CN109962812B - Electrical layer discrete service back calculation method and system - Google Patents
Electrical layer discrete service back calculation method and system Download PDFInfo
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- CN109962812B CN109962812B CN201910161360.2A CN201910161360A CN109962812B CN 109962812 B CN109962812 B CN 109962812B CN 201910161360 A CN201910161360 A CN 201910161360A CN 109962812 B CN109962812 B CN 109962812B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
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Abstract
The invention discloses a method and a system for back calculation of electrical layer discrete services, and relates to the technical field of communication transmission networks. The method comprises the steps of splitting a discrete service and a single-station service into a plurality of discrete nodes according to network elements, selecting one discrete node as an initial discrete node and starting inverse calculation; finding out an output port, a service layer port and a service layer business object according to the input port of the discrete node network element; finding a host network element port according to the service layer service object, and finding a client layer port according to the host network element port; finding out a discrete node network element and an output port of the discrete node network element according to the client layer port of the host network element until a discrete service end point, and splicing the discrete nodes obtained by inverse calculation into an end-to-end service. When the engineering service is cut over, the operation of deleting the whole amount of the service and then reconstructing the service is not required to be executed, only the single-station service of the adjusting station is required to be added, and the operation flow of the cut over of the engineering service is greatly simplified.
Description
Technical Field
The invention relates to the technical field of communication transmission networks, in particular to a method and a system for back calculation of electrical layer discrete services.
Background
In a communication transmission network system, due to equipment upgrade or equipment failure, it is often necessary to adjust the existing network services, such as adding/deleting relay stations, replacing single disks, and the like. The system maintenance personnel must first deactivate and delete all services passing through the adjusted site, then perform operations such as adding and deleting single disks, connecting fibers and the like of the site, and then sequentially recreate and activate the adjusted services.
Because the current network environment is usually very complex, the associated services are more, the operation flow of deleting and rebuilding the total amount of the services is too long, the efficiency of adjusting the services is extremely low, and system maintenance personnel are easy to operate by mistake, which causes unpredictable consequences that the current network services can not be recovered for a long time, and the like.
Disclosure of Invention
The invention aims to overcome the defects of the background technology and provide a method and a system for back calculation of electrical layer discrete services, wherein the full deletion and reconstruction operation of services is not required to be executed during the cutover of engineering services, so that the operation flow of the cutover of the engineering services is greatly simplified.
The invention provides a back calculation method for electrical layer discrete services, which comprises the following steps:
splitting the discrete service and the single-station service into a plurality of discrete nodes according to the network element, and selecting one discrete node as an initial discrete node to start back calculation;
finding out an output port, a service layer port and a service layer business object according to the input port of the discrete node network element;
finding a host network element port according to the service layer service object, and finding a client layer port according to the host network element port;
finding out a discrete node network element and an output port of the discrete node network element according to the client layer port of the host network element until a discrete service end point, and splicing the discrete nodes obtained by inverse calculation into an end-to-end service.
On the basis of the scheme, the method also comprises the following steps that when one discrete node is selected as an initial discrete node to start back calculation, a source and destination discrete node of the end-to-end service is selected as the initial discrete node to perform back calculation in one direction;
or selecting an intermediate node of the end-to-end service as an initial discrete node, performing back calculation in two directions, and splicing two back calculation results into a final back calculation result.
On the basis of the above scheme, finding an egress port, a service layer port, and a service layer service object according to an ingress port of a discrete node network element specifically includes the following steps:
finding a service layer port according to the network element output port, and finding a service layer service object according to the service layer port;
if the service layer object does not exist, continuously searching a service layer service port and a service layer service object according to the service layer port until reaching an OCH layer; if the service layer object is not found in the OCH layer, the service back calculation fails;
if the service layer business object is found, the back calculation is continued.
On the basis of the above scheme, finding a port of a host network element according to a service layer service object and finding a port of a client layer according to a port of the host network element specifically includes the following steps:
for the ODU layer port and the client layer port, the service layer port is the same as the client layer port; for an ODU layer port, a client layer port time slot of a source network element is firstly acquired, and a client layer port of a host network element is acquired according to the client layer port time slot of the source network element and a service layer port of the host network element.
