This article introduces a new approach in the field of network optimization based on Transmission Optimization Metric (TOM), which is aimed at improving traffic flow continuity and increasing the chances for traffic flow sustainability in a way that helps to minimize inter-packet gaps. The work is mainly focused on harsh transmission conditions in narrow-band networks. Finally, the presented approach has impact on better resource allocation as fewer attempts are necessary for successful completion of a transmission. A significant part of the article deals with parameterization of coefficients used by the TOM optimization method. Examples of analysis for several topologies of narrow-band wireless networks based on CSMA/CA and TDMA protocols are used to demonstrate various issues related to proper setting of parameters. The introduced TOM metric has the potential to become a standard for optimization, for example, in sensor networks that are characterized by the specific nature of data traffic.
This paper describes the migration of the traditional IT technologies to the Industrial Control Networks for Power Grids (ICNPG), characteristics of the typical ICNPG network and the differences between them and ICT network. We define the availability and reliability of the ICT networks and describe the current trends of the IT technologies in the ICNPG network with regarding its use in the Smart Grids. Finally, we describe the Smart Grid technology and summarize the availability and reliability of the ICNPG networks from technical studies. The comparison of ICNPG and ICT networks show that the utilization rate of ICT technologies must be determined in the Smart Grids with regard to the required availability and reliability. Ill. 1, bibl. 7, tabl. 2 (in English; abstracts in English and Lithuanian). L. Cepa, Z. Kocur, Z. Muller. IT technologijų migracija į išmaniuosius tinklus // Elektronika ir elektrotechnika. -Kaunas: Technologija, 2012. -Nr. 7(123). -P. 123-128.Aprašoma tradicinių IT technologijų migracija į elektros tinklų industrinius valdymo tinklus. Pateikiamos tipinio ETIVT tinklo charakteristikos ir jo skirtumai nuo IRT tinklo. Nustatytas IRT tinklų tinkamumas ir patikimumas bei šiuolaikinės IT technologijų ETIVT tinkluose tendencijos. Apibrėžta išmaniųjų tinklų technologija ir apibendrintas ETIVT tinklų tinkamumas ir patikimumas. Tinklų palyginimas parodė, kad IRT technologijų panaudojimo išmaniuosiuose tinkluose koeficientas turi būti nustatytas atsižvelgiant į reikiamą tinkamumą ir patikimumą. Il. 1, bibl. 7, lent. 2 (anglų kalba; santraukos anglų ir lietuvių k.).
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