CN113676344A - Network virtualization method and device for heterogeneous optical network, electronic equipment and storage medium - Google Patents
Network virtualization method and device for heterogeneous optical network, electronic equipment and storage medium Download PDFInfo
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Abstract
The embodiment of the application provides a network virtualization method and device for a heterogeneous optical network, an electronic device and a storage medium, wherein the method comprises the following steps: converting the heterogeneous optical network into a virtual network with uniform wavelength resources through preset network virtualization operation, wherein the heterogeneous optical network at least comprises networking based on two different network communication technologies; and realizing end-to-end communication between the networks of the two different network communication technologies based on the virtual network with unified wavelength resources. The method and the device can simplify the end-to-end communication flow in the heterogeneous optical network and have compatibility with the heterogeneous optical network. The present application may be applicable to heterogeneous multi-dimensional optical networks including WDM, EON, and SDM-EON.
Description
Technical Field
The present application relates to the field of optical networks, and in particular, to a network virtualization method and apparatus, an electronic device, and a storage medium for a heterogeneous optical network.
Background
In networks with different technical architectures, the resource forms and constraints are different, and in order to get rid of the situation of complex resource scheduling caused by multiple network technologies in heterogeneous networks, the optical network virtualization technology is widely researched.
The virtualization schemes in the related art are dedicated virtualization schemes proposed for specific technologies, but these virtualization schemes are not compatible with heterogeneous networks.
Aiming at the problems of complex end-to-end communication scheduling and incompatible virtualization of the heterogeneous optical network in the related art, no effective solution is provided at present.
Disclosure of Invention
Aiming at the problems in the prior art, the application provides a network virtualization method and device for a heterogeneous optical network, electronic equipment and a storage medium, which can solve the problems of complex end-to-end communication scheduling and virtualization incompatibility of the heterogeneous optical network.
In order to solve at least one of the above problems, the present application provides the following technical solutions:
in a first aspect, the present application provides a network virtualization method for a heterogeneous optical network, including: converting the heterogeneous optical network into a virtual network with uniform wavelength resources through preset network virtualization operation, wherein the heterogeneous optical network at least comprises networking based on two different network communication technologies; and realizing end-to-end communication between the networks of the two different network communication technologies based on the virtual network with unified wavelength resources.
Further, the transforming the heterogeneous optical network into a virtual network with unified wavelength resources through a preset network virtualization operation, where the heterogeneous optical network at least includes a networking based on two different network communication technologies, includes: the heterogeneous optical network comprises a first communication network; and mapping the virtual links to wavelength resources in the actual optical fiber of the first communication network to obtain a plurality of virtual links, wherein each virtual link resource is used as the wavelength resource mapped by the virtual link.
Furthermore, the heterogeneous optical network further comprises a second communication network and a third communication network, and wavelength resources of virtual links generated by links of the first communication network and the third communication network are both divisible; the wavelength resources of the virtual links generated by the links of the second communication network are non-repartitionable.
Further, the first communication network comprises an SDM-EON network, the second communication network comprises a WDM network, and the third communication network comprises an EON network; creating a first virtual node and a second virtual node through a one-to-one node mapping relation, wherein the first virtual node and the second virtual node respectively map a first physical node and a second physical node; respectively acquiring all port resources of the first physical node and the second physical node through the first virtual node and the second virtual node; creating a plurality of virtual links at the first virtual node and the second virtual node according to the resource conditions owned by the SDM-EON network link, the WDM network link or the EON network link; mapping the virtual links on a physical link, and dividing physical resources on the physical link.
Further, the transforming the heterogeneous optical network into a virtual network with uniform wavelength resources through a preset network virtualization operation, where the heterogeneous optical network at least includes networking based on two different network communication technologies, and further includes: mapping wavelength resources on different wavelength resources of different fiber cores according to a preset crosstalk association group under the condition that the SDM-EON adopts a multi-core fiber with crosstalk between the fiber cores, wherein the preset crosstalk association group is an empty set under the condition that the SDM-EON adopts a channel-assisted or hole-assisted multi-core fiber; the preset crosstalk association set comprises a mutual exclusion association relationship among resources in the SDM-EON network link, and crosstalk constraints exist among the resources in the same crosstalk association set.
