SDN controller deployment method based on user survivability condition constraint

Abstract

The invention claims an SDN controller deployment method based on a user survivability condition constraint. The SDN controller deployment method is applied to deployment of a two-layer SDN controller. On the premise that the survivability requirement of a user for a control plane is met, controller transmission time delay is reduced as much as possible, and number of controllers of control planeis reduced. The maximum allowable control channel route length W under the deployment method is calculated through the acceptable control channel work route fault occurrence probability P given afternegotiation with a user, and the maximum allowable control channel route length W is used as the constraint condition of secondary controller deployment. On the premise that the direct connection distance from the secondary controller to the SDN switch node to which the secondary controller belongs does not exceed W, the node with a large total number of degrees is preferentially selected from thecontroller set in the part of the network node graph as the deployment node of the secondary controller; and after the deployment of the second-level controller is completed, the deployment positionof the first-level controller is determined by taking the average round-trip time delay and the average optional path number in the actual network as joint judgment conditions, and the deployment workof the whole control plane is completed.

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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