| 摘要 |
It is an object to provide a data collection system that is configured to reduce a communication amount, etc. at the time when data are collected from devices, so as to reduce a communication amount attended by the collection of data without increasing processing loads imposed on devices. The data collecting device comprises a code operating means for deriving a frequency of the symbol for each symbol corresponding to the code being contained in the already compressed data based upon the data analysis result being contained in the received already compressed data, and a code operation developing means for adding the frequency of the description format, out of the frequencies obtained by the code operating means, to the frequency of the basic symbol corresponding to the above description format, and adding the frequency of the derivative symbol to the frequency of each basic symbol constituting the derivative symbol.
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