CN115915404A - Network slice deployment system and method based on NFV-MANO - Google Patents
Network slice deployment system and method based on NFV-MANO Download PDFInfo
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Abstract
The invention discloses a network slice deployment system based on NFV-MANO, which comprises an infrastructure resource layer, a network slice layer, a service layer and a management arranging unit, wherein the infrastructure resource layer maps physical resources into virtual resources, the virtual resources are provided with access interfaces connected with the physical resources, the network slice layer comprises a plurality of network slices, the network slices comprise one or more service chains, each service chain comprises a plurality of VNFs connected by virtual links, each service chain is used for providing a network service, and the management arranging unit manages the infrastructure resource layer, the network slice layer and the service layer. The invention adds a management and arrangement unit to manage the three network layers so as to realize the high-efficiency management and the dynamic deployment of the network slicing system.
Description
Technical Field
The invention belongs to the technical field of network virtualization, and particularly relates to a network slice deployment system and method based on NFV-MANO.
Background
Compared with a 5G network, the traditional mobile communication network service mainly comprises mobile terminals such as mobile phones and tablets, the provided service type is single, and the constructed network service can cover most application scenes. However, in a 5G network, network requirements are obviously differentiated, such as high-speed and high-throughput network hotspots, low-delay and high-reliability automatic control, high-mobility and high-precision positioning automatic driving, massive access internet of things and the like, network services and infrastructure arrangement are different in emphasis points, and a single network service cannot meet multiple network requirements of an operator.
The network slicing technology provides differentiated network services meeting different performance requirements for a 5G network, and vertical industry requirements with different performance requirements in a 5G scene are met by establishing a plurality of mutually independent network slices. Each network slice is designed and customized for a specific network service according to the requirements of an operator, and different network slices coexist and are isolated from each other on the same physical network, so that the network services provided by different network slices are not influenced by each other, the problems that the network slices may have redundant workflow execution and excessive network resource scheduling in the operation process are solved, and how to provide efficient management and dynamic deployment for a network slice system becomes a requirement.
Disclosure of Invention
In order to solve the problems of the prior art solutions, the present invention provides a Network slice deployment system and method based on NFV-MANO, which satisfy the efficient Management and dynamic deployment of Network slices by establishing an infrastructure resource layer, a Network slice layer, and a service layer, and introducing a Network Function Virtualization (NFV) Management and Orchestration (MANO) unit.
The technical scheme adopted by the invention is as follows:
a network slice deployment system based on NFV-MANO comprises an infrastructure resource layer, a network slice layer, a service layer and a management arranging unit, wherein the infrastructure resource layer maps physical resources into virtual resources, the virtual resources are provided with access interfaces connected with the physical resources, the network slice layer comprises a plurality of network slices, each network slice comprises one or more service chains, each service chain comprises a plurality of VNFs connected through virtual links, each service chain is used for providing one network service, and the management arranging unit manages the infrastructure resource layer, the network slice layer and the service layer.
Preferably, the management and arrangement unit includes an orchestrator, a VNF manager, a virtual resource manager, and a slice manager, the orchestrator arranges the network slices and the network resources, the VNF manager manages the VNF templates, the slice manager manages the network slice templates, and the virtual resource manager records virtual resource data and allocates virtual resources.
Preferably, the orchestrator performs the steps of:
the orchestrator calculates virtual resources required by network slicing parameters in slicing requests, sends information acquisition requests to the virtual resource manager, receives existing virtual resource information sent back by the virtual resource manager, judges whether the existing virtual resources meet the required virtual resources, if yes, the orchestrator sends network slicing creation requests to the slicing manager, and if not, the orchestrator puts the slicing requests back to a slicing request queue;
the orchestrator matches the network slice template according to the network slice parameters and sends matching results to the slice manager;
and the orchestrator determines the required VNF according to the preset network function of the newly created network slice, matches a VNF template according to the required VNF, and sends a matching result to the VNF manager.
Preferably, the orchestrator further performs the steps of:
and forming a virtual function forwarding graph by the VNF in the network slice and the link information of the VNF, and sending an materialization request of the network slice and the virtual function forwarding graph to the VNF template.
