Network Coding-based Protection Strategies Against a Single Link Failure in Optical Networks

TL;DR

This paper introduces network coding-based protection strategies, NPS-I and NPS-II, to efficiently safeguard optical networks against single link failures by using encoded data and reduced capacity on working paths.

Contribution

It proposes novel protection strategies utilizing network coding and reduced capacity, with detailed implementation guidance for optical networks with multiple disjoint paths.

Findings

Protection strategies effectively handle single link failures.

Reduced capacity approach optimizes resource utilization.

Implementation guidelines facilitate deployment in real networks.

Abstract

In this paper we develop network protection strategies against a single link failure in optical networks. The motivation behind this work is the fact that $%70$ of all available links in an optical network suffers from a single link failure. In the proposed protection strategies, denoted NPS-I and NPS-II, we deploy network coding and reduced capacity on the working paths to provide a backup protection path that will carry encoded data from all sources. In addition, we provide implementation aspects and how to deploy the proposed strategies in case of an optical network with $n$ disjoint working paths.