Further, the converting the heterogeneous optical network into a virtual network with uniform wavelength resources through a preset network virtualization operation further includes: the aggregation mode of the node resources in the link comprises the following steps: a plurality of physical switching nodes at the same machine room position are logically and simultaneously mapped by one virtual node; and obtaining the port resources of the physical switching nodes by the virtual nodes of the mapped physical switching nodes.
Further, the converting the heterogeneous optical network into a virtual network with uniform wavelength resources through a preset network virtualization operation further includes: the aggregation mode of link resources in a link includes: and under the condition that the multiple link resources are consistent and are connected end to end without a loop, mapping the multiple physical links based on one virtual link to obtain an aggregation result of the link resources.
In a second aspect, the present application provides a network virtualization apparatus for a heterogeneous optical network, including: the virtualization module is used for converting the heterogeneous optical network into a virtual network with uniform wavelength resources through preset network virtualization operation, wherein the heterogeneous optical network at least comprises networking based on two different network communication technologies; and the communication module is used for realizing end-to-end communication between the networking of the two different network communication technologies based on the virtual network with unified wavelength resources.
In a third aspect, the present application provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the network virtualization method for a heterogeneous optical network when executing the program.
In a fourth aspect, the present application provides a computer-readable storage medium having stored thereon a computer program, which when executed by a processor, implements the steps of the network virtualization method for a heterogeneous optical network.
According to the technical scheme, the heterogeneous optical network is converted into the virtual network with uniform wavelength resources through preset network virtualization operation, wherein the heterogeneous optical network at least comprises networking based on two different network communication technologies, so that the purpose of end-to-end communication between the networking based on the virtual network with uniform wavelength resources and the networking based on the two different network communication technologies is achieved. The network virtualization processing simplifies the end-to-end communication flow in the heterogeneous optical network and has compatibility with the heterogeneous optical network.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a heterogeneous network architecture of a network virtualization method for a heterogeneous optical network according to an embodiment of the present application;
fig. 2 is a schematic flowchart of a network virtualization method for a heterogeneous optical network according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a network virtualization apparatus of a heterogeneous optical network according to an embodiment of the present application;
fig. 4 is a schematic diagram illustrating a virtual link creation process in a network virtualization method for a heterogeneous optical network according to an embodiment of the present application;
fig. 5 is a schematic view of a virtual chain structure of aggregation resources in a network virtualization method for a heterogeneous optical network according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of an electronic device in an embodiment of the present application;
fig. 7 is a schematic diagram illustrating a crosstalk correlation between optical fiber cores of a heterogeneous optical network according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms of expertise in the examples of this application are explained as follows:
the Wavelength Division Multiplexing (WDM) technology is the mainstream backbone network transmission technology at present. In the optical fiber, a plurality of wavelengths are multiplexed by a multiplexer and transmitted through one optical fiber. The multiplexing technology greatly improves the resource utilization rate.
The Elastic Optical Network (EON) technology can distribute the whole frequency spectrum into a plurality of granular frequency slots, flexibly distribute frequency spectrum resources according to the size of each task request, and adjust the data rate and the modulation format.
Space Division Multiplexing flexible Optical Network (SDM-EON) is a technology which adopts Space Division Multiplexing on the technology of flexible Optical Network.
Space Division Multiplexing (SDM) is a method for implementing Multiplexing by using Space Division, and implements Space Division Multiplexing by combining a plurality of optical fibers into a bundle or implementing Space Division Multiplexing in the same optical fiber.
Heterogeneous optical networks: a network formed by networking a plurality of communication technologies together.
Multidimensional optical networks: a multi-dimensional optical network refers to a network having multiple communication dimensions, such as time, space, frequency, and pattern.
End-to-end communication: a communication initiated between two communication ports.
Network virtualization technology: the Network virtualization technology is used for realizing the virtualization of entity Network resources by using a Virtual Network (VN for short) so as to improve the flexibility and the scale of the Network.
