CN110995514B - A multi-dimensional end-to-end network slice generation device and method - Google Patents

Abstract

The invention discloses a multi-dimensional end-to-end network slice generating device and method, which overcomes that the user plane only sends a slice request in the prior art, the slice is not created, the resource division is not thorough enough, and the generated general abstract topology cannot be accurately Reflecting the actual connection situation between network functional units, the implementation steps are: (1) create an application container; (2) generate a user plane network slice; (3) divide the virtual network according to the flow space rules; (4) generate a control plane network slicing; (5) generating multi-dimensional end-to-end network slices; in the process of designing a multi-dimensional end-to-end network slice generating device and method, the present invention generates network slices from two dimensions of the user plane and the control plane, and generates Functionally and logically isolated end-to-end network slicing.

Description

A multi-dimensional end-to-end network slice generation device and method

technical field

The present invention belongs to the field of communication technologies, and further relates to a multi-dimensional end-to-end network slice generation device and method in the field of wireless communication technologies. The present invention constructs a multi-dimensional end-to-end network slice by dividing the network slice into two dimensions, the user plane network slice and the control plane network slice. The end-to-end network slice can be virtualized on a unified physical network infrastructure by Instantiate multiple logical networks to create network slices that are logically isolated in terms of functions and resources, and realize the network isolation of different types of network slices in the fifth generation mobile communication network 5G (the fifth generation).

Background technique

With the development of communication network technologies, services in 5G networks are becoming more and more diverse. Compared with traditional networks, end-to-end network slicing can make full use of limited network resources and flexibly divide network resources for different types of services. End-to-end network slicing technology provides customized services on demand for diverse services in the network by virtualizing multiple networks on a unified physical network infrastructure. The created network slicing is logical in terms of functions and resources. Isolated.

Beijing University of Posts and Telecommunications proposed in its patent document "Template-based 5G end-to-end network slice generation method and device" (application date: June 4, 2018, application number: 201810564658.3, application publication number: CN108770016A) Template-based 5G end-to-end network slice generation method. The specific steps of the method are as follows: the first step is to receive a network slice generation request, where the slice generation request is used to generate a network slice. The second step is to trigger, according to the slice generation request, to use a general template to generate an abstract topology corresponding to the network slice, where the abstract topology is used to describe the connection relationship between various network functional units. In the third step, the corresponding abstract topology is mapped to the physical topology through a mapping strategy to generate the network slice. The disadvantage of this method is that when the network slice generation device receives multiple network slice generation requests with similar network requirements, it will use the same general template to generate the same type of abstract topology according to the slice generation request. Policies map abstract topologies of the same type to physical topologies to generate network slices of the same type. Network slices of the same type are not logically isolated in terms of functions and resources, so the generated network slices cannot work stably. This document also proposes a template-based 5G end-to-end network slice generation device, including: 1. a receiving module, configured to receive a network slice generation request, where the slice generation request is used to generate a network slice. 2. A generation module, configured to trigger the generation of an abstract topology corresponding to the network slice by using a general template according to the slice generation request, where the abstract topology is used to describe the connection relationship between each network functional unit. 3. A mapping module, configured to map the corresponding abstract topology to a physical topology through a mapping strategy to generate the network slice. The disadvantage of this device is that the generation module uses a generic template to generate the abstract topology corresponding to the network slice, and the generic abstract topology generated by the generation module cannot accurately reflect the actual connection between the network functional units. As a result, the network slices generated by the mapping module cannot provide functionally and logically isolated network slices for different applications, resulting in the generated network slices not working stably.

China Telecom Co., Ltd. proposed a kind of network in its patent document "Network Slicing Generation Method and Network Slicing System" (application date: August 4, 2017, application number: 201710658893.2, application publication number: CN 109547227 A) Slice generation method and system. The specific steps of the method are as follows: the first step is to receive a slice creation request from a user, where the slice creation request includes slice template information selected by the user. In the second step, a network function virtualization orchestrator NFVO (Network Functions Virtualisation Orchestrato) is selected according to the user's network information, and an instruction for creating a network service instance is sent to the NFVO. In the third step, the slice identifier and the association relationship between the slice identifier and the network service instance are obtained from the NFVO, and the creation success information is fed back to the user. The disadvantage of this method is that the method needs to accept the slice request of the user plane, and then obtain the slice identifier through the network function virtualization orchestrator of the control plane, and then create the network slice. Only a slice request is sent on the user plane, and no slice is created, and the resource division is not thorough enough. Network slicing takes a long time to complete the creation, the user waits for a long time, and the time complexity is high. This document also proposes a network slicing system, including a slice management module. The slice management module includes: a request acquisition unit for receiving a slice creation request from a user, where the slice creation request includes slice template information selected by the user; instruction sending The unit is used to select the NFVO according to the user's network information, and send the network service instance creation instruction to the NFVO, so that the NFVO can generate the network service instance according to the slice template information; the result relay unit is used to obtain the slice identifier and the slice identifier and the network service from the NFVO. The association relationship of the instance, and feedback the creation success information to the user. The disadvantage of this system is that the system needs to request the acquisition unit to send the creation command and then go to the command sending unit to select the network function virtualization orchestrator to create the network slice. The network resources are only divided on the control plane, and the user plane only sends the generated Request, resource division is not thorough enough. In addition, the network slice takes a long time to complete the creation, the user waits for a long time, and the time complexity is high.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose a multi-dimensional end-to-end network slice generation device and method in view of the shortcomings of the above-mentioned prior art, the end-to-end network slice generation device and method take into account the bandwidth resource requirements of two Internet services The end-to-end network slice is generated from the two dimensions of the user plane and the control plane, and the network resources are divided on the user plane and the control plane to meet the bandwidth resource requirements of Internet services.

