Flexible open network operating system architecture for implementing higher scalability using disaggregated software‐defined optical networking

• DOI: 10.1049/ntw2.12110
• Publication Date: 2023-12-07T19:52:18Z
• Authors: Kenneth Nsafoa‐Ye...; Eric Tutu Tchao; Benjamin Kommey; Andrew Selasi Agb...; Griffith Selorm K...; Nana Kwadwo Akras...
• Keywords: Computer Networks and Communications; Network management; TK5101-6720; 01 natural sciences; Optical Access Networks; Security in SDN; Engineering; Optical Communication Networks and Energy Efficiency; Quality of service; 0103 physical sciences; software defined networking; FOS: Electrical engineering, electronic engineering, information engineering; Software-defined networking; Electrical and Electronic Engineering; SDN Controllers; optical communication; Computer network; Elastic Optical Networks; Scalability; Network architecture; Software-Defined Networking and Network Virtualization; Computer science; Software-Defined Networking; Distributed computing; Operating system; Microwave Photonics and Optical Access Networks; Computer Science; Physical Sciences; Networking hardware; Telecommunication; Network element

AbstractThe enhanced capacity of optical networks is a significant advantage within the global telecommunications industry. Optical networks provides transmission of information over large distances with reduced latency. However, the growing intricacy of network topologies poses a significant challenge to network adaptability, network resilience, device compatibility, and service quality in the contemporary era of technology and 5G networks. In light of these challenges, recent studies leverages on disaggregation in the context of Software Defined Network (SDN) and network service orchestrators as a viable remedy. Disaggregated optical systems offer SDON (Software‐Defined Optical Networking) enhanced control options and third‐party dynamism streamlining upgrades and diminishing single vendor dependency. Although, the advancement of disaggregation improves network flexibility and vendor neutrality of Software Defined Optical Networking (SDON), this improvement comes at the cost of reduced scalability and network controllability performance. The current research paper posits two potential resolutions to the aforementioned challenge. The authors present recommendations and an enhanced architecture that leverages Open Network Operating System (ONOS) containers and Kubernetes orchestration to improve scalability inside the Software‐Defined Optical Networking (SDON) architecture. The suggested architectural design has underlining novel flow charts and algorithms that enhances scalability performance by 33% while also preserving flexibility and controllability in comparison to pre‐existing SDON architectures. This architecture also makes use of the Mininet‐Optical physical‐layer architecture to simulate a real‐time scenario, as well as yang models from the Open Disaggregated Transport Network (ODTN) working group, the pioneers of SDONs. A detailed analysis of the rules and procedural processes involved in the implementation of the proposed architecture. In order to demonstrate the practical application of this architectural framework to a real‐world Software‐Defined Optical Network (SDON) system, the pre‐existing SDON ONOS architecture within the Optical Transport Domain Networking (OTDN) working group was adjusted and refined. This adaptation aimed to illustrate the use of ONOS in conjunction with established optical network systems, highlighting the advantages it offers.