Data transmission management apparatus and data transmission system, and methods thereof

摘要

When a data transmission apparatus transmits data to a data reception apparatus, a band management table storage section maintains a band management table. This table describes band availability identification information based on a relationship between a split band obtained by dividing a data communication band and a band transmission time interval for each split band via a communication line. A global resource management table storage section maintains a global resource management table which indicates states of the data transmission apparatus and the data reception apparatus. A table management section references the band management table and the global resource management table based on a transmission condition request from the data transmission apparatus. An alternative creation section creates an alternative transmission condition indicative of a condition for allowing the data transmission apparatus to send data to the data reception apparatus. Alternative transmission condition information is sent to a data transmission apparatus.