Scalable and QoS Aware Hierarchical AWGR-Based Solution for Hybrid Electro-Optic DCN Architecture

A Hybrid Electro-Optic Data Centre Network (DCN) Architecture enormously benefits network performance, scalability, and energy efficiency for cloud-centric applications in DCN. Application of Arrayed Waveguide Router (AWGR) provides a high-performance optical routing and Wavelength multiplexing capability in DCN. In this paper, our objective is to design a cost-effective, scalable, and QoS-aware hierarchical AWGR-based solution for real-time cloud-centric applications. Our proposed model enhances connectivity, reduces blocking probability, and ensures Quality of Service (QoS) compared with the limitations of single-layer AWGR implementations. To study the performance of the proposed model, an experimental setup is developed in the laboratory using the 5 Raspberry Pi module with 24 Top of Rack (ToR) switches and found 18.7% further improvement in blocking probability to single layer model.