Preferably, the slice manager performs the steps of:
and receiving a matching result sent by the orchestrator, if the matching result is successful, selecting a matched network slice template to create a network slice, and if the matching result is failed, creating a new network slice.
Preferably, the VNF manager performs the steps of:
receiving a matching result sent by the orchestrator, if the matching result is successful, selecting a matched VNF template, and if the matching result is failed, creating a new VNF template;
and obtaining the VNF in the VNF template and the virtual resource required by the VNF according to the virtual function forwarding graph, and sending the VNF and the virtual resource required by the VNF to the VRM as a resource request.
Preferably, the virtual resource manager performs the steps of:
setting a virtual resource list, wherein the resource list records the type and the capacity of virtual resources and provides an access interface facing the outside;
receiving a resource request of a slice manager or a VNF manager and a virtual network function forwarding map of an orchestrator;
providing required virtual resources according to the resource request;
according to the virtual network function forwarding graph, the virtual link is used for linking the required virtual resources to form corresponding network service;
and deleting the linked virtual resources in the virtual resource list, and updating the virtual resource list.
Preferably, the management orchestration unit further includes a VNF directory table, where the VNF directory table records VNF template information to which the VNF belongs and VNF own attribute information, and the VNF own attribute includes resource demand, allocation principle, operator policy, and software version information.
Preferably, the system further comprises an SDN controller, wherein the SDN controller adjusts network resources in the plurality of network slices according to the network slice parameters.
Preferably, the SDN controller performs the steps of:
receiving a network slice parameter and a corresponding network service of a service layer;
analyzing the network slicing parameters to obtain required virtual resources;
acquiring virtual resource information of existing network slices and network services in a network slice layer;
judging whether the residual virtual resources reserved after the existing virtual resources are redistributed meet the required virtual resources;
if the network slice parameters are not met, the SDN controller finishes the step of adjusting the network resources in the network slices according to the network slice parameters, if the network slice parameters are met, virtual resources meeting the network service of the network slices are redistributed to the existing network slices in the network slice layer, and residual virtual resources are obtained;
and establishing a new network slice according to the virtual resource required by the network service link.
Preferably, the network slice parameters include bandwidth, latency, and QoS.
Preferably, the physical resources include frequency spectrum, bandwidth, routing switching equipment, storage center and processor, and the virtual resources include large data center and high speed network connection.
A network slice deployment method based on NFV-MANO comprises the following steps:
s1, an operator provides network requirements, a service layer customizes network slicing parameters according to the network requirements and records the network slicing parameters as slicing requests;
s2, the orchestrator receives a slicing request service sent by a service layer, extracts network slicing parameters, matches a network slicing template according to the network slicing parameters, and sends matching results to a slicing manager;
s3, the slice manager receives the matching result, if the matching result is successful, the slice manager selects the matched network slice template to create a network slice and executes the step 5, and if the matching result is failed, the slice manager creates a new network slice;
s4, the orchestrator determines a needed VNF according to the preset network function of the newly created network slice, matches a VNF template according to the needed VNF, sends a matching result to a VNF manager, if the matching result is successful, the VNF manager selects the matched VNF template, and if the matching result is failed, the VNF manager creates a new VNF template;
s5, the virtual resource manager receives a resource request sent by the slice manager or the VNF manager, wherein the resource request comprises virtual resources required by the materialization of the network slice, and also receives a virtual function forwarding graph sent by the orchestrator;
and S6, the virtual resource manager obtains the required virtual resources according to the resource request, and links the required virtual resources by using the virtual link according to the virtual network function forwarding graph to form the related network service.
Preferably, step S1 comprises the steps of: the service layer sends the slice request and the corresponding network service to an SDN controller, and the SDN controller adjusts network resources in a plurality of network slices.
Preferably, the SDN controller performing network resource adjustment in a plurality of network slices includes:
receiving a slicing request and corresponding network service of a service layer;
analyzing the network slicing parameters in the slicing request to obtain the required virtual resources;
acquiring virtual resource information of existing network slices and network services in a network slice layer;
judging whether the residual virtual resources reserved after the existing virtual resources are redistributed meet the required virtual resources;
if the network slice parameters are not met, the SDN controller adjusts the network resources in the network slices according to the network slice parameters, and if the network slice parameters are met, virtual resources meeting network services of the network slices are redistributed to the existing network slices in the network slice layer, and residual virtual resources are obtained;
and establishing a new network slice according to the virtual resource required by the network service link.
