86 research outputs found
Application of ontologies for the integration of network monitoring platforms
This is an electronic version of the paper presented at the European Workshop on Mechanisms for Mastering Future Internet, held in Salzburg on 2008This paper presents an ontology-based approach to integrate the
measurements provided by different network monitoring tools and platforms.
The combination of such measurements is valuable to network operators,
enabling the development of new management applications. The use of
ontologies provides some advantages over current syntactic solutions:
classification, inference and querying capabilities are some of them. Moreover,
they can reduce the complexity of information integration, providing solutions
that can be applied to existing network monitoring infrastructures.This work has been partially funded by the European Union
under the project FP7-MOMENT (INFSO-ICT-215225)
Preliminary deployment of Grid-assisted oceanographic applications
Abstract. Grid integration of OGS oceanographic remote instruments and coupled physical-biogeochemical model has been explored in the framework of the EC-FP7 DORII project. We discuss here the first preliminary results achieved, describing the different tools developed with the support of the project consortium. A general background of the Grid technology for the e-Science is also provided.</p
Bitloaded modified enhanced subcarrier index modulation OFDM for visible light communications
Proceeding of: 2nd International Conference on Wireless Communication Systems and Networks (MIC-Wireless 2015), Barcelona, August 7th-9th 2015This paper investigates the use of bit loading al-
gorithms in order to use ESIM OFDM in frequency selective
channels. This work focuses on maximizing the bit rate minimiz-
ing the loss of spectral efficiency because of the insertion of idle
subcarriers. Besides, the modified ESIM OFDM is generalized
to support groups of subcarriers of arbitrary size based on the
number of idle subcarriers. The effect of this generalization, as
well as the new bit distribution after using bit loading, on the peak
to average power ratio (PAPR) and the bit error rate (BER) are
analyzed. Additionally a novel way to evaluate the BER in such a
system is proposed. The proposed scheme is shown to outperform
the original ESIM OFDM performance in terms of PAPR, at the
cost of a small degradation of the BER. This improvement in the
PAPR makes the proposed scheme a good candidate for Optical
Wireless Communication (OWC) systems, andThis work has been partly funded by project TEC2014-59255-C3-3-R (ELISA
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