It is considered that the virtualization schemes in the related art are all dedicated virtualization schemes proposed for a specific technology. The application provides a network virtualization method of a heterogeneous optical network, which enables end-to-end communication in the heterogeneous network to be performed as in one network by obtaining different technical networks to be compatible in a virtualization mode. The complex physical realization mechanism in a part of heterogeneous networks can be effectively shielded through a network virtualization technology, resources in the entity network are abstracted, scheduling management is further implemented on the basis, and the flexibility of the network is improved.
For network virtualization solutions, a network virtualization architecture model is based. The system is divided into 4 layers from bottom to top, namely a physical layer, a physical resource management control layer, an optical network virtual layer and a virtual network control management layer. The specific function of each layer is described below:
the physical layer is an underlying network for actually transmitting data and is responsible for the actual transmission process of the service in the whole network communication process. The physical layer devices comprise optical switches, servers, photoelectric conversion devices, multi-core optical fibers and the like, and the resource form of the physical layer devices is closely related to the actual network use technology of the physical layer.
The physical resource management control layer is responsible for the management work of the physical layer. The physical resource management control layer grasps the specific state of the network device of the physical layer managed by the physical resource management control layer, the supported network protocol, the topology structure of the network and the like. This layer actually encapsulates the management operations of the physical resources, incorporating the management work of the entire physical layer. The physical resource management layer provides an interface for controlling and managing physical resources upwards, and schedules and controls the actual resources to the physical layer downwards. The physical resource management layer provides a management tool of physical resources for the upper layer, and plays an important role in the scheduling management of the physical layer.
The optical network virtual layer is a provisioning layer of virtual network resources. The hierarchy is actually an abstract resource management layer constructed on the basis of physical resource concrete conditions in a logic way. The optical network virtual layer manages the virtual network resource pool. The resource pool is formed by abstracting the physical resource situation acquired by the physical resource management layer, so that the virtual network resources are closely associated with the physical resources, and the virtual network resources are necessarily the physical network resource subsets. For example, for a flexible optical network in a physical layer network, a transmission node with an ofdm switching capability can be abstracted as a virtual node, and the virtual node will obtain resource attributes of the corresponding physical node, including port resource conditions, the number of grids, and the like. Meanwhile, the optical network virtual layer also provides services for the upper layer, and provides a virtual network control method in the form of an interface. The optical network virtual layer provides virtual network resources to an upper layer, and a user or a network virtual network manager can acquire the required virtual network resource condition through an interface to carry out the next use.
The virtual network control management layer is the highest layer of the optical network virtualization system model. The control plane of the owned network provides services such as application, management, scheduling and the like of network resources for network users or service providers. The management layer receives the network virtual request of the network user, and the sexual network control layer obtains the optical network virtual layer resources through the control command and searches for proper resources to meet the requirements of the user.
As shown in fig. 1, the heterogeneous network architecture includes a physical network and a virtual network having a network mapping relationship with the physical network. Specifically, the underlying physical networks are composed of three different network technologies, WDM, EON, and SDM-EON, respectively, each of which has different resources and constraints. By means of virtualization, the three physical networks can be integrated into the same virtual network.
In addition, the virtual-based switching node may map one or more physical switching nodes, and the physical links may integrate resources into link resources of the virtual plane through virtualization.
Therefore, the heterogeneous characteristics of the three networks can be shielded through the network virtualization, and the same abstract resource represents all heterogeneous network resources, so that a virtual network plane with uniform resources is generated.
As shown in fig. 2, a schematic flow chart of a network virtualization method of a heterogeneous optical network in the embodiment of the present application is shown, which includes the following steps:
step S201, converting the heterogeneous optical network into a virtual network with uniform wavelength resources through a preset network virtualization operation, wherein the heterogeneous optical network at least comprises networking based on two different network communication technologies;
step S202, based on the virtual network with unified wavelength resources, the end-to-end communication between the networking of the two different network communication technologies is realized.
As can be seen from the above description, in the network virtualization method for a heterogeneous optical network provided in the embodiment of the present application, the heterogeneous optical network is converted into a virtual network with uniform wavelength resources through a preset network virtualization operation, where the heterogeneous optical network at least includes a networking based on two different network communication technologies, so that the purpose of end-to-end communication between the networking based on the virtual network with uniform wavelength resources and the networking based on the two different network communication technologies is achieved. The network virtualization processing simplifies the end-to-end communication flow in the heterogeneous optical network and has compatibility with the heterogeneous optical network.
