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    Wyświetlanie 1-12 z 12
    Tytuł:
    Influence of Self-Similar Traffic Type on Performance of QoS Routing Algorithms
    Autorzy:
    Czarkowski, M.
    Kaczmarek, S.
    Wolff, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/226877.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    self-similar traffic
    QoS routing
    performance
    simulation
    Opis:
    Providing a Quality of Services (QoS) into current telecommunication networks based on packet technology is a big challenge nowadays. Network operators have to support a number of new services like voice or video which generate new type of traffic. This traffic serviced with QoS in consequence requires access to appropriate network resources. Additionally, new traffic type is mixed with older one, like best-effort. Analysis of these new and mixed traffic types shows that this traffic is self-similar. Network mechanisms used for delivery of quality of services may depend on traffic type especially from the performance point of view. This paper presents a feasibility study done into the effect of traffic type influence on performance of routing algorithm while the routing algorithm is treated as one of the mechanisms to support QoS in the network.
    Źródło:
    International Journal of Electronics and Telecommunications; 2016, 62, 1; 81-87
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    DiffServ Aware MPLS Traffic Engineering for ISP Networks: State of the Art and New Trends
    Autorzy:
    Toguyéni, A.
    Korbaa, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/308811.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    differentiated service
    multipath routing
    QoS routing
    quality of service
    traffic engineering
    Opis:
    In the recent ten years, with the development of new applications through Internet such as multimedia or networked control applications, users need more and more quality of service (QoS). However, the requested QoS is not the same depending on the application. Most of the new models to manage internet traffic are based on specific QoS criteria which should be optimized. This paper presents main multiprotocol label switching (MPLS) approaches such as MPLS adaptive traffic engineering (MATE), load distribution in MPLS (LDM) and load balancing over widest disjoints paths (LBWDP) that are new models for traffic engineering. It also introduces periodic multi-step (PEMS) algorithm that adapts the offered quality depending on the class of the routed traffic.
    Źródło:
    Journal of Telecommunications and Information Technology; 2009, 1; 5-13
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The multi-constrained multicast routing improved by hybrid bacteria foraging-particle swarm optimization
    Autorzy:
    Sahoo, Satya Prakash
    Kabat, Manas Ranjan
    Powiązania:
    https://bibliotekanauki.pl/articles/305674.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    QoS routing
    multicasting
    bacteria foraging optimization
    particle swarm optimization (PSO)
    Opis:
    To solve multicast routing under multiple constraints, it is required to generate a multicast tree that ranges from a source to the destinations with minimum cost subject to several constraints. In this paper, PSO has been embedded with BFO to improve the convergence speed and avoid premature convergence that will be used for solving QoS multicast routing problem. The algorithm proposed here generates a set of delay compelled links to every destination present in the multicast group. Then the Bacteria Foraging Algorithm (BFA) selects the paths to all the destinations sensibly from the set of least delay paths to construct a multicast tree. The robustness of the algorithm being proposed had been established through the simulation. The efficiency and effectiveness of the algorithm being proposed was validated through the comparison study with other existing meta-heuristic algorithms. It shows that our proposed algorithm IBF-PSO outperforms its competitive algorithms.
    Źródło:
    Computer Science; 2019, 20 (2); 245-269
    1508-2806
    2300-7036
    Pojawia się w:
    Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fuzzy Clustering with Multi-Constraint QoS Service Routing in Wireless Sensor Networks
    Autorzy:
    Agarkhed, Jayashree
    Kadrolli, Vijayalaxmi
    Patil, Siddarama R.
    Powiązania:
    https://bibliotekanauki.pl/articles/307716.pdf
    Data publikacji:
    2019
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    fuzzy logic
    QoS
    routing
    WSN
    Opis:
    This paper presents a fuzzy logic-based, service differentiated, QoS aware routing protocol (FMSR) offering multipath routing for WSNs, with the purpose of providing a service differentiated path meant for communication between nodes, based on actual requirements. The proposed protocol initially forms a cluster by fuzzy c-means. Next, the building of a routing follows, so as to establish multiple paths between nodes through the modified QoS k-nearest neighborhood, based on different QoS constraints and on optimum shortest paths. If one node in the path fails due to lack of residual energy, bandwidth, packet loss, delay, an alternate path leading through another neighborhood node is selected for communication. Simulation results show that the proposed protocol performs better in terms of packet delivery ratio, delay, packet drop ratio and throughput compared to other existing routing protocols.
    Źródło:
    Journal of Telecommunications and Information Technology; 2019, 1; 31-38
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On Dimensioning and Routing in the IP QoS System
    Autorzy:
    Góralski, W.
    Pyda, P.
    Dalecki, T.
    Mongay Batalla, J.
    Śliwiński, J.
    Latoszek, W.
    Gut, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/307866.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    IP QoS System
    resource dimensioning
    routing
    Opis:
    This article presents dimensioning and routing solutions in IP QoS System designed during the implementation of the PBZ project: "Next Generation Services and Networks - technical, application and market aspects: Traffic management - IP QoS System". The paper presents the functional architecture together to the description of the functions and methods implemented in the system.
