Reliable communication on the sensor network with unknown probabilistic structure

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We have analyzed fundamental properties of sensor network on the basis of the multi-terminal information theory. In particular, we have considered the mixed sources and mixed channels, and derived the fundamental limits on the reliable communication. This is because some situations in which we know the class of probabilistic model but we do not know its parameter, can be formulated by the mixed models. We have determined the optimal second-order achievable rates in the single source coding problem and the optimal achievable rate region in the multi-terminal source coding problem. Moreover, we have observed that the optimal achievable rates in some problems on channel coding can be determined by using the similar approach.