In the step S201, the heterogeneous optical network is converted into a virtual network with uniform wavelength resource dimension through a preset network virtualization operation. That is, although the resource constraints are different, the resources can be unified to the wavelength resources. Therefore, the physical link can be virtualized by using the wavelength as a uniform resource dividing condition.
As an optional implementation, the virtual links are mapped onto the wavelength resources in the actual optical fiber, so as to form a plurality of virtual links, and each virtual link resource is equivalent to the resource of the wavelength mapped with the virtual link resource.
As a preferred embodiment, the transforming, by a preset network virtualization operation, the heterogeneous optical network into a virtual network with unified wavelength resources, where the heterogeneous optical network includes at least two networks based on different network communication technologies, includes: the heterogeneous optical network comprises a first communication network (i.e., an SDM-EON network); and mapping the virtual links to wavelength resources in the actual optical fiber of the first communication network to obtain a plurality of virtual links, wherein each virtual link resource is used as the wavelength resource mapped by the virtual link.
As a preferred embodiment, the heterogeneous optical network further includes a second communication network (i.e., a WDM network) and a third communication network (i.e., an EON network), and wavelength resources of virtual links generated by links of the first communication network and the third communication network are both repartitionable; the wavelength resources of the virtual links generated by the links of the second communication network are non-repartitionable.
In particular, the wavelength resource of the virtual link generated by the WDM link is not separable because the wavelength resource of the WDM is not separable in resource granularity. While EON and SDM-EON use orthogonal frequency division multiplexing techniques, the wavelength of the virtual links mapped on the EON and SDM-EON links is a re-partitionable resource granularity.
In the above step S202, based on the established virtual network with unified wavelength resources, the end-to-end communication between the networking of the two different network communication technologies is implemented.
As a preferred embodiment, on the plane of the virtual network, end-to-end communication actually shields resource complexity caused by a heterogeneous network at the bottom layer, routing selection and resource allocation are performed through uniform resources, and finally actual physical resources are used in a virtual mapping manner, thereby implementing an end-to-end seamless communication service mechanism.
As a preferred implementation mode, the unification of network resources is realized based on the wavelength resource unified virtual network compatible WDM, EON and SDM-EON heterogeneous multi-dimensional optical network.
As a preference in this embodiment, the first communication network comprises an SDM-EON network, the second communication network comprises a WDM network, and the third communication network comprises an EON network; creating a first virtual node and a second virtual node through a one-to-one node mapping relationship, wherein the first virtual node and the second virtual node map a first physical node and a second physical node respectively; respectively acquiring all port resources of the first physical node and the second physical node through the first virtual node and the second virtual node; creating a plurality of virtual links at the first virtual node and the second virtual node according to the resource conditions owned by the SDM-EON network link, the WDM network link or the EON network link; mapping the virtual links on a physical link, and dividing physical resources on the physical link.
In specific implementation, the main attributes in the virtual link are defined as follows:
when creating a virtual link (taking SDM-EON as an example), it can be done as follows:
as shown in FIG. 4, a starting point is n1End point is n2SDM-EON link l of12 xAssume that its resources include 2 cores and 2 channels.
First, through one-to-one node mapping, two virtual nodes n are created1', and n2', and node n1' and n2' separately mapping physical nodes n1And n2. Node n1' and n2' then respectively obtain the physical nodes n1And a physical node n2All port resources of (2).
Then, according to SDM-EON link l12 xIn the case of owned resources, 4 virtual links l are created between two virtual nodes12 v0、l12 v1、l12 v2And l12 v3. All 4 virtual links are mapped on physical link l12 xTo l12 xIs divided.
Link l12 v0Has a central wavelength of λ1The center wavelength of the core numbered 1 with its mapped resource being link l _ x ^12 is λ1The wavelength resource of (1).
Link l12 v1Has a central wavelength of λ2The mapped resource is link l12 xThe center wavelength of the core numbered 1 is λ2The wavelength resource of (1).
