Yoshio Sugizaki

A new estimation method using RTT for available bandwidth of a bottleneck link

The Internet real-time applications are growing rapidly, and available bandwidth estimation is required. Available bandwidth estimation methods by end host have been studied e.g. Pathload and pathChirp. These methods parameterize probe packets volume and observe the delay variation to estimate available bandwidth. In these methods, probe packets give heavy overhead loads on the network. In this paper, we propose a new available bandwidth estimation method based on frequency of minimum RTT of probe packets in multi hop links. This method estimates bandwidth utilization and available bandwidth of a bottleneck link without severe network loads. Estimation accuracies are evaluated for available bandwidth by implementing the proposed method. The proposed method shows better performance than those of pathChirp and Pathload, requiring smaller number of probe packets and less estimation time simultaneously.

A new application-level link aggregation and its implementation on Android terminals

Link aggregation bundles multiple physical links on a single virtual link, enabling very high-speed and large-capacity data communications. It also enables redundant communications. Several link aggregation methods have been proposed. These methods utilize transport/or lower layer link aggregation. In this paper, a new application-level link aggregation is proposed and implemented on Android operating system (OS), which is one of the popular OSs for mobile devices such as smartphones and tablet PCs. The proposed application-level link aggregation method is verified with use of an implemented terminal. Copyright

A new application level link aggregation and its implementation on Android terminals

Link aggregation bundles multiple physical links on a single virtual link, enabling very high-speed and large-capacity data communications. It also enables redundant communications. Several link aggregation methods have been proposed. These methods utilize transport layer link aggregation. In this paper, a new application level link aggregation is proposed and implemented on Android OS, which is one of the popular OSs for mobile devices such as smartphones and tablet PCs. The proposed application level link aggregation method is verified with use of an implemented terminal.