DATA MANAGEMENT SYSTEM, DATA MANAGEMENT METHOD, VIRTUAL MEMORY DEVICE, VIRTUAL MEMORY CONTROL METHOD, READER/WRITER DEVICE, IC MODULE ACCESS DEVICE, AND IC MODULE ACCESS CONTROL METHOD

摘要

ID is accumulated on an IC module and link is formed with a virtual memory module data so as to virtually extend the IC module side memory. The file structure of the IC module data accumulation section has an upper limit value and is connected to a file structure of the virtual memory module side. The IC module is connected to the virtual memory module connected via a network. When the IC module performs communication with a reader/writer, the data accumulation section in the virtual memory module is accessed if the data which should be accumulated in the IC module cannot be found in the IC module.