CN112825502A - Network slice creation method, basic network controller, system, and storage medium - Google Patents
Network slice creation method, basic network controller, system, and storage medium Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
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- H04L41/342—Signalling channels for network management communication between virtual entities, e.g. orchestrators, SDN or NFV entities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/40—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks using virtualisation of network functions or resources, e.g. SDN or NFV entities
Abstract
The embodiment of the invention discloses a network slice creating method, a basic network controller, a system and a storage medium. The method comprises the following steps: analyzing the user network slice data to obtain link topology data of the user network slice data in a plurality of different types of networks of a bearer network, wherein the link topology data comprises splicing nodes among the plurality of different types of networks, and the splicing nodes are used for connecting the plurality of different types of networks; carrying out network configuration on link topology data in a plurality of different types of networks to obtain connection configuration information of each type of network; network slices of user network slice data in each type network are created using the connection configuration information for each type network.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a network slice creating method, a basic network controller, a system and a storage medium.
Background
A fifth Generation Mobile communication technology (5G) bearer network is a basic network that provides network connection for a 5G radio access network and a core network, and provides functions of flexible scheduling, networking protection, and management control for the network connection.
The 5G carrier network supports the network slicing service capability, and the network slicing divides the existing physical network to form a plurality of independent logic networks, so that customized service is provided for differentiated services. The network slice relates to a terminal, a radio access network, a bearer network and a core network, and needs to realize end-to-end cooperative management and control.
In an actual application scenario, a network slice required by a user in a bearer environment may span underlying bearer networks of multiple different technologies, and a common method for creating a network slice is to provide a slice of the same network technology through a virtualization method, and cannot provide a network slice that can traverse underlying bearer networks of different network technologies.
Disclosure of Invention
Embodiments of the present invention provide a network slice creation method, a basic network controller, a system, and a storage medium, which can provide a user network slice in a heterogeneous bearer network environment using different technologies for bottom bearer.
In a first aspect, an embodiment of the present invention provides a method for creating a network slice, where the method includes: analyzing the user network slice data to obtain link topology data of the user network slice data in a plurality of different types of networks of a bearer network, wherein the link topology data comprises splicing nodes among the plurality of different types of networks, and the splicing nodes are used for connecting the plurality of different types of networks; carrying out network configuration on link topology data in a plurality of different types of networks to obtain connection configuration information of each type of network; network slices of user network slice data in each type network are created using the connection configuration information for each type network.
In a second aspect, an embodiment of the present invention provides a base network controller, including: the network analysis module is configured to analyze the user network slice data in the bearer network to obtain link topology data of the user network slice data in a plurality of different types of networks of the bearer network, wherein the link topology data comprises splicing nodes among the plurality of different types of networks, and the splicing nodes are used for connecting the plurality of different types of networks; the network configuration module is configured to perform network configuration on link topology data in a plurality of different types of networks to obtain connection configuration information of each type of network; and the slice creating module is configured to create the network slice of the user network slice data in each type network by using the connection configuration information of each type network.
In a third aspect, an embodiment of the present invention provides a network management system, including an orchestrator and a base network controller, where the base network controller is configured to receive user network slice data from the orchestrator, and execute the above-mentioned network slice creation method
In a fourth aspect, an embodiment of the present invention provides a network slice creating system, including: a memory and a processor; the memory is used for storing programs; the processor is configured to read executable program code stored in the memory to perform the network slice creation method described above.
In a fifth aspect, the present invention provides a computer-readable storage medium, in which instructions are stored, and when the instructions are executed on a computer, the instructions cause the computer to execute the network slice creation method of the above aspects.
According to the network slice creation method, the basic network controller, the system and the storage medium, the user network slice can be created under the heterogeneous bearer network environment supporting different types of networks, so that the technical advantages of the bearer network in key characteristics such as low time delay, large bandwidth and the like are fully utilized.
Drawings
The accompanying drawings, which 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 description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a schematic architecture diagram of an infrastructure network controller according to an embodiment of the present invention.
Fig. 2 is a flowchart illustrating a user network slice creation method according to an embodiment of the present invention.
Fig. 3 shows a network scenario diagram according to an embodiment of the invention.
Fig. 4 is a flowchart illustrating a network slice creation method according to another embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a basic network controller according to an embodiment of the present invention.
