CN102984605B - 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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- CN102984605B CN102984605B CN201110264084.6A CN201110264084A CN102984605B CN 102984605 B CN102984605 B CN 102984605B CN 201110264084 A CN201110264084 A CN 201110264084A CN 102984605 B CN102984605 B CN 102984605B
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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, comprise the technical specification of electric 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, flexible dispatching and the management of Large Copacity business can be realized, day by day become the mainstream technology of Backbone Transport Network.At electric treatment layer, powerful " digital wrapper " structure of OTN technology definition, can realize the management and supervision to client signal.
OTN frame structure refers to Fig. 1, OTN frame is the modular construction of 4080 × 4, 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.Wherein FAS (Frame Alignment Signal, frame alignment byte), provides the function that frame synchronization is located.OTUk OH is Optical Channel Transport Unit-k overhead byte, provides the Network Management Function of Optical Channel Transport Unit-k rank.ODUk OH is Optical Channel Data Unit-k overhead byte, provides maintenance and operation function.OPUk OH is optical channel Payload Unit overhead byte, provides the function of client signal adaptation.OPUk is optical channel Payload Unit, provides the function that client signal carries.FEC is forward error correction byte, provides error detector and error correction.Coefficient k represents supported bit rate and different types of OPUk, ODUk and OTUk.K=1 represents that bit rate is that 2.5Gbit/s, k=2 represent that bit rate is that 10Gbit/s, k=3 represent that bit rate is that 40Gbit/s, k=4 represent that bit rate is that 100Gbit/s, k=flex represent that its bit rate is arbitrary size.
ODUflex keeps original ODUk frame structure, can carry CBR (Constant bit rate, fixed bit rate) business and the bag business of arbitrary velocity.For bag business, by GFP-F (Frame-Mapped Generic framing Procedure, Generic Framing Procedure based on frame maps) encapsulate, be mapped to OPUflex payload section afterwards, then ODUflex is passed through GMP (Generic framing Procedure, Generic Framing Procedure) be 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), eventually through HO OTUk (Higher Order Optical Channel Transport Unit-k, high-order optical channel transmission unit k) carry out carrying transmission, wherein 2≤k≤4, M represents ODUflex and occupies M time slot in HO OPUk.ODUflex speed is chosen as M*TS speed, wherein 1≤M≤80, and TS (Time Slot, time slot) speed is the slot rate of HO OPUk.
ODUflex speed has diversity, and therefore ODUflex can carry the bag business of arbitrary velocity.When carrying the bag business of different rates, ODUflex speed chooses corresponding speed grade (corresponding take several time slots of HO OPUk), as shown in Figure 2, HO OPU2 comprises eight 1.25G time slots, ODUflex takies 3 time slots, i.e. TS1, TS2 and the TS4 of HO OPU2.
Because bag service traffics have the characteristic of non real-time change, therefore the demand of bag business to the bandwidth of service layer's container is transformable.Operator wishes can according to customer service grade and customer data flow needs, dynamically adjust service layer's bandwidth chahnel, not only improve the service quality of operator, and can make full use of its resource and provide differentiated service to more client.Therefore, in different time sections, ODUflex needs to provide different bandwidth to meet the different flow of bag business, and needs to carry out the adjustment of ODUflex bandwidth chahnel in the continuous situation of bag business.This that is to say the G.hao agreement (ODUflex can't harm Bandwidth adjustment) that current I TU-T is formulating.
HAO (Hitless Adjustment of ODUflex, the harmless adjustment of ODUflex) protocol solutions is by LCR (Link Connection Resize, link adjusts) and BWR (Bandwidth Resize, Bandwidth adjustment) complete the harmless Bandwidth adjustment of ODUflex, wherein LCR is responsible for the time slot adjustment of each section of HO OPUk in ODUflex path, and BWR is responsible for ODUflex bit rate adjustment end to end.
Point-to-point symmetric bandwidth ODUflex access diagram as shown in Figure 3, ODUflex path is from source node to destination node, centre have passed through two intermediate nodes, namely be made up of 3 Link sections and 2 Matrix sections, wherein Link section: in the HO ODU passage of carrying ODUflex, LC (Link Connection, link) section between two network nodes be connected arbitrarily; Matrix section: in the HO ODU passage of carrying ODUflex, cross matrix linkage section in arbitrary network node; Link section and Matrix section are the LC described in literary composition.
From source node to destination node direction, in source node, by GFP-F, bag business is mapped into ODUflex, by GMP, ODUflex is mapped into HO ODTU2.2 (as in Fig. 3 afterwards, make it take TS1, TS4 of HO ODU2, be only herein and illustrate, do not limit).At first intermediate node, by GMP, ODUflex is gone out from HO ODU2 demapping, cross intersection afterwards, again ODUflex is mapped to HO ODTU3.2 (as in Fig. 3 at cross matrix opposite side by GMP, order which occupies TS5, TS12 of HO ODU3, be only herein and illustrate, do not limit).At second intermediate node, by GMP, ODUflex is gone out from HO ODU3 demapping, cross intersection afterwards, again ODUflex is mapped to HO ODTU2.2 (as in Fig. 3 at cross matrix opposite side by GMP, it is made to take TS4, TS5 of HO ODU2, be only herein and illustrate, do not limit).In destination node, by GMP, ODUflex is gone out from HO ODU2 demapping, by GFP-F, bag business is parsed from ODUflex afterwards.In like manner, from destination node to source node direction, transmit bag business according to same bandwidth distribution and path.
