CN114567826A - Network slice management method, controller and computer readable storage medium - Google Patents
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Abstract
The invention provides a network slice management method, a controller and a computer readable storage medium, wherein the network slice management method comprises the following steps: acquiring all node pairs in a network topology, and determining all transmission paths corresponding to each node pair; allocating a first network resource to the transmission path according to a preset first slice allocation strategy, and determining a set of the transmission paths obtained after the first network resource is allocated as a first network slice; and determining a second network slice from the first network slice according to a preset second slice allocation strategy, wherein a transmission path in the second network slice is allocated with a second network resource which accords with the second slice allocation strategy. According to the scheme provided by the embodiment of the invention, the obtained network slice can meet the requirements from the dimensionality of at least two network resources through at least two slice allocation strategies, the OTN control fineness and the customization degree are favorably improved, and the network resources are fully utilized.
Description
Technical Field
The present invention relates to, but not limited to, the field of communication technologies, and in particular, to a network slice management method, a controller, and a computer-readable storage medium.
Background
Optical Transport Networks (OTNs) are an important part of the 5G Network architecture and are generally considered to be deployed on 5G intermediate and return networks. In order to realize customized Service and refined management and control of network resources and meet higher performance requirements of 5G services, network resources need to be allocated according to a Service-Level agent (SLA), so as to implement network slicing of the OTN.
At present, network slices of the OTN are mainly based on a single resource attribute or a single policy, but as optical communication technologies enter the era exceeding 100G, more and more resource attributes can be flexibly scheduled at an application layer, and the existing slicing method cannot perform management and control from the resource attributes of multiple dimensions, cannot meet the increasing requirements of refined management and customized service, and cannot fully utilize network resources of the OTN.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
Embodiments of the present invention provide a network slice management method, a controller, and a computer-readable storage medium, which can fully utilize network resources and improve the control fineness and the customization degree of an OTN.
In a first aspect, an embodiment of the present invention provides a network slice management method, including:
acquiring all node pairs in a network topology, and determining all transmission paths corresponding to each node pair;
allocating a first network resource to the transmission path according to a preset first slice allocation strategy, and determining a set of the transmission paths obtained after the first network resource is allocated as a first network slice;
and determining a second network slice from the first network slice according to a preset second slice allocation strategy, wherein a transmission path in the second network slice is allocated with a second network resource which accords with the second slice allocation strategy.
In a second aspect, an embodiment of the present invention further provides a controller, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the network slice management method according to the first aspect when executing the computer program.
In a third aspect, an embodiment of the present invention further provides a computer-readable storage medium storing computer-executable instructions for performing the network slice management method according to the first aspect.
The embodiment of the invention comprises the following steps: acquiring all node pairs in a network topology, and determining all transmission paths corresponding to each node pair; allocating a first network resource to the transmission path according to a preset first slice allocation strategy, and determining a set of the transmission paths obtained after the first network resource is allocated as a first network slice; and determining a second network slice from the first network slice according to a preset second slice allocation strategy, wherein a transmission path in the second network slice is allocated with a second network resource which accords with the second slice allocation strategy. According to the scheme provided by the embodiment of the invention, the obtained network slice can meet the requirements from the dimensionality of at least two network resources through at least two slice allocation strategies, the OTN control fineness and the customization degree are favorably improved, and the network resources are fully utilized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a flowchart of a network slice management method provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of a network topology provided by another embodiment of the present invention;
fig. 3 is a flowchart for determining a transmission path according to OVPN according to another embodiment of the present invention;
FIG. 4 is a schematic diagram of a virtual network topology provided by another embodiment of the present invention;
fig. 5 is a flowchart for determining a transmission path according to a physical link according to another embodiment of the present invention;
FIG. 6 is a flow chart of allocating a first network resource provided by another embodiment of the present invention;
FIG. 7 is a flow diagram for determining a second network slice by allocating second network resources according to another embodiment of the present invention;
fig. 8 is a flow chart for determining a second network slice from a first network slice according to another embodiment of the present invention;
fig. 9 is a flow chart of determining at least two second network slices from a first network slice according to another embodiment of the present invention;
FIG. 10 is a flow diagram for determining network slices based on the number of attributes of a network resource, as provided by another embodiment of the present invention;