FIG. 6 illustrates a block diagram of an exemplary hardware architecture of a computing device in which methods and apparatus according to embodiments of the invention may be implemented.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the embodiment of the invention, the network slice is a networking mode according to needs, a plurality of virtual end-to-end networks can be separated on the unified infrastructure of an operator, and each network slice can be logically isolated on a wireless access network, a bearer network and a core network so as to adapt to various types of network applications. That is, a network slice may form an end-to-end logical network, flexibly providing one or more network services according to the needs of the slice demander.
In one embodiment, the Network slice separates hardware and software parts from a conventional Network by using a Network Function Virtualization (NFV) technology, so that the Network slice meets various Network environment requirements and meets the requirement of flexibly assembling Network services. Network function virtualization may include, for example, Virtual Local Area Network (VLAN), Virtual Private Network (VPN), and Virtual Reality (VR).
In the embodiment of the invention, the bearer network is an underlying network for providing network connection between the radio access network and the core network. In practical deployment, the bearer Network may be a Heterogeneous Network (HetNets) including different types of networks. The heterogeneous network can be formed by splicing different types of networks and can provide different types of network services. For example, a heterogeneous network may contain different types of network devices and associated application systems to meet different traffic demands of network terminals.
In one embodiment, the construction of the bearer network may be done based on different network technologies. For example, the Network may be constructed based on a flexible Ethernet (FlexE) technology, a microwave transmission technology, an Internet Protocol (IP) technology, an Optical Transport Network (OTN) technology, and other Network technologies. When a bearer network is constructed using multiple network technologies, a bearer network comprising multiple different types of networks results.
From the technical point of view adopted by the bearer network, there are various ways of providing network slices, for example, network slices of different service types may be provided from different dimensions such as a technical type of the network slice, a switching type, a management control system operation isolation way, a resource providing way of the network slice, and the like.
At the user plane, the slice network may include type I and type II implementations. In type I, client layer network management may not care about the implementation of the service layer bearer network, and may map directly to the user network slice through VPN; in type II, a network slice may have its own corresponding logical slice in the basic bearer network, and a user may perform configuration management on nodes and links in the allocated logical slice.
In one embodiment, the 5G traffic types may include: the method includes the steps that multiple slice service types such as Ultra Reliable and Low Latency Communication (urlcc), enhanced Mobile Broadband (eMBB), Massive Machine Type Communication (mtc) and the like can be carried in each slice, a carrying network serves as a service layer network, and application requirements of the multiple slice service types can be met through implementation methods of the slice networks in types I and II.
In some application scenarios, the method for providing the network slice service based on the bearer network is generally based on the same type of network in the bearer network, that is, the virtual network slices of the same technology are provided in the original network hierarchy by different virtualization methods.
In an embodiment of the present invention, if a 5G bearer Network is based on a Software Defined Network (SDN), the underlying bearer Network may include different types of networks using a plurality of different types of Network technologies. That is, when an end-to-end network slice required by a network user spans heterogeneous bearer networks formed by a plurality of different types of networks, it is necessary to provide an end-to-end user network slice in the heterogeneous bearer networks.
For simplicity of description, the embodiments described herein below use FlexE and OTN as examples to illustrate how to create user network slices in heterogeneous bearer networks. This description is not to be construed as limiting the scope or implementation possibilities of the present solution, and the processing methods of other network technologies than FlexE and OTN are consistent with the processing methods based on FlexE and OTN.
Fig. 1 is a schematic architecture diagram of an infrastructure network controller according to an embodiment of the present invention.
As shown in fig. 1, the architecture may include: a subscriber network slice management module 110, network function modules of different types of networks, such as a-type network function module 120 of a-type network and a network function module 130 of B-type network. In fig. 1, the a-type network function module 120 and the B-type network function module 130 may be connected to the user slice network manager 110 in an embedded or external manner. The type a network and the type B network represent different types of networks in heterogeneous bearer networks, such as any two of a FlexE-based bearer network, an OTN-based bearer network, a microwave bearer network, and an IP bearer network.
In an embodiment, the user network slice management module 101 is configured to receive user network slice data from an upper entity in a software defined network through a northbound interface, and perform topology analysis on the received user network slice data to obtain link topology data distributed in a class a network and link topology data distributed in a class B network; the a-type network function module 120 is configured to perform topology calculation and network configuration on the link topology data of the a-type network to obtain network connection configuration information of the a-type network; the class B network function module 130 is configured to perform topology calculation and network configuration on the link topology data of the class B network to obtain network connection configuration information of the class B network; the user network slice management module 101 is further configured to send the network connection configuration information of the class a network and the network connection configuration information of the class B network to an upper entity through a northbound interface. The upper layer entity can create the slices of the user network slice data in different types of networks and form the network slices of the user network slice data crossing the heterogeneous bearer network by using the slices in the different types of networks.
