Evaluación del desempeño de la tecnología VoIP en un set de servicio extendido, en concordancia con IEEE 802.11g
DOI:
https://doi.org/10.18046/syt.v15i42.2541Palabras clave:
Alix, ESS, IEEE 802.11g, MOS, QoE, QoS, VoIP.Resumen
En este artículo se evalúa experimentalmente el desempeño en función de las métricas asociadas a Calidad de Servicio [QoS] y Calidad de Experiencia de Usuario [QoE] en el servicio de voz sobre IP [VoIP] para los códecs G.711 y G.729, sobre un set de servicio extendido con tecnología Wi-Fi, en concordancia con el estándar IEEE 802.11g, implementado mediante sistemas embebidos. Las métricas de QoS se obtienen mediante la técnica intrusiva de inyección de tráfico, adicionalmente se evalúa la QoE por medio del análisis MOSc [Mean Opinion Score conversational). Los mejores resultados fueron obtenidos por el códec G.729, que alcanzó hasta 25 flujos concurrentes con valores óptimos de retardo, jitter y pérdida de paquetes según la recomendación de la ITU-T para VoIP. Sin embargo, G.711 presentó un mejor throughput. Por otro lado, la evaluación de QoE señala una ligera superioridad de G.729 en la valoración MOSc. Finalmente, se concluye que la pérdida de paquetes y el retardo son las métricas más influyentes en la degradación del servicio de VoIP.
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Evans, A. & Britain, K. (1989). Antennas: Selection and installation. Boston, MA: Radio Shack.
Avallone, S., Guadagno, S., Emma, D., & Ventre, G. (Sept. 2004). D-ITG distributed Internet traffic generator. In: Proceedings of the First International Conference on the Quantitative Evaluation of Systems QEST 2004 (pp. 316-317). IEEE.
Cano, M.D. & Cerdan, F. (2012). Subjective QoE analysis of VoIP applications in a wireless campus environment. Telecommunication Systems, 49(1), 5-15.
Canonical Ltd. (2016). Ubuntu 15.04. Retrieved from: http://releases.ubuntu.com/15.04/
Coleman, D. D., & Westcott, D. A. (2009). CWNA: Certified wireless network administrator official study guide. Sybex. Indianapolis, IN: Wiley
Dialogic Corporation. (2007). Overcoming barriers to high-quality voice over IP Deployments [white paper] Retrieved from: http://www.sumopartner.com/Resources/images/17480.pdf
Dini, P., Font-Bach, O., & Mangues-Bafalluy, J. (2008). Experimental analysis of VoIP calls quality support in IEEE 802.11 DCF. In Proceedings of the 6th International Symposium on Communication Systems, Networks and Digital Signal Processing (pp. 443-447). IEEE.
Farproc. (2017). Wifi analyzer [Android App]. Retrieved from: http://www.wifianalyzer.info/
Frost & Sullivan (2017, January 3). Growth opportunities in the VoIP access and SIP trunking services market [white paper]. Retrieved from: https://www.frost.com/c/10107/sublib/display-report.do?id=K0FC-01-00-00-00
Geier, J. (2010). Designing and deploying 802.11n wireless networks. Indianapolis, IN: Cisco.
Hattingh, C., & Szigeti, T. (2004). End-to-end QoS network design: Quality of service in LANs. WANs and VPNs. Indianapolis, IN: Cisco
IBM Knowledge Center. (2011). SPSS data collection 6.0.1: Call duration. Retrieved from: https://www.ibm.com/support/knowledgecenter/en/SSLVQG_6.0.1/com.spss.ddl/mrint_autodialer_callanalysis_callduration.htm
ITU-T Rec. G.114: One-way transmission time. (2003). Geneva, Switzerland: ITU.
ITU-T Rec. P.800: Methods for subjective determination of transmission quality. (1996), Geneva, Switzerland: ITU.
ITU-T Rec. P.830: Subjective performance assessment of telephone-band and wideband digital codecs. (1996). Geneva, Switzerland: ITU.
ITU-T Rec. P.910: Subjective video quality assessment methods for multimedia applications. (2008). International Geneva, Switzerland: ITU.
Keegan, B. & Davis, M. (2006). An experimental analysis of the call capacity of IEEE 802.11b wireless local area networks for VoIP telephony. In Irish Signals and Systems Conference (pp. 283-287). IET.
Kolahi S.S., Shah M.A., & Joseph J. (2012). Performance of VoIP on IPv4 and IPv6to4 tunnel using Windows Vista and Windows 7. In: F. Gaol (Ed.), Lecture Notes in Electrical Engineering, 157: Recent progress in data engineering and internet technology (pp. 477-483). Berlin-Heidelberg, Germany: Springer.
Lara, R., Fernández, C., & Morales, C. (2016). Análisis del desempeño en un enlace descendente de redes basadas en los estándares IEEE 802.11 b, IEEE 802.11n y WDS. RECI, Revista Iberoamericana de las Ciencias Computacionales e Informática, 5(10). Retrieved from: http://reci.org.mx/index.php/reci/article/view/42
Mills, D. L. (1991). Internet time synchronization: The network time protocol. IEEE Transactions on Communications, 39(10), 1482-1493.
Oliveira, C. & Siqueira, M. (2006). Simultaneous VoIP calls capacity over an 802.11 Ad Hoc Network. In: International Conference on Wireless
Networks (pp. 470–476). Berlin, Heidelberg: Germany: Springer-ICST.
PC Engines (2013). ALIX 3d3 Product File. Retrieved from: http://www.pcengines.ch/alix3d3.htm
QPCOM. (2011). QP-2424G high-performance reflector grid Wi-Fi antenna. (2011). Retrieved from: http://qpcom.com.co/Portals/116/QPAO24G24_Spec.pdf
Ramírez, R. (2013). Implantación de un sistema VoIP basado en software libre con Asterisk [Master Thesis]. Universitat Oberta de Catalunya: Barcelona, España.
Ubiquiti Networks (2013). Ubiquiti super range 2. Retrieved from: https://dl.ubnt.com/sr2_datasheet.pdf
Vesga-Ferreira J.C., Granados G., & Vesga-Barrera J.A. (2016). Evaluation of the performance of a network LAN over powerline communications for the transmission of VoIP. Iteckne, 13(1), 83-95.
Villacis, D., Acosta, F., & Lara, R. (2013). Performance analysis of VoIP services over WiFi-based systems. In: IEEE Colombian Conference on Communications and Computing (COLCOM), 2013. Retrieved from: http://ieeexplore.ieee.org/abstract/document/6564813/
Voyage Design and Consultants (2013). About Voyage Linux. Retrieved from: http://linux.voyage.hk
Winstron Neweb Corp. (2011). Winstron CM9-GP. Retrieved from: http://www.roc-noc.com/pdf/wnc/CM9_Data_Sheet.pdf
Zoiper. (2017). Softphone Zoiper 3. Retrieved from: https://www.zoiper.com/
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2017-10-19
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Investigación científica y tecnológica
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Esta publicación está licenciada bajo los términos de la licencia CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/deed.es)
