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We developed a techno-economic network planning tool for deployment of PON networks in large cities involving hundreds of thousands of end-users. The tool use techno-economic data and street-aware algorithms to estimate the global cost of the network. In the present new work, we extend the application scenario of our planning tool to estimate the increase of cost when different types of protection...
Traffic monitoring is an essential task for network operators since it allows evaluating network performance. Monitoring data from origin-destination (OD) traffic in core virtual network topologies can be collected from packet nodes and stored in a repository for further analysis, e.g., to detect anomalies or to create predicted traffic matrices for the near future. In this paper we propose a set...
Aiming at satisfying in a cost-effective manner the forecast traffic growth that future mobile networks will need to support, traditional distributed Radio Access Networks (RANs) are evolving towards centralized architectures. Specifically, the Cloud-RAN (C-RAN) architecture has shown that can alleviate to some extent the ever increasing Total Cost of Ownership in mobile networks. The current trend...
The communication properties of the white Light Emitting Diodes (LED) above all depend on a phosphor decay. This article describes the measurement of rise and fall times of white light created by the blue LED and the YAG:Ce phosphors. Measured rise and fall times are compared to rise and fall time of the blue LED. We tested four kinds of phosphors which are able to create a white light. The phosphors...
In this paper a new RMLSA (Routing, Modulation Level, and Spectrum Assignment) algorithm is presented. The proposal leverages on the potential usage of intermediate modulation format conversion to increase the optical reach or being able to use route segments with lower available capacity.
In an age where we get swamped by big data, new machine learning techniques for efficient high-speed data processing become more important than ever. One of these techniques, known as reservoir computing, is specifically designed for processing time-dependent data. We propose some new ideas for implementing such a reservoir computer on a silicon photonics chip for low-power and high-bandwidth optical...
Ultra-Dense Wavelength Division Multiplexing (UDWDM) is a candidate for future Passive Optical Networks (PONs) to sustain the increase of access traffic, providing enhanced capacity with point-to-point logical connections while introducing the Wavelength-To-The-User (WTTU) concept. This is enabled by low cost coherent transceivers with high sensitivity, also furnishing increased splitting ratio and...
The introduction of new services requiring large and dynamic bitrate connectivity can cause changes in the direction of the traffic in metro and even core network segments along the day. This leads to large overprovisioning in statically managed virtual network topologies (VNT), designed to cope with the traffic forecast. To reduce expenses while ensuring the required grade of service, in this paper...
The rapidly growing demand for higher data rates in optical access networks, backplanes, memories, on-chip CPU, and chip-to-chip optical interconnects requires novel ultra-high bit rate sources, which are more energy efficient per bit than anything presently existing. A low-cost method to adjust the mirror reflectivity of vertical-cavity surface-emitting lasers (VCSELs) helps to optimize their cavity...
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