Link l12 v2Has a central wavelength of λ1The mapped resource is link l12 xThe center wavelength of the core numbered 2 is λ1The wavelength resource of (1).
Link l12 v3Has a central wavelength of λ2The mapped resource is chain l12 xThe center wavelength of the core numbered 2 is λ2The wavelength resource of (1).
That is, through the virtualization process described above, the SDM-EON network construction may be converted into a virtual network. The WDM network and the EON network are similar processes, the virtual links are mapped to wavelength resources in an actual optical fiber to form a plurality of virtual links, and each virtual link resource is equivalent to the wavelength resource mapped by the virtual link resource. The processes of generating virtual links and performing virtual mapping are somewhat different due to the different resource constraints imposed by WDM, EON and SDM-EON. The wavelength resources of the WDM are of an indivisible resource granularity, and thus the wavelength resources of the virtual link generated by the WDM link are indivisible. The EON and SDM-EON use orthogonal frequency division multiplexing techniques, so the wavelength of the virtual links mapped on the EON and SDM-EON links is a re-partitionable resource granularity. If the SDM-EON uses a multicore fiber with crosstalk between fiber cores, the virtual link must consider avoiding crosstalk in the mapping process to map wavelengths onto different wavelength resources of different fiber cores.
As a preferred option in this embodiment, the transforming the heterogeneous optical network into a virtual network with uniform wavelength resources through a preset network virtualization operation, where the heterogeneous optical network at least includes networking based on two different network communication technologies, and further includes: mapping wavelength resources on different wavelength resources of different fiber cores according to a preset crosstalk association group under the condition that the SDM-EON adopts a multi-core fiber with crosstalk between the fiber cores, wherein the preset crosstalk association group is an empty set under the condition that the SDM-EON adopts a channel-assisted or hole-assisted multi-core fiber; the preset crosstalk association set comprises a mutual exclusion association relationship among resources in the SDM-EON network link, and crosstalk constraints exist among the resources in the same crosstalk association set.
In particular, the crosstalk problem in the virtualization of the SDM-EON network is a limiting factor to be considered. Inter-mode crosstalk issues need to be considered for SDMs implemented using multimode fibers and inter-core crosstalk issues need to be considered for SDMs implemented using multi-core fibers. In order to solve the crosstalk limiting factor in the SDM technology to some extent, shielding against crosstalk is also required to be implemented in the virtualization process. Therefore, the crosstalk shielding is realized in the virtualization process based on the concept of the crosstalk association group.
The preset crosstalk association set comprises a mutual exclusion association relationship among resources in the SDM-EON network link, and crosstalk constraint exists among the resources in the same crosstalk association set.
Further, mutually exclusive resources are bound through the crosstalk association group in the virtualization process. When there is one resource in the set of resources that is virtualized, the other resources will no longer be virtualized. By reasonably arranging the resources with crosstalk into different crosstalk association groups, the shielding of the crosstalk of the resources can be realized after virtualization.
As shown in fig. 7, a 7-core single-mode fiber with the simplest structure is taken as an example to illustrate how crosstalk constraints are shielded in a virtualization process by using crosstalk association. Fig. 7 is a schematic cross-sectional view of a 7-core single-mode fiber, in which a very strong inter-core crosstalk between adjacent cores is observed in a simple multicore fiber. For example, there is crosstalk between core number 1 and core numbers 2, 7 and 6. While non-adjacent cores have no crosstalk effect, for example, cores No. 1, 3 and 5 are a group of cores that have no crosstalk effect. Through the form of the crosstalk association group, the fiber cores with crosstalk can be effectively avoided in the virtualization process to be virtualized.
First, different cores are given numbers from 1 to 7, and the crosstalk association of the core No. 1 is about the core No. 2, the core No. 6 and the core No. 7, which shows that the core No. 1 and the core No. 2, the core No. 6 and the core No. 7 have crosstalk.
In the process of virtualizing the link, if the resource of the first core is virtualized, the resources of the cores No. 2 and No. 6 and No. 7 in the group associated with crosstalk will be set to the shielding mode, and will not be virtualized further.