The HAO agreement of prior art can accomplish that ODUflex can't harm Bandwidth adjustment, is completed the harmless Bandwidth adjustment of ODUflex by LCR and BWR.Such as, to realize, harmless Bandwidth adjustment is carried out to the ODUflex path in Fig. 3, adopt the HAO agreement of prior art, wherein LCR is responsible for the Bandwidth adjustment of each Link section and Matrix section in ODUflex path, completes the TS adjustment of the HO OPUk that ODUflex takies; BWR is responsible for source node and adjusts to the ODUflex bit rate of destination node, first carries out detection of connectivity, carries out the adjustment of ODUflex bit rate afterwards.
LCR and BWR completes ODUflex by the adjustment agreement defined and can't harm Bandwidth adjustment, 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, branch road detection of connectivity), NCS (Network Connection Status, network answer state), BWD_IND (Bandwidth Resize Indicator, Bandwidth adjustment indicates), RP (Protocol indicator, protocol-identifier) field.Wherein RP, TSCC, CTRL, TPID, TSGS are placed in the TSOH of HO OPUk, and be positioned at 15 row 1,2,3 row, BWD_IND, NCS are placed in OPUflex expense, and as shown in figures 4 a and 4b, Fig. 4 a represents the adjustment expense schematic diagram being placed in OPUflex expense; Fig. 4 b represents the adjustment expense schematic diagram being placed in HO OPUk expense.
Wherein, CTRL takies 2bits, be used for transmitting control signal, 00 represents IDLE signaling (i.e. idle signaling), 01 represents ADD signaling (namely increasing signaling), 10 represent REMOVE signaling (i.e. mobile signaling protocol), and 11 represent NORM signaling (i.e. hand off signaling); TPID takies 7bits, represents tributary port ID, is used for representing which group is current TS belong to; TSGS takies 1bit, and 1 represents OK state, and 0 represents NOT-OK state, is produced by egress, is used for confirming 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, and the response for detection of connectivity indicates, and is produced by destination node, based on the different TSSC values received, produces and replys instruction accordingly; BWD_IND takies 2bit, is used to indicate ODUflex bit rate and starts adjustment and terminate; RP takies 1bit, and what be used to indicate transmission is adjustment protocol overhead; CRC5 and CRC3 is cyclic redundancy check (CRC) code; RES is for retaining position.
When prior art carries out the harmless adjustment of bandwidth chahnel under fault-free scene, bandwidth increase and bandwidth is divided into reduce two kinds, wherein, when bandwidth increases, first carry out HO TS adjustment respectively by each LC, namely complete LCR operation, and after carrying out end to end connectivity detection, increase ODUflex bit rate, namely complete BWR operation; When bandwidth reduces, first carry out end to end connectivity detection, then reduce ODUflex bit rate, complete BWR operation, then HO TS adjustment is carried out respectively to each LC, complete LCR operation.
Realizing in process of the present invention, inventor finds that prior art at least exists following problem: prior art is only under fault-free scene, realize the harmless adjustment to ODUflex bandwidth chahnel, but when there is link failure in the process of ODUflex Bandwidth adjustment, prior art can be interrupted extremely, thus occurs each section of inconsistent phenomenon of bandwidth status in ODUflex path.Phenomenon one: there is part LC and complete TS adjustment and do not complete TS and adjust with part LC the phenomenon that coexists, cause and the front allocated bandwidth inconsistent state of adjustment; Phenomenon two: if fault actuate path pretection switch, ODUflex route diversion, introduces new LC, causes the front allocated bandwidth inconsistent state with adjustment.
Prior art under fault-free scene, carries out ODUflex can't harm Bandwidth adjustment, when there is link failure, HAO protocol processes generally can be made to be forced to interrupt, occur that part LC completes TS adjustment and do not complete TS and adjust with part LC the phenomenon that coexists, cause each section of bandwidth status in ODUflex path inconsistent, (reason is that prior art is when the TS completing each section of HO OPUk in ODUflex path adjusts with allocated bandwidth inconsistent state before adjustment, independently carried out separately by LCR by each HO OPUk section, process respectively, therefore in the link failure moment, part LC can be there is complete TS adjustment and do not complete TS and adjust with part LC the phenomenon that coexists).Therefore need HAO mechanism can adaptive troubleshooting, when this kind of situation occurs, it can continue the consistent state before normal process or rollback (namely recovering) to adjustment.
In addition, during link occurs fault, may switch by trigger protection, but because the protection mechanism taked in different networks is different, new LC (after adjustment or do not adjust) may be introduced in ODUflex path, (reason is that prior art is when carrying out ODUflex and can't harm Bandwidth adjustment to cause the front allocated bandwidth inconsistent state with adjustment, with ODUflex path strong correlation, every section of HO OPUk in ODUflex path needs the TS adjustment participating in carrying out HO OPUk, if trigger protection is switched, then may introduce new LC in ODUflex path, the LC of new introducing may be after adjustment or unadjusted bandwidth, in appearance ODUflex path, each length of tape is wide with adjusting the front or rear inconsistent phenomenon of state of adjustment).Therefore HAO cannot be avoided can to continue normal work, because its adjustment is with each node strong correlation of process.
In order to accomplish after fault occurs, each section of bandwidth status can be made in ODUflex path still to keep and state or state consistency after adjust before adjustment, need HAO mechanism can adaptive troubleshooting, comprise pretection switch triggering.When fault occurs, it can continue normal process until adjustment terminates or abnormal rollback (recovery) arrives the consistent state before adjusting, and therefore proposes the solution of the present invention.
