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Towards an Efficient and Exact Algorithm for Dynamic Dedicated Path Protection.

Ireneusz Szcześniak¹, Ireneusz Olszewski², Bożena Woźna-Szcześniak³

¹Department of Computer Science, Częstochowa University of Technology, 42-200 Częstochowa, Poland.

Entropy (Basel, Switzerland)

|September 28, 2021

Summary

We developed a novel, efficient, and exact algorithm for dynamic routing with dedicated path protection in optical and other discrete networks. Simulation results confirm its optimality and efficiency for large-scale problems.

Keywords:

dynamic dedicated path protection elastic optical network generic Dijkstra algorithm modulation constraints

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Area of Science:

Computer Science
Network Engineering
Telecommunications

Background:

Dynamic routing with dedicated path protection is crucial for network reliability and performance.
Existing algorithms may lack efficiency or exactness for complex network scenarios.
Growing demands for network agility and ROI necessitate advanced routing solutions.

Purpose of the Study:

To introduce a novel algorithm for dynamic routing with dedicated path protection.
To demonstrate the algorithm's efficiency and exactness through simulation.
To provide an optimal solution for resource-constrained networks.

Main Methods:

Developed a novel algorithm utilizing a generic Dijkstra algorithm on an on-the-fly generated search graph.
Conducted worst-case analysis to establish polynomial upper bounds for the search space.
Performed extensive simulations on elastic optical networks with varying node and spectrum unit counts.

Main Results:

The algorithm demonstrated efficiency in solving large-scale routing problems.
Simulation results corroborated the optimality of the algorithm's solutions.
Compared favorably against the edge-exclusion algorithm in terms of bandwidth blocking probability.

Conclusions:

The proposed algorithm offers an efficient and exact solution for dynamic routing with dedicated path protection.
It is applicable to various network types with finite, discrete resources.
The algorithm advances network operations, management, and control for enhanced performance and reliability.