Search results for "Gatto"
showing 10 items of 120 documents
RF fingerprinting for user locationing in LTE/WLAN networks
2016
Location based applications and services have become popular in many wireless communication devices. This thesis study presents a performance evaluation of Radio Frequency (RF) fingerprinting framework in heterogeneous Long Term Evolution (LTE) and Wireless Local Area Networks (WLAN) using Minimization of Drive Testing (MDT) measurements which allow automated construction of extensive RF fingerprint training databases. Utilization of MDT data could create additional opportunities for service provider and application developers. Typical RF fingerprint consist of radio measurements from multiple LTE transceiver stations and WLAN access points. Regardless environmental conditions, received sig…
Klusterointi radiotaajuuspaikannuksessa
2017
Mobiililaitteiden tarkalla paikantamisella on tärkeä rooli nykyisissä ja tulevissa langattomiin verkkoihin perustuvissa sovelluksissa. GPS-paikannus on yleisesti käytetty, mutta se suoriutuu kehnosti sisätiloissa ja saattaa ruuhkahuippujen aikana olla kykenemätön suorittamaan kaikkia paikannuspyyntöjä tehokkaasti. Mobiiliverkossa paikannus voidaan suorittaa kolmiomittauksen avulla, joka vaatii kuitenkin aktiivisen puhelun. Paikkatieto mahdollistaa verkko-operaattoreille ajantasaisen statistiikan keräämisen muuttuvassa radioverkkoympäristössä. Se auttaa myös parantamaan tilannetietoisuutta onnettomuuksien ja pelastusoperaatioiden aikana. Langattomien verkkojen massiivista dataa ei vielä ole …
Toxicity of Mining-Contaminated Lake Sediments to Lumbriculus variegatus
2021
AbstractBoreal lakes with soft water and low buffering capacity are susceptible to excess ion loading resulting from metal mining. The impact of two Finish mining sites in downstream lakes was assessed with a chronic sediment toxicity test using a laboratory-reared freshwater Lumbriculus variegatus (Oligochaeta). The test organisms were exposed to mining-contaminated natural lake sediments and hypolimnion water (HLW) or artificial freshwater (AFW) as overlying water in two independent experimental setups. In both test setups, growth and reproduction of L. variegatus were lower in sediments from the lakes receiving high amount of mining effluents from the mines nearby. In the biomining site,…
Modelling Mobile Encounter Networks
2006
This article presents mobile encounter networks, which emerge when mobile devices come across each other and form a temporary connection between them using a common short-range radio technology. Local information exchanges between mobile devices results in a broadcast diffusion of information to other users of the network with a delay. In addition to presenting the concept of mobile encounter networks, we also provide an abstract method for describing the information diffusion process inside them. peerReviewed
Distributed Resource Allocation for Energy Efficiency in OFDMA Multicell Networks with Wireless Power Transfer
2019
In this paper, an energy-efficient resource allocation problem is investigated for the wireless power transfer (WPT)-enabled OFDMA multicell networks. In the considered system, multiple base stations (BSs) with a large number of antennas are responsible to provide WPT in the downlink, and the users can recycle and utilize the received energy for uplink data transmission. The role of BS is to execute WPT; thus, there are no data transmissions in the downlink. A time-division protocol is considered to divide the time of downlink WPT and uplink wireless information transfer into separate time slots. With the objective to improve the energy efficiency, we propose the time, subcarrier, and power…
Virtual Resource Allocation for Wireless Virtualized Heterogeneous Network with Hybrid Energy Supply
2022
In this work, two novel virtual user association and resource allocation algorithms are introduced for a wireless virtualized heterogeneous network with hybrid energy supply. In the considered system, macro base stations (MBSs) are supplied by the grid power and small base stations (SBSs) have the energy harvesting capability in addition to the grid power supplement. Multiple infrastructure providers (InPs) own the physical resources, i.e., BSs and radio resources. The Mobile Virtual Network Operators (MVNOs) are able to recent these resources from the InPs and operate the virtualized resources for providing services to different users. In particular, aiming to maximize the overall utility …
Nella tela del Gattopardo: le donne di Don Fabrizio
2017
Esineiden internetin hyödyt yksilölle turvallisuuden näkökulmasta
2017
Tässä tutkielmassa esitellään esineiden internetin hyötyjä yksilölle turvallisuuden näkökulmasta. Aihe on tärkeä, sillä esineiden internet on nopeasti ja jatkuvalla tahdilla kasvava ilmiö, joka tulee väistämättä vaikuttamaan huomattavasti nykyiseen ja tulevaan yhteiskuntaan. Kehittyvien teknologioiden ansiosta lähitulevaisuudessa lähes jokainen esine voidaan yhdistää internetiin, mikä mahdollistaa valtavan potentiaalin esineiden internetin hyödyntämiselle. Tutkielmassa keskitytään esineiden internetin mahdollistamiin yksilön turvallisuushyötyihin. Tutkimuskysymyksenä on mitä eri turvallisuushyötyjä yksilö saa esineiden internetistä ja miten ne parantavat yksilön turvallisuutta. Tutkielmassa…
Advanced voice and data solutions for evolution of cellular network system
2014
Multi-Connectivity for User Throughput Enhancement in 5G Non-Terrestrial Networks
2022
To meet the increasing throughput and reliability demands, satellites may be used to complement the Fifth Gener-ation (5G) Terrestrial Networks (TNs). To increase the efficiency of the satellite communications involved, research on bandwidth-efficient techniques is needed. Multi-Connectivity (MC), where a user can be connected to multiple Next Generation Node Bs (gNBs) simultaneously, is one of such techniques. In this paper, the focus is on MC in NonTerrestrial Networks (NTNs) to improve users' experienced throughputs. First, a study of relevant specifications and algorithms is conducted. Then, the designed load-aware Secondary Node (SN) addition and traffic steering algorithms are present…