422 research outputs found
NB-IoT: Performance estimation and optimal configuration
Full text linkNB-IoT is a new radio access technology targeting a large set of use cases for massive machine-type communications standardized by the 3GPP. Compared to human-oriented technologies, NB-IoT has been enhanced in terms of coverage and power saving capabilities while reducing the complexity at the same time. These features allow connectivity of devices in challenging positions, enabling long battery life. This paper provides an overview of NB-IoT, together with a mathematical model of the network able to predict the maximum performance in a given scenario with a specific configuration of some design parameters. Finally, we present an analysis on how these parameters affect the overall performance and how the optimal configuration may be chosen according to arbitrary criteria
Decentralized Traffic Aware Scheduling in 6TiSCH Networks: Design and Experimental Evaluation
Full text linkpeer reviewe
Bones Pràctiques cap a unes ciutats intel·ligents, més sostenibles
No full textTaula Rodona: "Presentació de bones pràctiques (segona part)
Modera: Albert Vidal, responsable de temes d'smart cities de la Fundació I2-CAT
•“Gestió remota de la flota d'autobusos”, a càrrec del Sr. Esteban de Kelety Alcaide, Director de sistemes de Moventia.
•“Sistemes de telelectura”, a càrrec de Mateu Crespí, responsable del departament de telelectura d'Agbar.
•“Viure experiències amb GPS”, a càrrec de Narcís Vives, Itinerarium.
•“Pàrquings monitoritzats”, a càrrec del Sr. Mischa Dohler, CTO de “Worldsensing” i cap de l'àrea d'Intelligent Energy (IQe) del Centre Tecnològic de Telecomunicacions de Catalunya
Bones Pràctiques cap a unes ciutats intel·ligents, més sostenibles
No full textTaula Rodona: "Presentació de bones pràctiques (segona part)
Modera: Albert Vidal, responsable de temes d'smart cities de la Fundació I2-CAT
•“Gestió remota de la flota d'autobusos”, a càrrec del Sr. Esteban de Kelety Alcaide, Director de sistemes de Moventia.
•“Sistemes de telelectura”, a càrrec de Mateu Crespí, responsable del departament de telelectura d'Agbar.
•“Viure experiències amb GPS”, a càrrec de Narcís Vives, Itinerarium.
•“Pàrquings monitoritzats”, a càrrec del Sr. Mischa Dohler, CTO de “Worldsensing” i cap de l'àrea d'Intelligent Energy (IQe) del Centre Tecnològic de Telecomunicacions de Catalunya
Implementable Wireless Access for B3G Networks - III: Complexity Reducing Transceiver Structures
No full textThis article presents a comprehensive overview of some of the research conducted within Mobile VCE’s Core Wireless Access Research Programme,1 a key focus of which has naturally been on MIMO transceivers. The series of articles offers a coherent view of how the work was structured and comprises a compilation of material that has been presented in detail elsewhere (see references within the article). In this article MIMO channel measurements, analysis, and modeling, which were presented previously in the first article in this series of four, are utilized to develop compact and distributed antenna arrays. Parallel activities led to research into low-complexity MIMO single-user spacetime coding techniques, as well as SISO and MIMO multi-user CDMA-based transceivers for B3G systems. As well as feeding into the industry’s in-house research program, significant extensions of this work are now in hand, within Mobile VCE’s own core activity, aiming toward securing major improvements in delivery efficiency in future wireless systems through crosslayer operation
Guest editorial Open RAN: A new paradigm for open, virtualized, programmable, and intelligent cellular networks
No full textInternet of Things in the 5G Era: Enablers, Architecture and Business Models
Full text linkpeer reviewedThe IoT paradigm holds the promise to revolutionize the way we live and work by means of a wealth of new services, based on seamless interactions between a large amount of heterogeneous devices. After decades of conceptual inception of the IoT, in recent years a large variety of communication technologies has gradually emerged, reflecting a large diversity of application domains and of communication requirements. Such heterogeneity and fragmentation of the connectivity landscape is currently hampering the full realization of the IoT vision, by posing several complex integration challenges. In this context, the advent of 5G cellular systems, with the availability of a connectivity technology which is at once truly ubiquitous, reliable, scalable, and cost-efficient, is considered as a potentially key driver for the yet-to emerge global IoT.
In the present paper, we analyze in detail the potential of 5G technologies for the IoT, by considering both the technological and standardization aspects. We review the present-day IoT connectivity landscape, as well as the main 5G enablers for the IoT. Last but not least, we illustrate the massive business shifts that a tight link between IoT and 5G may cause in the operator and vendors ecosystem
A Learning Theoretic Approach to Energy Harvesting Communication System Optimization
Full text linkA point-to-point wireless communication system in which the transmitter is
equipped with an energy harvesting device and a rechargeable battery, is
studied. Both the energy and the data arrivals at the transmitter are modeled
as Markov processes. Delay-limited communication is considered assuming that
the underlying channel is block fading with memory, and the instantaneous
channel state information is available at both the transmitter and the
receiver. The expected total transmitted data during the transmitter's
activation time is maximized under three different sets of assumptions
regarding the information available at the transmitter about the underlying
stochastic processes. A learning theoretic approach is introduced, which does
not assume any a priori information on the Markov processes governing the
communication system. In addition, online and offline optimization problems are
studied for the same setting. Full statistical knowledge and causal information
on the realizations of the underlying stochastic processes are assumed in the
online optimization problem, while the offline optimization problem assumes
non-causal knowledge of the realizations in advance. Comparing the optimal
solutions in all three frameworks, the performance loss due to the lack of the
transmitter's information regarding the behaviors of the underlying Markov
processes is quantified
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