Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
The Internet-of-Things (IoT) envisions a world where billions of everyday objects and mobile devices communicate using a large number of interconnected wired and wireless networks. Maximizing the utilization of this paradigm requires fine-grained QoS support for differentiated application requirements, context-aware semantic information retrieval, and quick and easy deployment of resources, among...
Event monitoring is an important application of sensor networks. Multiple parties, with different surveillance targets, can share the same network, with limited sensing resources, to monitor their events of interest simultaneously. Such a system achieves profit by allocating sensing resources to missions to collect event related information (e.g., Videos, photos, electromagnetic signals). We address...
Major challenges anticipated by future mission planners comprise automated processing, interpretation, and development of intelligent decisions using large volumes of dynamically evolving structured and unstructured data, while simultaneously decreasing the time necessary to plan and replan. Motivated by the need to seamlessly integrate automated information processing and resource management for...
The PetaJakarta.org project aims at advancing our capacity to understand and promote the resilience of cities to both extreme weather events as a result of climate change and to long-term infrastructure transformation as a process of climate adaptation. PetaJakarta.org is a pioneering web-based platform that harnesses the power of social media by gathering, sorting, and displaying information about...
Crowd sourced sensing over smartphones presents a new paradigm for collecting sensing data over a vast area for real-time monitoring applications. A monitoring application may require different types of sensing data, while under a budget constraint. This paper explores the crucial problem of maximizing the aggregate data utility of heterogeneous sensing tasks while maintaining utility-centric fairness...
We consider the problem of distributed estimation of an unknown zero-mean Gaussian random variable in a bandwidth constrained network, when only partial information of observation model is available. Sensors employ uniform quantizers with variable rates and transmit their quantized observations to a fusion center (FC). Assuming the FC employs the linear minimum mean-square error (LMMSE) estimator,...
This paper studies the energy allocation for sensing and data transmitting in communication systems with energy harvesting sensor nodes. The investigated system consists of a point-to-point data transmission between two energy harvesting nodes that have limited batteries capacity and communicating over a wireless fading channel. The transmitter aims to optimize the throughput over slotted system and...
Recently, femtocell attains a lot of attention for its capability to offer extended coverage from macrocell to indoor subscribers. The deployment of Femtocell may cause Inter Cell Interference (ICI) between Femtocells and Macrocell due to the same set of frequency reuse. The characteristic of cognitive radio helps in efficiently utilizing the frequency spectrum, both in the licensed and unlicensed...
Virtualized systems such as public and private clouds are emerging as important new computing platforms with great potential to conveniently deliver computing across the Internet and efficiently utilize resources consolidated via virtualization. Resource management in virtualized systems remains a key challenge because of their intrinsically dynamic and complex nature, where the applications have...
Computing power is increasingly enabling software-based networking. Successful technologies, like Wi-Fi, can now take advantage of the state of the art approaches for software-based architectures, such as software-defined, service-centric, and information-centric networking. In this paper, we employ NovaGenesis — a future Internet architecture — as the foundation for Wi-Fi networks spectrum sensing...
In this paper, we study the optimum estimation of a continuous-time random process by using discrete-time samples taken by a sensor powered by energy harvesting power sources. The system employs a best-effort sensing scheme to cope with the stochastic nature of the energy harvesting sources. The best-effort sensing scheme defines a set of equally-spaced candidate sensing instants, and the sensor performs...
We determine the achievable distortion region when the correlated source samples are transmitted by two energy harvesting (EH) sensor nodes to the destination over orthogonal fading channels. A time slotted system is considered in which the energy and the source samples arrive at the beginning of each time slot (TS), and both the correlation between source samples at the two nodes and fading coefficients...
This paper investigates the secure information transfer issue for cognitive radio networks that have multiple non-altruistic primary users, secondary users and eavesdroppers. The design objective is to improve the secrecy rates of the primary users, and create the transmission opportunities for the secondary users. To achieve this goal, we propose to incentivize the non-altruistic users to cooperate...
The problem of finding an optimal sensing schedule for a mobile device that encounters an intermittent WiFi access opportunity is considered. At any given time, the WiFi is in any of the two modes, ON or OFF, and the mobile's incentive is to connect to the WiFi in the ON mode as soon as possible, while spending as little sensing energy. We introduce a dynamic programming framework which enables the...
Exploiting Compressive Sensing (CS) in MIMO radars, we can remove the need of the high rate A/D converters and send much less samples to the fusion center. In distributed MIMO radars, the received signal can be modeled as a block sparse signal in a basis. Thus, block CS methods can be used instead of classical CS ones to achieve more accurate target parameter estimation. In this paper a new method...
The proposed work aims to describe the “V-FIDES” project, focused on developing a new generation of agile, over-actuated, long endurance Autonomous Underwater Vehicles, for deep underwater exploration, operation and environmental monitoring. The project, co-funded by Tuscany Region (Italy), has been developed by a team lead by WASS S.p.A. (Whitehead Sistemi Subacquei, Livorno), with the participation...
In this paper, the problem of motion control for small autonomous underwater vehicle (SAUV) is addressed. Firstly, for the position detection problem of SAUV underwater sailing, the dead reckoning method based on Doppler Velocity Log (DVL), compass and depth gauge is proposed. Then, aiming at the problem of controller designing for SAUV trajectory tracking, the segmented control strategy combining...
This paper considers multiple binary hypothesis tests with adaptive allocation of sensing resources from a shared budget over a small number of stages. A Bayesian formulation is provided for the multistage allocation problem of minimizing the sum of Bayes risks, which is then recast as a dynamic program. In the single-stage case, the problem is a non-convex optimization, for which an algorithm is...
In [1], a new frame structure is introduced to improve throughput and spectrum sensing capabilities compared to conventional cognitive radio (CR) systems that use the frame structure with a periodic sensing. However, even though employing two levels of power only for primary users (PUs) can be considered for CR systems, it may not be practical as the PUs often transmit with multiple levels of power...
In the last years, Internet of Things (IoT) and Big Data platforms are clearly converging in terms of technologies, problems and approaches. IoT workloads generate a vast amount of data that needs to be stored and processed, becoming a Big Data problem. IoT devices and sensors generate streams of data across a diversity of locations and protocols that in the end reach a central platform that is used...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.