Abstract
While speech services in mobile communication systems are investigated quite well, video telephony services are relatively novel in this sector. Because of the market penetration of camera equipped mobile phones the video telephony service is expected to become a widely used service. In this article an introduction of the protocols used for video telephony in UMTS is given. Concepts for the performance evaluation in terms of video (PEVQ) and audio quality (PESQ) are presented and utilized. Evaluations are performed by both live measurements and network emulation. The results show that there is quite potential for improvements related to video telephony in UMTS in terms of video quality and channel setup time. Finally, an improved radio bearer configuration is provided which aims at a better integration of video telephony services into the UMTS architecture.
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Malkowski, M., Claßen, D. Performance of Video Telephony Services in UMTS using Live Measurements and Network Emulation. Wireless Pers Commun 46, 19–32 (2008). https://doi.org/10.1007/s11277-007-9353-5
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DOI: https://doi.org/10.1007/s11277-007-9353-5