Summary of the invention
In order to solve normal process and the rollback problem of HAO agreement under link failure condition, the invention provides the troubleshooting solution of the feasible ODUflex of a kind of stalwartness.Can't harm when breaking down in the process of Bandwidth adjustment for ODUflex, ODUflex Bandwidth adjustment is forced to abort, thus occurs that the bandwidth of each section of link in ODUflex path is with the inconsistent phenomenon of state before adjustment or after adjustment.In order to after fault occurs; the bandwidth of each section of link in ODUflex path can be made still to keep front with adjustment or adjust rear state consistency; need to increase ODUflex and can't harm Bandwidth adjustment for the adaptation processing after fault generation, comprise the situation after can adaptive switching for fault trigger protection.Described technical scheme is as follows:
Embodiments provide a kind of fault handling method of optical channel bandwidth, described method comprises:
Judge whether the link broken down in optical channel data ODUflex path completes the adjustment of high-order time slot;
Judged result is described link when completing the adjustment of high-order time slot, the Bandwidth adjustment triggering each link in described ODUflex path to described link do not break down lower described each link adjust after state, described flex represents any bit rate.
The embodiment of the present invention additionally provides a kind of fault treating apparatus of optical channel bandwidth, and described device comprises:
Judge module, for judging whether the link broken down in optical channel data ODUflex path completes the adjustment of high-order time slot;
First processing module, for when the judged result of described judge module be described link complete high-order time slot adjustment time, trigger the state of Bandwidth adjustment after lower adjustment of not breaking down of each link in described ODUflex path, described flex represents any bit rate.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is: during link occurs fault in ODUflex path, by adjusting the bandwidth of link each in ODUflex path, in ODUflex path, the bandwidth of each link keeps and the state consistency after lower adjustment that do not break down, achieve the troubleshooting that ODUflex can't harm adjustment, the present invention has expanded ODUflex and can't harm the adaptation processing ability of adjustment for fault, when eliminating link occurs fault in ODUflex path each section of link bandwidth with break down before the inconsistent phenomenon of state, when ensureing that fault occurs, ODUflex still normally can adjust end, strong adaptability.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the OTN frame provided in prior art;
Fig. 2 is the schematic diagram that the ODUflex provided in prior art takies 3 time slots of HO OPU2;
Fig. 3 is the symmetric bandwidth ODUflex access diagram of the point-to-point provided in prior art;
Fig. 4 a is the adjustment expense schematic diagram in prior art in OPUflex expense;
Fig. 4 b is the adjustment expense schematic diagram in prior art in HO OPUk expense;
Fig. 5 is the harmless adjustment fault handling method flow chart of the optical channel bandwidth provided in the embodiment of the present invention 1;
Fig. 6 is the harmless adjustment fault handling method flow chart of the optical channel bandwidth provided in the embodiment of the present invention 2;
Fig. 7 is the flow chart of the fault normal termination process of the ODUflex Bandwidth adjustment provided in the embodiment of the present invention 2;
Fig. 8 is another flow chart of the fault normal termination process of the ODUflex Bandwidth adjustment provided in the embodiment of the present invention 2;
Fig. 9 is the flow chart of the failure exception rollback process of the ODUflex Bandwidth adjustment provided in the embodiment of the present invention 2;
Figure 10 is another flow chart of the failure exception rollback process of the ODUflex Bandwidth adjustment provided in the embodiment of the present invention 2;
Figure 11 is the HAO AIS pattern schematic diagram provided in the embodiment of the present invention 2;
Figure 12 is the HAO BDI pattern schematic diagram provided in the embodiment of the present invention 2;
Figure 13 is LC bi-directional failure schematic diagram in the ODUflex path provided in the embodiment of the present invention 3;
Figure 14 is the troubleshooting schematic diagram that the bi-directional failure LC provided in the embodiment of the present invention 3 completes HO TS adjustment;
Figure 15 is the troubleshooting schematic diagram that the bi-directional failure LC provided in the embodiment of the present invention 3 does not complete HO TS adjustment;
Figure 16 is LC unidirectional fault schematic diagram in the ODUflex path provided in the embodiment of the present invention 4;
Figure 17 is the troubleshooting schematic diagram that the unidirectional fault LC provided in the embodiment of the present invention 4 completes HO TS adjustment;
Figure 18 is the troubleshooting schematic diagram that the unidirectional fault LC provided in the embodiment of the present invention 4 does not complete HO TS adjustment;
Figure 19 is the structural representation of the nondestructiving regulator of the optical channel bandwidth provided in the embodiment of the present invention 5.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment 1
In the embodiment of the present invention, when link failure occurs ODUflex, HAO protocol processes generally can be made to be forced to interrupt, occur that in ODUflex path, part of links completes the adjustment of high-order time slot, part of links does not complete the phenomenon that the adjustment of high-order time slot coexists.When carrying out troubleshooting based on the LC broken down, comprise two aspects, the LC broken down on the one hand has completed HO TS and has adjusted, and makes ODUflex Bandwidth adjustment can continue process until adjustment normal termination during troubleshooting; The LC broken down on the other hand does not complete HO TS and adjusts, make during troubleshooting ODUflex Bandwidth adjustment can abnormal rollback or return to adjust before consistent state.
In practical application, when there is link failure, faulting instruction can be produced by webmaster plane or control plane, faulting instruction can based on judging whether the link broken down completes the adjustment of high-order time slot and produce different instruction, as, when the LC broken down completes HO TS adjustment, produce normal termination processing instruction; When the LC broken down does not complete HO TS adjustment, produce abnormal rollback processing instruction; Also can produce different instruction by specific program, such as, when fault occurs, can unify to produce abnormal rollback processing instruction etc.
See Fig. 5, embodiments provide a kind of fault handling method of optical channel bandwidth, described method comprises:
Step 101: judge whether the link broken down in optical channel data ODUflex path completes the adjustment of high-order time slot;
Step 102: judged result is link when completing the adjustment of high-order time slot, the Bandwidth adjustment triggering each link in ODUflex path to this fault do not break down lower each link adjust after state, flex represents any bit rate.
