INVESTIGATION OF THE IMPACT OF NETWORK LOAD ON VoIP TRANSMISSION QUALITY
DOI:
https://doi.org/10.24025/2306-4412.4.2019.181351Keywords:
network load, quality of service, VoIP technology, codec, jitter, MOS factor.Abstract
The emergence of new technologies and protocols for data transmission in telecommunications networks leads to the emergence of new approaches to qualitative and efficient information transmission. The transmission of voice messages is one of the most common types of data being transmitted. In classical analogue systems, speech was transmitted by channel switching. But with the emergence of a packet switching approach, a new ideology for voice messaging has emerged. IP telephony, with which you can deploy telephone corporate networks, is among the most effective ones, in terms of utilizing the available bandwidth and adaptive quality settings. Today, there is a large number of protocols for building IP networks, or its segments, but it is not a simple task to choose the "right" protocol under specific network conditions. The purpose of the article is to investigate the effect of telecommunication network congestion on VoIP transmission quality, to choose the optimal protocol for specific transmission conditions, such as preset quality parameters (QoS) and transmission speed. The article discusses the problem of determining the admissible level of telecommunication network congestion for the optimal operation of VoIP communication. A model of a telecommunication network, in which there is a load of voice and videoconferencing, a comparison of characteristics of voice traffic for voice codecs, comparative analysis of characteristics at different load, is proposed. The optimum network connection type and usage criterion are determined. The article deals with the simulation of telecommunication network segment in order to model and analyze the characteristics of the most common codecs used in IP networks. MOS voice quality metrics have been also introduced for all network congestion scenarios considered. Based on the research, recommendations regarding the use of different codecs for different network congestion to provide the set parameters of MOS factor have been made.
References
Alias Mohd, and Ong Lee Loon, "Performance of Voice over IP (VoIP) over a Wireless LAN (WLAN) for different Audio/Voice codecs", Jurnal Teknologi, vol. 47 (D) Dis., pp. 39-60, 2007.
Abdul-Bary Raouf Suleiman, and Abdulhameed Hameed, "Simulation of SIP-based VoIP for Mosul University Communication Network", International Journal of Computing and Digital Systems, vol. 2, no. 2, pp. 89-94, 2013.
Bassam M. AL-Mahadeen, and Ameen Al-Mseden, "Improving the QoS of VoIP over WiMAX networks using OPNET Modeler", IJCSNS International Journal of Computer Science and Network Security, vol. 17, no. 8, pp. 132-142, August 2017.
OPNET Modeler: MIL3, 1996. [Online]. Available: https://www.riverbed.com/gb/ products/steelcentral/opnet.html
Recommendation ITU-T Y.1541, Network performance objectives for IP-based services. [Online]. Available: https://www.itu.int/rec/ T-REC-Y.1541/en
Recommendation ITU-T P.800.1, Mean opinion score (MOS) terminology. [Online]. Available: https://www.itu.int/rec/T-REC-P.800.1/en
Recommendation ITU-Т G.114, One-way transmission time. [Online]. Available: https://www.itu.int/ rec/T-REC-G.114/en
A. Asaduzzaman, and I. Mahgoub, ns2 – Network Simulator Version 2, Department of Computer Science and Engineering, Florida Atalantic University Mobile Computing, pp. 2-3, 2003.
The IEEE 802 LMSC Executive Committee, [Online]. Available: http://www.ieee802.org/3/OMEGA
QoS and QoE management in UMTS cellu-lar systems, Edited by David Soldani, Man Li and Renaud Cuny, John Wiley & Sons, Ltd. pp, 1-7, 2006.
Downloads
Published
How to Cite
Issue
Section
URN
License
Copyright (c) 2020 Андрій Михайлович Чорній, Дмитро Анатолійович Журбинський, Ігор Олександрович Євтушенко The authors who publish in this journal agree to the following terms:The authors reserve the right to authorship of their work and give the journal the right to first publish this work under the terms of the Creative Commons Attribution License CC BY-NC, which allows other persons to freely distribute published work with a mandatory reference to authors of the original work and the first publication of the work in this journal.
Authors have the right to conclude separate additional agreements for the non-exclusive distribution of the paper in the form in which it was published by this journal (for example, posting work in electronic repository or publishing as part of a monograph), provided that the link to the first publication in this journal is maintained.
The journal policy allows and encourages authors to post on the Internet (for example, in repositories of institutions or on personal websites) the manuscript of work, both before the submission of this manuscript to the editorial staff, and during its editorial work, as it contributes to the emergence of productive scientific discussion and positively affects the efficiency and dynamics of published work citation (see The Effect of Open Access).
