IEICE English Webinar "From QoS to QoE: Review of Changes in Service Quality Research"

IEICE English Webinar Distinguished Lecturer Program Series December 2023

”From QoS to QoE: Review of Changes in Service Quality Research”
Lecturer: Prof. Tatsuya Yamazaki (Niigata University)

Biography:
Tatsuya Yamazaki received the B.E., M.E. and Ph.D. degrees in information engineering from Niigata University, Niigata, Japan, in 1987, 1989 and 2002, respectively. He joined Communications Research Laboratory (at present, National Institute of Information and Communications Technology) as a researcher in 1989. Since August 2013, he has been with the Faculty of Engineering, Niigata University, Niigata, where he is currently a Professor. He is also the director at the Big Data Activation Research Center of Niigata University. From 1992 to 1993 and 1995 to 1996 he was a visiting researcher at the National Optics Institute, Canada. From 1997 to 2001 he was a senior researcher at ATR Adaptive Communications Research Laboratories.
His research interests include multimedia data processing, pattern recognition, statistical image processing, sensing data analysis, and communication service quality management.
He served as general co-chair of IEEE Workshop on Knowledge Media Networking (KMN'02) and general chair of the 5th International Conference On Smart Homes and Health Telematics (ICOST 2007).
He is a member of the Institute of Electronics, Information and Communication Engineers, the Information Processing Society of Japan, the Institute of Image Information and Television Engineers, the Japanese Society for Artificial Intelligence, Human Interface Society, Japan Society for Simulation Technology, and the IEEE.

Summary：
The recent focus in networking has shifted from Quality of Service (QoS) to Quality of Experience (QoE). QoS traditionally dealt with mechanisms and technologies for controlling network traffic and managing network resources, often through differentiated handling and resource allocation for high-priority traffic. Although QoS evaluation involves parameters like bandwidth, throughput, latency, delay jitter, and packet loss for network systems, human intervention is rarely considered in this context.
In contrast, QoE has become a key metric for assessing user satisfaction with service quality. QoE is subjective and linked to user perceptions and expectations, leading to ongoing research challenges. These challenges include how to measure subjective QoE, how to connect QoE with QoS parameters related to system performance, and how to integrate QoE into multimedia and communication services. Researchers have made significant contributions in addressing these issues.
QoE's definition by ITU-T as "the overall acceptability of an application or service" is somewhat ambiguous, so it is more practical to focus on specific applications to discuss QoE. Currently, video streaming and Web applications are prominent areas of QoE research due to their high user demand.
In this lecture, the historical evolution of QoS and QoE is discussed, with a particular emphasis on current QoE research topics, especially in the context of video streaming. Researchers are making strides in understanding and improving the user experience in these application domains.

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