| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent reduction of reading speed, and to reduce power consumption, by efficiently suppressing occurrence of collision and reducing a reading trial frequency, in an RFID (Radio Frequency IDentification) tag performing anti-collision by transmitting its own ID after a prescribed time to a call from a reader. <P>SOLUTION: An ID transmission method for the RFID tag executes: a step (S102) of obtaining a first waiting time based on a time slot; a step (S103) of obtaining a second waiting time based on a value of a Wait level with a time width larger than a maximum value of the first waiting time as a unit; steps (S104, S105) of delaying a total time of them and transmitting the ID; and steps (S122, S123) of resetting a non-reading counter and the Wait level when receiving a response; and executes a step (S131) of incrementing the non-reading counter when cannot receive the response; and a step (S133) increasing the Wait level when the non-reading counter reaches a prescribed threshold value. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
