CN1503496A - A virtual ring protection method for optical wavelength division network - Google Patents
A virtual ring protection method for optical wavelength division network Download PDFInfo
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- CN1503496A CN1503496A CNA021491585A CN02149158A CN1503496A CN 1503496 A CN1503496 A CN 1503496A CN A021491585 A CNA021491585 A CN A021491585A CN 02149158 A CN02149158 A CN 02149158A CN 1503496 A CN1503496 A CN 1503496A
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Abstract
一种用于光波分网络的虚拟环保护方法，是在每个光口以波长或波长组为单位分别构建多个不同的保护倒换控制实体，形成多个虚拟保护环，再根据各自业务的不同需求，分别采取不同的、最适宜的保护倒换方式，使多种保护方法共存于同一个网络。该方法能够较好地解决现有技术存在的多种缺陷，各个波长可以灵活地选择不同的保护方式，实现了业务保护的多样化，满足不同用户的需求。这样，传输组网时能够更加周到、全面、灵活、方便。
A virtual ring protection method for optical wavelength division network, which is to construct a plurality of different protection switching control entities in units of wavelengths or wavelength groups on each optical port to form multiple virtual protection rings, and then according to the different services of each According to the requirements, different and most suitable protection switching methods are adopted respectively, so that multiple protection methods can coexist in the same network. This method can better solve various defects existing in the prior art, each wavelength can flexibly select different protection modes, realize the diversification of service protection, and meet the needs of different users. In this way, the transmission network can be more thoughtful, comprehensive, flexible and convenient.
Description
Technical field
The present invention relates to a kind of virtual ring guard method that is used for the light wave subnetwork, this method can realize protection to some wavelength of setting in the optical fiber in the wavelength-division transmission network, and need not be defined in whole wavelength is realized protection.Belong to the optical fiber communication technology field.
Background technology
Now, along with dense wave division multipurpose DWDM (Dense Wave-length Division Multiplexing) The Application of Technology, the available bandwidth of simple optical fiber is increasing, and it is more and more important that the self-healed protection of fiber optic network also seems.According to ITU-T suggestion and relevant draft, light wave divides the protected mode of transmission network to mainly contain wavelength channel protection, optical multiplexing section share protect, SNCP etc.Wherein, the optical multiplexing section share protect is widely used a kind of protected mode on the present transmission network, and it includes: 1: N linear multiplex section protection, 2/4 fibre two-way multi-section shared protection etc.The basic principle of optical multiplexing section share protect is to transmit switch messages by the K1 in the frame overhead, K2 byte, thereby realizes the agreement switch function.But because K1, K2 byte are the expenses of multiplex section level, like this, optical fiber light mouth in other words just can only transmit one and overlaps K1, K2 byte; That is to say that general optical multiplexing section is based on the multiplex section of light mouth.Such protection just has a shortcoming: can not realize corresponding protection neatly according to different business, thereby cause the waste of wavelength resource on the light mouth.
At present, why the protected mode of optical transport network has so much kind, is because in different application scenarios, needs to adopt different protected modes.In the occasion that switching time is had relatively high expectations, for example: switching time requires may not reach requirement with the light multi-section shared protection in 20ms, will adopt this time wavelength channel protection to realize; And when the equiblibrium mass distribution formula is professional, relatively be fit to adopt the optical multiplexing section share protect, because it can be protected much larger than wavelength channel by the loaded service capacity.In addition, optical multiplexing section is switched the intrinsic defective of its protocol byte, that is: have only 4 bits to be used to represent node number, so, can only support 16 websites on the ring at most, and the node number on ring just can only adopt other protected mode greater than 16 the time.
Referring to network topology shown in Figure 1, website A, website B, website C and website D constitute ring 101, and website A, website B, website E and website D form ring 102, when the ring 101 of website A, B, C, D composition adopted optical multiplexing sections to share ring protection or optical wavelength path protection, the business between website B or website D and the website E just can't be protected; Equally, when the ring 102 of website A, B, E, D formation adopted optical multiplexing sections to share ring protection or wavelength channel protection, the business between website B or website D and the website C can not realize protection.In fact, under the situation that optical transport network becomes increasingly complex at present, phenomenon recited above is very general, has become the problem that many in the industry personages paid close attention to and sought solution.