Preferably, the method further comprises the step S7: when the life cycle of the network slice is finished, the virtual resource manager releases the virtual resources occupied by the network slice and updates the virtual resource list.
The beneficial effects of the invention include: the method comprises the steps of realizing network request generation, network slice establishment and network resource allocation basic operation flows by establishing an infrastructure resource layer, a network slice layer and a service layer, adding a management and arrangement unit to manage three network layers to improve the network slice efficiency, further enabling a slice manager and a VNF manager to be respectively used for providing a network slice template and a VNF template, further increasing the network slice deployment efficiency, and further enabling an SDN controller to receive a network request of the service layer and reschedule network resources in the network slice layer, enabling an operator to provide the network request and simultaneously adjust resources in a self-operated network slice to meet the new network request. Further, the SDN controller is further connected to the VNF directory table, so that before the network slice is established according to the network slice parameters, the VNF directory table is queried to check whether there is available VNF template selection, so as to improve network slice establishment efficiency.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a block diagram of an NFV-MANO based network slice deployment system of the present invention,
figure 2 is a block diagram of a network slice layer of an NFV-MANO based network slice deployment system of the present invention,
figure 3 is a block diagram of the infrastructure resource layer of a NFV-MANO based network slice deployment system of the present invention,
FIG. 4 is a flow chart of a network slice deployment method in accordance with the present invention based on NFV-MANO,
fig. 5 is a flowchart illustrating network resource adjustment performed by an SDN controller in multiple network slices in an NFV-MANO-based network slice deployment method according to the present invention.
Detailed description of the preferred embodiment
The following description of the embodiments of the present invention is provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
Referring to fig. 1, the scheme adopted by the present embodiment includes: a network slice deployment system based on NFV-MANO comprises an infrastructure resource layer, a network slice layer, a service layer and a management and organization unit, wherein the infrastructure resource layer maps physical resources into virtual resources, the virtual resources are provided with access interfaces connected with the physical resources, the network slice layer comprises a plurality of network slices, each network slice comprises one or more service chains, each service chain comprises a plurality of VNFs connected by virtual links, each service chain is used for providing one network service, and the management and organization unit manages the infrastructure resource layer, the network slice layer and the service layer.
The infrastructure resource layer is positioned at the bottom layer of the network slice model, provides various infrastructure resources for the network slice layer and is used for meeting the service requirements of various network slice operators. In the infrastructure resource layer, the resources provided for the network slice layer are all virtualized resources, and the virtualized resources are cloud-based logical resources formed by operations of extraction, isolation, re-representation and the like through underlying physical resources, and comprise nodes and links of a network, such as a large data center and a high-speed network connection. The resource type, capacity and external facing access interface are recorded by a virtual resource list, which is maintained and maintained dynamically by a Virtual Resource Manager (VRM), such as removing allocated resource information from the virtual resource list or adding recycled resource information to the list for re-deployment. When the infrastructure resource layer is accessed by the rest network layers, the access interface allocated to the virtual resource is found according to the resource list to call the corresponding bottom physical resource, and the bottom physical resource comprises but is not limited to frequency spectrum, bandwidth, routing switching equipment, a storage center, a processor and the like.
The network slice layer is arranged in the middle layer of the network slice model and consists of a plurality of network slices, each network slice is an independent end-to-end logic network and is distributed to a slice operator for providing one or more network services. The same slice operator can simultaneously own a plurality of network slices, and can perform resource reallocation between slice networks operated by the same slice operator according to the SDN controller connected between the infrastructure resource layer and the network slice layer without making a corresponding network slice request to a provider, namely applying for and waiting for resource reallocation through the management orchestration unit. In the NFV architecture, a network service is equivalent to a service chain, and a group of specific VNFs are connected by virtual links to form a service chain according to a virtual network function forwarding graph, so as to provide a specific network service; meanwhile, the modular network function realized by the VNF entity obtained after the VNF is instantiated is composed of a VNF template and corresponding network resources required for operating the network function. By allocating mutually isolated resources, each VNF template can create a plurality of VNF entities, but each VNF entity can only be occupied and used by a certain service chain, so that isolation between different network services can be achieved. The network slice as a complete logic network may be composed of one or more mutually independent service chains, or may be directly composed of a slice template and corresponding resources at the bottom layer. The VNF manager in the management orchestration unit is used for management of VNFs, including creation, configuration, instantiation, dynamic adjustment, etc. of VNFs. Unlike the NFVO in the NFV architecture, which is responsible for the lifecycle management of the network service, the system proposed in this embodiment uses a dedicated slice management unit to be responsible for the management operations of the network slice and the network service.
