CN102006222A - Service link switching method and service link switching device - Google Patents
Service link switching method and service link switching device Download PDFInfo
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- CN102006222A CN102006222A CN2010105473111A CN201010547311A CN102006222A CN 102006222 A CN102006222 A CN 102006222A CN 2010105473111 A CN2010105473111 A CN 2010105473111A CN 201010547311 A CN201010547311 A CN 201010547311A CN 102006222 A CN102006222 A CN 102006222A
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Abstract
The invention discloses a service link switching method and a service link switching device for reducing service transmission interruption time caused by service link failures and increasing service link transmission efficiency and service link transmission quality. The service link switching method comprises the following steps: when detecting the faults of a first service link for carrying the current service of the network device, a detecting module of a network device generates a warning message, wherein the warning message at least comprises a fault type indicating message and a fault link indicating message; when determining the type of the fault to be link failure according to the warning message, a switching decision-making module of the network device generates a service link switching command; and a switching module of the network device is used for switching the current service from a first service link to a second service link according to the service link switching command. The method is capable of effectively reducing the service transmission interruption time caused by the service link failure and increasing the service link transmission efficiency and the service link transmission quality. The invention discloses the service link switching device at the same time.
Description
Technical field
The present invention relates to the communications field, relate in particular to and transmit in the Netcom letter field, when service link breaks down, carry out method and device that service link switches.
Background technology
In the communication technology; when carrying out service protection; usually adopt detection protocol that service transmission link is detected; when detecting service transmission link and break down; triggering is about the warning information of this fault; and this warning information is sent to protection switch status machine module, and after handling, protection switch status machine module obtains new state, and carry out service link according to this new state and switch.
(Transmission-Multiprotocol Label Switching, T-MPLS) network is that example describes the service protection process to transmit multiprotocol label switching below.Consult shown in the accompanying drawing 1, in the T-MPLS network, service link is realized with the form in tunnel, adopts protection tunnel Tp that the business that work tunnel Tw goes up transmission is protected.The detailed process of protection is as follows: at first be work tunnel Tw and protection tunnel Tp configuration detection module, in the TMPLS network, detection module is Operations, Administration and Maintenance (the T-MPLS Operation of T-MPLS network, Administration and Maintenance, T-MPLS OAM), detection module is enabled detection of connectivity (Continuity Check, CC) function to two tunnels by sending and receiving connectivity testing message; Passing node equipments is carried out detection of connectivity to work tunnel Tw right overhead, detect when breaking down, produce a loss of connectivity (Loss of Continuity, LOC) warning information, this LOC warning information is passed to APS (Automatic Protection Switching, APS) state machine; After calculating by the APS state machine, with system mode by do not have request (No Request, NR) be converted to the work tunnel Signal Fail (Signal Fail, SF), and issuing service tunnel switching command is given handover module; At last, handover module carries out service tunnel according to the service tunnel switching command and switches, and the business on the work tunnel Tw of originally running on is changed into run on the protection tunnel Tp.
Yet, in service transport network, generally require service link switching time less than 50ms, service link is long switching time, can cause professional interruptions in transmissions, reduces service transmission quality and user's experience.
Summary of the invention
The invention provides a kind of service link changing method and device, because the business that the service link fault causes is transmitted break period, improve service link switching efficiency and service transmission quality to reduce.
The concrete technical scheme that the embodiment of the invention provides is as follows:
A kind of service link device for switching comprises:
Detection module is used for producing warning information when first service link that the network equipment detects carrying this equipment current business breaks down, and described warning information comprises fault type indication information and faulty link indication information at least;
Switch decision module when being used for the described network equipment and determining that according to described warning information fault type is link failure, produces the service link switching command;
Handover module is used for the described network equipment and according to described service link switching command current business is switched to second service link from described first service link.
A kind of service link changing method comprises:
First service link that the detection module of the network equipment detects carrying this equipment current business produces warning information when breaking down, and described warning information comprises fault type indication information and faulty link indication information at least;
When the switch decision module of the described network equipment determines that according to described warning information fault type is link failure, produce the service link switching command;
The handover module of the described network equipment switches to second service link with current business from described first service link according to described service link switching command.
