Patent ID: 8561900

Claim:
A data transfer system comprising: a data accumulation device for accumulating data; and a data acquisition device for acquiring data from the data accumulation device by wireless communication; the data accumulation device including: (a) a first wireless communication unit for performing wireless communication of data; (b) a first data holding unit for holding data; and (c) a data transmission unit for transmitting data held in the first data holding unit to the data acquisition device via the first wireless communication unit, in the event that the data acquisition device is within a communicable range; and the data acquisition device including: (a) a second wireless communication unit for performing wireless communication of data; (b) a type registration unit wherein data types of necessary data are registered beforehand; (c) a type comparison unit for: comparing the data type of data received via the second wireless communication unit with data types registered in the type registration unit; and determining a length of a data body of the data by reading a data length header included with the data; (d) a data extracting unit for extracting only data of which the data type matches by using the length of the data body to skip extraction of the data body of the data that is determined to be unnecessary by the type comparison unit; and (e) a second data holding unit for holding the extracted data.