# Improving the Survivability of Clustered Interdependent Networks by Restructuring Dependencies

## TL;DR

This paper presents an optimization approach to restructure dependencies in interdependent networks, significantly enhancing their survivability while maintaining continuous system availability during the process.

## Contribution

It introduces a novel algorithm that optimizes dependency restructuring in interdependent networks, ensuring system survivability without downtime.

## Key findings

- Restructuring dependencies improves network survivability.
- The algorithm maintains continuous system operation during restructuring.
- Simulation shows substantial survivability enhancement.

## Abstract

The interdependency between different network layers is commonly observed in Cyber Physical Systems and communication networks adopting the dissociation of logic and hardware implementation, such as Software Defined Networking and Network Function Virtualization. This paper formulates an optimization problem to improve the survivability of interdependent networks by restructuring the provisioning relations. A characteristic of the proposed algorithm is that the continuous availability of the entire system is guaranteed during the restructuring of dependencies by the preservation of certain structures in the original networks. Our simulation results demonstrate that the proposed restructuring algorithm can substantially enhance the survivability of interdependent networks, and provide insights into the ideal allocation of dependencies.