Voice quality measurements on a GSM network through free software

Authors

Keywords:

GSM, USRP, GoS, Dropped Rate, MOS

Abstract

This article presents the results obtained by measuring the quality parameters of a telecommunications network on GSM (Global System Mobile) in the DCS-1800 (Digital Cellular Service - 1800MHz) band; which is used in order to articulate a system of disaster relief in emergency situations, using a USRP (Universal Software Radio Peripheral) in conjunction with IP telephony system based on Asterisk. The USRP is responsible for emulating the operation of a BTS (Base Transceiver Station) performing the functions of a PBX (Private Branch Exchange).

The measurements of network performance were made from three probabilistic parameters: GoS (Grade of Service), DCR (Dropped Call Rate) and MOS (Mean Opinion Score). Traffic was generated using an 8 terminals and choosing a GoS of 2% to 3.6 Erlang, this measurement was performed using probabilistic models of Erlang B. The network coverage was obtained using the Okumura-Hata model for both indoors and outdoors, without the use of amplifiers. The consumption of power in the system was also measured.

Author Biographies

  • Elvis E. Gaona G., Universidad Distrital Francisco José de Caldas

    Nació en Arauca, Arauca, el 30 de Enero de 1979. Se graduó de Ingeniero Electrónico en la Universidad Distrital Francisco José de Caldas, 2001. Como especialista en Telecomunicaciones Móviles, 2003. Como Magíster en Ciencias de la Información y las comunicaciones, 2007 en la misma institución. Ejerce actualmente como docente asociado de planta en la Facultad de Ingeniería en la Universidad Distrital, es director del grupo de investigación GITUD.

  • Santiago Cárdenas V., Universidad Distrital Francisco José de Caldas

    Nació en Bogotá D.C. Se graduó de Ingeniero Electrónico en la Universidad Distrital Francisco José de Caldas, 2012. Hizo parte del grupo de investigación GITUD. Actualmente trabaja en Fox Telecolombia.

  • Elkin G. Muskus R., Universidad Distrital Francisco José de Caldas

    Nació en Barrancabermeja, Santander, el 9 de Febrero de 1979. Se graduó de Ingeniero Electrónico en la Universidad Distrital Francisco José de Caldas, 2001. Como especialista en Telecomunicaciones Móviles de la misma institución, 2003. Como Magíster en Mecatrónica en la Universidad Militar Nueva Granada, 2013. Ejerce actualmente como docente de medio tiempo en la Facultad de Ingeniería en la Universidad Distrital, es miembro del grupo de investigación GITUD

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Published

2013-12-13

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Artículos

How to Cite

Voice quality measurements on a GSM network through free software. (2013). Entre Ciencia E ingeniería, 7(14), 58-65. https://ojs.ucp.edu.co/index.php/entrecienciaeingenieria/article/view/610