Information processing device, line concentrator, network information processing system having the line concentrator, information processing program and storage medium

An information processing device, comprising:

• a storage section;
• a reception section capable of receiving (i) data transmitted to a shared address commonly used to address the information processing device and to address one or more other information processing devices and (ii) data transmitted to a particular address of the information processing device;
• a frame analysis section for analyzing (I) whether the received data is data transmitted to the particular address or not and (II) whether the received data is data transmitted to the shared address or not;
• a status change processing section for switching between (a) an active status which allows additional registration of the data transmitted to the shared address and processing of the data and (b) a non-active status other than the active status;
• a registration processing section for adding and registering the data received by the reception section into the storage section in such a manner that, if the data received by the reception section is data transmitted to the shared address, the registration processing section adds and registers the data into the storage section only when the information processing device is in the active status, and, if the data received by the reception section is data transmitted to the particular address, the registration processing section adds and registers the data into the storage section, regardless of whether the information processing device is in the active status or not;
• and
• a data processing section for processing the data stored in the storage section;
• wherein the status change processing section instructs one or more other information processing devices to change into the active status when an amount of unprocessed data registered in the storage section exceeds a predetermined threshold value, and the status change processing section changes the information processing device into the non-active status and causes the data processing section to process the unprocessed data.