The method that the embodiment of the present invention provides, during link occurs fault in ODUflex path, by adjusting the bandwidth of link each in ODUflex path, in ODUflex path, the bandwidth of each link keeps and the state consistency after lower adjustment that do not break down, achieve the troubleshooting that ODUflex can't harm adjustment, the present invention has expanded ODUflex and can't harm the adaptation processing ability of adjustment for fault, when eliminating link occurs fault in ODUflex path each section of link bandwidth with break down before the inconsistent phenomenon of state, when ensureing that fault occurs, ODUflex still normally can adjust end, strong adaptability.
Embodiment 2
See Fig. 6, embodiments provide a kind of fault handling method of optical channel bandwidth, described method specifically comprises:
Step 201: judge whether the link broken down in ODUflex path completes the adjustment of high-order time slot;
Particularly, ODUflex path is when carrying out harmless Bandwidth adjustment, and each link in ODUflex path carries out the adjustment of high-order time slot respectively.During link occurs fault, the link broken down in ODUflex path may complete the adjustment of high-order time slot, also may not complete the adjustment of high-order time slot, and whether the embodiment of the present invention completes the adjustment of high-order time slot according to the link broken down and take different adjustable strategies.
In practical application, during link occurs fault in ODUflex path, webmaster plane or control plane produce troubleshooting instruction, and whether this troubleshooting instruction can complete the adjustment of high-order time slot based on the link broken down and produce different instruction.When the link broken down completes the adjustment of high-order time slot, produce normal termination processing instruction; When the link broken down does not complete the adjustment of high-order time slot, produce abnormal rollback processing instruction.Webmaster plane or control plane also can produce different troubleshooting instructions by specific program, such as, when fault occurs, can unify to produce abnormal rollback processing instruction etc.
Wherein, in ODUflex path, the Bandwidth adjustment of each link comprises the Bandwidth adjustment of each link in ODUflex path, and in ODUflex path, responsible source node adjusts to the ODUflex bit rate of destination node.
Step 202: judged result is the link broken down when completing the adjustment of high-order time slot, and trigger the state of Bandwidth adjustment after lower adjustment of not breaking down of each link in ODUflex path, flex represents any bit rate;
Particularly, if faulting instruction is normal termination processing instruction, trigger the fault normal termination process of the Bandwidth adjustment of each link in ODUflex path, make the state consistency after ODUflex bandwidth and lower adjustment of not breaking down.
Wherein, when completing HO TS adjustment for LC in the embodiment of the present invention, the fault normal termination process of ODUflex Bandwidth adjustment comprises two kinds of processing modes:
When completing HO TS adjustment see the LC broken down in Fig. 7, ODUflex path, the mode one of the fault normal termination process of ODUflex Bandwidth adjustment:
111, the reported by network elements fault message that the link that breaks down in ODUflex path is connected is to network management system, and this fault message comprises this faulty link and completed high-order time slot adjustment information;
112, after network management system receives this fault message, switching command is by force issued according to this fault message to each network element in ODUflex path;
In the program, the link due to ODUflex path fails has completed the adjustment of high-order time slot, now only needs the network element not completing the adjustment of high-order time slot in ODUflex path connected to adjust to default target bandwidth.This target bandwidth preset is the bandwidth after the link broken down carries out the adjustment of high-order time slot.
113, each network element in ODUflex path receives by force after switching command, carries out high-order time slot and switches by force, the link not completing the adjustment of high-order time slot is adjusted to default target bandwidth to the link not completing the adjustment of high-order time slot be connected;
Wherein, in ODUflex path with do not complete the network element that LC that HO TS adjusts is connected and carry out handover operation.After this step completes, in ODUflex path, the bandwidth of all links all adjusts to default target bandwidth, completes the adjustment of bandwidth, and carries out source node in ODUflex path and adjust to the ODUflex bit rate of destination node.
114, source node receives by force after switching command, the bit rate in ODUflex path is switched to default targeted rate, completes the troubleshooting in ODUflex path;
115, after each network element switches in ODUflex path, report that hand-off process is by force complete is indicated to network management system.
When completing HO TS adjustment see the LC broken down in Fig. 8, ODUflex path, the mode two of the fault normal termination process of ODUflex Bandwidth adjustment:
The triggering adjustment agreement loop back processing being of the link 121, broken down in 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 adjusts agreement continuation process, until the complete end of Bandwidth adjustment based on HAO.
Wherein, HAO adjusts agreement and comprises link adjustment agreement and Bandwidth adjustment agreement, and down link continues process, until the complete end of Bandwidth adjustment based on link adjustment agreement and Bandwidth adjustment agreement.
Step 203: judged result is the link broken down when not completing the adjustment of high-order time slot, triggers the bandwidth of each link in ODUflex path and return back to this link and not break down the state before lower each link adjustment.
Particularly, if faulting instruction is abnormal back-off instruction, trigger the bandwidth of each link in ODUflex path return back to lower adjustment of not breaking down before state.
Wherein, the failure exception rollback process for ODUflex Bandwidth adjustment in the embodiment of the present invention comprises two kinds of modes:
When not completing HO TS adjustment see the LC broken down in Fig. 9, ODUflex path, the mode one of the failure exception rollback process of ODUflex Bandwidth adjustment:
211, break down the reported by network elements fault message of link in ODUflex path to network management system, this fault message comprises the link broken down and does not complete high-order time slot adjustment information;
212, adjustment back-off instruction is issued to each network element in ODUflex path after network management system receives this fault message;
Wherein, the fault adjustment of ODUflex Bandwidth adjustment comprises the Bandwidth adjustment of each link in ODUflex path, and in ODUflex path, responsible source node adjusts to the ODUflex bit rate of destination node.
In the program, because the link broken down in ODUflex path does not complete the adjustment of high-order time slot, now only need the network element completing the adjustment of high-order time slot in ODUflex path connected to return back to original bandwidth.This original bandwidth refer to the link broken down do not carry out the adjustment of high-order time slot before bandwidth.