The idea of the present invention to achieve the above object is that the user plane network slice generation module divides the computing and storage resources on the user plane according to the different bandwidth requirements of Internet services; sets different links, and performs network data transmission priority and bandwidth resources. Division; the control plane network slice generation module divides the same physical network topology into two virtual network topologies, and divides the network; the policy management and control module formulates different resource allocation policies for the two networks, and sends the policy to the control plane network slice The generation module; the control plane network slice generation module manages and controls the user plane network slice according to the received resource allocation policy; the user terminal accesses the Internet service through the user plane network slice, and generates an end-to-end network slice from the user terminal to the Internet service end.

A multi-dimensional end-to-end network slice generation device of the present invention includes a user terminal, a policy management and control module, an external interface, a user plane slice generation module, and a control plane slice generation module; the user terminal communicates with the user plane slice through the external interface. The generation module is connected, the user plane slice generation module is connected with the control plane slice generation module through an external interface, and the control plane slice generation module is connected with the policy management and control module through an external interface; wherein,

The user terminal is used to generate a multi-dimensional end-to-end network slice, the user terminal accesses the user plane network slice through the wireless access point, and the control plane network slice forwards the flow in the user plane network slice according to the flow table generated by the user terminal. , the user plane network slice is connected to the application container through the transmission control protocol TCP, and the application container is connected to the Internet service through the hypertext transfer protocol HTTP to generate a multi-dimensional end-to-end network slice.

The user plane slice generation module includes a container generation module, a wireless router, a wireless network card, and a wireless access point for generating user plane network slices; the container generation module generates high bandwidth requirements corresponding to two Internet services with high and low bandwidth requirements Containers and containers with low bandwidth requirements; the user plane slice generation module labels each Ethernet frame passing through the port of the wireless router, and divides the wireless network card of the wireless router into two wireless access points, and two Internet services with high and low bandwidth requirements pass through The two wireless access points are connected to the two wired links of the wireless router; the user plane slice generation module creates two data forwarding queues for the two wired links respectively, each data forwarding queue corresponds to a wired link, and the data forwarding queue Set one wired link as a high-bandwidth demand link with high network bandwidth and high data forwarding priority, and set the other wired link as a low-bandwidth demand link with low network bandwidth and low data forwarding priority, with high bandwidth demand The container and the low-bandwidth demand container respectively access the high-bandwidth demand link and the low-bandwidth demand link from the virtual network port of the container to generate user plane network slices; the user plane slice generation module connects the high bandwidth demand link and the low bandwidth demand link to the link. Loaded into the control plane slice generation module;

The control plane slice generation module includes an SDN controller, a user plane network virtualization platform, and a control plane network virtualization platform, and is used to generate a control plane network slice. The control plane slice generation module uses the network data packets specified by the southbound interface protocol. Forwarding rules, obtain the nodes and links in the network, obtain the global physical network topology from the high-bandwidth demand link and the low-bandwidth demand link, and the control plane slice generation module virtualizes the obtained global physical network topology into two virtual network topologies ; The control plane network virtualization platform specifies the destination IP address, destination physical address, and destination port for the software-defined network SDN controller according to the flow space rules, and the SDN controller analyzes the network nodes and links of the virtual network topology through the southbound interface protocol. , if there is a high-bandwidth demand link in the virtual network topology, send a high-bandwidth policy request to the policy management and control module through flow space rules; if there is a low-bandwidth demand link in the virtual network topology, send it to the policy management and control module through flow space rules. Low bandwidth policy request; the SDN controller receives high and low priority data forwarding policies through the northbound interface protocol, and identifies the feature identifiers in the received high and low priority data forwarding policies; if the feature identifier number is 200, it is judged as high priority data forwarding Policy, if the feature identifier number is 100, it is judged as a low-priority data forwarding policy; the SDN controller stores the destination IP address and destination physical address of the high and low bandwidth demand links in the forwarding information table FIB; the SDN controller obtains it through the IP protocol Data packets in high- and low-priority data forwarding policies; the SDN controller forwards the destination IP address and destination physical address of the high-bandwidth demand link in the FIB to the data packets in the high-priority data forwarding policy, and forwards the low-bandwidth demand in the FIB to the data packets in the high-priority data forwarding policy. The destination IP address and destination physical address of the link are forwarded to the data packets of the low priority data forwarding policy; the SDN controller extracts the destination IP address and destination physical address of each data packet in the high and low priority data forwarding policies, which will have the same purpose The data packets of the IP address and the destination physical address are divided into a flow; the SDN controller stores the search times, sending and receiving packets, survival time, receiving conditions, and discarding conditions of each data packet in each flow into the action table; SDN control The controller forwards the number of lookups, packets sent and received, survival time, reception status, and discard status in the action table to each flow, and specifies the destination address and data transmission priority for each flow; the SDN controller counts the destination address and data transmission priority of each flow. The data transmission priority generates the flow table; the SDN controller sends the flow table to the wireless router through the southbound interface protocol to generate the control plane network slice;

