Videokonferenčni sistemi v poslovnem okolju: Nove rešitve in kvalitativna primerjava

Broadband internet is crucial for the fast development of portable, easy to use videoconferencing systems. We are analyzing 4 systems, that also support collaboration and content sharing. They differ in architecture, either centralized or P2P. Tested parameters included: time for conference setup, subjective video quality, response time when changing content etc.

Uporaba vsebinsko porazdeljenih omrežij za distribucijo video vsebin

The aim of this study is to explain the methods for video streaming. Usually, unicast and multicast techniques are used for video-on-demand and
broadcast delivery. To solve the problem of bottleneck at the centralized server networks, Peercasting and Content Distribution Networks (CDN) can be used. We explain the principles of operation and functionalities of the following into more details and examine their employment with most popular service for video delivery – YouTube and one of CDN service providers – Akamai.

Inovativni vmesniki in načini interakcij

The research area of human to machine communication and interaction is very important for enabling efficient, safe and especially easy to use interfaces with innovative ways of interaction. Not only one way of interaction or modality should be used but it is often more efficient to use a combination of multiple modalities whereas especially in conjunction with multimedia interfaces and applications gesture based communication is appropriate. Therefore a pilot and appurtenant experiment for gesture recognition was designed and performed. Thus obtained results are very positive and show great potential for future research.

Varnost v podsistemu IMS

IMS subsystem is a standardized IP-based architecture designed to enable fast service creation and delivery without compromising the accuracy of accounting or jeopardizing the security traditionally associated with telecommunication providers. Security is one of the crucial factors in commercial IMS employments. Not less important is the size of the potential user base that spans technologically very different access networks. In this article we give a very brief overview of IMS security services, characteristics of which are somewhat dependant on the access technology used. Security is not the sole factor influencing IMS employment.

Nastanek in vpliv Sončevih aktivnosti

This paper presents a basic overview of solar activities, their origin, spreading into the interplanetary space and magnetic reconnection to Earth’s primary magnetic field. The Sun’s characteristics are explained as a multilayer structure of gas forming globe with strong dynamic magnetic field. This supports different X-ray emissions and coronal mass ejections that might collide with Earth’s magnetosphere and cause various visual and other detected effects that might influence our environment, communications, technology solutions, electricity distribution and also our health.

Posvet SMARTGRIDS

Razvoj novih tehnologij in uvajanje inteligenčnih omrežij (SmartGrids) je aktualna svetovna tema na področju razvoja tehničnih sistemov. Pri tem igrajo pomembno vlogo omrežja IKT, še posebej pa telekomunikacije kot sestavni segment tega multidisciplinarnega področja.

Nacionalni komite CIGRE – CIRED je organiziral posvet o uvajanju Smart Grids v Sloveniji. Posveta, ki je potekal v Tehnološkem parku Ljubljana na Brdu 18. maja 2010, se je udeležil tudi LTFE s prispevkom:

Omrežni posrednik in povezovanje v heterogenih omrežjih

S pojavom IMS smo priče združevanju dosedanjih omrežij. Tako klasičnih omrežij SS7, omrežij odprtih vmesnikov, do mobilnih omrežij, ki so že specificirana ali pa še bodo standardizirana v okviru IMS. Ob prehodu iz nekdanjih vertikalnih v bodoča horizontalna omrežja, kjer bodo imela različna omrežja isti storitveni sloj se pojavljajo nekatera vprašanja v zvezi s povezovanjem teh omrežij.

IPv6 in Internet prihodnosti

Internetni protokol verzije 6 (IPv6) predstavlja neizogiben korak k modernizaciji zmogljivosti raznovrstnih omrežnih rešitev, s tem pa tudi omrežno tehnologijo sedanjosti in prihodnosti. Prispevek podaja celovit konceptualni pregled tehnologije IPv6 s poudarkom na tehnoloških novostih, prednostih in pomanjkljivostih, ter novih področjih aplikativne uporabe.

Pojem digitalne dividende pri razvoju širokopasovnih mobilnih omrežij

Digitalna dividenda je pojem, ki je povezan s prehodom na digitalno oddajanje televizijskih programov. Sproščeni del spektra je pogoj za razvoj novih komunikacijskih omrežij, ki bi lahko zmanjšala digitalno ločnico in omogočila dostop do interneta na podeželju.

Prehod iz HSPA na LTE

Hiter razvoj vsako leto povečuje zmogljivost mobilnih omrežij. Članek podaja nekatere razloge za LTE in vprašanja, ki se zastavljajo o tem kdaj in zakaj vpeljati LTE.