CN101483549B - Protection switching method, apparatus and system - Google Patents
Protection switching method, apparatus and system Download PDFInfo
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- CN101483549B CN101483549B CN2009100774891A CN200910077489A CN101483549B CN 101483549 B CN101483549 B CN 101483549B CN 2009100774891 A CN2009100774891 A CN 2009100774891A CN 200910077489 A CN200910077489 A CN 200910077489A CN 101483549 B CN101483549 B CN 101483549B
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Abstract
An embodiment of the invention provides a protection switching method, a device and a system thereof, wherein the protection switching method comprises the following steps: respectively establishing path of data transmission to the data transmission end through an operating link and a protecting link, and receiving service data from the data transmission end through the operating link; receiving detection information from the operating link and the protecting link; when the operating link is determined to be generated with a failure according to the detection information, transmitting notifying information indicating circuit switching to the data transmission end; and receiving the service data transmitted from the data transmission end through the protecting link. The embodiment of the invention also provides a protection switching device and a protection switching system correspondingly. The protection switching method, the device and the system provided by the embodiment of the invention can increase the protection switching efficiency, reduce the data loss in the protection switching process and increase the transmission quality of service data.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of protection reverse method, device and system.
Background technology
Operation maintenance (Operations; Administration and Maintenance; Hereinafter to be referred as: OAM) and APS (Automatic Protection Switching, hereinafter to be referred as: APS) technique functions comes from asynchronous transfer mode (Asynchronous Transfer Mode is hereinafter to be referred as ATM) field; Along with continuous enhancing to the requirement of network telecommunications; OAM, APS have become the standard configuration technology of main flow router, Metro Ethernet field product, and operator also has higher requirement to the IP operation bearer network, for example 10ms circuit error correction, 50ms level route protection technology etc.
OAM has defined the line errors testing mechanism, and corresponding with it APS is meant when a communication line in the network breaks down, and uses an other circuit to continue the transmission data through selector switch.
But in the business data transmission process, the switching of circuit tends to cause losing of data, and the process of switching meeting holding time, influences the efficient of system.
Summary of the invention
The purpose of the embodiment of the invention provides a kind of protection reverse method, device and system, protect the efficient of switching to improve, and the assurance data can not lost because circuit switches.
The embodiment of the invention provides a kind of protection reverse method, comprising:
Set up the path of transfer of data respectively with data sending terminal through working line and protection circuit, said working line directly is connected with data sink with protection circuit, and receives business datum through said working line from said data sending terminal;
Receive detection information from said working line or protection circuit;
During according to said detection information judgment task line fault, send indication to data sending terminal and carry out circuit-switched notification message;
Receive business datum through said protection circuit from said data sending terminal.
The embodiment of the invention also provides a kind of protection changeover apparatus, comprising:
First receiver module is used to receive the detection information of working line or protection circuit transmission;
Second receiver module directly is connected with protection circuit with said working line, is used for receiving business datum from one of said working line and protection circuit;
Sending module is used for when judging the line failure of the said business datum of current transmission according to said detection information, sends indication to data sending terminal, uses an other circuit service data transmission with the notice transmitting terminal.
The embodiment of the invention also provides a kind of protection exchanging system; Comprise data sending device, data sink, working line and protection circuit; Said data sending device is set up the path of transfer of data respectively with said data sink through said working line and said protection circuit; Said data sending device directly is connected with protection circuit with said working line; Said data sending device only sends business datum through one in said working line and the said protection circuit to said data sink; And when in said working line and the said protection circuit just during the line failure at service data transmission, said data sending device switches to the transmission of business datum on the other circuit.
Protection reverse method, device and system that the embodiment of the invention provides; Line selector, data is not set in connecing receiving system; Working line and protection circuit all directly are connected with data sink; Therefore protecting when switching, can not carry out circuit at data receiver and switch, this execution mode can improve the efficient that protection is switched.Further owing to remained data path between data receiver and the data sending terminal, can be when circuit switches because of the unexpected interruption of transfer of data packet loss.
Description of drawings
Fig. 1 is a kind of schematic flow sheet of protecting reverse method embodiment of the present invention;
Fig. 2 is the schematic flow sheet of the another protection reverse method of the present invention embodiment;
Fig. 3 is a kind of structural representation of protecting changeover apparatus embodiment of the present invention;
Fig. 4 is the structural representation of the another protection changeover apparatus of the present invention embodiment;
Fig. 5 protects the structural representation of exchanging system embodiment for the present invention;
Fig. 6 is the protection exchanging system configuration diagram of a specific embodiment of the present invention;
Fig. 7 is the schematic flow sheet of a specific embodiment of the present invention.