The northbound interface is an interface between the user network slice management module 101 and an upper layer entity, and the northbound interface can perform data access based on the restconf protocol. In the embodiment of the present invention, the restconf Protocol may provide a programming interface of a HyperText Transfer Protocol (HTTP).
The southbound interface is a technical means for realizing communication interaction between a basic network controller and underlying network equipment in an SDN environment, and adopts a programmable interface to send an instruction to the underlying equipment through the basic network controller so as to collect topology data and resource data in a network, and manage resources and configure services.
In one embodiment, the southbound interface may include, depending on the network protocol used: the Network configuration Protocol based interface includes an interface based on a Network configuration netconf Protocol, an interface based on a Simple Network Management Protocol (SNMP) and an interface based on an open Protocol openflow Protocol. The southbound interface may also include a command line interface, which may be a text-based configuration utility, that supports the configuration and management of accessed network devices by entering keyboard commands and parameters.
It should be understood that the number of network function modules and the number of southbound interfaces for the different types of networks in fig. 1 are merely illustrative. According to the actual application needs, can carry out nimble adjustment. The configuration can be flexibly configured according to the requirements, and the content in the aspect is not limited.
Fig. 2 is a flowchart illustrating a user network slice creation method according to an embodiment of the present invention. As shown in fig. 2, the method includes the following steps S210-S230.
S210, analyzing the user network slice data to obtain link topology data of the user network slice data in a plurality of different types of networks of the bearer network, wherein the link topology data comprises splicing nodes among the plurality of different types of networks, and the splicing nodes are used for connecting the plurality of different types of networks.
S220, network configuration is carried out on the link topology data in a plurality of different types of networks, and connection configuration information of each type of network is obtained.
And S230, creating a network slice of the user network slice data in each type network by using the connection configuration information of each type network.
In one embodiment, the plurality of different types of networks in step S210 may include: the plurality of different types of networks includes at least two different types of networks among a microwave bearer network, an IP bearer network, an optical transport network-based bearer network, and a flexible ethernet-based bearer network.
In one embodiment, before step S210, the method may further include: user network slice data from the orchestrator received through a northbound interface. In this embodiment, the orchestrator may send the user network slice data defined by the unified data modeling language to the underlying network controller using a northbound interface through the underlying network controller.
The unified coding language in the embodiment of the present invention may be a Next Generation data modeling language (YANG) model language, and the YANG model language is a data modeling language, and may be used to model data operated by a NETCONF protocol, for example, to model configuration data and status data of a NETCONF protocol, a NETCONF remote invocation, and a NETCONF notification operation. The modeling process includes, for example: the syntactic and semantic relations of the YANG model are utilized to provide a self-defined data expression mode for the configuration data and the state data.
In the embodiment of the present invention, the underlying network controller and the orchestrator can use a YANG model language to model the data to be processed, and convert the configuration data to be processed into the data types and data structures specified by the YANG model language without changing the data content. The method of defining data and manipulating data may be kept consistent and uniform across different types of networks using a uniform coding language.
According to the network slice creating method provided by the embodiment of the invention, the user network slice can be created in a heterogeneous bearer network environment supporting different types of networks, and cross-layer cooperation of a slice network to a bottom bearer network is realized in the heterogeneous bearer network, so that the technical advantages of the bearer network in key characteristics such as low time delay, large bandwidth and the like are fully utilized.
In one embodiment, the step S210 may include steps S211-S213.
S211, dividing the user network slice data into slice data groups of each type network by using the splicing nodes among a plurality of different types of networks.
S212, carrying out topology analysis on the slice data packet of each type network to obtain link topology data of each type network.
In this embodiment, the basic network controller may receive the user network slice data through the northbound interface, analyze the topology data packets distributed in multiple different types of networks in the underlying bearer network, and generate the link topology of each set of topology data in the corresponding network.
In the above step S211, the splicing node is a node that can establish a connection between any different networks of a plurality of different types. Therefore, in order to ensure that different types of networks in the heterogeneous bearer network cooperate to provide the sliced network service, the splicing nodes between the networks need to be acquired when the user network sliced data is analyzed.
In step S212, the user network slice management module may map the user network slice data to different types of networks in the bearer network through topology resolution, so as to obtain a link topology of each type of network in a topology data packet in a plurality of different types of networks.
