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This paper presents insights on the promises of probabilistic modeling and machine learning for fault diagnosis in optical access networks. A Bayesian inference engine, called Probabilistic tool for GPON-FTTH Access Network self-DiAgnosis (PANDA), is applied to fault diagnosis of Gigabit capable Passive Optical Networks (GPON). PANDA approach has been assessed on real diagnosis data, showing very...
Filterless optical networks based on broadcast-and-select nodes equipped with coherent transceivers can be considered as very attractive solutions for cost-effective and flexible capacity allocation in terrestrial and submarine applications. In this paper, we present an overview of the research on filterless optical networking in the last 10 years.
In large-scale data center (DC) and high performance computing (HPC) interconnect networks, end-to-end latency becomes a fatal problem due to the processing and queuing delays of electronic packet switching (EPS) at intermediate switching points. Introducing optical switching into DC and HPC networks can provide a potential solution to the latency problem by establishing low-latency optical bypass...
A Reconfigurable Radio Access Unit is presented and experimentally demonstrated. In the unit, an optical switching system is set to dynamically deliver different packets to different points in the network. The packets are transmitted wirelesslty on the Ka-band (26–40 GHz), achieving BER values below the limit for 7% of overhead. The proposed system can easily be implemented in a centralized radio...
We describe and demonstrate an approach for a hybrid optical packet switching and optical circuit switching spatial division network using homogeneous single-mode multi-core fibers. We show that this approach has potential to achieve acceptable levels of flexibility and granularity suitable for ultra high-capacity spatial division networks.
We evaluate the downstream performance of our novel interoperator fixed-mobile network sharing, in which operators exchange data in their access networks. We propose a performance evaluation algorithm, and report credible performance evaluation results obtained for 204600 randomly-generated passive optical networks. We show that with the proposed sharing, operators can increase their access network...
Optical processing of radiofrequency signals is demonstrated in this communication using photoswitches made from nitrogen ion implanted InGaAs. The sampling device shows an ultrafast picosecond response time while activated by ultra-short optical pulses or modulated optical beam centered at the wavelength of 1.55 µm. The optoelectronic device is embedded in a microwave coplanar waveguide which has...
A scalable, low-latency, high-speed, and energy-efficient datacenter network represents a key element in the deployment of cloud-oriented large-scale datacenters. Photonic switch (PS) architectures can be a solution due to the inherent benefits of optical technology. In this study, we numerically investigate the performance of a packet-switched optical network (PSON) architecture with centralized...
Next generation optical transport networks have high benchmarks for flexibility, reliability, and operational simplicity. These requirements underline a common, technology-independent orchestration paradigm that can be extended to represent and configure specific optical technology attributes. Although, orchestration is an ongoing aspect of the current optical transport network evolution, the meaning...
The forthcoming fifth generation (5G) of wireless and mobile technology is expected to use high-spectral-purity signals in the millimeter-wave (mm-W) range. The opto-electronic oscillator (OEO) is a well-known, low-phase-noise oscillator that is capable of generating high-frequency signals in the radio or microwave range, and can also be used in the mm-W range. In order to meet the high-spectral-purity...
One of the key enablers of the digital society is a highly reliable information infrastructure that can ensure resiliency to a wide range of failures and attacks. In cloud networks, replicas of various content are located at geographically distributed data centers, thus inherently enhancing cloud network reliability through diversification and redundancy of user accessibility to the content. However,...
The three-stage switching fabric of wavelength-space-wavelength architecture for elastic optical switches is considered in the paper. It serves connections which can occupy different spectrum width. The upper bound for rearrangeable condition for such switching fabric which serves a limited number of connection rates is derived and proved. The control algorithm based on matrix decomposition is also...
We investigate the problem of data-intensive vNF service chain (vNF-SC) orchestration in inter-datacenter EONs. After analyzing the NP-hardness of this problem, we solve it in a sequential manner by optimizing both the request serving sequence and the data-intensive vNF-SC orchestration. Specifically, we propose a request sorting algorithm and a data-intensive vNF-SC orchestration algorithm based...
The challenging performance targets of future 5G networks will require a radical change in the network design with a much closer interaction between wireless and optical systems. Dynamically reconfigurable time-division multiplexing (TDM) dense wavelength division multiplexing (DWDM) long-reach passive optical networks (PONs) provide a promising platform to enable the convergence of residential broadband,...
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