On the basis of the above scheme, the finding of the discrete node network element and the output port of the discrete node network element according to the client port of the host network element until the discrete service end point, and splicing the discrete nodes obtained by inverse calculation into an end-to-end service specifically includes the following steps:
finding a discrete node according to a client layer port of a host network element, and acquiring an output port of a network element of the discrete node;
judging whether the output port is the service end point of the layer; if the service destination is not the service destination of the layer, splicing the next discrete node of the layer until the service destination of the layer; if the service is the end point of the layer, continuing splicing according to the client layer service of the layer until the end point of the discrete service, and splicing the discrete nodes obtained by inverse calculation into an end-to-end service.
The invention also provides a system for inverse calculation of electrical layer discrete services, which comprises:
a splitting module to: splitting the discrete service and the single station service into a plurality of discrete nodes according to network elements;
a back-calculation module to: selecting a discrete node as an initial discrete node to start inverse calculation, and finding out an output port, a service layer port and a service layer business object according to a network element input port of the discrete node; finding a host network element port according to the service layer service object, and finding a client layer port according to the host network element port; finding out a discrete node network element and an output port of the discrete node network element according to the client layer port of the host network element until a discrete service end point, and splicing the discrete nodes obtained by inverse calculation into an end-to-end service.
On the basis of the scheme, the back calculation module is further used for: when a discrete node is selected as an initial discrete node to start back calculation, a source-destination discrete node of an end-to-end service is selected as the initial discrete node to perform back calculation in one direction;
or selecting an intermediate node of the end-to-end service as an initial discrete node, performing back calculation in two directions, and splicing two back calculation results into a final back calculation result.
On the basis of the above scheme, the back calculation module finds out an output port, a service layer port and a service layer service object according to a discrete node network element input port, and specifically includes the following steps:
finding a service layer port according to the network element output port, and finding a service layer service object according to the service layer port;
if the service layer object does not exist, continuously searching a service layer service port and a service layer service object according to the service layer port until reaching an OCH layer; if the service layer object is not found in the OCH layer, the service back calculation fails;
if the service layer business object is found, the back calculation is continued.
On the basis of the above scheme, the back calculation module finds a port of a host network element according to a service layer service object, and finds a port of a client layer according to the port of the host network element, and specifically includes the following steps:
for the ODU layer port and the client layer port, the service layer port is the same as the client layer port; for an ODU layer port, a client layer port time slot of a source network element is firstly acquired, and a client layer port of a host network element is acquired according to the client layer port time slot of the source network element and a service layer port of the host network element.
On the basis of the above scheme, the back calculation module finds the discrete node network element and the output port of the discrete node network element according to the client layer port of the host network element until the discrete service end point, and splices the discrete nodes obtained by back calculation into an end-to-end service, specifically comprising the following steps:
finding a discrete node according to a client layer port of a host network element, and acquiring an output port of a network element of the discrete node;
judging whether the output port is the service end point of the layer; if the service destination is not the service destination of the layer, splicing the next discrete node of the layer until the service destination of the layer; if the service is the end point of the layer, continuing splicing according to the client layer service of the layer until the end point of the discrete service, and splicing the discrete nodes obtained by inverse calculation into an end-to-end service.
Compared with the prior art, the invention has the following advantages:
the invention firstly splits the discrete service and the single station service into a plurality of discrete nodes, then recombines and splices the discrete nodes into the complete end-to-end service, does not need to execute the full deletion of the service and then rebuild operation when the engineering service is cut over, only needs to add the single station service of the adjusting station, and greatly simplifies the operation flow of the cut over of the engineering service.
Drawings
FIG. 1 is a diagram of a discrete business abstraction model according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for inverse calculation of electrical layer discrete services according to an embodiment of the present invention;
FIG. 3 is a diagram of an unprotected electrical layer discrete services layering model of an embodiment of the present invention;
FIG. 4 is a diagram of a protected electrical layer discrete services layering model according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings. While the invention will be described in conjunction with the specific embodiments, it will be understood that they are not intended to limit the invention to the embodiments described. On the contrary, it is intended to cover alternatives, modifications, and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims. It should be noted that the method steps described herein may be implemented by any functional block or functional arrangement, and that any functional block or functional arrangement may be implemented as a physical entity or a logical entity, or a combination of both.
