Katsushi Kobayashi

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SUMMARY IP multicast technology is highly advantageous for various applications and future needs in the Internet. Yet, it is generally recognized that the IP multicast routing protocol is fairly complex and non-scalable and requires additional maintenance and operational cost to network administrators. Although there has been much research related to IP(More)
—Transmission timer framework is proposed for rate based pacing (RBP) TCP, in order to mitigate a bursti-ness in TCP slow-start. In this approach, host software specifies the time for each packet that should be sent out, and gives a precise interframe gap for the data stream. An RBP TCP implementation including a transmission timer aware network interface(More)
Congestion control with explicit router feedback, such as TCP Quick-Start and XCP, is a promising way to enhance the performance of data transport especially in high-speed networks. When designing such transport protocols, the trade-off between the granularity of feedback information and additional cost of routers for feedback processing and state keeping(More)
Links with high bandwidth ranging from 1 to 10 Gbps are increasingly in use worldwide. Congestion control with the positive use of router feedback that explicitly indicates network conditions is a promising way to address the performance issues of congestion control especially in such high-speed networks. In this paper, we propose SIRENS, a scalable,(More)
In this study, we present the flexible arrays of inexpensive network (FAIN) architecture: it can be used to maximize parallelism in network systems in order to satisfy future Internet traffic growth. Although the "parallel-in-global" approach used in FAIN overcomes a constraints of serial interfaces, the performance of applications with s small stream can(More)
Congestion control with the positive use of explicit notification that indicates internal network conditions is a promising way to address the performance issues of congestion control in high-speed networks. We previously proposed SIRENS, a scalable, robust, and flexible fine-grained explicit notification framework where each router captures a snapshot of(More)
In densely deployed wireless sensor networks, sensor observations are spatially correlated. Furthermore, the nature of physical phenomena constitutes a temporal correlation between transmitted observations of an individual sensor node. In this paper, we propose a joint iterative channel decoding scheme using turbo codes. The proposed decoder exploits the(More)