Temat: network management - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Self-organization and Routing Algorithms for the Purpose of the Sensor Network Monitoring Environmental Conditions on a Given Area
Autorzy:: Bronk, K.
Lipka, A.
Wereszko, B.
Żurek, J.
Żurek, K.
Powiązania:: https://bibliotekanauki.pl/articles/307916.pdf
Data publikacji:: 2016
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: network management
network self-organization
sensor networks
Opis:: The article describes an implementation of wireless sensor network (WSN) based on the IEEE 802.15.4-2006 standard, which was designed to monitor environmental conditions (e.g. temperature, humidity, light intensity, etc.) on a given area. To carry out this task, a self-organization algorithm called KNeighbors was selected. It exhibits low computational complexity and is satisfactory with respect to energy consumption. Additionally, the authors proposed a novel routing algorithm and some modifications to the MAC layer of the IEEE 802.15.4 standard. The article discusses the selected algorithms and procedures that were implemented in the network.
Źródło:: Journal of Telecommunications and Information Technology; 2016, 4; 39-52
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Automatic tactical network node configuration with XML and SNMP
Autorzy:: Małowidzki, M.
Bereziński, P.
Powiązania:: https://bibliotekanauki.pl/articles/308089.pdf
Data publikacji:: 2008
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: network management
network configuration
tactical network
SNMP
NETCONF
Opis:: In the paper, we describe a "plug-and-play" configuration of nodes of a tactical network on the basis of XML configuration templates and a network plan, developed during the network planning process. We present the concept of a configuration repository, an XML-based database that stores network structure and configuration data, and describe how the Simple Network Management Protocol is used to apply the settings to network devices. We also comment on a possible use of the next-generation NETCONF protocol for such a task.
Źródło:: Journal of Telecommunications and Information Technology; 2008, 2; 84-87
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Optimized Energy Aware Resource Allocation Algorithm Using Software Deﬁned Network Technology
Autorzy:: Al-Musawi, Ranya
Al-Khatib, Obada
Powiązania:: https://bibliotekanauki.pl/articles/309122.pdf
Data publikacji:: 2019
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: computer network management
network servers
software defined networking
virtual machines
Opis:: The number of data centers (DCs) used for storing and processing data has evolved rapidly in recent years. However, the operations held by DCs may relate to a number of disadvantages, primarily presuming in excessive energy and power consumption due to the poor management standards applied. This may lead to a situation in which many devices within the DC operate at full capacity without any tasks assigned for actual execution. A Software Deﬁned Network (SDN) is a network architecture where the control plane is an independent entity from the data plane, yielding to a higher controllability and ﬂexibility over the network. Through the utilization of SDN architecture, a highly functional energy aware network may be established. In this paper, we propose a heuristic algorithm that monitors the current status of an SDN network (in addition to all ingoing and outgoing trafﬁc), in order to dynamically and eﬃciently allocate network resources by ensuring that only the necessary network devices are active and by turning the idle ones oﬀ. The results show that the proposed algorithm reduces energy consumption of the network compared to existing solutions.
Źródło:: Journal of Telecommunications and Information Technology; 2019, 2; 83-91
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: A Comparison Study of DASH Technique by Video Streaming over IP with the Use of RTP and HTTP Protocols
Autorzy:: Hoppe, Christian
Uhl, Tadeus
Powiązania:: https://bibliotekanauki.pl/articles/309066.pdf
Data publikacji:: 2020
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: H.265
IP network technology
MPEG-DASH
network management
QoS measurement
video streaming
Opis:: Today’s Internet knows no bounds. New applications are marketed every single day. Many of them incorporate video sequences. These must be transported over the Internet quickly (often in real time). However, the Internet has not been designed for live communications and, regrettably, this may become apparent all too quickly. Countermeasures are required in the form of new, eﬃcient transport techniques facilitating online video services. MPEG-DASH is one of such modern techniques. But how good is this new technique really? This paper delves into the matter. The paper contains an analysis of the impact that the new technology exerts on the quality of video streaming over IP networks. It also describes a new numerical tool – QoSCalc (DASH-HTTP) which has been used to analyze MPEG-DASH under diﬀerent use scenarios. The results are presented graphically and their interpretation is provided
Źródło:: Journal of Telecommunications and Information Technology; 2020, 1; 70-75
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: A concept of Differentiated Services architecture supporting military oriented Quality of Service
Autorzy:: Kwiatkowski, M.
