Availability-Aware Dynamic RSA with Protection using Consecutive Sub-Channels

TL;DR

This paper proposes an availability-aware dynamic routing and spectrum assignment method for flexible grid optical networks, utilizing protection schemes with consecutive sub-channels to enhance survivability and resource efficiency.

Contribution

It introduces a novel heuristic approach for real-time protection provisioning using dynamic sub-channel allocation, addressing the limitations of p-Cycles in practical scenarios.

Findings

Improved protection efficiency with reduced resource wastage.

Faster protection provisioning suitable for real-time applications.

Enhanced survivability against network failures.

Abstract

Flexible grid Optical Networks provide efficient spectrum utilization by employing the mechanisms to provide flexibility in the optical channel (spectrum slot) sizes. One of the research problems in Flexible grid Optical Networks is their survivability against failure. On the other hand, p-Cycles have not found practical use due to the significant compute time required for finding optimal configuration for the size of networks seen in real-life. Therefore, for real-time scenarios, we can write heuristics which can assign protection to the new working paths without disturbing the existing traffic on all the other routes in flexible grid networks. The provisioning of protection to each link or path of the lightpath requests can be done using Dynamic Cycles (D-Cycles) or Dynamic Shared Backup Resource Protection (D-SBRP). However, protecting each link or path can lead to the wastage of the resources in the network.