The service layer is positioned at the top layer of the network slice model, provides various characteristic network services in the 5G network, such as enhanced mobile broadband, ultra-reliable low-delay and large-scale machine communication, and meets various customized network requirements of users. The Business Operation Support System (BOSS) is an intermediary between a slice operator and a management unit. Is mainly responsible for the traditional network management Functions (FCAPS), namely: fault Management (Fault Management), configuration Management (Configuration Management), accounting Management (Accounting Management), performance Management (Performance Management), and Security Management (Security Management).
The service layer is managed by a network slicing operator, the network slicing operator learns certain requirements of users through market research, network slicing parameters which can meet the requirements are customized, the network slicing parameters comprise bandwidth, time delay, qoS and the like, the slicing parameters are sent to a network slicing supplier as slicing requests to be provided, and the operation of the whole network slicing system is triggered.
Further, a network slice deployment system based on the NFV-MANO further includes an SDN controller, the SDN controller adjusts network resources in a plurality of network slices according to network slice parameters, the SDN controller executes the following steps:
receiving a network slice parameter and a corresponding network service of a service layer;
analyzing the network slicing parameters to obtain required virtual resources;
acquiring virtual resource information of existing network slices and network services in a network slice layer;
judging whether the residual virtual resources reserved after the existing virtual resources are redistributed meet the required virtual resources;
if the network slice parameters are not met, the SDN controller finishes the step of adjusting the network resources in the network slices according to the network slice parameters, if the network slice parameters are met, virtual resources meeting the network service of the network slices are redistributed to the existing network slices in the network slice layer, and residual virtual resources are obtained;
and establishing a new network slice according to the virtual resource required by the network service link.
The SDN controller added between the service layer and the network slice layer is used for receiving network requests of the service layer and rescheduling network resources in the network slice layer, so that an operator can make resource adjustment in self-owned network slices to meet new network requests while making network requests, and does not need to apply for a management orchestrator and wait for resource reallocation. Different from the prior art that the network slice is established only by a supplier through a management arranging unit, the setting of the SDN controller improves the slice establishing efficiency and reduces the load of the management arranging unit, and the signaling overhead and the computing pressure of a management arranging device are reduced to a great extent through a resource optimization mode among multiple slice networks of a unified operator. When one operator carries out resource scheduling optimization among different network slices, the resource scheduling optimization only needs to report to the orchestrator and the slice manager, and resource endowing operation does not need to be carried out through the virtual resource manager. When one slice network provides multiple network services at the same time, different network service chains are not interfered with each other, and virtual network function forwarding graphs and related resources forming the service chains are managed by the orchestrator.
Further, the management and organization unit includes an Orchestrator (Orchester), a VNF Manager (VNFM), a Virtual Resource Manager (VRM), and a Slice Manager (Slice Manager, NSM), where the Orchestrator organizes network slices and network resources, the VNF Manager manages VNF templates, the Slice Manager manages network Slice templates, and the Virtual Resource Manager records Virtual Resource data and allocates Virtual resources.
The traditional operator-centralized resource allocation management model is not advisable in 5G slice networks: firstly, the full scheduling utilization of limited physical resources is difficult to guarantee; and secondly, the investment cost of operators. The management orchestration unit is arranged for managing different network services and efficiently allocating network resources in the network slicing system.
