Multimedia Transmission over Emerging Wireless TechnologiesView this Special Issue
Research Article | Open Access
Peter Počta, Peter Kortiš, Martin Vaculík, "Impact of Background Traffic on Speech Quality in VoWLAN", Advances in Multimedia, vol. 2007, Article ID 057423, 9 pages, 2007. https://doi.org/10.1155/2007/57423
Impact of Background Traffic on Speech Quality in VoWLAN
This paper describes measurements of the impact of background traffic on speech quality in an environment of WLANs (IEEE 802.11). The simulated background traffic consists of three types of current traffics in telecommunication networks such as data transfer service, multimedia streaming service, and Web service. The background traffic was generated by means of the accomplished Distributed Internet Traffic Generator (D-ITG). The impact of these types of traffic and traffic load on speech quality using the test sequence and speech sequences is the aim of this paper. The assessment of speech quality is carried out by means of the accomplished Perceptual Evaluation of Speech Quality (PESQ) algorithm. The proposal of a new method for improved detection of the critical conditions in wireless telecommunication networks from the speech quality point of view is presented in this paper. Conclusion implies the next application of the method of improved detection of critical conditions for the purpose of algorithms for link adaptation from the speech quality point of view in an environment of WLANs. The primary goal of these algorithms is improving speech quality in the VoWLAN connections, which are established in the competent link.
- ITU-T Rec. P.800, “Methods for subjective determination of transmission quality,” International Telecommunications Union, Geneva, Switzerland, 1996.
- ITU-T Rec. P.862, “Perceptual evaluation of speech quality,” International Telecommunications Union, Geneva, Switzerland, 2001.
- Official IEEE 802.11 working group project timelines, http://grouper.ieee.org/groups/802/11/Reports/802.11_Timelines.htm.
- “Voice over wireless LAN: 802.11x hears the call for wireless VoIP,” Market research rep., in-stat, April 2002.
- L. A. R. Yamamoto and J. G. Beerends, “Impact of network performance parameters on the end-to-end perceived speech quality,” in Proceedings of Expert ATM Traffic Symposium, Mykonos, Greece, September 1997.
- B. Duysburgh, S. Vanhastel, B. De Vreese, C. Petrisor, and P. Demeester, “On the influence of best-effort network conditions on the perceivedspeech quality of VoIP connections,” in Proceedings of the 10th International Conference on Computer Communications and Networks (ICCCN '01), pp. 334–339, Scottsdale, Ariz, USA, October 2001.
- L. Ding and R. A. Goubran, “Assessment of effects of packet loss on speech quality in VoIP,” in Proceedings of the 2nd IEEE Internatioal Workshop on Haptic, Audio and Visual Environments and Their Applications (HAVE '03), pp. 49–54, Ottawa, Ontario, Canada, September 2003.
- J. Zhang, D. Yang, and Z. Quan, “Voice quality of VoIP in mobile communication systems,” in Proceedings of the IEEE Radio and Wireless Symposium (RWS '06), pp. 131–134, San Diego, Calif, USA, January 2006.
- M. Narbutt and M. Davis, “Effect of free bandwidth on VoIP performance in 802.1lb WLAN networks,” in Proceedings of the Irish Signals and Systems Conference (ISSC '06), pp. 123–128, Dublin, Ireland, June 2006.
- S. Choi, J. del Prado, N. S. Shankar, and S. Mangold, “IEEE 802.11 e contention-based channel access (EDCF) performance evaluation,” in Proceedings of the IEEE International Conference on Communications (ICC '03), vol. 2, pp. 1151–1156, Anchorage, Alaska, USA, May 2003.
- I. Dangerfield, D. Malone, and D. J. Leith, “Experimental evaluation of 802.11e EDCA for enhanced voice over WLAN performance,” in Proceedings of the 4th International Symposium on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks, pp. 1–7, Boston, Mass, USA, April 2006.
- G. S. Paschos, I. Papapanagiotou, S. A. Kotsopoulos, and G. K. Karagiannidis, “A new MAC protocol with pseudo-TDMA behavior for supporting quality of service in 802.11 wireless LANs,” EURASIP Journal on Wireless Communications and Networking, vol. 2006, Article ID 65836, 9 pages, 2006.
- Distributed Internet Traffic Generator, http://www.grid.unina.it/software/ITG/.
- P. Wang, H. Jiang, and W. Zhuang, “IEEE 802.11E enhancement for voice service,” IEEE Wireless Communications, vol. 13, no. 1, pp. 30–35, 2006.
- Q. Ni, L. Romdhani, and T. Turletti, “A survey of QoS enhancements for IEEE 802.11 wireless LAN,” Wireless Communications and Mobile Computing, vol. 4, no. 5, pp. 547–566, 2004.
- IEEE 802.11e-2005, “IEEE standard for information technology—telecommunications and information exchange between systems—local and metropolitan area networks—specific requirements—part 11: wireless medium access control (MAC) and physical layer (PHY) specifications: amendment 8: medium access control (MAC) quality of service (QoS) enhancements,” November 2005.
- Z.-N. Kong, D. H. K. Tsang, B. Bensaou, and D. Gao, “Performance analysis of IEEE 802.11e contention-based channel access,” IEEE Journal on Selected Areas in Communications, vol. 22, no. 10, pp. 2095–2106, 2004.
- ITU-T Rec. G.729, “Coding of speech at 8 kbit/s using conjugate-structure algebraic-code-exited linear prediction (CS-ACELP),” International Telecommunications Union, Geneva, Switzerland, 1996.
- ITU-T Rec. P.862.3, “Application guide for objective quality measurement based on recommendations P.862, P.862.1 and P.862.2,” International Telecommunications Union, Geneva, Switzerland, 2005.
- ITU-T Rec. P.501, “Test signals for use in telephonometry,” International Telecommunications Union, Geneva, Switzerland, 2000.
- P. Počta and M. Vaculík, “Method of choice of test signals for automatic intrusive measurement VTQoS,” in Proceedings of the 4th International Conference on Measurement of Speech and Audio Quality in Networks (MESAQIN '05), Prague, Czech Republic, June 2005.
- P. Počta and M. Vaculík, “Determination of optimal test sequence for automatic intrusive measurement VTQoS on environment of fixed telecommunication network,” in Proceedings of the 6th International Conference RTT, Ostrava, Czech Republic, 2005.
- P. Počta and M. Vaculík, “Researching of coders influence on basic measurement signals used in optimal test sequence,” Advances in Electrical and Electronic Engineering, vol. 5, no. 3, pp. 377–380, 2006.
- P. Počta and M. Vaculík, “Comparison of test sequence for intrusive measurement of VTQoS with speech sequences in the environment of IP networks,” in Proceedings of the 5th International Conference on Measurement of Speech and Audio Quality in Networks (MESAQIN '06), Prague, Czech Republic, June 2006.
- ITU-T Rec. P.830, “Subjective performance assessment of digital telephone-band and wideband digital codecs,” International Telecommunications Union, Geneva, Switzerland, 1996.
- Wireshark network analyzer, http://www.wireshark.org/.
- 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 network and codecs,” in Proceedings of IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP '01), vol. 2, pp. 749–752, Salt Lake City, Utah, USA, May 2001.
- J. Holub, R. Šmíd, and M. Bachtík, “Child listeners as the test subject—comparison with adults and P.862,” in Proceedings of the 2nd International Conference on Measurement of Speech and Audio Quality in Networks (MESAQIN '03), Prague, Czech Republic, May 2003.
Copyright © 2007 Peter Počta et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.