Based on technique scheme; when the detection module of the network equipment breaks down at first service link that detects current business; generation comprises the warning information of fault type indication information and faulty link indication information; switch decision module produces the service link switching command when determining fault type for link failure according to warning information; and according to this service link switching command current business is switched to second service link from first service link by handover module; thereby effectively avoided warning information is passed to protection switch status machine module; again by protection switch status machine resume module warning information; according to warning information computing service new state and produce the shared time of service link switching command; can effectively reduce the business transmission break period that the service link fault causes; improve service link switching efficiency and service transmission quality, and then promote user experience.
Description of drawings
Fig. 1 is that existing T-MPLS service tunnel switches schematic diagram;
Fig. 2 is a service link switching device shifter structure chart of the present invention;
Fig. 3 is a service link changing method flow chart of the present invention;
Fig. 4 is that T-MPLS service tunnel of the present invention switches schematic diagram.
Embodiment
The time that service link switches constitutes and mainly comprises three parts: a part is that fault takes place to detecting fault and producing the time T 1 of warning information; A part is protection switch status machine resume module warning information and the time T 2 that produces the service link switching command; Another part is to carry out the link switchover order to carry out the spent time T 3 of service link switching.Wherein, T2 has the greatest impact to professional switching time, and reason is as follows: 1. protection switch status machine module is to be realized by software, and it is more obvious that logic operation speed is subjected to system resource to take the influence of situation; 2. protection switch status machine module generally has at least 7 kinds of states, transformational relation complexity between the various states, need a large amount of logical operations, protection switch status machine module is when the computing service new state, need carry out preliminary treatment to warning information, according to warning information and user's configuration order computing service new state, the service condition in the system is switched to this new state again, and produce the service link switching command; 3. in the distributed system; protection switch status machine module operates on the master control borad more; a protection switch status machine module copy is arranged on each business board; business board produces warning information after detecting fault; again warning information is delivered on the master control borad; after the protection switch status machine module computing service new state on the master control borad; producing the service link switching command also is delivered to this service link switching command on the business board; carry out the service link switching command by business board again; and protection switch status machine module on the master control borad and the protection switch status machine module on the business board need regularly be carried out synchronously, have prolonged service link switching time greatly.
By analyzing the various state exchanges of protection switch status machine module; as can be known; it is the main cause that service link interrupts that active link breaks down; and service link breaks down and can trigger warning information; therefore, service link being optimized switching time mainly is that active link fault and then the process that produces warning information are optimized.
In order to optimize the service link handoff procedure, reduce because the business transmission break period that the service link fault causes, improve the service link switching efficiency, a kind of service link changing method is provided in the embodiment of the invention, can effectively reduce the business transmission break period that the service link fault is caused, improve service link switching efficiency and service transmission quality, this method is: first service link that the detection module of the network equipment detects carrying this equipment current business breaks down and produces warning information, warning information comprises fault type indication information and faulty link indication information at least, when the switch decision module of the network equipment determines that according to warning information fault type is link failure, produce the service link switching command, the handover module of the network equipment switches to second service link with current business from first service link according to the service link switching command.
Below in conjunction with accompanying drawing the preferred embodiment of the invention is elaborated.The embodiment of the invention goes for T-MPLS passage layers, T-MPLS channel layer and T-MPLS section layer; also go in the resist technologies such as multimachine frame link aggregation group, multiplex section protection and Tributary Protection Switch; if in the practical application; also exist other application to go for the related method of the embodiment of the invention, in the present invention also is included in it.
Consult shown in the accompanying drawing 2, in the embodiment of the invention, the service link switching device shifter mainly is made up of following processing module:
Switch decision module 202 when being used for the network equipment and determining that according to warning information fault type is link failure, produces the service link switching command;
In distributed system, the network equipment comprises master control borad and business board, and the service link switching device shifter is positioned on the business board, by detection module service link is detected, and produces warning information when detecting fault, and this warning information is sent to switch decision module; When switch decision module determines that according to warning information fault type is link failure, produce the service link switching command, and send to handover module; Handover module carries out service link according to the service link switching command and switches.
