The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, a novel measurement data management system, based on cloud technology, is proposed. The system aims at maximizing the potential of the information assets of large electronic manufacturing companies through the collection, management and analysis of the so called Big Data generated by means of test processes, performed during the life-cycle of the products.
We present a software tool able to help planning and deployment of wireless sensor networks (WSN) in an outdoor environment. The tool is based on a ray-tracing algorithm for the evaluation of electromagnetic propagation in a built-up area, and on additional software modules that use the output of the electromagnetic solver to generate nodes' connectivity matrix, to compute individual nodes' coverage...
Software Defined Networks (SDN) offers the opportunity to drive down costs through increased operational efficiency—network utilization in particular—service creation velocity, and differentiated and personalized network services. This way the CAPEX and OPEX costs for the operator are going to be drawn down and same way costs will be drawn down for the end user. In the context of UNIFY project [1],...
In this paper, we study the performance of a combined scheduling algorithm for the downlink of an OFDMA point to multipoint wireless system. The proposed scheduling scheme consists mainly of a resource allocation, and subcarrier assignment mechanism combined with the queue management. This cross-layer approach allows one exploiting jointly the channel-related knowledge and data-related information...
In this work, we have implemented a data recovery software integrating the most recent rateless codes, i.e., RaptorQ codes. Thanks to the above-mentioned software, it is possible to recover data loss occurring on several kinds of network conditions. We have performed a statistical analysis of failure probabilities at several configurations of RaptorQ parameters. We have found a good agreement with...
Mobile infrastructure and in particular radio access network (RAN) sharing is becoming an important topic that mobile network operators are evaluating and considering in their expansion plans and investments decision. The arguments for network sharing are well known. It can substantially reduce CAPEX and OPEX, potentially increase the speed of network rollouts, improve coverage and help meet the capacity...
This paper presents a preliminary work based on the idea of offloading part of the traffic carried by a wireless multi-hop backbone on the lamp posts on a urban street to improve its throughput. Under some circumstances one or more nodes of the backbone may be congested, this could lead to packet losses. In order to overcome this situations, the backbone may decide to offload part of its traffic to...
In this manuscript, a Geostationary satellite-to-ground Free Space Optics (FSO) downlink channel model has been implemented, which is able to predict temporal irradiance fluctuations caused by scintillation at a wide range of turbulence conditions and for different values of the zenith angle. In order to mitigate fading events that occur in FSO communications, we have also tested the performance of...
In recent years, the monitoring of End-to-End protocols from inside the mobile data network has become a powerful tool to gain insight into subscriber specific information on usage behavior and quality of experience. With the advent of big data in mobile networks, the power of statistical data analysis can now be utilized in order to answer so far untreatable questions both in the area of network...
Since pilot based channel estimation techniques are commonly used in OFDM systems, the determination of the mean square error (MSE) in the time-frequency domain for these algorithms can provide an effective and general tool to be used to compare all the different approaches. The findings of this paper allow to determine the most suitable strategies for a given wireless channel and to identify the...
In the latest years, we have seen a fast evolution of Internet systems and a remarkable increase of the number and variety of services required. The need of new architectural solutions has led to the creation of new tools that allow to develop more flexible and dynamic networks. Software Defined Networking (SDN) goes in this direction, offering a new way to manage networks, based on programmability,...
For more than two decade now, the Brussels Regional Informatics Centre (BRIC) has been focusing on transforming the Brussels-Capital Region into a smart city by organizing, promoting and spreading the use of information and communication technologies (ICT) for the benefit of Brussels citizens, authorities, administrations, businesses and visitors. The strategy of this public interest agency is exposed...
Automatic annotation of broadcasting news programs is a challenging task for multimedia press review. Usually in a video stream, the head of a person moves continuously and changes in facial expressions, lighting conditions, and camera motion produce significant distortions in the image appearance that can largely affect recognition performances. In this paper a system for automatic face identification...
Ground-Based SAR (GB-SAR) sensors are showing to be very useful in the topographic mapping. In this context, the phase unwrapping step plays a key role in the height recover. In the recent years, multi-channel Interferometric SAR (InSAR) techniques have proved to be effective in solving the phase unwrapping problem. Maximum Likelihood (ML) and Maximum a Posteriori (MAP) based approaches exploit statistical...
This work experimentally demonstrates how to control and manage user Quality of Service (QoS) by acting on the switching on-off of the optical Gigabit Ethernet (GbE) interfaces in a wide area network test bed including routers and GPON accesses. The QoS is monitored at the user location by means of active probes developed in the framework of the FP7 MPLANE project. The network topology is managed...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.