报告人：Dr. Fehmi Ben Abdesslem (Swedish Institute of Computer Science, Sweden)时间：2015 年 11 月 13 日（周五）上午 10:00-11:00地点：计算机楼 405联系人：赵进 jzhao@fudan.edu.cn
Abstract:
Video traffic now represents a growing proportion of the traffic on cellular networks, causing capacity problems for operators and increased delays for users. Studies have shown that deploying caches at the network level reduces the delay for the end-user and the overall traffic volume for the telecom operator. In this talk, the analysis of a large nation-wide dataset will be presented. The dataset contains real-life video requests sent by mobile users to a popular video streaming website. This analysis is the first to rely on such a large dataset, and sheds light on the optimal cacheability of video content with caches distributed in the cellular network, and how efficient some existing cache replacement algorithms are at reducing the number of requests sent to the video provider. Depending on the cache size and algorithm parameters, the analysis shows that up to 20.33% of the requests can be served by a local cache.
Bio:
Dr Fehmi Ben Abdesslem received his M.Sc and PhD from the University of Paris 6 in 2008, before working as a research associate at the University of St Andrews, and at the University of Cambridge. He has then been awarded a Marie-Curie research fellowship from the European Commission (ERCIM) to join the Swedish Institute of Computer Science (SICS), and is now a permanent Senior Research Scientist at SICS, in the Decisions, Networks and Analytics laboratory. His research interests are centred on wireless networks, and include privacy and social aspects of mobile services, and data analysis from cellular and sensor networks.