The policy management and control module is used to formulate a management and control policy. The policy management and control module obtains a policy request from the SDN controller through the northbound interface protocol. High-priority data forwarding policy; the policy management and control module adds a feature identifier set to 100 to the network traffic from the SDN controller, and sets it as a low-priority data forwarding policy; the policy management and control module uses the northbound interface protocol to define the high and low priorities. The data forwarding policy is delivered to the corresponding SDN controller.

The steps of the method of the present invention include the following:

Step 1, create the application container:

The container generation module generates a high-bandwidth demand container and a low-bandwidth demand container corresponding to two Internet services with high and low bandwidth requirements;

Step 2, generate user plane network slices:

The user plane slice generation module labels each Ethernet frame passing through the wireless router port, and divides the wireless network card of the wireless router into two wireless access points, and the two Internet services with high and low bandwidth requirements are connected through the two wireless access points. two wired links into the wireless router;

The user plane slice generation module creates two data forwarding queues for the two wired links respectively. Each data forwarding queue corresponds to a wired link. The data forwarding queue sets a wired link to be one with high network bandwidth and high data forwarding priority. A high-bandwidth demand link, set another wired link as a low-bandwidth demand link with low network bandwidth and low data forwarding priority, and the high-bandwidth demand container and the low-bandwidth demand container respectively access the high bandwidth from the virtual network port of the container Demand links and low bandwidth demand links generate user plane network slices;

Step 3, divide the virtual network according to the flow space rules:

The user plane slice generation module mounts the high-bandwidth demand link and the low-bandwidth demand link to the control plane slice generation module. The control plane slice generation module uses the network packet forwarding rules specified by the southbound interface protocol to obtain the nodes in the network. and links, obtain the global physical network topology from the high-bandwidth demand link and the low-bandwidth demand link, and the control plane slice generation module virtualizes the obtained global physical network topology into two virtual network topologies;

The user plane network virtualization platform in the control plane slice generation module specifies the destination IP address, destination physical address, and destination port for each virtual network topology according to the flow space rules;

Step 4, generate control plane network slices:

In the first step, the control plane network virtualization platform specifies the destination IP address, destination physical address, and destination port for the software-defined network SDN controller according to the flow space rules. If there is a high-bandwidth demand link in the virtual network topology, a high-bandwidth policy request is sent to the policy management and control module through the flow space rule; if there is a low-bandwidth demand link in the virtual network topology, the flow space rule is used. The management and control module sends a low-bandwidth policy request;

In the second step, the policy management and control module obtains a policy request from the SDN controller through the northbound interface protocol, and the policy management and control module adds a feature identifier set to 200 to the network traffic from the SDN controller, and sets it as a high-priority data forwarding policy; policy The management and control module adds a feature identifier set to 100 to the network traffic from the SDN controller, and sets it as a low-priority data forwarding policy; the policy management and control module sends the formulated high- and low-priority data forwarding policy to the corresponding data forwarding policy through the northbound interface protocol. SDN controller;

In the third step, the SDN controller receives the high and low priority data forwarding policies through the northbound interface protocol, and identifies the feature identifiers in the received high and low priority data forwarding policies; if the feature identifier is 200, it is judged as a high priority data forwarding policy , if the feature identifier number is 100, it is judged as a low-priority data forwarding strategy; the SDN controller stores the destination IP address and destination physical address of the high and low bandwidth demand links in the forwarding information table FIB; the SDN controller obtains the high and low levels through the IP protocol. The data packet in the priority data forwarding policy; the SDN controller forwards the destination IP address and destination physical address of the high-bandwidth demand link in the FIB to the data packet of the high-priority data forwarding strategy, and the low-bandwidth demand link in the FIB is forwarded. The destination IP address and destination physical address of the route are forwarded to the data packets of the low priority data forwarding policy; the SDN controller extracts the destination IP address and destination physical address of each data packet in the high and low priority data forwarding policies, and will have the same destination IP address. The data packets of the address and the destination physical address are divided into a flow; the SDN controller stores the search times, sending and receiving packets, survival time, receiving conditions, and discarding conditions of each data packet in each flow into the action table; Forward the search times, sending and receiving packets, survival time, reception status, and discard status in the action table to each flow, and specify the destination address and data transmission priority for each flow; the SDN controller counts the destination address and data of each flow The transmission priority generates the flow table; the SDN controller sends the flow table to the wireless router through the southbound interface protocol to generate the control plane network slice;