Powiązania:: https://bibliotekanauki.pl/articles/307725.pdf
Data publikacji:: 2003
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: quality of service
military networks
differentiated services
bandwidth brokerage
policy based network management
Opis:: This paper presents a concept of IP Differentiated Services (DiffServ) architecture in conjunction with bandwidth brokerage and policy based network management, all aimed at efficient and flexible provision of the military oriented Quality of Service (M-QoS) features in the Australian Defence (strategic) wide area network and its satellite trunk interconnections with the tactical domain. Typical DiffServ functions are analysed in the paper with regard to their roles in offering M-QoS. Some preliminary simulation results of applying these mechanisms to achieve traffic policing and differentiation for (UDP) video traffic streams, are also presented. Finally, the paper proposes the use of bandwidth brokerage in each DiffiServ domain to facilitate automatic Service Level Specification (SLS) arrangements with end-user applications, and policy based network management to support the flexible implementation of bandwidth brokerage.
Źródło:: Journal of Telecommunications and Information Technology; 2003, 2; 71-76
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Labeling of signals in optical networks and its applications
Autorzy:: Borzycki, K.
Powiązania:: https://bibliotekanauki.pl/articles/308136.pdf
Data publikacji:: 2004
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: optical fiber transmission
transparent optical network
pilot tone
network management
overhead data channel
optical fiber dispersion
optical label
Opis:: The paper is a review and comparative analysis of most common techniques proposed to attach additional data or identification information to digital signals in optical fiber networks by purely optical means. Such "labels" or "headers" can be attached either to continuous bit streams, e.g., in SDH networks or to optical packets. They enable to monitor, route and identify signals in transparent optical networks, especially those with optical wavelength multiplexing, allow management and supervision of remote optical amplifiers and can be used in optical switching systems. Other applications of this relatively unknown technology include monitoring of optical path dispersion, equalization of channels in DWDM systems and detection of intrusion or jamming in highly secure networks.
Źródło:: Journal of Telecommunications and Information Technology; 2004, 2; 73-88
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: RED-LE: A Revised Algorithm for Active Queue Management
Autorzy:: Hassan, Samuel O.
Powiązania:: https://bibliotekanauki.pl/articles/2142301.pdf
Data publikacji:: 2022
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: active queue management
network congestion
router
RED-LE
simulation
Opis:: The random early detection (RED) algorithm was developed in 1993. Nearly three decades later, several improved variants have been proposed by scientists. The use of a (pure) linear function for computing packet drop probability has turned out to be a disadvantage, leading to the problem of large delays. Such a problem may be addressed by using linear and non-linear (i.e. as exponential) packet drop probability functions. This paper proposes a revised RED active queue management algorithm named RED-linear exponential (RED-LE). This variant involves an interplay of linear and exponential drop functions, in order to improve the performance of the original RED algorithm. More importantly, at low and moderate network traffic loads, the RED-LE algorithm employs the linear drop action. However, for high traffic loads, RED-LE employs the exponential function for computing the packet drop probability rate. Experimental results have shown that RED-LE effectively controls congestion and offers an improved network performance under different traffic loads.
Źródło:: Journal of Telecommunications and Information Technology; 2022, 2; 91--97
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Interference Management using Power Control for Device-to-Device Communication in Future Cellular Network
Autorzy:: Nugraha, T. A.
Pamungkas, M. P.
Chamim, A. N. N.
Powiązania:: https://bibliotekanauki.pl/articles/958069.pdf
Data publikacji:: 2018
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: cellular network
device-to-device communication
interference management
power control
Opis:: There are many scenarios that have been proposed for ﬁfth generation (5G) networks. Some of them, if implemented, will bring fundamental changes at the architectural and node level. One example of such proposed technologies is device-to-device (D2D) communications which will change the nature of conventional cellular network design. D2D permits direct communication between two or more user devices without intervention of the base station (i.e. eNB). D2D can ensure network performance improvement over the traditional cellular network, because it can oﬄoad the mobile data trafﬁc from the other devices. However, applying D2D features in a cellular network will bring about more complex interference problems, since D2D communication uses the same band as its underlying cellular communication network. The aim of this research is to investigate interference-related problems caused by D2D communications, aﬀecting the underlying cellular networks, during downlink and uplink transmissions. The paper examines the use of power control methods to mitigate interference. A comparison is oﬀered between ﬁxed power level (FC) with or without power control, and adaptive power controls using two methods (AC1 and AC2), on a base station or on each of the D2D devices, based on the measured signal to interference plus noise ratio (SINR). The simulation results show that both power control methods contribute to improvement of network performance. AC1 and AC2 can improve SINR by about 1 dB and 0.5 dB compared to FC in a downlink transmission, and by 0.5 dB in an uplink transmission.
Źródło:: Journal of Telecommunications and Information Technology; 2018, 3; 31-36
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Comparison of resource control systems in multi-layer virtual networks
Autorzy:: Dabiński, B.
Petrecki, D.
Świątek, P.