The crosstalk association is a flexible association form, and it will have different association forms according to different fiber characteristics, for example, if the multicore fiber uses a channel-assisted/hole-assisted multicore fiber, the crosstalk between adjacent cores can be effectively reduced, the crosstalk association of each core will be an empty set, and all cores will be considered in the virtualization process.
As a preferred embodiment in this embodiment, the converting the heterogeneous optical network into a virtual network with uniform wavelength resources through a preset network virtualization operation further includes: the aggregation mode of the node resources in the link comprises the following steps: a plurality of physical switching nodes at the same machine room position are logically and simultaneously mapped by one virtual node; and obtaining the port resources of the physical switching nodes by the virtual nodes of the mapped physical switching nodes.
In specific implementation, the heterogeneous multi-dimensional optical network of WDM, EON and SDM-EON mixed networking can be converted into a virtual network with uniform resources through virtualization. As shown in fig. 5, this scheme also supports the aggregation of resources. For a node, a plurality of physical switching nodes in the same machine room can be logically and simultaneously mapped by one virtual node, and the virtual node mapping the plurality of physical switching nodes obtains port resources of the physical switching nodes, so that the node resources are aggregated and managed. For the link, if the resource of a plurality of links is consistent and no loop exists when the links are connected in an end-to-end manner, the links can be aggregated and synthesized into a plurality of virtual links with longer distance. In this case, one virtual link maps multiple physical links to form an aggregate of resource links.
As a preferred embodiment in this embodiment, the converting the heterogeneous optical network into a virtual network with uniform wavelength resources through a preset network virtualization operation further includes: the aggregation mode of link resources in a link includes: and under the condition that the multiple link resources are consistent and are connected end to end without a loop, mapping the multiple physical links based on one virtual link to obtain an aggregation result of the link resources.
In specific implementation, the heterogeneous multi-dimensional optical network of WDM, EON and SDM-EON mixed networking can be converted into a virtual network with uniform resources through virtualization. As shown in fig. 5, this scheme also supports the aggregation of resources. For the link, if the resource of a plurality of links is consistent and no loop exists when the links are connected in an end-to-end manner, the links can be aggregated and synthesized into a plurality of virtual links with longer distance. In this case, one virtual link maps multiple physical links to form an aggregate of resource links.
As shown in fig. 3, in another embodiment of the present application, there is provided a network virtualization apparatus for a heterogeneous optical network, including:
a virtualization module 301, configured to convert the heterogeneous optical network into a virtual network with uniform wavelength resources through a preset network virtualization operation, where the heterogeneous optical network at least includes networking based on two different network communication technologies;
a communication module 302, configured to implement end-to-end communication between the two networks of different network communication technologies based on the virtual network with unified wavelength resources.
In the virtualization module 301 in the embodiment of the present application, the heterogeneous optical network is converted into a virtual network with uniform wavelength resource dimensions through a preset network virtualization operation. That is, although the resource constraints are different, the resources can be unified to the wavelength resources. Therefore, the physical link can be virtualized by using the wavelength as a uniform resource dividing condition.
As an optional implementation, the virtual links are mapped onto the wavelength resources in the actual optical fiber, so as to form a plurality of virtual links, and each virtual link resource is equivalent to the resource of the wavelength mapped with the virtual link resource.
As a preferred embodiment, the transforming, by a preset network virtualization operation, the heterogeneous optical network into a virtual network with unified wavelength resources, where the heterogeneous optical network includes at least two networks based on different network communication technologies, includes: the heterogeneous optical network comprises a first communication network (i.e., an SDM-EON network); and mapping the virtual links to wavelength resources in the actual optical fiber of the first communication network to obtain a plurality of virtual links, wherein each virtual link resource is used as the wavelength resource mapped by the virtual link.
As a preferred embodiment, the heterogeneous optical network further includes a second communication network (i.e., a WDM network) and a third communication network (i.e., an EON network), and wavelength resources of virtual links generated by links of the first communication network and the third communication network are both repartitionable; the wavelength resources of the virtual links generated by the links of the second communication network are non-repartitionable.
