CN113840183A - Photoelectric multilayer rerouting protection cooperation method and device - Google Patents
Photoelectric multilayer rerouting protection cooperation method and device Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
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- H—ELECTRICITY
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0081—Fault tolerance; Redundancy; Recovery; Reconfigurability
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0083—Testing; Monitoring
Abstract
The invention relates to the technical field of SDN centralized routing calculation, and provides a photoelectric multilayer rerouting protection cooperation method and device. The method includes setting a first optical layer traffic rerouting to a locked state so as to prohibit the first optical layer traffic rerouting; setting the first optical layer service affected by the interruption of the first connecting fiber as a rejection condition, and calculating a rerouting path of the first electrical layer service; and if the first electrical-layer service can obtain a route again by utilizing the residual capacity of other existing second optical-layer services, switching the first electrical-layer service to a rerouting path formed by the residual capacity of the second optical-layer service, thereby recovering the first electrical-layer service. The invention emphasizes the protection of the optical and electric cooperative rerouting in the centralized computation path, and ensures that the electric layer rerouting is preferentially carried out after the service is broken, thereby rapidly recovering the service.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of SDN centralized routing, in particular to a photoelectric multilayer rerouting protection cooperation method and device.
[ background of the invention ]
The current situation and evolution route of the current OTN network control plane are 1, distributed ASON; 2. centralized control + distributed ASON control; 3. open collaborative SDN.
At present, the practical engineering application of the OTN network at home and abroad still remains in the 1 st stage, namely, distributed ASON. Rerouting is a service restoration method, when an LSP on an SPC service path is interrupted, a head node calculates an optimal path for service restoration, then establishes a new LSP through signaling, and transmits the service by the new LSP, which is the definition of rerouting in stage 1.
For cross-layer support, the ASON does not well support multi-layer networks such as photoelectric hybrid crossing, IP + optical collaboration, and the like, that is, because the problem of multi-layer collaboration is difficult to handle in a distributed manner, the SDN centralized controller has multi-layer network topology and service information, and is very suitable for cooperative scheduling of the multi-layer network. For future FlexGrid and FlexRate, compared with the current FixGrid, a centralized complex routing algorithm is needed to better allocate wavelength spectrum resources.
Optical layer rerouting: when the optical layer service (such as A-B) is interrupted, its re-route is to find other available physical links (such as A-C-B, where there is a normal physical link between A-C and C-B) to recover the optical layer service.
Electrical layer rerouting: when a power-layer service (e.g., D-E) is interrupted, its rerouting is to find other available optical-layer services (e.g., D-F-E, where D-F, F-E are two existing optical-layer services, or D-F-E is one existing optical-layer service) to restore the power-layer service.
The electrical layer rerouting only involves switching different optical paths because the optical paths are through (optical layer services exist), so that the speed is high, and services can be recovered by generally expressing millisecond-level engineering.
Optical layer rerouting involves the opening of optical paths on a physical link (a new optical layer service needs to be created by using an existing optical fiber to open the optical paths), so that time is consumed, and the optical layer rerouting is performed on the order of seconds or even minutes in general engineering.
How to complete rerouting protection in a scene that the services of an optical layer and a power layer in the whole network exist simultaneously and rerouting needs to be supported in a scene of fiber connection interruption. In existing solutions, there is also no complete solution to handle optical + electrical cooperative rerouting.
In view of the above, overcoming the drawbacks of the prior art is an urgent problem in the art.
[ summary of the invention ]
The technical problem to be solved by the invention is how to complete rerouting protection in a scene that the services of an optical layer and a charge layer in the whole network exist simultaneously and rerouting needs to be supported in a scene of fiber connection interruption. A comprehensive and efficient rerouting solution is lacked in the prior art, and a conventional rerouting solution in the prior art is relatively low in efficiency and cannot adapt to higher and higher network quality environment requirements.
