Liberal Malaina Fidel

Liberal Malaina, Fidel

Personal information

Liberal Malaina, Fidel

Address: Alda. de Urquijo s/n. C.P.: 48013. Bilbao
Office: 3A18
Email: fidel.liberal@ehu.es
Telephone: +34 94 601 4129
Fax: +34 94 601 4259

 

Academic degrees

University degrees

Career: Engineering in Telecommunications
Intensification: Telematics
Center: University of the Basque Country
Date of achievement: 2001

Doctorate

Program title: Tecnologías de la Información Electrónica y Control
DEA date of achievement: 2003
Thesis titlePropuesta de un modelo y una metodología para la gestión de la calidad en los servicios de telecomunicación
Date of achievement: 2005

Conference Papers

PQoS-driven VoIP Service Adaptation in UMTS Networks

Authors:
Nagore Bilbao, Jose Oscar Fajardo, Fidel Liberal
Year:
2009
Journal:
2nd International Workshop on the Evaluation of Quality of Service through Simulation in the Future Internet (QoSIM 2009). Rome, Italy. March 6-8
Description:

<span lang="en">This paper shows the relevance of implementing a dynamic and real-time Voice over IP (VoIP) service adaptation mechanism in order to avoid Perceived Quality of Service (PQoS) degradations. We have studied the most relevant parameters affecting the PQoS experienced by end users in VoIP services over mobile accesses. We will describe the enhancements carried out in the implementation of the simulation model in order to assess VoIP PQoS based on ITU-T E-model and introduce a real-time service adaptation method. This adaptation method involves codec and packetization changes through SIP signalling, jointly to dejittering buffer management, and would be launched upon detection of PQoS degradation, in order to enhance end users' experience.</span>

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