In this embodiment, the step S220 may specifically include the following steps S221 and S222.
S221, performing path calculation on the link topology data of each type network by using the topology data and the resource data of each type network collected in advance to obtain available path data and resource allocation data of each type network.
S222, according to the available path data and the resource allocation data, network configuration is carried out on the network equipment corresponding to each type of network, and connection configuration information of each type of network is obtained.
In one embodiment, step S221 may include S221-01 and S221-02.
S221-01, generating path calculation request data according to preset interface definition information, wherein the interface definition information is used for defining interfaces among a plurality of different types of networks.
S221-02, path calculation and resource allocation are carried out on the path calculation request data by utilizing the topology data and the resource data which are collected in advance, and available path data and resource allocation data of each type of network are obtained.
In step S221-01, the interface definition information at least includes: network slice identification, link definition information, path creation time, and path maintenance time in each type of network. Further, the interface definition information may further include information items such as a protection switching attribute, links having a specified Shared Risk Link Group (SRLG) value that need to be excluded in each type of network, and the like.
In one embodiment, the link definition information in the interface definition information may include: the head end of the link, the tail end of the link, Tailend, the Bandwidth Bandwidth of the link, the maximum delay of the link and other information. Further, the connection attribute information may further include: the node required to be included in the corresponding type network, the node required to be excluded in the corresponding type network, the minimum delay of the link and other information items.
In one embodiment, step S222 may include S222-01-S222-03.
S222-01, according to the network equipment corresponding to each type network, determining the configuration parameters defined by the preset data modeling language corresponding to the network equipment.
S222-02, according to the available path data and the resource allocation data, network configuration is carried out on the network equipment corresponding to each type of network, and a configuration value of the configuration parameter is obtained.
S222-03, configuring the configuration values of the configuration parameters to the corresponding network equipment to obtain the connection configuration information of each type of network.
In this embodiment, the configuration models of the network devices corresponding to different types of networks are different. The configuration model of the network device may be used to configure and deploy the network device. In addition, the data modeling language does not change the configuration content of the network device, but the configuration content of different network devices needs to be converted into a format passing through the YANG model language to obtain the configuration data defined by the YANG model language.
In one embodiment, after configuring the configuration values of the configuration parameters to the corresponding network devices, the connection configuration information of each type of network may be sent to the base network controller, and returned to the upper layer entity through the northbound interface of the base network controller.
The network slice creating method can be applied to a 5G carrier network, the carrier network is a heterogeneous environment formed by various networks of different types, the wireless user defines the network slice to be submitted to the carrier network, and under the condition that the network slice passes through different carrier networks, the basic network controller is used for coordinating different types of networks to obtain the network slice of user network slice data in each type of network, so that the end-to-end user network slice under the heterogeneous carrier network environment is realized.
Fig. 3 is a schematic diagram of a network scenario according to an embodiment of the present invention, and the same numbers in fig. 3 and fig. 1 may represent the same or equivalent structures. As shown in fig. 3, this embodiment may describe a process of implementing user network slicing by using a base network controller in conjunction with heterogeneous network scenarios of a FlexE-based bearer network and an OTN-based bearer network in a 5G bearer network.
In the 5G bearing network, a basic network controller and a composer can be deployed, and a class A network function module based on the Flexe technology and a class B network function module based on the OTN/DWDM technology can be arranged in the basic network controller.
In practical applications, a plurality of implementation manners are deployed for components of network function modules based on different technologies, for example, the network function module of each technology may be integrated inside the basic network controller as a component of the basic network controller, or may be external to the basic network controller.
Assume that a class a network based on the FlexE technology includes three physical nodes A, B, M and FlexE line connections between nodes in the class a network, and a class B network based on the OTN technology includes three physical nodes M, C, Z and OTN line connections between nodes in the class B network.
As shown in fig. 3, the class a network function module 120 may include a class a network topology unit 121, a class a network path computation and resource allocation unit 122, and a class a L2 network configuration unit 123; the class B network function module 130 may include a class B network topology unit 131, a class B network path computation and resource allocation unit 132, and a class B network configuration unit 133.
As shown in S0a and S0B in fig. 3, the base network controller may collect topology data and resource data of the class a network and topology data and resource data of the class B network in advance using the class a network topology unit 121 and the class B network topology unit 131.