The invention adopts the following technical scheme:
in a first aspect, the present invention provides a method for protecting and coordinating an optoelectronic multi-layer rerouting, which detects a physical link state, and determines that a first optical layer service runs on the first optical layer service and a first electrical layer service runs on the first optical layer service, where the method includes:
setting a first optical layer service rerouting state so as to prohibit the first optical layer service rerouting;
setting a first optical layer service affected by first fiber connection interruption as a rejection condition, and performing first electrical layer service rerouting path calculation to avoid finding the first optical layer service again when the first electrical layer service is rerouted;
and if the first electrical-layer service can obtain a route again by utilizing the residual capacity of other existing second optical-layer services, switching the first electrical-layer service to a rerouting path formed by the residual capacity of the second optical-layer service, thereby recovering the first electrical-layer service.
Preferably, after restoring the first electrical-layer service, the method further comprises:
unlocking the first optical layer service with the rerouting locking state, and starting rerouting of the first optical layer service;
if the first optical layer service can obtain a route by using other physical links in normal states, the rerouting of the first optical layer service is successful, and the first optical layer service is switched to a rerouting path to recover the first optical layer service.
Preferably, the method further comprises:
when the first electric layer service is rerouted, if the idle bandwidth of the existing other optical layer services is not enough to recover all the first electric layer services, the first electric layer service rerouting fails, and the first electric layer service is interrupted.
Preferably, the first optical layer service runs on the first connection fiber, and the confirmation process that the first electrical layer service runs on the first optical layer service includes:
judging whether the optical layer service passes through a first connection fiber or not according to the original port of each hop in the optical layer service RouteDetail;
and for the optical layer service passing through the first optical fiber, issuing a query instruction to query the electrical layer service running on the corresponding optical layer service.
Preferably, after the rerouting of the first optical layer service is successful, the method further includes:
if the first electrical-layer service which has finished rerouting is a returning type service, starting the returning timing of the first electrical-layer service after the successful rerouting of the first electrical-layer service is confirmed; and after the return time is reached, switching back the returnable first electrical-layer service from the rerouting path to the original optical-layer service path, and releasing resources in the second optical-layer service occupied by the rerouting path.
Preferably, the method comprises:
for the optical layer service passing through the first connecting fiber, issuing a query instruction, and querying Return attribute and Return time of the corresponding electrical layer service;
wherein, for the traffic whose Return attribute is TRUE, it is the Return electrical layer traffic.
Preferably, after the return time, a switch back is started, the first electrical-layer service capable of returning is switched back from the rerouting path to the original optical-layer service path, and the second optical-layer service resource occupied by the rerouting path is released, which specifically includes:
inquiring CurrentRouteDetail of a current path of the first optical layer service and OriginalRouteDetail of an original path, comparing the CurrentRouteDetail with the OriginalRouteDetail, and calculating optical routing nodes needing to be deleted and/or added;
and according to the optical routing nodes which are deleted and/or added as required, switching the service running path to the original path.
Preferably, when detecting the physical link status and determining that the first optical layer service is recovered from the interruption to the normal status, if the first optical layer service belongs to the returnable service, the method further includes:
confirming whether a first optical layer service to be cut back is loaded with an electrical layer service;
if the first optical layer service to be back-cut bears the electrical layer service, suspending the timing of the return of the first optical layer service, and starting to reroute the electrical layer service borne on the first optical layer service to be back-cut; setting the optical layer service to be cut back as a rejection condition to calculate the electrical layer service rerouting path;
and if the electrical-layer service is successfully rerouted, switching back the first optical-layer service to the corresponding path in the recovered first connection fiber.
Preferably, the switching the first electrical-layer service to the rerouting path formed by the remaining capacity of the second optical-layer service specifically includes:
inquiring the optical layer service existing in the current network, and filtering out a second optical layer service which does not pass through a fiber breaking point according to RouteDetail in an inquiry result;
querying the residual bandwidth of the second optical layer service, wherein the process of querying the residual bandwidth of the second optical layer service comprises calling a CalBandWidth interface and calculating the residual bandwidth; the CalBandWidth interface acquires the total bandwidth according to the ServiceType attribute of the current optical layer service, calls QueryClientServicie to acquire the loaded client layer service and calculates the bandwidth occupied by all the client layer services, wherein the total bandwidth-the bandwidth occupied by the client layer is the residual bandwidth of the optical layer service;
and obtaining the bandwidth of a single electric layer service according to the ServiceType of each electric layer service, and adding all the electric layer service bandwidths to obtain the total bandwidth of the electric layer service to be rerouted.
