Constrained Receiver Scheduling in Flexible Time and Wavelength Division Multiplexed Optical

TL;DR

This paper introduces a novel receiver scheduling protocol for TWDM optical networks that considers multiple collision domains, significantly improving throughput and security over traditional schemes.

Contribution

It proposes a new media access control protocol that accounts for multiple collision domains in TWDM, enhancing throughput and security in flexible optical networks.

Findings

The proposed scheme achieves high throughput in simulations.

A theoretical upper bound of throughput supports the simulation results.

Complexity reduction makes the scheme practical for real-world deployment.

Abstract

An increasing bandwidth demand has mandated a shift to the time and wavelength division multiplexing (TWDM) techniques in optical access networks (OAN). Typical TWDM scheduling schemes consider scheduling of the optical line terminal receiver only. In this paper we have identified an additional collision domain that is present in TWDM schemes that offer security, in addition to bandwidth flexibility. Scheduling of the identified collision domain is termed as group scheduling. We illustrate that consideration of receiver scheduling only (as done in typical TWDM schemes) severely affects their throughput when implemented on flexible and secure TWDM architectures. A novel media access control protocol has been proposed in this paper that considers the multiple collision domains. Through simulations, we are able to illustrate that the proposed scheme achieves a high throughput. A theoretical upper bound of throughput has also been derived to explain the simulation results. Complexity reduction of the proposed scheme has been illustrated, thereby making it an attractive proposal.