Autor: Uhl, T. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: New Tool for Investigating QoS in the WWW Service
Autorzy:: Uhl, T.
Rompf, M.
Powiązania:: https://bibliotekanauki.pl/articles/307924.pdf
Data publikacji:: 2015
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: Apdex index
communication network
ITU-T G.1030
measurement tools
Power metric
QoS/QoE determination
Triple Play Services
WWW service
Opis:: The subject of this paper is the QoS measurement in the World Wide Web (WWW) service. It will begin with a brief presentation of methods currently used to measure QoS in the WWW service before going on to describe in detail the new tool QoSCalc (WWW). Following that, the potential of the new tool will be put to the test in a series of analysis scenarios. The results and insights obtained will then be presented in several diagrams, and interpreted.
Źródło:: Journal of Telecommunications and Information Technology; 2015, 1; 3-9
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:: Video Streaming over IP using the DASH Technique
Autorzy:: Hoppe, C.
Uhl, T.
Powiązania:: https://bibliotekanauki.pl/articles/308880.pdf
Data publikacji:: 2018
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: H.265
IP network technology
MPEG-DASH
QoS measurement techniques
QoS measurement environment
video streaming
VP9
Opis:: Modern Internet serves as a high-performance platform for an ever-increasing number of services. Some of them – video services in particular – are of the broadband variety. So, it is not surprising that segments of networks can rapidly become congested, which may lead to a deterioration in quality. It is hoped that the new MPEG-DASH technique will alleviate congestion. This paper contains an analysis of the new technology’s impact on the quality of service in IP networks. It also explains a new numerical tool QoSCalc(DASH) that has been used to analyze the DASH method in different scenarios. The results are presented graphically and interpreted.
Źródło:: Journal of Telecommunications and Information Technology; 2018, 2; 3-7
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:: The New Metric and the New Software Tool for Determining QoS in the Short Messages Service in Mobile Networks
Autorzy:: Rompf, M.
Uhl, T.
Powiązania:: https://bibliotekanauki.pl/articles/309483.pdf
Data publikacji:: 2017
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: communication network
ETSI TS 102-250-2
QoS measurement environment
QoS measurement techniques
queuing model
SMS service
Opis:: With traveling professions and nomadic lifestyles on the increase there is a growing need for comprehensive mobile networking within the Next Generation Network, and the security, reliability and technical independency of the Short Message Service (SMS) is becoming more and more indispensable for business processes. Since competitiveness goes hand-in-hand with this business capability, and methods to determine the quality of this service are becoming equally indispensable. This paper presents possible methods to evaluate the “Completion Rate of SMS” and “End-to-End Delivery Time” and combinations of them (new metric in this paper). A software tool, QoSCalc(SMS), has been developed in collaboration with the authors in order to verify whether service providers are abiding by the Service Level Agreements. The tool has been tested in a real measurement environment and the results are presented graphically here and interpreted.
Źródło:: Journal of Telecommunications and Information Technology; 2017, 2; 3-10
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:: New Tool for Examining QoS in the VToIP Service
Autorzy:: Uhl, T.
Nowicki, K.
Paulsen, S.
Powiązania:: https://bibliotekanauki.pl/articles/307757.pdf
Data publikacji:: 2014
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: communication network
emulation tool
ITU-T G.1070
PEVQ
QoS measurement
Triple Play services
video streaming
VToIP
Opis:: This paper is dedicated to the subject of measuring QoS in the Video Telephony over IP (VToIP) service. QoS measurement models in general and then models designed specifically for measuring QoS in the VToIP service are presented. A new numerical tool for examining the quality of VToIP video streams VToIP is described. The tool’s functionality is then put to the test in a number of analysis scenarios. The results and insights gained from the analyses are then presented in several diagrams, and interpreted. The paper concludes with a summary and an outlook on further areas of work.
Źródło:: Journal of Telecommunications and Information Technology; 2014, 1; 10-15
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:: New Metric for World Wide Web Service Quality
Autorzy:: Uhl, T.
Klink, J.
Bardowski, D.
Powiązania:: https://bibliotekanauki.pl/articles/307815.pdf
Data publikacji:: 2014
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: Apdex
G.1030
QoE
QoS
quality metrics
service quality assessment
WWW service quality
Opis:: The main topic of this paper is the quality of the WWW service evaluation. The authors present well-known measurement methods, and present the new “Power” metric for quality, advocating it as a method of assessing the quality of such service. This metric is based on the most important network parameters that affect any assessment of the WWW service, i.e. Web page opening time and download data transfer rate. The new method is easy to implement, fast in operation, and provides stable and repeatable results.
Źródło:: Journal of Telecommunications and Information Technology; 2014, 2; 50-58
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:: Quantifying the Suitability of Reference Signals for the Video Streaming Analysis for IPTV
Autorzy:: Hoppe, C.
Manzke, R.
Rompf, M.
Uhl, T.
Powiązania:: https://bibliotekanauki.pl/articles/307690.pdf
Data publikacji:: 2016
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: communication network
IPVT service
ITU-T J.247
measurement tools
PEVQ
QoS/QoE determination
reference signal
Triple Play Services
VQuad-HD
ITU-T J.341
Opis:: IP networks are indispensable nowadays and they are some of the most efficient platforms. The constantly growing number of users and new services in these networks – the largest being the Internet – require a satisfactory quality of service from any application they use. So, determining the QoS in real-time services is particularly important. This work shows how to quantify the suitability of reference signals for analyzing the quality of video streaming in IPTV. The assessment relies on two different algorithms: PEVQ and VQuad-HD. Three different reference signals – two real ones and an artificial one – are used in this study, and a numerical measurement system is used, which simulates mean network impairments. These measurements provide valuable information for determining the QoS of actual IPTV services in practice.
Źródło:: Journal of Telecommunications and Information Technology; 2016, 1; 29-36
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Concept for a Measurement Management System for Access Service to the Internet
Autorzy:: Klink, J. H.
Podolska, M. J.
Uhl, T.
Powiązania:: https://bibliotekanauki.pl/articles/308600.pdf
Data publikacji:: 2016
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: Internet
Measurement Management Systems
quality of service
Opis:: This paper describes the problems associated with the provision of quality of service over an access connection to the Internet, i.e. the Internet Access Service (IAS). The paper has something of an overview character. Following a comprehensive introduction to the subject of “Changing Network Technologies” the paper focuses on the topic “Quality of IAS” in the light of regulatory directives of the European Parliament and the latest recommendations of ITU-T and ETSI. The focus will then shift to “Measurement Points and Measurement Scenarios for Determining QoS”. This topic will be described in detail and illustrated with several graphics. The final chapter has a pronounced scientific character and contains, among other things, a suggestion for a so-called Measurement Management System (MMS) to aid the design, execution and evaluation of efficient, automatic QoS measurements in networks.
Źródło:: Journal of Telecommunications and Information Technology; 2016, 3; 60-69
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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