In order that those skilled in the art will better understand the present invention, the following detailed description of the invention is provided in conjunction with the accompanying drawings and the detailed description of the invention.
Note that: the example to be described next is only a specific example, and does not limit the embodiments of the present invention necessarily to the following specific steps, values, conditions, data, orders, and the like. Those skilled in the art can, upon reading this specification, utilize the concepts of the present invention to construct more embodiments than those specifically described herein.
Each discrete service can be split into a plurality of discrete nodes according to the network element, each discrete node identifies an ingress port and an egress port (there is also a possibility that only the ingress port or the egress port) in a single network element, and each single station service can also be represented by a discrete node model. A discrete node is the smallest irrevocable unit of discrete traffic. The discrete service reverse calculation is a process of splitting the discrete service and the single station service into a plurality of discrete nodes, and then recombining and splicing the discrete nodes into a complete end-to-end service.
As shown in fig. 1, the discrete services [ a-F ] may be split into discrete node network elements 1[ a-B ], network elements 3[ E-F ], and the network element 2 single site service may be represented as a discrete node network element 2[ C-D ].
Referring to fig. 2, an embodiment of the present invention provides an electrical-layer discrete service back-calculation method, including the following steps:
s10: and splitting the discrete service and the single-station service into a plurality of discrete nodes according to the network element, and selecting one discrete node as an initial discrete node to start inverse calculation. The initial discrete node preferentially selects the source and destination discrete nodes of the end-to-end service, because the source and destination discrete nodes only need to be spliced in one direction, if the intermediate discrete node is the intermediate discrete node, the source and destination discrete nodes need to be spliced in two directions at the same time, and then the splicing result is merged into the end-to-end service;
s20: and finding out an output port according to an input port in the discrete node network element, wherein if the discrete node has only one port, the input port and the output port are the same port. Finding out service layer service port P2 according to network element internal output port P1, finding out service layer service object according to service layer port P2, if service layer object does not exist, then continuing to find out service layer service port and service layer service object according to port P2 until OCH (Optical CHannel sub-layer network). Since the electrical layer service must rely on the OCH layer, if the OCH layer service object does not exist, the electrical layer service back calculation fails.
S30: and finding the port of the host network element according to the service layer object, and finding the port of the client layer according to the port of the host network element. For ODUK(k represents different cell particles, k may be 0, 1, 2, 3, 4, such as ODU1, ODU2, etc.), a client layer, where a service layer port is the same as a client layer port, and others need to first acquire a client layer port timeslot of a source network element and acquire the client layer port according to the timeslot and a service layer port of a sink network element.
S40: finding out a discrete node according to a client layer port of a host network element, acquiring an output port in a discrete node network element, and judging whether the port is a service end point of the layer; if the node is not the service end point of the layer, jumping to step S20, splicing the next discrete node until the service end point of the layer; if the service end point is the service end point of the layer, the step S30 is skipped to splice the service of the client layer until the service level of the initial discrete node, and the discrete nodes obtained by inverse calculation are spliced into an end-to-end service.
Fig. 3 shows that the unprotected electrical layer discrete service model deletes the branch line disk of the network element 2, and triggers end-to-end service discrete of the client and the ODU 2. Adding a new branch circuit disk and a new connecting fiber in the network element 2, creating a single station electrical layer service on the branch circuit disk, performing optical layer end-to-end service back calculation, and selecting a discrete customer service for back calculation, wherein the back calculation process comprises the following steps:
(1) discrete customer service can generate a discrete node network element 1[ A ];
(2) acquiring a service port B of a service layer by acquiring an output port A in the network element according to the discrete node network element 1[ A- - ], and acquiring a discrete node network element 1[ B- -C ] according to the condition that a service object cannot be found by the port B;
(3) acquiring a service layer service port D according to a network element internal output port C of the discrete node network element 1[ B-C ], acquiring a service layer object of the port D, and finding an opposite end network element port E;
(4) according to the time slot of the port D occupied by the port C and the port E, a client layer port F and a discrete node network element 2[ F-G ] can be obtained, the port G can be judged to be an ODU2 service end point, ODU2 path finding is completed, and the ODU2 path finding comprises a discrete node network element 1[ B-C ] and a discrete node network element 2[ F-G ];
(5) according to the output port G in the discrete node network element 2[ F-G ] network element, the client layer port H can be obtained, the discrete node network element 2 < -H > of the port H can be obtained, and the port H is the client service end point, the client service routing is completed and comprises the discrete node network element 1[ A < - > and the discrete node network element 2 < -H >.