fig. 11 is a flowchart of a network slice management method according to another embodiment of the present invention;
fig. 12 is a schematic diagram of a first network slice provided by another embodiment of the invention;
fig. 13 is a schematic diagram of a first network slice provided by another embodiment of the invention;
fig. 14 is a schematic diagram of a first network slice provided by another embodiment of the invention;
FIG. 15 is a schematic diagram of a second network slice derived from the first network slice shown in FIG. 12 according to another embodiment of the invention;
FIG. 16 is a schematic diagram of a second network slice derived from the first network slice shown in FIG. 12 according to another embodiment of the invention;
FIG. 17 is a schematic diagram of a third network slice derived from the second network slice shown in FIG. 15 according to another embodiment of the invention;
FIG. 18 is a schematic diagram of a third network slice derived from the second network slice shown in FIG. 15 according to another embodiment of the invention;
FIG. 19 is a schematic diagram of a third network slice derived from the second network slice shown in FIG. 16 according to another embodiment of the invention;
FIG. 20 is a schematic diagram of a third network slice derived from the second network slice shown in FIG. 16 according to another embodiment of the invention;
fig. 21 is a schematic topology diagram of a network slice provided by another embodiment of the present invention;
fig. 22 is a schematic diagram of a controller according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that although functional blocks are partitioned in a schematic diagram of an apparatus and a logical order is shown in a flowchart, in some cases, the steps shown or described may be performed in a different order than the partitioning of blocks in the apparatus or the order in the flowchart. The terms "first" and "second" in the description, in the claims, or in the above-described figures are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The invention provides a network slice management method, a controller and a computer readable storage medium, wherein the network slice management method comprises the following steps: acquiring all node pairs in a network topology, and determining all transmission paths corresponding to each node pair; allocating a first network resource to the transmission path according to a preset first slice allocation strategy, and determining a set of the transmission paths obtained after the first network resource is allocated as a first network slice; and determining a second network slice from the first network slice according to a preset second slice allocation strategy, wherein a transmission path in the second network slice is allocated with second network resources meeting the second slice allocation strategy. According to the scheme provided by the embodiment of the invention, the obtained network slice can meet the requirements from the dimensionality of at least two network resources through at least two slice allocation strategies, the OTN control fineness and the customization degree are favorably improved, and the network resources are fully utilized.
It should be noted that the physical links described in the embodiment of the present invention are links directly connected between two physical nodes in a physical topology, for example, as shown by solid lines in the physical topology shown in fig. 2; the virtual link is a link directly connected between two nodes obtained by virtualization in the OVPN, for example, as shown by each dotted line in the OVPN topology shown in fig. 4; a physical path is a path consisting of several physical links connected, for example in the physical topology shown in fig. 2, a physical path a-B-D consists of a physical link a-B and a physical link B-D. The related concepts in the embodiments of the present invention refer to the above explanations, and are not repeated in the following.
The embodiments of the present invention will be further explained with reference to the drawings.
As shown in fig. 1, fig. 1 is a flowchart of a network slice management method according to an embodiment of the present invention, in which the network slice management method includes, but is not limited to, step S110, step S120, and step S130.
Step S110, acquiring all node pairs in the network topology, and determining all transmission paths corresponding to each node pair.
As will be appreciated by those skilled in the art, to implement network slicing, at least two nodes are required to be included in the network topology to form transmission paths, with each node forming a node pair between each other. It should be noted that a node in the network topology may be a network element in an OTN, and a physical transmission link may be formed between every two nodes, which is not limited to a specific physical form of the node in this embodiment.
In an embodiment, the network topology may be a physical topology, for example, fig. 2 shows an undirected physical topology of a super 100G optical transmission network, where the network topology includes 5 nodes, which are a node a, a node B, a node C, a node D, and a node E, and a hardware structure of each node may be the same or different, and is selected according to actual requirements. It should be noted that the physical topology shown in fig. 2 is only an example for explaining the technical solution in this embodiment, and is not a limitation on the network topology of the present invention, and details are not described again in the following.
It should be noted that, referring to fig. 2, the network topology shown in fig. 2 includes 5 nodes, but the number of nodes may also be increased or decreased according to the needs of a user, for example, only network slices involving A, B, C and D nodes are needed, node E may not be considered when determining transmission paths and slice allocation, and complexity of calculation is reduced.
It should be noted that, in order to fully utilize network resources, the embodiment may determine all transmission paths corresponding to each node pair in a traversal manner, for example, the transmission path between the node pair AB may include a physical path a-B and a physical path a-D-B, which is not exhaustive for simplicity and convenience of description.
Step S120, allocating a first network resource to the transmission path according to a preset first slice allocation policy, and determining a set of transmission paths obtained after the first network resource is allocated as a first network slice.