In integrated system, comprise master control borad in the network equipment, the service link switching device shifter is positioned on the master control borad, to the capable detection of service link, produces warning information by detection module when detecting fault, and this warning information is sent to switch decision module; When switch decision module determines that according to warning information fault type is link failure, produce the service link switching command, and send to handover module; Handover module carries out service link according to the service link switching command and switches.In another embodiment, detection module produces warning information to the capable detection of service link when detecting fault, this warning information is sent to switch decision module; Switch decision module sends to protection switch status machine module on the master control borad with warning information; when switch decision module determines that according to warning information fault type is link failure; produce the service link switching command; protection switch status machine module on the master control borad is according to warning information computing service new state simultaneously; and according to this new state generation service link switching command; because switch decision module does not need to carry out state computation; therefore produce the service link switching command and send to handover module prior to protection switch status machine module; carry out service link by handover module and switch, the service link switching command that is produced by protection switch status machine module that handover module receives once more then is left in the basket.
Based on the said system framework, to consult shown in the accompanying drawing 3, in the embodiment of the invention, the detailed process of service link changing method is as follows:
Step 301: first service link that the detection module of the network equipment detects carrying this equipment current business produces warning information when breaking down, and this warning information comprises fault type indication information and faulty link indication information at least.
Wherein, before first service link that detects current business,, and, promptly determine one group of active link and protection link at least according to the definite link protection group that transmits of this port information by the required port information of configuration module configuration service link switchover of the network equipment.The embodiment of the invention need be distinguished the required port information of configuration service link switchover on a passing node equipments that constitutes service link and caudal knot point device, and configuration transmits the link protection group.
At least comprise fault type indication information and faulty link indication information in warning information, wherein, the fault type indication information is used to distinguish the type of link failure, for example, and LOC, far-end faulty indication RDI, Client Signal Fail CSF etc.; The faulty link indication information is used for determining faulty link, for example, adopts link number as the faulty link indication information.In addition, in warning information, can also comprise and be used to indicate the whether indication information of fault of link.
Step 302: when the switch decision module of the network equipment determines that according to above-mentioned warning information fault type is link failure, produce the service link switching command.
In the embodiment of the invention; when switch decision module determines that according to warning information fault type is link failure; produce the service link switching command; otherwise; then warning information is sent to the protection switch status machine module of the network equipment by switch decision module; determine fault type and computing service new state by protection switch status machine module according to warning information, produce corresponding order according to the new state that calculates.
Wherein, when switch decision module determines that according to warning information fault type is link failure, produce the service link switching command, be specially: when switch decision module determines that according to warning information fault type is link failure, if when determining that according to warning information first service link that breaks down is the protection link, then directly produce the service link switching command; If when determining that according to warning information first service link that breaks down is active link, from system, obtain the current state of above-mentioned current business, and when the priority of determining this current state is lower than the priority of link failure corresponding service state, produce the service link switching command.
For example, when faulty link is active link, from system, obtain current state of service, be that manual switchover, exercise are switched or when not having request in professional current state, can determine that the priority of professional current state is lower than the priority of service signal failure state, then produces the service link switching command; If at faulty link is active link; from system, obtain current state of service; in professional current state when not allowing to switch; can determine that then the priority of professional current state is higher than the priority of link failure corresponding service state; then can not produce the service link switching command; but warning information is sent to the protection switch status machine module of the network equipment;, carry out the state renewal and produce corresponding order according to warning information computing service new state by protection switch status machine module according to this new state.
Step 303: the handover module of the network equipment switches to second service link with current business from first service link according to the service link switching command.
Wherein, carry out link switchover and comprise two kinds of situations: first service link is an active link, and second service link is the protection link; Perhaps, first service link is the protection link, and second service link is an active link.
Preferably, detection module sends to warning information the protection switch status machine module of the network equipment when warning information is sent to switch decision module; Protection switch status machine module is upgraded the service condition in the system, and is produced corresponding order (being the service link switching command) according to this new state, and this order is sent to handover module according to warning information computing service new state; Handover module at first receives service link switching command that switch decision module sends to carry out after service link switches; if handoff failure then carries out the service link switching once more according to the follow-up service link switching command that is sent by protection switch status machine module that receives.For fear of the secondary link switchover, handover module is before switching to second service link from first service link, judge whether above-mentioned business has run on second service link, if, then ignore this service link switching command, do not switch, otherwise, more above-mentioned business is switched to second service link from first service link.
Wherein, can be that detection module directly sends to warning information protection switch status machine module, also can be detection module is transmitted to protection switch status machine module by switch decision module with warning information.