Embodiment
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
In existing protection exchanging system; Use line selector at data sink; When detecting line fault; Need carry out circuit-switched situation, wherein for 1: 1 protection switchover mode, data sink can not receive the business datum that protection circuit and working line transmit simultaneously.So do not use line selector in the data sink in embodiments of the present invention, and obtain the business datum that transmitting terminal sends but directly be connected with working line with protection circuit, when line fault took place, data receiver no longer carried out circuit and switches.Fig. 1 is a kind of schematic flow sheet of protecting reverse method embodiment of the present invention, and is as shown in Figure 1, and the protection reverse method that the embodiment of the invention provided is used for receiving terminal, and it comprises the steps:
It will be appreciated that in embodiments of the present invention, said data receiver both can be received in the data of transmitting on the said working line, also may be received in the data of transmitting on the said protection circuit.Further, in embodiments of the present invention, said data receiver only can receive business datum through one in said working line and the protection circuit at synchronization.
What need confirm is in embodiments of the present invention, at synchronization, a service data transmission only to be arranged in said working line or the protection circuit.
As shown in Figure 2, corresponding to the protection reverse method in the foregoing description, data sending terminal is carried out following steps:
Said data receiver both can be received in the data of transmitting on the said working line, also may be received in the data of transmitting on the said protection circuit.
Data receiver directly is connected with working line and protection circuit when carrying out Data Receiving in the present embodiment, carries out the reception of business datum; And do not comprise line selector; Therefore when line fault takes place, the circuit handoff procedure need be do not carried out, the time loss of protection reversed process can be reduced; Minimizing is switched the data-bag lost that causes because of protection and is increased, and therefore also can improve business data transmission quality.
In the above embodiments, when receiving the detection information of working line or protection circuit transmission, data receiver also utilized the business datum of working line or protection circuit transmission before receiving lines switches.Detection information wherein can be detection of connectivity (Connectivity Verification; Hereinafter to be referred as: CV) message; Also can be other continuous probe message; In the concrete implementation process, a circuit in working line or the protection circuit carries out business data transmission, and the transmission of the property surveyed message simultaneously on two circuits.
Fig. 3 is a kind of structural representation of protecting changeover apparatus embodiment of the present invention; As shown in Figure 3; Comprise: first receiver module 11, second receiver module 12 and sending module 13, wherein first receiver module 11 is used to receive the detection information of working line or protection circuit transmission; Second receiver module 12 links to each other with protection circuit with said working line, is used for receiving business datum from one of said working line and protection circuit; Sending module 13 is used for when judging the line failure of the said business datum of current transmission according to said detection information, sends indication to data sending terminal, uses an other circuit service data transmission with the notice transmitting terminal.
Protection changeover apparatus in the present embodiment can be meant the data receiver equipment with protection switch function, does not wherein comprise line selector, and second receiver module that receives data directly is connected with two circuits; Obtain the data that working line and protection circuit send, when line fault takes place, need not carry out circuit at data receiver and switch; Directly the notification data transmitting terminal carries out the circuit switching; Wait for that at second receiver module receiving business datum gets final product, the execution mode of present embodiment can reduce the protection required time of reversed process, improves protection and switches efficient; Minimizing is switched the packet loss that causes because of protection takes place, and improves business data transmission quality.
Sending module can be divided into judging unit and transmitting element, and judging unit is used for judging whether to take place line fault according to said detection information; When judgment unit judges generation line fault, transmitting element sends indication to data sending terminal and carries out circuit-switched notification message.
Fig. 4 is the structural representation of the another protection changeover apparatus of the present invention embodiment; As shown in Figure 4; Comprise: data transmission blocks 21 and handover module 22, wherein data transmission blocks 21 is connected with protection circuit with working line, and sends business datum through working line to said data receiver; Handover module 22 is used for receiving after indication that data receiver sends carries out circuit-switched notification message, and the transmission of business datum is switched on the said protection circuit.Data sending terminal in the present embodiment carries out the switching of transmission lines after circuit-switched notification message is carried out in the indication that receives the data receiver transmission, with the smooth transmission of realization business datum,
Protection changeover apparatus in the foregoing description can further include information sending module 23, and information sending module 23 is used for sending detection information through working line or said protection circuit to said receiving terminal.Data receiver can detect the operating state of information testing circuit or protection circuit through this.