It should be noted that, for the super 100G optical transport network, the types of network resources are many, and may be any resource related to the OTN, such as a wavelength, a service rate, a spectrum width, and a modulation mode, so that the network resource allocation may determine a specific value of one type of network resource, and then perform allocation of other types of network resources according to an actual resource situation, for example, after determining a transmission path, set the service rates of all transmission paths to 224Gb/s, complete allocation of other network resources according to available resources on the basis, and select according to a preset condition when determining a second network slice; in addition, since the technical side of the present invention needs to complete the slicing at least twice, the allocation of the first network resource may also be performed according to the first slice allocation policy, the set of transmission paths that can be allocated to the first network resource is determined as the first network slice, other network resources are not allocated, but the allocation of all network resources is completed after the second network slice is determined according to the second slice allocation policy, and the allocation may be completed according to the actually available resources, and the specific manner may be selected according to the actual needs. It can be understood that, in addition to the network resources that need to be allocated, the network resources may also include physical resources of the physical link itself, such as transmission delay, transmission distance, and transmission cost, where the physical resources may be determined according to an actual situation of the physical link itself, for example, depending on the transmission distance of the physical link, and if the transmission path is a physical path formed by a plurality of physical links, the physical resources corresponding to the physical links involved may be added, which is not described herein again.
It should be noted that, in all the transmission paths determined in step S110, if the actually available resources are limited, a situation may occur that some transmission paths cannot be allocated to resources, and therefore, after the allocation of the first network resource is completed according to the first slice allocation policy, the set of transmission paths successfully allocated to the network resource may be determined as the first network slice, so as to ensure the availability of the transmission paths in the first network slice.
It can be understood that the number of the first network slices may be any, and may be the same as the number of the first slice allocation policies, for example, for consideration of requirements, two first slice allocation policies are set, and correspond to two service rates with different values, respectively, so as to obtain two first network slices, and then the second network slice is determined on the basis of each first network slice, and the number of the first slice allocation policies may be adjusted according to actual slice requirements, which is not described herein again.
Step S130, determining a second network slice from the first network slice according to a preset second slice allocation policy, where a transmission path in the second network slice is allocated with a second network resource conforming to the second slice allocation policy.
It should be noted that the number of slice allocation policies may also be adjusted according to actual requirements, and at least two or more slice allocation policies may be included, and network slice allocation may be implemented from the dimensions of multiple network resources. It can be understood that, for the requirement of customized management, SLA level division may be performed on slice allocation policies related to the same resource attribute, for example, the slice allocation policies are sequentially divided into "diamond level", "platinum level", "gold level" and "silver level" according to performance from high to low, a user may select a specific level of the slice allocation policy according to the own requirement, and an operator allocates a corresponding slice to the user according to the level of the slice allocation policy selected by the user, thereby implementing customized and fine management of a network slice. It should be noted that the foregoing grading manner is not a limitation to the embodiment of the present invention, and is only an example for convenience of description of the technical solution.
It should be noted that the number of the second slices may be determined, according to an actual requirement, on the basis of the first network slice, a plurality of second network slices that meet the second slice allocation policy are determined, for example, the first network resource corresponds to a service rate, the service rate of the transmission path in the first network slice meets the first slice allocation policy, and the allocation of other network resources is completed by combining with an actually available resource, on this basis, the second slice policy may adopt a condition related to transmission delay, for example, a transmission path whose transmission delay is greater than a certain preset value is screened out from the first network slice, and an obtained set of transmission paths is the second network slice, so the number of the second network slices may be determined by adjusting the second slice policy, and the specific number is not limited in this embodiment.
It should be noted that, in order to implement that the network slice meets the user requirement from multiple dimensions, the second network resource and the first network resource may have different resource attributes, the types of the network resources corresponding to the first slice policy and the second slice policy may be preset, a specific setting mode may be selected according to an actual situation, and this embodiment is not limited to many cases.
It is to be understood that when a plurality of first network slices are derived in step S120 due to having a plurality of first slice allocation policies, it can be ensured that the second network slice is determined to be derived based on one first network slice, so as to ensure that the second network slice simultaneously satisfies the first slice allocation policies and the second slice allocation policies.
In addition, referring to fig. 3, in an embodiment, the step S100 in the embodiment shown in fig. 1 further includes, but is not limited to, the following steps:
step S310, generating an OVPN according to all node pairs;
step S320, determining a virtual link corresponding to each node pair in the OVPN;
step S330, determining all transmission paths corresponding to each node pair according to the determined virtual links.