In addition; referring to Fig. 2; in actual applications; the business of an Optical Fiber Transmission has multiple: graphic service, speech business, data service, business over strait etc.; another shortcoming of prior art is can not be according to different business demands; select corresponding protection neatly for use, can only realize the share protect of optical multiplexing section level at all wavelengths in the optical fiber, or other package protection.This processing method that is regardless of object, lumps together can not be carried out reasonable use to wavelength resource; Along with the penetration and promotion of dense wave division multipurpose DWDM technology, the contradiction of this disadvantage is more and more outstanding, has hindered the development of optical fiber transmission technique.
Summary of the invention
The purpose of this invention is to provide a kind of virtual ring guard method that is used for the light wave subnetwork; this method can solve the above-mentioned number of drawbacks that prior art exists preferably; the kinds of protect method can be coexisted on a network, thus can be according to the optimum protected mode of the different choice of Optical Fiber Transmission business.
The object of the present invention is achieved like this: a kind of virtual ring guard method that is used for the light wave subnetwork; it is characterized in that: is that unit makes up a plurality of different protections respectively and switches controlled entity at each light mouth with wavelength or set of wavelengths; form a plurality of virtual protection rings; again according to professional separately different demands; take different protection switchover modes respectively, make the kinds of protect method coexist as same network.
This method comprises following operating procedure:
A, with each light mouth from physically being decomposed into more than one minimum protection unit;
B, more than one minimum protection unit in each light mouth is divided into different protections respectively switches in the controlled entity, form more than one protection and switch controlled entity;
C, switch in the controlled entity in each protection, each site works is in one of following four kinds of mode of operations: normal mode of operation, break-through mode of operation, east orientation are switched mode of operation, west to switching mode of operation;
D, when needing protection, by switching action, its each website is switched to other three kinds of mode of operations respectively from normal mode of operation separately.
Among the described step a; minimum protection unit is a wavelength, and all wavelengths of each light mouth is divided into many groups, and every group has one or more wavelength; and every group of wavelength is divided into different protections respectively switches in the controlled entity, form more than one protection and switch controlled entity.
In the described steps d, when a certain protection is switched controlled entity and protection takes place switched, only belong to professional this protection reversed process that just participates in that the wavelength of controlled entity is switched in this protection.
In the described steps d, described protection switching action can be that optical multiplexing section share protect or SNCP or wavelength channel protection or other can be finished the protected mode of same function.
When generation optical multiplexing section share protect was switched, described steps d further comprised following operating procedure:
The controlled entity that d1, configuration protection are switched;
D2, according to the configuration of above-mentioned steps d1, each website generates own intersection data under various mode of operations;
D3, under fault the running protection turning protocol; determine that break-through website, east orientation switch website and west to switching website, and the break-through website issue break-through intersect data, east orientation switch website issue east orientation switch intersect data, issue the west to switching the intersection data in the west to switching website.
In the described steps d 3; determine that break-through website, east orientation are switched website and the west comprises following operating procedure to switching website: when the optical fiber between two websites breaks down; two-way services therebetween all are switched on the rightabout major diameter protection of this fiber optic loop passage; send the website bridge joint; receiving station is switched, all the other each website break-through on the major diameter protection passage after switching.
The present invention is that a kind of virtual ring is switched guard method; this method is serve as that the basis is divided to protect and switched controlled entity with minimum protection unit-" wavelength " or set of wavelengths; because each light mouth has a plurality of minimum units that protect; each light mouth just can be divided into a plurality of protections and switch in the controlled entity; and; controlled entity is switched in each different protection can adopt different protected modes; therefore according to the different demands of business; each wavelength or set of wavelengths can be selected different protected modes neatly, have realized the variation of protected mode.Like this, during transmission group net just more flexibly, convenient.