213, after each network element in ODUflex path receives adjustment back-off instruction, high-order time slot is carried out to the link completing the adjustment of high-order time slot be connected and switches by force, will complete the link switching of high-order time slot adjustment to original bandwidth;
Wherein, in ODUflex path with complete the network element that LC that HO TS adjusts is connected and carry out handover operation.After this step completes, in ODUflex path the bandwidth of all links all adjust to high-order time slot adjustment before original bandwidth, complete the adjustment of bandwidth.
214, as source node network element receive adjustment back-off instruction after, ODUflex bit rate is switched to original speed, completes the troubleshooting of ODUflex;
Wherein, step 214 is carried out source node in ODUflex path and is adjusted to the ODUflex bit rate of destination node, only HO TS be bandwidth reduce time operate, do not need this operation when bandwidth increases.Because bandwidth increase time, the HO TS first carrying out each LC adjusts, after carry out the adjustment of ODUflex bit rate.Now, adjust because LC does not complete HO TS, namely ODUflex bit rate does not start adjustment yet, therefore only carries out the process of LC rollback, only each LC need be returned to the front state of adjustment.
When bandwidth reduces, after the process of each LC rollback completes, source node initiates flow adjustment inverse operation, flow is returned to the front flow rate of adjustment.
215, after each network element adjustment rollback in ODUflex path is disposed, reports adjustment rollback to be disposed and be indicated to network management system.
When not completing HO TS adjustment see the LC broken down in Figure 10, ODUflex path, the mode two of the failure exception rollback process of ODUflex Bandwidth adjustment:
221, the network element that the link broken down in ODUflex path is connected sends the first index signal to 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 second index signal;
Wherein, this second index signal can be that backward defect instruction HAO BDI, this HAO AIS and HAO BDI are used to indicate the LC that breaks down and do not complete HO TS and adjust;
223, end node is after receiving the first index signal or the second index signal, triggers the Bandwidth adjustment rollback process of each link in ODUflex path.
Wherein, trigger the Bandwidth adjustment rollback process of each link in ODUflex path specifically to comprise each link triggering ODUflex path and process according to link adjustment agreement and Bandwidth adjustment agreement, make the state consistency before the state of each link in ODUflex path and lower adjustment of not breaking down.
Particularly, indicate for HAO AIS/HAO BDI, the embodiment of the present invention can adopt but be not limited to as under type:
Inherit NCS transfer mode in the BWR agreement of HAO, HAO AIS and HAO BDI is placed in equally 15 row 1,2,3 row of ODUflex frame, as is illustrated by figs. 11 and 12.HAO AIS and HAO BDI pattern are that Binary Zero 1 interleaves, and retain original CRC3 and verify, for HAO AIS pattern, front 3 bits of 15 row 1 row are 101, front 3 bits of 15 row 2 row are front 3 bits of 010,15 row 3 row is CRC3, and other positions of 15 row retain; For HAO BDI image, front 3 bits of front 3 bits of 15 row 1 row to be front 3 bits of 010,15 row 2 row be 101,15 row 3 row are CRC3, and other positions of 15 row retain.
HAO AIS in technical solution of the present invention and HAO BDI is not limited to and is placed in ODUflex expense, can also be placed in the TSOH of HO OPUk.
For the process of LC rollback, referring to that the TS to there is HO TS adjustment performs handover operation, switching to the state before adjustment, now can be called inverse handover operation.The rollback process of ODUflex Bandwidth adjustment can adopt but be not limited to as under type.
Increasing the LC of adjustment for completing HO TS, carrying out the inverse handover operation that TS reduces adjustment; For the LC completing HO TS minimizing adjustment, carry out the inverse handover operation that TS increases adjustment, the embodiment of the present invention can adopt HAO adjustment LCR agreement to complete the mode of the inverse handover operation of HO TS adjustment, specific as follows:
A, based on CTRL, TPID, TSGS signaling instruction, wherein CTRL={ADD, REMOVE, NORM, IDLE}, represent increase instruction, delete instruction, switching command, the free time; TPID represents number information; TSGS={ACK, NACK}, agree to reply instruction, do not agree to reply instruction.
B, carry adjustment signaling waiting to increase in the corresponding RCOH of TS or TS to be deleted;
C, the inverse switching completing TS at NORM instruction next multiframe boundaries place rear, return to state before adjusting.
LC rollback process in technical solution of the present invention, can also by switching realization by force except foregoing description mode.Network management system receives the fault message of the reported by network elements of the LC broken down, and all issues switching command by force according to fault message to all network elements in ODUflex path, makes described network element adjust to original bandwidth.Such as, when original bandwidth is 3 TS, after network management system receives the fault message of the reported by network elements of the LC broken down, be directly switched to 3 TS from current 5 TS, and do not switch adjustment by carrying out HO TS after LCR protocol negotiation again.
For fault message, the embodiment of the present invention proposes the type of fault message and the coded system of fault message, fault message coding as shown in table 1:
Table 1 fault message is encoded
The type of fault message comprise two ends adjustment protocol information do not mate, LC does not shake hands, LC shakes hands terminate that LC does not adjust, LC does not adjust, LC adjustment terminates, ODUflex speed does not adjust, in the adjustment of ODUflex speed and ODUflex speed adjusted, described fault message comprise in the type broken down one or more.
The embodiment of the present invention is also encoded to fault message, and to the LC broken down, whether HO TS adjustment is encoded respectively, the coded system of fault message can by multiple, the present invention does not limit at this, is depicted as example is described with table 1, and the highest order of fault message coding represents whether whether complete HO TS adjusts complete, in table 1, highest order is 0, show that HO TS adjusts complete, highest order is 1, shows that HO TS does not adjust complete.