In an embodiment, when determining nodes available in the network topology, all transmission paths may be determined according to a virtualized topology, and a description of a method for determining transmission paths is given below with a specific example based on the physical topology shown in fig. 2:
virtualizing paths between all node pairs in the physical topology as direct virtual links, and virtualizing all node pairs as virtual node pairs, thereby constituting the OVPN topology shown in fig. 4. According to the node pairs involved in the virtual links, traversal is performed in the physical topology shown in fig. 2, so that a set of physical paths corresponding to each virtual link is obtained as all transmission paths, for example, for the node pair AB, the virtual path is a 'B', and all the corresponding transmission paths are: the transmission paths of the physical path a-B, the physical path a-D-B, the physical path a-E-D-B, and the physical path a-C-E-D-B, and other node pairs are obtained in the same manner, and are not described in detail herein.
It can be understood that after all transmission paths corresponding to the virtual link are determined, a set of physical paths related to the virtual link can be obtained, and therefore, the OVPN obtained by allocating the network resources according to the slice allocation policy is the network slice obtained by using the slice allocation policy.
In addition, referring to fig. 5, in an embodiment, the step S230 in the embodiment shown in fig. 3 further includes, but is not limited to, the following steps:
step S510, determining available physical links in network topology;
step S520, determining all physical paths corresponding to each virtual link according to the physical links, wherein the physical paths consist of a plurality of physical links;
step S530 determines all physical paths corresponding to the virtual links as all transmission paths corresponding to each node pair.
In an embodiment, it should be noted that the feasibility of the transmission path needs to be determined according to specific network resources, for example, according to an actual network resource situation, a network resource cannot be allocated to a certain physical link, for example, there is no available wavelength, the physical link may be considered as unavailable, the transmission path is determined without consideration, and the available network resources in the network topology may be determined according to the actual situation.
It should be noted that the transmission path in this embodiment is a physical path composed of physical links, for example, in the physical topology shown in fig. 2, not all node pairs have a physical link therebetween, so for example, there is a direct physical link a-C from node a to node C, but there is no direct physical link from node B to node C, and therefore the transmission path from node B to node C may be a transmission path B-a-C composed of a physical link B-a and a physical link AC.
In addition, referring to fig. 6, in an embodiment, the step S110 in the embodiment shown in fig. 1 further includes, but is not limited to, the following steps:
step S610, determining resource parameters according to a preset first slice allocation strategy;
step S620, allocating resource parameters for the physical link;
step S630, obtaining a transmission path allocated with a first network resource according to the physical link allocated with the resource parameter, where the first network resource includes the resource parameter.
It should be noted that the resource parameter determined by the first slicing policy may be any network resource that can be allocated, such as a service rate, a spectrum width, a wavelength, a modulation mode, and the like, and the specific type may be selected according to actual requirements.
It should be noted that the specific value of the resource parameter obtained in step S620 needs to be determined according to the type of the resource parameter, for example, the service rate allocation may be performed, and all physical links allocate the same rate, which does not cause collision, so that the resource parameter can be normally allocated. For the above reasons, when the first network resource is allocated, it may be performed for a single physical link, so as to ensure that the physical link can be normally allocated to the corresponding network resource, and avoid a situation that the physical link is unavailable.
It can be understood that, when allocating a resource parameter to a physical link, only whether a first network resource can be allocated to the physical link may be considered, and the availability of other network resources does not need to be considered, which is beneficial to preliminarily screening the availability of the physical link through a resource allocation process, for example, performing service rate allocation, only considering whether the physical link can be used for carrying the allocated service rate, if so, considering that the physical link can be used for constituting a transmission path in a first network slice, if not, determining that the physical link cannot meet a requirement, determining a transmission path without considering the physical link, where a specific allocation manner is adjusted according to a type of the resource parameter, and this embodiment is not limited.
In addition, referring to fig. 7, in an embodiment, the step S130 in the embodiment shown in fig. 1 further includes, but is not limited to, the following steps:
step S710, under the condition that all transmission paths of the first network slice are allocated with the first network resources, allocating second network resources for the transmission paths according to the second slice allocation strategy;
step S720, determining the set of transmission paths obtained after the second network resource is allocated as a second network slice.
