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SDN based special flow QOS guaranteeing method

A flow, special technology, applied in the direction of digital transmission system, electrical components, transmission system, etc., can solve the problem of unable to provide QOS guarantee

Active Publication Date: 2015-03-25
SHENZHEN NEW GREENNET TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a QOS guarantee method for special traffic based on SDN, which mainly solves the problem that the existing network cannot provide QOS guarantee

Method used

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  • SDN based special flow QOS guaranteeing method

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Embodiment

[0051] In order to solve the problem of QOS guarantee of special service data flow in the network, the present invention provides a kind of QOS guarantee engineering method based on SDN special flow, such as figure 1 As shown, the method includes:

[0052] The incoming flow is distinguished, and whether the data flow is normal flow or special flow is judged according to whether the flow is registered.

[0053] For ordinary streams, use θ' e Dijkstra's algorithm for link weights. A simple example to illustrate how it separates the normal flow from the special flow as much as possible. Such as figure 2 As shown, the link capacity is 10Mbps, and the path s1-s2-s4 is all special flows, and the link load is 3Mbps, while the path s1-s3-s4 is all ordinary flows, and the average link load is also 3Mbps , now to a normal flow. Assuming that α=1, β=3 at this time, the weights on links s1-s2, s2-s4 are all θ' e =0.9, and the weight on s1-s3, s3-s4 is θ' e =0.3, so the path with t...

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Abstract

The invention discloses an SDN based special flow QOS guaranteeing method. The SDN based special flow QOS guaranteeing method comprises the following steps of dividing flows in a network into common flows and special flows with the QOS demand and respectively designing different routing algorithms for the common flows and the special flows. Route selection for the common flows is kept away from the special flows to the greatest extent so as to reduce the influence on the QOS indexes of the special flows, of the abruptness of the common flows. The routing algorithm under the multi-QOS-index constraint is provided for the special flows, and other existing special flows of the network can be adjusted to improve network throughput. For ensuring transmission of the special flows to the greatest extent, grouping of a part of common flows of the network is abandoned to guarantee the QOS demand when the link load of the network is too high and especially packet loss is severe. The SDN based special flow QOS guaranteeing method can effectively ensure the special flow QOS, enables flows needing QOS guarantee to be quickly and efficiently transmitted on the network and has very high practical value and promotional value.

Description

technical field [0001] The present invention relates to a network QOS (Quality of Service, service quality) guarantee method, in particular, relates to a kind of QOS guarantee method based on special flow of SDN (Software Defined Network, software defined network). Background technique [0002] IP networks provide best-effort service, using the shortest path to forward packets. This simple design differentiates IP networks from the competition and is the foundation of today's Internet. However, with the rise of applications such as VoIP (Voice over Internet Protocol, Internet telephony), IPTV (Internet Protocol Television, full name Internet Protocol Television), online streaming media, etc., the weakness that IP networks cannot provide QOS guarantees has gradually emerged. To deal with this problem, academia and industry have made many attempts, such as IntServ (Integrated Services, Integrated Services) and DiffServ (Differenciated Services, Differentiated Services) soluti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/725
Inventor 章小宁鲍新春杨宏伟王建国潘志光
Owner SHENZHEN NEW GREENNET TECH
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