In this work package, an investigation about the requirements takes place and the specifications are defined about the optical and electrical sub-systems that will consitute the units of the nodes and of the netire network, as well.
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Welcome to project UVICON
The target of the national project DiffUsed UltraViolet WIreless COmmunication Network (UVICON) is to design and develop an optical wireless network operating at 265 nm with diffused Non-Line-of_Sight (NLOS) enmissions
Partners at a glance
Brief information about UVICON
The target of UVICON project is the research and deployment of a wireless network with diffuse optical transmissions of signals using wavelengths around 265 nm as carriers for covering short distances. With such a network, significant limitations of wireless microwave networks can be encountered effectively, such as the decreased throughput plus the increased interference in areas with large density of users and the multipath fading. Additionally, the proposed network encounters effectively the limitations of near-infrared optical wireless transmissions, such as the background noise due to the sun. For ranges of tens of meters per link, the regime of diffuse emissions offers the chance to deploy a network without the requirement of strict alignment between transmitters and receivers, without multipath fading, with minimized electromagnetic interference, secure transmissions, robustness against atmospheric conditions variations and low background noise. The low background noise for this part of ultraviolet spectrum near the earth's surface is the result of the severe absorption of the sun radiation by the ozone layer in the atmosphere.
The supported rates are low (kilobit/s order). The fundamental mechanism on which the system of diffuse transmissions is based is the scattering of atmosphere, which is favored by the low wavelengths values. However, the diffuse transmissions in the wireless medium will result in increased losses, but this regime allows the covertness of data, as eavesdropping and intended interference cannot be achieved easily from large distances. Moreover, a denser atmosphere results in more intense scattering due to the appearance of more scattering centers, which means that the power losses get decreased for short ranges.
The expected result is the development of novel technology in the area of communications and networks that can be exploited in autonomous sensor networks for conventional, industrial or military applications in electromagnetically polluted environments and/or under the increased requirement of secure data emissions. This technology can be applied in internal or external areas, even under variable weather conditions.
Work Packages (WPs)
In this work package, an investigation about the requirements takes place and the specifications are defined about the optical and electrical sub-systems that will consitute the units of the nodes and of the netire network, as well.
In this work package, the theoretical surveys take place that concern (i) the attributes of the wireless medium and their impact on the impulse response of the channels that are configured, (ii) the performance of the modulation formats considering transmissions in two-points links for the channels that were modeled, (iii) the performance of the multiple access schemes depending on the topology and the nodes shape and form. These surveys will set the guidelines for the implementation of single links between network nodes.
In this work package, the parts of emissions and receptions of the nodes are developed. The parts and the sub-units per node are defined in order to design the enitre nodes.
In this work package, the initial experimental stages are included. The operation of parts of the nodes is examined and the capability of the integration of the protocol in each system/nodes is evaluated.
In this work package, the prototypes are constructed based on the specifications defined in WP 1 and the designs and implementations in WP 3 and WP 4. This work package has an increased significance, as the implementation process of the prototypes will be documented suffciently. This documentation can be the keystone for further and future improvements and advancements, e.g. size reduction.
In this work package, all the measurements are included for the evaluation of the proper newtork operation. As a last stage, the measurements will take place in a physical environment.
Profile: The Optical Communications and Photonics Technology Laboratory (OPTCOMM) of the National and Kapodistrian University of Athens belongs to the Division of Communications and Signal Processing of the Department of Informatics. The Academic and Research staff (12 Professors and Associate Researchers) teams up with a number of graduate students. The laboratory activities started at the period of the first rapid expansion of optical communications in the beginning of the eighties. The first research activities of the group were focused in the field of analogue and digital optical transmission systems. The research was developed, progressively, towards some of the most advanced fields of optical communications such as optoelectronic integration, WDM and OTDM techniques, high bit rate communications of very long distances with optical solitons etc. These activities were enhanced through co-operation with other European Partners (Industries, Universities and Research Institutes) within the framework of more than ten RACE, ACTS, and IST programs, but also by undertaking projects sponsored by the Hellenic Telecom, the National Commission of Research and Technology and the local industry. Since 1998, the Laboratory belongs to a national network of certified test and measurement laboratories. In the year 2000 the Laboratory has been certified with the ISO 9002 certificate for optical power and spectral measurements as well as OTDR calibration. Today, the research activities of the Laboratory cover mainly the following areas: Photonic Devices and Integrated Circuits, Fiber Optics and High Speed Communication Systems, Optical Networks and Techno-economic Evaluation of Telecommunication Systems. Indicatively, several successful European projects OPTCOMM has taken part in with significant contribution are the following: FP5 OCCULT, FP6 PICASSO, FP6 WAPITI, FP7 PHASORS, FP7 FAST-DOT, FP7 ONWINGS, FP7 CLARITY, FP7 InAips, FP7 DOGGIES, European Space Agency projects and GSRT projects CONECT and EEONPO.
Role in the project: OPTCOMM is the Coordinator of UVICON. Moreover, in UVICON, OPTCOMM investigates the modulation formats and the protocols for multiple access in the wireless medium in order to define the solution that is adopted in UVICON. It specifies, designs, develops, and tests not only several parts of the hardware of the nodes of UVICON, but also the software that lays above hardaware and controls the entire operation of the nodes. It also takes part in the final tests of the nodes prototypes and sets the scenaria of the network operation.
Funding: 344,800.00 €
Profile: LINK S.A. has been active in the telecommunications business since 1990, specializing, mainly, in access IP network equipment and Optical Fiber Networks & Accessories. Initially, the company was aiming at the market of optical passive equipment, the representation of international vendors of optical fibers fabrication, the production of optical distribution panels and of specialized interconnection cables (pigtails, patch cords etc.) and finally the representation of international vendors of special measurement equipment and of cabling structure verification. By the end of 90s, the company extended the activities in the optical backbone networks construction. At that moment, company started to implement complete supply, installation and maintenance projects regarding cabling structures. On 2004, Link S.A. is involved in the field of active equipment, aiming mainly on the broadband networks and specializing on the last mile access technologies. Based on the existing experience and aiming always on relevant fields of activity, Link S.A. provides complete, reliable, efficient and advanced telecommunications solutions of a very high standard.
Site: http://www.linksa.gr/
Role in the project: in UVICON, Link S.A. tkaes part in the design and development of the prototypes of the nodes of UVICON. It leads the final part of the evaluation of the nodes and network operation.
Funding: 197,000.00 €
Publications
Files you can DOWNLOAD
Video of UVICON in action
Contact details.
Prof. D. Syvridis
Optical Communications and Photonics Technology Laboratory National and Kapodistrian University of Athens Dept. of Informatics and Telecommunications Panepistimiopolis, Ilissia, Athens GREECE Postal code: 15784 Tel: +30 210 727 5322 email : dsyvridi@di.uoa.gr
Link S. A.
Markou Mpotsari 47 Athens-Aigaleo, Greece Postal code: 12242 Tel: +30 210 9411311 email : info@linksa.gr |
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