It should be noted that, in order to implement that the obtained network slice can satisfy the requirements in the dimensions of multiple resource attributes, the first network resource may be determined according to the first network slice, the first network slice is obtained after the allocation of the first network resource is completed, and then the second network resource is allocated to the transmission path in the first network slice according to the second slice policy. For example, a service rate is allocated to the transmission path according to the first slice allocation strategy, an available spectrum width is allocated to the transmission path based on the allocated service rate of the transmission path, and then an aggregate of the transmission paths obtained by successfully allocating the spectrum width is determined as a second network slice according to the second slice allocation strategy, so that the transmission path in the second network slice simultaneously satisfies the first slice strategy and the second slice strategy, that is, the obtained transmission path can satisfy the requirements of the user in two dimensions.
In addition, referring to fig. 8, in an embodiment, the second slice allocation policy includes a preset condition, and step S130 in the embodiment shown in fig. 1 further includes, but is not limited to, the following steps:
step S810, selecting a set of transmission paths, in which the second network resource meets the preset condition, from the first network slice to obtain a second network slice.
It should be noted that, for the network resources of the transmission path, not all of the network resources are obtained according to the available resource allocation, for example, the physical resources corresponding to each physical link, such as the transmission delay and the cost value, the physical resources depend on the physical link itself, but the physical resources can also be used for characterizing the performance of the transmission path, therefore, the second slice allocation policy may also be set to the form of the preset condition, the set of the transmission paths meeting the preset condition is screened out on the basis of obtaining the first network slice, and is used as the second network slice, for example, after determining the traffic rate of the physical link according to the first slice allocation policy and performing the allocation of the network resources such as the spectral width and the wavelength, the obtained first network slice meets the requirement on the dimension of the traffic rate, and at the same time, the physical resources of all the transmission paths can be obtained by the calculation method, for example, the transmission delays of the physical links corresponding to the transmission paths are added, the sum of the obtained transmission delays is the transmission delay of the transmission path, based on this, the second slice allocation policy may be set as a preset condition associated with the transmission delay, for example, the transmission delay is greater than a preset value, a set of transmission paths satisfying the condition that the transmission delay is greater than the preset value is screened from the first network slices, and the set is determined as the second network slice.
It can be understood that the preset condition is not limited to be used for screening physical resources, and the allocated network resources may also be screened, for example, the preset condition is set to be a specified spectrum width, and the obtained set of transmission paths is determined to be the second network slice.
It should be noted that a preset condition may also be associated with a plurality of parameters, for example, the transmission delay is set to be greater than a preset value and a specific modulation mode, and a set of transmission paths meeting the preset condition may be selected from the transmission paths of the first network slice, which is not limited in this disclosure.
In addition, referring to fig. 9, in an embodiment, the second slice allocation policy includes at least two preset conditions, and step S810 in the embodiment shown in fig. 8 further includes, but is not limited to, the following steps:
step S910, at least two second network slices are determined from the first network slice, and second network resources of the transmission path in the second network slices meet a preset condition.
Based on the discussion of the embodiment shown in fig. 8, the second network slice may be obtained from the first network slice according to the preset condition, and therefore, for practical requirements, at least two preset conditions may be set in the second slice allocation policy, and the second network slice may be in one-to-one correspondence with the preset condition, that is, a corresponding second network slice is obtained from the first network slice according to one preset condition, so that the degree of customization of the network slice is improved.
It should be noted that at least two preset conditions may correspond to different network resources, for example, the first preset condition is associated with transmission delay, the second preset condition is associated with a cost value, the second network slice whose transmission delay meets the first preset condition is selected from the first network slice, and the second network slice whose cost value meets the second preset condition is selected from the first network slice, so that the degree of customization of the network slices is higher, and different network slices can be provided according to actual requirements of different users.
In addition, referring to fig. 10, in an embodiment, the transmission path includes N types of network resources, where N is an integer greater than 2, and after the step S130 in the embodiment shown in fig. 1 is executed, the following steps are further included, but not limited to:
step S1010, an Nth network slice is determined from the Nth-1 network slice according to a preset Nth slice distribution strategy, and the Nth network resource of the transmission path in the Nth network slice accords with the Nth slice distribution strategy.
It should be noted that, in order to meet the slice customization requirement, the network slices may be further allocated from any number of dimensions, for example, on the basis of the second network slice, a third network slice is further obtained according to a third slice allocation policy until an nth network slice is obtained, where N is the number of network resources, that is, when the transmission path includes six network resources, at most a sixth network slice may be obtained, and the specific slice obtaining method may refer to the method for determining the second network slice according to the first network slice, which is not described herein again.
