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Wyniki wyszukiwania dla: communiation networks

  • RSVP-TE as a reservation protocol for optical networks

    Publikacja

    - Rok 2010

    In this paper, we consider the reservation of optical resources problem. We implement extensions for RSVP-TE (Resource ReSerVation Protocol with Traffic Engineering Extension) to achieve the new functionality for optical resources reservation. Based on ASON/GMPLS architecture we examine an open source implementation KOM RSVP-Engine and extend its functionality according to ITU-T and IETF recommendations. The transport plane consists...

  • Comparison of centralized and decentralized preemption in MPLS networks

    Publikacja

    - Rok 2007

    Preemption is one of the crucial parts of the traffic engineering in MPLS networks. It enables allocation of high-priority paths even if the bandwidth on the preferred route is exhausted. This is achieved by removing previously allocated low-priority traffic, so as enough free bandwidth becomes available. The preemption can be performed either as a centralized or a decentralized process. In this article we discuss the differences...

  • Service restoration in survivable networks under attacks

    Publikacja

    - SYSTEMS SCIENCE - Rok 2007

    W artykule dokonano porównania jakości odtwarzania usług w przeżywalnych sieciach optycznych, uszkadzanych w wyniku awarii fizycznych oraz na skutek ataków. Przeanalizowano wariant ochrony ścieżek ('path protection') poprzez wyznaczane zawczasu ścieżki zabezpieczające. Z uwagi na NP-zupełność problemu optymalizacji doboru tras w przeżywalnych sieciach optycznych, zaproponowano efektywny algorytm heurystyczny SCNDP. Autorski symulator...

  • Quality of service in optical burst switched networks

    Publikacja

    - Rok 2007

    In the paper analytical models of two service differentiation schemes for optical burst switched network: extended offset time based and PPS (Preemptive Priority Scheme) are revised. Also accordance of analytical models for those schemes is studied when complete class isolation is assumed. Furthermore authors introduce an analytical model which describes an effective degree of isolation when burst switched network employs both...

  • Cost minimisation in unbounded multi-interface networks

    Publikacja

    - Rok 2008

    W pracy badano problem odłączania niektórych urządzeń komunikacyjnych w wielointerfejsowych sieciach bezprzewodowych w taki sposób, by zapewnić realizację wymaganego grafu połączeń przy jednoczesnej minimalizacji zużycia energii. Sformułowano problem optymalizacyjny, podano wyniki dotyczące jego trudności i zaproponowano algorytmy optymalizacyjne dla wariantu, w którym liczba interfejsów komunikacyjnych jest potencjalnie nieograniczona...

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  • Quality of service in optical burst switched networks

    Publikacja

    - Theoretical and Applied Informatics - Rok 2007

    In the paper analytical models of two service differentiation schemes for optical burst switched network: extended offset time based and PPS (Preemptive Priority Scheme) are revised. Also accordance of analytical models for those schemes is studied when complete class isolation is assumed. Furthermore authors introduce an analytical model which describes an effective degree of isolation when burst switched network employs both...

  • Cluster-Dependent Feature Selection for the RBF Networks

    Publikacja

    - Rok 2015

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  • AGENT-BASED APPROACH TO THE DESIGN OF RBF NETWORKS

    Publikacja

    - CYBERNETICS AND SYSTEMS - Rok 2013

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  • Overview of Scalability and Reliability Problem in SDN Networks

    Publikacja

    - Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne - Rok 2016

    In the paper an overview of scalability and reliability in the SDN (Software Defined Networks) networks has been presented. Problems and limitations for guaranteeing scalability and reliability in SDN networks have been indicated. Known methods for assuring scalability and reliability in SDN networks have been described. Projects from research communities for resolving issues with scalability and reliability in SDN networks have...

  • Topology recognition and leader election in colored networks

    Publikacja

    - THEORETICAL COMPUTER SCIENCE - Rok 2016

    Topology recognition and leader election are fundamental tasks in distributed computing in networks. The first of them requires each node to find a labeled isomorphic copy of the network, while the result of the second one consists in a single node adopting the label 1 (leader), with all other nodes adopting the label 0 and learning a path to the leader. We consider both these problems in networks whose nodes are equipped with...

