Abstract
This paper introduces a new solution to improve network performance by decreasing spectrum fragmentation, crosstalk interference, blocking of virtual networks, cost, and link load imbalance. These problems degrade the performance of Elastic Optical Networks with Space-Division Multiplexing. The proposed solution, called Cognitive control loop (CO-OP), is capable of identifying a set of problems and creating plans to mitigate these problems. The CO-OP comprises four functions that employ learning algorithms to identify problems and plan a series of actions to reduce or eliminate them. The results show that the CO-OP can effectively decrease up to 30% the blocking of requests and up to 50% the crosstalk occurrence compared to existing algorithms.
Highlights
This paper proposes a framework, called Cognitive control loop (CO-OP), to optimize resource allocation for Virtual Optical Networks (VONs) over Elastic Optical Networks (EONs)-Space-Division Multiplexing (SDM) networks
Different from existing solutions that propose algorithms focusing on a single KPI, we propose the CO-OP framework to support VON configuration taking into account several metrics, such as spectrum fragmentation, cost, link load balance, and crosstalk interference
KLRVM algorithm produced Bandwidth Blocking Ratio (BBR) values 50% greater than those produced by the CO-OP
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. The Wavelength-Division Multiplexing (WDM) technology, currently used in most optical backbones, allows bandwidth allocation only in a fixed amount (wavelength), which leads to inefficient use of the optical spectrum [1]. These networks typically employ Single-Mode Fibers (SMF), whose capacity will be exhausted in the near future due to network traffic growth. The configuration of Virtual Optical Networks (VONs) initiates upon the arrival of a request, including the mapping of virtual nodes to physical nodes and virtual links to lightpaths [9,10,11,12]. This paper proposes a framework, called Cognitive control loop (CO-OP), to optimize resource allocation for VONs over EON-SDM networks.
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