In the embodiment of the present invention; for Figure 13; suppose that bi-directional failure occurs LC; (B<->C segment fault); whether complete HO TS based on the LC broken down (B<->C section) to adjust, employing mode one carries out the fault normal termination process of ODUflex Bandwidth adjustment or abnormal rollback process.
Network management system issues switching command by force after receiving the fault message that the LC that breaks down reports, during as received " 000000001 ", " 000010000 ", " 000100000 ", " 001000000 ", " 010000000 ", trigger switching command by force, the LC then not completing HO TS adjustment will carry out HO TS and switch by force, adjust to default target bandwidth; Source node adjusts by force after switching command receiving, and ODUflex bit rate is switched to default targeted rate.
As network management system receive " 100000001 ", " 100000010 ", " 100000100 ", " 100001000 ", " 100100000 ", " 101000000 ", " 110000000 " time, trigger fault back-off instruction, after each network element receives adjustment back-off instruction, the adjacent LC completing HO TS adjustment is carried out HO TS inverse switching by force, adjust to original bandwidth; ODUflex bit rate, after receiving adjustment back-off instruction, is switched to original speed by source node.
Fault type in the embodiment of the present invention is not limited to kind described above, and fault message coding form is also not limited to mode described above.
The method that the embodiment of the present invention provides, during by link occurs fault in ODUflex path, adjusted by the bandwidth triggering each link in ODUflex path, keep and the state consistency after lower adjustment that do not break down, achieve the troubleshooting that ODUflex can't harm adjustment, the present invention has expanded ODUflex and can't harm the adaptation processing ability of adjustment for fault, when eliminating fault in ODUflex path each section of link bandwidth and adjustment before or adjust the inconsistent phenomenon of state afterwards, during guarantee fault, ODUflex still normally can adjust and terminate or return to the front state of adjustment, and can adaptive fault trigger protection switch after situation, strong adaptability.
Embodiment 3
In practical application, can there is various fault in optical channel bandwidth, is in general divided into bi-directional failure situation and unidirectional fault situation, with optical channel bandwidth generation bi-directional failure situation, the solution of the present invention is described below.
In the present embodiment, suppose that bi-directional failure (B<->C segment fault) occurs LC, the troubleshooting of ODUflex Bandwidth adjustment shown in Figure 13.
If the LC broken down (B<->C section) completes HO TS and adjusts, as shown in figure 14, employing mode two processes as follows:
1, the network element that the LC broken down in ODUflex path is connected, namely B end and C end, carry out adjustment agreement loopback respectively, and BWR adjustment protocol information up link extracted returns and is inserted into down link; Now original ODUflex path (A<->B<-GreatT.Gr eaT.GTC<->D) is divided into two sections, left and right adjustment agreement bang path, is also A-> B-> A and D-> C-> D; As shown in figure 14, in figure, dotted line is adjustment agreement bang path;
2, new ODUflex path, namely adjust agreement bang path A-> B-> A and D-> C-> D to continue respectively to adjust protocol processes, until adjustment normal termination, thus complete ODUflex adjustment.
If the LC broken down (B<-> C section) does not complete HO TS and adjusts, as shown in figure 15, employing mode two processes as follows:
The network element at the LC two ends of 1, breaking down in ODUflex path, produces HAO AIS respectively to source node A and D;
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) is after receiving HAO AIS, triggers the process of ODUflex Bandwidth adjustment rollback;
3.1, initiate RP=0, in instruction ODUflex path, each node terminates adjustment, and each LC carries out rollback process, namely return back to the front state of adjustment;
3.2, in bandwidth increase situation, the process of LC rollback is only carried out;
Wherein, due in bandwidth increase situation, the HO TS first carrying out each LC adjusts, after carry out the adjustment of ODUflex bit rate, and now fault LC does not complete HO TS and adjusts, namely ODUflex bit rate does not start adjustment yet, therefore only each LC need be returned to state before adjustment.
3.3, in bandwidth minimizing situation, after the process of each LC rollback completes, source initiates flow adjustment inverse operation, flow is returned to the front flow rate of adjustment.
Embodiment 4
With optical channel bandwidth generation unidirectional fault situation, the solution of the present invention is described below.
At the present embodiment, suppose that the LC broken down in ODUflex path unidirectional fault (C-> B segment fault) occurs, the troubleshooting of ODUflex Bandwidth adjustment shown in Figure 16.
If the LC broken down (C-> B section) completes HO TS and adjusts, as shown in figure 16, employing mode two processes as follows:
The B end of the LC 1, broken down in ODUflex path carries out adjustment agreement loopback, and BWR adjustment protocol information up link extracted returns and is inserted into down link;
Wherein, on the left of fault loopback (A-> B-> A) normal process until adjustment terminate; ODUflex adjusts agreement bang path as shown in phantom in Figure 17.
2, the adjustment protocol information of up link still keeps A-> D to transmit (not triggering loopback on the right side of fault), the adjustment agreement change information that egress D transmits by source A, fault right part can complete adjustment process equally until terminate.
Wherein, because HAO agreement is originally as bi-directional symmetrical Bandwidth adjustment, the up-downgoing that is in course of adjustment keeps symmetrical, protocol information transmission has symmetry, and therefore egress D can complete the adjustment process of fault right part until terminate equally by receiving normal adjustment agreement change information on the left of fault.
If the LC broken down in ODUflex path (C-> B section) does not complete HO TS and adjusts, as shown in figure 18, employing mode two processes as follows:
1, the B end of LC of breaking down in ODUflex path 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 is after receiving HAO AIS, triggers the process of ODUflex Bandwidth adjustment rollback;
3.1, initiate RP=0, in instruction ODUflex path, each node terminates adjustment, and each LC carries out rollback process, namely return back to the front state of adjustment;
3.2, in bandwidth increase situation, the process of LC rollback is only carried out;
Wherein, due in bandwidth increase situation, the HO TS first carrying out each LC adjusts, after carry out the adjustment of ODUflex bit rate, and now fault LC does not complete HO TS and adjusts, namely ODUflex bit rate does not start adjustment yet, therefore only each LC need be returned to state before adjustment.