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  • Ship Resistance Prediction with Artificial Neural Networks

    Publikacja

    - Rok 2015

    The paper is dedicated to a new method of ship’s resistance prediction using Artificial Neural Network (ANN). In the initial stage selected ships parameters are prepared to be used as a training and validation sets. Next step is to verify several network structures and to determine parameters with the highest influence on the result resistance. Finally, other parameters expected to impact the resistance are proposed. The research utilizes...

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  • The Transmission Protocol of Sensor Ad Hoc Networks

    Publikacja

    - Rok 2015

    This paper presents a secure protocol for a radio Ad Hoc sensor network. This network uses the TDMA multiple access method. The transmission rate on the radio channel is 57.6 kbps. The paper presents the construction of frames, types of packets and procedures for the authentication, assignment of time slots available to the node, releasing assigned slots and slots assignment conflict detection.

  • Applying artificial intelligence for cellular networks optimization

    Publikacja
    • O. Semenova
    • A. Semenov
    • O. Bisikalo
    • V. Kucheruk
    • P. Kulakov
    • R. Romaniuk
    • P. Komada
    • K. Nurseitova
    • R. S. Romaniuk

    - Rok 2019

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  • Primary role identification in dynamic social networks

    Publikacja

    - Rok 2011

    Identyfikacja ról w sieci społecznej jest jednym z podstawowych zagadnień analizy takich sieci. W artykule przedstawiamy nowe podejście do tego zagadnienia. Pokazujemy w jaki sposób można dokonać identyfikacji ról poprzez wykorzystanie zaproponowanego modelu zachowań aktorów. Model taki tworzą podgrafy wzorcowe oraz diagramy stanów okreslające sekwencje aktywności w zachowaniu aktorów. Na bazie wyznaczonych modeli zachowań oraz...

  • Robustness in Compressed Neural Networks for Object Detection

    Publikacja

    - Rok 2021

    Model compression techniques allow to significantly reduce the computational cost associated with data processing by deep neural networks with only a minor decrease in average accuracy. Simultaneously, reducing the model size may have a large effect on noisy cases or objects belonging to less frequent classes. It is a crucial problem from the perspective of the models' safety, especially for object detection in the autonomous driving...

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  • Application of wavelength division multiplexing in sensor networks

    Publikacja

    - Rok 2012

    Over the past few years the need to acquire data on various parameters from a number of sensors grew. The need that led to the development of a network of sensors which enables simultaneous control and measurement in a wide range of applications. The aim of this article is to discuss a possibility of connecting a variety of sensors in a network that would utilize WDM technology. Wavelength Division Multiplexing is commonly used...

  • Minimization of label usage in (G)MPLS networks

    Publikacja

    - Rok 2009

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  • Traffic Remapping Attacks in Ad Hoc Networks

    Publikacja

    - IEEE COMMUNICATIONS MAGAZINE - Rok 2018

    Ad hoc networks rely on the mutual cooperation of stations. As such, they are susceptible to selfish attacks that abuse network mechanisms. Class-based QoS provisioning mechanisms, such as the EDCA function of IEEE 802.11, are particularly prone to traffic remapping attacks, which may bring an attacker better QoS without exposing it to easy detection. Such attacks have been studied in wireless LANs, whereas their impact in multihop...

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  • Cooperative Data Transmission in Wireless Vehicular Networks

    Publikacja

    - Rok 2017

    The paper presents issues related to the cooperative transmission in wireless vehicular networks. Cooperative transmission involves the use of mobile terminals as relay stations to improve the transmission quality, improve network performance and reduce energy consumption. The paper presents the methods used to implement cooperative transmission and the types of cooperative networks.

