Method for guaranteeing QoS (quality of service) of SDN (software defined network) by means of dynamic resource management

A dynamic management and network technology, applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problem that the QoS of traffic cannot be guaranteed, and achieve the effect of guaranteeing QoS, realizing dynamic management, and reducing impact

Inactive Publication Date: 2015-10-21
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: Aiming at the defects of the prior art, a method for ensuring the QoS of the SDN

Method used

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  • Method for guaranteeing QoS (quality of service) of SDN (software defined network) by means of dynamic resource management
  • Method for guaranteeing QoS (quality of service) of SDN (software defined network) by means of dynamic resource management
  • Method for guaranteeing QoS (quality of service) of SDN (software defined network) by means of dynamic resource management

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Embodiment

[0039] In order to solve the problem of QoS guarantee of service flow in the network, the present invention provides a method for QoS guarantee of SDN network with dynamic resource management. The specific process is as follows figure 1 As shown, the method includes:

[0040] The network traffic reaches the Openflow switch to match the flow table entry. If the flow table entry of the flow exists in the switch, the matching is successful and the forwarding strategy is executed according to the flow table entry instructions. If the flow is a newly arrived flow, it is forwarded to the controller. , Which is handled by the controller.

[0041] The SDN controller parses the data packets sent by the Openflow switch, and divides the flow into a normal flow and a QoS flow according to the characteristics of the flow. The QoS flow has a higher priority than the normal flow. There are many ways to classify traffic, such as source IP address, destination IP address, source port number, desti...

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Abstract

The invention discloses a method for guaranteeing the QoS (quality of service) of a SDN (software defined network) by means of dynamic resource management. The method is mainly characterized in that flows entering the SDN are classified according to the characteristics of the flows; the flows in the SDN are provided with different priorities; If multiple flows share one path and cause over-high link load, a low-load path is selected for a flow with a higher priority by a multi-constrained path optimization algorithm and an influence on ordinary flows are reduced as much as possible until the link recovers to a normal state; if not a path satisfying a condition exists, the flows are mapped into queues with different grades according to the different priorities of the flows and finally dynamic network resource management is achieved. The method fast solves over-high network link load, highly-efficiently utilizes network resources by means of a dynamic resource management scheme, guarantees the service request of flow with higher priority, and has good practical application value.

Description

Technical field [0001] The invention discloses an SDN network QoS guarantee method for dynamic resource management, and specifically relates to a flow control method for solving the problem that network resources cannot be used efficiently, traffic bandwidth requirements cannot be guaranteed, and user experience is affected, and belongs to network QoS guarantee Technical field. Background technique [0002] With the rapid expansion of network scale and the continuous enrichment of application types, the single best-effort service provided by the existing Internet can no longer meet the different requirements of multimedia applications and various users for network transmission quality. Some applications such as multimedia, video conferencing, IP videophone, etc. require reliable bandwidth guarantees to meet user experience. Therefore, the research field aimed at improving the utilization of network resources and providing users with higher quality of service (QoS) is currently e...

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Application Information

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IPC IPC(8): H04L12/851
CPCH04L47/24H04L47/805
Inventor 陈兵许晨辉朱小军翟象平
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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