Further, the orchestrator performs the steps of:
the method comprises the steps that a composer calculates virtual resources required by network slicing parameters in slicing requests, sends information acquisition requests to a virtual resource manager and receives existing virtual resource information sent back by the virtual resource manager, judges whether the existing virtual resources meet the required virtual resources or not, if yes, the composer sends network slicing creation requests to the slicing manager, and if not, the composer puts the slicing requests back to a slicing request queue;
the orchestrator matches the network slice template according to the network slice parameters and sends the matching result to the slice manager;
and the orchestrator determines the required VNF according to the preset network function of the newly created network slice, matches the VNF template according to the required VNF and sends the matching result to the VNF manager.
Further, the orchestrator performs the following steps:
and forming a virtual function forwarding graph by the VNF in the network slice and the link information of the VNF, and sending an materialization request of the network slice and the virtual function forwarding graph to the VNF template.
The orchestrator is mainly responsible for network slicing and the task of orchestration of network resources. The method comprises the steps of network slicing and VNF template configuration management, verification of the integrity of the VNF template and authorization authentication; VNFM and SM entity management; verifying and authorizing resource requests from the VNFM and SM; virtual network function forwarding list management, creating, upgrading, inquiring, deleting and other operations forming network service; automatic management of network slices and VNF entities, and configuration of templates according to trigger rules and operation flows; resource allocation management of the network slice and the VNF entity, and position information of available resources is provided for the SM and the VNFM by positioning and accessing different VRMs; and collecting resource use information and managing an available resource list.
When the operator has a new slicing request to send to the orchestrator, the orchestrator firstly queries the existing slicing template and available network resources, and if so, sends the appropriate template to the slicing manager to create the network slices required by the operator. If no suitable template exists, the organizer configures a new slicing template according to the slicing parameters and the service types provided by the operator, and the customizing function is completed. When an operator needs to add a new network service in a certain network slice, the orchestrator searches or creates a related VNF template according to the VNF required for implementing the network service function, generates a virtual network function forwarding list, and completes a network service request. The network slicing template and the VNF template can be established to further improve the slicing efficiency, so that under the condition of the existing template, the template does not need to be newly established for realizing the function, and the slicing time is saved.
Further, the slice manager performs the steps of:
and receiving a matching result sent by the orchestrator, if the matching result is successful, selecting a matched network slice template to create a network slice, and if the matching result is failed, creating a new network slice.
The slice manager is responsible for network slice-related management. The method comprises the following steps: creating and configuring a network slice entity and entity feasibility check according to a network slice template provided by an orchestrator; managing the life cycle of the network slices; scale adjustment and dynamic expansion of the network slicing entity; integrity, independence monitoring during slice runs; and (5) carrying out offline slicing operation.
The slice manager is a new entity element added in the NFV-MANO for related management operations of the network slice entity. Each network slice entity is a logic independent network, and provides various performance differentiated services for users. Creation of network slices is done by generating virtual links through the VRM across these allocated resources, via one or more hops, based on the slice template from the orchestrator and the number of resource types required. Each network slice entity is provided with a unique slice ID by a corresponding slice manager, and a certain slice operator is assigned to provide corresponding services for users.
Further, the VNF manager performs the steps of:
receiving a matching result sent by an orchestrator, if the matching result is successful, selecting a matched VNF template, and if the matching result is failed, creating a new VNF template;
and obtaining the VNF in the VNF template and the virtual resource required by the VNF according to the virtual function forwarding graph, and sending the VNF and the virtual resource required by the VNF to the VRM as a resource request.
Further, the management and orchestration unit further includes a VNF directory table, where the VNF directory table records VNF template information to which the VNF belongs and VNF attribute information, and the VNF attribute includes resource demand, allocation principle, operator policy, and software version information.
The VNF manager is responsible for the relevant management of VNF entities. The method comprises the steps of establishing and configuring a VNF entity and feasibility check according to a VNF template; running a VNF entity software updating and upgrading program; VNF entity scale adjustment and dynamic expansion; collecting a bottom layer resource performance test result and fault event information related to a VNF entity; monitoring integrity and automatically repairing during operation of a VNF entity; and receiving notification about change of VNF lifecycle management and entity offline operation.