In a second aspect, the present invention further provides an optoelectronic multi-layer rerouting protection coordination apparatus, configured to implement the optoelectronic multi-layer rerouting protection coordination method in the first aspect, where the apparatus includes:
at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executable by the processor to perform the optoelectronic multi-layer rerouting protection coordination method of the first aspect.
In a third aspect, the present invention further provides a non-volatile computer storage medium, where the computer storage medium stores computer-executable instructions, which are executed by one or more processors, for implementing the optoelectronic multi-layer rerouting protection coordination method according to the first aspect.
The invention emphasizes the protection of the optical and electric cooperative rerouting in the centralized computation path, and ensures that the electric layer rerouting is preferentially carried out after the service is broken, thereby rapidly recovering the service. A set of rerouting method supporting photoelectric hybrid crossing, electric and optical cooperation and the like under a multi-layer network is provided by utilizing a centralized calculation method.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic flow chart of a cooperative method for protecting a photoelectric multilayer rerouting, according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a further completed method for protecting and coordinating optical multi-layer rerouting according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a cooperative method for protecting a photoelectric multi-layer rerouting, according to an embodiment of the present invention;
fig. 4 is a schematic flow chart illustrating a back-cut in a cooperative method for protecting a photoelectric multi-layer rerouting, according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of a cooperative method for protecting a photoelectric multi-layer rerouting, according to an embodiment of the present invention;
fig. 6 is a schematic flow chart illustrating a cutback presented by using a function interface in the cooperative method for protecting photoelectric multi-layer rerouting according to the embodiment of the present invention;
fig. 7 is a schematic flowchart illustrating a cutback presented by using a function interface in a cooperative method for protecting optical-electrical multi-layer rerouting according to an embodiment of the present invention;
fig. 8 is a schematic flowchart of rerouting presented by using a function interface in a cooperative method for protecting photoelectric multilayer rerouting provided by an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an optoelectronic multi-layer rerouting protection cooperative apparatus according to an embodiment of the present invention.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, the terms "inner", "outer", "longitudinal", "lateral", "upper", "lower", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are for convenience only to describe the present invention without requiring the present invention to be necessarily constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
At present, in the aspect of intelligent services, engineering application generally adopts a distributed computation path triggered by a control plane layer, and a centralized computation path of an SDN is only tested in a laboratory environment at present and has no practical engineering application. The method supports both optical layer rerouting and electrical layer rerouting, while the recovery time lengths of the optical layer and the electrical layer are greatly different, the time for optical layer rerouting is in the order of seconds or even minutes, and the rerouting time of the electrical layer is in the order of milliseconds. When optical layer and electrical layer services exist simultaneously, when a physical link failure occurs, rerouting is performed on the optical layer service firstly, rerouting is performed on the electrical layer firstly, rerouting is performed on the optical layer and the electrical layer simultaneously, and when the optical layer and the electrical layer are rerouted simultaneously, how to ensure that the optical layer and the electrical layer do not influence each other is the problem needing centralized routing calculation.
In the patent claims, the functions related to rerouting, switch back, return/non-return, rerouting locking/unlocking, return timing and the like are the existing specific function functions, which are all supported by the current rerouting and are not the contents newly proposed by the invention of the patent. The patent focuses on a method for optical and electrical cooperative rerouting, and provides a set of complete solution by controlling optical layer and electrical layer service rerouting locking, rerouting unlocking, return timing starting, return timing suspending and the like, and is used for solving the problem of service interruption caused by simultaneous rerouting when optical and electrical service is interrupted by connecting fibers.
The device entities in the system architecture of the present scheme include, in summary, three types: SDN controller, NMS-Control (network management Control), optical path Control device. And the SDN controller is responsible for monitoring the network state and triggering some key actions in the optical and electrical rerouting process. And the NMS-Control is responsible for responding to the command of the SDN controller, decomposing the command into a device command, issuing the device command to the light path Control device, and storing the information of the optical and electric services, the topological information and the like. And the optical path Control equipment is responsible for executing the equipment instruction issued by the NMS-Control to switch the path of the service and ensure the normal operation of the service. In the following description of the embodiments of the present invention, for clarity of description, the implementation process of the method will be also described in conjunction with the system architecture described above.