It can be understood that the specific value of N may be adjusted according to actual requirements, for example, according to the requirements of clients, a network slice that needs to satisfy the dimensions of five network resources is obtained according to the foregoing manner, and this embodiment does not limit the specific number of layers of the network slice.
It is to be noted that, since a network slice needs to satisfy requirements from at least two dimensions, a first network resource and a second network resource need to be different types of network resources, and when N is greater than 2, a network resource corresponding to an nth slice allocation policy may be the same as the first network resource and the second network resource, for example, the first network resource is a traffic rate, the second network resource is a transmission delay, that is, the traffic rate of the obtained second network slice satisfies a first slice allocation policy, and the transmission delay satisfies a second slice allocation policy, on this basis, a third slice allocation policy may be a network resource other than the traffic rate and the transmission delay, or the same type of network resources may be used, for example, the third slice allocation policy sets a preset condition as 10 transmission paths with the minimum transmission delay, and then the 10 transmission paths with the minimum transmission delay are screened from the second network slice, therefore, when N is greater than 2, the network resource corresponding to the nth slice allocation policy may be selected according to actual requirements, which is not limited herein.
In order to better illustrate the technical solution of the present invention, the following is illustrated as a specific example:
it should be noted that, this example is exemplified based on networking constructed by 80-wave Reconfigurable Optical Add-Drop Multiplexer (ROADM) physical nodes of a super 100G Optical transport network, and each ROADM physical node supports a super 100G technology, for example, flexible grids RSA, RWA, and modulation mode are adjustable, and meanwhile, physical links between each ROADM physical node and carried service connections are considered as bidirectional cases.
For simplicity, 3 slicing strategies are preset according to the SLA level in this example, which are:
the first slice allocation strategy comprises a diamond-level SLA service rate with 224Gb/s service rate occupied by a single physical link and a platinum-level SLA service rate with 112Gb/s service rate occupied by a single physical link;
a second slice allocation strategy, comprising diamond grade SLA time delay with a time delay value less than 10000 microseconds and platinum grade SLA time delay with a time delay value greater than or equal to 10000 microseconds;
a third slice allocation strategy comprising diamond-grade SLA costs less than or equal to 1500 of the physical path cumulative cost value and gold-grade SLA costs greater than 1500 of the physical path cumulative cost value.
Referring to fig. 11, fig. 11 is a flowchart of a network slice management method in this example, including but not limited to the following steps:
step S1110, constructing an undirected physical topology example of the super 100G optical transport network;
it should be noted that the constructed physical topology is shown in fig. 2 as an example, and includes physical nodes A, B, C, D and E, the physical links available in the physical topology are solid line portions shown in fig. 2, namely, a-B, A-C, A-D, A-E, B-D, D-E and E-C, and the transmission delay value and the cost value of each physical link are determined according to the actual link condition of each physical link.
Step S1120, virtualizing paths among all node pairs in the undirected physical topology example into direct-connected virtual links, virtualizing all physical node pairs into virtual node pairs, and constructing an OVPN topology;
it should be noted that, taking the physical topology shown in fig. 2 as an example, the constructed OVPN topology may refer to the structure shown in fig. 4, and a specific manner may refer to the description of the embodiment shown in fig. 3, which is not described herein again.
Step S1130, traversing is executed in the physical topology, and all transmission paths corresponding to each virtual link are obtained;
step S1140, according to the first slice allocation strategy, completing the allocation of physical resources in the OVPN, and determining the determined OVPN topology as a first network slice;
it should be noted that, since the first slice allocation policy is related to the traffic rate in this example, the traffic rate of each physical link may be set to a corresponding SLA level, and other network resources may be allocated according to actual selectable resources, for example, the traffic rate of the physical link is set to 224Gb/s, the traffic rate of all physical links in the first network slice is 224Gb/s, and on this basis, the wavelength, the spectrum width, and the modulation mode are allocated respectively, and then the transmission delay and the cost value of the physical link involved in the transmission path are superimposed, and the obtained OVPN topology is determined as the first network slice, and the transmission path table of the first network slice of the obtained diamond-level SLA traffic rate is shown in fig. 12. In addition, the traffic rate of the physical link can also be set to 112Gb/s according to the first slice allocation policy, and referring to the above principle, a transmission path table of the first network slice of the platinum-level SLA traffic rate can be derived as shown in fig. 13. It should be noted that if there are many actually available resources, a plurality of first network slices satisfying the same slice allocation policy may also be obtained, for example, when the traffic rate of the physical link is set to 112Gb/s according to the first slice allocation policy, in addition to the first network slice shown in fig. 13, when the resources allow, the first network slice shown in fig. 14 may also be further obtained as the transmission path table. The specific number of slices is adjusted according to the resource situation and the customer requirement, and is not limited herein.