As shown in S1 in fig. 3, the user slice network manager 110 receives the user network slice data sent by the orchestrator through the northbound interface. The user slice network management 110 maps the user network slice data to different types of networks in the underlying carrier network to obtain actual user network slice topologies in the different types of networks.
Illustratively, as shown in fig. 3, the user network of device nodes a 'to Z' may be defined in the user network slice data, the network slice spanning both the FlexE-based a-type network and the OTN/DWDM-based B-type network. When the user network slice topology is determined, nodes M' corresponding to splicing points M between different types of networks are selected, and the splicing points M are used for connecting the type A network and the type B network.
Through topology resolution, the determination of the actual user network slice topology may include: node a ', node M ', node Z ', a connection attribute parameter (Link1 connection attribute parameter) between node a ' and node M ', a connection attribute parameter (Link2 connection attribute parameter) of connection uL2 between node M ' and node Z ', where connection uL1 is a connection in an a-type network and connection uL2 is a connection in a B-type network.
In one embodiment, the orchestrator sends user network slice data to user slice network management 110, which may include, for example: { A ', M ', Z ', uL1(A ', M ', Link1 attribute parameters), uL2(M ', Z ', Link2 attribute parameters) }.
The topology analysis of the user slice network management 110 on the user network slice data packet to obtain link topology data in different types of networks may include: in the type A network, a node A corresponding to a node A ', a node M corresponding to a node M', and a Path attribute parameter (Path1 Path attribute parameter) between the node A and the node M; in the B-type network, a node M corresponding to the node M ', a node Z corresponding to the node Z', and a Path attribute parameter (Path2 Path attribute parameter) between the node M and the node Z.
Illustratively, the link topology data in type a networks and type B networks includes: { A, M, Flexe path1(A, M, Path1 path attribute parameters) }, OTN network mapping { M, Z, OTN path1(M, Z, Path2 path attribute parameters) }.
As shown in S2a and S2b in fig. 3, the subscriber network slice management module 110 generates path calculation request data corresponding to different types of networks according to the link topology data obtained by the topology analysis, and sends the path calculation data corresponding to different types of networks to the network path calculation and resource allocation units of corresponding types. At this time, the user network slice management module may enter a wait state.
As shown in S3a and S3b in fig. 3, the a-type network path computation and resource allocation unit 122 performs path computation according to the received path computation request corresponding to the link topology data in the a-type network and according to the topology data of the a-type network and the resource database that are collected in advance by the a-type network topology unit 121, to obtain the available path and resource allocation information in the a-type network; the B-type network path calculating and resource allocating unit 132 may perform path calculation according to the received path calculation request corresponding to the link topology data in the B-type network and according to the topology data of the B-type network and the resource database collected in advance by the B-type network topology unit 131, so as to obtain the available path and resource allocation information in the B-type network.
As shown in S4a and S4b in fig. 3, the class a network configuration unit 123 may generate YANG model configuration data of relevant nodes in available paths in the class a network by using the received available paths and resource allocation information in the class a network; the B-type network configuration unit 133 may generate YANG model configuration data of relevant nodes in the available paths in the B-type network by using the received available paths and resource allocation information in the B-type network.
Taking the class a network as an example, after receiving the calculation request data, the class a network path calculation and resource allocation unit 122 performs path calculation according to the topology data of the class a L2 network and the resource database, which are collected in advance by the class a network topology unit 121, and if the path calculation is successful, generates the result data in the class a network by using { A, B, M } nodes and path configuration parameters based on the flexible ethernet technology corresponding to the nodes. Similar to the processing procedure in the class a network, the { M, C, Z } node in the class B network and the path configuration parameter generation based on the optical transport network technology corresponding to each node can be obtained.
In one embodiment, when the a-type network is a network based on a FlexE technology, relevant configurations and parameters such as FlexE crossover are configured when a source node to a destination node in the a-type network may be endpoints of shim-to-shim connection based on the FlexE technology. In the flexible ethernet technology FlexE, data of a plurality of data interfaces can be scheduled and distributed to a plurality of different subchannels in a time slot manner through a flexible ethernet gasket (FlexE Shim) technology based on a time division multiplexing distribution mechanism and a time slot crossing technology, so that data stream forwarding based on a physical layer is realized.
In this embodiment, each type of network configuration unit may generate network connection configuration information of the network device according to the corresponding network device.
As an example, the class a network configuration unit 123 may define and assemble FlexE technology-based configurations of device nodes in the class a network by using a YANG model language, obtain FlexE technology-based YANG model configuration parameters of the device nodes in the class a network, and send the YANG model configuration parameters to the network devices in the class a network through a southbound interface for configuration.