Step 5, generate multi-dimensional end-to-end network slices:

The user terminal accesses the user plane network slice through the wireless access point, and the control plane network slice forwards the flow in the user plane network slice according to the flow table generated by the control plane network slice. The user plane network slice is connected to the application container through the transmission control protocol TCP, and the application The container is connected to the Internet service through the hypertext transfer protocol HTTP to generate multi-dimensional end-to-end network slices.

Compared with the prior art, the present invention has the following advantages:

First, the control plane slice generation module in the multi-dimensional end-to-end network slice generation device of the present invention uses the network packet forwarding rules specified by the southbound interface protocol to obtain nodes and links in the network, and from the high-bandwidth demand chain The global physical network topology is obtained from the links and links with low bandwidth requirements, which overcomes the fact that the generation module in the prior art uses a general template to generate the abstract topology corresponding to the network slice, and the general abstract topology generated by the generation module cannot accurately reflect the network function units. Therefore, the device of the present invention can accurately obtain the actual connection situation between the network functional units, thereby improving the working stability of the network slicing of the control plane; the policy management and control module can The network slicing settings of the control plane are adjusted according to the connection situation, which is convenient for maintaining the work of end-to-end network slicing.

Second, the user plane slice generation module in the multi-dimensional end-to-end network slice generation device of the present invention labels each Ethernet frame passing through the port of the wireless router, and divides the wireless network card of the wireless router into two wireless access It overcomes the need for the system in the prior art to request the acquisition unit to send a creation instruction and then go to the instruction sending unit to select the network function virtualization orchestrator to create a network slice. The network resources are only divided on the control plane, and the user plane only sends the creation request. The problem of insufficient resource division enables the user plane slice generation module of the present invention to divide the radio resources of the user plane, thereby improving the network resource division efficiency of end-to-end network slices.

Third, in the multi-dimensional end-to-end network slice generation method of the present invention, the data forwarding queue sets one wired link as a high-bandwidth demand link with high network bandwidth and high data forwarding priority, and sets the other wired link User plane network is generated for links with low bandwidth requirements with low network bandwidth and low data forwarding priority, containers with high bandwidth requirements and containers with low bandwidth requirements, respectively, from the virtual network ports of the containers to access the links with high bandwidth requirements and the links with low bandwidth requirements. Slicing overcomes the problems in the prior art that only slice requests are sent on the user plane, no slices are created, and resource division is not thorough enough, so that the end-to-end network slice generation method of the present invention can generate user plane network slices on the user plane, improving the The resource partitioning efficiency of end-to-end network slicing is improved.

Fourth, in the multi-dimensional end-to-end network slice generation method of the present invention, the user plane network virtualization platform in the control plane slice generation module specifies a destination IP address, a destination physical address, a destination IP address, and a destination IP address for each virtual network topology according to flow space rules. The port overcomes the problem that the network slice generation device in the prior art receives multiple network slice generation requests with similar network requirements, and uses the same general template to generate the same type of abstract topology according to the slice generation request. The end-to-end network slice generation method can generate different types of abstract topologies according to different network requirements, which improves the work stability of end-to-end network slices.

Description of drawings

Fig. 1 is the module diagram of the device of the present invention;

Figure 2 is a flow chart of the method of the present invention.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings.

Referring to FIG. 1 , the apparatus for generating multi-dimensional end-to-end network slices of the present invention will be further described.

The multi-dimensional end-to-end network slice generation device of the present invention includes a user terminal, a policy management and control module, an external interface, a user plane slice generation module, and a control plane slice generation module.

The user terminal is connected with the user plane slice generation module through the external interface, the user plane slice generation module is connected with the control plane slice generation module through the external interface, and the control plane slice generation module is connected with the policy management and control module through the external interface.

The user terminal is used to generate a multi-dimensional end-to-end network slice, the user terminal accesses the user plane network slice through the wireless access point, and the control plane network slice forwards the flow in the user plane network slice according to the flow table generated by the user terminal. , the user plane network slice is connected to the application container through the transmission control protocol TCP, and the application container is connected to the Internet service through the hypertext transfer protocol HTTP to generate a multi-dimensional end-to-end network slice.

