[1] S. K. Puspita FM and S. Z. Taib BM, “Improved models of internet charging scheme of single bottleneck link in multi qos networks,” 2013. [Online]. Available: http://ddms.usim.edu.my:80/jspui/handle/123456789/15429
[2] A. R. Modarressi and S. Mohan, “Control and management in next-generation networks: challenges and opportunities,” IEEE Communications Magazine, vol. 38, no. 10, pp. 94–102, 2000. [Online]. Available: https://doi.org/10.1109/35.874976
[3] D. Strzęciwilk, K. Ptaszek, P. Hoser, and I. Antoniku, “A research on the impact of encryption algorithms on the quality of vpn tunnels’ transmission,” in ITM Web of Conferences, vol. 21. EDP Sciences, 2018, p. 00011. [Online]. Available: https://doi.org/10.1051/itmconf/ 20182100011
[4] H. J. Kim and S. G. Choi, “A study on a qos/qoe correlation model for qoe evaluation on iptv service,” in 2010 The 12th International Conference on Advanced Communication Technology (ICACT), vol. 2. IEEE, 2010, pp. 1377–1382.
[5] D. Strzęciwilk, “Examination of transmission quality in the ip multiprotocol label switching corporate networks,” International Journal of Electronics and Telecommunications, vol. 58, pp. 267–272, 2012. [Online]. Available: http://doi.org/10.2478/v10177-012-0037-z
[6] A. J. Estepa, R. Estepa, J. M. Vozmediano, and P. Carrillo, “Dynamic voip codec selection on smartphones,” Netw. Protoc. Algorithms, vol. 6, no. 2, pp. 22–37, 2014. [Online]. Available: https://doi.org/10.5296/npa.v6i2.5370
[7] W. M. Zuberek and D. Strzeciwilk, “Modeling traffic shaping and traffic policing in packet-switched networks,” Journal of Computer Sciences and Applications, vol. 6, no. 2, pp. 75–81, 2018. [Online]. Available: http://pubs.sciepub.com/jcsa/6/2/4
[8] D. Cohen, “Specifications for the network voice protocol,” UNIVERSITY OF SOUTHERN CALIFORNIA MARINA DEL REY INFORMATION SCIENCES INST, Tech. Rep., 1976. [Online]. Available: https://www.rfc-editor.org/info/rfc741
[9] J. Davidson, J. Peters, J. Peters, and B. Gracely, Voice over IP fundamentals. Cisco press, 2000. [10] S. Ganguly and S. Bhatnagar, VoIP: wireless, P2P and new enterprise voice over IP. John Wiley & Sons, 2008.
[11] B. Hartpence, Packet Guide to Voice over IP: A system administrator’s guide to VoIP technologies. " O’Reilly Media, Inc.", 2013.
[12] S. Deering and R. Hinden, “Rfc2460: Internet protocol, version 6 (ipv6) specification,” 1998.
[13] K. Ramakrishnan, S. Floyd, and D. Black, “Rfc3168: The addition of explicit congestion notification (ecn) to ip,” 2001.
[14] K. Nicholas, “Definition of the differentiated services field in the ipv4 and ipv6 headers,” RFC 2474, 1998.
[15] F. Baker, J. Polk, and M. Dolly, “A differentiated services code point (dscp) for capacity-admitted traffic,” Internet Engineering Task Force (IETF), 2010.
[16] D. Strzęciwilk, R. Nafkha, and R. Zawi´slak, “Performance analysis of a qos system with wfq queuing using temporal petri nets,” in International Conference on Computer Information Systems and Industrial Management. Springer, 2021, pp. 462–476. [Online]. Available: https://doi.org/10.1007/978-3-030-84340-3_38 [17] S. Blake, D. Black, M. Carlson, E. Davies, Z. Wang, and W. Weiss, “An architecture for differentiated services,” 1998.
[18] D. C. Dowden, R. D. Gitlin, and R. L. Martin, “Next-generation networks,” Bell Labs technical journal, vol. 3, no. 4, pp. 3–14, 1998. [Online]. Available: https://doi.org/10.1002/bltj.2125
[19] G. R. Ash, Traffic engineering and QoS optimization of integrated voice and data networks. Elsevier, 2006.
[20] M. H. Miraz, S. A. Molvi, M. A. Ganie, M. Ali, and A. H. Hussein, “Simulation and analysis of quality of service (qos) parameters of voice over ip (voip) traffic through heterogeneous networks,” arXiv preprint arXiv:1708.01572, 2017. [Online]. Available: https://arxiv.org/abs/1708.01572
[21] E. T. Affonso, R. D. Nunes, R. L. Rosa, G. F. Pivaro, and D. Z. Rodriguez, “Speech quality assessment in wireless voip communication using deep belief network,” IEEE Access, vol. 6, pp. 77 022–77 032, 2018. [Online]. Available: https://doi.org/10.1109/ACCESS.2018.2871072
[22] J. Yu and I. Al-Ajarmeh, “Call admission control and traffic engineering of voip,” in 2007 Second International Conference on Digital Telecommunications (ICDT’07). IEEE, 2007, pp. 11–11.