As shown in fig. 4, the protective electrical layer discrete service model deletes a branch line disk of the network element 2, and triggers end-to-end service discretization of the client and the ODU2 (an ODU sublayer network, an optical path data unit sublayer network) and the ODU 3. Adding a new branch circuit disk and a new connecting fiber in the network element 2, creating a single station electrical layer service on the branch circuit disk, performing optical layer end-to-end service back calculation, and selecting a discrete customer service for back calculation, wherein the back calculation process comprises the following steps:
(1) discrete customer service can generate a discrete node network element 1[ A ];
(2) acquiring a service layer service port B from an output port A in the network element according to the discrete node network element 1[ A- - ], acquiring a discrete node network element 1[ B- -C ] according to the fact that a service object cannot be found by the port B, and acquiring a protection discrete node network element 1[ K- -L ] (the protection discrete node is processed after splicing of working paths) of the discrete node network element 1[ B- -C ];
(3) finding a service layer service port D according to an output port C in a network element of the discrete node network element 1[ B-C ], and obtaining the discrete node network element 1[ D- ] according to the condition that a service object cannot be found by the port D;
(4) according to the network element internal output port D of the discrete node network element 1[ D- - ], a service layer service port E is found, a service object of the port E can be obtained, and an opposite end network element port F is found;
(5) according to the time slot and the port F of the port E of the service layer occupied by the port D, a client layer port G and a discrete node network element 2 < -G > can be obtained, the port G is a service destination, ODU3 path finding is completed, and the ODU3 path finding comprises a discrete node network element 1 < -D > and a discrete node network element 2 < -G >;
(6) according to the time slot and the port G of the service layer port D occupied by the port C, a client layer port H and a discrete node network element 2[ H-I ] can be obtained, the output port I of the discrete node network element is a service destination, and the work ODU2 completes routing, wherein the work ODU2 comprises discrete node network elements 1[ B-C ] and discrete node network elements 2[ H-I ];
(7) and searching for a protection path (recursive call and consistent with a working path searching method) according to the discrete node network element 1[ K-L ], so that the discrete node network element 2[ M-N ] can be found, and the path searching of the protection ODU2 is completed when the output port N of the discrete node network element is a service destination. For a protection path, a working protection relationship of a host discrete node needs to be checked, a working discrete node network element 2[ H-I ] and a working discrete node network element 1[ B-C ] of a protection discrete node network element 1[ K-L ] can be in the same ODU service through the protection discrete node network element 2[ M-N ], and a successful end-to-end service { network element 1[ B-C ] - -discrete node network element 2[ H-I ] } and { network element 1[ K-L ] - -network element 2[ M-N ] } are in a working protection relationship;
(8) according to the internal output port I of the discrete node network element 2[ H-I ] network element, a client layer service port J can be obtained, and a discrete node network element 2 < -J > is obtained, wherein the port J is a client service destination, and the client service routing is completed and comprises a discrete node network element 1[ A < - > and a discrete node network element 2 < -J >.
The embodiment of the invention also provides a system for inverse calculation of electrical layer discrete services, which comprises:
a splitting module to: splitting the discrete service and the single station service into a plurality of discrete nodes according to network elements;
a back-calculation module to: selecting a discrete node as an initial discrete node to start inverse calculation, and finding out an output port, a service layer port and a service layer business object according to a network element input port of the discrete node; finding a host network element port according to the service layer service object, and finding a client layer port according to the host network element port; finding out a discrete node network element and an output port of the discrete node network element according to the client layer port of the host network element until a discrete service end point, and splicing the discrete nodes obtained by inverse calculation into an end-to-end service.