Because the present invention can be divided into a plurality of protections with same fiber optic transmission system and switch controlled entity; controlled entity is switched in each protection can adopt different protected modes respectively again; broken through the either-or protected mode of prior art, thereby more website can be contained within the protection system.For example; for situation shown in Figure 1; can in 101 rings, make up a virtual optical multiplex section and share rotating loop 101 '; in 102 rings, make up a wavelength channel virtual protection ring 102 ' again; virtual ring 101 ' the included wavelength is the part (annotate: 101 rings comprise all wavelengths of optical fiber link on it) of 101 rings, and same, virtual ring 102 ' the included wavelength is the part of 102 rings; like this, two protections just occur and switched controlled entity corresponding virtual topology ring 101 ' and 102 ' respectively.Although there is part physical link B-A-D to overlap in two virtual rings 101 ' and 102 ', its wavelength resource does not overlap.Like this, the traditional approach website E that can't protect also can be protected in the present invention.Therefore, use after the method for the present invention, the optical multiplexing section ring shares that to switch just no longer be only at the ring protection of optical multiplexing section level (being all wavelength of whole optical fiber), also can be only adopts the virtual optical MSP-ring at wherein part wavelength; Then can provide other protected mode to remaining wavelength,, can realize the variation of service protection, satisfy requirements of different users as wavelength channel protection etc.So the present invention is thoughtful more, comprehensive, flexible to the protection of fiber optic network, has good application prospects.
Description of drawings
Fig. 1 is a kind of schematic diagram of fiber optic network topological structure.
Fig. 2 is the embodiment schematic diagram of an Optical Fiber Transmission business.
Fig. 3 (A), (B) adopt the bi-directional light multiplex section to share the network topology structure figure of an embodiment of rotating loop and at the interconnection graph of a relation of service aisle that has three class websites under the two-way services between B, the D and protection passage.
Fig. 4 is the topological diagram of somewhere networking in the prior art.
Fig. 5 utilizes method of the present invention network shown in Figure 4 to be carried out the embodiment schematic diagram of virtual ring protection.
Embodiment
The present invention is a kind of virtual ring guard method that is used for the light wave subnetwork; it is to share on the rotating loop basis at optical multiplexing section; is that unit makes up a plurality of different protections respectively and switches controlled entity at each light mouth with wavelength or set of wavelengths; form a plurality of virtual protection rings; again according to professional separately different demands; take different protection switchover modes respectively, make the kinds of protect method coexist as same network.
Referring to Fig. 3, the present invention is described in detail below by the specific embodiment of Fig. 3.
Design philosophy of the present invention is based on the light mouth can be divided into wavelength one by one physically, thus with a wavelength as the minimum unit of protection.For example; can regard the optical fiber light mouth of one 32 ripple as independently 32 wavelength, these 32 the minimum units that protect can be divided into some groups, and every group has one or more wavelength; each group is divided into different protections respectively and is switched in the controlled entity, forms more than one protection and switches controlled entity.Because same website can be subordinated to a plurality of basic virtual network topology structures (being foregoing virtual ring); and the protected mode on each basic topological network may be different; therefore; can and regard an integral body as with same basic topology, be called protection and switch controlled entity with the medium physically under a kind of protected mode.This division methods provides possibility for implementing protection flexibly.When a certain protection is switched controlled entity and protection takes place switched, can not influence other protection and switch controlled entity; And have only this protection to switch professional participation protective reversed process on the controlled entity, promptly have logical independence.
Wavelength multiplexing section of the present invention is switched and can be finished with the processing method of " an end bridge joint a, end is switched, the intermediate stations break-through ", and this method can adopt a by way of example of the shared rotating loop of bi-directional light multiplex section as shown in Figure 3 when realizing.Fig. 3 (A) has four website A, B, C, D for a network topology structure in the practical application on this fiber optic loop, the e among the figure, w represent respectively east orientation, west to.The number of wavelengths of supposing every optical fiber is 16.Preceding 2 wavelength of each ring are as service aisle, and follow-up 2 wavelength are as the protection passage, and the outer shroud number consecutively is 1,2,3,4, and interior ring number consecutively is 5,6,7,8, shown in Fig. 3 (B).In addition, Fig. 3 (B) has also represented three class websites: website is switched to switching website, break-through website and east orientation in the west, has the service aisle under the two-way services between B, the D and is protecting the interconnection of passage to concern.Wherein, white box is represented service aisle, the frame representative protection passage of band oblique line.When