As an example, the class B network configuration unit 133 may define and assemble OTN technology-based configuration of network devices in the type B network by using a YANG model language, obtain YANG model configuration parameters of the OTN technology-based device nodes in the type B network, and send the YANG model configuration parameters to the network devices in the type B network through a southbound interface for configuration.
As shown in S5a and S5B of fig. 3, the class a network configuration unit 123 may return network connection configuration information of the type a network to the user network slice management module 110, and the class B network configuration unit 133 may return network connection configuration information of the type B network to the user network slice management module 110.
In this embodiment, as shown in S6 in fig. 3, after receiving the network connection configuration information in the different types of networks, the user network slice management module may determine that the connection creation in each type of network is successful, that is, may determine that the user slice network creation is successful. The user network slice management module 110 records and stores the connection configuration information and status data in each type of network, and returns the connection configuration information and slice network creation success notification message in each type of network to the orchestrator through the northbound interface.
According to the user network slice creating method provided by the embodiment of the invention, the basic network controller utilizes splicing nodes among different types of networks to carry out connection according to the user network connection requirements of user network topology distribution in each type of network, and forms a user bearer network passing through a bottom heterogeneous bearer network in a cooperative mode between the user network and the different types of networks, so as to obtain the user network slice in the heterogeneous bearer network.
The technical scheme of the invention can break through the technical limit of providing the same type of network slices generally, can provide end-to-end user network slices on heterogeneous bearer networks composed of different types of networks, and the different types of networks can be adapted and expanded according to the invention, thereby realizing the end-to-end user slice network service provision of the heterogeneous bearer networks, shielding the diversity of the bottom bearer network for the upper layer user network, achieving the purpose of decoupling, and fully utilizing the characteristics of the networks to ensure the key characteristics of bandwidth, time delay and the like required by the user networks.
Fig. 4 is a flowchart illustrating a network slice creation method according to another embodiment of the present invention. As shown in fig. 4, the network slice creation method may include the following steps.
As shown in step (r) in fig. 4, the orchestrator issues the user network slice data to the basic network controller.
As shown in the steps of the second step and the third step in fig. 4, after receiving the user network slice data, the user network slice management module analyzes the user defined network slice and the bottom layer bearing network, and when the user network slice topology spans two types of networks, the user network topology data packets corresponding to the different types of networks and the topology links corresponding to the different types of networks are arranged by taking the splicing nodes between the different types of networks as boundaries.
In this step, the topology calculation request data in each type of network is assembled using the uniform interface definition information, and a cooperative request message or a call process is initiated to a path calculation module of the corresponding network, entering a waiting state.
As shown in the third step a and the third step b in fig. 4, after receiving the corresponding path computation request message or call, the network path computation and resource allocation unit performs path computation according to the prepared network topology and resource data. If the failure occurs, the information is directly returned to the user network slice management module; if the path data and the resource distribution data are successful, the calculated path data and the resource distribution data are sent to a network configuration module in the corresponding type network.
As shown in steps (a) and (b) in fig. 4, after receiving the path data and the resource allocation data thereof, the network configuration unit assembles configuration data based on the YANG model language of the path-related node according to the configuration model of the corresponding network device, and issues the configuration data to the device through a southbound interface such as an interface based on the netconf protocol.
In this step, as shown in the diagram steps fifthla and fifthlb, if the configuration data is successfully assembled, the configuration data is directly returned to the user network slice management module; and if the configuration data fails to be assembled, returning the configuration data to the path calculation module.
As shown in step (sixthly) in fig. 4, after the network configuration of all the user network slice data in different types of networks is completed, the user network slice management module may collect and store node and link data and state data in different types of networks, return the data to the orchestrator, and create network slices of the user network slice data in different types of electrical layers.
By the technical scheme of the invention, the end-to-end user network slices can be provided on different types of networks, the end-to-end user slice network service of the heterogeneous bearer network is provided, the diversity of the underlying bearer network is shielded for the upper layer user network, and the decoupling purpose is achieved. The limitation of the traditional method for providing network slices in the same type of network is broken through, so that the key characteristics such as bandwidth and time delay required by a user network are ensured by utilizing the characteristics of the network.
