Takeki Yazaki

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The next-generation cloud computing systems are expected to be connected to the real world more tightly by massive amounts of sensors and actuators. Today's clouds, however, are not capable of handling massive sensor data or giving fast feedback to the real world because of the long latency and limited bandwidth of WANs. We propose a cloud architecture that(More)
AS advances are made in cloud computing, corporate data is increasingly being consolidated in data centers and there is a trend toward making active use of cloud services based around these data centers. This is driving demands for data centers to achieve greater reliability and operational performance in their role of providing the infrastructure for(More)
In this paper, future requirements we believe that will be needed for achieving power efficient routers are shown. The optical backplane is a proposal technology we are working on, which enables a high-speed and power efficient data transmission in backplane of routers and switches, by connecting the electronic devices together with optical paths. It is(More)
In policy-based networks, two or more policies often have to cooperate because combined and customized network functions must be controlled using policies. Two types of policy transformation, policy fusion and policy division, are sometimes required to implement cooperating policy systems on high-performance hardware routers. Policy fusion transforms two or(More)
A new bandwidth-control design - called policer for packet probable discard (PPPD) - has been developed. This not only limits the bandwidth of each user to a policing bandwidth, but also achieves TCP throughputs equal to the policing bandwidth. The proposed PPPD uses an improved leaky bucket algorithm, by which packets are discarded at a certain probability(More)
OVERVIEW: IP networks have become an important communication infrastructure. Such services as virtual private networks (VPNs) for enterprises, electronic-commerce, and voice over IP are being deployed over them. Accordingly, the volume of traffic carried over IP networks is growing dramatically. To support this growth, higher speed line-interfaces and(More)
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