Patent ID: 7009518
Filing Date: 2006-03-07
Classification: G06K

Abstract:
1. A radio frequency identification (RFID) communication system, comprising: a reader, to produce at least one search instruction and to send the search instruction to a communication region; and a plurality of transponders, each, with built-in data, having a first receiver, a first transmitter, a counter, a random number generator and a first controller, wherein when the transponders enter the communication region, in each transponder, the random number generator generates a random number and the counter starts to count search instruction received by the first receiver to thus obtain a counting value; and when in one of the transponders, the counting value meets with the random number, the first controller sends a response request to the reader through the first transmitter, such that the reader after receiving the response request does not send the search instruction but sends at least one read instruction to read the built-in data.