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SDN-based distributed virtual network mapping method

A technology of virtual network mapping and virtual network, which is applied in the field of regional network, and can solve the problems of aggravating the communication burden of communication links and wasting space resources

Active Publication Date: 2019-04-05
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this form increases the communication burden of the communication link, uses too much communication space resources, and requires regular communication between nodes to maintain the accurate timeliness of the information table, so a lot of space resources are wasted

Method used

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  • SDN-based distributed virtual network mapping method
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  • SDN-based distributed virtual network mapping method

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] Software Defined Networking (SDN) separates the control plane from the data plane and realizes regional centralized control, such as figure 2 . During the virtual network mapping process, the main function of the SDN controller is to receive the virtual network topology information that needs to be mapped, maintain the physical network topology information of the area, and control the mapping time and scope of the virtual network topology.

[0024] According to ① in claim 1, the SDN controller and each physical node need to establish a resource table. like image 3 , the control area of ​​the SDN controller contains 6 physical nodes and 7 physical links. A physical node resource table including all nodes and a physical link resource table of all links are established in the SDN controller.

[0025] node name

Total CPU resources

CPU resource remaining

Operating status

Location

C

40

40

normal

Connect B and D

D

38 ...

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PUM

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Abstract

The invention discloses an SDN-based distributed virtual network mapping method. Virtual network mapping is divided into virtual node mapping and virtual link mapping. Under control of an SDN controller, the controller can collect and master information of all nodes and links in a regional network, and virtual node mapping is carried out according to the size of CPU occupied by virtual nodes arranged in a descending order; and after successful virtual node mapping, the information which needs to be mapped is issued to the physical node, the physical node can map related links in a distributedway, and the shortest path algorithm is used to select the best path according to the link bandwidths and the link lengths for virtual link mapping. The latest condition of the nodes and the links canbe controlled globally, distributed link mapping can also be carried out in a condition of reducing occupied node resources, the mapping time is shortened, the security of the physical network is enhanced, and the mapping efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of virtual network mapping, especially in a regional network under the centralized control of a software-defined network (SDN) controller. Background technique [0002] The measuring standard of the virtual network mapping is the length of the mapping time and the usage of the transmission space during the mapping process. [0003] The virtual network mapping under the SDN controller, because there is an SDN controller for centralized monitoring and management of the area, the area information can be updated in real time; in terms of mapping, the mapping and matching of nodes and links can be performed inside the controller, and the matching Success information is sent to the corresponding nodes and links. In this way, the matching time can be reduced, and the occupation of redundant transmission space can also be reduced. However, the SDN controller can only perform sequential matching during the matching...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24
CPCH04L41/04H04L41/12H04L41/145
Inventor 韩永亮霍如
Owner BEIJING UNIV OF TECH
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