It should be noted that, in the embodiment of the present invention, the definitions of "first" and "second" are only for convenience of description, and two individuals of the same type can be distinguished, however, the "first" and "second" do not have special technical limitations (for example, a sequence is defined), and may also be similarly expressed as "optical layer service a" and "optical layer service B", and so on, and are not described in detail herein.
In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1:
embodiment 1 of the present invention provides a method for protecting and coordinating a photoelectric multi-layer rerouting, where before implementing the method of the present invention, it is determined that a first optical layer service runs on a first optical layer service by detecting a physical link state, and the first optical layer service runs on the first optical layer service, where as shown in fig. 1, the method includes:
in step 201, a first optical layer traffic rerouting is set to a locked state so as to prohibit the first optical layer traffic rerouting.
The locking process may be that the SDN controller issues a rerouting locking command to the NMS-Control. And after the NMS-Control receives the command, the ReRoute-Locked attribute of the corresponding service is modified into TRUE.
And the matched unlocking process which will be involved in the subsequent content of the invention can be that the SDN controller issues a rerouting locking command to the NMS-Control. And after the NMS-Control receives the command, the ReRoute-Locked attribute of the corresponding service is modified into FALSE.
In step 202, the first optical layer service affected by the first fiber connection interruption is set as a rejection condition, and the first electrical layer service rerouting path is calculated to avoid finding the first optical layer service again when the first electrical layer service is rerouted. Wherein the exclusion condition includes a port for the particular optical traffic and information related to characterizing the first optical traffic.
In a specific implementation scenario, the above electrical-layer traffic rerouting may be represented as:
the SDN controller sends a query instruction to the NMS-Control, queries the optical layer service existing in the current network, and filters out a second optical layer service which does not pass through a fiber breaking point according to RouteDetail in a query result; the SDN controller sends a query instruction to NMS-Control, and queries the residual bandwidth of the second optical layer service, wherein the process of querying the residual bandwidth of the second optical layer service comprises calling a CalBandWidth interface and calculating the residual bandwidth; the CalBandWidth interface acquires the total bandwidth according to the ServiceType attribute of the current optical layer service, calls QueryClientServicie to acquire the loaded client layer service and calculates the bandwidth occupied by all the client layer services, wherein the total bandwidth-the bandwidth occupied by the client layer is the residual bandwidth of the optical layer service; the bandwidth of each electrical layer service can be obtained according to the ServiceType of the electrical layer service, and the total bandwidth of the electrical layer services to be rerouted is obtained by adding the bandwidths of all the electrical layer services.
In step 203, if the first electrical-layer traffic can be rerouted using the remaining capacity of the other existing second optical-layer traffic, the first electrical-layer traffic is switched to a reroute path made up of the remaining capacity of the second optical-layer traffic, thereby restoring the first electrical-layer traffic.
The embodiment of the invention emphasizes the protection of the optical and electric cooperative rerouting in the centralized computing path, and ensures that the electric layer rerouting is preferentially carried out after the service is broken, thereby rapidly recovering the service. A set of rerouting method supporting photoelectric hybrid crossing, electric and optical cooperation and the like under a multi-layer network is provided by utilizing a centralized calculation method.
As a possible scenario of a complete solution, in conjunction with the embodiment of the present invention, it is an expedient to recover the electrical-layer services in the completion step 203, that is, to use the remaining capacity of other optical-layer services to implement rerouting of the electrical-layer services, but at this time, the corresponding first optical-layer services that were originally failed due to the interruption of the first optical fiber are not recovered normally; as a more reasonable solution, the physical link (i.e. other fiber) that still needs to go to the normal state is searched for the first optical layer traffic route that can recover the normal (relative to the special state in example 1 that uses the remaining capacity of the existing second optical layer traffic, the second optical layer traffic specifically configured for the corresponding second optical layer traffic can be considered as the normal state) carrying the first optical layer traffic, as shown in fig. 2, the method further includes:
in step 204, the first optical layer traffic with the rerouting lock status set is unlocked, and rerouting of the first optical layer traffic is started.
Referring to a more complete method process diagram presented in fig. 3, the process of the above steps 201 and 204 corresponds to the process marked by the dashed box in fig. 3.