As a preferred embodiment, the back-calculation module is further configured to: when a discrete node is selected as an initial discrete node to start back calculation, a source-destination discrete node of an end-to-end service is selected as the initial discrete node to perform back calculation in one direction;
or selecting an intermediate node of the end-to-end service as an initial discrete node, performing back calculation in two directions, and splicing two back calculation results into a final back calculation result.
As a preferred embodiment, the back-calculation module finds an egress port, a service layer port, and a service layer service object according to an ingress port of a discrete node network element, and specifically includes the following steps:
finding a service layer port according to the network element output port, and finding a service layer service object according to the service layer port;
if the service layer object does not exist, continuously searching a service layer service port and a service layer service object according to the service layer port until reaching an OCH layer; if the service layer object is not found in the OCH layer, the service back calculation fails;
if the service layer business object is found, the back calculation is continued.
As a preferred embodiment, the back-calculation module finds a port of a host network element according to a service layer service object, and finds a port of a client layer according to the port of the host network element, and specifically includes the following steps:
for the ODU layer port and the client layer port, the service layer port is the same as the client layer port; for an ODU layer port, a client layer port time slot of a source network element is firstly acquired, and a client layer port of a host network element is acquired according to the client layer port time slot of the source network element and a service layer port of the host network element.
As a preferred embodiment, the back calculation module finds a discrete node network element and a discrete node network element output port according to a host network element client port until a discrete service end point, and splices discrete nodes obtained by back calculation into an end-to-end service, specifically including the following steps:
finding a discrete node according to a client layer port of a host network element, and acquiring an output port of a network element of the discrete node;
judging whether the output port is the service end point of the layer; if the service destination is not the service destination of the layer, splicing the next discrete node of the layer until the service destination of the layer; if the service is the end point of the layer, continuing splicing according to the client layer service of the layer until the end point of the discrete service, and splicing the discrete nodes obtained by inverse calculation into an end-to-end service.
Note that: the above-described embodiments are merely examples and are not intended to be limiting, and those skilled in the art can combine and combine some steps and devices from the above-described separately embodiments to achieve the effects of the present invention according to the concept of the present invention, and such combined and combined embodiments are also included in the present invention, and such combined and combined embodiments are not described herein separately.
Advantages, effects, and the like, which are mentioned in the embodiments of the present invention, are only examples and are not limiting, and they cannot be considered as necessarily possessed by the various embodiments of the present invention. Furthermore, the foregoing specific details disclosed herein are merely for purposes of example and for purposes of clarity of understanding, and are not intended to limit the embodiments of the invention to the particular details which may be employed to practice the embodiments of the invention.
The block diagrams of devices, apparatuses, systems involved in the embodiments of the present invention are only given as illustrative examples, and are not intended to require or imply that the connections, arrangements, configurations, etc. must be made in the manner shown in the block diagrams. These devices, apparatuses, devices, systems may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including, but not limited to," and are used interchangeably therewith. As used in connection with embodiments of the present invention, the terms "or" and "refer to the term" and/or "and are used interchangeably herein unless the context clearly dictates otherwise. The word "such as" is used in connection with embodiments of the present invention to mean, and is used interchangeably with, the word "such as but not limited to".
The flow charts of steps in the embodiments of the present invention and the above description of the methods are merely illustrative examples and are not intended to require or imply that the steps of the various embodiments must be performed in the order presented. As will be appreciated by those skilled in the art, the order of the steps in the above embodiments may be performed in any order. Words such as "thereafter," "then," "next," etc. are not intended to limit the order of the steps; these words are only used to guide the reader through the description of these methods. Furthermore, any reference to an element in the singular, for example, using the articles "a," "an," or "the" is not to be construed as limiting the element to the singular.
In addition, the steps and devices in the embodiments of the present invention are not limited to be implemented in a certain embodiment, and in fact, some steps and devices in the embodiments of the present invention may be combined according to the concept of the present invention to conceive new embodiments, and these new embodiments are also included in the scope of the present invention.
The respective operations in the embodiments of the present invention may be performed by any appropriate means capable of performing the corresponding functions. The means may comprise various hardware and/or software components and/or modules, including, but not limited to, a hardware Circuit, an ASIC (Application Specific Integrated Circuit), or a processor.