Powiązania:: https://bibliotekanauki.pl/articles/308736.pdf
Data publikacji:: 2013
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: Execution Management
MPLS
network virtualization performance
OpenFlow
parallel networks
virtual networks
virtual networks performance
Opis:: This paper describes the performance of various methods of QoS assurance for each connection in an environment composed of virtual networks and dedicate end-to-end connections inside them. The authors worked on the basis of research conducted with the use of the authorial network management system named Executed Management, which uses resources virtualization platforms VMware and Mininet for testing purposes. We briefly describe our system and techniques we used and some alternatives we tested and discarded because of their limitations. Functionality and performance of proposed solution to widespread implemented mechanisms as OpenFlow and MPLS are compared. Reasons for selecting well-known techniques to isolate networks and limit bandwidth on different levels of virtualization are considered. The purpose of this paper is to show out our studies and performance we achieved.
Źródło:: Journal of Telecommunications and Information Technology; 2013, 3; 38-47
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: An identity-based broadcast encryption scheme for mobile ad hoc networks
Autorzy:: Ng, C. Y.
Mu, Y.
Susilo, W.
Powiązania:: https://bibliotekanauki.pl/articles/309104.pdf
Data publikacji:: 2006
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: dynamic mobile ad hoc network
identity-based
non-interactive
secure communication protocol
group key management
Opis:: Dynamic ad hoc networks facilitate interconnections between mobile devices without the support of any network infrastructure. In this paper, we propose a secure identity-based ad hoc protocol for mobile devices to construct a group key for a setup of a secure communication network in an efficient way and support dynamic changing of network topology. Unlike group key management protocols proposed previously in the literature, mobile devices can use our protocol to construct the group key by observing the others' identity, like the MAC address, which distinguishes the device from the others. In contrast to other interactive protocols, we only need one broadcast to setup the group key and member removal is also highly efficient. Finally, we discuss the security issues and provide security proofs for our protocol.
Źródło:: Journal of Telecommunications and Information Technology; 2006, 1; 24-29
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: New Developments in a Two-criteria Approach to Dynamic Power Management in Energy-aware Computer Networks
Autorzy:: Karbowski, A.
Jaskóła, P.
Powiązania:: https://bibliotekanauki.pl/articles/309427.pdf
Data publikacji:: 2016
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: data-intensive computing
energy-aware network
energy-aware routing
dynamic power management
MIQP problems
traffic engineering
Opis:: In the paper authors continue the development of a model of dynamic power management in energy-aware computer networks, where two criteria: energy consumption and the quality of service are considered. This approach is appropriate when the routing problem with fixed demands is inadmissible. The formulation introducing edge indices is modified and tests on problems of different sizes are performed.
Źródło:: Journal of Telecommunications and Information Technology; 2016, 2; 21-25
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Techniki informatyczne a procesy transformacji zarządzania organizacją
Information technologies and transformation of organizations management
Autorzy:: Florek, J.
Klimasara, E.
Powiązania:: https://bibliotekanauki.pl/articles/317518.pdf
Data publikacji:: 2003
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: restrukturyzacja organizacji
integracja wewnętrzna
reorganizacja procesów biznesowych
reorganizacja sieci gospodarczej
działalność gospodarcza
zarządzanie przedsiębiorstwem
techniki informatyczne
organization restructuring
internal integration
reorganization of business processes
reorganization of economic network
change in business area
management of an enterprise through the use of IT
Opis:: Zaprezentowano podstawowe problemy związane z dostosowaniem organizacji (przedsiębiorstwa) do działania w warunkach konkurencji rynkowej, ze szczególnym uwzględnieniem technik informatycznych. Przedstawiono pięciofazowy model transformacji organizacji, poczynając od stosowania pojedynczych rozwiązań informatycznych, a na zmianie zakresu działania korporacji (organizacji sieciowej) kończąc. Problemy te zgrupowano wokół istotnych, z punktu widzenia powodzenia przedsięwzięcia informatycznego, obszarów formułowania strategii informatyzacji, aspektów organizacyjnych (restrukturyzacyjnych) i integracyjnych.
The paper presents basic problems of IT use experienced when adapting an enterprise to operate under market conditions and in competitive environment. Attention is paid to the role of IT in the building of strategic position of the organization and its use in a 5-phase enterprise transformation model, from use of single applications to changes in the work scope (network organization) of the corporation. These problems are grouped around areas most significant for a successful IT enterprise, concerning preparation of computerization strategy and organizational and integration aspects.
Źródło:: Telekomunikacja i Techniki Informacyjne; 2003, 3-4; 106-116
1640-1549
1899-8933
Pojawia się w:: Telekomunikacja i Techniki Informacyjne
Dostawca treści:: Biblioteka Nauki

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