In step 205, if the first optical layer service can obtain a route by using other physical links in a normal state, the rerouting of the first optical layer service is successful, and the first optical layer service is switched to a rerouting path to recover the first optical layer service.
As can be seen from fig. 3, before the "reaching the return time, the first optical layer service starts to switch back to the original first optical layer service" is executed, the above step 205 is preferably executed. At some point, the step 205 may be understood as a parallel process as compared with fig. 3, or as a process executed in the background, and the return time is reached in the corresponding figure, or the timing process may be triggered after the step 205 is completed.
At this time, as an optional implementation manner, after the first optical layer traffic is recovered, the corresponding first optical layer traffic temporarily switched to the remaining capacity of the second optical layer traffic to re-obtain routing is preferably switched back to the recovered first optical layer traffic. This is because the focus considered by the embodiments of the present invention is on how to implement electrical-layer traffic rerouting in the case of a fiber connection interruption, with as little impact on electrical-layer traffic as possible. Because the inventor finds that the optical layer rerouting time is in the order of seconds or even minutes, and the electrical layer rerouting time is in the order of milliseconds, if the first electrical layer traffic affected by the first connection interruption can be rerouted temporarily and quickly, accordingly, the rerouting of the first optical layer traffic originally carrying the first power traffic can be performed synchronously or asynchronously in the background, and does not affect the first electrical layer traffic to preferentially obtain a temporary new route using the remaining capacity of the second optical layer traffic.
In the actual implementation process of the scheme, besides the case of successful rerouting of the first electrical-layer traffic, the case of failed rerouting of the first electrical-layer traffic is also encountered. The corresponding method further comprises: when the first electric layer service is rerouted, if the idle bandwidth of the existing other optical layer services is not enough to recover all the first electric layer services, the first electric layer service rerouting fails, and the first electric layer service is interrupted. The corresponding method process can be implemented by referring to fig. 3, and it can be known that "the remaining bandwidth of other optical layer paths is not enough to recover the first electrical layer service" of the process branch on the right side in fig. 3, from the expression of integrity, it should include the conclusion of "the rerouting of the first electrical layer service fails, the first electrical layer service is interrupted", then "setting the rerouting of the first electrical layer service to be locked" in fig. 3 is performed, and then the process enters "start optical layer service rerouting recovery service". If the first optical layer service can obtain a route by using other physical links in a normal state, the rerouting of the first optical layer service is successful, so that after the first connecting fiber is changed from a normal state to an interrupted state, the optical + electrical cooperation rerouting is completed, the optical layer service is recovered through rerouting, and the electrical layer service runs on the rerouting path of the original optical layer service and is recovered; as shown in the right branch of fig. 3, if the first optical layer service cannot obtain a route by using other physical links in a normal state, rerouting of the first optical layer service fails, and thus, after the first connection fiber is changed from a normal state to an interrupted state, optical + electrical cooperative rerouting is completed, the optical layer service cannot be rerouted due to the absence of an available physical link, and the optical layer service is interrupted at this time; and the electrical layer service fails to reroute because the optical layer service of the original service layer fails to reroute, and no other existing optical layer service exists or the idle bandwidth of other existing optical layer service is insufficient, and the electrical layer service is interrupted at the moment. In FIG. 3, the left-hand side technical branch is another representation of the method process 201 and 205 according to the embodiment of the present invention.
In the implementation mode of the embodiment of the invention, the first electrical layer service which has finished rerouting starts the return timing of the first electrical layer service if the first electrical layer service is a return type service; after the return time is reached, switching back the first electrical layer service which can be returned to the original optical layer service path from the rerouting path, and releasing the resources in the second optical layer service occupied by the rerouting path; and no switchback is made for the non-returning first electrical layer service. When the first connecting fiber is changed from a normal state to an interrupted state, the optical and electric cooperative rerouting is completed, and the optical layer service is recovered through the rerouting; the returnable electrical layer service runs on the rerouting path of the original optical layer service to be recovered; the non-return electrical layer service runs on the rerouting path of the second optical layer service to be recovered; the whole process not only utilizes the fastest recovery mode (electric layer priority rerouting recovery) to recover the service, but also ensures that optical layer and electric layer bandwidth resources occupied by rerouting are released as much as possible after the service is recovered.
