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Path computing method and device in SD-WAN environment

A technology of SD-WAN and path calculation, applied in the field of communication, can solve problems such as single service QoS indicators, calculation methods that cannot be adjusted according to service characteristics, and network status that cannot be accurately measured

Active Publication Date: 2018-08-24
XI AN JIAOTONG UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide a path calculation method and device in an SD-WAN environment that can solve the problems that the existing network status cannot be accurately measured, the service QoS index of the path calculation method is single, and the calculation method cannot be adjusted according to the service characteristics.

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Embodiment Construction

[0051] The content of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0052] In the embodiment of the present invention: one, the SD-WAN environment is a necessary condition, figure 1 with figure 2 is a concrete manifestation of the necessary environment, image 3 yes figure 1 figure 2 The transmission process of medium flow; Two, QoS guarantee is one of characteristics of the present invention, Figure 4 It is the flow process of QoS guarantee realization; Three, the path calculation method is the core of the present invention, Figure 5 It is the specific flow of the calculation method.

[0053] The terms "local SD-WAN" and "global SD-WAN" are first introduced in this invention. Local area SD-WAN refers to a network controlled by a single SDN controller in a wide area network environment; global SD-WAN refers to a wide area network composed of multiple local area SD-WANs with a global controller. ...

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Abstract

The invention provides a path computing method and a path computing device with QoS guarantee in an SD-WAN environment. The path computing method performs path computation in a path computing device by using an ant colony model, using a node defined by a QoS state of a data plane and a link QoS parameter as inspiring factors of the model, and using a target QoS strategy defined by a network application as a target. The path computing device comprises an overall SD-WAN path computing device and a local area SD-WAN path computing device which separately comprise a control layer, a data layer andan application layer, wherein the control layer comprises topology discovery, state detection and path computing modules that are necessary for path computation. According to the computing method anddevice provided by the invention, the problems that the existing network state cannot be accurately computed, the path computing method service QoS index is single, and the computing method cannot beadjusted according to service characteristics are mainly solved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a path calculation method and device in an SD-WAN environment. Background technique [0002] With the continuous development of software-defined network (Software Defined Network, SDN) technology, its application scenarios gradually shift from campuses, data centers, etc. to wider regions, and more and more network providers begin to apply SDN technology to wide area networks. , Software Defined Wide Area Network (Software Defined Wide Area Network, SD-WAN) is in constant development. In the WAN environment, due to the wide area and many services, it is difficult to adjust the network service strategy according to the service type; the private MPLS leased line is expensive, which greatly increases the cost of the enterprise. SD-WAN utilizes the idea of ​​software definition, and has the characteristics of global network view, centralized network control, and open network servic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/721H04L12/725H04L12/851H04L12/931H04L12/947H04L12/24H04L12/26
CPCH04L41/145H04L43/0852H04L43/106H04L45/123H04L45/124H04L45/302H04L47/24H04L49/205H04L49/25
Inventor 曲桦赵季红李彬
Owner XI AN JIAOTONG UNIV
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