-order time slot is adjusted in the ODUflex path;
Adjustment unit, be used for making all network elements in ODUflex path according to command information, the bandwidth of the link of finishing the adjustment of high-order time slot in the ODUflex path is switched by force, adjusted to original bandwidth, and the bit rate in ODUflex path is return back to original speed.
Wherein, the second processing module 303 specifically comprises transmitting element, the first adjustment unit and the second adjustment unit,
Transmitting element is used for making the continuous descending network element of the link that breaks down in ODUflex path to send the first index signal to the source node in the ODUflex path;
The first adjustment unit, after being used for source node and receiving the first index signal, send the second index signal to the opposite end destination node, and process according to link adjustment agreement and bandwidth adjustment agreement, make the state and the front state consistency of lower adjustment that do not break down of each link in the ODUflex path;
The second adjustment unit after being used for the opposite end destination node and receiving the second index signal, is adjusted agreement and bandwidth according to link and is adjusted agreement and process, the state consistency before the state that makes each link in the ODUflex path and the lower adjustment of not breaking down.
The device that the embodiment of the invention provides; during by the link occurs fault in the ODUflex path; adjust by the bandwidth that triggers each link in the ODUflex path; state consistency after maintenance and the lower adjustment of not breaking down; realized the harmless troubleshooting of adjusting of ODUflex; the present invention has expanded the harmless adaptation processing ability of adjusting for fault of ODUflex; when having eliminated fault in the ODUflex path each section bandwidth with adjust before or adjust after the state consistency phenomenon; ODUflex still can normally adjust end or return to the front state of adjusting when guaranteeing fault; and the situation after can adaptive fault trigger protection switching, strong adaptability.
The Apparatus and system that present embodiment provides specifically can belong to same design with embodiment of the method, and its specific implementation process sees embodiment of the method for details, repeats no more here.
The all or part of step that one of ordinary skill in the art will appreciate that realization above-described embodiment can be finished by hardware, also can come the relevant hardware of instruction to finish by program, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. the fault handling method of an optical channel bandwidth is characterized in that, described method comprises:
Judge whether the link that breaks down in the optical channel data ODUflex path finishes the adjustment of high-order time slot;
Judged result is described link when finishing the high-order time slot and adjusting, and the bandwidth that triggers each link in the described ODUflex path is adjusted to the described link state of lower described each link after adjusting that do not break down, and described flex represents any bit rate.
2. the method for claim 1 is characterized in that, the bandwidth of each link is adjusted to the state after the lower adjustment of not breaking down in the described ODUflex of the described triggering path, specifically comprises:
The reported by network elements fault message that the link of finishing the adjustment of high-order time slot in the described ODUflex path links to each other is to network management system, make described network management system all issue by force switching command according to described fault message to all network elements in the described ODUflex path, described fault message comprises that the described link that breaks down finishes the information that the high-order time slot is adjusted;
All network elements in the described ODUflex path are according to described by force switching command, the bandwidth of each link of not finishing the adjustment of high-order time slot that all network elements in the ODUflex path are continuous is switched by force, adjust to the target bandwidth, and the bit rate in ODUflex path is switched to targeted rate.
3. method as claimed in claim 1 or 2 is characterized in that, the bandwidth of each link is adjusted to the state after the lower adjustment of not breaking down in the described ODUflex of the described triggering path, specifically comprises:
The bandwidth that the descending network element that the link that breaks down in the described ODUflex path links to each other extracts up link is adjusted protocol information and is sent to down link, is adjusted the agreement bang path;
Each link in the described adjustment agreement bang path is adjusted agreement and bandwidth according to link and is adjusted agreement and process, the state consistency after the state that makes each link in the described adjustment agreement bang path and the lower adjustment of not breaking down.
4. such as the described method of each claim of claim 1-3, it is characterized in that described method also comprises:
Judged result is described link when not finishing the high-order time slot and adjusting, and the bandwidth that triggers each link in the described ODUflex path return back to the described link state of lower described each link before adjusting that do not break down.
5. method as claimed in claim 4 is characterized in that, the bandwidth of each link return back to the front state of lower adjustment that do not break down in the described ODUflex of the described triggering path, specifically comprises:
Do not finish the continuous network element of link that the high-order time slot is adjusted in the described ODUflex path, reporting fault information is to network management system, make described network management system all issue command information according to described fault message to all network elements in the described ODUflex path, described fault message comprises that described link do not finish the information that the high-order time slot is adjusted;
All network elements in the described ODUflex path switch the bandwidth of each link in the described ODUflex path by force according to described command information, adjust to original bandwidth, and the bit rate in described ODUflex path is return back to original speed.