In particular, the wavelength resource of the virtual link generated by the WDM link is not separable because the wavelength resource of the WDM is not separable in resource granularity. While EON and SDM-EON use orthogonal frequency division multiplexing techniques, the wavelength of the virtual links mapped on the EON and SDM-EON links is a re-partitionable resource granularity.
In the communication module 302 in this embodiment of the present application, based on the established virtual network with unified wavelength resources, end-to-end communication between networking of the two different network communication technologies is implemented.
As a preferred embodiment, on the plane of the virtual network, end-to-end communication actually shields resource complexity caused by a heterogeneous network at the bottom layer, routing selection and resource allocation are performed through uniform resources, and finally actual physical resources are used in a virtual mapping manner, thereby implementing an end-to-end seamless communication service mechanism.
As a preferred implementation mode, the unification of network resources is realized based on the wavelength resource unified virtual network compatible WDM, EON and SDM-EON heterogeneous multi-dimensional optical network.
An embodiment of the present application further provides a specific implementation manner of an electronic device, which is capable of implementing all steps in the network virtualization method of the heterogeneous optical network in the foregoing embodiment, and with reference to fig. 6, the electronic device specifically includes the following contents:
a processor (processor)601, a memory (memory)602, a communication Interface (Communications Interface)603, and a bus 604;
the processor 601, the memory 602 and the communication interface 603 complete mutual communication through the bus 604; the processor 601 is configured to call the computer program in the memory 602, and the processor executes the computer program to implement all the steps in the network virtualization method of the heterogeneous optical network in the above embodiments, for example, when the processor executes the computer program, the processor implements the following steps:
step 100: converting the heterogeneous optical network into a virtual network with uniform wavelength resources through preset network virtualization operation, wherein the heterogeneous optical network at least comprises networking based on two different network communication technologies;
step 200: and realizing end-to-end communication between the networks of the two different network communication technologies based on the virtual network with unified wavelength resources.
As can be seen from the above description, the electronic device provided in the embodiment of the present application can convert the heterogeneous optical network into a virtual network with unified wavelength resources through a preset network virtualization operation, where the heterogeneous optical network at least includes a networking based on two different network communication technologies, so as to achieve the purpose of implementing end-to-end communication between the networking based on the virtual network with unified wavelength resources and the networking based on the two different network communication technologies. The network virtualization processing simplifies the end-to-end communication flow in the heterogeneous optical network and has compatibility with the heterogeneous optical network.
An embodiment of the present application further provides a computer-readable storage medium capable of implementing all the steps in the network virtualization method of the heterogeneous optical network in the above embodiment, where the computer-readable storage medium stores thereon a computer program, and when the computer program is executed by a processor, the computer program implements all the steps of the network virtualization method of the heterogeneous optical network in the above embodiment, for example, when the processor executes the computer program, the processor implements the following steps:
step 100: converting the heterogeneous optical network into a virtual network with uniform wavelength resources through preset network virtualization operation, wherein the heterogeneous optical network at least comprises networking based on two different network communication technologies;
step 200: and realizing end-to-end communication between the networks of the two different network communication technologies based on the virtual network with unified wavelength resources.
As can be seen from the above description, the computer-readable storage medium provided in this embodiment of the present application can convert the heterogeneous optical network into a virtual network with uniform wavelength resources through a preset network virtualization operation, where the heterogeneous optical network at least includes a networking based on two different network communication technologies, so as to achieve the purpose of implementing end-to-end communication between the networking based on the virtual network with uniform wavelength resources and the networking based on the two different network communication technologies. The network virtualization processing simplifies the end-to-end communication flow in the heterogeneous optical network and has compatibility with the heterogeneous optical network.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the hardware + program class embodiment, since it is substantially similar to the method embodiment, the description is simple, and the relevant points can be referred to the partial description of the method embodiment.
The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
Although the present application provides method steps as described in an embodiment or flowchart, additional or fewer steps may be included based on conventional or non-inventive efforts. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an actual apparatus or client product executes, it may execute sequentially or in parallel (e.g., in the context of parallel processors or multi-threaded processing) according to the embodiments or methods shown in the figures.
