Performance evaluation of ip multimedia services in live mobile networks
- Autores: Almudena Díaz Zayas
- Directores de la Tesis: Pedro Merino Gómez (dir. tes.)
- Lectura: En la Universidad de Málaga ( España ) en 2009
- Idioma: español
- Tribunal Calificador de la Tesis: José María Troya Linero (presid.), Manuel Diaz Rodriguez (secret.), Martín Varela Rico (voc.), Álvaro Suárez Sarmiento (voc.), Andrés Marín López (voc.)
- Materias:
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- Resumen
Telecommunication networks are continuously evolving. With the introduction of packet data traffic in mobile networks many new services have appeared, such as video streaming, which deliver voice, data, audio and video in an integrated manner. These new services have some special real time requirements. In this thesis we evaluate video streaming over mobile networks in terms of traffic performance and energy consumption, and study the effects that mobility issues have on these two topics.
The methodology proposed in this thesis to carry out this evaluation is centered on the use of off-the-shelf smart phones as measurement tools. Since mobile phones act as an interface between subscribers and the network, sampling data from the phone itself becomes critical. This is also an important line of activity due to the evolution of mobile platforms and the processing power and connectivity of the new generation of mobile terminals.
Traditional methods for analyzing mobile data communications' performance in realistic scenarios were based on trials, using mobile devices only as modems with the applications running on a laptop. This configuration has some disadvantages as we need additional hardware for doing measurements. Also, and maybe the most important disadvantage, is that neither real mobile applications nor the IP stack of the mobile device are not evaluated.
Another consequence of network evolution is the coexistence of different radio access technologies, which, depending on their availability, can be used by mobile terminals. B3G (Beyond 3G) systems are expected to be based on the integration of different technologies, such as 3G enhancements and WLAN, in order to offer services as transparently as possible. Vertical handover makes it necessary to measure quality of service from the user perspective instead of focusing on particular technologies. As smart phones offer many communication interfaces such as GSM, GPRS, WCDMA, HSDPA and WLAN it is possible to measure end-to-end performance even in the presence of handovers or other mobility issues. In this thesis we obtain real measurements of video streaming service in live GPRS/UMTS/HSDPA networks. We provide a complete methodology to evaluate services performance and energy consumption in both static and vehicular scenarios. The measurements collected are relevant in order to characterize video streaming services, and other services such as mobile TV, in real cellular networks and vehicular scenarios.
