| 摘要 |
PROBLEM TO BE SOLVED: To prevent wasteful data communication and to securely receive data. SOLUTION: Control information is received from a transmission terminal (YES in S6) and an area in a size designated by control information is previously secured (S8 to S16 and S22 to S26). Then, data is received (NO in S6) and data is stored in the secured area (S18 to S20).
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