The user plane slice generation module includes a container generation module, a wireless router, a wireless network card, and a wireless access point, and is used for generating user plane network slices. The container generating module generates a high-bandwidth demand container and a low-bandwidth demand container corresponding to two Internet services with high and low bandwidth demands. The user plane slice generation module labels each Ethernet frame passing through the wireless router port, and divides the wireless network card of the wireless router into two wireless access points, and the two Internet services with high and low bandwidth requirements are connected through the two wireless access points. two wired links into the wireless router. The user plane slice generation module creates two data forwarding queues for the two wired links respectively. Each data forwarding queue corresponds to a wired link. The data forwarding queue sets a wired link to be one with high network bandwidth and high data forwarding priority. A high-bandwidth demand link, set another wired link as a low-bandwidth demand link with low network bandwidth and low data forwarding priority, and the high-bandwidth demand container and the low-bandwidth demand container respectively access the high bandwidth from the virtual network port of the container Demand links and low bandwidth demand links generate user plane network slices. The user plane slice generation module mounts the high-bandwidth demand link and the low-bandwidth demand link to the control plane slice generation module.

The control plane slice generation module includes an SDN controller, a user plane network virtualization platform, and a control plane network virtualization platform, and is used to generate a control plane network slice, and the control plane slice generation module uses the network packet forwarding specified by the southbound interface protocol. According to the rules, the nodes and links in the network are obtained, and the global physical network topology is obtained from the high-bandwidth demand link and the low-bandwidth demand link. The control plane slice generation module virtualizes the obtained global physical network topology into two virtual network topologies. The control plane network virtualization platform specifies the destination IP address, destination physical address, and destination port for the software-defined network SDN controller according to the flow space rules. The SDN controller analyzes the network nodes and links of the virtual network topology through the southbound interface protocol. If there is a high-bandwidth demand link in the virtual network topology, a high-bandwidth policy request is sent to the policy management and control module through the flow space rule. If there is a low-bandwidth demand link in the virtual network topology, a low-bandwidth policy request is sent to the policy management and control module through the flow space rule. The SDN controller receives the high and low priority data forwarding policies through the northbound interface protocol, and identifies the feature identifiers in the received high and low priority data forwarding policies. If the feature identifier number is 200, it is determined as a high-priority data forwarding strategy. If the feature identifier number is 100, it is determined as a low-priority data forwarding strategy. The SDN controller stores the destination IP addresses and destination physical addresses of the high and low bandwidth demand links in the forwarding information table FIB. The SDN controller obtains the data packets in the high and low priority data forwarding policies through the IP protocol. The SDN controller forwards the destination IP address and destination physical address of the high-bandwidth demand link in the FIB to the data packet of the high-priority data forwarding policy, and forwards the destination IP address and destination physical address of the low-bandwidth demand link in the FIB. Data packets for low priority data forwarding policies. The SDN controller extracts the destination IP address and destination physical address of each data packet in the high-low priority data forwarding policy, and divides the data packets with the same destination IP address and destination physical address into a flow. The SDN controller stores the search times, sending and receiving packets, time-to-live, receiving conditions, and discarding conditions of each data packet in each flow into the action table. The SDN controller forwards the search times, sent and received packets, survival time, reception status, and discard status in the action table to each flow, and assigns the destination address and data transmission priority for each flow. The SDN controller counts the destination address and data transmission priority of each flow to generate a flow table. The SDN controller sends the flow table to the wireless router through the southbound interface protocol to generate control plane network slices.

The policy management and control module is used to formulate a management and control policy, the policy management and control module obtains a policy request from the SDN controller through the northbound interface protocol, and the policy management and control module adds a feature identifier set to 200 to the network traffic from the SDN controller, and is set to high. Priority data forwarding policy. The policy management and control module adds a feature identifier set to 100 to the network traffic from the SDN controller, and sets it as a low-priority data forwarding policy. The policy management and control module sends the formulated high and low priority data forwarding policy to the corresponding SDN controller through the northbound interface protocol.

Referring to FIG. 2 , the multi-dimensional end-to-end network slice generation method of the present invention is further described.

Step 1, create an application container.

The container generating module generates a high-bandwidth demand container and a low-bandwidth demand container corresponding to two Internet services with high and low bandwidth demands. For example, set for online video service.

Step 2: Generate user plane network slices.

The user plane slice generation module labels each Ethernet frame passing through the wireless router port, and divides the wireless network card of the wireless router into two wireless access points, and the two Internet services with high and low bandwidth requirements are connected through the two wireless access points. two wired links into the wireless router.