The systems, devices, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or by a product with certain functions. One typical implementation device is a computer. In particular, the computer may be, for example, a personal computer, a laptop computer, a vehicle-mounted human-computer interaction device, a cellular telephone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
As will be appreciated by one skilled in the art, embodiments of the present description may be provided as a method, system, or computer program product. Accordingly, embodiments of the present description may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects.
The embodiments of this specification may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The described embodiments may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the specification. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only an example of the present specification, and is not intended to limit the present specification. Various modifications and variations to the embodiments described herein will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present specification should be included in the scope of the claims of the embodiments of the present specification.
Claims (10)
1. A network virtualization method for a heterogeneous optical network, comprising:
converting the heterogeneous optical network into a virtual network with uniform wavelength resources through preset network virtualization operation, wherein the heterogeneous optical network at least comprises networking based on two different network communication technologies;
and realizing end-to-end communication between the networks of the two different network communication technologies based on the virtual network with unified wavelength resources.
2. The method according to claim 1, wherein the transforming the heterogeneous optical network into a virtual network with unified wavelength resources through a preset network virtualization operation, wherein the heterogeneous optical network includes at least two different networking technologies, includes:
the heterogeneous optical network comprises a first communication network;
and mapping the virtual links to wavelength resources in the actual optical fiber of the first communication network to obtain a plurality of virtual links, wherein each virtual link resource is used as the wavelength resource mapped by the virtual link.
3. The method of claim 2,
the heterogeneous optical network further comprises a second communication network and a third communication network,
the wavelength resources of the virtual links generated by the links of the first communication network and the third communication network can be divided again;
the wavelength resources of the virtual links generated by the links of the second communication network are non-repartitionable.
4. The method of claim 2,
the first communication network comprises an SDM-EON network, the second communication network comprises a WDM network, and the third communication network comprises an EON network;
creating a first virtual node and a second virtual node through a one-to-one node mapping relationship, wherein the first virtual node and the second virtual node map a first physical node and a second physical node respectively;
respectively acquiring all port resources of the first physical node and the second physical node through the first virtual node and the second virtual node;
creating a plurality of virtual links at the first virtual node and the second virtual node according to the resource conditions owned by the SDM-EON network link, the WDM network link or the EON network link;
mapping the virtual links on a physical link, and dividing physical resources on the physical link.
5. The method according to claim 4, wherein the transforming the heterogeneous optical network into a virtual network with unified wavelength resources through a preset network virtualization operation, wherein the heterogeneous optical network includes at least networking based on two different network communication technologies, further comprises:
under the condition that the SDM-EON adopts a multi-core optical fiber with crosstalk between fiber cores, mapping wavelength resources on different wavelength resources of different fiber cores according to a preset crosstalk association group,
when the SDM-EON adopts a channel-assisted or hole-assisted multi-core fiber, presetting a crosstalk association group as an empty set;
the preset crosstalk association set comprises a mutual exclusion association relationship among resources in the SDM-EON network link, and crosstalk constraints exist among the resources in the same crosstalk association set.
6. The method according to claim 1, wherein the transforming the heterogeneous optical network into a virtual network with unified wavelength resources through a preset network virtualization operation further comprises:
the aggregation mode of the node resources in the link comprises the following steps:
a plurality of physical switching nodes at the same machine room position are logically and simultaneously mapped by one virtual node;
and obtaining the port resources of the physical switching nodes by the virtual nodes of the mapped physical switching nodes.
7. The method according to claim 1, wherein the transforming the heterogeneous optical network into a virtual network with unified wavelength resources through a preset network virtualization operation further comprises:
the aggregation mode of link resources in a link includes:
and under the condition that the multiple link resources are consistent and are connected end to end without a loop, mapping the multiple physical links based on one virtual link to obtain an aggregation result of the link resources.
8. A network virtualization apparatus for a heterogeneous optical network, comprising:
the virtualization module is used for converting the heterogeneous optical network into a virtual network with uniform wavelength resources through preset network virtualization operation, wherein the heterogeneous optical network at least comprises networking based on two different network communication technologies;
and the communication module is used for realizing end-to-end communication between the networking of the two different network communication technologies based on the virtual network with unified wavelength resources.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method according to any of claims 1 to 7 are implemented when the program is executed by the processor.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of any one of claims 1 to 7.
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