In the NFV architecture, each VNF has a corresponding VNF manager, that is, each VNF manager may manage one or more homogeneous or heterogeneous VNFs. The detailed configuration parameters and operation behaviors of each VNF are stored in a corresponding VNF template, and the VNFM creates a corresponding VNF entity according to the template and monitors the operation state thereof. All VNF entities running online write their own configuration template information and their own attributes such as resource demand, allocation principle, operator policy, and software version information into a description file and store it in a VNF directory table (VNF catalog). By accessing the directory list, it is possible to view the relevant information of the VNF entity and allocate the underlying resources required for implementing the VNF according to the requirements in the description file. And the VNFM also checks whether the software version of the VNF is matched with the resources by accessing the directory list, and performs software updating, upgrading and other operations.
Further, the virtual resource manager performs the steps of:
setting a virtual resource list, wherein the resource list records the type and the capacity of virtual resources and provides an access interface facing the outside;
receiving a resource request of a slice manager or a VNF manager and a virtual network function forwarding map of an orchestrator;
providing required virtual resources according to the resource request;
according to the virtual network function forwarding graph, the virtual link is used for linking the required virtual resources to form corresponding network service;
and deleting the linked virtual resources in the virtual resource list, and updating the virtual resource list.
The virtual resource manager is responsible for managing the underlying resources of the slice network, recording and allocating the virtual resources. Mapping management of physical resources to virtual resources is included; virtual resource control, allocation, update, release, recovery, and the like; creating a virtual link and a node, and supporting the realization of a virtual network function forwarding list; managing a directory list of physical and virtual resources, and discovering the resources; the virtual resource using condition and the residual amount are counted and forwarded; collecting and forwarding physical hardware, software resource, virtual resource performance and fault information;
such SDN controllers are integrated into the VRM unit of the orchestration manager, queried by VRM monitoring, by adding SDN controllers in the virtual resource manager for allocating scheduling resources to authorized users. The virtual resource manager controls the underlying resources that manage the entire network slice, including physical hardware (compute, storage, routing, switch, etc.), software (controller), and virtual resources (virtual machines), among others. The virtual resource managers can be divided according to resource types, such as exclusive virtual resource managers of resources such as calculation, storage, network and the like, or different infrastructure providers, for example, each provider has a virtual resource manager for managing the resources of the provider, or according to geographical positions, for example, a virtual resource manager is for managing the resources of a single node or a plurality of nodes in the same region. The mapping from Virtual resources to physical resources is called Virtual Network mapping (VNE) problem, and is a process of extracting and re-representing physical resources. The physical resources are mapped to form a software image, and the external service can access the image through the interface and is connected to the corresponding physical resources. The virtual resource list is managed and controlled by the virtual resource manager, and the operations comprise list updating, image upgrading, adding and deleting and the like.
The steps executed by each structure in the management and arrangement unit have no specific sequence, and the execution sequence of each structure is implemented and executed according to the realized functions and purposes in sequence.
According to a network slice deployment method based on NFV-MANO, which is provided by a network slice deployment system based on NFV-MANO, the method comprises the following steps:
s1, an operator provides network requirements, a service layer customizes network slicing parameters according to the network requirements, and the network slicing parameters are recorded as slicing requests;
s2, the orchestrator receives a slicing request service sent by the service layer, extracts network slicing parameters, matches a network slicing template according to the network slicing parameters, and sends matching results to the slicing manager;
s3, the slice manager receives the matching result, if the matching result is successful, the slice manager selects the matched network slice template to create a network slice and executes the step 5, and if the matching result is failed, the slice manager creates a new network slice;
s4, the orchestrator determines a needed VNF according to the preset network function of the newly created network slice, matches a VNF template according to the needed VNF, sends a matching result to the VNF manager, if the matching result is successful, the VNF manager selects the matched VNF template, and if the matching result is failed, the VNF manager creates a new VNF template;
s5, the virtual resource manager receives a resource request sent by the slice manager or the VNF manager, wherein the resource request comprises virtual resources required by the network slice for materialization, and also receives a virtual function forwarding graph sent by the orchestrator;
and S6, the virtual resource manager obtains the required virtual resources according to the resource request, and links the required virtual resources by using the virtual link according to the virtual network function forwarding graph to form the related network service.