The following describes a basic network controller according to an embodiment of the present invention in detail with reference to the accompanying drawings. Fig. 5 is a schematic structural diagram of a basic network controller according to an embodiment of the present invention. As shown in fig. 5, the base network controller 500 may include: a network parsing module 510, a network configuration module 520, and a slice creation module 530.
The network parsing module 510 is configured to parse the user network slice data to obtain link topology data of the user network slice data in a plurality of different types of networks of the bearer network, where the link topology data includes a plurality of splicing nodes between the different types of networks, and the splicing nodes are used to connect the plurality of different types of networks.
The network configuration module 520 is configured to perform network configuration on the link topology data in a plurality of different types of networks to obtain connection configuration information of each type of network.
A slice creation module 530 configured to create a network slice of the user network slice data in each type network using the connection configuration information of each type network.
In one embodiment, the plurality of different types of networks includes at least two different types of networks among a microwave bearer network, an IP bearer network, an optical transport network-based bearer network, and a flexible ethernet-based bearer network.
In one embodiment, the network resolution module 510 may include: the data grouping unit is configured to divide the user network slice data into slice data groups of each type of network by utilizing splicing nodes among a plurality of different types of networks; and the topology analysis unit is configured to perform topology analysis on the slice data packets of each type of network to obtain link topology data of each type of network.
In one embodiment, the network configuration module 520 may include: the path calculation unit is configured to perform path calculation on the link topology data of each type of network by using the pre-collected topology data and resource data of each type of network to obtain available path data and resource allocation data of each type of network; the network configuration module 520 is further configured to perform network configuration on the network device corresponding to each type of network according to the available path data and the resource allocation data, so as to obtain connection configuration information of each type of network.
In one embodiment, the interface definition information includes at least: network slice identification, connection attribute information, path creation time and path maintenance time in each type of network; the connection attribute information includes at least: source node, destination node, link frequency bandwidth, link maximum delay in each type of network.
In an embodiment, the path calculation unit may be further configured to define link creation parameters between different types of electrical layers according to a preset interface definition rule; and according to the network topology data and the electrical layer resource data, performing path calculation on the link topology data to obtain available path data and resource allocation data corresponding to the link creation parameters.
In one embodiment, the network configuration module 520 may further include: the model language definition unit is configured to determine configuration parameters defined by a preset data modeling language corresponding to the network equipment according to the network equipment corresponding to each type network; the configuration parameter determining unit is configured to perform network configuration on the network equipment corresponding to each type of network according to the available path data and the resource allocation data to obtain a configuration value of the configuration parameter; and the configuration issuing unit is configured to configure the configuration values of the configuration parameters to the corresponding network equipment to obtain the connection configuration information of each type of network.
According to the basic network controller provided by the embodiment of the invention, the user network slice can be created under the heterogeneous bearer network environment supporting different types of network composition. The cross-layer cooperation of the slice network to the underlying bearer network is realized in the heterogeneous bearer network, so that the technical advantages of the network in key characteristics such as low time delay, large bandwidth and the like are fully utilized.
It is to be understood that the invention is not limited to the particular arrangements and instrumentality described in the above embodiments and shown in the drawings. For convenience and brevity of description, detailed description of a known method is omitted here, and for the specific working processes of the system, the module and the unit described above, reference may be made to corresponding processes in the foregoing method embodiments, which are not described herein again.
Fig. 6 is a block diagram illustrating an exemplary hardware architecture of a computing device capable of implementing the network slice creation method and apparatus according to embodiments of the present invention.
As shown in fig. 6, computing device 600 includes an input device 601, an input interface 602, a central processor 603, a memory 604, an output interface 605, and an output device 606. The input interface 602, the central processing unit 603, the memory 604, and the output interface 605 are connected to each other via a bus 610, and the input device 601 and the output device 606 are connected to the bus 610 via the input interface 602 and the output interface 605, respectively, and further connected to other components of the computing device 600.
Specifically, the input device 601 receives input information from the outside (e.g., an organizer), and transmits the input information to the central processor 603 through the input interface 602; the central processor 603 processes input information based on computer-executable instructions stored in the memory 604 to generate output information, stores the output information temporarily or permanently in the memory 604, and then transmits the output information to the output device 606 through the output interface 605; output device 606 outputs output information to the exterior of computing device 600 for use by a user.
In one embodiment, computing device 600 shown in fig. 6 may be implemented as a network slice creation system that may include: a memory configured to store a program; a processor configured to execute a program stored in the memory to perform the network slice creation method described in the above embodiments.