In a specific implementation process, the operation of the switchback does not only relate to the electrical-layer service described above, but also relates to the optical-layer service, and therefore, in combination with the embodiments of the present invention, there is also provided a method for switching back the optical-layer service, as shown in fig. 4 and 5, detecting a physical link state, and if it is determined that the first optical-layer service is recovered from the interruption to a normal state, if the first optical-layer service also belongs to the switchback service, the method includes:
in step 301, it is determined whether a first optical layer service to be handed back to is loaded with an electrical layer service.
This is to avoid the abnormal termination of the electrical layer service carried by the first optical layer service when the first optical layer service is switched back. The electrical layer service can be the first electrical layer service which comprises the cut-back in the method, and can also comprise other newly generated electrical layer services.
In step 302, if the electrical layer service is carried on the first optical layer service to be back-cut, suspending the timing of returning the first optical layer service (if the optical layer service is directly back-cut, service interruption will be caused, so it is necessary to reroute the electrical layer service carried on the optical layer service to be back-cut to another optical layer service path first), and starting to reroute the electrical layer service carried on the first optical layer service to be back-cut; and setting the optical layer service to be switched back to as a rejection condition to calculate the electrical layer service rerouting path.
In step 303, if the electrical-layer traffic is successfully rerouted, the first optical-layer traffic is switched back to the corresponding path in the restored first connection fiber.
The above-mentioned step 301 plus 303 is correspondingly characterized as a specific execution process of "starting a first optical layer service rerouting to recover a service" in the right branch of fig. 5, and the technical idea is that, if the rerouted first optical layer service itself is in a return type (for example, when an original physical link of the first optical layer service needs to be recovered, a switch back to the original physical link is needed), an electrical layer service running on the first optical layer service (the electrical energy service here may include the above-mentioned first electrical layer service, and in addition, may include other electrical layer services newly added after the rerouting of the first optical layer service) needs to be rerouted outwards, so that a service running on an electrical layer thereof is prevented from being interrupted when the corresponding first optical layer service is handed back.
In fig. 5, it is determined whether the first fiber connection state, which is specifically referred to in the step "adopt different modes according to different states," is the first fiber connection interruption or the first fiber connection restoration is completed. Wherein, the left branch in fig. 5 is a further generalized outline of the contents of fig. 2-3, and the specific implementation contents of the internal processes thereof can be implemented by using the method processes of fig. 2 and 3; the right branch in fig. 5 is an overview of the method process of fig. 4, and the specific implementation content of the internal process thereof may be implemented by using the method process of fig. 4, which is not described herein again.
In view of the above-mentioned discussion, a specific implementation is also given in the embodiment of the present invention corresponding to the validation of the first optical-layer service and the first electrical-layer service on the first connection fiber, as shown in fig. 6, and the method includes:
in step 401, it is determined whether the optical layer service passes through the first connection fiber according to the original destination port of each hop in the optical layer service RouteDetail.
In step 402, for the optical layer service passing through the first optical fiber, a query instruction is issued to query the electrical layer service running on the corresponding optical layer service.
Wherein to further determine whether the first electrical-layer traffic and/or first optical-layer traffic is returnable, further:
in step 403, for the optical layer service and/or the electrical layer service passing through the first connection fiber, an inquiry command is issued to inquire the Return attribute and the Return time of the service.
Wherein, for the optical layer service and/or the electrical layer service with Return attribute being TRUE, it indicates the Return type service type. Correspondingly, after the first connection fiber is recovered, starting a timer of the first optical layer service, and when the time of the timer reaches the return time, issuing a switch-back command; and after the first optical layer service is recovered, starting a timer of the first electrical layer service, and issuing a switching-back command when the time of the timer reaches the switching-back time.
Accordingly, the implementation process and the specific implementation scenario for switching back the first optical layer service to the corresponding path in the recovered first optical fiber in step 303 are given, as shown in fig. 7, specifically including:
in step 501, the NMS-Control queries the CurrentRouteDetail of the current path of the service and the originateretatail of the original path, compares the CurrentRouteDetail with the originroutedetail, calculates the intersection to be deleted and added, and sends the intersection to the optical path Control device.