[23] T. ITU, “Recommendation g. 114, one-way transmission time,” Series G: Transmission Systems and Media, Digital Systems and Networks, Telecommunication Standardization Sector of ITU, 2000.
[24] J. H. James, B. Chen, and L. Garrison, “Implementing voip: a voice transmission performance progress report,” IEEE Communications Magazine, vol. 42, no. 7, pp. 36–41, 2004. [Online]. Available: https://doi.org/10.1109/MCOM.2004.1316528
[25] J. G. Beerends, C. Schmidmer, J. Berger, M. Obermann, R. Ullmann, J. Pomy, and M. Keyhl, “Perceptual objective listening quality assessment (polqa), the third generation itut standard for end-to-end speech quality measurement part i—temporal alignment,” Journal of the Audio Engineering Society, vol. 61, no. 6, pp. 366–384, 2013. [Online]. Available: http://resolver.tudelft.nl/uuid:91d98cbc-d802-40d3-a1bb-a58d67668728
[26] R. D. Nunes, R. L. Rosa, and D. Z. Rodríguez, “Performance improvement of a non-intrusive voice quality metric in lossy networks,” IET Communications, vol. 13, no. 20, pp. 3401–3408, 2019. [Online]. Available: https://doi.org/10.1049/iet-com.2018.5165
[27] B. Naderi and R. Cutler, “An open source implementation of itu-t recommendation p. 808 with validation,” arXiv preprint arXiv:2005.08138, 2020. [Online]. Available: https://arxiv.org/ct?url=https%3A%2F%2Fdx. doi.org%2F10.21437%2FInterspeech.2020-2665&v=69f1738e
[28] A. W. Rix, J. G. Beerends, M. P. Hollier, and A. P. Hekstra, “Perceptual evaluation of speech quality (pesq)-a new method for speech quality assessment of telephone networks and codecs,” in 2001 IEEE international conference on acoustics, speech, and signal processing. Proceedings (Cat. No. 01CH37221), vol. 2. IEEE, 2001, pp. 749–752.
[29] S. Voran, “Objective estimation of perceived speech quality. i. development of the measuring normalizing block technique,” IEEE Transactions on speech and audio processing, vol. 7, no. 4, pp. 371–382, 1999. [Online]. Available: https://doi.org/10.1109/89.771259
[30] M. Coto-Jimenez, J. Goddard-Close, L. Di Persia, and H. L. Rufiner, “Hybrid speech enhancement with wiener filters and deep lstm denoising autoencoders,” in 2018 IEEE International Work Conference on Bioinspired Intelligence (IWOBI). IEEE, 2018, pp. 1–8. [Online]. Available: https://doi.org/10.1109/IWOBI.2018.8464132
[31] L. Ding and R. A. Goubran, “Speech quality prediction in voip using the extended e-model,” in GLOBECOM’03. IEEE Global Telecommunications Conference (IEEE Cat. No. 03CH37489), vol. 7. IEEE, 2003, pp. 3974–3978. [Online]. Available: https://doi.org/10.1109/GLOCOM.2003.1258975
[32] J. A. Bergstra and C. Middelburg, “Itu-t recommendation g. 107: The e-model, a computational model for use in transmission planning,” 2003.
[33] R. Jain, “Quality of experience,” IEEE multimedia, vol. 11, no. 1, pp. 96–95, 2004. [Online]. Available: https://doi.org/10.1109/MMUL.2004.10000
[34] A. Eskandar, M. Syed et al., “Performance analysis of voip over gre tunnel.” International Journal of Computer Network & Information Security, vol. 7, no. 12, 2015. [Online]. Available: http://doi.org/10.5815/ijcnis.2015.12.01
[35] R. S. Ramakrishnan and P. V. Kumar, “Performance analysis of different codecs in voip using sip,” in The Conference on Mobile and Pervasive Computing, 2008, pp. 142–145.
[36] S. Ragot, B. Kovesi, R. Trilling, D. Virette, N. Duc, D. Massaloux, S. Proust, B. Geiser, M. Gartner, S. Schandl et al., “Itu-t g. 729.1: An 8-32 kbit/s scalable coder interoperable with g. 729 for wideband telephony and voice over ip,” in 2007 IEEE International Conference on Acoustics, Speech and Signal Processing-ICASSP’07, vol. 4. IEEE, 2007, pp. IV–529. [Online]. Available: https://doi.org/10.1109/ICASSP. 2007.366966