Software defined network route selection method

A software-defined network and routing technology, applied in the field of communication networks, can solve problems such as not considering routing methods, reducing control plane overhead, and reducing topology construction overhead

Inactive Publication Date: 2016-05-04
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] Document [BatalleJ, FerrerJ, EscalonaE, etal.OntheImplementationofNFVoveranOpenFlowInfrastructure:RoutingFunctionVirtualization[C] / / 2013IEEESDNforFutureNetworksandServices(SDN4FNS),pp.1-6.]It is proposed to use the routing function virtualization module RFV to realize the virtual routing protocol to reduce the overhead of the control plane , but did not consider the specific routing method; literature [ZhaoK, LiQ, JiangY.Flow-LevelConsistentUpdateinSDNBasedonK-prefixCovering[C] / / IEEEGlobalCommunicationsConference (GLOBECOM), 2014, pp.1884-1889.] for SDN complex network architecture and discontinuous network state may cause routing conflicts and transmission interruptions, a K-level prefix coverage mechanism is proposed to ensure continuous configuration at the data flow level; literature [ZhangSQ; ZhangQ; BannazadehH, etal. 2015, pp.5595-5601] proposed to select an appropriate multicast topology routing algorithm for source and destination virtualized nodes to reduce topology construction overhead, but this algorithm failed to comprehensively consider multiple factors affecting data transmission QoS

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

[0034] figure 1Shown is a schematic diagram of the routing and forwarding model of the present invention. The data flow sent by the user arrives in the network, and the ingress switch receives the data flow and checks the matching flow entry. If it exists, it implements the corresponding action in the flow table; the ingress switch sends the new data flow forwarding request to the SDN controller; the controller based on the received data Forward the request message to obtain the state information of the data flow, the QoS requirement information and the state information of the target switch, and call the topology module to obtain the state information of the network resources; the controller calls the candidate route determination algorithm to determine the candidate route of the data flow, and then calls the optimal route selection Algor...

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Abstract

The invention relates to a software defined network route selection method belonging to the communication network technical field. The method aims at the defect of the existing SDN route selection algorithm; resources transmitted and stored by a physical switch are divided by using an NFV (Network Functions Virtualization) technique; multiple virtual switches are constructed; a QoS demand oriented service support is realized; a route corresponding to the optimum transmission performance is optimized and determined through evaluating the service feature of a source node, the transmission feature of every candidate route and the transmission performances of the source node data passing through every candidate route; therefore user QoS is effectively ensured; and the network performance is optimized.

Description

technical field [0001] The invention belongs to the technical field of communication networks, and relates to a software-defined network routing selection method. Background technique [0002] Software Defined Networking (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 top layer is the application layer, including various services and applications; the middle layer is the control layer, which is mainly responsible for processing the arrangement of data forwarding device resources, maintaining network topology and status information, etc.; the bottom layer It is the data layer, which is mainly responsible for data processing, forwarding and state collection based on the flow table. SDN has the characteristics of separation of control plane and data plane, centralized network control, open network interface between control plane and d...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/721H04L12/725
CPCH04L45/14H04L45/302
Inventor 柴蓉蒋桂香胡恂陈前斌
Owner CHONGQING UNIV OF POSTS & TELECOMM
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