A SDN controller deployment method under the constraints of user survivability

Abstract

The present invention claims to protect a SDN controller deployment method based on user survivability constraints, which is applied to the deployment of two-layer SDN controllers. In order to reduce the transmission delay of the controller as much as possible and reduce the number of controllers on the control plane under the premise of satisfying the survivability requirements of the user for the control plane, the present invention negotiates with the user to provide an acceptable control channel routing failure probability P calculates the allowable maximum control channel routing length W under this deployment method, which is used as a constraint condition for the deployment of the secondary controller. Under the premise that the direct connection distance between the secondary controller and the SDN switch node to which it belongs does not exceed W, preferentially select the deployment node with the largest overall out-degree of the controller set in the part of the network node graph as the secondary controller, and complete the secondary controller. After the deployment of the first-level controller, the average round-trip delay and the average number of optional paths in the actual network are used as joint judgment conditions to determine the deployment location of the first-level controller, and complete the deployment of the entire control plane.

Description

technical field [0001] The invention belongs to the part related to the cross-layer survivability design of the control plane in the software-defined optical network, and specifically relates to the deployment method of the two-layer SDN controller that combines regional control and centralized control in the control plane. Background technique [0002] In recent years, with the rapid growth of user demand for high-traffic consumption Internet applications such as online video and voice calls, the optical network infrastructure, which bears the main traffic pressure in the network, is facing huge challenges: on the one hand, the network transmission capacity is required to change. On the other hand, it requires more real-time and flexible network management and control. [0003] As a brand-new network architecture, Software Defined Networking (SDN) realizes the separation of network control plane and data plane, and realizes unified and flexible management and control of the...

AI Technical Summary

Problems solved by technology

This deployment method greatly improves the survivability of the control plane, but there are relatively many controller deployment nodes

Another example document[ L F and OLIVEIRA R R. Survivor: An enhanced controller placement strategy for improving SDN survivability[C]. IEEE Global Communications Conference, Austin, USA, 2014:1909-1915.] Using the SVVR (SurViVoR) algorithm to determine the deployment scheme of the controller, the The algorithm maximizes the number of paths between the SDN switch node and the SDN controller that satisfy link separation, but does not consider the length of the control link, which may cause excessive control delay in practical applications

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