OpenFlow network flow control method for QoS assurance of application

Abstract

The invention provides an OpenFlow network flow control method for the QoS assurance of an application. The OpenFlow network flow control method comprises the following steps that: a user requests a service from a server; the server sends a QoS request message to an SDN controller; after receiving the message, the controller calculates an optimal transmission path for the server according to a network resource use condition and reserves a resource; and simultaneously, the transmission state and the network link condition of the server are monitored when the server transmits a QoS data flow, such that a QoS flow is transmitted reliably and stably. A required network resource is provided for an application service by strictly assuring the QoS transmission of the application service and utilizing the service difference to network resource requirements; therefore, the QoS of the application is effectively ensured; and simultaneously, the network resource is utilized effectively.

Description

technical field [0001] The invention relates to a method for network guaranteeing application QoS (Quality of Service, quality of service), in particular to a flow control method for providing guarantee for application QoS in an OpenFlow network. Background technique [0002] New services such as multimedia and online interaction have high QoS requirements for transmission, usually requiring sufficient transmission bandwidth and the lowest possible delay, which are different from "best effort" type services. At present, the methods of providing QoS guarantee focus on resource reservation, queue priority scheduling, etc., but they are all based on the traditional network system, and there are many shortcomings. For example, resource reservation requires routers to have high performance, resulting in high overhead and poor scalability. And other shortcomings, queue management and scheduling are aimed at the aggregation flow, there are shortcomings such as coarse control granul...

AI Technical Summary

Problems solved by technology

At present, the methods of providing QoS guarantee focus on resource reservation, queue priority scheduling, etc., but they are all based on the traditional network system, and there are many shortcomings. For example, resource reservation requires routers to have high performance, resulting in high overhead and poor scalability. And other shortcomings, queue management and scheduling are aimed at the aggregation flow, there are shortcomings such as coarse control granularity, and because most methods use the hop-by-hop forwarding mechanism, it is difficult to achieve effective use of global resources

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