Be example with the T-MPLS network below, the service link changing method of the embodiment of the invention is illustrated.In the embodiment of the invention, the link failure fault type comprises loss of connectivity and Client Signal Fail at least, and link failure corresponding service state in system is that (Signal Failure SF), only is that example describes with the loss of connectivity to Signal Fail below.
Example 1, consult shown in the accompanying drawing 4, in the T-MPLS network, configuration detection module (T-MPLS OAM) on a passing node equipments of forming work tunnel and protection tunnel and caudal knot point device, the detection module of passing node equipments carries out detection of connectivity by sending and receive connectivity testing message, when detecting the work tunnel fault of transmission current business, produce the LOC alarm, and this LOC alarm is sent to switch decision module; Switch decision module receives the LOC alarm from detection module, inquire about above-mentioned current business state for there not being request from protection switch status machine module, the row major level of going forward side by side contrast, the priority of determining the loss of connectivity that the LOC alarm is corresponding is higher than no solicited status priority, then produce the service tunnel switching command, and this service tunnel switching command is handed down to handover module; Handover module receives the service tunnel switching command that switch decision module issues, and according to this service tunnel switching command, current business is switched to the protection tunnel from work tunnel.Simultaneously; switch decision module can also pass to the LOC warning information that receives protection switch status machine module; protection switch status machine module is carried out system mode calculating according to the LOC warning information and is upgraded; be about to system mode and be not converted to Signal Fail by there being request; and issuing service tunnel switching command is given handover module; when handover module has run on the protection tunnel in definite current business, ignore the service tunnel switching command of this reception.
Example 2, consult shown in the accompanying drawing 4, in the T-MPLS network, configuration detection module (T-MPLS OAM) on a passing node equipments of forming work tunnel and protection tunnel and caudal knot point device, the detection module of passing node equipments carries out detection of connectivity by sending and receive connectivity testing message, when detecting the protection tunnel fails of transmission current business, produce the LOC alarm, and this LOC alarm is sent to switch decision module; Switch decision module receives the LOC alarm from detection module; and according to the faulty link indication information that comprises in this LOC alarm determine to break down for the protection tunnel time; directly to handover module issuing service tunnel switching command, handover module switches to work tunnel with current business from the protection tunnel according to this service tunnel switching command.
Based on technique scheme; in the embodiment of the invention; detection module produces warning information when detecting service link and break down; switch decision module determines that according to warning information fault type is link failure; and when faulty link is active link; after obtaining the current business state and comparing priority; produce the industry affair link switchover of going forward side by side of service link switching command; and when faulty link is the protection link; directly produce the service link switching command and carry out service link and switch by handover module; thereby avoided by protection switch status machine module according to warning information computing service new state; produce the service link shared time of switching command according to this new state again; the business transmission break period that the service link fault causes be can effectively reduce, service link switching efficiency and service transmission quality improved.And; protection switch status machine can receive the warning information of detection module or switch decision module transmission; when switch decision module produces the service link switching command; protection switch status machine module is according to the warning information computing service new state that receives; produce the service link switching command according to this new state again; and send to handover module; when the service link switching command that sends according to switch decision module at handover module carries out the service link handoff failure; the service link switching command that can send according to protection switch status machine module once more carries out service link and switches, thereby has guaranteed the service link handover success.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. a service link switching device shifter is characterized in that, comprising:
Detection module is used for producing warning information when first service link that the network equipment detects carrying this equipment current business breaks down, and described warning information comprises fault type indication information and faulty link indication information at least;
Switch decision module when being used for the described network equipment and determining that according to described warning information fault type is link failure, produces the service link switching command;
Handover module is used for the described network equipment and according to described service link switching command current business is switched to second service link from described first service link.
2. device as claimed in claim 1; it is characterized in that, further comprise configuration module, be used for before service link switches; the port information that the configuration service link switchover is required; and according to definite active link and the protection link that carries current business of described port information, wherein, first service link is an active link; second service link is the protection link; perhaps, first service link is the protection link, and second service link is an active link.
3. device as claimed in claim 2 is characterized in that, when described switch decision module determines that according to described warning information fault type is link failure, produces the service link switching command, is specially:
When determining that according to described warning information fault type is link failure, if determine that according to described warning information described first service link that breaks down is when protecting link, then directly to produce the service link switching command;
If when determining that according to described warning information described first service link that breaks down is active link, from system, obtain described current state of service, and when the priority of determining this current state is lower than the priority of link failure corresponding service state, produce the service link switching command.
