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 paper provides a through analysis of electromagnetic fields harvesting efficiency. We show that harvesting of energy only from ambient sources implies significant limitations in applications with strong QoS requirements, such as modern wireless body-area networks (WBANs). The joint usage of ambient and dedicated sources can enhance the capabilities of EH-supplied WBANs. We also discuss the influence...
In this work we analyze a coding scheme for an Suser multiple access channel proposed in [1]. For this scheme we consider a maximum likelihood receiver and find a closed-form expression for an upper bound of its error rate. Basing on this result we propose improved sum rate estimation for the scheme.
We consider centralized wireless networks for users of video streaming services. If the network is congested, wireless channel resources can be insufficient to satisfy all user requests. In this case QoE with some users may heavily degrade (video playback may periodically interrupt due to rebuffering effect, or startup buffering can take an intolerably long time). These negative effects can be partly...
In the paper we consider tree-based L-level convergecast networks, in which leaf nodes correspond to data sources (DS), a root node - to a base station (BS), and other nodes - to intermediate repeaters (IR). At a startup phase each DS generates a random number of messages for transmission to a BS. For such a model a lower bound for an average duration of collision-free convergecast is given. Also...
This paper focuses on the research of centralized wireless networks where main load is formed with on-line video streaming services. In case of congestion channel resources are not enough for satisfying all the users requirements. This brings to degradation of video playback (appearance of rebufferings, forced transcoding to lower bit rate etc). Congestion has probabilistic nature, since it depends...
Development of miniaturized communication systems for exchanging data over short distances with little power consumption is an actual problem. This problem is solved by such standards as Bluetooth, ZigBee etc. Nowadays for extra size devices with power supply from external electromagnetic field are considered. In the paper we propose using nonlinear scattering effect for reusing energy radiated with...
Data gathering sensor network is considered in the paper. In these networks each node is used both as source of data and as retransmitter of packets, going from other nodes. A few important parameters of sensor network (such as lifetime, data rate, channel utilization etc.) depend on chosen routing scheme. Incorrectly chosen scheme results in appearance of bottle-necks, which can highly delay data...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.