Publications

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Thesis
A. Sfairopoulou, "A cross-layer mechanism for QoS improvements in VoIP over multi-rate WLAN networks", PhD dissertation, Universitat Pompeu Fabra, 2008.
Report
A. Sfairopoulou, C. Macian, and B. Bellalta, "Dynamic measurement-based codec selection for VoIP in multirate IEEE 802.11 WLANs", The 8th COST 290 Management Committee Meeting, no. TD(07)018, Malaga, University of Malaga, 02/2007.
A. Sfairopoulou, B. Bellalta, and C. Macian, "Joint Admission Control and Adaptive VoIP Codec Selection Policies in Multi-rate WLANs", The 10th Cost290 Meeting, no. TD(07)042, Vienna, 10/2007.
Journal Article
A. Sfairopoulou, B. Bellalta, C. Macian, and M. Oliver, "A Comparative Survey of Adaptive Codec Solutions for VoIP over Multi-rate WLANs: a Capacity vs Quality performance Trade-off", EURASIP Special Issue on Multiple Access Communications in Future-Generation Wireless Network, 2011.
A. Sfairopoulou, B. Bellalta, and C. Macian, "How to tune VoIP codec selection in WLANs?", IEEE Communicattion Letters, vol. 12, issue 8, 08/2008.
C. Cano, B. Bellalta, A. Sfairopoulou, and M. Oliver, "Low Energy Operation in WSNs: A Survey of Preamble Sampling MAC Protocols", Computer Networks, 2011.
C. Cano, B. Bellalta, A. Sfairopoulou, and J. Barceló, "A Low Power Listening MAC with Scheduled Wake Up after Transmissions for WSNs", IEEE Communication Letters, vol. 13, issue 4, 04/2009. Abstract
C. Cano, B. Bellalta, A. Sfairopoulou, M. Oliver, and J. Barceló, "Taking Advantage of Overhearing in Low Power Listening WSNs: A Performance Analysis of the LWT-MAC Protocol", Mobile Networks and Applications., 2010.
C. Cano, B. Bellalta, A. Sfairopoulou, and J. Barceló, "Tuning the EDCA Parameters in WLANs with Heterogeneous Traffic: A Flow-level Analysis", To be published in Computer Networks. , 2010. Abstract
J. Barceló, A. Sfairopoulou, and B. Bellalta, "Wireless open metropolitan area networks", ACM SIGMOBILE Mobile Computing and Communications Review, vol. 12, issue 3: ACM New York, NY, USA, 07/2008.
Conference Paper
C. Cano, A. Sfairopoulou, B. Bellalta, J. Barceló, and M. Oliver, "Analytical Model of the LPL with Wake up after Transmissions MAC protocol for WSNs", International Symposium on Wireless Communication Systems (ISWCS 09), Siena, Italy, 09/2009. Abstract
A. Sfairopoulou, C. Macian, and B. Bellalta, "Architecture of a VoIP Traffic Exchange Point", EUNICE Summer School, Stuttgart, Germany, 09/2006.
C. Macian, J. Barceló, A. Sfairopoulou, M. Oliver, and J. Infante, "Arquitectura de gestión de un operador neutral Wi-Fi", V Jornadas de Ingenieria Telematica (JITEL) 2005, Vigo, Spain, 09/2005.
C. Macian, A. Sfairopoulou, and M. Oliver, "Arquitectura para un punto de intercambio de trafico de voz sobre IP", XV Jornadas Telecom I+D, Madrid, Spain, 11/2005.
C. Macian, J. Barceló, A. Sfairopoulou, M. Oliver, and J. Infante, "Barcelona's Open Access Network Testbed", IEEE TridentCom, Barcelona, Spain, 03/2006.
J. Rendon, R. Ferrus, A. Sfairopoulou, and F. Casadevall, "Cross-layer interaction between TCP and UMTS RRM scheduling algorithms", VTC2006-Fall, Montreal, Canada, 09/2006.
J. Barceló, B. Bellalta, A. Sfairopoulou, C. Cano, and M. Oliver, "CSMA with Enhanced Collision Avoidance: a Performance Assessment", IEEE VTC Spring, 2009.
J. Barceló, B. Bellalta, C. Cano, A. Sfairopoulou, and M. Oliver, "Dynamic Parameter Adjustment in CSMA/ECA", Multiple Access Communications (MACOM) 2010, Barcelona, Springer, 09/2010.
A. Sfairopoulou, C. Cano, E. Bonada, and B. Bellalta, "Evaluating the LWT-MAC performance in query-driven WSNs using data-centric routing", MACOM 2011, 09/2011.
J. Rendon, R. Ferrus, F. Casadevall, and A. Sfairopoulou, "Experimental analysis of TCP behaviour over a downlink UMTS channel under different scheduling strategies", IST Mobile and Wireless Communications Summit 2004, Lyon, France, 06/2004.
J. Rendon, R. Ferrus, A. Sfairopoulou, and F. Casadevall, "Impact of UMTS load control mechanisms on TCP", IST Mobile & Wireless Communications Summit, Myconos, Greece, 06/2006.
C. Cano, J. Barceló, A. Sfairopoulou, and B. Bellalta, "A Novel MAC Protocol for Event-Based Wireless Sensor Networks: Improving the Collective QoS", Wired/Wireless Internet Communications (WWIC 2009), Enschede, the Netherlands, Springer-Verlag New York Inc, pp. 1, 05/2009. Abstract
R. Ferrus, F. Casadevall, J. Rendon, A. Sfairopoulou, and X. Reves, "On the impact of prioritised radio resource control on TCP connections in a downlink UMTS channel", IEEE PIMRC 2004, Barcelona, Spain, 09/2004.
A. Sfairopoulou, J. Barceló, B. Bellalta, C. Macian, and M. Oliver, "Position Information for VoIP Emergency Calls", Web Information Systems and Technologies, Barcelona, Spain, 03/2007.
A. Sfairopoulou, C. Macian, and B. Bellalta, "QoS adaptation in SIP-based VoIP calls in multi-rate 802.11 environments", ISWCS 2006, Valencia, 09/2006.