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W artykule omówiony został wpływ rozszerzeń protokołu BGP na poprawę efektywności wykorzystania tego protokołu w szczególności wewnątrz systemów autonomicznych. Ogólnie omówiono zasadę działania protokołu BGP w wersji podstawowej oraz mechanizmy polegające na wykorzystaniu dedykowanych routerów stanowiących pośredniki między pozostałymi routerami BGP znanych pod nazwą Route Reflectors (RR) oraz wykorzystaniu...
W artykule przedstawiono wyniki oceny skuteczności dwóch ataków na sieci sensorowe 6LoWPAN, w których zastosowano protokół routingu RPL. Wybrano atak umożliwiający zalewanie sieci dodatkowym ruchem sygnalizacyjnym (typu hello flood) oraz atak modyfikujący parametr określający wersję drzewa tworzonego przez protokół RPL. Oba ataki pokazały, że w przypadku ich zastosowania żywotność sieci sensorowych...
W artykule została przedstawiona koncepcja wykorzystania metody uczenia ze wzmocnieniem w sieciach SDN, w kontekście ochrony przed atakami odmowy usługi. Ponadto została przedstawiona metodyka realizacji testowania zaproponowanego systemu bezpieczeństwa. Artykuł zawiera również analizę wyników, zebranych przy wykorzystaniu opracowanego emulatora modułu uczącego.
The paper presents a method of monitoring the basic parameters of cognitive mobile ad hoc network (MANET) with opportunistic access to the spectrum. The collected parameters are based on metrics from different communications layers, combined into single utility function, being a global indicator of the network health. The proposed method was tested and validated using a real time cognitive radio network...
Cognitive Radio (CR) was designed to support flexible spectrum usage by adding spectrum sensing facilities and decision making logic to the radio devices. Cognitive Radio Network (CRN) is an extension of the CR concept to enable holistic end-to-end optimization of the network operation and services. We discuss CRN management issues in the context of military and tactical operation environments, where...
Integration of heterogeneous objects diverse in technology, environmental constraints and level of trust is a challenging issue. The paper presents a novel trust-based cognitive mechanism making the objects of IoT infrastructure capable to build their situational awareness, and use this knowledge for appropriate reaction to detected threats. We demonstrate, by simulation, the efficiency of the proposed...
Cognitive Radio is often promoted to be a promising solution for the spectrum scarcity problem. Hence, a lot of research activities in both the civilian and the military world focus on introducing cognitive radio technology into modern networks. Besides the obvious changes in the radio architecture (sensing capability, cognitive engine), this combination of technologies also poses new challenges to...
In this paper we discuss the conditions of network coding technique applicability to 6LoWPAN/IEEE802.15.4-based sensor networks. The paper shows that the network coding technique based on the COPE solution can be used in sensor network however not without constraints. The main problem concerns a limited memory of the sensor nodes, header compression used in 6LoWPAN standard and limitations in 6LoWPAN...
The increasing demand of multimedia applications requires a new behavior of routing protocols in wireless ad-hoc networks. It is necessary to support many requirements for quality of services (QoS) to meet user expectations. This paper is an analysis of the proposed quality-aware routing mechanism based on Optimized Link State Routing (OLSR) protocol, from a perspective of the network and the user...
The low power wireless sensor devices which usually uses the low power wireless private area network (IEEE 802.15.4) standard are being widely deployed for various purposes and in different scenarios both in civil and military world. IPv6 low power wireless private area network (6LoWPAN) was adopted as part of the IETF standard for the wireless sensor devices in order to decrease the IP overhead and...
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