In practical applications, the various illustrated Logic blocks, modules and circuits may be implemented using a general purpose Processor, a DSP (Digital Signal Processor), an ASIC, an FPGA (Field Programmable Gate Array) or CPLD (Complex Programmable Logic Device), discrete Gate or transistor Logic, discrete hardware components or any combination thereof designed to perform the functions described above. Wherein a general purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may reside in any form of tangible storage medium. Some examples of storage media that can be used include RAM (Random Access Memory), ROM (Read-Only Memory), flash Memory, EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically-Erasable Programmable Read-Only Memory), registers, hard disk, removable disk, CD-ROM (Compact Disc Read-Only Memory), and the like. A storage medium may be coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. A software module may be a single instruction, or many instructions, and may be distributed over several different code segments, among different programs, and across multiple storage media.
The method of an embodiment of the invention includes one or more acts for implementing the method described above. The methods and/or acts may be interchanged with one another without departing from the scope of the claims. In other words, unless a specific order of actions is specified, the order and/or use of specific actions may be modified without departing from the scope of the claims.
The functions in the embodiments of the present invention may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored as one or more instructions on a tangible computer-readable medium. A storage media may be any available tangible media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other tangible medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. As used herein, disk (disk) and Disc (Disc) include Compact Disc (CD), laser Disc, optical Disc, DVD (Digital Versatile Disc), floppy disk and blu-ray Disc where disks reproduce data magnetically, while discs reproduce data optically with lasers.
Accordingly, a computer program product may perform the operations presented herein. For example, such a computer program product may be a computer-readable tangible medium having instructions stored (and/or encoded) thereon that are executable by one or more processors to perform the operations described herein. The computer program product may include packaged material.
Software or instructions in embodiments of the present invention may also be transmitted over a transmission medium. For example, the software may be transmitted from a website, server, or other remote source using a transmission medium such as coaxial cable, fiber optic cable, twisted pair, DSL (Digital Subscriber Line), or wireless technologies such as infrared, radio, or microwave.
Further, modules and/or other suitable means for implementing the methods and techniques of embodiments of the present invention may be downloaded and/or otherwise obtained by a user terminal and/or base station as appropriate. For example, such a device may be coupled to a server to facilitate the transfer of means for performing the methods described herein. Alternatively, the various methods described herein can be provided via storage means (e.g., RAM, ROM, a physical storage medium such as a CD or floppy disk) so that the user terminal and/or base station can obtain the various methods when coupled to or providing storage means to the device. Further, any other suitable technique for providing the methods and techniques described herein to a device may be utilized.
Other examples and implementations are within the scope and spirit of the embodiments of the invention and the following claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard-wired, or any combination of these. Features implementing functions may also be physically located at various locations, including being distributed such that portions of functions are implemented at different physical locations. Also, as used herein, including in the claims, "or" as used in a list of items beginning with "at least one" indicates a separate list, such that a list of "A, B or at least one of C" means a or B or C, or AB or AC or BC, or ABC (i.e., a and B and C). Furthermore, the word "exemplary" does not mean that the described example is preferred or better than other examples.
Various changes, substitutions and alterations to the techniques described herein may be made by those skilled in the art without departing from the techniques of the teachings as defined by the appended claims. Moreover, the scope of the claims of the present disclosure is not limited to the particular aspects of the process, machine, manufacture, composition of matter, means, methods and acts described above. Processes, machines, manufacture, compositions of matter, means, methods, or acts, presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding aspects described herein may be utilized. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or acts.
The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit embodiments of the invention to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.
