Tsukasa Iwama

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We present in this paper a general framework for a combined optimization/simulation approach where constraints to be satisfied are identified from results of simulation evaluation of the proposed system alternative, and then these constraints are added to the optimization model for reoptimization. The proposed cutting-plane-like procedure is iterative and(More)
One effective way to make a large-capacity mobile communication system is to use a microcellular system. One way to do this is to place the base station antennas lower than the surrounding buildings. This result in what is called a street microcellular system. We previously presented basic simulation results evaluating the performance of a different-sized(More)
A storage system constructed by a wide-area distributed file system of open source software has been requested to ensure the certain existence of the non-falsification data by a trusted third party. We developed an integrity verification application using timestamp mechanism for Gfarm which is a wide-area distributed file system of open source software made(More)
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