Elastic Optical Network Architectures and Resource Management
Summary
Elastic optical networks (EONs) represent a transformative paradigm in optical transport, characterised by flexible allocation of spectrum, space and time resources to accommodate diverse and dynamic traffic demands. Architecturally, EONs employ a fine-granular “flexgrid” that divides the optical spectrum into variable-width slots, enabling modulation formats and bandwidth to be tailored on a per-connection basis. Space-division multiplexing (SDM), often realised through multi-core fibre (MCF) or few-mode fibre, augments capacity by introducing parallel spatial channels. Centralised control planes—frequently based on software-defined networking (SDN)—coordinate spectrum assignment, routing and grooming, while advanced algorithms manage spectrum fragmentation, crosstalk and quality-of-transmission. Resource management techniques such as defragmentation, adaptive modulation and power optimisation, and survivability provisioning combine to ensure high utilisation, low blocking probability and resilience against failures. These capabilities underpin next-generation applications from hyperscale data centres to 5G-driven metro and long-haul networks, offering a globally significant route to cost-effective capacity scaling and energy-efficient operation.
Research from Nature Portfolio
Recent studies have introduced a multi-dimensional resource integration architecture that unifies radio frequency, optical network and cloud-processing resources for cloud radio over fibre systems. An auxiliary-graph-based provisioning algorithm was developed to orchestrate end-to-end service demands, optimising path selection across RF links, optical flexgrid slots and compute nodes. Experimental validation on an SDN-controlled testbed demonstrated substantial improvements in resource utilisation, reduced path blocking probability and lower provisioning latency under heavy traffic. This work underscores the benefits of cross-domain orchestration in achieving responsive, globally optimised elastic optical networks.
Elastic Optical Network Architectures and Resource Management publication trend
The graph below shows the total number of articles in elastic optical network architectures and resource management across all publications each year (not limited to Nature Index journals).
Technical terms
Elastic optical network (EON): optical transport system that allocates spectrum in flexible, variable-width frequency slots to match connection requirements.
Flexgrid: spectral grid dividing the optical band into fine-granular slots, enabling dynamic bandwidth adaptation and modulation flexibility.
Space-division multiplexing (SDM): transmission technique employing multiple spatial channels—such as cores or modes—to scale capacity beyond single-core fibre limits.
Multi-core fibre (MCF): optical fibre containing several parallel cores within one cladding, each supporting an independent transmission channel.
Spectrum fragmentation: state in which non-contiguous free frequency slots hinder efficient allocation of new lightpaths.
Defragmentation: process of reorganising active connections to consolidate free spectrum and restore allocation efficiency.
Crosstalk: unwanted coupling of optical signals between adjacent channels or cores that degrades signal quality.
References
- Space-division multiplexing in data center networks: on multi-core fiber solutions and crosstalk-suppressed resource allocation. Journal of Optical Communications and Networking (2018).
- Crosstalk-aware spectrum defragmentation by re-provisioning advance reservation requests in space division multiplexing enabled elastic optical networks with multi-core fiber.. Optics Express (2019).
- Adapting Transmitter Power and Modulation Format to Improve Optical Network Performance Utilizing the Gaussian Noise Model of Nonlinear Impairments. Journal of Lightwave Technology (2014).
- Experimental demonstration of multi-dimensional resources integration for service provisioning in cloud radio over fiber network. Scientific Reports (2016).
- Fully-elastic multi-granular network with space/frequency/time switching using multi-core fibres and programmable optical nodes.. Optics Express (2013).
- OpenSlice: an OpenFlow-based control plane for spectrum sliced elastic optical path networks.. Optics Express (2013).
- On Energy Efficient Survivable Multipath Based Approaches in Space Division Multiplexing Elastic Optical Network: Crosstalk-Aware and Fragmentation-Aware. IEEE Access (2020).
- Techno-Economic Impact of Filterless Data Plane and Agile Control Plane in the 5G Optical Metro. Journal of Lightwave Technology (2020).
About these summaries
This Nature Research Intelligence Topic summary is created with the cited references and a large language model. We take care to ground generated text with facts, and have systems in place to gain human feedback on the overall quality of the process in line with our AI principles. We strive to create accurate and useful summaries for people unfamiliar with the research topic and that supports this goal. These pages are a beta release and will be updated as we learn how best to help people gain value from a research topic summary.
Turn complex research questions into confident strategic decisions
When you're under pressure to set direction, justify investment, or understand your competitive position, you need more than raw data — you need trusted insights you can act on.
Benchmark your performance against global peers using robust, methodologically sound analysis.
Combine quantitative metrics with qualitative expert insight to uncover strengths, gaps and emerging opportunities.
Gain tailored, decision-ready recommendations aligned to your strategic priorities.
Talk to us to learn more about our data dashboards and bespoke strategy reports.
Grow research skills, confidence and careers with training built for every stage of the research lifecycle.
Developed with Nature Portfolio journal Editors and internationally renowned experts. Discover three ways to learn:
Self-paced, online courses in convenient bite-sized units, covering key skills across scientific writing, publishing, grant writing, data analysis, and more.
Expert trainer-led workshops with hands-on exercises and real-time feedback across core research skills, delivered via interactive group sessions.
Editor-led workshops combining core principles in writing and publishing, personalised 1:1 feedback from Nature Portfolio Editors and hands-on exercises.
Explore course catalogues and workshop agendas, enquire about the options or request institutional pricing.