The embodiment of the invention also provides a network management system, which comprises an orchestrator and a basic network controller, wherein the basic network controller is configured to receive the user network slice data from the orchestrator and execute the network slice creation method described in the embodiment.
According to an embodiment of the invention, the process described above with reference to the flow chart may be implemented as a computer software program. For example, embodiments of the invention include a computer program product comprising a computer program tangibly embodied on a machine-readable medium, the computer program comprising program code for performing the method illustrated in the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network, and/or installed from a removable storage medium.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. 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 of ordinary skill 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.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (11)
1. A network slice creation method, comprising:
analyzing user network slice data to obtain link topology data of the user network slice data in a plurality of different types of networks of a bearer network, wherein the link topology data comprises splicing nodes among the plurality of different types of networks, and the splicing nodes are used for connecting the plurality of different types of networks;
performing network configuration on the link topology data in the plurality of different types of networks to obtain connection configuration information of each type of network;
and creating a network slice of the user network slice data in each type network by using the connection configuration information of each type network.
2. The method of claim 1, wherein,
the plurality of different types of networks includes at least two different types of networks among a microwave bearer network, an IP bearer network, an optical transport network-based bearer network, and a flexible ethernet-based bearer network.
3. The method of claim 1, wherein the parsing the user network slice data in the carrier network to obtain link topology data of the user network slice data in a plurality of different types of networks of the carrier network comprises:
dividing the user network slice data into slice data groups of each type network by using the splicing nodes among the plurality of different types of networks;
and carrying out topology analysis on the slice data packet of each type of network to obtain link topology data of each type of network.
4. The method of claim 1, wherein the network configuring the link topology data in the plurality of different types of networks to obtain connection configuration information for each type of network comprises:
performing path calculation on the link topology data of each type of network by using the pre-collected topology data and resource data of each type of network to obtain available path data and resource allocation data of each type of network;
and performing network configuration on the network equipment corresponding to each type of network according to the available path data and the resource allocation data to obtain the connection configuration information of each type of network.
5. The method according to claim 4, wherein the performing path computation on the link topology data of each type of network by using the topology data and the resource data of each type of network collected in advance to obtain the available path data and the resource allocation data of each type of network comprises:
generating path calculation request data according to preset interface definition information, wherein the interface definition information is used for defining interfaces among the multiple different types of networks;
and performing path calculation and resource allocation on the path calculation request data by using the topology data and the resource data which are collected in advance to obtain available path data and resource allocation data of each type of network.
6. The method of claim 5, wherein,
the interface definition information includes at least: network slice identification, connection attribute information, path creation time and path maintenance time in each type of network;
the connection attribute information includes at least: and the source node, the destination node, the link frequency bandwidth and the link maximum delay in each type of network.
7. The method according to claim 4, wherein the performing network configuration on the network device corresponding to each type of network according to the available path data and the resource allocation data to obtain connection configuration information of each type of network includes:
determining configuration parameters defined by a preset data modeling language corresponding to the network equipment according to the network equipment corresponding to each type network;
according to the available path data and the resource allocation data, network configuration is carried out on the network equipment corresponding to each type of network, and a configuration value of a configuration parameter is obtained;
and configuring the configuration values of the configuration parameters to the corresponding network equipment to obtain the connection configuration information of each type of network.
8. An infrastructure network controller comprising:
the network analysis module is configured to analyze user network slice data in a bearer network to obtain link topology data of the user network slice data in a plurality of different types of networks of the bearer network, wherein the link topology data comprises splicing nodes among the plurality of different types of networks, and the splicing nodes are used for connecting the plurality of different types of networks;
the network configuration module is configured to perform network configuration on the link topology data in the plurality of different types of networks to obtain connection configuration information of each type of network;
a slice creation module configured to create a network slice of the user network slice data in each type network using the connection configuration information of each type network.
9. A network management system comprising an orchestrator and a base network controller, wherein,
the base network controller configured to receive user network slice data from the orchestrator and perform the network slice creation method of any of claims 1 to 7.
10. A network slice creation system comprising a memory and a processor;
the memory is used for storing executable program codes;
the processor is configured to read executable program code stored in the memory to perform the network slice creation method of any of claims 1 to 7.
11. A computer-readable storage medium, comprising instructions that when executed on a computer cause the computer to perform the network slice creation method of any one of claims 1 to 7.
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| PCT/CN2020/130427 WO2021098824A1 (en) | 2019-11-20 | 2020-11-20 | Network slice creation method, basic network controller, system, and storage medium |
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