RFID interrogator calculating adaptive retransmission wait time and control method thereof

摘要

As an RFID interrogator calculating an adaptive retransmission wait time and a control method thereof, the RFID interrogator includes a collision diagnosis unit that analyzes data on a received signal received during a receive time in correspondence with a transmitted signal from an RF communication unit that can transmit and receive signal to and from one or more tag, verifies whether or not a collision occurs in the received signal, and diagnoses a collision type depending on an analysis result of the data on the received signal; a situational command retransmission portion that determines whether or not the command is retransmitted on the basis of the occurrence of the collision and the collision type received from the collision diagnosis unit; and a random wait time calculation portion that calculates a random wait time for retransmitting the command.

主权项

1. An RFID interrogator calculating an adaptive retransmission wait time, comprising:
a collision diagnosis unit that analyzes data on a received signal, verifies whether a collision occurs in the received signal, and in response to a determination that a collision has occurred, diagnoses a collision type depending on an analysis result of the data on the received signal; a situational command retransmission portion that determines whether a command will be retransmitted on the basis of the collision type; and in response to the determination that the command will be retransmitted, a random wait time calculation portion calculates a random wait time for retransmitting the command, wherein the random wait time calculation portion randomly selects the random wait time between a minimum retransmission wait time and a maximum retransmission wait time; and the minimum retransmission wait time is calculated by multiplying a wait time parameter by a lower threshold of a retransmission wait threshold value, and the maximum retransmission wait time is calculated by multiplying the wait time parameter by a higher threshold of the retransmission wait threshold value, and the wait time parameter is dynamically changed.