| 摘要 |
PROBLEM TO BE SOLVED: To surely realize 'FIFO' for reading out a data carrier entering a service area in the next place, after wholly finishing readout of the data carrier entering the service area in the first place. SOLUTION: This system uses the data carrier to which a precedence degree control code and a tag ID, composed of a specifying ID proper to an individual tag are imparted, counts an ID readout sequence received from a reader/writer device, heightens order of precedence of the precedence degree control code every time when a count value of the ID readout sequence becomes a preset frequency, prevents response leakage to the ID readout sequence from the reader/writer device, and can do, without executing processing by unreasonably quickening a communication speed of the reader/writer device R/W and the data carrier 100. |