Fig. 5 protects the structural representation of exchanging system embodiment for the present invention; As shown in Figure 5; Comprise data sending device 31, data sink 32, working line 33 and protection circuit 34; Data sending device 31 is set up the path of transfer of data respectively with data sink 32 through working line 33 and protection circuit 34; Data sending device 31 only sends business datums through one in said working line 33 and the said protection circuit 34 to said data sink 32; And when in said working line 33 and the said protection circuit 34 just during the line failure at service data transmission, said data sending device 31 switches to the transmission of business datum on the other circuit.
Protection exchanging system in the present embodiment; Data sink wherein is not provided with line selector, and takes direct and working line and protection circuit ways of connecting, when detecting line fault; Data sink need not carry out circuit-switched step; Carry out circuit-switched notification message but directly send indication to data sending device, data sending device carries out circuit according to this notification message and switches, and accomplishes the protection reversed process.The protection exchanging system that provides in the present embodiment; In that taking place, line fault protects when switching data receiver need not carry out circuit to switch, can improve protection and switch efficient, shorten protection switch time; Datagram loses the raising business data transmission quality in the minimizing protection reversed process; The situation of especially switching for training can guarantee all business datums all by correct reception, thereby effectively avoids the problem of service disconnection.
Data sink in the foregoing description can further be divided into first receiver module, first sending module and second receiver module, and wherein first receiver module is used to receive the detection information of working line or protection circuit transmission; First sending module is used for when judging generation line fault according to said detection information, sending indication to data sending device and carrying out circuit-switched notification message; Second receiver module joins through said working line and said protection circuit and said data sending device all the time, is used to receive the business datum that data sending terminal utilizes working line or protection circuit to transmit after before circuit switches, switching with circuit.Data sending device can be divided into second sending module and line selector, and second sending module is used for sending business datum to data sink; Line selector is used for carrying out circuit when carrying out circuit-switched notification message and switching receiving indication.
Fig. 6 is the protection exchanging system configuration diagram of a specific embodiment of the present invention; As shown in Figure 6; The directly merger after receiving working line and protecting the data of transmitting behind the LSP of the data combiner 2 of data receiver path merge way label router (PML) 1; Need not remove to select one of which according to the state of LSP, the line selector 4 of data sending terminal (PSL) 3 still keeps, and carries out the circuit switching based on local message.Utilize the defective of CV message (also can be other continuity probe messages) testing circuit and protection LSP simultaneously; These detection messages are inserted in the business datum of transmission by message insert module 5 PML's; The message extraction module 6 of PML carries out the CV message and extracts; When on the working line from PSL when the direction of PML breaks down, can from the CV message that PML extracts, obtain.Also having a kind of situation in addition is when Forced Switch takes place; Data sending terminal initiatively switches by protecting LSP to send business datum; Can be at first carry out circuit at data sending terminal PSL this moment and switch, (Forward Defect Indication is hereinafter to be referred as FDI) message, CV message and business datum by protection LSP transmission forward direction defective indication; And can directly receive business datum at data receiver, and need not carry out receiving business datum again after circuit switches.In the time of need carrying out the circuit switching for using protection LSP service data transmission equally, such scheme also is suitable for.
Fig. 7 is for the schematic flow sheet of a specific embodiment of the present invention, and is as shown in Figure 7, under the situation that has defective on the working line, protects to switch to handle to comprise following flow process:
In step 302, when detecting the fault generation, the circuit that does not carry out on the PML switches in the present embodiment; Can improve protection and switch efficient; Reduce the protection required time of reversed process, reduce the data-bag lost in the protection reversed process, improve business data transmission quality.
Protection reverse method, device and system that the embodiment of the invention provides; At data receiver line selector is not set, but working line is connected with data sink directly with protection LSP, protects when switching in that line fault takes place; Data receiver does not need to carry out circuit-switched step again; Switch efficient thereby can improve protection, reduce the loss of data in the data reversed process, business data transmission quality is provided.
What should explain at last is: above embodiment is only in order to technical scheme of the present invention to be described but not limit it; Although the present invention has been carried out detailed explanation with reference to preferred embodiment; Those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement technical scheme of the present invention, also can not make amended technical scheme break away from the spirit and the scope of technical scheme of the present invention and these are revised or be equal to replacement.