In step 502, the optical path Control device switches the path where the service runs to the original path after receiving the intersection issued by the NMS-Control.
Similar to the above method procedure explained by using a specific function interface, in the embodiment of the present invention, a corresponding implementation procedure of the method at the function interface level is provided corresponding to the step 203 of retrieving a route by using the remaining capacity of the other existing optical layer services, as shown in fig. 8, including:
in step 601, the SDN controller sends a query instruction to the NMS-Control, queries the optical layer service already existing in the current network, and filters out the second optical layer service that does not pass through the fiber break point according to RouteDetail in the query result.
In step 602, the remaining bandwidth of the second optical layer service is queried, after receiving the query command, the NMS-Control invokes a CalBandWidth interface to calculate the remaining bandwidth, where the interface obtains a total bandwidth according to a ServiceType attribute of the current optical layer service, invokes a queryclentservice to obtain a loaded client layer service, and calculates bandwidths occupied by all client layer services, where the total bandwidth-bandwidth occupied by the client layer is the remaining bandwidth of the optical layer service.
In step 603, the SDN controller sends an inquiry command to the NMS-Control to inquire about the total bandwidth of the electrical layer service to be rerouted. And the NMS-Control acquires the bandwidth of the single electric layer service according to the ServiceType of each electric layer service, and the total bandwidth of the electric layer services to be rerouted is obtained by adding the bandwidths of all the electric layer services.
Example 2:
fig. 9 is a schematic structural diagram of an optoelectronic multi-layer rerouting protection coordination apparatus according to an embodiment of the present invention. The optoelectronic multi-layer rerouting protection coordination apparatus of the present embodiment includes one or more processors 21 and a memory 22. In fig. 9, one processor 21 is taken as an example.
The processor 21 and the memory 22 may be connected by a bus or other means, and the bus connection is exemplified in fig. 9.
The memory 22, which is a non-volatile computer-readable storage medium, may be used to store a non-volatile software program and a non-volatile computer-executable program, such as the optoelectronic multi-layer rerouting protection coordination method in embodiment 1. The processor 21 executes the electro-optical multi-layer rerouting protection coordination method by executing a non-volatile software program and instructions stored in the memory 22.
The memory 22 may include high speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, the memory 22 may optionally include a memory located remotely from the processor 21, which may be connected to the processor 21 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The program instructions/modules are stored in the memory 22, and when executed by the one or more processors 21, perform the optical electrical multi-layer rerouting protection coordination method in the above embodiment 1, for example, perform the above-described steps shown in fig. 1 to 8.
It should be noted that, for the information interaction, execution process and other contents between the modules and units in the apparatus and system, the specific contents may refer to the description in the embodiment of the method of the present invention because the same concept is used as the embodiment of the processing method of the present invention, and are not described herein again.
Those of ordinary skill in the art will appreciate that all or part of the steps of the various methods of the embodiments may be implemented by associated hardware as instructed by a program, which may be stored on a computer-readable storage medium, which may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An optoelectronic multi-layer rerouting protection coordination method, detecting a physical link state, and determining that a first optical fiber changes from a normal state to an interrupted state, wherein a first optical-layer service runs on the first optical fiber, and a first electrical-layer service runs on the first optical-layer service, the method comprising:
setting a first optical layer service rerouting state so as to prohibit the first optical layer service rerouting;
setting a first optical layer service affected by first fiber connection interruption as a rejection condition, and performing first electrical layer service rerouting path calculation to avoid finding the first optical layer service again when the first electrical layer service is rerouted;
and if the first electrical-layer service can obtain a route again by utilizing the residual capacity of other existing second optical-layer services, switching the first electrical-layer service to a rerouting path formed by the residual capacity of the second optical-layer service, thereby recovering the first electrical-layer service.
2. The optoelectronic multi-layer rerouting protection coordination method according to claim 1, characterized in that after recovering the first electrical-layer traffic, the method further comprises:
unlocking the first optical layer service with the rerouting locking state, and starting rerouting of the first optical layer service;
if the first optical layer service can obtain a route by using other physical links in normal states, the rerouting of the first optical layer service is successful, and the first optical layer service is switched to a rerouting path to recover the first optical layer service.
