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Wyświetlanie 1-5 z 5
Tytuł:
Approximation models for the evaluation of TCP/AQM networks
Autorzy:
Marek, Dariusz
Domański, Adam
Domańska, Joanna
Szyguła, Jakub
Czachórski, Tadeusz
Klamka, Jerzy
Filus, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/2173690.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
diffusion approximation
active queue management
AQM
congestion control
dropping packets
fluid flow approximation
FFA
non-integer order PIγ controller
G/G/1/N queueing model
przybliżenie dyfuzji
aktywne zarządzanie kolejką
kontrola zatorów
upuszczanie pakietów
przybliżenie przepływu płynu
model kolejkowania G/G/1/N
Opis:
The article proposes a model in which Diffusion Approximation is used to analyse the TCP/AQM transmission mechanism in a multinode computer network. In order to prevent traffic congestion, routers implement AQM (Active Queue Management) algorithms. We investigate the influence of using RED-based AQM mechanisms and the fractional controller PIγ on the transport layer. Additionally, we examine the cases in which the TCP and the UDP flows occur and analyse their mutual influence. Both transport protocols used are independent and work simultaneously. We compare our solution with the Fluid Flow approximation, demonstrating the advantages of Diffusion Approximation.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 4; art. no. e141986
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The IoT gateway with active queue management
Autorzy:
Domański, Adam
Domańska, Joanna
Czachórski, Tadeusz
Klamka, Jerzy
Szyguła, Jakub
Marek, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/1838178.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
active queue management
PI controller
dropping packets
fractional calculus
IoT gateway
aktywne zarządzanie kolejkami
regulator PI
pochodna ułamkowa
Internet Rzeczy
Opis:
As the traffic volume from various Internet of things (IoT) networks increases significantly, the need for adapting the quality of service (QoS) mechanisms to the new Internet conditions becomes essential. We propose a QoS mechanism for the IoT gateway based on packet classification and active queue management (AQM). End devices label packets with a special packet field (type of service (ToS) for IPv4 or traffic class (TC) for IPv6) and thus classify them as priority for real-time IoT traffic and non-priority for standard IP traffic. Our AQM mechanism drops only non-priority packets and thus ensures that real-time traffic packets for critical IoT systems are not removed if the priority traffic does not exceed the maximum queue capacity. This AQM mechanism is based on the PIα controller with non-integer integration order. We use fluid flow approximation and discrete event simulation to determine the influence of the AQM policy on the packet loss probability, queue length and its variability. The impact of the long-range dependent (LRD) traffic is also considered. The obtained results show the properties of the proposed mechanism and the merits of the PIα controller.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2021, 31, 1; 165-178
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of a non-integer order PI controller with an active queue management mechanism
Autorzy:
Domański, A.
Domańska, J.
Czachórski, T.
Klamka, J.
Powiązania:
https://bibliotekanauki.pl/articles/331094.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
active queue management
PI controller
dropping packets
fractional calculus
aktywne zarządzanie kolejkami
regulator PI
pochodna ułamkowa
Opis:
In this paper the performance of a fractional order PI controller is compared with that of RED, a well-known active queue management (AQM) mechanism. The article uses fluid flow approximation and discrete-event simulation to investigate the influence of the AQM policy on the packet loss probability, the queue length and its variability. The impact of self-similar traffic is also considered.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2016, 26, 4; 777-789
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A RED modified weighted moving average for soft real-time application
Autorzy:
Domańska, J.
Domański, A.
Augustyn, D. R.
Klamka, J.
Powiązania:
https://bibliotekanauki.pl/articles/330599.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
active queue management
soft real time
dropping packets
aktywne zarządzanie kolejkami
czas rzeczywisty miękki
Opis:
The popularity of TCP/IP has resulted in an increase in usage of best-effort networks for real-time communication. Much effort has been spent to ensure quality of service for soft real-time traffic over IP networks. The Internet Engineering Task Force has proposed some architecture components, such as Active Queue Management (AQM). The paper investigates the influence of the weighted moving average on packet waiting time reduction for an AQM mechanism: the RED algorithm. The proposed method for computing the average queue length is based on a difference equation (a recursive equation). Depending on a particular optimality criterion, proper parameters of the modified weighted moving average function can be chosen. This change will allow reducing the number of violations of timing constraints and better use of this mechanism for soft real-time transmissions. The optimization problem is solved through simulations performed in OMNeT++ and later verified experimentally on a Linux implementation.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2014, 24, 3; 697-707
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The choice of optimal 3-rd order polynomial packet dropping function for NLRED in the presence of self-similar traffic
Autorzy:
Domańska, J.
Augustyn, D.
Domański, A.
Powiązania:
https://bibliotekanauki.pl/articles/201691.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
self-similarity
active queue management
non-linear RED
dropping packets
Opis:
Algorithms of queue management in IP routers determine which packet should be deleted when necessary. The article investigates the influence of the self-similarity on the optimal packet rejection probability function in a special case of NLRED queues. This paper describes another approach to the non-linear packet dropping function. We propose to use the solutions based on the polynomials with degree equals to 3. The process of obtaining the optimal dropping packets function has been presented. Our researches were carried out using the Discrete Event Simulator OMNET++. The AQM model was early verified using the discrete-time Markov chain. The obtained results show that the traffic characteristic has the great impact on the network node behavior, but self-similarity of network traffic has no influence on the choosing of the optimal dropping packet function.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 4; 779-786
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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