Performance evaluation for an optical hybrid switch with circuit queued reservations.

Area of Science:

• Telecommunications Engineering
• Optical Networking

Background:

• Optical hybrid switches combine optical burst switching (OBS) and optical circuit switching (OCS).
• Efficient resource management and performance modeling are crucial for these switches.

Purpose of the Study:

• To develop a novel loss model for optical hybrid switches.
• To introduce and analyze the "circuit queued reservation" feature.
• To provide accurate performance metrics for both burst and circuit traffic.

Main Methods:

• Analysis using a 3-dimensional state-space Markov chain for exact results.
• Derivation of computationally scalable and accurate approximations by reducing state space.
• Evaluation of blocking probabilities, delayed circuit proportion, and mean circuit delay.

Main Results:

• The Markov chain model provides exact blocking probabilities for bursts and circuits.
• Scalable approximations accurately predict performance in large-scale scenarios.
• The "circuit queued reservation" feature's impact on delay and blocking is quantified.

Conclusions:

• The proposed loss model accurately captures the performance of optical hybrid switches with queued reservations.
• Scalable approximations facilitate practical switch dimensioning.
• The "circuit queued reservation" feature enhances wavelength utilization and service quality.