Maciej Sac - Publikacje - MOST Wiedzy

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Katalog Publikacji

Rok 2023
  • Implementation of IMS/NGN Transport Stratum Based on the SDN Concept
    Publikacja

    - SENSORS - Rok 2023

    The paper presents the development and verification of software and a testbed aiming to demonstrate the ability of two telecommunication network concepts—Next Generation Network (NGN) and Software-Defined Networking (SDN)—to cooperate. The proposed architecture includes components of the IP Multimedia Subsystem (IMS) in its service stratum and of the SDN (controller and programmable switches) in its transport stratum, providing...

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Rok 2022
Rok 2021
  • Performance Models of a Multidomain IMS/NGN Service Stratum
    Publikacja

    - Rok 2021

    This paper quantifies call processing performance (CPP) of a multidomain IMS/NGN architecture, which was proposed to deliver current and future telecommunication services with strict quality requirements, independently of the transport network technologies. A realistic simulation model is used as a reference for evaluation of the analytical results, in which vari-ous types of queuing systems are applied to model the opera-tion...

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Rok 2020
Rok 2019
Rok 2018
Rok 2017
Rok 2016
Rok 2015
Rok 2014
  • Call Processing Performance in a Multidomain IMS/NGN with Asymmetric Traffic
    Publikacja

    - Rok 2014

    In this paper we continue our research using the previously proposed analytical traffic model of a multidomain Next Generation Network (NGN), which is standardized for delivering multimedia services based on the IP Multimedia Subsystem (IMS). The aim of the model is to assess mean Call Set-up Delay (CSD) and mean Call Disengagement Delay (CDD), which are standardized call processing performance parameters. The output variables...

  • TRAFFIC MODEL OF A MULTIDOMAIN IMS/NGN

    In this paper we continue our research and present an analytical traffic model of a multidomain Next Generation Network (NGN), which is standardized for delivering multimedia services based on the IP Multimedia Subsystem (IMS). The model takes into account several service scenarios (including registration, intra- and inter-operator calls) and a large set of network parameters. Using the model mean Call Set-up Delay and mean Call...

  • Variable Fractional Delay Filter Design Using a Symmetric Window

    In this paper a numerically efficient method for designing a nearly optimal variable fractional delay (VFD) filter based on a simple and well-known window method is presented. In the proposed method a single window extracted from the optimal filter with fixed fractional delay (FD) is divided into even and odd part. Subsequently, the odd part is discarded and symmetric even part of the extracted window is used to design a family...

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Rok 2013
Rok 2012
Rok 2011
Rok 2010
Rok 2009
  • Gain deficit effect in the fractional delay filter design by the window method
    Publikacja

    - Rok 2009

    Metoda okien jest sposobem szybkiego i skutecznego projektowania filtrów ułamkowoopóźniających. Jednakże wzmocnienie tak zaprojektowanego filtru różni się od zakładanej wartości idealnej. To zjawisko, nazywane deficytem wzmocnienia, negatywnie wpływa na jakoś projektowanego filtru. Artykuł poświęcono wynikom badań oraz metodom korekcji tego problemu. Omówiono wpływ współczynnika korekcji deficytu wzmocnienia na charakterystykę...

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