Claims (6)
1. a protection reverse method is characterized in that, comprising:
Set up the path of transfer of data respectively with data sending terminal through working line and protection circuit; Data sink only receives business datum through one in said working line and the protection circuit at synchronization; Said working line directly is connected with data sink with protection circuit, and receives business datum through said working line from said data sending terminal;
Receive detection information from said working line or protection circuit;
During according to said detection information judgment task line fault, send indication to data sending terminal and carry out circuit-switched notification message;
Receive business datum through said protection circuit from said data sending terminal.
2. protection reverse method according to claim 1 is characterized in that, the said detection information that receives is connectivity testing message.
3. a protection changeover apparatus is characterized in that, comprising:
First receiver module is used to receive the detection information of working line or protection circuit transmission;
Second receiver module directly is connected with protection circuit with said working line, is used for only receiving business datum from one of said working line and protection circuit at synchronization;
Sending module is used for when judging the line failure of the said business datum of current transmission according to said detection information, sends indication to data sending terminal, uses an other circuit service data transmission with the notice transmitting terminal.
4. protection changeover apparatus according to claim 3 is characterized in that, said sending module comprises:
Judging unit is used for judging whether to take place line fault according to said detection information;
Transmitting element is used for when judgment unit judges generation line fault, sends indication to data sending terminal and carries out circuit-switched notification message.
5. protect exchanging system for one kind; Comprise data sending device, data sink, working line and protection circuit; It is characterized in that; Said data sending device is set up the path of transfer of data respectively with said data sink through said working line and said protection circuit; Said data sending device directly is connected with protection circuit with said working line; Said data sending device only sends business datum through one in said working line and the said protection circuit to said data sink at synchronization, and when in said working line and the said protection circuit just during the line failure at service data transmission, said data sending device switches to the transmission of business datum on the other circuit.
6. protection exchanging system according to claim 5 is characterized in that, said data sink comprises:
First receiver module is used to receive the detection information of working line or protection circuit transmission;
First sending module is used for when judging generation line fault according to said detection information, sending indication to data sending device and carrying out circuit-switched notification message;
Second receiver module joins through said working line and said protection circuit and said data sending device all the time, is used to receive the business datum that data sending terminal utilizes working line or protection circuit to transmit after before circuit switches, switching with circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100774891A CN101483549B (en) | 2009-02-13 | 2009-02-13 | Protection switching method, apparatus and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100774891A CN101483549B (en) | 2009-02-13 | 2009-02-13 | Protection switching method, apparatus and system |
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| CN101483549A CN101483549A (en) | 2009-07-15 |
| CN101483549B true CN101483549B (en) | 2012-05-23 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102739982A (en) * | 2012-05-29 | 2012-10-17 | 浙江大华技术股份有限公司 | Digital video matrix cascade system as well as communication device and method thereof |
| CN104954248B (en) * | 2014-03-27 | 2018-04-20 | 华为技术有限公司 | Message transmission pretection switch method, equipment and system |
| CN104935457B (en) * | 2015-04-28 | 2018-02-27 | 瑞斯康达科技发展股份有限公司 | A kind of pretection switch method and system, the protection equipment of E1 circuits |
| CN112073245B (en) * | 2017-09-21 | 2023-05-09 | 中国移动通信有限公司研究院 | OAM message transmission method, transmission equipment and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1441574A (en) * | 2002-02-26 | 2003-09-10 | 日本电气株式会社 | High speed switchover route using automatic protective switchover and its switchover method |
| CN1459160A (en) * | 2000-07-20 | 2003-11-26 | 北方电讯网络有限公司 | Apparatus and method for optical communication protection |
| CN101304346A (en) * | 2008-06-27 | 2008-11-12 | 北京星网锐捷网络技术有限公司 | Method and apparatus for monitoring link |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1459160A (en) * | 2000-07-20 | 2003-11-26 | 北方电讯网络有限公司 | Apparatus and method for optical communication protection |
| CN1441574A (en) * | 2002-02-26 | 2003-09-10 | 日本电气株式会社 | High speed switchover route using automatic protective switchover and its switchover method |
| CN101304346A (en) * | 2008-06-27 | 2008-11-12 | 北京星网锐捷网络技术有限公司 | Method and apparatus for monitoring link |
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