Routing method capable of ensuring service QoS based on SDN

Abstract

The invention provides a routing method capable of ensuring service QoS based on SDN, used for solving the technical problem that in the prior art, a network resource utilization rate is not high andthe routing method is poor in fault tolerance. The method comprises the implementation steps as follows: a SDN controller acquires topological information, link bandwidth information and link delay information of a network; the SDN controller acquires a standby path set via computation; the SDN controller acquires a network QoS evaluation parameter and a weight parameter; the SDN controller computes a weight factor of each path in the standby path set, and sorts the paths in the stand by path set in an ascending sort to acquire a target path set; the SDN controller acquires the optimal path from the target path set, and acquires the standby path set; and the SDN controller judges whether the optimal path is faulted, if yes, the secondary optimal path is selected from the standby path set to serve as the optimal path, and otherwise, a selected optimal path packaging flow table is distributed to an OpenFlow switch to forward data.

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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