Dynamic lightpath provisioning with signal quality guarantees in survivable translucent optical networks

Area of Science:

• Optical Networking
• Telecommunications Engineering
• Network Survivability

Background:

• Dynamic traffic in translucent optical networks presents challenges for reliable lightpath provisioning.
• Ensuring signal quality and network survivability are critical for robust network performance.

Purpose of the Study:

• To propose and evaluate a novel regeneration-segment protection (RSP) scheme for signal-quality-guaranteed lightpath provisioning.
• To compare the performance of RSP against traditional path protection methods under dynamic traffic conditions.

Main Methods:

• Developed and presented provisioning approaches incorporating shared path protection and shared RSP.
• Integrated two key signal quality constraints into the provisioning problem.
• Employed distinct regenerator placement strategies for working and protection paths.
• Utilized a joint path selection method for optimal working-protection pair selection.

Main Results:

• The proposed RSP scheme achieved cost-effective, signal-quality-guaranteed survivable lightpath provisioning.
• RSP demonstrated a lower blocking probability than path protection in moderate-size networks with low to modest load.
• RSP provided superior recovery time performance compared to path protection across all tested network scenarios.

Conclusions:

• Regeneration-segment protection is an effective strategy for enhancing survivability and performance in translucent optical networks.
• The RSP scheme successfully addresses signal quality constraints while maintaining cost-effectiveness.
• RSP offers significant advantages over path protection in terms of blocking probability and recovery speed.