The user plane slice generation module creates two data forwarding queues for the two wired links respectively. Each data forwarding queue corresponds to a wired link. The data forwarding queue sets a wired link to be one with high network bandwidth and high data forwarding priority. A high-bandwidth demand link, set another wired link as a low-bandwidth demand link with low network bandwidth and low data forwarding priority, and the high-bandwidth demand container and the low-bandwidth demand container respectively access the high bandwidth from the virtual network port of the container Demand links and low bandwidth demand links generate user plane network slices.

Step 3: Divide the virtual network according to the flow space rule.

The user plane slice generation module mounts the high-bandwidth demand link and the low-bandwidth demand link to the control plane slice generation module. The control plane slice generation module uses the network packet forwarding rules specified by the southbound interface protocol to obtain the nodes in the network. and links, obtain the global physical network topology from the high-bandwidth demand link and the low-bandwidth demand link, and the control plane slice generation module virtualizes the obtained global physical network topology into two virtual network topologies.

The user plane network virtualization platform in the control plane slice generation module specifies a destination IP address, a destination physical address, and a destination port for each virtual network topology according to flow space rules. The flow space rule means that in a software-defined network, the network virtualization platform divides network traffic into multiple disconnected areas through message rewriting, and these areas are called flow spaces. Network traffic is transmitted in multiple flow spaces, forming multiple unconnected network links. The network virtualization platform specifies a destination IP address, a destination physical address, and a destination port for each network link. The network virtualization platform refers to the user plane network virtualization platform in step 3, and the network virtualization platform refers to the control plane network virtualization platform in step 4.

Step 4, generate control plane network slices.

In the first step, the control plane network virtualization platform specifies the destination IP address, destination physical address, and destination port for the software-defined network SDN controller according to the flow space rules. If there is a high-bandwidth demand link in the virtual network topology, a high-bandwidth policy request is sent to the policy management and control module through flow space rules. If there is a low-bandwidth demand link in the virtual network topology, a low-bandwidth policy request is sent to the policy management and control module through the flow space rule.

In the second step, the policy management and control module obtains a policy request from the SDN controller through the northbound interface protocol, and the policy management and control module adds a feature identifier set to 200 to the network traffic from the SDN controller, and sets it as a high-priority data forwarding policy. The policy management and control module adds a feature identifier set to 100 to the network traffic from the SDN controller, and sets it as a low-priority data forwarding policy. The policy management and control module sends the formulated high and low priority data forwarding policy to the corresponding SDN controller through the northbound interface protocol.

In the third step, the SDN controller receives the high and low priority data forwarding policies through the northbound interface protocol, and identifies the feature identifiers in the received high and low priority data forwarding policies. If the feature identifier number is 200, it is determined as a high-priority data forwarding strategy, and if the feature identifier number is 100, it is determined as a low-priority data forwarding strategy. The SDN controller stores the destination IP addresses and destination physical addresses of the high and low bandwidth demand links in the forwarding information table FIB. The SDN controller obtains the data packets in the high and low priority data forwarding policies through the IP protocol. The SDN controller forwards the destination IP address and destination physical address of the high-bandwidth demand link in the FIB to the data packet of the high-priority data forwarding policy, and forwards the destination IP address and destination physical address of the low-bandwidth demand link in the FIB. Data packets for low priority data forwarding policies. The SDN controller extracts the destination IP address and destination physical address of each data packet in the high-low priority data forwarding policy, and divides the data packets with the same destination IP address and destination physical address into a flow. The SDN controller stores the search times, sending and receiving packets, time-to-live, receiving conditions, and discarding conditions of each data packet in each flow into the action table. The SDN controller forwards the search times, sent and received packets, survival time, reception status, and discard status in the action table to each flow, and assigns the destination address and data transmission priority for each flow. The SDN controller counts the destination address and data transmission priority of each flow to generate a flow table. The SDN controller sends the flow table to the wireless router through the southbound interface protocol to generate control plane network slices.

Step 5, generate multi-dimensional end-to-end network slices.

The user terminal accesses the user plane network slice through the wireless access point, and the control plane network slice forwards the flow in the user plane network slice according to the flow table generated by the control plane network slice. The user plane network slice is connected to the application container through the transmission control protocol TCP, and the application The container is connected to the Internet service through the hypertext transfer protocol HTTP to generate multi-dimensional end-to-end network slices.

