Performance evaluation of VoIP technology in an extended service set, in concordance with IEEE 802.11g

  • Marcelo David Núñez Cuadrado Universidad de las Fuerzas Armadas - ESPE Sangolquí
  • Carlos Andres Jativa Huilcapi Universidad de las Fuerzas Armadas - ESPE Sangolquí
  • Román Alcides Lara Cueva Universidad de las Fuerzas Armadas - ESPE Sangolquí
Keywords: Alix, ESS, IEEE 802.11g, MOS, QoE, QoS, VoIP.


In this paper, we evaluate the performance in function of the metrics associated to Quality of Service [QoS] and Quality of user Experience [QoE] in an experimental way in the VoIP service for G.711 and G.729 códecs. This was performed over an extended service set based on Wi-Fi technology in concordance with IEEE 802.11g standard using embedded systems. QoS related metrics are obtained by using the intrusive traffic injection technique. In addition, we assessed the QoE using the MOSc [Mean Opinion Score conversational] analysis. The best results were obtained for G.729, reaching up to 25 simultaneous injections with optimal delay, jitter and packet loss values according to the ITU-T recommendation for VoIP. However, the G.711 codec presented a better throughput. On the other hand, QoE evaluation indicates a slight superiority of G.729 in the MOSc appreciation. Finally, we conclude that packet loss and delay are the most influential metrics in VoIP service degradation.

Author Biographies

Marcelo David Núñez Cuadrado, Universidad de las Fuerzas Armadas - ESPE Sangolquí

Candidate to Engineer in Electronics and Telecommunications at the Universidad de las Fuerzas Armadas - ESPE (Sangolquí, Ecuador). En 2016 he joined the Intelligent Systems research group (WICOM) as research assistant. His main areas of interest in research are wireless systems and Voice over IP (VoIP).


Carlos Andres Jativa Huilcapi, Universidad de las Fuerzas Armadas - ESPE Sangolquí

Candidate to Engineer in Electronics and Telecommunications at the Universidad de las Fuerzas Armadas - ESPE (Sangolquí, Ecuador). En 2016 he joined the Intelligent Systems research group (WICOM) as research assistant. He completed the CCNA courses and he is candidate to CISCO certification. His main areas of interests in research are wireless communications and data networks.

Román Alcides Lara Cueva, Universidad de las Fuerzas Armadas - ESPE Sangolquí

Engineer in Electronics and Telecommunications from the Escuela Nacional Politécnica (Quito-Ecuador, 2001); Master in Wireless Systems and Related Technologies from the Politecnico di Torino (Italy, 2005); Master and PhD., in Telecommunication Networks for Developing Countries from the Universidad Rey Juan Carlos (Madrid-España, 2010/2015). He joined the Department of Electrical Engineering of the Universidad de las Fuerzas Armadas - ESPE (Sangolquí, Ecuador) in 2002, where he is full professor since 2005. He has participated in more than ten research projects developed with public funds (five of them as main researcher). His main areas of research interests are: digital signal processing, smart cities, wireless systems and automatic learning theory.


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