Further, step S1 includes the steps of: and the service layer sends the slice request and the corresponding network service to the SDN controller, and the SDN controller adjusts network resources in a plurality of network slices.
Further, the network resource adjustment of the SDN controller in the plurality of network slices includes the steps of:
receiving a slicing request and corresponding network service of a service layer;
analyzing the network slicing parameters in the slicing request to obtain the required virtual resources;
acquiring virtual resource information of existing network slices and network services in a network slice layer;
judging whether the residual virtual resources reserved after the existing virtual resources are redistributed meet the required virtual resources;
if the network slice parameters are not met, the SDN controller adjusts the network resources in the network slices according to the network slice parameters, and if the network slice parameters are met, virtual resources meeting network services of the network slices are redistributed to the existing network slices in the network slice layer, and residual virtual resources are obtained;
and establishing a new network slice according to the virtual resource required by the network service link.
Further, the method also comprises the step S7: when the life cycle of the network slice is finished, the virtual resource manager releases the virtual resources occupied by the network slice and updates the virtual resource list.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above examples, and any changes or substitutions which are not thought of by the inventive work should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (16)
1. A network slice deployment system based on NFV-MANO is characterized by comprising an infrastructure resource layer, a network slice layer, a service layer and a management orchestration unit, wherein the infrastructure resource layer maps physical resources into virtual resources, the virtual resources are provided with access interfaces connected with the physical resources, the network slice layer comprises a plurality of network slices, each network slice comprises one or more service chains, each service chain comprises a plurality of VNFs connected by virtual links, each service chain is used for providing one network service, and the management orchestration unit manages the infrastructure resource layer, the network slice layer and the service layer.
2. The NFV-MANO-based network slice deployment system of claim 1, wherein the management orchestration unit comprises an orchestrator that orchestrates network slices and network resources, a VNF manager that manages VNF templates, a virtual resource manager that manages network slice templates, and a slice manager that records virtual resource data and allocates virtual resources.
3. The NFV-MANO-based network slice deployment system of claim 2, wherein the orchestrator performs the steps of:
the orchestrator calculates virtual resources required by network slicing parameters in slicing requests, sends information acquisition requests to the virtual resource manager, receives existing virtual resource information sent back by the virtual resource manager, judges whether the existing virtual resources meet the required virtual resources, if yes, the orchestrator sends network slicing creation requests to the slicing manager, and if not, the orchestrator puts the slicing requests back to a slicing request queue;
the orchestrator matches the network slicing template according to the network slicing parameters and sends the matching result to the slicing manager;
and the orchestrator determines the required VNF according to the preset network function of the newly created network slice, matches the VNF template according to the required VNF and sends the matching result to the VNF manager.
4. The NFV-MANO-based network slice deployment system of claim 2, wherein the orchestrator further performs the steps of:
and forming a virtual function forwarding graph by the VNF in the network slice and the link information of the VNF, and sending an materialization request of the network slice and the virtual function forwarding graph to the VNF template.
5. The NFV-MANO-based network slice deployment system of claim 2, wherein the slice manager performs the steps of:
and receiving a matching result sent by the orchestrator, if the matching result is successful, selecting a matched network slice template to create a network slice, and if the matching result is failed, creating a new network slice.
6. The NFV-MANO-based network slice deployment system of claim 2, wherein the VNF manager performs the steps of:
receiving a matching result sent by the orchestrator, if the matching result is successful, selecting a matched VNF template, and if the matching result is failed, creating a new VNF template;
and obtaining the VNF in the VNF template and the virtual resource required by the VNF according to the virtual function forwarding graph, and sending the VNF and the virtual resource required by the VNF to the VRM as a resource request.
7. The NFV-MANO based network slice deployment system of claim 2, wherein the virtual resource manager performs the steps of:
setting a virtual resource list, wherein the resource list records the type and the capacity of virtual resources and provides an access interface facing the outside;
receiving a resource request of a slice manager or a VNF manager and a virtual network function forwarding map of an orchestrator;
providing required virtual resources according to the resource request;
according to the virtual network function forwarding graph, the virtual link is used for linking the required virtual resources to form corresponding network service;
and deleting the linked virtual resources in the virtual resource list, and updating the virtual resource list.