3.3, in bandwidth minimizing situation, after the process of each LC rollback completes, source initiates flow adjustment inverse operation, flow is returned to the front flow rate of adjustment.
4, destination node D is detecting HAO BDI, perception D to A direction link failure and do not complete HO TS and adjust, and triggers the process of ODUflex Bandwidth adjustment rollback; Process operation is with step 3.
Embodiment 5
See Figure 19, the fault treating apparatus of a kind of optical channel bandwidth that the embodiment of the present invention provides, described device comprises judge module 301 and the first processing module 302;
Judge module 301, for judging whether the link broken down in optical channel data ODUflex path completes the adjustment of high-order time slot;
First processing module 302, for when the judged result of judge module 301 be link complete the adjustment of high-order time slot time, trigger the state of Bandwidth adjustment after lower adjustment of not breaking down of each link in ODUflex path, flex represents any bit rate.
Wherein, described device also comprises the second processing module 303, for when the judged result of judge module 301 be link do not complete the adjustment of high-order time slot time, trigger the bandwidth of each link in ODUflex path and return back to link and not break down the state before lower each link adjustment.
Particularly, the first processing module 302 specifically comprises and reports unit and switch unit,
Report unit, for reporting fault information to network management system, network management system is made all to issue switching command by force according to fault message to all network elements in ODUflex path, fault message comprises the information that the link sending fault completes the adjustment of high-order time slot, and this reports unit to be the network element that the link completing the adjustment of high-order time slot in ODUflex path is connected;
Switch unit, for making all network elements in ODUflex path according to switching command by force, the bandwidth not completing the link of high-order time slot adjustment in ODUflex path is switched by force, adjusts to 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, is sent to down link for Bandwidth adjustment protocol information up link extracted, is adjusted agreement bang path, and this transmitting element is the descending network element that the link broken down in ODUflex path is connected;
Adjustment unit, for making each link in adjustment agreement bang path carry out Bandwidth adjustment protocol processes, in adjustment agreement bang path each link bandwidth and lower adjustment of not breaking down after state consistency.
Wherein, the second processing module 303 specifically comprises and reports unit and adjustment unit,
Report unit, 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 ODUflex path, this reports unit to be the network element that the link not completing the adjustment of high-order time slot in ODUflex path is connected;
Adjustment unit, for making all network elements in ODUflex path according to command information, the bandwidth completing the link of high-order time slot adjustment in ODUflex path is switched by force, adjusts 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, sends the first index signal for the descending network element making the link broken down in ODUflex path be connected to the source node in ODUflex path;
First adjustment unit, after receiving the first index signal for source node, send the second index signal to opposite end destination node, and process according to link adjustment agreement and Bandwidth adjustment agreement, make the state of each link in ODUflex path and the state consistency before lower adjustment that do not break down;
Second adjustment unit, after receiving the second index signal, processes according to link adjustment agreement and Bandwidth adjustment agreement, make the state of each link in ODUflex path and the state consistency before lower adjustment that do not break down for opposite end destination node.
The device that the embodiment of the present invention provides, during by link occurs fault in ODUflex path, adjusted by the bandwidth triggering each link in ODUflex path, keep and the state consistency after lower adjustment that do not break down, achieve the troubleshooting that ODUflex can't harm adjustment, the present invention has expanded ODUflex and can't harm the adaptation processing ability of adjustment for fault, when eliminating fault in ODUflex path each length of tape wide with adjustment before or adjust state consistency phenomenon afterwards, during guarantee fault, ODUflex still normally can adjust and terminate or return to the front state of adjustment, and can adaptive fault trigger protection switch after situation, strong adaptability.
The Apparatus and system that the present embodiment provides, specifically can belong to same design with embodiment of the method, its specific implementation process refers to embodiment of the method, repeats no more here.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a fault handling method for optical channel bandwidth, is characterized in that, described method comprises:
Judge whether the link broken down in optical channel data ODUflex path completes the adjustment of high-order time slot;
Judged result is described link when completing the adjustment of high-order time slot, the Bandwidth adjustment triggering each link in described ODUflex path to described link do not break down lower described each link adjust after state, described flex represents any bit rate;
Judged result is described link when not completing the adjustment of high-order time slot, and the bandwidth triggering each link in described ODUflex path return back to described link and not break down the state before lower described each link adjustment.
2. the method for claim 1, is characterized in that, the state of Bandwidth adjustment after lower adjustment of not breaking down of each link in described triggering described ODUflex path, specifically comprises:
The reported by network elements fault message that the link completing the adjustment of high-order time slot in described ODUflex path is connected is to network management system, make described network management system all issue switching command by force according to described fault message to all network elements in described ODUflex path, the link broken down described in described fault message comprises completes the information of high-order time slot adjustment;
All network elements in described ODUflex path are according to described switching command by force, the bandwidth not completing each link of high-order time slot adjustment be connected by network elements all in ODUflex path switches by force, adjust to target bandwidth, and the bit rate in ODUflex path is switched to targeted rate.
3. method as claimed in claim 1 or 2, it is characterized in that, the state of Bandwidth adjustment after lower adjustment of not breaking down of each link in described triggering described ODUflex path, specifically comprises:
The Bandwidth adjustment protocol information that up link is extracted by the descending network element that the link broken down in described ODUflex path is connected is sent to down link, is adjusted agreement bang path;
Each link in described adjustment agreement bang path processes according to link adjustment agreement and Bandwidth adjustment agreement, makes the state of each link in described adjustment agreement bang path and the state consistency after lower adjustment that do not break down.
