Routing method based on sdn to ensure service qos

Abstract

The present invention proposes a routing method based on SDN guaranteeing service QoS, which is used to solve the technical problems of low utilization rate of network resources and poor fault tolerance of routing methods in the prior art. Link bandwidth information and link delay information; the SDN controller obtains the candidate path set through calculation; the SDN controller obtains the network QoS evaluation parameters and weight parameters; the SDN controller calculates the weight factor of each path in the candidate path set , and sort the paths in the candidate path set in ascending order to obtain the target path set; the SDN controller obtains the optimal path from the target path set, and obtains the backup path set; The sub-optimal path is selected as the optimal path in the path collection, otherwise, the selected optimal path is encapsulated and sent to the OpenFlow switch for data forwarding.

Description

technical field [0001] The invention belongs to the technical field of computer networks, and relates to a routing algorithm in a software-defined network platform, in particular to a routing method based on SDN guaranteeing service QoS, which can be used in network communication systems with higher requirements on service quality. Background technique [0002] In recent years, the rise of various new networks such as e-commerce, mobile networks, and big data has brought great convenience to users, and at the same time, users have higher requirements for the Quality of Service (QoS) of the network. The more important QoS parameters include bandwidth, time delay, etc., and different types of services have different requirements for QoS parameters. The scalability of the traditional network architecture is poor, and the performance of the equipment is fixed and single. It is difficult to meet the QoS requirements of the current new business. Frequent communication between mult...

AI Technical Summary

Problems solved by technology

But there are still the following deficiencies: (1) This algorithm only considers the service types that require one of delay and bandwidth, but many services in the real network do not only require a QoS parameter. For services that require both bandwidth and delay, this algorithm cannot guarantee its QoS very well, and the resource utilization rate is low; (2) The result of this algorithm is only to select an optimal path and end, without considering the selected optimal path In the case of failure, in the case of the optimal path failure, the algorithm cannot successfully select the route for the business, and the fault tolerance performance of the algorithm is poor

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