Claims (3)

1. A multi-dimensional end-to-end network slice generation device comprises a user terminal, a strategy control module and an external interface, and is characterized by also comprising a user plane slice generation module and a control plane slice generation module; the user terminal is connected with the user plane slice generation module through an external interface, the user plane slice generation module is connected with the control plane slice generation module through the external interface, and the control plane slice generation module is connected with the strategy control module through the external interface; wherein,

the user terminal is used for generating a multi-dimensional end-to-end network slice, the user terminal accesses the user plane network slice through a wireless access point, the control plane network slice forwards the flow in the user plane network slice according to the generated flow table, the user plane network slice is connected to an application container through a Transmission Control Protocol (TCP), and the application container is connected to the Internet service through a hypertext transfer protocol (HTTP) to generate the multi-dimensional end-to-end network slice;

the user plane slice generating module comprises a container generating module, a wireless router, a wireless network card and a wireless access point and is used for generating user plane network slices; the container generation module generates a high bandwidth demand container and a low bandwidth demand container corresponding to the two internet services with high and low bandwidth demands; the user plane slice generation module marks each frame of the Ethernet passing through the port of the wireless router, divides the wireless network card of the wireless router into two wireless access points, and two Internet services with high and low bandwidth requirements are accessed into two wired links of the wireless router through the two wireless access points; the user plane slice generating module respectively creates two data forwarding queues for two wired links, each data forwarding queue corresponds to one wired link, one wired link is set as a high-bandwidth-demand link with high network bandwidth and high data forwarding priority by the data forwarding queues, the other wired link is set as a low-bandwidth-demand link with low network bandwidth and low data forwarding priority by the data forwarding queues, and a high-bandwidth-demand container and a low-bandwidth-demand container are respectively accessed into the high-bandwidth-demand link and the low-bandwidth-demand link from a virtual network port of the container to generate a user plane network slice; the user plane slice generation module mounts the high bandwidth demand link and the low bandwidth demand link into the control plane slice generation module;

the control surface slice generation module comprises an SDN controller, a user surface network virtualization platform and a control surface network virtualization platform and is used for generating control surface network slices, the control surface slice generation module acquires nodes and links in a network by using a network data packet forwarding rule specified by a southbound interface protocol, acquires a global physical network topology from a high-bandwidth demand link and a low-bandwidth demand link, and virtualizes the acquired global physical network topology into two virtual network topologies; a control plane network virtualization platform appoints a target IP address, a target physical address and a target port for a Software Defined Network (SDN) controller according to a flow space rule, the SDN controller analyzes network nodes and links of a virtual network topology through a southbound interface protocol, and if a high-bandwidth required link exists in the virtual network topology, a high-bandwidth strategy request is sent to a strategy control module through the flow space rule; if a low bandwidth demand link exists in the virtual network topology, sending a low bandwidth policy request to a policy control module through a flow space rule; the SDN controller receives a high-priority data forwarding strategy and a low-priority data forwarding strategy through a northbound interface protocol, and identifies characteristic identification symbols in the received high-priority data forwarding strategy and the received low-priority data forwarding strategy; if the characteristic identifier is 200, judging as a high-priority data forwarding strategy, and if the characteristic identifier is 100, judging as a low-priority data forwarding strategy; the SDN controller stores a destination IP address and a destination physical address of a link with high and low bandwidth requirements into a forwarding information table (FIB); the SDN controller acquires data packets in a high-priority data forwarding strategy and a low-priority data forwarding strategy through an IP protocol; the SDN controller forwards a target IP address and a target physical address of a high-bandwidth-demand link in the FIB to a data packet of a high-priority data forwarding strategy, and forwards a target IP address and a target physical address of a low-bandwidth-demand link in the FIB to a data packet of a low-priority data forwarding strategy; extracting a destination IP address and a destination physical address of each data packet in a high-priority and low-priority data forwarding strategy by the SDN controller, and dividing the data packets with the same destination IP address and destination physical address into one flow; the SDN controller stores the searching times, the packet receiving and sending, the survival time, the receiving condition and the discarding condition of each data packet in each flow into an action table; the SDN controller forwards the searching times, the receiving and sending packets, the survival time, the receiving condition and the discarding condition in the action table to each flow, and assigns a destination address and a data transmission priority to each flow; the SDN controller counts the destination address and the data transmission priority of each flow to generate a flow table; the SDN controller issues the flow table to the wireless router through a southbound interface protocol to generate a control plane network slice;

the policy control module is used for making a control policy, acquiring a policy request from the SDN controller through a northbound interface protocol, adding a characteristic identifier symbol set to be 200 into network flow from the SDN controller, and setting the characteristic identifier symbol as a high-priority data forwarding policy; adding a characteristic identifier symbol set to be 100 into network flow from an SDN controller by a policy control module, and setting the characteristic identifier symbol as a low-priority data forwarding policy; and the policy control module issues the formulated high-low priority data forwarding policy to the corresponding SDN controller through a northbound interface protocol.