  • Annual signals observed in regional GPS networks

    Publikacja
    • J. Bogusz
    • M. Figurski

    - Acta Geodynamica et Geomaterialia - Rok 2014

    Abstract: This paper describes analyses concerning annual signals in GPS-derived coordinates. The data was processed in the Military University of Technology Local Analysis Centre with Bernese 5.0 software. We used observations from 129 permanent GPS stations which belong to the Polish Active Geodetic Network (ASG-EUPOS), for the period of GPS weeks 1465-1729, corresponding to about 5 years. The annual signals have been estimated...

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  • DETERMINATION OF VERTICAL DISPLACEMENTS IN RELATIVE MONITORING NETWORKS

    Publikacja

    - Archives of Civil Engineering - Rok 2020

    The problem of determining displacements of objects is an important and current issue, in particular in terms of operational safety. This is a requirement that covers geodetic, periodic control measurements in order to determine horizontal and vertical displacements. The paper is focused on the analysis of vertical displacements. Geodetic measurements and their interpretation allow to reduce the risk of possible structural catastrophes....

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  • Service-based Resilience for Embedded IoT Networks

    Publikacja

    - Rok 2020

    Embedded IoT networks are the backbone of safety-critical systems like smart factories, autonomous vehicles, and airplanes. Therefore, resilience against failures and attacks should be a prior concern already in their design stage. In this study, we introduce a service-based network model as an MILP optimization problem for the efficient deployment of a service overlay to the embedded network by meeting QoS and resilience requirements....

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  • Trust Management Method for Wireless Sensor Networks

    Publikacja

    - Rok 2017

    A Wireless Sensor Network (WSN) is a network of spatially distributed autonomous sensors to monitor physical or environmental conditions, such as temperature, sound, pressure, etc. and to cooperatively pass their data to the main location. The first wireless network that bore any real resemblance to a modern WSN is the Sound Surveillance System (SOSUS), developed by the United States Military in the 1950s to detect and track Soviet...

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  • Region protection/restoration scheme in survivable networks

    Publikacja

    - Rok 2005

    W artykule zaproponowano nowe podejście do zabezpieczania/odtwarzania obszarowego, gdzie scieżka zabezpieczająca chroni pewien obszar ścieżki aktywnej. Wykazano, że ta metoda utrzymuje zarówno czasy odtwarzania, jak i współczynnik wykorzystania zasobów w rozsądnych granicach. Ze względu na fakt, że zadanie znalezienia ścieżek aktywnych i ścieżek zabezpieczających jest NP-zupełne, autorzy stworzyli algorytm heurystyczny i pokazali,...

  • COMPARATIVE ANALYSIS OF ACTIVE GEODETIC NETWORKS IN POLAND

    Publikacja

    - Rok 2017

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    Czasopisma

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    Czasopisma

    ISSN: 0741-0883 , eISSN: 1552-8472

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    Czasopisma

    ISSN: 0893-4215 , eISSN: 1745-1043

  • COMMUNICATION MONOGRAPHS

    Czasopisma

    ISSN: 0363-7751 , eISSN: 1479-5787

  • Communication & Medicine

    Czasopisma

    ISSN: 1612-1783

  • COMMUNICATION THEORY

    Czasopisma

    ISSN: 1050-3293 , eISSN: 1468-2885

  • Discourse & Communication

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    ISSN: 1750-4813 , eISSN: 1750-4821

  • Communication Quarterly

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    ISSN: 0146-3373 , eISSN: 1746-4102

  • Visual communication

    Czasopisma

    ISSN: 1470-3572 , eISSN: 1741-3214

  • Communication Studies

    Czasopisma

    ISSN: 1051-0974 , eISSN: 1745-1035

  • Communication Research

    Czasopisma

    ISSN: 0093-6502 , eISSN: 1552-3810

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    Czasopisma

    ISSN: 1071-4421 , eISSN: 1547-7487

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    ISSN: 2167-4795 , eISSN: 2167-4809

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    Czasopisma

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    Czasopisma

    ISSN: 2065-7943 , eISSN: 2067-564X

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    Czasopisma

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