the optical fiber between two websites of A, D breaks down (shown in Fig. 3 (A)), two-way services between A and the D all are switched on the rightabout major diameter protection of the ring passage, major diameter is the remainder after whole fiber optic loop is removed minor axis, is switched to respectively on the wavelength 3,4 of A-＞B-＞C-＞D and minor axis is the business of the wavelength 5,6 of the link between adjacent node: A-＞D; Wavelength 1,2 business of D-＞A are switched to respectively on the wavelength 7,8 of D-＞C-＞B-＞A.For the business of A-＞D, website A will bridge joint, promptly for transmit leg, when a business when a paths is switched to another paths, transmit leg is called the bridge joint website.D will switch, promptly for the recipient, when a business when a paths is switched to another paths, the recipient is called and switches website.And website B, C will break-through.Equally, professional for D-＞A, website D will bridge joint, and website A will switch, and website B, C will break-through, and promptly website B and C are the break-through website; To switching website, website D is that east orientation is switched website to website A for western.Referring to Fig. 3 (A), because the optical fiber between website A, the D breaks down, that wavelength 5,6 business from B to A are switched, are bridged to respectively is equidirectional (is that wavelength 7,8 business from B to A are switched, are bridged to respectively on the equidirectional wavelength 1,2 on the wavelength 3,4 of A-＞B).Among the figure (A), website C medium wavelength is numbered 3,4,7,8 business break-through respectively.And in website D; the former wavelength business of east orientation service aisle 1,2 of coming is after breaking down between website A, D; be bridged to the west respectively on protection channel wavelength 7,8; originally the business of getting off from east orientation service aisle wavelength 5,6 is switched to the west on protection channel wavelength 3,4 after breaking down between A, D.
As can see from Figure 3, occur fiber failure in optical fiber ring network, in the time of need carrying out multiplex section rearrangement, system need be according to the normal mode of operation and the fault occurrence positions of current each website, analyze the operating state that each website should be in, and issue corresponding intersection data respectively.Here, employing be that virtual ring is switched, what participate in switching is that the wavelength under the controlled entity is switched in this protection, has only preceding 4 wavelength of each optical fiber in Fig. 3 embodiment.Be different from traditional switchover mode, what participate in switching is whole wavelength on the light mouth.Therefore the present invention can dispose the wavelength number that participation is switched according to user's needs, and other wavelength is used for other protection.
Continue to introduce another embodiment of the present invention below and further specify it.
Referring to the topological diagram of somewhere networking in the prior art shown in Figure 4, by counterclockwise, network element A, B, C, D, E, F, G makeup ring 601; Network element H, I, J, K, L, M, N, O makeup ring 602; link to each other with FI by GH between two rings; for ring 601 and ring 602, it is professional to adopt optical multiplexing section share protect mode or other protected mode to come in the guard ring respectively, and can't protect for the interannular business.
Referring to Fig. 5, though the group network topological structure of this optical fiber ring network is identical with Fig. 4 in actual applications since this network using the present invention divide the method that controlled entity is switched in protection, therefore any part at optical networking all can realize protection.Showed the mode of utilizing the present invention that this net is carried out logical partitioning among the figure, wherein the ring shown in the dotted line is two optical fiber ring networks that each network element is formed respectively in the practical application.In logical partitioning shown in Figure 5, according to counterclockwise, form virtual ring 701 by network element A, B, C, D, E, F, G, form virtual ring 702 by network element H, I, J, K, L, M, N, O, form a big virtual ring 703 by network element A, B, C, D, E, F, I, J, K, L, M, N, O, H, G.In virtual ring 701 and virtual ring 702, it is professional to adopt the optical multiplexing section share protect to come in the guard ring, and it is professional then can to adopt wavelength channel protection to come between guard ring to virtual ring 703.In this embodiment; each website all disposes two protections and switches controlled entity; needs according to business; can or be divided into optical multiplexing section with whole wavelength of each optical fiber or the mapping of part wavelength shares in the rotating loop controlled entity; switch controlled entity for the protection of forming virtual ring 703; because it is many that it crosses over website; and the wavelength channel protective ratio is than consumes resources; therefore, generally will one or several wavelength in whole light mouths be mapped to this protection according to what and optical interface level of business switches in the controlled entity.
Claims (7)
1, a kind of virtual ring guard method that is used for the light wave subnetwork; it is characterized in that: is that unit makes up a plurality of different protections respectively and switches controlled entity at each light mouth with wavelength or set of wavelengths; form a plurality of virtual protection rings; again according to professional separately different demands; take different protection switchover modes respectively, make the kinds of protect method coexist as same network.