Claims (4)
1. An electrical layer discrete business back calculation method is characterized by comprising the following steps:
splitting the discrete service and the single-station service into a plurality of discrete nodes according to the network element, and selecting one discrete node as an initial discrete node to start back calculation;
finding out an output port, a service layer port and a service layer business object according to the input port of the discrete node network element;
finding a host network element port according to the service layer service object, and finding a client layer port according to the host network element port;
finding out a discrete node network element and an output port of the discrete node network element according to a client port of a host network element until a discrete service end point, and splicing discrete nodes obtained by inverse calculation into an end-to-end service;
the finding of the exit port, the service layer port and the service layer service object according to the discrete node network element entry port specifically comprises the following steps:
finding a service layer port according to the network element output port, and finding a service layer service object according to the service layer port;
if the service layer service object does not exist, continuously searching the service layer service port and the service layer service object according to the service layer port until reaching an OCH (Optical CHannel) layer; if the service layer service object is not found in the OCH layer, the service back calculation fails;
if the service layer business object is found, continuing to perform back calculation;
the finding of the port of the host network element according to the service layer service object and the finding of the port of the client layer according to the port of the host network element specifically include the following steps:
for the ODU layer port and the client layer port, the service layer port is the same as the client layer port; for an Optical channel Data Unit (ODU) layer port, first acquiring a client layer port time slot of a source network element, and acquiring a client layer port of a sink network element according to the client layer port time slot of the source network element and a service layer port of the sink network element;
the method comprises the following steps of finding a discrete node network element and a discrete node network element output port according to a host network element client layer port until a discrete service end point, and splicing discrete nodes obtained by inverse calculation into an end-to-end service, wherein the method specifically comprises the following steps:
finding a discrete node according to a client layer port of a host network element, and acquiring an output port of a network element of the discrete node;
judging whether the output port is the service end point of the layer; if the service destination is not the service destination of the layer, splicing the next discrete node of the layer until the service destination of the layer; if the service is the end point of the layer, continuing splicing according to the client layer service of the layer until the end point of the discrete service, and splicing the discrete nodes obtained by inverse calculation into an end-to-end service.
2. The method of claim 1, wherein: when a discrete node is selected as an initial discrete node to start back calculation, a source-host discrete node of an end-to-end service is selected as the initial discrete node to perform back calculation in one direction;
or selecting an intermediate node of the end-to-end service as an initial discrete node, performing back calculation in two directions, and splicing two back calculation results into a final back calculation result.
3. An electrical-layer discrete business recalculation system, comprising:
a splitting module to: splitting the discrete service and the single station service into a plurality of discrete nodes according to network elements;
a back-calculation module to: selecting a discrete node as an initial discrete node to start inverse calculation, and finding out an output port, a service layer port and a service layer business object according to a network element input port of the discrete node; finding a host network element port according to the service layer service object, and finding a client layer port according to the host network element port; finding out a discrete node network element and an output port of the discrete node network element according to a client port of a host network element until a discrete service end point, and splicing discrete nodes obtained by inverse calculation into an end-to-end service;
the back calculation module finds out an output port, a service layer port and a service layer service object according to the discrete node network element input port, and specifically comprises the following steps:
finding a service layer port according to the network element output port, and finding a service layer service object according to the service layer port;
if the service layer service object does not exist, continuously searching a service layer service port and a service layer service object according to the service layer port until reaching the OCH layer; if the service layer service object is not found in the OCH layer, the service back calculation fails;
if the service layer business object is found, continuing to perform back calculation;
the back-calculation module finds the port of the host network element according to the service object of the service layer and finds the port of the client layer according to the port of the host network element, and specifically comprises the following steps:
for the ODU layer port and the client layer port, the service layer port is the same as the client layer port; for an ODU layer port, firstly, acquiring a client layer port time slot of a source network element, and acquiring a client layer port of a host network element according to the client layer port time slot of the source network element and a service layer port of the host network element;
the back calculation module finds the discrete node network element and the output port of the discrete node network element according to the client port of the host network element until the discrete service end point, and splices the discrete nodes obtained by back calculation into an end-to-end service, and specifically comprises the following steps:
finding a discrete node according to a client layer port of a host network element, and acquiring an output port of a network element of the discrete node;
judging whether the output port is the service end point of the layer; if the service destination is not the service destination of the layer, splicing the next discrete node of the layer until the service destination of the layer; if the service is the end point of the layer, continuing splicing according to the client layer service of the layer until the end point of the discrete service, and splicing the discrete nodes obtained by inverse calculation into an end-to-end service.
4. The system of claim 3, wherein: the back calculation module is further configured to: when a discrete node is selected as an initial discrete node to start back calculation, a source-destination discrete node of an end-to-end service is selected as the initial discrete node to perform back calculation in one direction;
or selecting an intermediate node of the end-to-end service as an initial discrete node, performing back calculation in two directions, and splicing two back calculation results into a final back calculation result.
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