It should be noted that, for convenience of description, in the subsequent steps, the first network slice shown in fig. 12 is further exemplified by a transmission path table, and a reference principle of corresponding operations of the remaining first network slices can be inferred, and the subsequent description is omitted.
Step S1150, on the basis of the first network slice, a second network slice is obtained according to a second slice strategy;
it should be noted that the second slice allocation strategy includes diamond-level SLA delay with a delay value less than 10000 microseconds and platinum-level SLA delay with a delay value greater than or equal to 10000 microseconds, so that the delay values corresponding to the first network slices are screened, and the transmission path less than 10000 microseconds is determined as a second network slice with diamond-level SLA delay, and the obtained transmission path table is shown in fig. 15, where the second network slice satisfies both the diamond-level SLA service rate and the diamond-level SLA delay; meanwhile, the transmission path with the time delay value greater than or equal to 10000 microseconds is used for determining platinum-level SLA time delay, the obtained transmission path table is shown in figure 16, and the second network slice not only meets the service rate of the diamond-level SLA, but also meets the time delay of the platinum-level SLA.
Step S1160, obtaining a third network slice according to a third slice strategy on the basis of the second network slice;
it should be noted that the third slice allocation strategy includes a diamond-level SLA cost of which the physical path cumulative cost value is less than or equal to 1500, and a gold-level SLA cost of which the physical path cumulative cost value is greater than 1500, so that the delay values corresponding to the second network slice corresponding to the transmission path shown in fig. 15 are screened, the transmission path of which the physical path cumulative cost value is less than or equal to 1500 is determined as a third network slice having the diamond-level SLA cost, and the obtained transmission path table is shown in fig. 17, where the third network slice respectively satisfies the diamond-level SLA service rate, the diamond-level SLA delay, and the diamond-level SLA cost; meanwhile, a transmission path with a physical path cumulative cost value less than or equal to 1500 is determined as a third network slice with a diamond-level SLA cost by screening from a delay value corresponding to a second network slice corresponding to the transmission path shown in fig. 16, and the obtained transmission path table is shown in fig. 18, where the third network slice respectively satisfies the diamond-level SLA service rate, platinum-level SLA delay and the diamond-level SLA cost; similarly, the second-level network corresponding to the transmission path shown in fig. 15 is further sliced and distributed according to the gold-level SLA cost, and the obtained transmission path table is shown in fig. 19, where the third network slice meets the diamond-level SLA service rate, the diamond-level SLA delay, and the gold-level SLA cost, respectively; similarly, the secondary network corresponding to the transmission path shown in fig. 16 is further sliced and allocated according to the gold-level SLA cost, and the obtained transmission path table is shown in fig. 20, where the third network slice meets the diamond-level SLA service rate, the platinum-level SLA delay, and the gold-level SLA cost, respectively.
And step S1170, when the slice distribution is finished according to all the slice distribution strategies, obtaining a target transmission path which accords with the at least two preset slice distribution strategies.
Fig. 21 may be referred to as slices obtained in steps S1140 to S1160, where the topology of slice 1 corresponds to the transmission path shown in fig. 12, the topology of slice 11 corresponds to the transmission path shown in fig. 15, the topology of slice 12 corresponds to the transmission path shown in fig. 16, the topology of slice 111 corresponds to the transmission path shown in fig. 17, the topology of slice 112 corresponds to the transmission path shown in fig. 18, the topology of slice 121 corresponds to the transmission path shown in fig. 19, and the topology of slice 122 corresponds to the transmission path shown in fig. 20.
In addition, referring to fig. 22, an embodiment of the present invention also provides a controller 2200, the controller 2200 including: memory 2210, processor 2220, and a computer program stored on memory 2210 and executable on processor 2220.
The processor 2220 and memory 2210 may be connected by a bus or other means.
Non-transitory software programs and instructions required to implement the network slice management method of the above-described embodiment are stored in the memory 2210, and when executed by the processor 2220, the network slice management method of the above-described embodiment is performed, for example, the method steps S100 to S300 in fig. 1, the method steps S210 to S220 in fig. 3, the method steps S310 to S320 in fig. 5, and the method steps S1110 to S1170 in fig. 11 described above are performed.