2, the virtual ring guard method that is used for the light wave subnetwork according to claim 1, it is characterized in that: this method comprises following operating procedure:
A, with each light mouth from physically being decomposed into more than one minimum protection unit;
B, more than one minimum protection unit in each light mouth is divided into different protections respectively switches in the controlled entity, form more than one protection and switch controlled entity;
C, switch in the controlled entity in each protection, each site works is in one of following four kinds of mode of operations: normal mode of operation, break-through mode of operation, east orientation are switched mode of operation, west to switching mode of operation;
D, when needing protection, by switching action, its each website is switched to other three kinds of mode of operations respectively from normal mode of operation separately.
3, the virtual ring guard method that is used for the light wave subnetwork according to claim 2; it is characterized in that: among the described step a; minimum protection unit is a wavelength; the all wavelengths of each light mouth is divided into many groups; every group has one or more wavelength; and every group of wavelength is divided into different protections respectively switches in the controlled entity, form more than one protection and switch controlled entity.
4, according to claim 2 or the 3 described virtual ring guard methods that are used for the light wave subnetwork; it is characterized in that: in the described steps d; when a certain protection is switched controlled entity and protection takes place switched, only belong to professional this protection reversed process that just participates in that the wavelength of controlled entity is switched in this protection.
5, the virtual ring guard method that is used for the light wave subnetwork according to claim 2; it is characterized in that: in the described steps d, described protection switching action can be that optical multiplexing section share protect or SNCP or wavelength channel protection or other can be finished the protected mode of same function.
6, according to claim 2 or the 5 described virtual ring guard methods that are used for the light wave subnetwork, it is characterized in that: when generation optical multiplexing section share protect was switched, described steps d further comprised following operating procedure:
The controlled entity that d1, configuration protection are switched;
D2, according to the configuration of above-mentioned steps d1, each website generates own intersection data under various mode of operations;
D3, under fault the running protection turning protocol; determine that break-through website, east orientation switch website and west to switching website, and the break-through website issue break-through intersect data, east orientation switch website issue east orientation switch intersect data, issue the west to switching the intersection data in the west to switching website.
7, the virtual ring guard method that is used for the light wave subnetwork according to claim 6; it is characterized in that: in the described steps d 3; determine that break-through website, east orientation are switched website and the west comprises following operating procedure to switching website: when the optical fiber between two websites breaks down; two-way services therebetween all are switched on the rightabout major diameter protection of this fiber optic loop passage; send the website bridge joint; receiving station is switched, all the other each website break-through on the major diameter protection passage after switching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021491585A CN1315278C (en) | 2002-11-25 | 2002-11-25 | Virtual ring protection method for optical wave division network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021491585A CN1315278C (en) | 2002-11-25 | 2002-11-25 | Virtual ring protection method for optical wave division network |
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| CN1503496A true CN1503496A (en) | 2004-06-09 |
| CN1315278C CN1315278C (en) | 2007-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021491585A Expired - Fee Related CN1315278C (en) | 2002-11-25 | 2002-11-25 | Virtual ring protection method for optical wave division network |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1812300B (en) * | 2005-01-28 | 2010-07-07 | 武汉烽火网络有限责任公司 | Ring network connection control method, routing and switching equipment, and ring network system |
| CN105991336A (en) * | 2015-03-02 | 2016-10-05 | 中国移动通信集团内蒙古有限公司 | Protective network and protection method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1161014A1 (en) * | 2000-05-31 | 2001-12-05 | PIRELLI CAVI E SISTEMI S.p.A. | Autoprotected optical communication ring network |
| CN1184752C (en) * | 2001-02-05 | 2005-01-12 | 华为技术有限公司 | Method and device for virtual protection of optical fiber path |
| US20020106146A1 (en) * | 2001-02-08 | 2002-08-08 | Richard Lauder | Optical network structure |
-
2002
- 2002-11-25 CN CNB021491585A patent/CN1315278C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1812300B (en) * | 2005-01-28 | 2010-07-07 | 武汉烽火网络有限责任公司 | Ring network connection control method, routing and switching equipment, and ring network system |
| CN105991336A (en) * | 2015-03-02 | 2016-10-05 | 中国移动通信集团内蒙古有限公司 | Protective network and protection method thereof |
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| CN1315278C (en) | 2007-05-09 |
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