Dynamic QoS Management in Reconfigurable Optical Data Center Networks for Cloud-Centric Computing

Sougata Bera; Chandi Pani

doi:10.71097/IJSAT.v16.i4.9265

Dynamic QoS Management in Reconfigurable Optical Data Center Networks for Cloud-Centric Computing

Author(s)	Mr. Sougata Bera, Prof. Dr. Chandi Pani
Country	India
Abstract	The exponential growth of cloud-centric and real-time applications has revealed the inherent limitations of conventional electrical packet-switched Data Center Networks (DCNs), which suffer from bandwidth bottlenecks, high latency, and inefficient resource utilization. Optical circuit-switched DCNs offer superior bandwidth and data rates; however, their slow reconfiguration times restrict their applicability in dynamic, heterogeneous traffic environments. To address these challenges, this paper presents a Dynamic QoS Management Framework within a Reconfigurable Optical DCN Architecture designed for adaptive traffic control and efficient resource allocation. The proposed system, termed the Passive Optical Data Center Switch (PODS), integrates Arrayed Waveguide Grating Router (AWGR) technology with an intelligent control unit capable of real-time traffic classification, buffer reuse, and heuristic-based path optimization. A loopback-enabled reconfiguration mechanism dynamically reallocates optical paths, alleviating congestion and ensuring consistent QoS across diverse service classes. Extensive simulations—implemented in Python on the Google Colab platform—demonstrate that PODS achieves a 46.3% reduction in latency and a 5% improvement in network load compared to the existing Passive Optical Data Center Architecture (PODCA). A hardware prototype comprising 7 Top-of-Rack (ToR) switches and Raspberry Pi-based control modules, interconnected via 112 optical links across 16 wavelengths, further validates the design. Experimental results confirm an 18.3% reduction in blocking probability and zero blocking for high-priority traffic under full load, highlighting the architecture’s real-time adaptability. By combining passive optical components with intelligent QoS-aware control, PODS delivers a scalable, energy-efficient, and latency-optimized solution for next-generation data centers. This work establishes a foundation for self-adaptive optical DCNs capable of meeting the stringent performance and reliability demands of cloud-centric computing environments.
Keywords	Optical DCN, AWGR, QoS Provisioning, Wavelength Assignment
Field	Computer > Network / Security
Published In	Volume 16, Issue 4, October-December 2025
Published On	2025-11-07
DOI	https://doi.org/10.71097/IJSAT.v16.i4.9265
Short DOI	https://doi.org/g99qkj

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Dynamic QoS Management in Reconfigurable Optical Data Center Networks for Cloud-Centric Computing

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