2. The method for generating network slices according to claim 1, wherein the network slices are generated by dividing wireless access points to create data forwarding queues; dividing a virtual network by setting a flow space rule to generate a control plane network slice; generating a multidimensional end-to-end network slice; the method comprises the following steps:

step 1, creating an application container:

the container generation module generates a high bandwidth demand container and a low bandwidth demand container corresponding to the two internet services with high and low bandwidth demands;

step 2, generating a user plane network slice:

the user plane slice generation module marks each frame of the Ethernet passing through the port of the wireless router, divides the wireless network card of the wireless router into two wireless access points, and two Internet services with high and low bandwidth requirements are accessed into two wired links of the wireless router through the two wireless access points;

the user plane slice generating module respectively creates two data forwarding queues for two wired links, each data forwarding queue corresponds to one wired link, one wired link is set as a high-bandwidth-demand link with high network bandwidth and high data forwarding priority by the data forwarding queues, the other wired link is set as a low-bandwidth-demand link with low network bandwidth and low data forwarding priority by the data forwarding queues, and a high-bandwidth-demand container and a low-bandwidth-demand container are respectively accessed into the high-bandwidth-demand link and the low-bandwidth-demand link from a virtual network port of the container to generate a user plane network slice;

step 3, dividing the virtual network according to the stream space rule:

the user plane slice generation module mounts the high-bandwidth demand link and the low-bandwidth demand link into the control plane slice generation module, the control plane slice generation module acquires nodes and links in a network by using a network data packet forwarding rule specified by a southbound interface protocol, acquires a global physical network topology from the high-bandwidth demand link and the low-bandwidth demand link, and the control plane slice generation module virtualizes the acquired global physical network topology into two virtual network topologies;

a user plane network virtualization platform in the control plane slice generation module appoints a destination IP address, a destination physical address and a destination port for each virtual network topology according to a flow space rule;

step 4, generating a control plane network slice:

the method comprises the steps that firstly, a control plane network virtualization platform appoints a target IP address, a target physical address and a target port for a Software Defined Network (SDN) controller according to flow space rules, the SDN controller analyzes network nodes and links of a virtual network topology through a southbound interface protocol, and if high-bandwidth required links exist in the virtual network topology, high-bandwidth strategy requests are sent to a strategy control module through the flow space rules; if a low bandwidth demand link exists in the virtual network topology, sending a low bandwidth policy request to a policy control module through a flow space rule;

secondly, a policy management and control module acquires a policy request from the SDN controller through a northbound interface protocol, and the policy management and control module adds a characteristic identifier symbol set to be 200 to network traffic from the SDN controller and sets the characteristic identifier symbol as a high-priority data forwarding policy; adding a characteristic identifier symbol set to be 100 into network flow from an SDN controller by a policy control module, and setting the characteristic identifier symbol as a low-priority data forwarding policy; the strategy control module issues the formulated high-low priority data forwarding strategy to the corresponding SDN controller through a northbound interface protocol;

thirdly, the SDN controller receives the high-low priority data forwarding strategy through a northbound interface protocol and identifies the characteristic identifier in the received high-low priority data forwarding strategy; if the characteristic identifier is 200, judging as a high-priority data forwarding strategy, and if the characteristic identifier is 100, judging as a low-priority data forwarding strategy; the SDN controller stores a destination IP address and a destination physical address of a link with high and low bandwidth requirements into a forwarding information table (FIB); the SDN controller acquires data packets in a high-priority data forwarding strategy and a low-priority data forwarding strategy through an IP protocol; the SDN controller forwards a target IP address and a target physical address of a high-bandwidth-demand link in the FIB to a data packet of a high-priority data forwarding strategy, and forwards a target IP address and a target physical address of a low-bandwidth-demand link in the FIB to a data packet of a low-priority data forwarding strategy; extracting a destination IP address and a destination physical address of each data packet in a high-priority and low-priority data forwarding strategy by the SDN controller, and dividing the data packets with the same destination IP address and destination physical address into one flow; the SDN controller stores the searching times, the packet receiving and sending, the survival time, the receiving condition and the discarding condition of each data packet in each flow into an action table; the SDN controller forwards the searching times, the receiving and sending packets, the survival time, the receiving condition and the discarding condition in the action table to each flow, and assigns a destination address and a data transmission priority to each flow; the SDN controller counts the destination address and the data transmission priority of each flow to generate a flow table; the SDN controller issues the flow table to the wireless router through a southbound interface protocol to generate a control plane network slice;

step 5, generating a multidimensional end-to-end network slice:

the user terminal accesses the user plane network slice through the wireless access point, the control plane network slice forwards the flow in the user plane network slice according to the generated flow table, the user plane network slice is connected to the application container through a Transmission Control Protocol (TCP), and the application container is connected to the internet service through a hypertext transfer protocol (HTTP) to generate the multi-dimensional end-to-end network slice.

3. The method according to claim 2, wherein the stream space rule in steps 3 and 4 means that in the software defined network, the network virtualization platform divides the network traffic into a plurality of disconnected regions, which are called stream spaces, by message rewriting; the network flow is transmitted in a plurality of flow spaces to form a plurality of network links which are not connected with each other; the network virtualization platform appoints a destination IP address, a destination physical address and a destination port for each network link; the network virtualization platform refers to a user plane network virtualization platform in step 3, and refers to a control plane network virtualization platform in step 4.

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