Software-defined optical network controller deployment method based on multipath survivability protection

Abstract

The invention discloses a software-defined optical network controller deployment method based on multipath survivability protection, belongs to the technical field of networks, and is applied to deployment of a two-layer SDN (Software Defined Network) controller. On the premise that the survivability requirement of a user for a control plane is guaranteed, the situation of multi-controller multi-path collaborative management and control of exchange nodes is provided, the number of controllers is further reduced, and the control cost is further reduced. According to the method, a controller deployment scheme in which a switch and a controller have a unique link is firstly solved, the scheme contains redundant controllers, and the number of the controllers needs to be further reduced. According to the method, a posterior idea is adopted, that is, whether the fault probability of each switch is lower than the fault probability required by a user is verified according to a deployment result. The number of the controllers is gradually reduced, and the survival probability of the switch is ensured all the time until the deployment number of the controllers reaches the minimum. And finally, selecting the controller with the lowest communication time delay as a management and control center to complete the deployment work of the whole control plane.

Description

technical field [0001] The present invention belongs to the multipath survivability design part of the control plane in the software-defined optical network, and specifically relates to the deployment method of the two-layer SDN controller that integrates regional management and control and centralized management and control in the control plane. Background technique [0002] With the rapid growth of IP services, people's demand for network bandwidth is becoming higher and higher, and the requirement for dynamic allocation of network bandwidth is also becoming more and more urgent. Therefore, the optical network plays an increasingly important role in modern information technology with its powerful transmission capability. [0003] Software Defined Optical Networks (SDON) is a specific application of Software Defined Networks (SDN) at the control level of intelligent optical networks. It divides the optical network into a data plane and a control plane. Among them, the data...

AI Technical Summary

Problems solved by technology

However, this method does not take into account the situation that network nodes are controlled by multiple controllers, and fails to effectively reduce the control redundancy of the control plane, and there is still room for further optimization.

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