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Understanding the Quality of Experience (QoE) of users is important for network and service providers. Many researches of QoE have been reported where subjective analysis, e.g. in the form of Mean Opinion Score (MOS), for audio/video applications and data services are performed. These studies mainly focus on how users feel while using such applications. In this paper, we focus on how users behave...
Video streaming services using TCP as a transport layer protocol -- represented by YouTube -- are becoming increasingly popular and, accordingly, have come to account for a significant portion of Internet traffic. TCP is greedy, that is, it tries to exhaust the entire bandwidth. Thus, video streaming over TCP tends to unnecessarily take bandwidth from competing traffic. In this paper, we first investigate...
Per-flow unfairness of TCP throughput in the IEEE 802.11 wireless LAN environment has been reported. Although a number of researchers have proposed various methods for alleviating the unfairness, they evaluated the fairness of their methods separately from the network bandwidth utilization, meaning that they did not consider the trade-off relationships between fairness and bandwidth utilization. In...
With the widespread use of broadband access technologies and the development of high-speed Internet backbones, the requirement for high-performance metropolitan area networks (MANs) is increasing. Traditional ring- or star-based metro networks are costly to scale up to high speed and cannot recover from multiple failures, while backbone solutions are too expensive to fit into the cost-sensitive metro...
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