4. the method for claim 1, is characterized in that, in described triggering described ODUflex path, the bandwidth of each link return back to the state before lower adjustment of not breaking down, and specifically comprises:
The network element that the link not completing the adjustment of high-order time slot in described ODUflex path is connected, 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 described ODUflex path, described fault message comprises the information that described link does not complete the adjustment of high-order time slot;
The bandwidth of each link in described ODUflex path, according to described command information, switches, adjusts to original bandwidth by all network elements in described ODUflex path by force, and the bit rate in described ODUflex path is return back to original speed.
5. the method as described in claim 1 or 4, is characterized in that, in described triggering described ODUflex path, the bandwidth of each link return back to the state before lower adjustment of not breaking down, and specifically comprises:
The descending network element that the link broken down in described ODUflex path is connected sends the first index signal to the source node in described ODUflex path;
After described source node receives described first index signal, the second index signal is sent to opposite end destination node, and process according to link adjustment agreement and Bandwidth adjustment agreement, make the state of each link in described ODUflex path and the state consistency before lower adjustment that do not break down;
After described opposite end destination node receives described second index signal, process according to link adjustment agreement and Bandwidth adjustment agreement, make the state of each link in described ODUflex path and the state consistency before lower adjustment that do not break down.
6. the method as described in claim 2 or 4, it is characterized in that, the fault message of described reported by network elements comprises: the fault message in the fault message that fault message, link handshake that two ends adjustment protocol information unmatched fault message, link are not shaken hands terminate the unadjusted fault message of link, the unadjusted fault message of link, link adjustment terminate, the non-adjustment information of ODUflex speed, the adjustment of ODUflex speed and one or more fault messages in the adjusted fault message of ODUflex speed, the corresponding malfunction coding information of each fault message.
7. a fault treating apparatus for optical channel bandwidth, is characterized in that, described device comprises:
Judge module, for judging whether the link broken down in optical channel data ODUflex path completes the adjustment of high-order time slot;
First processing module, for when the judged result of described judge module be described link complete high-order time slot adjustment time, trigger the state of Bandwidth adjustment after lower adjustment of not breaking down of each link in described ODUflex path, described flex represents any bit rate;
Second processing module, for when the judged result of described judge module be described link do not complete the adjustment of high-order time slot time, the bandwidth triggering each link in described ODUflex path return back to described link and not to break down the state before lower described each link adjustment.
8. device as claimed in claim 7, it is characterized in that, described first processing module specifically comprises:
Report unit, for reporting fault information to network management system, described network management system is made all to issue switching command by force according to described fault message to all network elements in described ODUflex path, the link broken down described in described fault message comprises complete high-order time slot adjustment information, described in report unit be in described ODUflex path complete high-order time slot adjustment link be connected network element;
Switch unit, for making all network elements in described ODUflex path according to described switching command by force, the bandwidth not completing the link of high-order time slot adjustment in ODUflex path is switched by force, adjusts to target bandwidth, and the bit rate in ODUflex path is switched to targeted rate.
9. device as claimed in claim 7 or 8, it is characterized in that, described first processing module specifically comprises:
Transmitting element, is sent to down link for Bandwidth adjustment protocol information up link extracted, is adjusted agreement bang path, and described transmitting element is the descending network element that the link broken down in ODUflex path is connected;
Adjustment unit, for making each link in described adjustment agreement bang path carry out Bandwidth adjustment protocol processes, the bandwidth of each link and the state consistency after lower adjustment that do not break down in described adjustment agreement bang path.
10. device as claimed in claim 7, it is characterized in that, described second processing module specifically comprises:
Report unit, 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 described ODUflex path, described in report unit be do not complete in ODUflex path high-order time slot adjustment link be connected network element;
Adjustment unit, for making all network elements in described ODUflex path according to described command information, the bandwidth completing the link of high-order time slot adjustment in 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.
11. devices as described in claim 7 or 10, it is characterized in that, described second processing module specifically comprises:
Transmitting element, the descending network element that the link broken down for making in described ODUflex path is connected sends the first index signal to the source node in described ODUflex path;
First adjustment unit, after receiving described first index signal for described source node, the second index signal is sent to opposite end destination node, and process according to link adjustment agreement and Bandwidth adjustment agreement, make the state of each link in described ODUflex path and the state consistency before lower adjustment that do not break down;
Second adjustment unit, after receiving described second index signal, processes according to link adjustment agreement and Bandwidth adjustment agreement, make the state of each link in described ODUflex path and the state consistency before lower adjustment that do not break down for described opposite end destination node.
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| CN105323089B (en) * | 2014-07-17 | 2018-06-29 | 中国电信股份有限公司 | The method of positioning failure, equipment, controller and system in cross-domain transmission net |
| US9538264B2 (en) | 2014-08-07 | 2017-01-03 | Ciena Corporation | ODUflex resizing systems and methods |
| CN109688679B (en) * | 2017-10-19 | 2020-07-28 | 华为技术有限公司 | Method and device for determining fault reason |
| CN111464889B (en) * | 2020-03-20 | 2022-02-01 | 烽火通信科技股份有限公司 | Channel bandwidth adjusting method and system |
| CN111541959B (en) * | 2020-04-21 | 2022-03-25 | 国网浙江省电力有限公司信息通信分公司 | Bandwidth adjusting method, related device, equipment and computer-readable storage medium |
| CN111865406B (en) * | 2020-06-11 | 2021-12-14 | 烽火通信科技股份有限公司 | Link detection method and system |
| CN113453097B (en) * | 2021-06-23 | 2022-10-14 | 烽火通信科技股份有限公司 | Service recovery method, device, equipment and readable storage medium |
| CN116437373A (en) * | 2021-12-31 | 2023-07-14 | 中国移动通信有限公司研究院 | Channel resource adjustment method and device and communication equipment |
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