3. The optoelectronic multi-layer rerouting protection coordination method according to claim 1, characterized in that said method further comprises:
when the first electric layer service is rerouted, if the idle bandwidth of the existing other optical layer services is not enough to recover all the first electric layer services, the first electric layer service rerouting fails, and the first electric layer service is interrupted.
4. The optoelectronic multi-layer rerouting protection coordination method according to claim 3, wherein the first optical layer service runs on the first connection fiber, and the confirmation process that the first electrical layer service runs on the first optical layer service includes:
judging whether the optical layer service passes through a first connection fiber or not according to the original port of each hop in the optical layer service RouteDetail;
and for the optical layer service passing through the first optical fiber, issuing a query instruction to query the electrical layer service running on the corresponding optical layer service.
5. The optoelectronic multi-layer rerouting protection coordination method according to claim 2, wherein after the first optical layer traffic is successfully rerouted, the rejection condition of the first optical layer traffic is removed, and the method further comprises:
if the first electrical-layer service which has finished rerouting is a returning type service, starting the returning timing of the first electrical-layer service after the successful rerouting of the first electrical-layer service is confirmed; and after the return time is reached, switching back the returnable first electrical-layer service from the rerouting path to the original optical-layer service path, and releasing resources in the second optical-layer service occupied by the rerouting path.
6. The optoelectronic multi-layer rerouting protection coordination method according to claim 5, characterized in that the method comprises:
for the optical layer service passing through the first connecting fiber, issuing a query instruction, and querying Return attribute and Return time of the corresponding electrical layer service;
wherein, for the traffic whose Return attribute is TRUE, it is the Return electrical layer traffic.
7. The optoelectronic multi-layer rerouting protection coordination method according to claim 5, wherein after the return time, switching back is started, and for the returnable first electrical-layer service, switching back from the rerouting path to the original optical-layer service path, and releasing the second optical-layer service resource occupied by the rerouting path, specifically includes:
inquiring CurrentRouteDetail of a current path of the first optical layer service and OriginalRouteDetail of an original path, comparing the CurrentRouteDetail with the OriginalRouteDetail, and calculating optical routing nodes needing to be deleted and/or added;
and according to the optical routing nodes which are deleted and/or added as required, switching the service running path to the original path.
8. The optoelectronic multi-layer rerouting protection coordination method according to claim 5, wherein the physical link status is detected, and when it is determined that the first connection fiber is recovered from the interruption to the normal status, if the first optical layer service belongs to the returnable service, the method further comprises:
confirming whether a first optical layer service to be cut back is loaded with an electrical layer service;
if the first optical layer service to be back-cut bears the electrical layer service, suspending the timing of the return of the first optical layer service, and starting to reroute the electrical layer service borne on the first optical layer service to be back-cut; setting the optical layer service to be cut back as a rejection condition to calculate the electrical layer service rerouting path;
and if the electrical-layer service is successfully rerouted, switching back the first optical-layer service to the corresponding path in the recovered first connection fiber.
9. The optoelectronic multi-layer rerouting protection coordination method according to claim 1, wherein said switching the first electrical-layer traffic to the rerouting path formed by the remaining capacity of the second optical-layer traffic specifically comprises:
inquiring the optical layer service existing in the current network, and filtering out a second optical layer service which does not pass through a fiber breaking point according to RouteDetail in an inquiry result;
querying the residual bandwidth of the second optical layer service, wherein the process of querying the residual bandwidth of the second optical layer service comprises calling a CalBandWidth interface and calculating the residual bandwidth; the CalBandWidth interface acquires the total bandwidth according to the ServiceType attribute of the current optical layer service, calls QueryClientServicie to acquire the loaded client layer service and calculates the bandwidth occupied by all the client layer services, wherein the total bandwidth-the bandwidth occupied by the client layer is the residual bandwidth of the optical layer service;
and obtaining the bandwidth of a single electric layer service according to the ServiceType of each electric layer service, and adding all the electric layer service bandwidths to obtain the total bandwidth of the electric layer service to be rerouted.
10. An optoelectronic multi-layer rerouting protection coordination device, comprising:
at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor for performing the optoelectronic multi-layer reroute protection coordination method of any one of claims 1-9.
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