    Źródło:
    Journal of Telecommunications and Information Technology; 2011, 3; 21-28
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selected Issues of QoS Provision in Heterogenous Military Networks
    Autorzy:
    Hauge, M.
    Landmark, L.
    Łubkowski, P.
    Amanowicz, M.
    Maślanka, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/226154.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    E2E QoS
    connectivity
    routing
    heterogenous networks
    Opis:
    Tactical ad-hoc networks are evolving today towards complex heterogeneous networks in terms of architecture, protocols and security. Due to the difference in network resources and reliability, end-to-end quality of service provisioning becomes very challenging. If we also take into account communication issues such as unpredictable connectivity, preferential forwarding for special traffic classes, intermittency due to node or communication link failure, the problem is further aggravated. In this article, we examine the major challenges that must be solved in order to provide efficient QoS provisioning in the heterogeneous network. Finally we describe QoS-aware mechanisms for inter-domain and intra-domain heterogeneous networks, also including real-time services provision in highly mobilr environments.
    Źródło:
    International Journal of Electronics and Telecommunications; 2014, 60, 1; 7-13
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On-demand Bandwidth and Stability Based Unicast Routing in Mobile Adhoc Networks
    Autorzy:
    Basarkod, P. I.
    Manvi, S. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/963935.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Mobile Ad hoc Network
    QoS
    stability
    routing
    mobility
    Opis:
    Characteristics of mobile ad hoc networks (MANETs) such as lack of central coordination, dynamic topology and limited resources pose a challenging problem in quality of service (QoS) routing. Providing an efficient, robust and low overhead QoS unicast route from source to destination is a critical issue. Bandwidth and route stability are the major important QoS parameters for applications where long duration connections are required with stringent bandwidth requirements for multimedia applications. This paper proposes an On-demand Bandwidth and Stability based Unicast Routing scheme (OBSUR) in MANET by adding additional QoS features to existing Dynamic Source Routing (DSR) protocol. The objective of the OBSUR is to provide QoS satisfied, reliable and robust route for communicating nodes. The scheme works in following steps. (1) Each node in the network periodically (small regular intervals) estimates bandwidth availability, node and link stability, buffer availability, and stability factor between nodes. (2) Construction of neighbor stability and QoS database at every node which is used in route establishment process. (3) The unicast path is constructed by using route request and route reply packets with the help of route information cache, and (4) route maintenance in case of node mobility and route failures. Simulation results show that there is an improvement in terms of traffic admission ratio, control overhead, packet delivery ratio, end to end delay and throughput as compared to Route Stability Based QoS Routing (RSQR) in MANETs.
    Źródło:
    International Journal of Electronics and Telecommunications; 2014, 60, 1; 27-39
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Innovative Method of the Evaluation of Multicriterial Multicast Routing Algorithms
    Autorzy:
    Stachowiak, K.
    Zwierzykowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/307838.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    evaluation
    graph algorithms
    multicast
    QoS
    resource drainage
    routing
    Opis:
    Theoretical considerations of the multicast Quality of Service (QoS) routing have been a rapidly developing and dynamic research area for years. Several algorithms derived from different approaches have been proposed, while the pool of valid solutions to the problem is steadily growing. When new solutions are compared with their predecessors, as much information as possible about their characteristics and differences is needed. Both the graph theory and the optimization theory provide robust and objective means of comparing not only algorithms, but also the results they produce. However, any possible extension to the comparison methods is vital and can bring interesting new information that would eventually lead to innovative conclusions. This article presents a method, derived from practice and experience, that simulates the drainage of resources accumulated by consecutive communication allocations. The nature of this comparison is an extension to the classical measurement of the success ratio and this creates a context of the continuous measure of a success rather than a simple binary value. In this article such a method with regard to algorithms optimizing multicast problems for more than two criteria is used for the first time and leads to an interesting conclusion about the influence of the number of the criteria on the result.
    Źródło:
    Journal of Telecommunications and Information Technology; 2013, 1; 49-55
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transmisja pakietowa w sieci optycznej
    Packet transmission in optical networks
    Autorzy:
    Wrażeń, M.
    Bajda, A.
    Popis, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/209542.pdf
    Data publikacji:
    2008
    Wydawca:
    Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
    Tematy:
    sieć optyczna
    routing optyczny
    QoS
    systemy telekomunikacyjne
    optical network
    optical routing
    telecommunication systems
    Opis:
    Rozwój usług technik transmisyjnych wyznacza kierunek rozwoju systemu telekomunikacyjnego. Efektywność systemu telekomunikacyjnego w dużej mierze zależy od charakterystyk sieci szkieletowej. Aplikacja standardu Ethernet i protokołu GMPLS w optycznej sieci szkieletowej pozwala na ujednolicenie protokołów w sieciach LAN i WAN i zwiększenie efektywności systemu telekomunikacyjnego w zakresie prędkości transmisji, zmniejszenia ilości transkoderów protokołów, niższych kosztów infrastruktury, obsługi, zarządzania i diagnostyki. Zyskają też na znaczeniu usługi związane z bezpieczeństwem sieci teleinformatycznej i danych.
