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Wyświetlanie 1-3 z 3
Tytuł:
Impact of Signaling System Performance on QoE in Next Generation Networks
Autorzy:
Batalla, J. M.
Śliwiński, J.
Tarasiuk, H.
Burakowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/308179.pdf
Data publikacji:
2009
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
call setup delay
class of service
heterogeneous networks
next generation networks
quality of experience
quality of service
signaling system
Opis:
The first experience of quality by multimedia applications' users takes place during the setup phase of a new connection. If the setup phase is not accepted or "slowly accepted", the confidence of the user decreases. The user becomes more sensitive when he/she pays the connections with assured quality of service (QoS). In this case, the process of call request should be also accomplished with QoS guarantees. This paper presents the signaling sub-system implemented within the EuQoS system. The EuQoS signaling process follows main assumptions of next generation networks (NGN) architecture and performs tasks related with codec agreement between multimedia end users, admission control and resource reservation functions. In this paper, we present analytical, simulation and experimental results showing the impact of signaling system performance on quality of experience (QoE) for the potential users of multi-layer EuQoS system. In particular, the presented approach aims at ensuring user QoE of the connection setup phase by ensuring QoS for transferring signaling messages by the network.
Źródło:
Journal of Telecommunications and Information Technology; 2009, 4; 124-137
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance and Limitations of VDSL2-based Next Generation Access Networks
Autorzy:
Heliotis, G.
Dimos, L.-P.
Kordoulis, I.
Agapiou, G.
Powiązania:
https://bibliotekanauki.pl/articles/307882.pdf
Data publikacji:
2013
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
DSL networks
impulse noise
VDSL2 next generation access networks
crosstalk
Opis:
In this paper, we first briefly review the main operational aspects of FTTC (xPON)/VDSL2 access networks. Then, we present performance measurements with respect to network sub loop operating length and VDSL2 operational profiles (8b, 12a, 17a), studying the rates that can be achieved at different scenarios. We then provide results of the effect of stationary crosstalk and non-stationary impulse noise on the provisioned service in an operating VDSL2 access network.
Źródło:
Journal of Telecommunications and Information Technology; 2013, 1; 98-102
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliable and High QoS Wireless Communications over Harsh Environments
Autorzy:
Bilbao, J.
Calvo, A.
Armendariz, I.
Crespo, P.
Powiązania:
https://bibliotekanauki.pl/articles/307844.pdf
Data publikacji:
2013
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
cooperative wireless networks
multicasting management techniques
next generation networks
opportunistic wireless
quality and performance evaluation
QoS
reliability and performance modelling
reliability of networks
wireless and mobile networks
Opis:
One of the most challenging research fields in which research community has taken a very active role is focused on trying to bring the features of wireless networks into line with the traditional wired solutions. Given the noisy and lossy nature of the wireless medium, it is more difficult to provide a comparable Quality of Service (QoS) and Reliability over wireless networks. This lack of reliability avoids the use of wireless solution in scenarios under harsh environment and mission-critical applications. In this paper we propose an inter-node collaborative schema with the aim of improving the achievable QoS level for multicast streaming, through the use of Network Coding and the algebra it is based on. We also present an implementation of the described algorithm on the OPNET discrete event simulation tool. Experimental results highlighting the performance achieved by the proposed algorithm and its improved efficiency as compared to other solutions are described.
Źródło:
Journal of Telecommunications and Information Technology; 2013, 1; 32-40
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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