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Software defined networking routing method

A software-defined network and link selection technology, which is applied in the field of communication networks, can solve problems such as switch load imbalance, achieve the effect of minimizing network load and improving network performance

Active Publication Date: 2017-07-07
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a software-defined network routing selection method, by modeling the network load as the objective function, under the constraints of link capacity, link selection, and routing hops, the minimum network load Turn it into a goal and implement a data flow routing strategy based on network load optimization to solve the problem of unbalanced load of switches in the network, realize network load balance and improve network performance

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Embodiment Construction

[0033] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] figure 1 Shown is a schematic diagram of the routing and forwarding model of the present invention. The user sends the data flow to the source switch of the core network, the source switch receives the data flow and checks whether there is a matching flow entry, and if it exists, it implements the corresponding action of the flow table; the source switch sends the data flow forwarding request to the SDN controller; the SDN controller Obtain the state information of the data flow according to the received data forwarding request message, and call the topology structure module to obtain the network state information and link capacity information;

[0035] Determine the candidate route between the source switch and the destination switch based on the logic algebraic algorithm; model the data flow routing identification; model the routi...

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Abstract

The invention relates to a software defined networking routing method and belongs to the technical field of a communication network. According to the method, state information of a data stream is obtained through an SDN controller according to a received data forwarding request message, and a topological structure module is called for obtaining network state information and link capacity information; candidate routes between a source switch to a destination switch are determined; a routing method is modeled; and a data stream routing strategy based on network load optimization is realized with the purpose of minimizing network loads under restrictions such as the link capacity, link selection and route hop count. According to the software defined networking routing method provided by the invention, the problem that the load of each switch in the network is imbalanced is solved, and the network loads are balanced, and the network performance is improved.

Description

technical field [0001] The invention belongs to the technical field of communication networks, in particular to a software-defined network routing selection method. Background technique [0002] Software Defined Networking (SDN) is a new network innovation architecture based on OpenFlow proposed by Stanford University. The typical architecture of SDN is divided into three layers. The upper layer is the application layer, including various services and applications; The layer is mainly responsible for data processing, forwarding and state collection based on the flow table. The main features of SDN include separation of control plane and data plane, centralized network control, open network interface provided between control plane and data plane equipment, network can be programmed by external programs, etc., so that flexible control of network traffic can be realized, making the network as a The pipeline becomes more intelligent, thus providing a good platform for core net...

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Application Information

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IPC IPC(8): H04L12/709H04L12/721H04L12/725H04L12/729H04L12/733H04L12/803H04L45/243H04L45/122H04L45/125
CPCH04L45/125H04L45/20H04L45/245H04L45/306H04L45/38H04L47/125
Inventor 柴蓉蒋桂香陈前斌
Owner CHONGQING UNIV OF POSTS & TELECOMM
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