    Development of services and transmission methods points a way of telecommunication system evolution. Telecommunication systems' efficiency is dependent mainly on core network characteristics. Application of Ethernet standard and GMPLS protocol in core optical network allows to unify LAN and WAN protocols and to increase telecommunication system efficiency in the range of throughput. It is also possible to decrease the number of protocols' transcoders, reduce costs of infrastructure, maintenance, management and diagnostics. Furthermore, more consideration is taken on services connected with data and network security.
    Źródło:
    Biuletyn Wojskowej Akademii Technicznej; 2008, 57, 4; 327-342
    1234-5865
    Pojawia się w:
    Biuletyn Wojskowej Akademii Technicznej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On-demand QoS and Stability Based Multicast Routing in Mobile Ad Hoc Networks
    Autorzy:
    Basarkod, P. I.
    Manvi, S. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/308940.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    mobile ad hoc network
    mobility
    multicast routing
    QoS
    stability
    Opis:
    Finding a connection path that remains stable for suciently longer period is critical in mobile ad hoc networks due to frequent link breaks. In this paper, an on-demand Quality of Service (QoS) and stability based multicast routing (OQSMR) scheme is proposed, which is an extension of ad hoc on-demand multicast routing protocol (ODMRP) to provide QoS support for real time applications. The scheme works as follows. Each node in the network periodically estimates the parameters, i.e., node and link stability factor, bandwidth availability, and delays. Next step is creation of neighbor stability and QoS database at every node by using estimated parameters. The last sequence is multicast path construction by using, route request and route reply packets, and QoS and stability information, i.e., link/node stability factor, bandwidth and delays in route information cache of nodes, and performing route maintenance in case of node mobility and route failures. The simulation results indicate that proposed OQSMR demonstrates reduction in packet overhead, improvement in Packet Delivery Ratio (PDR), and reduction in end-to-end delays as compared to ODMRP, and Enhanced ODMRP (E-ODMRP).
    Źródło:
    Journal of Telecommunications and Information Technology; 2014, 3; 98-112
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Survey of QoS Routing Protocols for Ad Hoc Networks
    Autorzy:
    Tafa, Igli
    Powiązania:
    https://bibliotekanauki.pl/articles/1035767.pdf
    Data publikacji:
    2011
    Wydawca:
    Academicus. International Scientific Journal publishing house
    Tematy:
    QoS
    MAODV
    Multicast routing
    AD HOC NETWORKS
    MAODV-Extension
    Opis:
    The aim of this paper is to give a big survey in enhancing the balance of the routing load and the consumption of resources using network layer metrics for the path discovery in the MAODV protocol. A ad hoc network (AD HOC NETWORKS) consists of a collection of wireless mobile nodes, which form a temporary network without relying on any existing infrastructure or centralized administration. The bandwidth of the ad hoc networks architecture is limited and shared between the participating nodes in the network, therefore an efficient utilization of the network bandwidth is very important. Multicasting technology can minimize the consumption of the link bandwidth and reduce the communication cost too. As multimedia and group-oriented computing gains more popularity for users of ad hoc networks, the effective Quality of Service (QoS) of the multicasting protocol plays a significant role in ad hoc networks. In this paper we propose a reconstruction of the MAODV protocol by extending some featuring QoS in MAODV. All simulations are prepared with the NS2 simulator and compare the performance of this algorithm with the MAODV algorithm. The achieved results illustrate faster path discovery and more performing routing balance in the use of MAODV-Extension.This paper would give relatively a modest support in Mobile Technology according to QoS communication.
    Źródło:
    Academicus International Scientific Journal; 2011, 03; 108-120
    2079-3715
    2309-1088
    Pojawia się w:
    Academicus International Scientific Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Traffic type influence on performance of OSPF QoS routing
    Autorzy:
    Czarkowski, M.
    Kaczmarek, S.
    Wolff, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/307682.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    DiffServ
    exponential traffic
    network performance
    OSPF routing
    packet networks
    QoS
    self-similar traffic
    Opis:
    Feasibility studies with QoS routing proved that the network traffic type has influence on routing performance. In this work influence of self-similar traffic for network with DiffServ architecture and OSPF QoS routing has been verified. Analysis has been done for three traffic classes. Multiplexed On-Off model was used for self-similar traffic generation. Comparison of simulation results was presented using both relative and non-relative measures for three traffic classes. Results were commented and analyzed. The basic conclusion is that performance for streaming and best-effort class for self-similar traffic is higher than performance for the same class with exponential traffic (Poisson). The other important conclusion is relation between performance differences and offered traffic amount.
    Źródło:
    Journal of Telecommunications and Information Technology; 2013, 3; 19-28
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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