8. The NFV-MANO-based network slice deployment system of claim 1, wherein the management orchestration unit further comprises a VNF directory table, the VNF directory table records VNF template information of a VNF and VNF self-attribute information, and the VNF self-attribute includes resource requirements, allocation principles, operator policies, and software version information.
9. The NFV-MANO-based network slice deployment system of claim 1, further comprising an SDN controller that adjusts network resources among a plurality of network slices according to network slice parameters.
10. The NFV-MANO based network slice deployment system of claim 9, wherein the SDN controller performs the steps of:
receiving a network slice parameter and a corresponding network service of a service layer;
analyzing the network slicing parameters to obtain required virtual resources;
acquiring virtual resource information of existing network slices and network services in a network slice layer;
judging whether the residual virtual resources reserved after the existing virtual resources are redistributed meet the required virtual resources;
if the network slice parameters are not met, the SDN controller finishes the step of adjusting the network resources in the network slices according to the network slice parameters, if the network slice parameters are met, virtual resources meeting the network service of the network slices are redistributed to the existing network slices in the network slice layer, and residual virtual resources are obtained;
and establishing a new network slice according to the virtual resource required by the network service link.
11. The NFV-MANO-based network slice deployment system of claim 1, wherein the network slice parameters comprise bandwidth, latency, and QoS.
12. The NFV-MANO-based network slice deployment system of claim 1, wherein the physical resources comprise spectrum, bandwidth, routing switches, storage centers, and processors, and the virtual resources comprise large data centers and high speed network connections.
13. A network slice deployment method based on NFV-MANO is characterized by comprising the following steps:
s1, an operator provides network requirements, a service layer customizes network slicing parameters according to the network requirements, and the network slicing parameters are recorded as slicing requests;
s2, the orchestrator receives a slicing request service sent by a service layer, extracts network slicing parameters, matches a network slicing template according to the network slicing parameters, and sends matching results to a slicing manager;
s3, the slice manager receives the matching result, if the matching result is successful, the slice manager selects the matched network slice template to create a network slice and executes the step 5, and if the matching result is failed, the slice manager creates a new network slice;
s4, the orchestrator determines a needed VNF according to the preset network function of the newly created network slice, matches a VNF template according to the needed VNF, sends a matching result to the VNF manager, if the matching result is successful, the VNF manager selects the matched VNF template, and if the matching result is failed, the VNF manager creates a new VNF template;
s5, the virtual resource manager receives a resource request sent by the slice manager or the VNF manager, wherein the resource request comprises virtual resources required by the materialization of the network slice, and also receives a virtual function forwarding graph sent by the orchestrator;
and S6, the virtual resource manager obtains the required virtual resources according to the resource request, and links the required virtual resources by using the virtual link according to the virtual network function forwarding graph to form the related network service.
14. The NFV-MANO-based network slice deployment method of claim 13, wherein the step S1 comprises the steps of: the service layer sends the slice request and the corresponding network service to an SDN controller, and the SDN controller adjusts network resources in a plurality of network slices.
15. The NFV-MANO-based network slice deployment method of claim 14, wherein the SDN controller making network resource adjustments in a plurality of network slices comprises:
receiving a slicing request and corresponding network service of a service layer;
analyzing the network slicing parameters in the slicing request to obtain the required virtual resources;
acquiring virtual resource information of existing network slices and network services in a network slice layer;
judging whether the residual virtual resources reserved after the existing virtual resources are redistributed meet the required virtual resources;
if the network slice parameters are not met, the SDN controller adjusts the network resources in the network slices according to the network slice parameters, and if the network slice parameters are met, virtual resources meeting network services of the network slices are redistributed to the existing network slices in the network slice layer, and residual virtual resources are obtained;
and establishing a new network slice according to the virtual resource required by the network service link.
16. The NFV-MANO-based network slice deployment method of claim 13, further comprising step S7: when the life cycle of the network slice is finished, the virtual resource manager releases the virtual resources occupied by the network slice and updates the virtual resource list.
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| CN116915823B (en) * | 2023-09-11 | 2024-01-23 | 北京城建智控科技股份有限公司 | Subway train monitoring system |
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