6. such as claim 4 or 5 described methods, it is characterized in that the bandwidth of each link return back to the front state of lower adjustment that do not break down in the described ODUflex of the described triggering path, specifically comprises:
The descending network element that the link that breaks down in the described ODUflex path links to each other sends the first index signal to the source node in the described ODUflex path;
After described source node receives described the first index signal, send the second index signal to the opposite end destination node, and adjust agreement and bandwidth according to link and adjust agreement and process, the state consistency before the state that makes each link in the described ODUflex path and the lower adjustment of not breaking down;
After described opposite end destination node receives described the second index signal, process according to link adjustment agreement and bandwidth adjustment agreement, make the state and the front state consistency of lower adjustment that do not break down of each link in the described ODUflex path.
7. such as claim 2 or 5 described methods, it is characterized in that, the fault message of described reported by network elements comprises: two ends adjust fault message, link handshake that the unmatched fault message of protocol information, link do not shake hands in finishing fault message, ODUflex speed that the unadjusted fault message of link, the unadjusted fault message of link, link adjustment finish adjustment information, ODUflex speed being adjusted fault message and one or more fault messages in the adjusted fault message of ODUflex speed, the corresponding malfunction coding information of each fault message.
8. the fault treating apparatus of an optical channel bandwidth is characterized in that, described device comprises:
Judge module is used for judging whether the link that breaks down in optical channel data ODUflex path finishes the adjustment of high-order time slot;
The first processing module, when being used for judged result when described judge module and being described link and finishing the adjustment of high-order time slot, the bandwidth that triggers each link in the described ODUflex path is adjusted to the state after the lower adjustment of not breaking down, and described flex represents any bit rate.
9. device as claimed in claim 8 is characterized in that, described the first processing module specifically comprises:
Report the unit, be used for reporting fault information to network management system, make described network management system all issue by force switching command according to described fault message to all network elements in the described ODUflex path, described fault message comprises that the described link that breaks down finishes the information that the high-order time slot is adjusted, and the described unit that reports is the network element that link that the high-order time slot adjusts links to each other of finishing in the described ODUflex path;
Switch unit, be used for making all network elements in described ODUflex path according to described by force switching command, the bandwidth of the link of not finishing the adjustment of high-order time slot in the ODUflex path is switched by force, adjusted to the target bandwidth, and the bit rate in ODUflex path is switched to targeted rate.
10. install as claimed in claim 8 or 9, it is characterized in that described the first processing module specifically comprises:
Transmitting element, the bandwidth that is used for that up link is extracted is adjusted protocol information and is sent to down link, is adjusted the agreement bang path, and described transmitting element is the descending network element that the link that breaks down in the ODUflex path links to each other;
Adjustment unit is used for making each link of described adjustment agreement bang path to carry out bandwidth adjustment protocol processes, the state consistency in the described adjustment agreement bang path after the bandwidth of each link and the lower adjustment of not breaking down.
11. device as claimed in claim 8, it is characterized in that, described device also comprises the second processing module, when being used for judged result when described judge module and being described link and not finishing the high-order time slot and adjust, the bandwidth that triggers each link in the described ODUflex path return back to described link lower described each link that do not break down and adjusts front state.
12. device as claimed in claim 11 is characterized in that, described the second processing module specifically comprises:
Report the unit, be used for reporting fault information to network management system, make described network management system all issue command information according to described fault message to all network elements in the described ODUflex path, the described unit that reports is not finish the continuous network element of link that the high-order time slot is adjusted in the ODUflex path;
Adjustment unit, be used for making all network elements in described ODUflex path according to described command information, the bandwidth of the link of finishing the adjustment of high-order time slot in the described ODUflex path is switched by force, adjust to original bandwidth, and the bit rate in described ODUflex path is return back to original speed.
13., it is characterized in that described the second processing module specifically comprises such as claim 11 or 12 described devices:
Transmitting element is used for making the continuous descending network element of the link that breaks down in described ODUflex path to send the first index signal to the source node in the described ODUflex path;
The first adjustment unit, after being used for described source node and receiving described the first index signal, send the second index signal to the opposite end destination node, and adjust agreement and bandwidth according to link and adjust agreement and process, the state consistency before the state that makes each link in the described ODUflex path and the lower adjustment of not breaking down;
The second adjustment unit after being used for described opposite end destination node and receiving described the second index signal, is adjusted agreement and bandwidth according to link and is adjusted agreement and process, the state consistency before the state that makes each link in the described ODUflex path and the lower adjustment of not breaking down.
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