The above-described embodiments of the apparatus are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may also be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Furthermore, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions, which are executed by a processor 2220 or a controller 2200, for example, by a processor 2220 in the above-mentioned controller 2200 embodiment, so that the above-mentioned processor 2220 executes the network slice management method in the above-mentioned embodiment, for example, execute the above-mentioned method steps S110 to S130 in fig. 1, the method steps S310 to S330 in fig. 3, the method steps S310 to S330 in fig. 5, the method steps S610 to S630 in fig. 6, the method steps S710 to S720 in fig. 7, the method step S810 in fig. 8, the method step S910 in fig. 9, the method step S1010 in fig. 10, and the method steps S to S1170 in fig. 11. One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.
Claims (10)
1. A network slice management method, comprising:
acquiring all node pairs in a network topology, and determining all transmission paths corresponding to each node pair;
allocating a first network resource to the transmission path according to a preset first slice allocation strategy, and determining a set of the transmission paths obtained after the first network resource is allocated as a first network slice;
and determining a second network slice from the first network slice according to a preset second slice allocation strategy, wherein a transmission path in the second network slice is allocated with a second network resource which accords with the second slice allocation strategy.
2. The method of claim 1, wherein the determining all transmission paths corresponding to each node pair comprises:
generating an Optical Virtual Private Network (OVPN) according to all the node pairs;
determining a virtual link corresponding to each node pair in the OVPN;
and determining all transmission paths corresponding to each node pair according to the determined virtual links.
3. The method of claim 2, wherein determining all transmission paths corresponding to each node pair according to the determined virtual links comprises:
determining physical links available in the network topology;
determining all physical paths corresponding to each virtual link according to the physical links, wherein each physical path consists of a plurality of physical links;
and determining all physical paths corresponding to the virtual links as all transmission paths corresponding to each node pair.
4. The method of claim 3, wherein the allocating the first network resources for the transmission path according to a preset first slice allocation policy comprises:
determining a resource parameter according to a preset first slice allocation strategy;
allocating the resource parameters for the physical link;
obtaining the transmission path allocated with the first network resource according to the physical link allocated with the resource parameter, wherein the first network resource comprises the resource parameter.
5. The method according to any one of claims 1 to 4, wherein the determining a second network slice from the first network slices according to a preset second slice allocation policy comprises:
under the condition that all transmission paths of the first network slice are allocated with first network resources, allocating second network resources for the transmission paths according to a second slice allocation strategy;
and determining the set of transmission paths obtained after the second network resources are allocated as a second network slice.
6. The method according to any one of claims 1 to 4, wherein the second slice allocation policy includes a preset condition, and the determining a second network slice from the first network slices according to the preset second slice allocation policy comprises:
and selecting a set of transmission paths of which the second network resources meet the preset conditions from the first network slice to obtain a second network slice.
7. The method of claim 6, wherein the second slice allocation policy comprises at least two preset conditions, and wherein determining the second network slice from the first network slice according to the preset second slice allocation policy comprises:
and selecting at least two sets of transmission paths of which the second network resources meet the preset conditions from the first network slices to obtain at least two second network slices.
8. The method of claim 1, wherein the transmission path comprises N network resources, where N is an integer greater than 2, and wherein after the determining a second network slice from the first network slice according to a preset second slice allocation policy, the method further comprises:
and determining an Nth network slice from the N-1 th network slice according to a preset Nth slice distribution strategy, wherein the Nth network resource of the transmission path in the Nth network slice accords with the Nth slice distribution strategy.
9. A controller, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the network slice management method according to any of claims 1 to 8 when executing the computer program.
10. A computer-readable storage medium storing computer-executable instructions for performing the network slice management method of any one of claims 1 to 8.
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| CN202011355495.1A CN114567826A (en) | 2020-11-27 | 2020-11-27 | Network slice management method, controller and computer readable storage medium |
| PCT/CN2021/118843 WO2022110992A1 (en) | 2020-11-27 | 2021-09-16 | Network slice management method, controller, and computer readable storage medium |
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| CN110391920B (en) * | 2018-04-16 | 2022-04-26 | 中兴通讯股份有限公司 | Network slice management method, device and equipment |
| CN110855542B (en) * | 2018-08-20 | 2021-12-21 | 中国电信股份有限公司 | Management method, system and device for transmission network slice |
| CN111225419B (en) * | 2018-11-23 | 2023-04-18 | 中兴通讯股份有限公司 | Method, device and controller for realizing network slicing |
| WO2020185794A1 (en) * | 2019-03-11 | 2020-09-17 | Intel Corporation | Multi-slice support for mec-enabled 5g deployments |
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