Rfid communication method

PURPOSE: An RFID communication method is provided to communicate with a plurality of RFID tags, thereby using the bandwidth of a communication channel efficiently. CONSTITUTION: A plurality of band spread data are stored in a plurality of RFID(Radio Frequency Identification System) tags(S210). The band spread data are transmitted from the RFID tags to an RFID reader(S220). The RFID tags transmits the band spread data to the RFID reader at the same time. The RFID reader extracts a plurality of original data corresponding to a plurality of RFID tags from the band spread data at the same time(S230).