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Invalid-Resource-Aware Spectrum Assignment for Advanced-Reservation Traffic in Elastic Optical Network.
Shufang He1, Yang Qiu1, Jing Xu2
1Key Laboratory of State Ethnic Affairs Commission for Electronic and Information Engineering, College of Electrical & Information Engineering, Southwest Minzu University, Chengdu 610041, China.
Sensors (Basel, Switzerland)
|August 1, 2020
Summary
This study introduces an Advanced-Reservation-based Invalid-Spectrum-Aware (AR-ISA) algorithm for elastic optical networks (EONs). AR-ISA improves networking performance by reducing service blocking rates and enhancing spectrum alignment.
Area of Science:
- Optical Networking
- Telecommunications Engineering
Background:
- Elastic Optical Networks (EONs) utilize Routing and Spectrum Allocation (RSA) algorithms for flexible service accommodation.
- Advanced-reservation techniques enhance RSA efficiency but often neglect unavailable spectrum resources.
Purpose of the Study:
- To propose an Advanced-Reservation-based Invalid-Spectrum-Aware (AR-ISA) algorithm for EONs.
- To improve networking performance and resource alignment by addressing unavailable spectrum.
Main Methods:
- Introduced the Invalid Spectrum Rate (ISR) index to quantify unavailable spectrum.
- Implemented a network load threshold to trigger service postponement.
- Incorporated defragmentation to increase available spectrum resources.
Main Results:
- The AR-ISA algorithm effectively reduces the service blocking rate.
- Demonstrated increased spectrum alignment rate compared to traditional methods.
- Showed improved spectrum utilization by prioritizing current path usage.
Conclusions:
- The AR-ISA algorithm offers a novel approach to resource allocation in EONs.
- Addresses limitations of existing advanced-reservation RSA algorithms.
- Significantly enhances overall network performance and resource management.
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