Search results for "tietoliikenne"

Redesign enterprise network by local Internet breakout : case study

2015

Nowadays, the popularity of cloud-based services around the web and SaaS applications are empowering customers to improve their business processes and increase user productivity while reducing the company’s IT operation costs. The local Internet breakout solution provides improved performance when accessing cloud-based applications along with a greater user experience. The reason behind this is not having data travel through the corporate WAN to access the Internet at a single point. This new network design solution not only improves user experience by lower latency when accessing the Internet, but also offloading the applications traffic from corporate WAN connections. The main theme of th…

Enhancing system level performance of third generation cellular networks through VoIP and MBMS services

2010

Resource management methods for Qos supported networks

2006

Tietoliikenne- ja tietotekniikan nopea kehittyminen avaa uusia mahdollisuuksia maailmanlaajuisesti toimiville, laitteita toimittaville ja huoltopalveluja tarjoaville yrityksille. Teollisuudessa on lähdetty hyödyntämään uusia etädiagnostiikkamahdollisuuksia, joiden avulla voidaan tarkastella, kerätä ja jopa hallita tehtaiden kunnossapitojärjestelmiä ja erilaisia prosesseja. Näin toteutettu koneen jatkuva seuranta tehostaisi huomattavasti vikojen ennaltaehkäisyä ja diagnosointia. Ongelmien sattuessa vika voitaisiin tunnistaa etäkäyttöohjelmien avulla tarkastelemalla eri parametreja.Kari Luostarinen tutki väitöskirjassaan palvelun laadun takaamista (QoS) ja resurssien hallintamenetelmiä sekä l…

Managing mobility in an always-best-connected IP network

2013

Kohti laskennallisen ajattelun osaamista : oppilaiden laaja-alaisen osaamisen edistäminen ja tieto- ja viestintätekniikan opetuskäytön vahvistaminen

2014

Unsupervised network intrusion detection systems for zero-day fast-spreading network attacks and botnets

2015

Today, the occurrence of zero-day and complex attacks in high-speed networks is increasingly common due to the high number vulnerabilities in the cyber world. As a result, intrusions become more sophisticated and fast to detrimental the networks and hosts. Due to these reasons real-time monitoring, processing and intrusion detection are now among the key features of NIDS. Traditional types of intrusion detection systems such as signature base IDS are not able detect intrusions with new and complex strategies. Now days, automatic traffic analysis and anomaly intrusion detection became more efficient in field of network security however they suffer from high number of false alarms. Among all …

Age of Information Based URLLC-enabled UAV Wireless Communications System

2022

This paper considers an unmanned aerial vehicles (UAV) communication network, where UAV operate as an aerial mobile relay between a source and a destination of the network. To capture the “timelines” of the received information at the destination node, a new performance metric named age of information (AoI) is considered. In addition, a short packet communication scheme maintains low latency in the proposed UAV wireless communication system. The finite block-length theory investigates the performances of short packet communications scheme in the UAV-assisted wireless communications system. In this paper, the Average Age of Information (AAoI) is estimated by applying the Stochastic Hybrid Sy…

Information delivery in mobile peer-to-peer networks

2007

Tietoverkot ovat tulleet osaksi arkeamme. Liikkuessaankin ihmiset ovat keskellä tietoverkkoja matkapuhelimien, kämmentietokoneiden tai muiden kannettavien päätelaitteiden kautta. WWW-palvelujen lisäksi uudempana verkkosovelluksena ovat ns. vertaisverkot, joissa kukin verkon käyttäjä voi toimia sekä tietolähteenä että tiedon käyttäjänä. Kotien ja työpaikkojen nopeat tietoliikenneyhteydet ovatkin mahdollistaneet vertaisverkkojen hyödyntämisen niin huvi- kuin hyötytarkoituksissa. Vielä toistaiseksi pieniä, mukana kulkevia laitteita ei kuitenkaan ole suurissa määrin valjastettu vertaisverkkojen käyttöön, mutta nykyteknologian mahdollistaessa tämän trendi voi kasvaa hyvinkin nopeasti. Kohtaamisv…

Enterprise Architecture : A Perspective on How Far We Have Come, and Directions for the Future

2019

Enterprise Architecture (EA) appears to retain the attention of both practitioners and researchers, as the technological complexity of organizations grows. Several researchers have noted that research on EA has been diversifying over time, leading to inconsistent use of terminologies. Further, the benefit claims and other results, rather frequently, are not based on empirical evidence. These shortfalls in research on EA impede EA from maturing as a discipline and from demonstrating its benefit claims. Although there are reasons to believe that the research on EA has progressed, the extent of the progress and the directions for future research are not evident. This study draws on a meta-revi…