4. as claim 1,2 or 3 described devices, it is characterized in that described link failure comprises loss of connectivity and Client Signal Fail at least.
5. device as claimed in claim 4, it is characterized in that, described detection module sends to described warning information the protection switch status machine module of the described network equipment, calculate the new state of current business according to warning information by described protection switch status machine module, and produce the service link switching command, and this service link switching command is sent to described handover module according to this new state;
After the service link switching command that described handover module sends according to described switch decision module carries out the service link switching; if handoff failure; then the service link switching command that sends according to described protection switch status machine module switches to second service link with current business from first service link.
6. a service link changing method is characterized in that, comprising:
First service link that the detection module of the network equipment detects carrying this equipment current business produces warning information when breaking down, and described warning information comprises fault type indication information and faulty link indication information at least;
When the switch decision module of the described network equipment determines that according to described warning information fault type is link failure, produce the service link switching command;
The handover module of the described network equipment switches to second service link with current business from described first service link according to described service link switching command.
7. method as claimed in claim 6 is characterized in that, detects at detection module before first service link of this equipment of carrying current business, further comprises:
The required port information of configuration module configuration service link switchover in the described network equipment; and according to definite active link and the protection link that carries current business of described port information; wherein; first service link is an active link; second service link is the protection link; perhaps, first service link is the protection link, and second service link is an active link.
8. method as claimed in claim 7 is characterized in that, when the switch decision module of the described network equipment determines that according to described warning information fault type is link failure, produces the service link switching command, is specially:
When determining that according to described warning information fault type is link failure, if determine that according to described warning information described first service link that breaks down is the protection link, then directly produces the service link switching command;
If when determining that according to described warning information described first service link that breaks down is active link, from system, obtain described current state of service, and when the priority of determining this current state is lower than the priority of link failure corresponding service state, produce the service link switching command.
9. as claim 6,7 or 8 described methods, it is characterized in that described link failure comprises loss of connectivity and Client Signal Fail at least.
10. method as claimed in claim 9, it is characterized in that, the detection module of the described network equipment sends to described warning information the protection switch status machine module of the described network equipment, calculate the new state of current business according to described warning information by described protection switch status machine module, and produce the service link switching command, and this service link switching command is sent to described handover module according to this new state;
After the service link switching command that described handover module sends according to described switch decision module carries out the service link switching; if handoff failure; then the service link switching command that sends according to described protection switch status machine module switches to second service link with current business from first service link.
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| CN107888280A (en) * | 2016-09-29 | 2018-04-06 | 中兴通讯股份有限公司 | The two-way reverse method of multiplex section protection, apparatus and system |
| CN107959623A (en) * | 2016-10-18 | 2018-04-24 | 腾讯科技（深圳）有限公司 | A kind of multichannel disaster recovery method and device |
| CN107786436A (en) * | 2017-09-22 | 2018-03-09 | 烽火通信科技股份有限公司 | A kind of VPN and pretection switch method |
| CN107733729A (en) * | 2017-11-30 | 2018-02-23 | 安徽汇鑫电子有限公司 | Signal transmission link monitoring device |
| WO2019201124A1 (en) * | 2018-04-20 | 2019-10-24 | 华为技术有限公司 | Communication method and device for executing master-standby switching using electronic switch |
| CN113364639A (en) * | 2020-03-03 | 2021-09-07 | 成都鼎桥通信技术有限公司 | Transmission link switching method, system and device for small station |
| CN113364639B (en) * | 2020-03-03 | 2023-09-08 | 成都鼎桥通信技术有限公司 | Method, system and device for switching transmission links of small station |
| CN113810281A (en) * | 2020-06-16 | 2021-12-17 | 华为技术有限公司 | Double-homing protection method, system and equipment |
| CN113872790A (en) * | 2020-06-30 | 2021-12-31 | 华为技术有限公司 | Service signal transmission method and network equipment |
| CN113872790B (en) * | 2020-06-30 | 2023-02-24 | 华为技术有限公司 | Service signal transmission method and network equipment |
| CN113765787A (en) * | 2021-08-25 | 2021-12-07 | 新华三大数据技术有限公司 | Fault processing method and device |
| CN113765787B (en) * | 2021-08-25 | 2022-10-21 | 新华三大数据技术有限公司 | Fault processing method and device |
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